Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 1 | /* |
| 2 | ** Routines to represent binary data in ASCII and vice-versa |
| 3 | ** |
| 4 | ** This module currently supports the following encodings: |
| 5 | ** uuencode: |
| 6 | ** each line encodes 45 bytes (except possibly the last) |
| 7 | ** First char encodes (binary) length, rest data |
| 8 | ** each char encodes 6 bits, as follows: |
| 9 | ** binary: 01234567 abcdefgh ijklmnop |
| 10 | ** ascii: 012345 67abcd efghij klmnop |
| 11 | ** ASCII encoding method is "excess-space": 000000 is encoded as ' ', etc. |
| 12 | ** short binary data is zero-extended (so the bits are always in the |
| 13 | ** right place), this does *not* reflect in the length. |
Jack Jansen | 84bbc2e | 1995-10-04 16:38:44 +0000 | [diff] [blame] | 14 | ** base64: |
| 15 | ** Line breaks are insignificant, but lines are at most 76 chars |
| 16 | ** each char encodes 6 bits, in similar order as uucode/hqx. Encoding |
| 17 | ** is done via a table. |
| 18 | ** Short binary data is filled (in ASCII) with '='. |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 19 | ** hqx: |
| 20 | ** File starts with introductory text, real data starts and ends |
| 21 | ** with colons. |
| 22 | ** Data consists of three similar parts: info, datafork, resourcefork. |
| 23 | ** Each part is protected (at the end) with a 16-bit crc |
| 24 | ** The binary data is run-length encoded, and then ascii-fied: |
| 25 | ** binary: 01234567 abcdefgh ijklmnop |
| 26 | ** ascii: 012345 67abcd efghij klmnop |
| 27 | ** ASCII encoding is table-driven, see the code. |
| 28 | ** Short binary data results in the runt ascii-byte being output with |
| 29 | ** the bits in the right place. |
| 30 | ** |
| 31 | ** While I was reading dozens of programs that encode or decode the formats |
| 32 | ** here (documentation? hihi:-) I have formulated Jansen's Observation: |
| 33 | ** |
| 34 | ** Programs that encode binary data in ASCII are written in |
| 35 | ** such a style that they are as unreadable as possible. Devices used |
| 36 | ** include unnecessary global variables, burying important tables |
| 37 | ** in unrelated sourcefiles, putting functions in include files, |
| 38 | ** using seemingly-descriptive variable names for different purposes, |
| 39 | ** calls to empty subroutines and a host of others. |
| 40 | ** |
| 41 | ** I have attempted to break with this tradition, but I guess that that |
| 42 | ** does make the performance sub-optimal. Oh well, too bad... |
| 43 | ** |
| 44 | ** Jack Jansen, CWI, July 1995. |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 45 | ** |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 46 | ** Added support for quoted-printable encoding, based on rfc 1521 et al |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 47 | ** quoted-printable encoding specifies that non printable characters (anything |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 48 | ** below 32 and above 126) be encoded as =XX where XX is the hexadecimal value |
| 49 | ** of the character. It also specifies some other behavior to enable 8bit data |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 50 | ** in a mail message with little difficulty (maximum line sizes, protecting |
| 51 | ** some cases of whitespace, etc). |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 52 | ** |
| 53 | ** Brandon Long, September 2001. |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 54 | */ |
| 55 | |
Thomas Wouters | 9c54448 | 2006-03-01 21:59:44 +0000 | [diff] [blame] | 56 | #define PY_SSIZE_T_CLEAN |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 57 | |
| 58 | #include "Python.h" |
Christian Heimes | 1dc5400 | 2008-03-24 02:19:29 +0000 | [diff] [blame] | 59 | #ifdef USE_ZLIB_CRC32 |
| 60 | #include "zlib.h" |
| 61 | #endif |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 62 | |
| 63 | static PyObject *Error; |
| 64 | static PyObject *Incomplete; |
| 65 | |
| 66 | /* |
| 67 | ** hqx lookup table, ascii->binary. |
| 68 | */ |
| 69 | |
| 70 | #define RUNCHAR 0x90 |
| 71 | |
| 72 | #define DONE 0x7F |
| 73 | #define SKIP 0x7E |
| 74 | #define FAIL 0x7D |
| 75 | |
| 76 | static unsigned char table_a2b_hqx[256] = { |
| 77 | /* ^@ ^A ^B ^C ^D ^E ^F ^G */ |
| 78 | /* 0*/ FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, |
| 79 | /* \b \t \n ^K ^L \r ^N ^O */ |
| 80 | /* 1*/ FAIL, FAIL, SKIP, FAIL, FAIL, SKIP, FAIL, FAIL, |
| 81 | /* ^P ^Q ^R ^S ^T ^U ^V ^W */ |
| 82 | /* 2*/ FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, |
| 83 | /* ^X ^Y ^Z ^[ ^\ ^] ^^ ^_ */ |
| 84 | /* 3*/ FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, |
| 85 | /* ! " # $ % & ' */ |
| 86 | /* 4*/ FAIL, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, |
| 87 | /* ( ) * + , - . / */ |
| 88 | /* 5*/ 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, FAIL, FAIL, |
| 89 | /* 0 1 2 3 4 5 6 7 */ |
| 90 | /* 6*/ 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, FAIL, |
| 91 | /* 8 9 : ; < = > ? */ |
| 92 | /* 7*/ 0x14, 0x15, DONE, FAIL, FAIL, FAIL, FAIL, FAIL, |
| 93 | /* @ A B C D E F G */ |
| 94 | /* 8*/ 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, |
| 95 | /* H I J K L M N O */ |
| 96 | /* 9*/ 0x1E, 0x1F, 0x20, 0x21, 0x22, 0x23, 0x24, FAIL, |
| 97 | /* P Q R S T U V W */ |
| 98 | /*10*/ 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, FAIL, |
| 99 | /* X Y Z [ \ ] ^ _ */ |
| 100 | /*11*/ 0x2C, 0x2D, 0x2E, 0x2F, FAIL, FAIL, FAIL, FAIL, |
| 101 | /* ` a b c d e f g */ |
| 102 | /*12*/ 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, FAIL, |
| 103 | /* h i j k l m n o */ |
| 104 | /*13*/ 0x37, 0x38, 0x39, 0x3A, 0x3B, 0x3C, FAIL, FAIL, |
| 105 | /* p q r s t u v w */ |
| 106 | /*14*/ 0x3D, 0x3E, 0x3F, FAIL, FAIL, FAIL, FAIL, FAIL, |
| 107 | /* x y z { | } ~ ^? */ |
| 108 | /*15*/ FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, |
| 109 | /*16*/ FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, |
| 110 | FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, |
| 111 | FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, |
| 112 | FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, |
| 113 | FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, |
| 114 | FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, |
| 115 | FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, |
| 116 | FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, |
| 117 | FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, |
| 118 | FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, |
| 119 | FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, |
| 120 | FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, |
| 121 | FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, |
| 122 | FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, |
| 123 | FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, |
| 124 | FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, |
| 125 | }; |
| 126 | |
| 127 | static unsigned char table_b2a_hqx[] = |
Roger E. Masse | 5f4ce18 | 1997-01-16 17:10:22 +0000 | [diff] [blame] | 128 | "!\"#$%&'()*+,-012345689@ABCDEFGHIJKLMNPQRSTUVXYZ[`abcdefhijklmpqr"; |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 129 | |
Jack Jansen | 84bbc2e | 1995-10-04 16:38:44 +0000 | [diff] [blame] | 130 | static char table_a2b_base64[] = { |
| 131 | -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, |
| 132 | -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, |
| 133 | -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,62, -1,-1,-1,63, |
| 134 | 52,53,54,55, 56,57,58,59, 60,61,-1,-1, -1, 0,-1,-1, /* Note PAD->0 */ |
| 135 | -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10, 11,12,13,14, |
| 136 | 15,16,17,18, 19,20,21,22, 23,24,25,-1, -1,-1,-1,-1, |
| 137 | -1,26,27,28, 29,30,31,32, 33,34,35,36, 37,38,39,40, |
| 138 | 41,42,43,44, 45,46,47,48, 49,50,51,-1, -1,-1,-1,-1 |
| 139 | }; |
| 140 | |
| 141 | #define BASE64_PAD '=' |
Guido van Rossum | 355bc0c | 2001-10-30 03:00:52 +0000 | [diff] [blame] | 142 | |
| 143 | /* Max binary chunk size; limited only by available memory */ |
Guido van Rossum | 0e225aa | 2007-05-22 20:24:57 +0000 | [diff] [blame] | 144 | #define BASE64_MAXBIN ((PY_SSIZE_T_MAX - 3) / 2) |
Jack Jansen | 84bbc2e | 1995-10-04 16:38:44 +0000 | [diff] [blame] | 145 | |
| 146 | static unsigned char table_b2a_base64[] = |
Roger E. Masse | 5f4ce18 | 1997-01-16 17:10:22 +0000 | [diff] [blame] | 147 | "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; |
Jack Jansen | 84bbc2e | 1995-10-04 16:38:44 +0000 | [diff] [blame] | 148 | |
| 149 | |
| 150 | |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 151 | static unsigned short crctab_hqx[256] = { |
Roger E. Masse | 5f4ce18 | 1997-01-16 17:10:22 +0000 | [diff] [blame] | 152 | 0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7, |
| 153 | 0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef, |
| 154 | 0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6, |
| 155 | 0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de, |
| 156 | 0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485, |
| 157 | 0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d, |
| 158 | 0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4, |
| 159 | 0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc, |
| 160 | 0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823, |
| 161 | 0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b, |
| 162 | 0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12, |
| 163 | 0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a, |
| 164 | 0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41, |
| 165 | 0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49, |
| 166 | 0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70, |
| 167 | 0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78, |
| 168 | 0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f, |
| 169 | 0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067, |
| 170 | 0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e, |
| 171 | 0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256, |
| 172 | 0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d, |
| 173 | 0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405, |
| 174 | 0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c, |
| 175 | 0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634, |
| 176 | 0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab, |
| 177 | 0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3, |
| 178 | 0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a, |
| 179 | 0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92, |
| 180 | 0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9, |
| 181 | 0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1, |
| 182 | 0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8, |
| 183 | 0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0, |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 184 | }; |
| 185 | |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 186 | PyDoc_STRVAR(doc_a2b_uu, "(ascii) -> bin. Decode a line of uuencoded data"); |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 187 | |
| 188 | static PyObject * |
Peter Schneider-Kamp | a788a7f | 2000-07-10 09:57:19 +0000 | [diff] [blame] | 189 | binascii_a2b_uu(PyObject *self, PyObject *args) |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 190 | { |
| 191 | unsigned char *ascii_data, *bin_data; |
| 192 | int leftbits = 0; |
| 193 | unsigned char this_ch; |
| 194 | unsigned int leftchar = 0; |
| 195 | PyObject *rv; |
Thomas Wouters | f98db65 | 2006-03-01 21:37:32 +0000 | [diff] [blame] | 196 | Py_ssize_t ascii_len, bin_len; |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 197 | |
Guido van Rossum | 43713e5 | 2000-02-29 13:59:29 +0000 | [diff] [blame] | 198 | if ( !PyArg_ParseTuple(args, "t#:a2b_uu", &ascii_data, &ascii_len) ) |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 199 | return NULL; |
| 200 | |
| 201 | /* First byte: binary data length (in bytes) */ |
| 202 | bin_len = (*ascii_data++ - ' ') & 077; |
| 203 | ascii_len--; |
| 204 | |
| 205 | /* Allocate the buffer */ |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame^] | 206 | if ( (rv=PyBytes_FromStringAndSize(NULL, bin_len)) == NULL ) |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 207 | return NULL; |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame^] | 208 | bin_data = (unsigned char *)PyBytes_AS_STRING(rv); |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 209 | |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 210 | for( ; bin_len > 0 ; ascii_len--, ascii_data++ ) { |
Neal Norwitz | fe92eef | 2004-06-06 20:13:10 +0000 | [diff] [blame] | 211 | /* XXX is it really best to add NULs if there's no more data */ |
| 212 | this_ch = (ascii_len > 0) ? *ascii_data : 0; |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 213 | if ( this_ch == '\n' || this_ch == '\r' || ascii_len <= 0) { |
| 214 | /* |
| 215 | ** Whitespace. Assume some spaces got eaten at |
| 216 | ** end-of-line. (We check this later) |
| 217 | */ |
| 218 | this_ch = 0; |
| 219 | } else { |
Jack Jansen | 5d95797 | 1995-11-14 10:35:19 +0000 | [diff] [blame] | 220 | /* Check the character for legality |
Roger E. Masse | 5f4ce18 | 1997-01-16 17:10:22 +0000 | [diff] [blame] | 221 | ** The 64 in stead of the expected 63 is because |
| 222 | ** there are a few uuencodes out there that use |
Guido van Rossum | 92d8917 | 2001-01-09 02:11:57 +0000 | [diff] [blame] | 223 | ** '`' as zero instead of space. |
Jack Jansen | 5d95797 | 1995-11-14 10:35:19 +0000 | [diff] [blame] | 224 | */ |
| 225 | if ( this_ch < ' ' || this_ch > (' ' + 64)) { |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 226 | PyErr_SetString(Error, "Illegal char"); |
| 227 | Py_DECREF(rv); |
| 228 | return NULL; |
| 229 | } |
| 230 | this_ch = (this_ch - ' ') & 077; |
| 231 | } |
| 232 | /* |
| 233 | ** Shift it in on the low end, and see if there's |
| 234 | ** a byte ready for output. |
| 235 | */ |
| 236 | leftchar = (leftchar << 6) | (this_ch); |
| 237 | leftbits += 6; |
| 238 | if ( leftbits >= 8 ) { |
| 239 | leftbits -= 8; |
| 240 | *bin_data++ = (leftchar >> leftbits) & 0xff; |
| 241 | leftchar &= ((1 << leftbits) - 1); |
| 242 | bin_len--; |
| 243 | } |
| 244 | } |
| 245 | /* |
| 246 | ** Finally, check that if there's anything left on the line |
| 247 | ** that it's whitespace only. |
| 248 | */ |
| 249 | while( ascii_len-- > 0 ) { |
| 250 | this_ch = *ascii_data++; |
Guido van Rossum | 92d8917 | 2001-01-09 02:11:57 +0000 | [diff] [blame] | 251 | /* Extra '`' may be written as padding in some cases */ |
| 252 | if ( this_ch != ' ' && this_ch != ' '+64 && |
Guido van Rossum | 1243ae7 | 1997-07-11 18:36:28 +0000 | [diff] [blame] | 253 | this_ch != '\n' && this_ch != '\r' ) { |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 254 | PyErr_SetString(Error, "Trailing garbage"); |
| 255 | Py_DECREF(rv); |
| 256 | return NULL; |
| 257 | } |
| 258 | } |
| 259 | return rv; |
| 260 | } |
| 261 | |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 262 | PyDoc_STRVAR(doc_b2a_uu, "(bin) -> ascii. Uuencode line of data"); |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 263 | |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 264 | static PyObject * |
Peter Schneider-Kamp | a788a7f | 2000-07-10 09:57:19 +0000 | [diff] [blame] | 265 | binascii_b2a_uu(PyObject *self, PyObject *args) |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 266 | { |
| 267 | unsigned char *ascii_data, *bin_data; |
| 268 | int leftbits = 0; |
| 269 | unsigned char this_ch; |
| 270 | unsigned int leftchar = 0; |
| 271 | PyObject *rv; |
Thomas Wouters | f98db65 | 2006-03-01 21:37:32 +0000 | [diff] [blame] | 272 | Py_ssize_t bin_len; |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 273 | |
Guido van Rossum | 43713e5 | 2000-02-29 13:59:29 +0000 | [diff] [blame] | 274 | if ( !PyArg_ParseTuple(args, "s#:b2a_uu", &bin_data, &bin_len) ) |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 275 | return NULL; |
| 276 | if ( bin_len > 45 ) { |
| 277 | /* The 45 is a limit that appears in all uuencode's */ |
| 278 | PyErr_SetString(Error, "At most 45 bytes at once"); |
| 279 | return NULL; |
| 280 | } |
| 281 | |
| 282 | /* We're lazy and allocate to much (fixed up later) */ |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame^] | 283 | if ( (rv=PyBytes_FromStringAndSize(NULL, bin_len*2+2)) == NULL ) |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 284 | return NULL; |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame^] | 285 | ascii_data = (unsigned char *)PyBytes_AS_STRING(rv); |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 286 | |
| 287 | /* Store the length */ |
| 288 | *ascii_data++ = ' ' + (bin_len & 077); |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 289 | |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 290 | for( ; bin_len > 0 || leftbits != 0 ; bin_len--, bin_data++ ) { |
| 291 | /* Shift the data (or padding) into our buffer */ |
| 292 | if ( bin_len > 0 ) /* Data */ |
| 293 | leftchar = (leftchar << 8) | *bin_data; |
| 294 | else /* Padding */ |
| 295 | leftchar <<= 8; |
| 296 | leftbits += 8; |
| 297 | |
| 298 | /* See if there are 6-bit groups ready */ |
| 299 | while ( leftbits >= 6 ) { |
| 300 | this_ch = (leftchar >> (leftbits-6)) & 0x3f; |
| 301 | leftbits -= 6; |
| 302 | *ascii_data++ = this_ch + ' '; |
| 303 | } |
| 304 | } |
| 305 | *ascii_data++ = '\n'; /* Append a courtesy newline */ |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 306 | |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame^] | 307 | if (_PyBytes_Resize(&rv, |
Guido van Rossum | 0e225aa | 2007-05-22 20:24:57 +0000 | [diff] [blame] | 308 | (ascii_data - |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame^] | 309 | (unsigned char *)PyBytes_AS_STRING(rv))) < 0) { |
Guido van Rossum | 0e225aa | 2007-05-22 20:24:57 +0000 | [diff] [blame] | 310 | Py_DECREF(rv); |
| 311 | rv = NULL; |
| 312 | } |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 313 | return rv; |
| 314 | } |
| 315 | |
Guido van Rossum | 2db4f47 | 1999-10-19 19:05:14 +0000 | [diff] [blame] | 316 | |
| 317 | static int |
Thomas Wouters | f98db65 | 2006-03-01 21:37:32 +0000 | [diff] [blame] | 318 | binascii_find_valid(unsigned char *s, Py_ssize_t slen, int num) |
Guido van Rossum | 2db4f47 | 1999-10-19 19:05:14 +0000 | [diff] [blame] | 319 | { |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 320 | /* Finds & returns the (num+1)th |
Guido van Rossum | 2db4f47 | 1999-10-19 19:05:14 +0000 | [diff] [blame] | 321 | ** valid character for base64, or -1 if none. |
| 322 | */ |
| 323 | |
| 324 | int ret = -1; |
| 325 | unsigned char c, b64val; |
| 326 | |
| 327 | while ((slen > 0) && (ret == -1)) { |
| 328 | c = *s; |
| 329 | b64val = table_a2b_base64[c & 0x7f]; |
| 330 | if ( ((c <= 0x7f) && (b64val != (unsigned char)-1)) ) { |
| 331 | if (num == 0) |
| 332 | ret = *s; |
| 333 | num--; |
| 334 | } |
| 335 | |
| 336 | s++; |
| 337 | slen--; |
| 338 | } |
| 339 | return ret; |
| 340 | } |
| 341 | |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 342 | PyDoc_STRVAR(doc_a2b_base64, "(ascii) -> bin. Decode a line of base64 data"); |
Jack Jansen | 84bbc2e | 1995-10-04 16:38:44 +0000 | [diff] [blame] | 343 | |
| 344 | static PyObject * |
Peter Schneider-Kamp | a788a7f | 2000-07-10 09:57:19 +0000 | [diff] [blame] | 345 | binascii_a2b_base64(PyObject *self, PyObject *args) |
Jack Jansen | 84bbc2e | 1995-10-04 16:38:44 +0000 | [diff] [blame] | 346 | { |
| 347 | unsigned char *ascii_data, *bin_data; |
| 348 | int leftbits = 0; |
| 349 | unsigned char this_ch; |
| 350 | unsigned int leftchar = 0; |
Jack Jansen | 84bbc2e | 1995-10-04 16:38:44 +0000 | [diff] [blame] | 351 | PyObject *rv; |
Thomas Wouters | f98db65 | 2006-03-01 21:37:32 +0000 | [diff] [blame] | 352 | Py_ssize_t ascii_len, bin_len; |
Guido van Rossum | 2db4f47 | 1999-10-19 19:05:14 +0000 | [diff] [blame] | 353 | int quad_pos = 0; |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 354 | |
Guido van Rossum | 43713e5 | 2000-02-29 13:59:29 +0000 | [diff] [blame] | 355 | if ( !PyArg_ParseTuple(args, "t#:a2b_base64", &ascii_data, &ascii_len) ) |
Jack Jansen | 84bbc2e | 1995-10-04 16:38:44 +0000 | [diff] [blame] | 356 | return NULL; |
| 357 | |
| 358 | bin_len = ((ascii_len+3)/4)*3; /* Upper bound, corrected later */ |
| 359 | |
| 360 | /* Allocate the buffer */ |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame^] | 361 | if ( (rv=PyBytes_FromStringAndSize(NULL, bin_len)) == NULL ) |
Jack Jansen | 84bbc2e | 1995-10-04 16:38:44 +0000 | [diff] [blame] | 362 | return NULL; |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame^] | 363 | bin_data = (unsigned char *)PyBytes_AS_STRING(rv); |
Jack Jansen | 84bbc2e | 1995-10-04 16:38:44 +0000 | [diff] [blame] | 364 | bin_len = 0; |
Guido van Rossum | 2db4f47 | 1999-10-19 19:05:14 +0000 | [diff] [blame] | 365 | |
| 366 | for( ; ascii_len > 0; ascii_len--, ascii_data++) { |
| 367 | this_ch = *ascii_data; |
| 368 | |
| 369 | if (this_ch > 0x7f || |
| 370 | this_ch == '\r' || this_ch == '\n' || this_ch == ' ') |
Jack Jansen | ba1de3b | 1996-01-22 10:47:15 +0000 | [diff] [blame] | 371 | continue; |
Guido van Rossum | 2db4f47 | 1999-10-19 19:05:14 +0000 | [diff] [blame] | 372 | |
| 373 | /* Check for pad sequences and ignore |
| 374 | ** the invalid ones. |
| 375 | */ |
| 376 | if (this_ch == BASE64_PAD) { |
| 377 | if ( (quad_pos < 2) || |
| 378 | ((quad_pos == 2) && |
| 379 | (binascii_find_valid(ascii_data, ascii_len, 1) |
| 380 | != BASE64_PAD)) ) |
| 381 | { |
| 382 | continue; |
| 383 | } |
| 384 | else { |
| 385 | /* A pad sequence means no more input. |
| 386 | ** We've already interpreted the data |
| 387 | ** from the quad at this point. |
| 388 | */ |
| 389 | leftbits = 0; |
| 390 | break; |
| 391 | } |
| 392 | } |
| 393 | |
| 394 | this_ch = table_a2b_base64[*ascii_data]; |
| 395 | if ( this_ch == (unsigned char) -1 ) |
| 396 | continue; |
| 397 | |
Jack Jansen | 84bbc2e | 1995-10-04 16:38:44 +0000 | [diff] [blame] | 398 | /* |
| 399 | ** Shift it in on the low end, and see if there's |
| 400 | ** a byte ready for output. |
| 401 | */ |
Guido van Rossum | 2db4f47 | 1999-10-19 19:05:14 +0000 | [diff] [blame] | 402 | quad_pos = (quad_pos + 1) & 0x03; |
Jack Jansen | 84bbc2e | 1995-10-04 16:38:44 +0000 | [diff] [blame] | 403 | leftchar = (leftchar << 6) | (this_ch); |
| 404 | leftbits += 6; |
Guido van Rossum | 2db4f47 | 1999-10-19 19:05:14 +0000 | [diff] [blame] | 405 | |
Jack Jansen | 84bbc2e | 1995-10-04 16:38:44 +0000 | [diff] [blame] | 406 | if ( leftbits >= 8 ) { |
| 407 | leftbits -= 8; |
| 408 | *bin_data++ = (leftchar >> leftbits) & 0xff; |
Jack Jansen | 84bbc2e | 1995-10-04 16:38:44 +0000 | [diff] [blame] | 409 | bin_len++; |
Guido van Rossum | 2db4f47 | 1999-10-19 19:05:14 +0000 | [diff] [blame] | 410 | leftchar &= ((1 << leftbits) - 1); |
Jack Jansen | 84bbc2e | 1995-10-04 16:38:44 +0000 | [diff] [blame] | 411 | } |
Guido van Rossum | 2db4f47 | 1999-10-19 19:05:14 +0000 | [diff] [blame] | 412 | } |
| 413 | |
| 414 | if (leftbits != 0) { |
Jack Jansen | 84bbc2e | 1995-10-04 16:38:44 +0000 | [diff] [blame] | 415 | PyErr_SetString(Error, "Incorrect padding"); |
| 416 | Py_DECREF(rv); |
| 417 | return NULL; |
| 418 | } |
Guido van Rossum | 2db4f47 | 1999-10-19 19:05:14 +0000 | [diff] [blame] | 419 | |
Thomas Wouters | 9e1c192 | 2003-03-17 11:24:29 +0000 | [diff] [blame] | 420 | /* And set string size correctly. If the result string is empty |
| 421 | ** (because the input was all invalid) return the shared empty |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame^] | 422 | ** string instead; _PyBytes_Resize() won't do this for us. |
Thomas Wouters | 9e1c192 | 2003-03-17 11:24:29 +0000 | [diff] [blame] | 423 | */ |
Guido van Rossum | 0e225aa | 2007-05-22 20:24:57 +0000 | [diff] [blame] | 424 | if (bin_len > 0) { |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame^] | 425 | if (_PyBytes_Resize(&rv, bin_len) < 0) { |
Guido van Rossum | 0e225aa | 2007-05-22 20:24:57 +0000 | [diff] [blame] | 426 | Py_DECREF(rv); |
| 427 | rv = NULL; |
| 428 | } |
| 429 | } |
Thomas Wouters | 9e1c192 | 2003-03-17 11:24:29 +0000 | [diff] [blame] | 430 | else { |
| 431 | Py_DECREF(rv); |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame^] | 432 | rv = PyBytes_FromStringAndSize("", 0); |
Thomas Wouters | 9e1c192 | 2003-03-17 11:24:29 +0000 | [diff] [blame] | 433 | } |
Jack Jansen | 84bbc2e | 1995-10-04 16:38:44 +0000 | [diff] [blame] | 434 | return rv; |
| 435 | } |
| 436 | |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 437 | PyDoc_STRVAR(doc_b2a_base64, "(bin) -> ascii. Base64-code line of data"); |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 438 | |
Jack Jansen | 84bbc2e | 1995-10-04 16:38:44 +0000 | [diff] [blame] | 439 | static PyObject * |
Peter Schneider-Kamp | a788a7f | 2000-07-10 09:57:19 +0000 | [diff] [blame] | 440 | binascii_b2a_base64(PyObject *self, PyObject *args) |
Jack Jansen | 84bbc2e | 1995-10-04 16:38:44 +0000 | [diff] [blame] | 441 | { |
| 442 | unsigned char *ascii_data, *bin_data; |
| 443 | int leftbits = 0; |
| 444 | unsigned char this_ch; |
| 445 | unsigned int leftchar = 0; |
| 446 | PyObject *rv; |
Thomas Wouters | f98db65 | 2006-03-01 21:37:32 +0000 | [diff] [blame] | 447 | Py_ssize_t bin_len; |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 448 | |
Guido van Rossum | 43713e5 | 2000-02-29 13:59:29 +0000 | [diff] [blame] | 449 | if ( !PyArg_ParseTuple(args, "s#:b2a_base64", &bin_data, &bin_len) ) |
Jack Jansen | 84bbc2e | 1995-10-04 16:38:44 +0000 | [diff] [blame] | 450 | return NULL; |
| 451 | if ( bin_len > BASE64_MAXBIN ) { |
| 452 | PyErr_SetString(Error, "Too much data for base64 line"); |
| 453 | return NULL; |
| 454 | } |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 455 | |
Tim Peters | 1fbb577 | 2001-12-19 04:41:35 +0000 | [diff] [blame] | 456 | /* We're lazy and allocate too much (fixed up later). |
| 457 | "+3" leaves room for up to two pad characters and a trailing |
| 458 | newline. Note that 'b' gets encoded as 'Yg==\n' (1 in, 5 out). */ |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame^] | 459 | if ( (rv=PyBytes_FromStringAndSize(NULL, bin_len*2 + 3)) == NULL ) |
Jack Jansen | 84bbc2e | 1995-10-04 16:38:44 +0000 | [diff] [blame] | 460 | return NULL; |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame^] | 461 | ascii_data = (unsigned char *)PyBytes_AS_STRING(rv); |
Jack Jansen | 84bbc2e | 1995-10-04 16:38:44 +0000 | [diff] [blame] | 462 | |
| 463 | for( ; bin_len > 0 ; bin_len--, bin_data++ ) { |
| 464 | /* Shift the data into our buffer */ |
| 465 | leftchar = (leftchar << 8) | *bin_data; |
| 466 | leftbits += 8; |
| 467 | |
| 468 | /* See if there are 6-bit groups ready */ |
| 469 | while ( leftbits >= 6 ) { |
| 470 | this_ch = (leftchar >> (leftbits-6)) & 0x3f; |
| 471 | leftbits -= 6; |
| 472 | *ascii_data++ = table_b2a_base64[this_ch]; |
| 473 | } |
| 474 | } |
| 475 | if ( leftbits == 2 ) { |
| 476 | *ascii_data++ = table_b2a_base64[(leftchar&3) << 4]; |
| 477 | *ascii_data++ = BASE64_PAD; |
| 478 | *ascii_data++ = BASE64_PAD; |
| 479 | } else if ( leftbits == 4 ) { |
| 480 | *ascii_data++ = table_b2a_base64[(leftchar&0xf) << 2]; |
| 481 | *ascii_data++ = BASE64_PAD; |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 482 | } |
Jack Jansen | 84bbc2e | 1995-10-04 16:38:44 +0000 | [diff] [blame] | 483 | *ascii_data++ = '\n'; /* Append a courtesy newline */ |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 484 | |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame^] | 485 | if (_PyBytes_Resize(&rv, |
Guido van Rossum | 0e225aa | 2007-05-22 20:24:57 +0000 | [diff] [blame] | 486 | (ascii_data - |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame^] | 487 | (unsigned char *)PyBytes_AS_STRING(rv))) < 0) { |
Guido van Rossum | 0e225aa | 2007-05-22 20:24:57 +0000 | [diff] [blame] | 488 | Py_DECREF(rv); |
| 489 | rv = NULL; |
| 490 | } |
Jack Jansen | 84bbc2e | 1995-10-04 16:38:44 +0000 | [diff] [blame] | 491 | return rv; |
| 492 | } |
| 493 | |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 494 | PyDoc_STRVAR(doc_a2b_hqx, "ascii -> bin, done. Decode .hqx coding"); |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 495 | |
| 496 | static PyObject * |
Peter Schneider-Kamp | a788a7f | 2000-07-10 09:57:19 +0000 | [diff] [blame] | 497 | binascii_a2b_hqx(PyObject *self, PyObject *args) |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 498 | { |
| 499 | unsigned char *ascii_data, *bin_data; |
| 500 | int leftbits = 0; |
| 501 | unsigned char this_ch; |
Jack Jansen | eaeb1c8 | 1995-08-14 12:17:57 +0000 | [diff] [blame] | 502 | unsigned int leftchar = 0; |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 503 | PyObject *rv; |
Thomas Wouters | f98db65 | 2006-03-01 21:37:32 +0000 | [diff] [blame] | 504 | Py_ssize_t len; |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 505 | int done = 0; |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 506 | |
Guido van Rossum | 43713e5 | 2000-02-29 13:59:29 +0000 | [diff] [blame] | 507 | if ( !PyArg_ParseTuple(args, "t#:a2b_hqx", &ascii_data, &len) ) |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 508 | return NULL; |
| 509 | |
Raymond Hettinger | 658717e | 2004-09-06 22:58:37 +0000 | [diff] [blame] | 510 | /* Allocate a string that is too big (fixed later) |
| 511 | Add two to the initial length to prevent interning which |
| 512 | would preclude subsequent resizing. */ |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame^] | 513 | if ( (rv=PyBytes_FromStringAndSize(NULL, len+2)) == NULL ) |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 514 | return NULL; |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame^] | 515 | bin_data = (unsigned char *)PyBytes_AS_STRING(rv); |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 516 | |
| 517 | for( ; len > 0 ; len--, ascii_data++ ) { |
| 518 | /* Get the byte and look it up */ |
| 519 | this_ch = table_a2b_hqx[*ascii_data]; |
| 520 | if ( this_ch == SKIP ) |
| 521 | continue; |
| 522 | if ( this_ch == FAIL ) { |
| 523 | PyErr_SetString(Error, "Illegal char"); |
| 524 | Py_DECREF(rv); |
| 525 | return NULL; |
| 526 | } |
| 527 | if ( this_ch == DONE ) { |
| 528 | /* The terminating colon */ |
| 529 | done = 1; |
| 530 | break; |
| 531 | } |
| 532 | |
| 533 | /* Shift it into the buffer and see if any bytes are ready */ |
| 534 | leftchar = (leftchar << 6) | (this_ch); |
| 535 | leftbits += 6; |
| 536 | if ( leftbits >= 8 ) { |
| 537 | leftbits -= 8; |
| 538 | *bin_data++ = (leftchar >> leftbits) & 0xff; |
| 539 | leftchar &= ((1 << leftbits) - 1); |
| 540 | } |
| 541 | } |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 542 | |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 543 | if ( leftbits && !done ) { |
| 544 | PyErr_SetString(Incomplete, |
| 545 | "String has incomplete number of bytes"); |
| 546 | Py_DECREF(rv); |
| 547 | return NULL; |
| 548 | } |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame^] | 549 | if (_PyBytes_Resize(&rv, |
Guido van Rossum | 0e225aa | 2007-05-22 20:24:57 +0000 | [diff] [blame] | 550 | (bin_data - |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame^] | 551 | (unsigned char *)PyBytes_AS_STRING(rv))) < 0) { |
Guido van Rossum | 0e225aa | 2007-05-22 20:24:57 +0000 | [diff] [blame] | 552 | Py_DECREF(rv); |
| 553 | rv = NULL; |
| 554 | } |
Guido van Rossum | 9c6ba5e | 1997-01-12 20:02:04 +0000 | [diff] [blame] | 555 | if (rv) { |
| 556 | PyObject *rrv = Py_BuildValue("Oi", rv, done); |
| 557 | Py_DECREF(rv); |
| 558 | return rrv; |
| 559 | } |
Roger E. Masse | 5f4ce18 | 1997-01-16 17:10:22 +0000 | [diff] [blame] | 560 | |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 561 | return NULL; |
| 562 | } |
| 563 | |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 564 | PyDoc_STRVAR(doc_rlecode_hqx, "Binhex RLE-code binary data"); |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 565 | |
| 566 | static PyObject * |
Peter Schneider-Kamp | a788a7f | 2000-07-10 09:57:19 +0000 | [diff] [blame] | 567 | binascii_rlecode_hqx(PyObject *self, PyObject *args) |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 568 | { |
| 569 | unsigned char *in_data, *out_data; |
| 570 | PyObject *rv; |
| 571 | unsigned char ch; |
Thomas Wouters | f98db65 | 2006-03-01 21:37:32 +0000 | [diff] [blame] | 572 | Py_ssize_t in, inend, len; |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 573 | |
Guido van Rossum | 43713e5 | 2000-02-29 13:59:29 +0000 | [diff] [blame] | 574 | if ( !PyArg_ParseTuple(args, "s#:rlecode_hqx", &in_data, &len) ) |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 575 | return NULL; |
| 576 | |
| 577 | /* Worst case: output is twice as big as input (fixed later) */ |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame^] | 578 | if ( (rv=PyBytes_FromStringAndSize(NULL, len*2+2)) == NULL ) |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 579 | return NULL; |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame^] | 580 | out_data = (unsigned char *)PyBytes_AS_STRING(rv); |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 581 | |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 582 | for( in=0; in<len; in++) { |
| 583 | ch = in_data[in]; |
| 584 | if ( ch == RUNCHAR ) { |
| 585 | /* RUNCHAR. Escape it. */ |
| 586 | *out_data++ = RUNCHAR; |
| 587 | *out_data++ = 0; |
| 588 | } else { |
| 589 | /* Check how many following are the same */ |
| 590 | for(inend=in+1; |
| 591 | inend<len && in_data[inend] == ch && |
Roger E. Masse | 5f4ce18 | 1997-01-16 17:10:22 +0000 | [diff] [blame] | 592 | inend < in+255; |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 593 | inend++) ; |
Jack Jansen | 0223aa1 | 1995-08-31 13:44:23 +0000 | [diff] [blame] | 594 | if ( inend - in > 3 ) { |
| 595 | /* More than 3 in a row. Output RLE. */ |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 596 | *out_data++ = ch; |
| 597 | *out_data++ = RUNCHAR; |
| 598 | *out_data++ = inend-in; |
| 599 | in = inend-1; |
| 600 | } else { |
| 601 | /* Less than 3. Output the byte itself */ |
| 602 | *out_data++ = ch; |
| 603 | } |
| 604 | } |
| 605 | } |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame^] | 606 | if (_PyBytes_Resize(&rv, |
Guido van Rossum | 0e225aa | 2007-05-22 20:24:57 +0000 | [diff] [blame] | 607 | (out_data - |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame^] | 608 | (unsigned char *)PyBytes_AS_STRING(rv))) < 0) { |
Guido van Rossum | 0e225aa | 2007-05-22 20:24:57 +0000 | [diff] [blame] | 609 | Py_DECREF(rv); |
| 610 | rv = NULL; |
| 611 | } |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 612 | return rv; |
| 613 | } |
| 614 | |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 615 | PyDoc_STRVAR(doc_b2a_hqx, "Encode .hqx data"); |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 616 | |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 617 | static PyObject * |
Peter Schneider-Kamp | a788a7f | 2000-07-10 09:57:19 +0000 | [diff] [blame] | 618 | binascii_b2a_hqx(PyObject *self, PyObject *args) |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 619 | { |
| 620 | unsigned char *ascii_data, *bin_data; |
| 621 | int leftbits = 0; |
| 622 | unsigned char this_ch; |
Jack Jansen | eaeb1c8 | 1995-08-14 12:17:57 +0000 | [diff] [blame] | 623 | unsigned int leftchar = 0; |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 624 | PyObject *rv; |
Thomas Wouters | f98db65 | 2006-03-01 21:37:32 +0000 | [diff] [blame] | 625 | Py_ssize_t len; |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 626 | |
Guido van Rossum | 43713e5 | 2000-02-29 13:59:29 +0000 | [diff] [blame] | 627 | if ( !PyArg_ParseTuple(args, "s#:b2a_hqx", &bin_data, &len) ) |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 628 | return NULL; |
| 629 | |
| 630 | /* Allocate a buffer that is at least large enough */ |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame^] | 631 | if ( (rv=PyBytes_FromStringAndSize(NULL, len*2+2)) == NULL ) |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 632 | return NULL; |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame^] | 633 | ascii_data = (unsigned char *)PyBytes_AS_STRING(rv); |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 634 | |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 635 | for( ; len > 0 ; len--, bin_data++ ) { |
| 636 | /* Shift into our buffer, and output any 6bits ready */ |
| 637 | leftchar = (leftchar << 8) | *bin_data; |
| 638 | leftbits += 8; |
| 639 | while ( leftbits >= 6 ) { |
| 640 | this_ch = (leftchar >> (leftbits-6)) & 0x3f; |
| 641 | leftbits -= 6; |
| 642 | *ascii_data++ = table_b2a_hqx[this_ch]; |
| 643 | } |
| 644 | } |
| 645 | /* Output a possible runt byte */ |
| 646 | if ( leftbits ) { |
| 647 | leftchar <<= (6-leftbits); |
| 648 | *ascii_data++ = table_b2a_hqx[leftchar & 0x3f]; |
| 649 | } |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame^] | 650 | if (_PyBytes_Resize(&rv, |
Guido van Rossum | 0e225aa | 2007-05-22 20:24:57 +0000 | [diff] [blame] | 651 | (ascii_data - |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame^] | 652 | (unsigned char *)PyBytes_AS_STRING(rv))) < 0) { |
Guido van Rossum | 0e225aa | 2007-05-22 20:24:57 +0000 | [diff] [blame] | 653 | Py_DECREF(rv); |
| 654 | rv = NULL; |
| 655 | } |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 656 | return rv; |
| 657 | } |
| 658 | |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 659 | PyDoc_STRVAR(doc_rledecode_hqx, "Decode hexbin RLE-coded string"); |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 660 | |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 661 | static PyObject * |
Peter Schneider-Kamp | a788a7f | 2000-07-10 09:57:19 +0000 | [diff] [blame] | 662 | binascii_rledecode_hqx(PyObject *self, PyObject *args) |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 663 | { |
| 664 | unsigned char *in_data, *out_data; |
| 665 | unsigned char in_byte, in_repeat; |
| 666 | PyObject *rv; |
Thomas Wouters | f98db65 | 2006-03-01 21:37:32 +0000 | [diff] [blame] | 667 | Py_ssize_t in_len, out_len, out_len_left; |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 668 | |
Guido van Rossum | 43713e5 | 2000-02-29 13:59:29 +0000 | [diff] [blame] | 669 | if ( !PyArg_ParseTuple(args, "s#:rledecode_hqx", &in_data, &in_len) ) |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 670 | return NULL; |
| 671 | |
| 672 | /* Empty string is a special case */ |
| 673 | if ( in_len == 0 ) |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame^] | 674 | return PyBytes_FromStringAndSize("", 0); |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 675 | |
| 676 | /* Allocate a buffer of reasonable size. Resized when needed */ |
| 677 | out_len = in_len*2; |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame^] | 678 | if ( (rv=PyBytes_FromStringAndSize(NULL, out_len)) == NULL ) |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 679 | return NULL; |
| 680 | out_len_left = out_len; |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame^] | 681 | out_data = (unsigned char *)PyBytes_AS_STRING(rv); |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 682 | |
| 683 | /* |
| 684 | ** We need two macros here to get/put bytes and handle |
| 685 | ** end-of-buffer for input and output strings. |
| 686 | */ |
| 687 | #define INBYTE(b) \ |
Roger E. Masse | 5f4ce18 | 1997-01-16 17:10:22 +0000 | [diff] [blame] | 688 | do { \ |
| 689 | if ( --in_len < 0 ) { \ |
| 690 | PyErr_SetString(Incomplete, ""); \ |
| 691 | Py_DECREF(rv); \ |
| 692 | return NULL; \ |
| 693 | } \ |
| 694 | b = *in_data++; \ |
| 695 | } while(0) |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 696 | |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 697 | #define OUTBYTE(b) \ |
Roger E. Masse | 5f4ce18 | 1997-01-16 17:10:22 +0000 | [diff] [blame] | 698 | do { \ |
| 699 | if ( --out_len_left < 0 ) { \ |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame^] | 700 | if (_PyBytes_Resize(&rv, 2*out_len) < 0) \ |
Guido van Rossum | 0e225aa | 2007-05-22 20:24:57 +0000 | [diff] [blame] | 701 | { Py_DECREF(rv); return NULL; } \ |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame^] | 702 | out_data = (unsigned char *)PyBytes_AS_STRING(rv) \ |
Roger E. Masse | 5f4ce18 | 1997-01-16 17:10:22 +0000 | [diff] [blame] | 703 | + out_len; \ |
| 704 | out_len_left = out_len-1; \ |
| 705 | out_len = out_len * 2; \ |
| 706 | } \ |
| 707 | *out_data++ = b; \ |
| 708 | } while(0) |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 709 | |
Roger E. Masse | 5f4ce18 | 1997-01-16 17:10:22 +0000 | [diff] [blame] | 710 | /* |
| 711 | ** Handle first byte separately (since we have to get angry |
| 712 | ** in case of an orphaned RLE code). |
| 713 | */ |
| 714 | INBYTE(in_byte); |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 715 | |
| 716 | if (in_byte == RUNCHAR) { |
| 717 | INBYTE(in_repeat); |
| 718 | if (in_repeat != 0) { |
| 719 | /* Note Error, not Incomplete (which is at the end |
| 720 | ** of the string only). This is a programmer error. |
| 721 | */ |
| 722 | PyErr_SetString(Error, "Orphaned RLE code at start"); |
| 723 | Py_DECREF(rv); |
| 724 | return NULL; |
| 725 | } |
| 726 | OUTBYTE(RUNCHAR); |
| 727 | } else { |
| 728 | OUTBYTE(in_byte); |
| 729 | } |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 730 | |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 731 | while( in_len > 0 ) { |
| 732 | INBYTE(in_byte); |
| 733 | |
| 734 | if (in_byte == RUNCHAR) { |
| 735 | INBYTE(in_repeat); |
| 736 | if ( in_repeat == 0 ) { |
| 737 | /* Just an escaped RUNCHAR value */ |
| 738 | OUTBYTE(RUNCHAR); |
| 739 | } else { |
| 740 | /* Pick up value and output a sequence of it */ |
| 741 | in_byte = out_data[-1]; |
| 742 | while ( --in_repeat > 0 ) |
| 743 | OUTBYTE(in_byte); |
| 744 | } |
| 745 | } else { |
| 746 | /* Normal byte */ |
| 747 | OUTBYTE(in_byte); |
| 748 | } |
| 749 | } |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame^] | 750 | if (_PyBytes_Resize(&rv, |
Guido van Rossum | 0e225aa | 2007-05-22 20:24:57 +0000 | [diff] [blame] | 751 | (out_data - |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame^] | 752 | (unsigned char *)PyBytes_AS_STRING(rv))) < 0) { |
Guido van Rossum | 0e225aa | 2007-05-22 20:24:57 +0000 | [diff] [blame] | 753 | Py_DECREF(rv); |
| 754 | rv = NULL; |
| 755 | } |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 756 | return rv; |
| 757 | } |
| 758 | |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 759 | PyDoc_STRVAR(doc_crc_hqx, |
| 760 | "(data, oldcrc) -> newcrc. Compute hqx CRC incrementally"); |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 761 | |
| 762 | static PyObject * |
Peter Schneider-Kamp | a788a7f | 2000-07-10 09:57:19 +0000 | [diff] [blame] | 763 | binascii_crc_hqx(PyObject *self, PyObject *args) |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 764 | { |
| 765 | unsigned char *bin_data; |
| 766 | unsigned int crc; |
Thomas Wouters | f98db65 | 2006-03-01 21:37:32 +0000 | [diff] [blame] | 767 | Py_ssize_t len; |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 768 | |
Guido van Rossum | 43713e5 | 2000-02-29 13:59:29 +0000 | [diff] [blame] | 769 | if ( !PyArg_ParseTuple(args, "s#i:crc_hqx", &bin_data, &len, &crc) ) |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 770 | return NULL; |
| 771 | |
| 772 | while(len--) { |
| 773 | crc=((crc<<8)&0xff00)^crctab_hqx[((crc>>8)&0xff)^*bin_data++]; |
| 774 | } |
| 775 | |
| 776 | return Py_BuildValue("i", crc); |
| 777 | } |
| 778 | |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 779 | PyDoc_STRVAR(doc_crc32, |
| 780 | "(data, oldcrc = 0) -> newcrc. Compute CRC-32 incrementally"); |
Guido van Rossum | 7d47c9e | 2000-02-16 21:11:52 +0000 | [diff] [blame] | 781 | |
Christian Heimes | 1dc5400 | 2008-03-24 02:19:29 +0000 | [diff] [blame] | 782 | #ifdef USE_ZLIB_CRC32 |
| 783 | /* This was taken from zlibmodule.c PyZlib_crc32 (but is PY_SSIZE_T_CLEAN) */ |
| 784 | static PyObject * |
| 785 | binascii_crc32(PyObject *self, PyObject *args) |
| 786 | { |
Christian Heimes | cc47b05 | 2008-03-25 14:56:36 +0000 | [diff] [blame] | 787 | unsigned int crc32val = 0; /* crc32(0L, Z_NULL, 0) */ |
Christian Heimes | 1dc5400 | 2008-03-24 02:19:29 +0000 | [diff] [blame] | 788 | Byte *buf; |
Neal Norwitz | 4027bf8 | 2008-03-24 04:59:05 +0000 | [diff] [blame] | 789 | Py_ssize_t len; |
Christian Heimes | cc47b05 | 2008-03-25 14:56:36 +0000 | [diff] [blame] | 790 | int signed_val; |
| 791 | |
Christian Heimes | 1dc5400 | 2008-03-24 02:19:29 +0000 | [diff] [blame] | 792 | if (!PyArg_ParseTuple(args, "s#|I:crc32", &buf, &len, &crc32val)) |
| 793 | return NULL; |
Christian Heimes | cc47b05 | 2008-03-25 14:56:36 +0000 | [diff] [blame] | 794 | signed_val = crc32(crc32val, buf, len); |
| 795 | return PyLong_FromUnsignedLong(signed_val & 0xffffffffU); |
Christian Heimes | 1dc5400 | 2008-03-24 02:19:29 +0000 | [diff] [blame] | 796 | } |
| 797 | #else /* USE_ZLIB_CRC32 */ |
Guido van Rossum | 7d47c9e | 2000-02-16 21:11:52 +0000 | [diff] [blame] | 798 | /* Crc - 32 BIT ANSI X3.66 CRC checksum files |
| 799 | Also known as: ISO 3307 |
| 800 | **********************************************************************| |
| 801 | * *| |
| 802 | * Demonstration program to compute the 32-bit CRC used as the frame *| |
| 803 | * check sequence in ADCCP (ANSI X3.66, also known as FIPS PUB 71 *| |
| 804 | * and FED-STD-1003, the U.S. versions of CCITT's X.25 link-level *| |
| 805 | * protocol). The 32-bit FCS was added via the Federal Register, *| |
| 806 | * 1 June 1982, p.23798. I presume but don't know for certain that *| |
| 807 | * this polynomial is or will be included in CCITT V.41, which *| |
| 808 | * defines the 16-bit CRC (often called CRC-CCITT) polynomial. FIPS *| |
| 809 | * PUB 78 says that the 32-bit FCS reduces otherwise undetected *| |
| 810 | * errors by a factor of 10^-5 over 16-bit FCS. *| |
| 811 | * *| |
| 812 | **********************************************************************| |
| 813 | |
| 814 | Copyright (C) 1986 Gary S. Brown. You may use this program, or |
| 815 | code or tables extracted from it, as desired without restriction. |
Guido van Rossum | 7d47c9e | 2000-02-16 21:11:52 +0000 | [diff] [blame] | 816 | |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 817 | First, the polynomial itself and its table of feedback terms. The |
| 818 | polynomial is |
| 819 | X^32+X^26+X^23+X^22+X^16+X^12+X^11+X^10+X^8+X^7+X^5+X^4+X^2+X^1+X^0 |
| 820 | Note that we take it "backwards" and put the highest-order term in |
| 821 | the lowest-order bit. The X^32 term is "implied"; the LSB is the |
| 822 | X^31 term, etc. The X^0 term (usually shown as "+1") results in |
| 823 | the MSB being 1. |
Guido van Rossum | 7d47c9e | 2000-02-16 21:11:52 +0000 | [diff] [blame] | 824 | |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 825 | Note that the usual hardware shift register implementation, which |
| 826 | is what we're using (we're merely optimizing it by doing eight-bit |
| 827 | chunks at a time) shifts bits into the lowest-order term. In our |
| 828 | implementation, that means shifting towards the right. Why do we |
| 829 | do it this way? Because the calculated CRC must be transmitted in |
| 830 | order from highest-order term to lowest-order term. UARTs transmit |
| 831 | characters in order from LSB to MSB. By storing the CRC this way, |
| 832 | we hand it to the UART in the order low-byte to high-byte; the UART |
| 833 | sends each low-bit to hight-bit; and the result is transmission bit |
| 834 | by bit from highest- to lowest-order term without requiring any bit |
| 835 | shuffling on our part. Reception works similarly. |
| 836 | |
| 837 | The feedback terms table consists of 256, 32-bit entries. Notes: |
| 838 | |
| 839 | 1. The table can be generated at runtime if desired; code to do so |
| 840 | is shown later. It might not be obvious, but the feedback |
| 841 | terms simply represent the results of eight shift/xor opera- |
| 842 | tions for all combinations of data and CRC register values. |
| 843 | |
| 844 | 2. The CRC accumulation logic is the same for all CRC polynomials, |
| 845 | be they sixteen or thirty-two bits wide. You simply choose the |
| 846 | appropriate table. Alternatively, because the table can be |
| 847 | generated at runtime, you can start by generating the table for |
| 848 | the polynomial in question and use exactly the same "updcrc", |
| 849 | if your application needn't simultaneously handle two CRC |
| 850 | polynomials. (Note, however, that XMODEM is strange.) |
| 851 | |
| 852 | 3. For 16-bit CRCs, the table entries need be only 16 bits wide; |
| 853 | of course, 32-bit entries work OK if the high 16 bits are zero. |
| 854 | |
| 855 | 4. The values must be right-shifted by eight bits by the "updcrc" |
| 856 | logic; the shift must be unsigned (bring in zeroes). On some |
| 857 | hardware you could probably optimize the shift in assembler by |
| 858 | using byte-swap instructions. |
Guido van Rossum | 7d47c9e | 2000-02-16 21:11:52 +0000 | [diff] [blame] | 859 | ********************************************************************/ |
| 860 | |
Gregory P. Smith | 3c0e4d2 | 2008-03-25 07:51:12 +0000 | [diff] [blame] | 861 | static unsigned int crc_32_tab[256] = { |
| 862 | 0x00000000U, 0x77073096U, 0xee0e612cU, 0x990951baU, 0x076dc419U, |
| 863 | 0x706af48fU, 0xe963a535U, 0x9e6495a3U, 0x0edb8832U, 0x79dcb8a4U, |
| 864 | 0xe0d5e91eU, 0x97d2d988U, 0x09b64c2bU, 0x7eb17cbdU, 0xe7b82d07U, |
| 865 | 0x90bf1d91U, 0x1db71064U, 0x6ab020f2U, 0xf3b97148U, 0x84be41deU, |
| 866 | 0x1adad47dU, 0x6ddde4ebU, 0xf4d4b551U, 0x83d385c7U, 0x136c9856U, |
| 867 | 0x646ba8c0U, 0xfd62f97aU, 0x8a65c9ecU, 0x14015c4fU, 0x63066cd9U, |
| 868 | 0xfa0f3d63U, 0x8d080df5U, 0x3b6e20c8U, 0x4c69105eU, 0xd56041e4U, |
| 869 | 0xa2677172U, 0x3c03e4d1U, 0x4b04d447U, 0xd20d85fdU, 0xa50ab56bU, |
| 870 | 0x35b5a8faU, 0x42b2986cU, 0xdbbbc9d6U, 0xacbcf940U, 0x32d86ce3U, |
| 871 | 0x45df5c75U, 0xdcd60dcfU, 0xabd13d59U, 0x26d930acU, 0x51de003aU, |
| 872 | 0xc8d75180U, 0xbfd06116U, 0x21b4f4b5U, 0x56b3c423U, 0xcfba9599U, |
| 873 | 0xb8bda50fU, 0x2802b89eU, 0x5f058808U, 0xc60cd9b2U, 0xb10be924U, |
| 874 | 0x2f6f7c87U, 0x58684c11U, 0xc1611dabU, 0xb6662d3dU, 0x76dc4190U, |
| 875 | 0x01db7106U, 0x98d220bcU, 0xefd5102aU, 0x71b18589U, 0x06b6b51fU, |
| 876 | 0x9fbfe4a5U, 0xe8b8d433U, 0x7807c9a2U, 0x0f00f934U, 0x9609a88eU, |
| 877 | 0xe10e9818U, 0x7f6a0dbbU, 0x086d3d2dU, 0x91646c97U, 0xe6635c01U, |
| 878 | 0x6b6b51f4U, 0x1c6c6162U, 0x856530d8U, 0xf262004eU, 0x6c0695edU, |
| 879 | 0x1b01a57bU, 0x8208f4c1U, 0xf50fc457U, 0x65b0d9c6U, 0x12b7e950U, |
| 880 | 0x8bbeb8eaU, 0xfcb9887cU, 0x62dd1ddfU, 0x15da2d49U, 0x8cd37cf3U, |
| 881 | 0xfbd44c65U, 0x4db26158U, 0x3ab551ceU, 0xa3bc0074U, 0xd4bb30e2U, |
| 882 | 0x4adfa541U, 0x3dd895d7U, 0xa4d1c46dU, 0xd3d6f4fbU, 0x4369e96aU, |
| 883 | 0x346ed9fcU, 0xad678846U, 0xda60b8d0U, 0x44042d73U, 0x33031de5U, |
| 884 | 0xaa0a4c5fU, 0xdd0d7cc9U, 0x5005713cU, 0x270241aaU, 0xbe0b1010U, |
| 885 | 0xc90c2086U, 0x5768b525U, 0x206f85b3U, 0xb966d409U, 0xce61e49fU, |
| 886 | 0x5edef90eU, 0x29d9c998U, 0xb0d09822U, 0xc7d7a8b4U, 0x59b33d17U, |
| 887 | 0x2eb40d81U, 0xb7bd5c3bU, 0xc0ba6cadU, 0xedb88320U, 0x9abfb3b6U, |
| 888 | 0x03b6e20cU, 0x74b1d29aU, 0xead54739U, 0x9dd277afU, 0x04db2615U, |
| 889 | 0x73dc1683U, 0xe3630b12U, 0x94643b84U, 0x0d6d6a3eU, 0x7a6a5aa8U, |
| 890 | 0xe40ecf0bU, 0x9309ff9dU, 0x0a00ae27U, 0x7d079eb1U, 0xf00f9344U, |
| 891 | 0x8708a3d2U, 0x1e01f268U, 0x6906c2feU, 0xf762575dU, 0x806567cbU, |
| 892 | 0x196c3671U, 0x6e6b06e7U, 0xfed41b76U, 0x89d32be0U, 0x10da7a5aU, |
| 893 | 0x67dd4accU, 0xf9b9df6fU, 0x8ebeeff9U, 0x17b7be43U, 0x60b08ed5U, |
| 894 | 0xd6d6a3e8U, 0xa1d1937eU, 0x38d8c2c4U, 0x4fdff252U, 0xd1bb67f1U, |
| 895 | 0xa6bc5767U, 0x3fb506ddU, 0x48b2364bU, 0xd80d2bdaU, 0xaf0a1b4cU, |
| 896 | 0x36034af6U, 0x41047a60U, 0xdf60efc3U, 0xa867df55U, 0x316e8eefU, |
| 897 | 0x4669be79U, 0xcb61b38cU, 0xbc66831aU, 0x256fd2a0U, 0x5268e236U, |
| 898 | 0xcc0c7795U, 0xbb0b4703U, 0x220216b9U, 0x5505262fU, 0xc5ba3bbeU, |
| 899 | 0xb2bd0b28U, 0x2bb45a92U, 0x5cb36a04U, 0xc2d7ffa7U, 0xb5d0cf31U, |
| 900 | 0x2cd99e8bU, 0x5bdeae1dU, 0x9b64c2b0U, 0xec63f226U, 0x756aa39cU, |
| 901 | 0x026d930aU, 0x9c0906a9U, 0xeb0e363fU, 0x72076785U, 0x05005713U, |
| 902 | 0x95bf4a82U, 0xe2b87a14U, 0x7bb12baeU, 0x0cb61b38U, 0x92d28e9bU, |
| 903 | 0xe5d5be0dU, 0x7cdcefb7U, 0x0bdbdf21U, 0x86d3d2d4U, 0xf1d4e242U, |
| 904 | 0x68ddb3f8U, 0x1fda836eU, 0x81be16cdU, 0xf6b9265bU, 0x6fb077e1U, |
| 905 | 0x18b74777U, 0x88085ae6U, 0xff0f6a70U, 0x66063bcaU, 0x11010b5cU, |
| 906 | 0x8f659effU, 0xf862ae69U, 0x616bffd3U, 0x166ccf45U, 0xa00ae278U, |
| 907 | 0xd70dd2eeU, 0x4e048354U, 0x3903b3c2U, 0xa7672661U, 0xd06016f7U, |
| 908 | 0x4969474dU, 0x3e6e77dbU, 0xaed16a4aU, 0xd9d65adcU, 0x40df0b66U, |
| 909 | 0x37d83bf0U, 0xa9bcae53U, 0xdebb9ec5U, 0x47b2cf7fU, 0x30b5ffe9U, |
| 910 | 0xbdbdf21cU, 0xcabac28aU, 0x53b39330U, 0x24b4a3a6U, 0xbad03605U, |
| 911 | 0xcdd70693U, 0x54de5729U, 0x23d967bfU, 0xb3667a2eU, 0xc4614ab8U, |
| 912 | 0x5d681b02U, 0x2a6f2b94U, 0xb40bbe37U, 0xc30c8ea1U, 0x5a05df1bU, |
| 913 | 0x2d02ef8dU |
Guido van Rossum | 7d47c9e | 2000-02-16 21:11:52 +0000 | [diff] [blame] | 914 | }; |
| 915 | |
| 916 | static PyObject * |
Peter Schneider-Kamp | a788a7f | 2000-07-10 09:57:19 +0000 | [diff] [blame] | 917 | binascii_crc32(PyObject *self, PyObject *args) |
Guido van Rossum | 7d47c9e | 2000-02-16 21:11:52 +0000 | [diff] [blame] | 918 | { /* By Jim Ahlstrom; All rights transferred to CNRI */ |
| 919 | unsigned char *bin_data; |
Gregory P. Smith | 2727503 | 2008-03-20 06:20:09 +0000 | [diff] [blame] | 920 | unsigned int crc = 0; /* initial value of CRC */ |
Thomas Wouters | f98db65 | 2006-03-01 21:37:32 +0000 | [diff] [blame] | 921 | Py_ssize_t len; |
Gregory P. Smith | 2727503 | 2008-03-20 06:20:09 +0000 | [diff] [blame] | 922 | unsigned int result; |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 923 | |
Gregory P. Smith | 2727503 | 2008-03-20 06:20:09 +0000 | [diff] [blame] | 924 | if ( !PyArg_ParseTuple(args, "s#|I:crc32", &bin_data, &len, &crc) ) |
Guido van Rossum | 7d47c9e | 2000-02-16 21:11:52 +0000 | [diff] [blame] | 925 | return NULL; |
| 926 | |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 927 | crc = ~ crc; |
Gregory P. Smith | 2727503 | 2008-03-20 06:20:09 +0000 | [diff] [blame] | 928 | while (len--) { |
| 929 | crc = crc_32_tab[(crc ^ *bin_data++) & 0xff] ^ (crc >> 8); |
Guido van Rossum | 7d47c9e | 2000-02-16 21:11:52 +0000 | [diff] [blame] | 930 | /* Note: (crc >> 8) MUST zero fill on left */ |
Gregory P. Smith | 2727503 | 2008-03-20 06:20:09 +0000 | [diff] [blame] | 931 | } |
Tim Peters | a98011c | 2002-07-02 20:20:08 +0000 | [diff] [blame] | 932 | |
Gregory P. Smith | 2727503 | 2008-03-20 06:20:09 +0000 | [diff] [blame] | 933 | result = (crc ^ 0xFFFFFFFF); |
| 934 | return PyLong_FromUnsignedLong(result & 0xffffffff); |
Guido van Rossum | 7d47c9e | 2000-02-16 21:11:52 +0000 | [diff] [blame] | 935 | } |
Christian Heimes | 1dc5400 | 2008-03-24 02:19:29 +0000 | [diff] [blame] | 936 | #endif /* USE_ZLIB_CRC32 */ |
Guido van Rossum | 7d47c9e | 2000-02-16 21:11:52 +0000 | [diff] [blame] | 937 | |
Barry Warsaw | e977c21 | 2000-08-15 06:07:13 +0000 | [diff] [blame] | 938 | |
| 939 | static PyObject * |
| 940 | binascii_hexlify(PyObject *self, PyObject *args) |
| 941 | { |
| 942 | char* argbuf; |
Thomas Wouters | f98db65 | 2006-03-01 21:37:32 +0000 | [diff] [blame] | 943 | Py_ssize_t arglen; |
Barry Warsaw | e977c21 | 2000-08-15 06:07:13 +0000 | [diff] [blame] | 944 | PyObject *retval; |
| 945 | char* retbuf; |
Thomas Wouters | f98db65 | 2006-03-01 21:37:32 +0000 | [diff] [blame] | 946 | Py_ssize_t i, j; |
Barry Warsaw | e977c21 | 2000-08-15 06:07:13 +0000 | [diff] [blame] | 947 | |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 948 | if (!PyArg_ParseTuple(args, "s#:b2a_hex", &argbuf, &arglen)) |
Barry Warsaw | e977c21 | 2000-08-15 06:07:13 +0000 | [diff] [blame] | 949 | return NULL; |
| 950 | |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame^] | 951 | retval = PyBytes_FromStringAndSize(NULL, arglen*2); |
Barry Warsaw | e977c21 | 2000-08-15 06:07:13 +0000 | [diff] [blame] | 952 | if (!retval) |
| 953 | return NULL; |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame^] | 954 | retbuf = PyBytes_AS_STRING(retval); |
Barry Warsaw | e977c21 | 2000-08-15 06:07:13 +0000 | [diff] [blame] | 955 | |
| 956 | /* make hex version of string, taken from shamodule.c */ |
| 957 | for (i=j=0; i < arglen; i++) { |
| 958 | char c; |
| 959 | c = (argbuf[i] >> 4) & 0xf; |
| 960 | c = (c>9) ? c+'a'-10 : c + '0'; |
| 961 | retbuf[j++] = c; |
| 962 | c = argbuf[i] & 0xf; |
| 963 | c = (c>9) ? c+'a'-10 : c + '0'; |
| 964 | retbuf[j++] = c; |
| 965 | } |
| 966 | return retval; |
Barry Warsaw | e977c21 | 2000-08-15 06:07:13 +0000 | [diff] [blame] | 967 | } |
| 968 | |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 969 | PyDoc_STRVAR(doc_hexlify, |
Barry Warsaw | e977c21 | 2000-08-15 06:07:13 +0000 | [diff] [blame] | 970 | "b2a_hex(data) -> s; Hexadecimal representation of binary data.\n\ |
| 971 | \n\ |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 972 | This function is also available as \"hexlify()\"."); |
Barry Warsaw | e977c21 | 2000-08-15 06:07:13 +0000 | [diff] [blame] | 973 | |
| 974 | |
| 975 | static int |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 976 | to_int(int c) |
Barry Warsaw | e977c21 | 2000-08-15 06:07:13 +0000 | [diff] [blame] | 977 | { |
| 978 | if (isdigit(c)) |
| 979 | return c - '0'; |
| 980 | else { |
| 981 | if (isupper(c)) |
| 982 | c = tolower(c); |
| 983 | if (c >= 'a' && c <= 'f') |
| 984 | return c - 'a' + 10; |
| 985 | } |
| 986 | return -1; |
| 987 | } |
| 988 | |
| 989 | |
| 990 | static PyObject * |
| 991 | binascii_unhexlify(PyObject *self, PyObject *args) |
| 992 | { |
| 993 | char* argbuf; |
Thomas Wouters | f98db65 | 2006-03-01 21:37:32 +0000 | [diff] [blame] | 994 | Py_ssize_t arglen; |
Barry Warsaw | e977c21 | 2000-08-15 06:07:13 +0000 | [diff] [blame] | 995 | PyObject *retval; |
| 996 | char* retbuf; |
Thomas Wouters | f98db65 | 2006-03-01 21:37:32 +0000 | [diff] [blame] | 997 | Py_ssize_t i, j; |
Barry Warsaw | e977c21 | 2000-08-15 06:07:13 +0000 | [diff] [blame] | 998 | |
| 999 | if (!PyArg_ParseTuple(args, "s#:a2b_hex", &argbuf, &arglen)) |
| 1000 | return NULL; |
| 1001 | |
Barry Warsaw | 1616847 | 2000-08-15 06:59:58 +0000 | [diff] [blame] | 1002 | /* XXX What should we do about strings with an odd length? Should |
| 1003 | * we add an implicit leading zero, or a trailing zero? For now, |
| 1004 | * raise an exception. |
Barry Warsaw | e977c21 | 2000-08-15 06:07:13 +0000 | [diff] [blame] | 1005 | */ |
| 1006 | if (arglen % 2) { |
Guido van Rossum | 4581ae5 | 2007-05-22 21:56:47 +0000 | [diff] [blame] | 1007 | PyErr_SetString(Error, "Odd-length string"); |
Barry Warsaw | e977c21 | 2000-08-15 06:07:13 +0000 | [diff] [blame] | 1008 | return NULL; |
| 1009 | } |
| 1010 | |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame^] | 1011 | retval = PyBytes_FromStringAndSize(NULL, (arglen/2)); |
Barry Warsaw | e977c21 | 2000-08-15 06:07:13 +0000 | [diff] [blame] | 1012 | if (!retval) |
| 1013 | return NULL; |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame^] | 1014 | retbuf = PyBytes_AS_STRING(retval); |
Barry Warsaw | e977c21 | 2000-08-15 06:07:13 +0000 | [diff] [blame] | 1015 | |
| 1016 | for (i=j=0; i < arglen; i += 2) { |
| 1017 | int top = to_int(Py_CHARMASK(argbuf[i])); |
| 1018 | int bot = to_int(Py_CHARMASK(argbuf[i+1])); |
| 1019 | if (top == -1 || bot == -1) { |
Guido van Rossum | 4581ae5 | 2007-05-22 21:56:47 +0000 | [diff] [blame] | 1020 | PyErr_SetString(Error, |
Barry Warsaw | 1616847 | 2000-08-15 06:59:58 +0000 | [diff] [blame] | 1021 | "Non-hexadecimal digit found"); |
Barry Warsaw | e977c21 | 2000-08-15 06:07:13 +0000 | [diff] [blame] | 1022 | goto finally; |
| 1023 | } |
| 1024 | retbuf[j++] = (top << 4) + bot; |
| 1025 | } |
| 1026 | return retval; |
| 1027 | |
| 1028 | finally: |
| 1029 | Py_DECREF(retval); |
| 1030 | return NULL; |
| 1031 | } |
| 1032 | |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 1033 | PyDoc_STRVAR(doc_unhexlify, |
Barry Warsaw | e977c21 | 2000-08-15 06:07:13 +0000 | [diff] [blame] | 1034 | "a2b_hex(hexstr) -> s; Binary data of hexadecimal representation.\n\ |
| 1035 | \n\ |
| 1036 | hexstr must contain an even number of hex digits (upper or lower case).\n\ |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 1037 | This function is also available as \"unhexlify()\""); |
Barry Warsaw | e977c21 | 2000-08-15 06:07:13 +0000 | [diff] [blame] | 1038 | |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 1039 | static int table_hex[128] = { |
| 1040 | -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, |
| 1041 | -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, |
| 1042 | -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, |
| 1043 | 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,-1,-1, -1,-1,-1,-1, |
| 1044 | -1,10,11,12, 13,14,15,-1, -1,-1,-1,-1, -1,-1,-1,-1, |
| 1045 | -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, |
| 1046 | -1,10,11,12, 13,14,15,-1, -1,-1,-1,-1, -1,-1,-1,-1, |
| 1047 | -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1 |
| 1048 | }; |
| 1049 | |
| 1050 | #define hexval(c) table_hex[(unsigned int)(c)] |
| 1051 | |
| 1052 | #define MAXLINESIZE 76 |
| 1053 | |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 1054 | PyDoc_STRVAR(doc_a2b_qp, "Decode a string of qp-encoded data"); |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 1055 | |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 1056 | static PyObject* |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 1057 | binascii_a2b_qp(PyObject *self, PyObject *args, PyObject *kwargs) |
| 1058 | { |
Thomas Wouters | 7087f78 | 2006-03-01 23:10:05 +0000 | [diff] [blame] | 1059 | Py_ssize_t in, out; |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 1060 | char ch; |
| 1061 | unsigned char *data, *odata; |
Thomas Wouters | f98db65 | 2006-03-01 21:37:32 +0000 | [diff] [blame] | 1062 | Py_ssize_t datalen = 0; |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 1063 | PyObject *rv; |
Martin v. Löwis | 15e6274 | 2006-02-27 16:46:16 +0000 | [diff] [blame] | 1064 | static char *kwlist[] = {"data", "header", NULL}; |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 1065 | int header = 0; |
| 1066 | |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 1067 | if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s#|i", kwlist, &data, |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 1068 | &datalen, &header)) |
| 1069 | return NULL; |
| 1070 | |
Barry Warsaw | 23164a5 | 2004-05-11 02:05:11 +0000 | [diff] [blame] | 1071 | /* We allocate the output same size as input, this is overkill. |
| 1072 | * The previous implementation used calloc() so we'll zero out the |
| 1073 | * memory here too, since PyMem_Malloc() does not guarantee that. |
| 1074 | */ |
| 1075 | odata = (unsigned char *) PyMem_Malloc(datalen); |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 1076 | if (odata == NULL) { |
| 1077 | PyErr_NoMemory(); |
| 1078 | return NULL; |
| 1079 | } |
Martin v. Löwis | b600fe9 | 2004-07-27 15:03:53 +0000 | [diff] [blame] | 1080 | memset(odata, 0, datalen); |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 1081 | |
| 1082 | in = out = 0; |
| 1083 | while (in < datalen) { |
| 1084 | if (data[in] == '=') { |
| 1085 | in++; |
| 1086 | if (in >= datalen) break; |
| 1087 | /* Soft line breaks */ |
Thomas Wouters | 89f507f | 2006-12-13 04:49:30 +0000 | [diff] [blame] | 1088 | if ((data[in] == '\n') || (data[in] == '\r')) { |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 1089 | if (data[in] != '\n') { |
| 1090 | while (in < datalen && data[in] != '\n') in++; |
| 1091 | } |
| 1092 | if (in < datalen) in++; |
| 1093 | } |
| 1094 | else if (data[in] == '=') { |
| 1095 | /* broken case from broken python qp */ |
| 1096 | odata[out++] = '='; |
| 1097 | in++; |
| 1098 | } |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 1099 | else if (((data[in] >= 'A' && data[in] <= 'F') || |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 1100 | (data[in] >= 'a' && data[in] <= 'f') || |
| 1101 | (data[in] >= '0' && data[in] <= '9')) && |
| 1102 | ((data[in+1] >= 'A' && data[in+1] <= 'F') || |
| 1103 | (data[in+1] >= 'a' && data[in+1] <= 'f') || |
| 1104 | (data[in+1] >= '0' && data[in+1] <= '9'))) { |
| 1105 | /* hexval */ |
| 1106 | ch = hexval(data[in]) << 4; |
| 1107 | in++; |
| 1108 | ch |= hexval(data[in]); |
| 1109 | in++; |
| 1110 | odata[out++] = ch; |
| 1111 | } |
| 1112 | else { |
| 1113 | odata[out++] = '='; |
| 1114 | } |
| 1115 | } |
| 1116 | else if (header && data[in] == '_') { |
| 1117 | odata[out++] = ' '; |
| 1118 | in++; |
| 1119 | } |
| 1120 | else { |
| 1121 | odata[out] = data[in]; |
| 1122 | in++; |
| 1123 | out++; |
| 1124 | } |
| 1125 | } |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame^] | 1126 | if ((rv = PyBytes_FromStringAndSize((char *)odata, out)) == NULL) { |
Barry Warsaw | 23164a5 | 2004-05-11 02:05:11 +0000 | [diff] [blame] | 1127 | PyMem_Free(odata); |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 1128 | return NULL; |
| 1129 | } |
Barry Warsaw | 23164a5 | 2004-05-11 02:05:11 +0000 | [diff] [blame] | 1130 | PyMem_Free(odata); |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 1131 | return rv; |
| 1132 | } |
| 1133 | |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 1134 | static int |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 1135 | to_hex (unsigned char ch, unsigned char *s) |
| 1136 | { |
| 1137 | unsigned int uvalue = ch; |
| 1138 | |
| 1139 | s[1] = "0123456789ABCDEF"[uvalue % 16]; |
| 1140 | uvalue = (uvalue / 16); |
| 1141 | s[0] = "0123456789ABCDEF"[uvalue % 16]; |
| 1142 | return 0; |
| 1143 | } |
| 1144 | |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 1145 | PyDoc_STRVAR(doc_b2a_qp, |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 1146 | "b2a_qp(data, quotetabs=0, istext=1, header=0) -> s; \n\ |
| 1147 | Encode a string using quoted-printable encoding. \n\ |
| 1148 | \n\ |
| 1149 | On encoding, when istext is set, newlines are not encoded, and white \n\ |
| 1150 | space at end of lines is. When istext is not set, \\r and \\n (CR/LF) are \n\ |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 1151 | both encoded. When quotetabs is set, space and tabs are encoded."); |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 1152 | |
| 1153 | /* XXX: This is ridiculously complicated to be backward compatible |
| 1154 | * (mostly) with the quopri module. It doesn't re-create the quopri |
| 1155 | * module bug where text ending in CRLF has the CR encoded */ |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 1156 | static PyObject* |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 1157 | binascii_b2a_qp (PyObject *self, PyObject *args, PyObject *kwargs) |
| 1158 | { |
Thomas Wouters | 7087f78 | 2006-03-01 23:10:05 +0000 | [diff] [blame] | 1159 | Py_ssize_t in, out; |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 1160 | unsigned char *data, *odata; |
Thomas Wouters | f98db65 | 2006-03-01 21:37:32 +0000 | [diff] [blame] | 1161 | Py_ssize_t datalen = 0, odatalen = 0; |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 1162 | PyObject *rv; |
| 1163 | unsigned int linelen = 0; |
Martin v. Löwis | 15e6274 | 2006-02-27 16:46:16 +0000 | [diff] [blame] | 1164 | static char *kwlist[] = {"data", "quotetabs", "istext", |
Jeremy Hylton | af68c87 | 2005-12-10 18:50:16 +0000 | [diff] [blame] | 1165 | "header", NULL}; |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 1166 | int istext = 1; |
| 1167 | int quotetabs = 0; |
| 1168 | int header = 0; |
| 1169 | unsigned char ch; |
| 1170 | int crlf = 0; |
| 1171 | unsigned char *p; |
| 1172 | |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 1173 | if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s#|iii", kwlist, &data, |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 1174 | &datalen, "etabs, &istext, &header)) |
| 1175 | return NULL; |
| 1176 | |
| 1177 | /* See if this string is using CRLF line ends */ |
| 1178 | /* XXX: this function has the side effect of converting all of |
| 1179 | * the end of lines to be the same depending on this detection |
| 1180 | * here */ |
Walter Dörwald | 0925e41 | 2007-05-09 18:23:50 +0000 | [diff] [blame] | 1181 | p = (unsigned char *) memchr(data, '\n', datalen); |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 1182 | if ((p != NULL) && (p > data) && (*(p-1) == '\r')) |
| 1183 | crlf = 1; |
| 1184 | |
| 1185 | /* First, scan to see how many characters need to be encoded */ |
| 1186 | in = 0; |
| 1187 | while (in < datalen) { |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 1188 | if ((data[in] > 126) || |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 1189 | (data[in] == '=') || |
| 1190 | (header && data[in] == '_') || |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 1191 | ((data[in] == '.') && (linelen == 0) && |
| 1192 | (data[in+1] == '\n' || data[in+1] == '\r' || data[in+1] == 0)) || |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 1193 | (!istext && ((data[in] == '\r') || (data[in] == '\n'))) || |
| 1194 | ((data[in] == '\t' || data[in] == ' ') && (in + 1 == datalen)) || |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 1195 | ((data[in] < 33) && |
| 1196 | (data[in] != '\r') && (data[in] != '\n') && |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 1197 | (quotetabs || |
| 1198 | (!quotetabs && ((data[in] != '\t') && (data[in] != ' ')))))) |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 1199 | { |
| 1200 | if ((linelen + 3) >= MAXLINESIZE) { |
| 1201 | linelen = 0; |
| 1202 | if (crlf) |
| 1203 | odatalen += 3; |
| 1204 | else |
| 1205 | odatalen += 2; |
| 1206 | } |
| 1207 | linelen += 3; |
| 1208 | odatalen += 3; |
| 1209 | in++; |
| 1210 | } |
| 1211 | else { |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 1212 | if (istext && |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 1213 | ((data[in] == '\n') || |
| 1214 | ((in+1 < datalen) && (data[in] == '\r') && |
| 1215 | (data[in+1] == '\n')))) |
| 1216 | { |
| 1217 | linelen = 0; |
| 1218 | /* Protect against whitespace on end of line */ |
| 1219 | if (in && ((data[in-1] == ' ') || (data[in-1] == '\t'))) |
| 1220 | odatalen += 2; |
| 1221 | if (crlf) |
| 1222 | odatalen += 2; |
| 1223 | else |
| 1224 | odatalen += 1; |
| 1225 | if (data[in] == '\r') |
| 1226 | in += 2; |
| 1227 | else |
| 1228 | in++; |
| 1229 | } |
| 1230 | else { |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 1231 | if ((in + 1 != datalen) && |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 1232 | (data[in+1] != '\n') && |
| 1233 | (linelen + 1) >= MAXLINESIZE) { |
| 1234 | linelen = 0; |
| 1235 | if (crlf) |
| 1236 | odatalen += 3; |
| 1237 | else |
| 1238 | odatalen += 2; |
| 1239 | } |
| 1240 | linelen++; |
| 1241 | odatalen++; |
| 1242 | in++; |
| 1243 | } |
| 1244 | } |
| 1245 | } |
| 1246 | |
Barry Warsaw | 23164a5 | 2004-05-11 02:05:11 +0000 | [diff] [blame] | 1247 | /* We allocate the output same size as input, this is overkill. |
| 1248 | * The previous implementation used calloc() so we'll zero out the |
| 1249 | * memory here too, since PyMem_Malloc() does not guarantee that. |
| 1250 | */ |
| 1251 | odata = (unsigned char *) PyMem_Malloc(odatalen); |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 1252 | if (odata == NULL) { |
| 1253 | PyErr_NoMemory(); |
| 1254 | return NULL; |
| 1255 | } |
Martin v. Löwis | b600fe9 | 2004-07-27 15:03:53 +0000 | [diff] [blame] | 1256 | memset(odata, 0, odatalen); |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 1257 | |
| 1258 | in = out = linelen = 0; |
| 1259 | while (in < datalen) { |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 1260 | if ((data[in] > 126) || |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 1261 | (data[in] == '=') || |
| 1262 | (header && data[in] == '_') || |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 1263 | ((data[in] == '.') && (linelen == 0) && |
| 1264 | (data[in+1] == '\n' || data[in+1] == '\r' || data[in+1] == 0)) || |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 1265 | (!istext && ((data[in] == '\r') || (data[in] == '\n'))) || |
| 1266 | ((data[in] == '\t' || data[in] == ' ') && (in + 1 == datalen)) || |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 1267 | ((data[in] < 33) && |
| 1268 | (data[in] != '\r') && (data[in] != '\n') && |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 1269 | (quotetabs || |
| 1270 | (!quotetabs && ((data[in] != '\t') && (data[in] != ' ')))))) |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 1271 | { |
| 1272 | if ((linelen + 3 )>= MAXLINESIZE) { |
| 1273 | odata[out++] = '='; |
| 1274 | if (crlf) odata[out++] = '\r'; |
| 1275 | odata[out++] = '\n'; |
| 1276 | linelen = 0; |
| 1277 | } |
| 1278 | odata[out++] = '='; |
| 1279 | to_hex(data[in], &odata[out]); |
| 1280 | out += 2; |
| 1281 | in++; |
| 1282 | linelen += 3; |
| 1283 | } |
| 1284 | else { |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 1285 | if (istext && |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 1286 | ((data[in] == '\n') || |
| 1287 | ((in+1 < datalen) && (data[in] == '\r') && |
| 1288 | (data[in+1] == '\n')))) |
| 1289 | { |
| 1290 | linelen = 0; |
| 1291 | /* Protect against whitespace on end of line */ |
| 1292 | if (out && ((odata[out-1] == ' ') || (odata[out-1] == '\t'))) { |
| 1293 | ch = odata[out-1]; |
| 1294 | odata[out-1] = '='; |
| 1295 | to_hex(ch, &odata[out]); |
| 1296 | out += 2; |
| 1297 | } |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 1298 | |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 1299 | if (crlf) odata[out++] = '\r'; |
| 1300 | odata[out++] = '\n'; |
| 1301 | if (data[in] == '\r') |
| 1302 | in += 2; |
| 1303 | else |
| 1304 | in++; |
| 1305 | } |
| 1306 | else { |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 1307 | if ((in + 1 != datalen) && |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 1308 | (data[in+1] != '\n') && |
| 1309 | (linelen + 1) >= MAXLINESIZE) { |
| 1310 | odata[out++] = '='; |
| 1311 | if (crlf) odata[out++] = '\r'; |
| 1312 | odata[out++] = '\n'; |
| 1313 | linelen = 0; |
| 1314 | } |
| 1315 | linelen++; |
| 1316 | if (header && data[in] == ' ') { |
| 1317 | odata[out++] = '_'; |
| 1318 | in++; |
| 1319 | } |
| 1320 | else { |
| 1321 | odata[out++] = data[in++]; |
| 1322 | } |
| 1323 | } |
| 1324 | } |
| 1325 | } |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame^] | 1326 | if ((rv = PyBytes_FromStringAndSize((char *)odata, out)) == NULL) { |
Barry Warsaw | 23164a5 | 2004-05-11 02:05:11 +0000 | [diff] [blame] | 1327 | PyMem_Free(odata); |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 1328 | return NULL; |
| 1329 | } |
Barry Warsaw | 23164a5 | 2004-05-11 02:05:11 +0000 | [diff] [blame] | 1330 | PyMem_Free(odata); |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 1331 | return rv; |
| 1332 | } |
Barry Warsaw | e977c21 | 2000-08-15 06:07:13 +0000 | [diff] [blame] | 1333 | |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 1334 | /* List of functions defined in the module */ |
| 1335 | |
| 1336 | static struct PyMethodDef binascii_module_methods[] = { |
Barry Warsaw | e977c21 | 2000-08-15 06:07:13 +0000 | [diff] [blame] | 1337 | {"a2b_uu", binascii_a2b_uu, METH_VARARGS, doc_a2b_uu}, |
| 1338 | {"b2a_uu", binascii_b2a_uu, METH_VARARGS, doc_b2a_uu}, |
| 1339 | {"a2b_base64", binascii_a2b_base64, METH_VARARGS, doc_a2b_base64}, |
| 1340 | {"b2a_base64", binascii_b2a_base64, METH_VARARGS, doc_b2a_base64}, |
| 1341 | {"a2b_hqx", binascii_a2b_hqx, METH_VARARGS, doc_a2b_hqx}, |
| 1342 | {"b2a_hqx", binascii_b2a_hqx, METH_VARARGS, doc_b2a_hqx}, |
| 1343 | {"b2a_hex", binascii_hexlify, METH_VARARGS, doc_hexlify}, |
| 1344 | {"a2b_hex", binascii_unhexlify, METH_VARARGS, doc_unhexlify}, |
| 1345 | {"hexlify", binascii_hexlify, METH_VARARGS, doc_hexlify}, |
| 1346 | {"unhexlify", binascii_unhexlify, METH_VARARGS, doc_unhexlify}, |
| 1347 | {"rlecode_hqx", binascii_rlecode_hqx, METH_VARARGS, doc_rlecode_hqx}, |
| 1348 | {"rledecode_hqx", binascii_rledecode_hqx, METH_VARARGS, |
| 1349 | doc_rledecode_hqx}, |
| 1350 | {"crc_hqx", binascii_crc_hqx, METH_VARARGS, doc_crc_hqx}, |
| 1351 | {"crc32", binascii_crc32, METH_VARARGS, doc_crc32}, |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 1352 | {"a2b_qp", (PyCFunction)binascii_a2b_qp, METH_VARARGS | METH_KEYWORDS, |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 1353 | doc_a2b_qp}, |
Tim Peters | 934c1a1 | 2002-07-02 22:24:50 +0000 | [diff] [blame] | 1354 | {"b2a_qp", (PyCFunction)binascii_b2a_qp, METH_VARARGS | METH_KEYWORDS, |
Martin v. Löwis | 16dc7f4 | 2001-09-30 20:32:11 +0000 | [diff] [blame] | 1355 | doc_b2a_qp}, |
Barry Warsaw | e977c21 | 2000-08-15 06:07:13 +0000 | [diff] [blame] | 1356 | {NULL, NULL} /* sentinel */ |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 1357 | }; |
| 1358 | |
| 1359 | |
| 1360 | /* Initialization function for the module (*must* be called initbinascii) */ |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 1361 | PyDoc_STRVAR(doc_binascii, "Conversion between binary data and ASCII"); |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 1362 | |
Mark Hammond | fe51c6d | 2002-08-02 02:27:13 +0000 | [diff] [blame] | 1363 | PyMODINIT_FUNC |
Thomas Wouters | f3f33dc | 2000-07-21 06:00:07 +0000 | [diff] [blame] | 1364 | initbinascii(void) |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 1365 | { |
Guido van Rossum | fe096d2 | 2007-08-23 18:31:24 +0000 | [diff] [blame] | 1366 | PyObject *m, *d; |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 1367 | |
| 1368 | /* Create the module and add the functions */ |
Neal Norwitz | 56dc955 | 2007-08-23 17:55:33 +0000 | [diff] [blame] | 1369 | m = Py_InitModule3("binascii", binascii_module_methods, doc_binascii); |
Neal Norwitz | 1ac754f | 2006-01-19 06:09:39 +0000 | [diff] [blame] | 1370 | if (m == NULL) |
| 1371 | return; |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 1372 | |
| 1373 | d = PyModule_GetDict(m); |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 1374 | |
Guido van Rossum | 4581ae5 | 2007-05-22 21:56:47 +0000 | [diff] [blame] | 1375 | Error = PyErr_NewException("binascii.Error", PyExc_ValueError, NULL); |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 1376 | PyDict_SetItemString(d, "Error", Error); |
Guido van Rossum | 7dbb48a | 1997-10-08 15:26:07 +0000 | [diff] [blame] | 1377 | Incomplete = PyErr_NewException("binascii.Incomplete", NULL, NULL); |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 1378 | PyDict_SetItemString(d, "Incomplete", Incomplete); |
Jack Jansen | 7278119 | 1995-08-07 14:34:15 +0000 | [diff] [blame] | 1379 | } |