| /* SHA256 module */ |
| |
| /* This module provides an interface to NIST's SHA-256 and SHA-224 Algorithms */ |
| |
| /* See below for information about the original code this module was |
| based upon. Additional work performed by: |
| |
| Andrew Kuchling (amk@amk.ca) |
| Greg Stein (gstein@lyra.org) |
| Trevor Perrin (trevp@trevp.net) |
| |
| Copyright (C) 2005-2007 Gregory P. Smith (greg@krypto.org) |
| Licensed to PSF under a Contributor Agreement. |
| |
| */ |
| |
| /* SHA objects */ |
| |
| #include "Python.h" |
| #include "structmember.h" |
| #include "hashlib.h" |
| |
| |
| /* Endianness testing and definitions */ |
| #define TestEndianness(variable) {int i=1; variable=PCT_BIG_ENDIAN;\ |
| if (*((char*)&i)==1) variable=PCT_LITTLE_ENDIAN;} |
| |
| #define PCT_LITTLE_ENDIAN 1 |
| #define PCT_BIG_ENDIAN 0 |
| |
| /* Some useful types */ |
| |
| typedef unsigned char SHA_BYTE; |
| |
| #if SIZEOF_INT == 4 |
| typedef unsigned int SHA_INT32; /* 32-bit integer */ |
| #else |
| /* not defined. compilation will die. */ |
| #endif |
| |
| /* The SHA block size and message digest sizes, in bytes */ |
| |
| #define SHA_BLOCKSIZE 64 |
| #define SHA_DIGESTSIZE 32 |
| |
| /* The structure for storing SHA info */ |
| |
| typedef struct { |
| PyObject_HEAD |
| SHA_INT32 digest[8]; /* Message digest */ |
| SHA_INT32 count_lo, count_hi; /* 64-bit bit count */ |
| SHA_BYTE data[SHA_BLOCKSIZE]; /* SHA data buffer */ |
| int Endianness; |
| int local; /* unprocessed amount in data */ |
| int digestsize; |
| } SHAobject; |
| |
| /* When run on a little-endian CPU we need to perform byte reversal on an |
| array of longwords. */ |
| |
| static void longReverse(SHA_INT32 *buffer, int byteCount, int Endianness) |
| { |
| SHA_INT32 value; |
| |
| if ( Endianness == PCT_BIG_ENDIAN ) |
| return; |
| |
| byteCount /= sizeof(*buffer); |
| while (byteCount--) { |
| value = *buffer; |
| value = ( ( value & 0xFF00FF00L ) >> 8 ) | \ |
| ( ( value & 0x00FF00FFL ) << 8 ); |
| *buffer++ = ( value << 16 ) | ( value >> 16 ); |
| } |
| } |
| |
| static void SHAcopy(SHAobject *src, SHAobject *dest) |
| { |
| dest->Endianness = src->Endianness; |
| dest->local = src->local; |
| dest->digestsize = src->digestsize; |
| dest->count_lo = src->count_lo; |
| dest->count_hi = src->count_hi; |
| memcpy(dest->digest, src->digest, sizeof(src->digest)); |
| memcpy(dest->data, src->data, sizeof(src->data)); |
| } |
| |
| |
| /* ------------------------------------------------------------------------ |
| * |
| * This code for the SHA-256 algorithm was noted as public domain. The |
| * original headers are pasted below. |
| * |
| * Several changes have been made to make it more compatible with the |
| * Python environment and desired interface. |
| * |
| */ |
| |
| /* LibTomCrypt, modular cryptographic library -- Tom St Denis |
| * |
| * LibTomCrypt is a library that provides various cryptographic |
| * algorithms in a highly modular and flexible manner. |
| * |
| * The library is free for all purposes without any express |
| * gurantee it works. |
| * |
| * Tom St Denis, tomstdenis@iahu.ca, http://libtom.org |
| */ |
| |
| |
| /* SHA256 by Tom St Denis */ |
| |
| /* Various logical functions */ |
| #define ROR(x, y)\ |
| ( ((((unsigned long)(x)&0xFFFFFFFFUL)>>(unsigned long)((y)&31)) | \ |
| ((unsigned long)(x)<<(unsigned long)(32-((y)&31)))) & 0xFFFFFFFFUL) |
| #define Ch(x,y,z) (z ^ (x & (y ^ z))) |
| #define Maj(x,y,z) (((x | y) & z) | (x & y)) |
| #define S(x, n) ROR((x),(n)) |
| #define R(x, n) (((x)&0xFFFFFFFFUL)>>(n)) |
| #define Sigma0(x) (S(x, 2) ^ S(x, 13) ^ S(x, 22)) |
| #define Sigma1(x) (S(x, 6) ^ S(x, 11) ^ S(x, 25)) |
| #define Gamma0(x) (S(x, 7) ^ S(x, 18) ^ R(x, 3)) |
| #define Gamma1(x) (S(x, 17) ^ S(x, 19) ^ R(x, 10)) |
| |
| |
| static void |
| sha_transform(SHAobject *sha_info) |
| { |
| int i; |
| SHA_INT32 S[8], W[64], t0, t1; |
| |
| memcpy(W, sha_info->data, sizeof(sha_info->data)); |
| longReverse(W, (int)sizeof(sha_info->data), sha_info->Endianness); |
| |
| for (i = 16; i < 64; ++i) { |
| W[i] = Gamma1(W[i - 2]) + W[i - 7] + Gamma0(W[i - 15]) + W[i - 16]; |
| } |
| for (i = 0; i < 8; ++i) { |
| S[i] = sha_info->digest[i]; |
| } |
| |
| /* Compress */ |
| #define RND(a,b,c,d,e,f,g,h,i,ki) \ |
| t0 = h + Sigma1(e) + Ch(e, f, g) + ki + W[i]; \ |
| t1 = Sigma0(a) + Maj(a, b, c); \ |
| d += t0; \ |
| h = t0 + t1; |
| |
| RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],0,0x428a2f98); |
| RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],1,0x71374491); |
| RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],2,0xb5c0fbcf); |
| RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],3,0xe9b5dba5); |
| RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],4,0x3956c25b); |
| RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],5,0x59f111f1); |
| RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],6,0x923f82a4); |
| RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],7,0xab1c5ed5); |
| RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],8,0xd807aa98); |
| RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],9,0x12835b01); |
| RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],10,0x243185be); |
| RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],11,0x550c7dc3); |
| RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],12,0x72be5d74); |
| RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],13,0x80deb1fe); |
| RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],14,0x9bdc06a7); |
| RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],15,0xc19bf174); |
| RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],16,0xe49b69c1); |
| RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],17,0xefbe4786); |
| RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],18,0x0fc19dc6); |
| RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],19,0x240ca1cc); |
| RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],20,0x2de92c6f); |
| RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],21,0x4a7484aa); |
| RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],22,0x5cb0a9dc); |
| RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],23,0x76f988da); |
| RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],24,0x983e5152); |
| RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],25,0xa831c66d); |
| RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],26,0xb00327c8); |
| RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],27,0xbf597fc7); |
| RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],28,0xc6e00bf3); |
| RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],29,0xd5a79147); |
| RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],30,0x06ca6351); |
| RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],31,0x14292967); |
| RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],32,0x27b70a85); |
| RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],33,0x2e1b2138); |
| RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],34,0x4d2c6dfc); |
| RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],35,0x53380d13); |
| RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],36,0x650a7354); |
| RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],37,0x766a0abb); |
| RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],38,0x81c2c92e); |
| RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],39,0x92722c85); |
| RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],40,0xa2bfe8a1); |
| RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],41,0xa81a664b); |
| RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],42,0xc24b8b70); |
| RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],43,0xc76c51a3); |
| RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],44,0xd192e819); |
| RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],45,0xd6990624); |
| RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],46,0xf40e3585); |
| RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],47,0x106aa070); |
| RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],48,0x19a4c116); |
| RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],49,0x1e376c08); |
| RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],50,0x2748774c); |
| RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],51,0x34b0bcb5); |
| RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],52,0x391c0cb3); |
| RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],53,0x4ed8aa4a); |
| RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],54,0x5b9cca4f); |
| RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],55,0x682e6ff3); |
| RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],56,0x748f82ee); |
| RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],57,0x78a5636f); |
| RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],58,0x84c87814); |
| RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],59,0x8cc70208); |
| RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],60,0x90befffa); |
| RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],61,0xa4506ceb); |
| RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],62,0xbef9a3f7); |
| RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],63,0xc67178f2); |
| |
| #undef RND |
| |
| /* feedback */ |
| for (i = 0; i < 8; i++) { |
| sha_info->digest[i] = sha_info->digest[i] + S[i]; |
| } |
| |
| } |
| |
| |
| |
| /* initialize the SHA digest */ |
| |
| static void |
| sha_init(SHAobject *sha_info) |
| { |
| TestEndianness(sha_info->Endianness) |
| sha_info->digest[0] = 0x6A09E667L; |
| sha_info->digest[1] = 0xBB67AE85L; |
| sha_info->digest[2] = 0x3C6EF372L; |
| sha_info->digest[3] = 0xA54FF53AL; |
| sha_info->digest[4] = 0x510E527FL; |
| sha_info->digest[5] = 0x9B05688CL; |
| sha_info->digest[6] = 0x1F83D9ABL; |
| sha_info->digest[7] = 0x5BE0CD19L; |
| sha_info->count_lo = 0L; |
| sha_info->count_hi = 0L; |
| sha_info->local = 0; |
| sha_info->digestsize = 32; |
| } |
| |
| static void |
| sha224_init(SHAobject *sha_info) |
| { |
| TestEndianness(sha_info->Endianness) |
| sha_info->digest[0] = 0xc1059ed8L; |
| sha_info->digest[1] = 0x367cd507L; |
| sha_info->digest[2] = 0x3070dd17L; |
| sha_info->digest[3] = 0xf70e5939L; |
| sha_info->digest[4] = 0xffc00b31L; |
| sha_info->digest[5] = 0x68581511L; |
| sha_info->digest[6] = 0x64f98fa7L; |
| sha_info->digest[7] = 0xbefa4fa4L; |
| sha_info->count_lo = 0L; |
| sha_info->count_hi = 0L; |
| sha_info->local = 0; |
| sha_info->digestsize = 28; |
| } |
| |
| |
| /* update the SHA digest */ |
| |
| static void |
| sha_update(SHAobject *sha_info, SHA_BYTE *buffer, int count) |
| { |
| int i; |
| SHA_INT32 clo; |
| |
| clo = sha_info->count_lo + ((SHA_INT32) count << 3); |
| if (clo < sha_info->count_lo) { |
| ++sha_info->count_hi; |
| } |
| sha_info->count_lo = clo; |
| sha_info->count_hi += (SHA_INT32) count >> 29; |
| if (sha_info->local) { |
| i = SHA_BLOCKSIZE - sha_info->local; |
| if (i > count) { |
| i = count; |
| } |
| memcpy(((SHA_BYTE *) sha_info->data) + sha_info->local, buffer, i); |
| count -= i; |
| buffer += i; |
| sha_info->local += i; |
| if (sha_info->local == SHA_BLOCKSIZE) { |
| sha_transform(sha_info); |
| } |
| else { |
| return; |
| } |
| } |
| while (count >= SHA_BLOCKSIZE) { |
| memcpy(sha_info->data, buffer, SHA_BLOCKSIZE); |
| buffer += SHA_BLOCKSIZE; |
| count -= SHA_BLOCKSIZE; |
| sha_transform(sha_info); |
| } |
| memcpy(sha_info->data, buffer, count); |
| sha_info->local = count; |
| } |
| |
| /* finish computing the SHA digest */ |
| |
| static void |
| sha_final(unsigned char digest[SHA_DIGESTSIZE], SHAobject *sha_info) |
| { |
| int count; |
| SHA_INT32 lo_bit_count, hi_bit_count; |
| |
| lo_bit_count = sha_info->count_lo; |
| hi_bit_count = sha_info->count_hi; |
| count = (int) ((lo_bit_count >> 3) & 0x3f); |
| ((SHA_BYTE *) sha_info->data)[count++] = 0x80; |
| if (count > SHA_BLOCKSIZE - 8) { |
| memset(((SHA_BYTE *) sha_info->data) + count, 0, |
| SHA_BLOCKSIZE - count); |
| sha_transform(sha_info); |
| memset((SHA_BYTE *) sha_info->data, 0, SHA_BLOCKSIZE - 8); |
| } |
| else { |
| memset(((SHA_BYTE *) sha_info->data) + count, 0, |
| SHA_BLOCKSIZE - 8 - count); |
| } |
| |
| /* GJS: note that we add the hi/lo in big-endian. sha_transform will |
| swap these values into host-order. */ |
| sha_info->data[56] = (hi_bit_count >> 24) & 0xff; |
| sha_info->data[57] = (hi_bit_count >> 16) & 0xff; |
| sha_info->data[58] = (hi_bit_count >> 8) & 0xff; |
| sha_info->data[59] = (hi_bit_count >> 0) & 0xff; |
| sha_info->data[60] = (lo_bit_count >> 24) & 0xff; |
| sha_info->data[61] = (lo_bit_count >> 16) & 0xff; |
| sha_info->data[62] = (lo_bit_count >> 8) & 0xff; |
| sha_info->data[63] = (lo_bit_count >> 0) & 0xff; |
| sha_transform(sha_info); |
| digest[ 0] = (unsigned char) ((sha_info->digest[0] >> 24) & 0xff); |
| digest[ 1] = (unsigned char) ((sha_info->digest[0] >> 16) & 0xff); |
| digest[ 2] = (unsigned char) ((sha_info->digest[0] >> 8) & 0xff); |
| digest[ 3] = (unsigned char) ((sha_info->digest[0] ) & 0xff); |
| digest[ 4] = (unsigned char) ((sha_info->digest[1] >> 24) & 0xff); |
| digest[ 5] = (unsigned char) ((sha_info->digest[1] >> 16) & 0xff); |
| digest[ 6] = (unsigned char) ((sha_info->digest[1] >> 8) & 0xff); |
| digest[ 7] = (unsigned char) ((sha_info->digest[1] ) & 0xff); |
| digest[ 8] = (unsigned char) ((sha_info->digest[2] >> 24) & 0xff); |
| digest[ 9] = (unsigned char) ((sha_info->digest[2] >> 16) & 0xff); |
| digest[10] = (unsigned char) ((sha_info->digest[2] >> 8) & 0xff); |
| digest[11] = (unsigned char) ((sha_info->digest[2] ) & 0xff); |
| digest[12] = (unsigned char) ((sha_info->digest[3] >> 24) & 0xff); |
| digest[13] = (unsigned char) ((sha_info->digest[3] >> 16) & 0xff); |
| digest[14] = (unsigned char) ((sha_info->digest[3] >> 8) & 0xff); |
| digest[15] = (unsigned char) ((sha_info->digest[3] ) & 0xff); |
| digest[16] = (unsigned char) ((sha_info->digest[4] >> 24) & 0xff); |
| digest[17] = (unsigned char) ((sha_info->digest[4] >> 16) & 0xff); |
| digest[18] = (unsigned char) ((sha_info->digest[4] >> 8) & 0xff); |
| digest[19] = (unsigned char) ((sha_info->digest[4] ) & 0xff); |
| digest[20] = (unsigned char) ((sha_info->digest[5] >> 24) & 0xff); |
| digest[21] = (unsigned char) ((sha_info->digest[5] >> 16) & 0xff); |
| digest[22] = (unsigned char) ((sha_info->digest[5] >> 8) & 0xff); |
| digest[23] = (unsigned char) ((sha_info->digest[5] ) & 0xff); |
| digest[24] = (unsigned char) ((sha_info->digest[6] >> 24) & 0xff); |
| digest[25] = (unsigned char) ((sha_info->digest[6] >> 16) & 0xff); |
| digest[26] = (unsigned char) ((sha_info->digest[6] >> 8) & 0xff); |
| digest[27] = (unsigned char) ((sha_info->digest[6] ) & 0xff); |
| digest[28] = (unsigned char) ((sha_info->digest[7] >> 24) & 0xff); |
| digest[29] = (unsigned char) ((sha_info->digest[7] >> 16) & 0xff); |
| digest[30] = (unsigned char) ((sha_info->digest[7] >> 8) & 0xff); |
| digest[31] = (unsigned char) ((sha_info->digest[7] ) & 0xff); |
| } |
| |
| /* |
| * End of copied SHA code. |
| * |
| * ------------------------------------------------------------------------ |
| */ |
| |
| static PyTypeObject SHA224type; |
| static PyTypeObject SHA256type; |
| |
| |
| static SHAobject * |
| newSHA224object(void) |
| { |
| return (SHAobject *)PyObject_New(SHAobject, &SHA224type); |
| } |
| |
| static SHAobject * |
| newSHA256object(void) |
| { |
| return (SHAobject *)PyObject_New(SHAobject, &SHA256type); |
| } |
| |
| /* Internal methods for a hash object */ |
| |
| static void |
| SHA_dealloc(PyObject *ptr) |
| { |
| PyObject_Del(ptr); |
| } |
| |
| |
| /* External methods for a hash object */ |
| |
| PyDoc_STRVAR(SHA256_copy__doc__, "Return a copy of the hash object."); |
| |
| static PyObject * |
| SHA256_copy(SHAobject *self, PyObject *unused) |
| { |
| SHAobject *newobj; |
| |
| if (Py_TYPE(self) == &SHA256type) { |
| if ( (newobj = newSHA256object())==NULL) |
| return NULL; |
| } else { |
| if ( (newobj = newSHA224object())==NULL) |
| return NULL; |
| } |
| |
| SHAcopy(self, newobj); |
| return (PyObject *)newobj; |
| } |
| |
| PyDoc_STRVAR(SHA256_digest__doc__, |
| "Return the digest value as a string of binary data."); |
| |
| static PyObject * |
| SHA256_digest(SHAobject *self, PyObject *unused) |
| { |
| unsigned char digest[SHA_DIGESTSIZE]; |
| SHAobject temp; |
| |
| SHAcopy(self, &temp); |
| sha_final(digest, &temp); |
| return PyBytes_FromStringAndSize((const char *)digest, self->digestsize); |
| } |
| |
| PyDoc_STRVAR(SHA256_hexdigest__doc__, |
| "Return the digest value as a string of hexadecimal digits."); |
| |
| static PyObject * |
| SHA256_hexdigest(SHAobject *self, PyObject *unused) |
| { |
| unsigned char digest[SHA_DIGESTSIZE]; |
| SHAobject temp; |
| PyObject *retval; |
| Py_UNICODE *hex_digest; |
| int i, j; |
| |
| /* Get the raw (binary) digest value */ |
| SHAcopy(self, &temp); |
| sha_final(digest, &temp); |
| |
| /* Create a new string */ |
| retval = PyUnicode_FromStringAndSize(NULL, self->digestsize * 2); |
| if (!retval) |
| return NULL; |
| hex_digest = PyUnicode_AS_UNICODE(retval); |
| if (!hex_digest) { |
| Py_DECREF(retval); |
| return NULL; |
| } |
| |
| /* Make hex version of the digest */ |
| for(i=j=0; i<self->digestsize; i++) { |
| char c; |
| c = (digest[i] >> 4) & 0xf; |
| c = (c>9) ? c+'a'-10 : c + '0'; |
| hex_digest[j++] = c; |
| c = (digest[i] & 0xf); |
| c = (c>9) ? c+'a'-10 : c + '0'; |
| hex_digest[j++] = c; |
| } |
| return retval; |
| } |
| |
| PyDoc_STRVAR(SHA256_update__doc__, |
| "Update this hash object's state with the provided string."); |
| |
| static PyObject * |
| SHA256_update(SHAobject *self, PyObject *args) |
| { |
| PyObject *obj; |
| Py_buffer buf; |
| |
| if (!PyArg_ParseTuple(args, "O:update", &obj)) |
| return NULL; |
| |
| GET_BUFFER_VIEW_OR_ERROUT(obj, &buf); |
| |
| sha_update(self, buf.buf, buf.len); |
| |
| PyBuffer_Release(&buf); |
| Py_INCREF(Py_None); |
| return Py_None; |
| } |
| |
| static PyMethodDef SHA_methods[] = { |
| {"copy", (PyCFunction)SHA256_copy, METH_NOARGS, SHA256_copy__doc__}, |
| {"digest", (PyCFunction)SHA256_digest, METH_NOARGS, SHA256_digest__doc__}, |
| {"hexdigest", (PyCFunction)SHA256_hexdigest, METH_NOARGS, SHA256_hexdigest__doc__}, |
| {"update", (PyCFunction)SHA256_update, METH_VARARGS, SHA256_update__doc__}, |
| {NULL, NULL} /* sentinel */ |
| }; |
| |
| static PyObject * |
| SHA256_get_block_size(PyObject *self, void *closure) |
| { |
| return PyLong_FromLong(SHA_BLOCKSIZE); |
| } |
| |
| static PyObject * |
| SHA256_get_name(PyObject *self, void *closure) |
| { |
| if (((SHAobject *)self)->digestsize == 32) |
| return PyUnicode_FromStringAndSize("SHA256", 6); |
| else |
| return PyUnicode_FromStringAndSize("SHA224", 6); |
| } |
| |
| static PyGetSetDef SHA_getseters[] = { |
| {"block_size", |
| (getter)SHA256_get_block_size, NULL, |
| NULL, |
| NULL}, |
| {"name", |
| (getter)SHA256_get_name, NULL, |
| NULL, |
| NULL}, |
| {NULL} /* Sentinel */ |
| }; |
| |
| static PyMemberDef SHA_members[] = { |
| {"digest_size", T_INT, offsetof(SHAobject, digestsize), READONLY, NULL}, |
| {NULL} /* Sentinel */ |
| }; |
| |
| static PyTypeObject SHA224type = { |
| PyVarObject_HEAD_INIT(NULL, 0) |
| "_sha256.sha224", /*tp_name*/ |
| sizeof(SHAobject), /*tp_size*/ |
| 0, /*tp_itemsize*/ |
| /* methods */ |
| SHA_dealloc, /*tp_dealloc*/ |
| 0, /*tp_print*/ |
| 0, /*tp_getattr*/ |
| 0, /*tp_setattr*/ |
| 0, /*tp_reserved*/ |
| 0, /*tp_repr*/ |
| 0, /*tp_as_number*/ |
| 0, /*tp_as_sequence*/ |
| 0, /*tp_as_mapping*/ |
| 0, /*tp_hash*/ |
| 0, /*tp_call*/ |
| 0, /*tp_str*/ |
| 0, /*tp_getattro*/ |
| 0, /*tp_setattro*/ |
| 0, /*tp_as_buffer*/ |
| Py_TPFLAGS_DEFAULT, /*tp_flags*/ |
| 0, /*tp_doc*/ |
| 0, /*tp_traverse*/ |
| 0, /*tp_clear*/ |
| 0, /*tp_richcompare*/ |
| 0, /*tp_weaklistoffset*/ |
| 0, /*tp_iter*/ |
| 0, /*tp_iternext*/ |
| SHA_methods, /* tp_methods */ |
| SHA_members, /* tp_members */ |
| SHA_getseters, /* tp_getset */ |
| }; |
| |
| static PyTypeObject SHA256type = { |
| PyVarObject_HEAD_INIT(NULL, 0) |
| "_sha256.sha256", /*tp_name*/ |
| sizeof(SHAobject), /*tp_size*/ |
| 0, /*tp_itemsize*/ |
| /* methods */ |
| SHA_dealloc, /*tp_dealloc*/ |
| 0, /*tp_print*/ |
| 0, /*tp_getattr*/ |
| 0, /*tp_setattr*/ |
| 0, /*tp_reserved*/ |
| 0, /*tp_repr*/ |
| 0, /*tp_as_number*/ |
| 0, /*tp_as_sequence*/ |
| 0, /*tp_as_mapping*/ |
| 0, /*tp_hash*/ |
| 0, /*tp_call*/ |
| 0, /*tp_str*/ |
| 0, /*tp_getattro*/ |
| 0, /*tp_setattro*/ |
| 0, /*tp_as_buffer*/ |
| Py_TPFLAGS_DEFAULT, /*tp_flags*/ |
| 0, /*tp_doc*/ |
| 0, /*tp_traverse*/ |
| 0, /*tp_clear*/ |
| 0, /*tp_richcompare*/ |
| 0, /*tp_weaklistoffset*/ |
| 0, /*tp_iter*/ |
| 0, /*tp_iternext*/ |
| SHA_methods, /* tp_methods */ |
| SHA_members, /* tp_members */ |
| SHA_getseters, /* tp_getset */ |
| }; |
| |
| |
| /* The single module-level function: new() */ |
| |
| PyDoc_STRVAR(SHA256_new__doc__, |
| "Return a new SHA-256 hash object; optionally initialized with a string."); |
| |
| static PyObject * |
| SHA256_new(PyObject *self, PyObject *args, PyObject *kwdict) |
| { |
| static char *kwlist[] = {"string", NULL}; |
| SHAobject *new; |
| PyObject *data_obj = NULL; |
| Py_buffer buf; |
| |
| if (!PyArg_ParseTupleAndKeywords(args, kwdict, "|O:new", kwlist, |
| &data_obj)) { |
| return NULL; |
| } |
| |
| if (data_obj) |
| GET_BUFFER_VIEW_OR_ERROUT(data_obj, &buf); |
| |
| if ((new = newSHA256object()) == NULL) { |
| if (data_obj) |
| PyBuffer_Release(&buf); |
| return NULL; |
| } |
| |
| sha_init(new); |
| |
| if (PyErr_Occurred()) { |
| Py_DECREF(new); |
| if (data_obj) |
| PyBuffer_Release(&buf); |
| return NULL; |
| } |
| if (data_obj) { |
| sha_update(new, buf.buf, buf.len); |
| PyBuffer_Release(&buf); |
| } |
| |
| return (PyObject *)new; |
| } |
| |
| PyDoc_STRVAR(SHA224_new__doc__, |
| "Return a new SHA-224 hash object; optionally initialized with a string."); |
| |
| static PyObject * |
| SHA224_new(PyObject *self, PyObject *args, PyObject *kwdict) |
| { |
| static char *kwlist[] = {"string", NULL}; |
| SHAobject *new; |
| PyObject *data_obj = NULL; |
| Py_buffer buf; |
| |
| if (!PyArg_ParseTupleAndKeywords(args, kwdict, "|O:new", kwlist, |
| &data_obj)) { |
| return NULL; |
| } |
| |
| if (data_obj) |
| GET_BUFFER_VIEW_OR_ERROUT(data_obj, &buf); |
| |
| if ((new = newSHA224object()) == NULL) { |
| if (data_obj) |
| PyBuffer_Release(&buf); |
| return NULL; |
| } |
| |
| sha224_init(new); |
| |
| if (PyErr_Occurred()) { |
| Py_DECREF(new); |
| if (data_obj) |
| PyBuffer_Release(&buf); |
| return NULL; |
| } |
| if (data_obj) { |
| sha_update(new, buf.buf, buf.len); |
| PyBuffer_Release(&buf); |
| } |
| |
| return (PyObject *)new; |
| } |
| |
| |
| /* List of functions exported by this module */ |
| |
| static struct PyMethodDef SHA_functions[] = { |
| {"sha256", (PyCFunction)SHA256_new, METH_VARARGS|METH_KEYWORDS, SHA256_new__doc__}, |
| {"sha224", (PyCFunction)SHA224_new, METH_VARARGS|METH_KEYWORDS, SHA224_new__doc__}, |
| {NULL, NULL} /* Sentinel */ |
| }; |
| |
| |
| /* Initialize this module. */ |
| |
| #define insint(n,v) { PyModule_AddIntConstant(m,n,v); } |
| |
| |
| static struct PyModuleDef _sha256module = { |
| PyModuleDef_HEAD_INIT, |
| "_sha256", |
| NULL, |
| -1, |
| SHA_functions, |
| NULL, |
| NULL, |
| NULL, |
| NULL |
| }; |
| |
| PyMODINIT_FUNC |
| PyInit__sha256(void) |
| { |
| Py_TYPE(&SHA224type) = &PyType_Type; |
| if (PyType_Ready(&SHA224type) < 0) |
| return NULL; |
| Py_TYPE(&SHA256type) = &PyType_Type; |
| if (PyType_Ready(&SHA256type) < 0) |
| return NULL; |
| return PyModule_Create(&_sha256module); |
| } |