| /* MD5 module */ |
| |
| /* This module provides an interface to the MD5 algorithm */ |
| |
| /* 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. |
| |
| */ |
| |
| /* MD5 objects */ |
| |
| #include "Python.h" |
| #include "hashlib.h" |
| |
| |
| /* Some useful types */ |
| |
| #if SIZEOF_INT == 4 |
| typedef unsigned int MD5_INT32; /* 32-bit integer */ |
| typedef PY_LONG_LONG MD5_INT64; /* 64-bit integer */ |
| #else |
| /* not defined. compilation will die. */ |
| #endif |
| |
| /* The MD5 block size and message digest sizes, in bytes */ |
| |
| #define MD5_BLOCKSIZE 64 |
| #define MD5_DIGESTSIZE 16 |
| |
| /* The structure for storing MD5 info */ |
| |
| struct md5_state { |
| MD5_INT64 length; |
| MD5_INT32 state[4], curlen; |
| unsigned char buf[MD5_BLOCKSIZE]; |
| }; |
| |
| typedef struct { |
| PyObject_HEAD |
| |
| struct md5_state hash_state; |
| } MD5object; |
| |
| |
| /* ------------------------------------------------------------------------ |
| * |
| * This code for the MD5 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 |
| * guarantee it works. |
| * |
| * Tom St Denis, tomstdenis@gmail.com, http://libtom.org |
| */ |
| |
| /* rotate the hard way (platform optimizations could be done) */ |
| #define ROLc(x, y) ( (((unsigned long)(x)<<(unsigned long)((y)&31)) | (((unsigned long)(x)&0xFFFFFFFFUL)>>(unsigned long)(32-((y)&31)))) & 0xFFFFFFFFUL) |
| |
| /* Endian Neutral macros that work on all platforms */ |
| |
| #define STORE32L(x, y) \ |
| { (y)[3] = (unsigned char)(((x)>>24)&255); (y)[2] = (unsigned char)(((x)>>16)&255); \ |
| (y)[1] = (unsigned char)(((x)>>8)&255); (y)[0] = (unsigned char)((x)&255); } |
| |
| #define LOAD32L(x, y) \ |
| { x = ((unsigned long)((y)[3] & 255)<<24) | \ |
| ((unsigned long)((y)[2] & 255)<<16) | \ |
| ((unsigned long)((y)[1] & 255)<<8) | \ |
| ((unsigned long)((y)[0] & 255)); } |
| |
| #define STORE64L(x, y) \ |
| { (y)[7] = (unsigned char)(((x)>>56)&255); (y)[6] = (unsigned char)(((x)>>48)&255); \ |
| (y)[5] = (unsigned char)(((x)>>40)&255); (y)[4] = (unsigned char)(((x)>>32)&255); \ |
| (y)[3] = (unsigned char)(((x)>>24)&255); (y)[2] = (unsigned char)(((x)>>16)&255); \ |
| (y)[1] = (unsigned char)(((x)>>8)&255); (y)[0] = (unsigned char)((x)&255); } |
| |
| #ifndef MIN |
| #define MIN(x, y) ( ((x)<(y))?(x):(y) ) |
| #endif |
| |
| |
| /* MD5 macros */ |
| |
| #define F(x,y,z) (z ^ (x & (y ^ z))) |
| #define G(x,y,z) (y ^ (z & (y ^ x))) |
| #define H(x,y,z) (x^y^z) |
| #define I(x,y,z) (y^(x|(~z))) |
| |
| #define FF(a,b,c,d,M,s,t) \ |
| a = (a + F(b,c,d) + M + t); a = ROLc(a, s) + b; |
| |
| #define GG(a,b,c,d,M,s,t) \ |
| a = (a + G(b,c,d) + M + t); a = ROLc(a, s) + b; |
| |
| #define HH(a,b,c,d,M,s,t) \ |
| a = (a + H(b,c,d) + M + t); a = ROLc(a, s) + b; |
| |
| #define II(a,b,c,d,M,s,t) \ |
| a = (a + I(b,c,d) + M + t); a = ROLc(a, s) + b; |
| |
| |
| static void md5_compress(struct md5_state *md5, unsigned char *buf) |
| { |
| MD5_INT32 i, W[16], a, b, c, d; |
| |
| assert(md5 != NULL); |
| assert(buf != NULL); |
| |
| /* copy the state into 512-bits into W[0..15] */ |
| for (i = 0; i < 16; i++) { |
| LOAD32L(W[i], buf + (4*i)); |
| } |
| |
| /* copy state */ |
| a = md5->state[0]; |
| b = md5->state[1]; |
| c = md5->state[2]; |
| d = md5->state[3]; |
| |
| FF(a,b,c,d,W[0],7,0xd76aa478UL) |
| FF(d,a,b,c,W[1],12,0xe8c7b756UL) |
| FF(c,d,a,b,W[2],17,0x242070dbUL) |
| FF(b,c,d,a,W[3],22,0xc1bdceeeUL) |
| FF(a,b,c,d,W[4],7,0xf57c0fafUL) |
| FF(d,a,b,c,W[5],12,0x4787c62aUL) |
| FF(c,d,a,b,W[6],17,0xa8304613UL) |
| FF(b,c,d,a,W[7],22,0xfd469501UL) |
| FF(a,b,c,d,W[8],7,0x698098d8UL) |
| FF(d,a,b,c,W[9],12,0x8b44f7afUL) |
| FF(c,d,a,b,W[10],17,0xffff5bb1UL) |
| FF(b,c,d,a,W[11],22,0x895cd7beUL) |
| FF(a,b,c,d,W[12],7,0x6b901122UL) |
| FF(d,a,b,c,W[13],12,0xfd987193UL) |
| FF(c,d,a,b,W[14],17,0xa679438eUL) |
| FF(b,c,d,a,W[15],22,0x49b40821UL) |
| GG(a,b,c,d,W[1],5,0xf61e2562UL) |
| GG(d,a,b,c,W[6],9,0xc040b340UL) |
| GG(c,d,a,b,W[11],14,0x265e5a51UL) |
| GG(b,c,d,a,W[0],20,0xe9b6c7aaUL) |
| GG(a,b,c,d,W[5],5,0xd62f105dUL) |
| GG(d,a,b,c,W[10],9,0x02441453UL) |
| GG(c,d,a,b,W[15],14,0xd8a1e681UL) |
| GG(b,c,d,a,W[4],20,0xe7d3fbc8UL) |
| GG(a,b,c,d,W[9],5,0x21e1cde6UL) |
| GG(d,a,b,c,W[14],9,0xc33707d6UL) |
| GG(c,d,a,b,W[3],14,0xf4d50d87UL) |
| GG(b,c,d,a,W[8],20,0x455a14edUL) |
| GG(a,b,c,d,W[13],5,0xa9e3e905UL) |
| GG(d,a,b,c,W[2],9,0xfcefa3f8UL) |
| GG(c,d,a,b,W[7],14,0x676f02d9UL) |
| GG(b,c,d,a,W[12],20,0x8d2a4c8aUL) |
| HH(a,b,c,d,W[5],4,0xfffa3942UL) |
| HH(d,a,b,c,W[8],11,0x8771f681UL) |
| HH(c,d,a,b,W[11],16,0x6d9d6122UL) |
| HH(b,c,d,a,W[14],23,0xfde5380cUL) |
| HH(a,b,c,d,W[1],4,0xa4beea44UL) |
| HH(d,a,b,c,W[4],11,0x4bdecfa9UL) |
| HH(c,d,a,b,W[7],16,0xf6bb4b60UL) |
| HH(b,c,d,a,W[10],23,0xbebfbc70UL) |
| HH(a,b,c,d,W[13],4,0x289b7ec6UL) |
| HH(d,a,b,c,W[0],11,0xeaa127faUL) |
| HH(c,d,a,b,W[3],16,0xd4ef3085UL) |
| HH(b,c,d,a,W[6],23,0x04881d05UL) |
| HH(a,b,c,d,W[9],4,0xd9d4d039UL) |
| HH(d,a,b,c,W[12],11,0xe6db99e5UL) |
| HH(c,d,a,b,W[15],16,0x1fa27cf8UL) |
| HH(b,c,d,a,W[2],23,0xc4ac5665UL) |
| II(a,b,c,d,W[0],6,0xf4292244UL) |
| II(d,a,b,c,W[7],10,0x432aff97UL) |
| II(c,d,a,b,W[14],15,0xab9423a7UL) |
| II(b,c,d,a,W[5],21,0xfc93a039UL) |
| II(a,b,c,d,W[12],6,0x655b59c3UL) |
| II(d,a,b,c,W[3],10,0x8f0ccc92UL) |
| II(c,d,a,b,W[10],15,0xffeff47dUL) |
| II(b,c,d,a,W[1],21,0x85845dd1UL) |
| II(a,b,c,d,W[8],6,0x6fa87e4fUL) |
| II(d,a,b,c,W[15],10,0xfe2ce6e0UL) |
| II(c,d,a,b,W[6],15,0xa3014314UL) |
| II(b,c,d,a,W[13],21,0x4e0811a1UL) |
| II(a,b,c,d,W[4],6,0xf7537e82UL) |
| II(d,a,b,c,W[11],10,0xbd3af235UL) |
| II(c,d,a,b,W[2],15,0x2ad7d2bbUL) |
| II(b,c,d,a,W[9],21,0xeb86d391UL) |
| |
| md5->state[0] = md5->state[0] + a; |
| md5->state[1] = md5->state[1] + b; |
| md5->state[2] = md5->state[2] + c; |
| md5->state[3] = md5->state[3] + d; |
| } |
| |
| |
| /** |
| Initialize the hash state |
| @param sha1 The hash state you wish to initialize |
| */ |
| void md5_init(struct md5_state *md5) |
| { |
| assert(md5 != NULL); |
| md5->state[0] = 0x67452301UL; |
| md5->state[1] = 0xefcdab89UL; |
| md5->state[2] = 0x98badcfeUL; |
| md5->state[3] = 0x10325476UL; |
| md5->curlen = 0; |
| md5->length = 0; |
| } |
| |
| /** |
| Process a block of memory though the hash |
| @param sha1 The hash state |
| @param in The data to hash |
| @param inlen The length of the data (octets) |
| */ |
| void md5_process(struct md5_state *md5, |
| const unsigned char *in, unsigned long inlen) |
| { |
| unsigned long n; |
| |
| assert(md5 != NULL); |
| assert(in != NULL); |
| assert(md5->curlen <= sizeof(md5->buf)); |
| |
| while (inlen > 0) { |
| if (md5->curlen == 0 && inlen >= MD5_BLOCKSIZE) { |
| md5_compress(md5, (unsigned char *)in); |
| md5->length += MD5_BLOCKSIZE * 8; |
| in += MD5_BLOCKSIZE; |
| inlen -= MD5_BLOCKSIZE; |
| } else { |
| n = MIN(inlen, (MD5_BLOCKSIZE - md5->curlen)); |
| memcpy(md5->buf + md5->curlen, in, (size_t)n); |
| md5->curlen += n; |
| in += n; |
| inlen -= n; |
| if (md5->curlen == MD5_BLOCKSIZE) { |
| md5_compress(md5, md5->buf); |
| md5->length += 8*MD5_BLOCKSIZE; |
| md5->curlen = 0; |
| } |
| } |
| } |
| } |
| |
| /** |
| Terminate the hash to get the digest |
| @param sha1 The hash state |
| @param out [out] The destination of the hash (16 bytes) |
| */ |
| void md5_done(struct md5_state *md5, unsigned char *out) |
| { |
| int i; |
| |
| assert(md5 != NULL); |
| assert(out != NULL); |
| assert(md5->curlen < sizeof(md5->buf)); |
| |
| /* increase the length of the message */ |
| md5->length += md5->curlen * 8; |
| |
| /* append the '1' bit */ |
| md5->buf[md5->curlen++] = (unsigned char)0x80; |
| |
| /* if the length is currently above 56 bytes we append zeros |
| * then compress. Then we can fall back to padding zeros and length |
| * encoding like normal. |
| */ |
| if (md5->curlen > 56) { |
| while (md5->curlen < 64) { |
| md5->buf[md5->curlen++] = (unsigned char)0; |
| } |
| md5_compress(md5, md5->buf); |
| md5->curlen = 0; |
| } |
| |
| /* pad upto 56 bytes of zeroes */ |
| while (md5->curlen < 56) { |
| md5->buf[md5->curlen++] = (unsigned char)0; |
| } |
| |
| /* store length */ |
| STORE64L(md5->length, md5->buf+56); |
| md5_compress(md5, md5->buf); |
| |
| /* copy output */ |
| for (i = 0; i < 4; i++) { |
| STORE32L(md5->state[i], out+(4*i)); |
| } |
| } |
| |
| /* .Source: /cvs/libtom/libtomcrypt/src/hashes/md5.c,v $ */ |
| /* .Revision: 1.10 $ */ |
| /* .Date: 2007/05/12 14:25:28 $ */ |
| |
| /* |
| * End of copied MD5 code. |
| * |
| * ------------------------------------------------------------------------ |
| */ |
| |
| static PyTypeObject MD5type; |
| |
| |
| static MD5object * |
| newMD5object(void) |
| { |
| return (MD5object *)PyObject_New(MD5object, &MD5type); |
| } |
| |
| |
| /* Internal methods for a hash object */ |
| |
| static void |
| MD5_dealloc(PyObject *ptr) |
| { |
| PyObject_Del(ptr); |
| } |
| |
| |
| /* External methods for a hash object */ |
| |
| PyDoc_STRVAR(MD5_copy__doc__, "Return a copy of the hash object."); |
| |
| static PyObject * |
| MD5_copy(MD5object *self, PyObject *unused) |
| { |
| MD5object *newobj; |
| |
| if (Py_TYPE(self) == &MD5type) { |
| if ( (newobj = newMD5object())==NULL) |
| return NULL; |
| } else { |
| if ( (newobj = newMD5object())==NULL) |
| return NULL; |
| } |
| |
| newobj->hash_state = self->hash_state; |
| return (PyObject *)newobj; |
| } |
| |
| PyDoc_STRVAR(MD5_digest__doc__, |
| "Return the digest value as a string of binary data."); |
| |
| static PyObject * |
| MD5_digest(MD5object *self, PyObject *unused) |
| { |
| unsigned char digest[MD5_DIGESTSIZE]; |
| struct md5_state temp; |
| |
| temp = self->hash_state; |
| md5_done(&temp, digest); |
| return PyBytes_FromStringAndSize((const char *)digest, MD5_DIGESTSIZE); |
| } |
| |
| PyDoc_STRVAR(MD5_hexdigest__doc__, |
| "Return the digest value as a string of hexadecimal digits."); |
| |
| static PyObject * |
| MD5_hexdigest(MD5object *self, PyObject *unused) |
| { |
| unsigned char digest[MD5_DIGESTSIZE]; |
| struct md5_state temp; |
| PyObject *retval; |
| Py_UNICODE *hex_digest; |
| int i, j; |
| |
| /* Get the raw (binary) digest value */ |
| temp = self->hash_state; |
| md5_done(&temp, digest); |
| |
| /* Create a new string */ |
| retval = PyUnicode_FromStringAndSize(NULL, MD5_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<MD5_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(MD5_update__doc__, |
| "Update this hash object's state with the provided string."); |
| |
| static PyObject * |
| MD5_update(MD5object *self, PyObject *args) |
| { |
| PyObject *obj; |
| Py_buffer buf; |
| |
| if (!PyArg_ParseTuple(args, "O:update", &obj)) |
| return NULL; |
| |
| GET_BUFFER_VIEW_OR_ERROUT(obj, &buf); |
| |
| md5_process(&self->hash_state, buf.buf, buf.len); |
| |
| PyBuffer_Release(&buf); |
| Py_INCREF(Py_None); |
| return Py_None; |
| } |
| |
| static PyMethodDef MD5_methods[] = { |
| {"copy", (PyCFunction)MD5_copy, METH_NOARGS, MD5_copy__doc__}, |
| {"digest", (PyCFunction)MD5_digest, METH_NOARGS, MD5_digest__doc__}, |
| {"hexdigest", (PyCFunction)MD5_hexdigest, METH_NOARGS, MD5_hexdigest__doc__}, |
| {"update", (PyCFunction)MD5_update, METH_VARARGS, MD5_update__doc__}, |
| {NULL, NULL} /* sentinel */ |
| }; |
| |
| static PyObject * |
| MD5_get_block_size(PyObject *self, void *closure) |
| { |
| return PyLong_FromLong(MD5_BLOCKSIZE); |
| } |
| |
| static PyObject * |
| MD5_get_name(PyObject *self, void *closure) |
| { |
| return PyUnicode_FromStringAndSize("MD5", 3); |
| } |
| |
| static PyObject * |
| md5_get_digest_size(PyObject *self, void *closure) |
| { |
| return PyLong_FromLong(MD5_DIGESTSIZE); |
| } |
| |
| |
| static PyGetSetDef MD5_getseters[] = { |
| {"block_size", |
| (getter)MD5_get_block_size, NULL, |
| NULL, |
| NULL}, |
| {"name", |
| (getter)MD5_get_name, NULL, |
| NULL, |
| NULL}, |
| {"digest_size", |
| (getter)md5_get_digest_size, NULL, |
| NULL, |
| NULL}, |
| {NULL} /* Sentinel */ |
| }; |
| |
| static PyTypeObject MD5type = { |
| PyVarObject_HEAD_INIT(NULL, 0) |
| "_md5.md5", /*tp_name*/ |
| sizeof(MD5object), /*tp_size*/ |
| 0, /*tp_itemsize*/ |
| /* methods */ |
| MD5_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*/ |
| MD5_methods, /* tp_methods */ |
| NULL, /* tp_members */ |
| MD5_getseters, /* tp_getset */ |
| }; |
| |
| |
| /* The single module-level function: new() */ |
| |
| PyDoc_STRVAR(MD5_new__doc__, |
| "Return a new MD5 hash object; optionally initialized with a string."); |
| |
| static PyObject * |
| MD5_new(PyObject *self, PyObject *args, PyObject *kwdict) |
| { |
| static char *kwlist[] = {"string", NULL}; |
| MD5object *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 = newMD5object()) == NULL) { |
| if (data_obj) |
| PyBuffer_Release(&buf); |
| return NULL; |
| } |
| |
| md5_init(&new->hash_state); |
| |
| if (PyErr_Occurred()) { |
| Py_DECREF(new); |
| if (data_obj) |
| PyBuffer_Release(&buf); |
| return NULL; |
| } |
| if (data_obj) { |
| md5_process(&new->hash_state, buf.buf, buf.len); |
| PyBuffer_Release(&buf); |
| } |
| |
| return (PyObject *)new; |
| } |
| |
| |
| /* List of functions exported by this module */ |
| |
| static struct PyMethodDef MD5_functions[] = { |
| {"md5", (PyCFunction)MD5_new, METH_VARARGS|METH_KEYWORDS, MD5_new__doc__}, |
| {NULL, NULL} /* Sentinel */ |
| }; |
| |
| |
| /* Initialize this module. */ |
| |
| #define insint(n,v) { PyModule_AddIntConstant(m,n,v); } |
| |
| |
| static struct PyModuleDef _md5module = { |
| PyModuleDef_HEAD_INIT, |
| "_md5", |
| NULL, |
| -1, |
| MD5_functions, |
| NULL, |
| NULL, |
| NULL, |
| NULL |
| }; |
| |
| PyMODINIT_FUNC |
| PyInit__md5(void) |
| { |
| Py_TYPE(&MD5type) = &PyType_Type; |
| if (PyType_Ready(&MD5type) < 0) |
| return NULL; |
| return PyModule_Create(&_md5module); |
| } |