/* 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 Gregory P. Smith (greg@krypto.org) | |
Licensed to PSF under a Contributor Agreement. | |
*/ | |
/* SHA objects */ | |
#include "Python.h" | |
#include "structmember.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://libtomcrypt.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 PyString_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; | |
char *hex_digest; | |
int i, j; | |
/* Get the raw (binary) digest value */ | |
SHAcopy(self, &temp); | |
sha_final(digest, &temp); | |
/* Create a new string */ | |
retval = PyString_FromStringAndSize(NULL, self->digestsize * 2); | |
if (!retval) | |
return NULL; | |
hex_digest = PyString_AsString(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) | |
{ | |
Py_buffer buf; | |
if (!PyArg_ParseTuple(args, "s*:update", &buf)) | |
return NULL; | |
sha_update(self, buf.buf, buf.len); | |
PyBuffer_Release(&buf); | |
Py_RETURN_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 PyInt_FromLong(SHA_BLOCKSIZE); | |
} | |
static PyObject * | |
SHA256_get_name(PyObject *self, void *closure) | |
{ | |
if (((SHAobject *)self)->digestsize == 32) | |
return PyString_FromStringAndSize("SHA256", 6); | |
else | |
return PyString_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}, | |
/* the old md5 and sha modules support 'digest_size' as in PEP 247. | |
* the old sha module also supported 'digestsize'. ugh. */ | |
{"digestsize", 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_compare*/ | |
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_compare*/ | |
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; | |
Py_buffer buf = { 0 }; | |
if (!PyArg_ParseTupleAndKeywords(args, kwdict, "|s*:new", kwlist, | |
&buf)) { | |
return NULL; | |
} | |
if ((new = newSHA256object()) == NULL) { | |
PyBuffer_Release(&buf); | |
return NULL; | |
} | |
sha_init(new); | |
if (PyErr_Occurred()) { | |
Py_DECREF(new); | |
PyBuffer_Release(&buf); | |
return NULL; | |
} | |
if (buf.len > 0) { | |
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; | |
Py_buffer buf = { 0 }; | |
if (!PyArg_ParseTupleAndKeywords(args, kwdict, "|s*:new", kwlist, | |
&buf)) { | |
return NULL; | |
} | |
if ((new = newSHA224object()) == NULL) { | |
PyBuffer_Release(&buf); | |
return NULL; | |
} | |
sha224_init(new); | |
if (PyErr_Occurred()) { | |
Py_DECREF(new); | |
PyBuffer_Release(&buf); | |
return NULL; | |
} | |
if (buf.len > 0) { | |
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); } | |
PyMODINIT_FUNC | |
init_sha256(void) | |
{ | |
PyObject *m; | |
Py_TYPE(&SHA224type) = &PyType_Type; | |
if (PyType_Ready(&SHA224type) < 0) | |
return; | |
Py_TYPE(&SHA256type) = &PyType_Type; | |
if (PyType_Ready(&SHA256type) < 0) | |
return; | |
m = Py_InitModule("_sha256", SHA_functions); | |
if (m == NULL) | |
return; | |
} |