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5ec7d53558
Automerge-Triggered-By: GH:tiran
738 lines
22 KiB
C
738 lines
22 KiB
C
/* SHA256 module */
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/* This module provides an interface to NIST's SHA-256 and SHA-224 Algorithms */
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/* See below for information about the original code this module was
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based upon. Additional work performed by:
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Andrew Kuchling (amk@amk.ca)
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Greg Stein (gstein@lyra.org)
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Trevor Perrin (trevp@trevp.net)
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Copyright (C) 2005-2007 Gregory P. Smith (greg@krypto.org)
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Licensed to PSF under a Contributor Agreement.
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*/
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/* SHA objects */
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#include "Python.h"
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#include "pycore_bitutils.h" // _Py_bswap32()
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#include "structmember.h" // PyMemberDef
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#include "hashlib.h"
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#include "pystrhex.h"
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/*[clinic input]
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module _sha256
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class SHA256Type "SHAobject *" "&PyType_Type"
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[clinic start generated code]*/
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/*[clinic end generated code: output=da39a3ee5e6b4b0d input=71a39174d4f0a744]*/
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/* Some useful types */
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typedef unsigned char SHA_BYTE;
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typedef uint32_t SHA_INT32; /* 32-bit integer */
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/* The SHA block size and message digest sizes, in bytes */
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#define SHA_BLOCKSIZE 64
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#define SHA_DIGESTSIZE 32
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/* The structure for storing SHA info */
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typedef struct {
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PyObject_HEAD
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SHA_INT32 digest[8]; /* Message digest */
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SHA_INT32 count_lo, count_hi; /* 64-bit bit count */
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SHA_BYTE data[SHA_BLOCKSIZE]; /* SHA data buffer */
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int local; /* unprocessed amount in data */
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int digestsize;
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} SHAobject;
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#include "clinic/sha256module.c.h"
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typedef struct {
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PyTypeObject* sha224_type;
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PyTypeObject* sha256_type;
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} _sha256_state;
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static inline _sha256_state*
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_sha256_get_state(PyObject *module)
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{
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void *state = PyModule_GetState(module);
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assert(state != NULL);
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return (_sha256_state *)state;
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}
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/* When run on a little-endian CPU we need to perform byte reversal on an
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array of longwords. */
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#if PY_LITTLE_ENDIAN
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static void longReverse(SHA_INT32 *buffer, int byteCount)
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{
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byteCount /= sizeof(*buffer);
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for (; byteCount--; buffer++) {
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*buffer = _Py_bswap32(*buffer);
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}
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}
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#endif
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static void SHAcopy(SHAobject *src, SHAobject *dest)
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{
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dest->local = src->local;
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dest->digestsize = src->digestsize;
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dest->count_lo = src->count_lo;
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dest->count_hi = src->count_hi;
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memcpy(dest->digest, src->digest, sizeof(src->digest));
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memcpy(dest->data, src->data, sizeof(src->data));
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}
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/* ------------------------------------------------------------------------
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*
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* This code for the SHA-256 algorithm was noted as public domain. The
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* original headers are pasted below.
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*
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* Several changes have been made to make it more compatible with the
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* Python environment and desired interface.
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*
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*/
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/* LibTomCrypt, modular cryptographic library -- Tom St Denis
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*
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* LibTomCrypt is a library that provides various cryptographic
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* algorithms in a highly modular and flexible manner.
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*
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* The library is free for all purposes without any express
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* guarantee it works.
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*
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* Tom St Denis, tomstdenis@iahu.ca, https://www.libtom.net
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*/
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/* SHA256 by Tom St Denis */
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/* Various logical functions */
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#define ROR(x, y)\
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( ((((unsigned long)(x)&0xFFFFFFFFUL)>>(unsigned long)((y)&31)) | \
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((unsigned long)(x)<<(unsigned long)(32-((y)&31)))) & 0xFFFFFFFFUL)
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#define Ch(x,y,z) (z ^ (x & (y ^ z)))
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#define Maj(x,y,z) (((x | y) & z) | (x & y))
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#define S(x, n) ROR((x),(n))
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#define R(x, n) (((x)&0xFFFFFFFFUL)>>(n))
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#define Sigma0(x) (S(x, 2) ^ S(x, 13) ^ S(x, 22))
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#define Sigma1(x) (S(x, 6) ^ S(x, 11) ^ S(x, 25))
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#define Gamma0(x) (S(x, 7) ^ S(x, 18) ^ R(x, 3))
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#define Gamma1(x) (S(x, 17) ^ S(x, 19) ^ R(x, 10))
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static void
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sha_transform(SHAobject *sha_info)
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{
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int i;
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SHA_INT32 S[8], W[64], t0, t1;
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memcpy(W, sha_info->data, sizeof(sha_info->data));
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#if PY_LITTLE_ENDIAN
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longReverse(W, (int)sizeof(sha_info->data));
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#endif
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for (i = 16; i < 64; ++i) {
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W[i] = Gamma1(W[i - 2]) + W[i - 7] + Gamma0(W[i - 15]) + W[i - 16];
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}
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for (i = 0; i < 8; ++i) {
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S[i] = sha_info->digest[i];
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}
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/* Compress */
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#define RND(a,b,c,d,e,f,g,h,i,ki) \
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t0 = h + Sigma1(e) + Ch(e, f, g) + ki + W[i]; \
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t1 = Sigma0(a) + Maj(a, b, c); \
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d += t0; \
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h = t0 + t1;
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RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],0,0x428a2f98);
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RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],1,0x71374491);
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RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],2,0xb5c0fbcf);
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RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],3,0xe9b5dba5);
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RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],4,0x3956c25b);
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RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],5,0x59f111f1);
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RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],6,0x923f82a4);
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RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],7,0xab1c5ed5);
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RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],8,0xd807aa98);
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RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],9,0x12835b01);
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RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],10,0x243185be);
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RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],11,0x550c7dc3);
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RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],12,0x72be5d74);
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RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],13,0x80deb1fe);
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RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],14,0x9bdc06a7);
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RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],15,0xc19bf174);
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RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],16,0xe49b69c1);
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RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],17,0xefbe4786);
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RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],18,0x0fc19dc6);
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RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],19,0x240ca1cc);
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RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],20,0x2de92c6f);
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RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],21,0x4a7484aa);
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RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],22,0x5cb0a9dc);
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RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],23,0x76f988da);
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RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],24,0x983e5152);
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RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],25,0xa831c66d);
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RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],26,0xb00327c8);
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RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],27,0xbf597fc7);
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RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],28,0xc6e00bf3);
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RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],29,0xd5a79147);
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RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],30,0x06ca6351);
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RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],31,0x14292967);
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RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],32,0x27b70a85);
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RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],33,0x2e1b2138);
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RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],34,0x4d2c6dfc);
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RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],35,0x53380d13);
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RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],36,0x650a7354);
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RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],37,0x766a0abb);
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RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],38,0x81c2c92e);
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RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],39,0x92722c85);
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RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],40,0xa2bfe8a1);
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RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],41,0xa81a664b);
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RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],42,0xc24b8b70);
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RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],43,0xc76c51a3);
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RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],44,0xd192e819);
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RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],45,0xd6990624);
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RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],46,0xf40e3585);
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RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],47,0x106aa070);
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RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],48,0x19a4c116);
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RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],49,0x1e376c08);
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RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],50,0x2748774c);
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RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],51,0x34b0bcb5);
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RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],52,0x391c0cb3);
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RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],53,0x4ed8aa4a);
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RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],54,0x5b9cca4f);
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RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],55,0x682e6ff3);
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RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],56,0x748f82ee);
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RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],57,0x78a5636f);
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RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],58,0x84c87814);
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RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],59,0x8cc70208);
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RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],60,0x90befffa);
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RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],61,0xa4506ceb);
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RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],62,0xbef9a3f7);
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RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],63,0xc67178f2);
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#undef RND
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/* feedback */
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for (i = 0; i < 8; i++) {
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sha_info->digest[i] = sha_info->digest[i] + S[i];
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}
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}
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/* initialize the SHA digest */
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static void
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sha_init(SHAobject *sha_info)
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{
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sha_info->digest[0] = 0x6A09E667L;
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sha_info->digest[1] = 0xBB67AE85L;
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sha_info->digest[2] = 0x3C6EF372L;
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sha_info->digest[3] = 0xA54FF53AL;
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sha_info->digest[4] = 0x510E527FL;
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sha_info->digest[5] = 0x9B05688CL;
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sha_info->digest[6] = 0x1F83D9ABL;
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sha_info->digest[7] = 0x5BE0CD19L;
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sha_info->count_lo = 0L;
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sha_info->count_hi = 0L;
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sha_info->local = 0;
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sha_info->digestsize = 32;
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}
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static void
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sha224_init(SHAobject *sha_info)
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{
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sha_info->digest[0] = 0xc1059ed8L;
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sha_info->digest[1] = 0x367cd507L;
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sha_info->digest[2] = 0x3070dd17L;
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sha_info->digest[3] = 0xf70e5939L;
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sha_info->digest[4] = 0xffc00b31L;
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sha_info->digest[5] = 0x68581511L;
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sha_info->digest[6] = 0x64f98fa7L;
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sha_info->digest[7] = 0xbefa4fa4L;
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sha_info->count_lo = 0L;
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sha_info->count_hi = 0L;
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sha_info->local = 0;
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sha_info->digestsize = 28;
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}
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/* update the SHA digest */
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static void
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sha_update(SHAobject *sha_info, SHA_BYTE *buffer, Py_ssize_t count)
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{
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Py_ssize_t i;
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SHA_INT32 clo;
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clo = sha_info->count_lo + ((SHA_INT32) count << 3);
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if (clo < sha_info->count_lo) {
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++sha_info->count_hi;
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}
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sha_info->count_lo = clo;
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sha_info->count_hi += (SHA_INT32) count >> 29;
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if (sha_info->local) {
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i = SHA_BLOCKSIZE - sha_info->local;
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if (i > count) {
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i = count;
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}
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memcpy(((SHA_BYTE *) sha_info->data) + sha_info->local, buffer, i);
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count -= i;
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buffer += i;
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sha_info->local += (int)i;
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if (sha_info->local == SHA_BLOCKSIZE) {
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sha_transform(sha_info);
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}
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else {
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return;
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}
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}
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while (count >= SHA_BLOCKSIZE) {
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memcpy(sha_info->data, buffer, SHA_BLOCKSIZE);
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buffer += SHA_BLOCKSIZE;
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count -= SHA_BLOCKSIZE;
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sha_transform(sha_info);
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}
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memcpy(sha_info->data, buffer, count);
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sha_info->local = (int)count;
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}
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/* finish computing the SHA digest */
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static void
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sha_final(unsigned char digest[SHA_DIGESTSIZE], SHAobject *sha_info)
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{
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int count;
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SHA_INT32 lo_bit_count, hi_bit_count;
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lo_bit_count = sha_info->count_lo;
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hi_bit_count = sha_info->count_hi;
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count = (int) ((lo_bit_count >> 3) & 0x3f);
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((SHA_BYTE *) sha_info->data)[count++] = 0x80;
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if (count > SHA_BLOCKSIZE - 8) {
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memset(((SHA_BYTE *) sha_info->data) + count, 0,
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SHA_BLOCKSIZE - count);
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sha_transform(sha_info);
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memset((SHA_BYTE *) sha_info->data, 0, SHA_BLOCKSIZE - 8);
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}
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else {
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memset(((SHA_BYTE *) sha_info->data) + count, 0,
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SHA_BLOCKSIZE - 8 - count);
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}
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/* GJS: note that we add the hi/lo in big-endian. sha_transform will
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swap these values into host-order. */
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sha_info->data[56] = (hi_bit_count >> 24) & 0xff;
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sha_info->data[57] = (hi_bit_count >> 16) & 0xff;
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sha_info->data[58] = (hi_bit_count >> 8) & 0xff;
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sha_info->data[59] = (hi_bit_count >> 0) & 0xff;
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sha_info->data[60] = (lo_bit_count >> 24) & 0xff;
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sha_info->data[61] = (lo_bit_count >> 16) & 0xff;
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sha_info->data[62] = (lo_bit_count >> 8) & 0xff;
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sha_info->data[63] = (lo_bit_count >> 0) & 0xff;
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sha_transform(sha_info);
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digest[ 0] = (unsigned char) ((sha_info->digest[0] >> 24) & 0xff);
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digest[ 1] = (unsigned char) ((sha_info->digest[0] >> 16) & 0xff);
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digest[ 2] = (unsigned char) ((sha_info->digest[0] >> 8) & 0xff);
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digest[ 3] = (unsigned char) ((sha_info->digest[0] ) & 0xff);
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|
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 SHAobject *
|
|
newSHA224object(_sha256_state *state)
|
|
{
|
|
return (SHAobject *)PyObject_New(SHAobject, state->sha224_type);
|
|
}
|
|
|
|
static SHAobject *
|
|
newSHA256object(_sha256_state *state)
|
|
{
|
|
return (SHAobject *)PyObject_New(SHAobject, state->sha256_type);
|
|
}
|
|
|
|
/* Internal methods for a hash object */
|
|
|
|
static void
|
|
SHA_dealloc(PyObject *ptr)
|
|
{
|
|
PyTypeObject *tp = Py_TYPE(ptr);
|
|
PyObject_Free(ptr);
|
|
Py_DECREF(tp);
|
|
}
|
|
|
|
|
|
/* External methods for a hash object */
|
|
|
|
/*[clinic input]
|
|
SHA256Type.copy
|
|
|
|
cls:defining_class
|
|
|
|
Return a copy of the hash object.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
SHA256Type_copy_impl(SHAobject *self, PyTypeObject *cls)
|
|
/*[clinic end generated code: output=9273f92c382be12f input=3137146fcb88e212]*/
|
|
{
|
|
SHAobject *newobj;
|
|
_sha256_state *state = PyType_GetModuleState(cls);
|
|
if (Py_IS_TYPE(self, state->sha256_type)) {
|
|
if ( (newobj = newSHA256object(state)) == NULL) {
|
|
return NULL;
|
|
}
|
|
} else {
|
|
if ( (newobj = newSHA224object(state))==NULL) {
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
SHAcopy(self, newobj);
|
|
return (PyObject *)newobj;
|
|
}
|
|
|
|
/*[clinic input]
|
|
SHA256Type.digest
|
|
|
|
Return the digest value as a bytes object.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
SHA256Type_digest_impl(SHAobject *self)
|
|
/*[clinic end generated code: output=46616a5e909fbc3d input=f1f4cfea5cbde35c]*/
|
|
{
|
|
unsigned char digest[SHA_DIGESTSIZE];
|
|
SHAobject temp;
|
|
|
|
SHAcopy(self, &temp);
|
|
sha_final(digest, &temp);
|
|
return PyBytes_FromStringAndSize((const char *)digest, self->digestsize);
|
|
}
|
|
|
|
/*[clinic input]
|
|
SHA256Type.hexdigest
|
|
|
|
Return the digest value as a string of hexadecimal digits.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
SHA256Type_hexdigest_impl(SHAobject *self)
|
|
/*[clinic end generated code: output=725f8a7041ae97f3 input=0cc4c714693010d1]*/
|
|
{
|
|
unsigned char digest[SHA_DIGESTSIZE];
|
|
SHAobject temp;
|
|
|
|
/* Get the raw (binary) digest value */
|
|
SHAcopy(self, &temp);
|
|
sha_final(digest, &temp);
|
|
|
|
return _Py_strhex((const char *)digest, self->digestsize);
|
|
}
|
|
|
|
/*[clinic input]
|
|
SHA256Type.update
|
|
|
|
obj: object
|
|
/
|
|
|
|
Update this hash object's state with the provided string.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
SHA256Type_update(SHAobject *self, PyObject *obj)
|
|
/*[clinic end generated code: output=0967fb2860c66af7 input=b2d449d5b30f0f5a]*/
|
|
{
|
|
Py_buffer buf;
|
|
|
|
GET_BUFFER_VIEW_OR_ERROUT(obj, &buf);
|
|
|
|
sha_update(self, buf.buf, buf.len);
|
|
|
|
PyBuffer_Release(&buf);
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
static PyMethodDef SHA_methods[] = {
|
|
SHA256TYPE_COPY_METHODDEF
|
|
SHA256TYPE_DIGEST_METHODDEF
|
|
SHA256TYPE_HEXDIGEST_METHODDEF
|
|
SHA256TYPE_UPDATE_METHODDEF
|
|
{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 PyType_Slot sha256_types_slots[] = {
|
|
{Py_tp_dealloc, SHA_dealloc},
|
|
{Py_tp_methods, SHA_methods},
|
|
{Py_tp_members, SHA_members},
|
|
{Py_tp_getset, SHA_getseters},
|
|
{0,0}
|
|
};
|
|
|
|
static PyType_Spec sha224_type_spec = {
|
|
.name = "_sha256.sha224",
|
|
.basicsize = sizeof(SHAobject),
|
|
.flags = Py_TPFLAGS_DEFAULT,
|
|
.slots = sha256_types_slots
|
|
};
|
|
|
|
static PyType_Spec sha256_type_spec = {
|
|
.name = "_sha256.sha256",
|
|
.basicsize = sizeof(SHAobject),
|
|
.flags = Py_TPFLAGS_DEFAULT,
|
|
.slots = sha256_types_slots
|
|
};
|
|
|
|
/* The single module-level function: new() */
|
|
|
|
/*[clinic input]
|
|
_sha256.sha256
|
|
|
|
string: object(c_default="NULL") = b''
|
|
*
|
|
usedforsecurity: bool = True
|
|
|
|
Return a new SHA-256 hash object; optionally initialized with a string.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_sha256_sha256_impl(PyObject *module, PyObject *string, int usedforsecurity)
|
|
/*[clinic end generated code: output=a1de327e8e1185cf input=9be86301aeb14ea5]*/
|
|
{
|
|
Py_buffer buf;
|
|
|
|
if (string) {
|
|
GET_BUFFER_VIEW_OR_ERROUT(string, &buf);
|
|
}
|
|
|
|
_sha256_state *state = PyModule_GetState(module);
|
|
|
|
SHAobject *new;
|
|
if ((new = newSHA256object(state)) == NULL) {
|
|
if (string) {
|
|
PyBuffer_Release(&buf);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
sha_init(new);
|
|
|
|
if (PyErr_Occurred()) {
|
|
Py_DECREF(new);
|
|
if (string) {
|
|
PyBuffer_Release(&buf);
|
|
}
|
|
return NULL;
|
|
}
|
|
if (string) {
|
|
sha_update(new, buf.buf, buf.len);
|
|
PyBuffer_Release(&buf);
|
|
}
|
|
|
|
return (PyObject *)new;
|
|
}
|
|
|
|
/*[clinic input]
|
|
_sha256.sha224
|
|
|
|
string: object(c_default="NULL") = b''
|
|
*
|
|
usedforsecurity: bool = True
|
|
|
|
Return a new SHA-224 hash object; optionally initialized with a string.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_sha256_sha224_impl(PyObject *module, PyObject *string, int usedforsecurity)
|
|
/*[clinic end generated code: output=08be6b36569bc69c input=9fcfb46e460860ac]*/
|
|
{
|
|
Py_buffer buf;
|
|
if (string) {
|
|
GET_BUFFER_VIEW_OR_ERROUT(string, &buf);
|
|
}
|
|
|
|
_sha256_state *state = PyModule_GetState(module);
|
|
SHAobject *new;
|
|
if ((new = newSHA224object(state)) == NULL) {
|
|
if (string) {
|
|
PyBuffer_Release(&buf);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
sha224_init(new);
|
|
|
|
if (PyErr_Occurred()) {
|
|
Py_DECREF(new);
|
|
if (string) {
|
|
PyBuffer_Release(&buf);
|
|
}
|
|
return NULL;
|
|
}
|
|
if (string) {
|
|
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_SHA256_METHODDEF
|
|
_SHA256_SHA224_METHODDEF
|
|
{NULL, NULL} /* Sentinel */
|
|
};
|
|
|
|
static int
|
|
_sha256_traverse(PyObject *module, visitproc visit, void *arg)
|
|
{
|
|
_sha256_state *state = _sha256_get_state(module);
|
|
Py_VISIT(state->sha224_type);
|
|
Py_VISIT(state->sha256_type);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
_sha256_clear(PyObject *module)
|
|
{
|
|
_sha256_state *state = _sha256_get_state(module);
|
|
Py_CLEAR(state->sha224_type);
|
|
Py_CLEAR(state->sha256_type);
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
_sha256_free(void *module)
|
|
{
|
|
_sha256_clear((PyObject *)module);
|
|
}
|
|
|
|
static int sha256_exec(PyObject *module)
|
|
{
|
|
_sha256_state *state = _sha256_get_state(module);
|
|
|
|
state->sha224_type = (PyTypeObject *)PyType_FromModuleAndSpec(
|
|
module, &sha224_type_spec, NULL);
|
|
|
|
if (state->sha224_type == NULL) {
|
|
return -1;
|
|
}
|
|
|
|
state->sha256_type = (PyTypeObject *)PyType_FromModuleAndSpec(
|
|
module, &sha256_type_spec, NULL);
|
|
|
|
if (state->sha256_type == NULL) {
|
|
return -1;
|
|
}
|
|
|
|
Py_INCREF((PyObject *)state->sha224_type);
|
|
if (PyModule_AddObject(module, "SHA224Type", (PyObject *)state->sha224_type) < 0) {
|
|
Py_DECREF((PyObject *)state->sha224_type);
|
|
return -1;
|
|
}
|
|
Py_INCREF((PyObject *)state->sha256_type);
|
|
if (PyModule_AddObject(module, "SHA256Type", (PyObject *)state->sha256_type) < 0) {
|
|
Py_DECREF((PyObject *)state->sha256_type);
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static PyModuleDef_Slot _sha256_slots[] = {
|
|
{Py_mod_exec, sha256_exec},
|
|
{0, NULL}
|
|
};
|
|
|
|
static struct PyModuleDef _sha256module = {
|
|
PyModuleDef_HEAD_INIT,
|
|
.m_name = "_sha256",
|
|
.m_size = sizeof(_sha256_state),
|
|
.m_methods = SHA_functions,
|
|
.m_slots = _sha256_slots,
|
|
.m_traverse = _sha256_traverse,
|
|
.m_clear = _sha256_clear,
|
|
.m_free = _sha256_free
|
|
};
|
|
|
|
/* Initialize this module. */
|
|
PyMODINIT_FUNC
|
|
PyInit__sha256(void)
|
|
{
|
|
return PyModuleDef_Init(&_sha256module);
|
|
}
|