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/* 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 wasbased 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"#include "pystrhex.h"/*[clinic input]module _sha256class SHA256Type "SHAobject *" "&PyType_Type"[clinic start generated code]*//*[clinic end generated code: output=da39a3ee5e6b4b0d input=71a39174d4f0a744]*//* Some useful types */typedef unsigned char SHA_BYTE;#if SIZEOF_INT == 4typedef 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_HEADSHA_INT32 digest[8]; /* Message digest */SHA_INT32 count_lo, count_hi; /* 64-bit bit count */SHA_BYTE data[SHA_BLOCKSIZE]; /* SHA data buffer */int local; /* unprocessed amount in data */int digestsize;} SHAobject;#include "clinic/sha256module.c.h"/* When run on a little-endian CPU we need to perform byte reversal on anarray of longwords. */#if PY_LITTLE_ENDIANstatic void longReverse(SHA_INT32 *buffer, int byteCount){SHA_INT32 value;byteCount /= sizeof(*buffer);while (byteCount--) {value = *buffer;value = ( ( value & 0xFF00FF00L ) >> 8 ) | \( ( value & 0x00FF00FFL ) << 8 );*buffer++ = ( value << 16 ) | ( value >> 16 );}}#endifstatic void SHAcopy(SHAobject *src, SHAobject *dest){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* guarantee it works.** Tom St Denis, tomstdenis@iahu.ca, https://www.libtom.net*//* 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 voidsha_transform(SHAobject *sha_info){int i;SHA_INT32 S[8], W[64], t0, t1;memcpy(W, sha_info->data, sizeof(sha_info->data));#if PY_LITTLE_ENDIANlongReverse(W, (int)sizeof(sha_info->data));#endiffor (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 voidsha_init(SHAobject *sha_info){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 voidsha224_init(SHAobject *sha_info){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 voidsha_update(SHAobject *sha_info, SHA_BYTE *buffer, Py_ssize_t count){Py_ssize_t 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 += (int)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 = (int)count;}/* finish computing the SHA digest */static voidsha_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 willswap 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 voidSHA_dealloc(PyObject *ptr){PyObject_Del(ptr);}/* External methods for a hash object *//*[clinic input]SHA256Type.copyReturn a copy of the hash object.[clinic start generated code]*/static PyObject *SHA256Type_copy_impl(SHAobject *self)/*[clinic end generated code: output=1a8bbd66a0c9c168 input=f58840a618d4f2a7]*/{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;}/*[clinic input]SHA256Type.digestReturn 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.hexdigestReturn 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.updateobj: 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_METHODDEFSHA256TYPE_DIGEST_METHODDEFSHA256TYPE_HEXDIGEST_METHODDEFSHA256TYPE_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);elsereturn 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_basicsize*/0, /*tp_itemsize*//* methods */SHA_dealloc, /*tp_dealloc*/0, /*tp_vectorcall_offset*/0, /*tp_getattr*/0, /*tp_setattr*/0, /*tp_as_async*/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_basicsize*/0, /*tp_itemsize*//* methods */SHA_dealloc, /*tp_dealloc*/0, /*tp_vectorcall_offset*/0, /*tp_getattr*/0, /*tp_setattr*/0, /*tp_as_async*/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() *//*[clinic input]_sha256.sha256string: object(c_default="NULL") = b''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)/*[clinic end generated code: output=fa644436dcea5c31 input=09cce3fb855056b2]*/{SHAobject *new;Py_buffer buf;if (string)GET_BUFFER_VIEW_OR_ERROUT(string, &buf);if ((new = newSHA256object()) == 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.sha224string: object(c_default="NULL") = b''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)/*[clinic end generated code: output=21e3ba22c3404f93 input=27a04ba24c353a73]*/{SHAobject *new;Py_buffer buf;if (string)GET_BUFFER_VIEW_OR_ERROUT(string, &buf);if ((new = newSHA224object()) == 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 */};/* 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_FUNCPyInit__sha256(void){PyObject *m;Py_TYPE(&SHA224type) = &PyType_Type;if (PyType_Ready(&SHA224type) < 0)return NULL;Py_TYPE(&SHA256type) = &PyType_Type;if (PyType_Ready(&SHA256type) < 0)return NULL;m = PyModule_Create(&_sha256module);if (m == NULL)return NULL;Py_INCREF((PyObject *)&SHA224type);PyModule_AddObject(m, "SHA224Type", (PyObject *)&SHA224type);Py_INCREF((PyObject *)&SHA256type);PyModule_AddObject(m, "SHA256Type", (PyObject *)&SHA256type);return m;}
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