#include "Python.h"

#include "structmember.h"

#include "hashlib.h"

#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

typedef unsigned char SHA_BYTE;

#if SIZEOF_INT == 4

typedef unsigned int SHA_INT32; /* 32-bit integer */

#define SHA_BLOCKSIZE 64

#define SHA_DIGESTSIZE 32

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;

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));

}

#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];

}

}

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;

}

static void

sha_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 += 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;

}

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

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);

}

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);

}

static void

SHA_dealloc(PyObject *ptr)

{

PyObject_Del(ptr);

}

PyDoc_STRVAR(SHA256_copy__doc__, "Return a copy of the hash object.");

static PyObject *

SHA256_copy(SHAobject *self, PyObject *unused)

{

SHAobject *newobj;

if (Py_TYPE(self) == &SHA256type) {

if ( (newobj = newSHA256object())==NULL)

return NULL;

} else {

if ( (newobj = newSHA224object())==NULL)

return NULL;

}

SHAcopy(self, newobj);

return (PyObject *)newobj;

}

PyDoc_STRVAR(SHA256_digest__doc__,

"Return the digest value as a string of binary data.");

static PyObject *

SHA256_digest(SHAobject *self, PyObject *unused)

{

unsigned char digest[SHA_DIGESTSIZE];

SHAobject temp;

SHAcopy(self, &temp);

sha_final(digest, &temp);

return PyBytes_FromStringAndSize((const char *)digest, self->digestsize);

}

PyDoc_STRVAR(SHA256_hexdigest__doc__,

"Return the digest value as a string of hexadecimal digits.");

static PyObject *

SHA256_hexdigest(SHAobject *self, PyObject *unused)

{

unsigned char digest[SHA_DIGESTSIZE];

SHAobject temp;

PyObject *retval;

Py_UCS1 *hex_digest;

int i, j;

/* Get the raw (binary) digest value */

SHAcopy(self, &temp);

sha_final(digest, &temp);

/* Create a new string */

retval = PyUnicode_New(self->digestsize * 2, 127);

if (!retval)

return NULL;

hex_digest = PyUnicode_1BYTE_DATA(retval);

/* Make hex version of the digest */

for(i=j=0; i<self->digestsize; i++) {

unsigned char c;

c = (digest[i] >> 4) & 0xf;

hex_digest[j++] = Py_hexdigits[c];

c = (digest[i] & 0xf);

hex_digest[j++] = Py_hexdigits[c];

}

#ifdef Py_DEBUG

assert(_PyUnicode_CheckConsistency(retval, 1));

return retval;

}

PyDoc_STRVAR(SHA256_update__doc__,

"Update this hash object's state with the provided string.");

static PyObject *

SHA256_update(SHAobject *self, PyObject *args)

{

PyObject *obj;

Py_buffer buf;

if (!PyArg_ParseTuple(args, "O:update", &obj))

return NULL;

GET_BUFFER_VIEW_OR_ERROUT(obj, &buf);

sha_update(self, buf.buf, buf.len);

PyBuffer_Release(&buf);

Py_INCREF(Py_None);

return Py_None;

}

static PyMethodDef SHA_methods[] = {

{"copy", (PyCFunction)SHA256_copy, METH_NOARGS, SHA256_copy__doc__},

{"digest", (PyCFunction)SHA256_digest, METH_NOARGS, SHA256_digest__doc__},

{"hexdigest", (PyCFunction)SHA256_hexdigest, METH_NOARGS, SHA256_hexdigest__doc__},

{"update", (PyCFunction)SHA256_update, METH_VARARGS, SHA256_update__doc__},

{NULL, NULL} /* sentinel */

};

static PyObject *

SHA256_get_block_size(PyObject *self, void *closure)

{

return PyLong_FromLong(SHA_BLOCKSIZE);

}

static PyObject *

SHA256_get_name(PyObject *self, void *closure)

{

if (((SHAobject *)self)->digestsize == 32)

return PyUnicode_FromStringAndSize("SHA256", 6);

else

return PyUnicode_FromStringAndSize("SHA224", 6);

}

static PyGetSetDef SHA_getseters[] = {

{"block_size",

(getter)SHA256_get_block_size, NULL,

NULL,

NULL},

{"name",

(getter)SHA256_get_name, NULL,

NULL,

NULL},

{NULL} /* Sentinel */

};

static PyMemberDef SHA_members[] = {

{"digest_size", T_INT, offsetof(SHAobject, digestsize), READONLY, NULL},

{NULL} /* Sentinel */

};

static PyTypeObject SHA224type = {

PyVarObject_HEAD_INIT(NULL, 0)

"_sha256.sha224", /*tp_name*/

sizeof(SHAobject), /*tp_size*/

0, /*tp_itemsize*/

/* methods */

SHA_dealloc, /*tp_dealloc*/

0, /*tp_print*/

0, /*tp_getattr*/

0, /*tp_setattr*/

0, /*tp_reserved*/

0, /*tp_repr*/

0, /*tp_as_number*/

0, /*tp_as_sequence*/

0, /*tp_as_mapping*/

0, /*tp_hash*/

0, /*tp_call*/

0, /*tp_str*/

0, /*tp_getattro*/

0, /*tp_setattro*/

0, /*tp_as_buffer*/

Py_TPFLAGS_DEFAULT, /*tp_flags*/

0, /*tp_doc*/

0, /*tp_traverse*/

0, /*tp_clear*/

0, /*tp_richcompare*/

0, /*tp_weaklistoffset*/

0, /*tp_iter*/

0, /*tp_iternext*/

SHA_methods, /* tp_methods */

SHA_members, /* tp_members */

SHA_getseters, /* tp_getset */

};

static PyTypeObject SHA256type = {

PyVarObject_HEAD_INIT(NULL, 0)

"_sha256.sha256", /*tp_name*/

sizeof(SHAobject), /*tp_size*/

0, /*tp_itemsize*/

/* methods */

SHA_dealloc, /*tp_dealloc*/

0, /*tp_print*/

0, /*tp_getattr*/

0, /*tp_setattr*/

0, /*tp_reserved*/

0, /*tp_repr*/

0, /*tp_as_number*/

0, /*tp_as_sequence*/

0, /*tp_as_mapping*/

0, /*tp_hash*/

0, /*tp_call*/

0, /*tp_str*/

0, /*tp_getattro*/

0, /*tp_setattro*/

0, /*tp_as_buffer*/

Py_TPFLAGS_DEFAULT, /*tp_flags*/

0, /*tp_doc*/

0, /*tp_traverse*/

0, /*tp_clear*/

0, /*tp_richcompare*/

0, /*tp_weaklistoffset*/

0, /*tp_iter*/

0, /*tp_iternext*/

SHA_methods, /* tp_methods */

SHA_members, /* tp_members */

SHA_getseters, /* tp_getset */

};

PyDoc_STRVAR(SHA256_new__doc__,

"Return a new SHA-256 hash object; optionally initialized with a string.");

static PyObject *

SHA256_new(PyObject *self, PyObject *args, PyObject *kwdict)

{

static char *kwlist[] = {"string", NULL};

SHAobject *new;

PyObject *data_obj = NULL;

Py_buffer buf;

if (!PyArg_ParseTupleAndKeywords(args, kwdict, "|O:new", kwlist,

&data_obj)) {

return NULL;

}

if (data_obj)

GET_BUFFER_VIEW_OR_ERROUT(data_obj, &buf);

if ((new = newSHA256object()) == NULL) {

if (data_obj)

PyBuffer_Release(&buf);

return NULL;

}

sha_init(new);

if (PyErr_Occurred()) {

Py_DECREF(new);

if (data_obj)

PyBuffer_Release(&buf);

return NULL;

}

if (data_obj) {

sha_update(new, buf.buf, buf.len);

PyBuffer_Release(&buf);

}

return (PyObject *)new;

}

PyDoc_STRVAR(SHA224_new__doc__,

"Return a new SHA-224 hash object; optionally initialized with a string.");

static PyObject *

SHA224_new(PyObject *self, PyObject *args, PyObject *kwdict)

{

static char *kwlist[] = {"string", NULL};

SHAobject *new;

PyObject *data_obj = NULL;

Py_buffer buf;

if (!PyArg_ParseTupleAndKeywords(args, kwdict, "|O:new", kwlist,

&data_obj)) {

return NULL;

}

if (data_obj)

GET_BUFFER_VIEW_OR_ERROUT(data_obj, &buf);

if ((new = newSHA224object()) == NULL) {

if (data_obj)

PyBuffer_Release(&buf);

return NULL;

}

sha224_init(new);

if (PyErr_Occurred()) {

Py_DECREF(new);

if (data_obj)

PyBuffer_Release(&buf);

return NULL;

}

if (data_obj) {

sha_update(new, buf.buf, buf.len);

PyBuffer_Release(&buf);

}

return (PyObject *)new;

}

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 */

};

#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

};

PyInit__sha256(void)

{

Py_TYPE(&SHA224type) = &PyType_Type;

if (PyType_Ready(&SHA224type) < 0)

return NULL;

Py_TYPE(&SHA256type) = &PyType_Type;

if (PyType_Ready(&SHA256type) < 0)

return NULL;

return PyModule_Create(&_sha256module);

}