diff options
Diffstat (limited to 'wsutil/sha2.c')
-rw-r--r-- | wsutil/sha2.c | 281 |
1 files changed, 0 insertions, 281 deletions
diff --git a/wsutil/sha2.c b/wsutil/sha2.c deleted file mode 100644 index 2466d7d4f6..0000000000 --- a/wsutil/sha2.c +++ /dev/null @@ -1,281 +0,0 @@ -/* - * FIPS-180-2 compliant SHA-2 implementation (only sha256 so far) - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - * - */ -#include <string.h> -#include <glib.h> - -#include "sha2.h" - -/* the K array */ -static const guint32 K[64] = { - 0x428a2f98UL, 0x71374491UL, 0xb5c0fbcfUL, 0xe9b5dba5UL, 0x3956c25bUL, - 0x59f111f1UL, 0x923f82a4UL, 0xab1c5ed5UL, 0xd807aa98UL, 0x12835b01UL, - 0x243185beUL, 0x550c7dc3UL, 0x72be5d74UL, 0x80deb1feUL, 0x9bdc06a7UL, - 0xc19bf174UL, 0xe49b69c1UL, 0xefbe4786UL, 0x0fc19dc6UL, 0x240ca1ccUL, - 0x2de92c6fUL, 0x4a7484aaUL, 0x5cb0a9dcUL, 0x76f988daUL, 0x983e5152UL, - 0xa831c66dUL, 0xb00327c8UL, 0xbf597fc7UL, 0xc6e00bf3UL, 0xd5a79147UL, - 0x06ca6351UL, 0x14292967UL, 0x27b70a85UL, 0x2e1b2138UL, 0x4d2c6dfcUL, - 0x53380d13UL, 0x650a7354UL, 0x766a0abbUL, 0x81c2c92eUL, 0x92722c85UL, - 0xa2bfe8a1UL, 0xa81a664bUL, 0xc24b8b70UL, 0xc76c51a3UL, 0xd192e819UL, - 0xd6990624UL, 0xf40e3585UL, 0x106aa070UL, 0x19a4c116UL, 0x1e376c08UL, - 0x2748774cUL, 0x34b0bcb5UL, 0x391c0cb3UL, 0x4ed8aa4aUL, 0x5b9cca4fUL, - 0x682e6ff3UL, 0x748f82eeUL, 0x78a5636fUL, 0x84c87814UL, 0x8cc70208UL, - 0x90befffaUL, 0xa4506cebUL, 0xbef9a3f7UL, 0xc67178f2UL -}; - - -#define GET_UINT32(n,b,i) \ - { \ - (n) = ( (guint32) (b)[(i) ] << 24 ) \ - | ( (guint32) (b)[(i) + 1] << 16 ) \ - | ( (guint32) (b)[(i) + 2] << 8 ) \ - | ( (guint32) (b)[(i) + 3] ); \ - } - -#define PUT_UINT32(n,b,i) \ - { \ - (b)[(i) ] = (guint8) ( (n) >> 24 ); \ - (b)[(i) + 1] = (guint8) ( (n) >> 16 ); \ - (b)[(i) + 2] = (guint8) ( (n) >> 8 ); \ - (b)[(i) + 3] = (guint8) ( (n) ); \ - } - -/* Initialize the hash state */ -void sha256_starts( sha256_context *ctx ) -{ - ctx->total = 0; - ctx->state[0] = 0x6A09E667UL; - ctx->state[1] = 0xBB67AE85UL; - ctx->state[2] = 0x3C6EF372UL; - ctx->state[3] = 0xA54FF53AUL; - ctx->state[4] = 0x510E527FUL; - ctx->state[5] = 0x9B05688CUL; - ctx->state[6] = 0x1F83D9ABUL; - ctx->state[7] = 0x5BE0CD19UL; -} - -static void sha256_process( sha256_context *ctx, const guint8 *data ) -{ - guint32 i, temp1, temp2, W[64], A, B, C, D, E, F, G, H; - - /* init W */ - GET_UINT32( W[0], data, 0 ); - GET_UINT32( W[1], data, 4 ); - GET_UINT32( W[2], data, 8 ); - GET_UINT32( W[3], data, 12 ); - GET_UINT32( W[4], data, 16 ); - GET_UINT32( W[5], data, 20 ); - GET_UINT32( W[6], data, 24 ); - GET_UINT32( W[7], data, 28 ); - GET_UINT32( W[8], data, 32 ); - GET_UINT32( W[9], data, 36 ); - GET_UINT32( W[10], data, 40 ); - GET_UINT32( W[11], data, 44 ); - GET_UINT32( W[12], data, 48 ); - GET_UINT32( W[13], data, 52 ); - GET_UINT32( W[14], data, 56 ); - GET_UINT32( W[15], data, 60 ); - -#define RR(x,n) ((x << (32 - n)) | ((x & 0xFFFFFFFF) >> n)) -#define S0(x) (RR(x, 7) ^ RR(x, 18) ^ (x >> 3)) -#define S1(x) (RR(x, 17) ^ RR(x, 19) ^ (x >> 10)) - - for (i = 16; i < 64 ; i++) - { - W[i] = W[i - 16] + S0(W[i - 15]) + W[i - 7] + S1(W[i - 2]); - } - - /* Compression */ - A = ctx->state[0]; - B = ctx->state[1]; - C = ctx->state[2]; - D = ctx->state[3]; - E = ctx->state[4]; - F = ctx->state[5]; - G = ctx->state[6]; - H = ctx->state[7]; - -#undef S0 -#undef S1 -#define S0(x) (RR(x, 2) ^ RR(x, 13) ^ RR(x, 22)) -#define S1(x) (RR(x, 6) ^ RR(x, 11) ^ RR(x, 25)) -#define CH(x,y,z) (z ^ (x & (y ^ z))) -#define MAJ(x,y,z) (((x | y) & z) | (x & y)) - - for (i = 0; i < 64; ++i) { - temp1 = H + S1(E) + CH(E, F, G) + K[i] + W[i]; - temp2 = S0(A) + MAJ(A, B, C); - H = G; - G = F; - F = E; - E = D + temp1; - D = C; - C = B; - B = A; - A = temp1 + temp2; - - } - - ctx->state[0] += A; - ctx->state[1] += B; - ctx->state[2] += C; - ctx->state[3] += D; - ctx->state[4] += E; - ctx->state[5] += F; - ctx->state[6] += G; - ctx->state[7] += H; -} - -void sha256_update( sha256_context *ctx, const guint8 *input, guint32 length ) -{ - guint32 left, fill; - - if( ! length ) return; - - left = (guint32)(ctx->total % SHA256_BLOCK_SIZE); - fill = SHA256_BLOCK_SIZE - left; - - ctx->total += length; - - if( left && length >= fill ) - { - memcpy( (void *) (ctx->buffer + left), - (const void *) input, fill ); - sha256_process( ctx, ctx->buffer ); - length -= fill; - input += fill; - left = 0; - } - - while( length >= SHA256_BLOCK_SIZE ) - { - sha256_process( ctx, input ); - length -= SHA256_BLOCK_SIZE; - input += SHA256_BLOCK_SIZE; - } - - if( length ) - { - memcpy( (void *) (ctx->buffer + left), - (const void *) input, length ); - } -} - -static guint8 sha256_padding[64] = -{ - 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 -}; - -void sha256_finish( sha256_context *ctx, guint8 digest[SHA256_DIGEST_LEN] ) -{ - guint32 last, padn; - guint64 total_length; - guint8 msglen[8]; - - total_length = ctx->total * 8; - - last = (guint32)(ctx->total % SHA256_BLOCK_SIZE); - padn = ( last < 56 ) ? ( 56 - last ) : ( 120 - last ); - - PUT_UINT32( total_length >> 32, msglen, 0 ); - PUT_UINT32( total_length, msglen, 4 ); - - sha256_update( ctx, sha256_padding, padn ); - sha256_update( ctx, msglen, 8 ); - - PUT_UINT32( ctx->state[0], digest, 0 ); - PUT_UINT32( ctx->state[1], digest, 4 ); - PUT_UINT32( ctx->state[2], digest, 8 ); - PUT_UINT32( ctx->state[3], digest, 12 ); - PUT_UINT32( ctx->state[4], digest, 16 ); - PUT_UINT32( ctx->state[5], digest, 20 ); - PUT_UINT32( ctx->state[6], digest, 24 ); - PUT_UINT32( ctx->state[7], digest, 28 ); -} - -void sha256_hmac_starts( sha256_hmac_context *hctx, const guint8 *key, guint32 keylen ) -{ - guint32 i; - guint8 k_ipad[SHA256_BLOCK_SIZE]; - guint8 key_compress[SHA256_DIGEST_LEN]; - - memset( k_ipad, 0x36, SHA256_BLOCK_SIZE ); - memset( hctx->k_opad, 0x5C, SHA256_BLOCK_SIZE ); - - if (keylen > SHA256_BLOCK_SIZE) - { - sha256_starts( &hctx->ctx ); - sha256_update( &hctx->ctx, key, keylen ); - sha256_finish( &hctx->ctx, key_compress ); - key = key_compress; - keylen = SHA256_DIGEST_LEN; - } - - for( i = 0; i < keylen; i++ ) - { - k_ipad[i] ^= key[i]; - hctx->k_opad[i] ^= key[i]; - } - - sha256_starts( &hctx->ctx ); - sha256_update( &hctx->ctx, k_ipad, SHA256_BLOCK_SIZE ); -} - -void sha256_hmac_update( sha256_hmac_context *hctx, const guint8 *buf, guint32 buflen ) -{ - sha256_update( &hctx->ctx, buf, buflen ); -} - -void sha256_hmac_finish( sha256_hmac_context *hctx, guint8 digest[SHA256_DIGEST_LEN] ) -{ - guint8 tmpbuf[SHA256_DIGEST_LEN]; - - sha256_finish( &hctx->ctx, tmpbuf ); - - sha256_starts( &hctx->ctx ); - sha256_update( &hctx->ctx, hctx->k_opad, SHA256_BLOCK_SIZE ); - sha256_update( &hctx->ctx, tmpbuf, SHA256_DIGEST_LEN ); - sha256_finish( &hctx->ctx, digest ); -} - -void sha256_hmac( const guint8 *key, guint32 keylen, const guint8 *buf, guint32 buflen, - guint8 digest[SHA256_DIGEST_LEN] ) -{ - sha256_hmac_context hctx; - - sha256_hmac_starts( &hctx, key, keylen ); - sha256_hmac_update( &hctx, buf, buflen ); - sha256_hmac_finish( &hctx, digest ); -} - - -/* - * Editor modelines - http://www.wireshark.org/tools/modelines.html - * - * Local variables: - * c-basic-offset: 4 - * tab-width: 8 - * indent-tabs-mode: nil - * End: - * - * vi: set shiftwidth=4 tabstop=8 expandtab: - * :indentSize=4:tabSize=8:noTabs=true: - */ |