diff options
Diffstat (limited to 'src/libstrongswan/crypto/hashers/sha2_hasher.c')
-rw-r--r-- | src/libstrongswan/crypto/hashers/sha2_hasher.c | 672 |
1 files changed, 0 insertions, 672 deletions
diff --git a/src/libstrongswan/crypto/hashers/sha2_hasher.c b/src/libstrongswan/crypto/hashers/sha2_hasher.c deleted file mode 100644 index b68972cec..000000000 --- a/src/libstrongswan/crypto/hashers/sha2_hasher.c +++ /dev/null @@ -1,672 +0,0 @@ -/** - * @file sha2_hasher.c - * - * @brief Implementation of hasher_sha_t. - * - */ - -/* - * Copyright (C) 2006 Martin Willi - * Hochschule fuer Technik Rapperswil - * Copyright (C) 2001 Jari Ruusu. - * - * Ported from strongSwans implementation written by Jari Ruusu. - * - * 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. See <http://www.fsf.org/copyleft/gpl.txt>. - * - * 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. - */ - -#include <string.h> - -#include "sha2_hasher.h" - - -typedef struct private_sha512_hasher_t private_sha512_hasher_t; - -/** - * Private data structure with hasing context for SHA384 and SHA512 - */ -struct private_sha512_hasher_t { - /** - * Public interface for this hasher. - */ - sha2_hasher_t public; - - unsigned char sha_out[128]; /* results are here, bytes 0..47/0..63 */ - u_int64_t sha_H[8]; - u_int64_t sha_blocks; - u_int64_t sha_blocksMSB; - int sha_bufCnt; -}; - - -typedef struct private_sha256_hasher_t private_sha256_hasher_t; - -/** - * Private data structure with hasing context for SHA256 - */ -struct private_sha256_hasher_t { - /** - * Public interface for this hasher. - */ - sha2_hasher_t public; - - unsigned char sha_out[64]; /* results are here, bytes 0...31 */ - u_int32_t sha_H[8]; - u_int64_t sha_blocks; - int sha_bufCnt; -}; - - -static const u_int32_t sha256_hashInit[8] = { - 0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c, - 0x1f83d9ab, 0x5be0cd19 -}; - -static const u_int32_t sha256_K[64] = { - 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, - 0x923f82a4, 0xab1c5ed5, 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, - 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174, 0xe49b69c1, 0xefbe4786, - 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da, - 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, - 0x06ca6351, 0x14292967, 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, - 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85, 0xa2bfe8a1, 0xa81a664b, - 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070, - 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, - 0x5b9cca4f, 0x682e6ff3, 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, - 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2 -}; - -static const u_int64_t sha512_hashInit[8] = { - 0x6a09e667f3bcc908ULL, 0xbb67ae8584caa73bULL, 0x3c6ef372fe94f82bULL, - 0xa54ff53a5f1d36f1ULL, 0x510e527fade682d1ULL, 0x9b05688c2b3e6c1fULL, - 0x1f83d9abfb41bd6bULL, 0x5be0cd19137e2179ULL -}; - -static const u_int64_t sha384_hashInit[8] = { - 0xcbbb9d5dc1059ed8ULL, 0x629a292a367cd507ULL, 0x9159015a3070dd17ULL, - 0x152fecd8f70e5939ULL, 0x67332667ffc00b31ULL, 0x8eb44a8768581511ULL, - 0xdb0c2e0d64f98fa7ULL, 0x47b5481dbefa4fa4ULL -}; - -static const u_int64_t sha512_K[80] = { - 0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 0xb5c0fbcfec4d3b2fULL, - 0xe9b5dba58189dbbcULL, 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL, - 0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL, 0xd807aa98a3030242ULL, - 0x12835b0145706fbeULL, 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL, - 0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 0x9bdc06a725c71235ULL, - 0xc19bf174cf692694ULL, 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL, - 0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL, 0x2de92c6f592b0275ULL, - 0x4a7484aa6ea6e483ULL, 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL, - 0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 0xb00327c898fb213fULL, - 0xbf597fc7beef0ee4ULL, 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL, - 0x06ca6351e003826fULL, 0x142929670a0e6e70ULL, 0x27b70a8546d22ffcULL, - 0x2e1b21385c26c926ULL, 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL, - 0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 0x81c2c92e47edaee6ULL, - 0x92722c851482353bULL, 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL, - 0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL, 0xd192e819d6ef5218ULL, - 0xd69906245565a910ULL, 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL, - 0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 0x2748774cdf8eeb99ULL, - 0x34b0bcb5e19b48a8ULL, 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL, - 0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL, 0x748f82ee5defb2fcULL, - 0x78a5636f43172f60ULL, 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL, - 0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 0xbef9a3f7b2c67915ULL, - 0xc67178f2e372532bULL, 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL, - 0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL, 0x06f067aa72176fbaULL, - 0x0a637dc5a2c898a6ULL, 0x113f9804bef90daeULL, 0x1b710b35131c471bULL, - 0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 0x3c9ebe0a15c9bebcULL, - 0x431d67c49c100d4cULL, 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL, - 0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL -}; - - -/* set macros for SHA256 */ -#define Ch(x,y,z) (((x) & (y)) ^ ((~(x)) & (z))) -#define Maj(x,y,z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z))) -#define R(x,y) ((y) >> (x)) - -#define S(x,y) (((y) >> (x)) | ((y) << (32 - (x)))) -#define uSig0(x) ((S(2,(x))) ^ (S(13,(x))) ^ (S(22,(x)))) -#define uSig1(x) ((S(6,(x))) ^ (S(11,(x))) ^ (S(25,(x)))) -#define lSig0(x) ((S(7,(x))) ^ (S(18,(x))) ^ (R(3,(x)))) -#define lSig1(x) ((S(17,(x))) ^ (S(19,(x))) ^ (R(10,(x)))) - -/** - * Single block SHA256 transformation - */ -static void sha256_transform(private_sha256_hasher_t *ctx, - const unsigned char *datap) -{ - register int j; - u_int32_t a, b, c, d, e, f, g, h; - u_int32_t T1, T2, W[64], Wm2, Wm15; - - /* read the data, big endian byte order */ - j = 0; - do { - W[j] = (((u_int32_t)(datap[0]))<<24) | (((u_int32_t)(datap[1]))<<16) | - (((u_int32_t)(datap[2]))<<8 ) | ((u_int32_t)(datap[3])); - datap += 4; - } while(++j < 16); - - /* initialize variables a...h */ - a = ctx->sha_H[0]; - b = ctx->sha_H[1]; - c = ctx->sha_H[2]; - d = ctx->sha_H[3]; - e = ctx->sha_H[4]; - f = ctx->sha_H[5]; - g = ctx->sha_H[6]; - h = ctx->sha_H[7]; - - /* apply compression function */ - j = 0; - do - { - if(j >= 16) - { - Wm2 = W[j - 2]; - Wm15 = W[j - 15]; - W[j] = lSig1(Wm2) + W[j - 7] + lSig0(Wm15) + W[j - 16]; - } - T1 = h + uSig1(e) + Ch(e,f,g) + sha256_K[j] + W[j]; - T2 = uSig0(a) + Maj(a,b,c); - h = g; g = f; f = e; - e = d + T1; - d = c; c = b; b = a; - a = T1 + T2; - } while(++j < 64); - - /* compute intermediate hash value */ - ctx->sha_H[0] += a; - ctx->sha_H[1] += b; - ctx->sha_H[2] += c; - ctx->sha_H[3] += d; - ctx->sha_H[4] += e; - ctx->sha_H[5] += f; - ctx->sha_H[6] += g; - ctx->sha_H[7] += h; - - ctx->sha_blocks++; -} - -/** - * Update SHA256 hash - */ -static void sha256_write(private_sha256_hasher_t *ctx, - const unsigned char *datap, int length) -{ - while(length > 0) - { - if(!ctx->sha_bufCnt) - { - while(length >= sizeof(ctx->sha_out)) - { - sha256_transform(ctx, datap); - datap += sizeof(ctx->sha_out); - length -= sizeof(ctx->sha_out); - } - if(!length) return; - } - ctx->sha_out[ctx->sha_bufCnt] = *datap++; - length--; - if(++ctx->sha_bufCnt == sizeof(ctx->sha_out)) - { - sha256_transform(ctx, &ctx->sha_out[0]); - ctx->sha_bufCnt = 0; - } - } -} - -/** - * finalize SHA256 hash - */ -static void sha256_final(private_sha256_hasher_t *ctx) -{ - register int j; - u_int64_t bitLength; - u_int32_t i; - unsigned char padByte, *datap; - - bitLength = (ctx->sha_blocks << 9) | (ctx->sha_bufCnt << 3); - padByte = 0x80; - sha256_write(ctx, &padByte, 1); - - /* pad extra space with zeroes */ - padByte = 0; - while(ctx->sha_bufCnt != 56) - { - sha256_write(ctx, &padByte, 1); - } - - /* write bit length, big endian byte order */ - ctx->sha_out[56] = bitLength >> 56; - ctx->sha_out[57] = bitLength >> 48; - ctx->sha_out[58] = bitLength >> 40; - ctx->sha_out[59] = bitLength >> 32; - ctx->sha_out[60] = bitLength >> 24; - ctx->sha_out[61] = bitLength >> 16; - ctx->sha_out[62] = bitLength >> 8; - ctx->sha_out[63] = bitLength; - sha256_transform(ctx, &ctx->sha_out[0]); - - /* return results in ctx->sha_out[0...31] */ - datap = &ctx->sha_out[0]; - j = 0; - do { - i = ctx->sha_H[j]; - datap[0] = i >> 24; - datap[1] = i >> 16; - datap[2] = i >> 8; - datap[3] = i; - datap += 4; - } while(++j < 8); -} - -/* update macros for SHA512 */ -#undef S -#undef uSig0 -#undef uSig1 -#undef lSig0 -#undef lSig1 -#define S(x,y) (((y) >> (x)) | ((y) << (64 - (x)))) -#define uSig0(x) ((S(28,(x))) ^ (S(34,(x))) ^ (S(39,(x)))) -#define uSig1(x) ((S(14,(x))) ^ (S(18,(x))) ^ (S(41,(x)))) -#define lSig0(x) ((S(1,(x))) ^ (S(8,(x))) ^ (R(7,(x)))) -#define lSig1(x) ((S(19,(x))) ^ (S(61,(x))) ^ (R(6,(x)))) - -/** - * Single block SHA384/SHA512 transformation - */ -static void sha512_transform(private_sha512_hasher_t *ctx, - const unsigned char *datap) -{ - register int j; - u_int64_t a, b, c, d, e, f, g, h; - u_int64_t T1, T2, W[80], Wm2, Wm15; - - /* read the data, big endian byte order */ - j = 0; - do { - W[j] = (((u_int64_t)(datap[0]))<<56) | (((u_int64_t)(datap[1]))<<48) | - (((u_int64_t)(datap[2]))<<40) | (((u_int64_t)(datap[3]))<<32) | - (((u_int64_t)(datap[4]))<<24) | (((u_int64_t)(datap[5]))<<16) | - (((u_int64_t)(datap[6]))<<8 ) | ((u_int64_t)(datap[7])); - datap += 8; - } while(++j < 16); - - /* initialize variables a...h */ - a = ctx->sha_H[0]; - b = ctx->sha_H[1]; - c = ctx->sha_H[2]; - d = ctx->sha_H[3]; - e = ctx->sha_H[4]; - f = ctx->sha_H[5]; - g = ctx->sha_H[6]; - h = ctx->sha_H[7]; - - /* apply compression function */ - j = 0; - do { - if(j >= 16) { - Wm2 = W[j - 2]; - Wm15 = W[j - 15]; - W[j] = lSig1(Wm2) + W[j - 7] + lSig0(Wm15) + W[j - 16]; - } - T1 = h + uSig1(e) + Ch(e,f,g) + sha512_K[j] + W[j]; - T2 = uSig0(a) + Maj(a,b,c); - h = g; g = f; f = e; - e = d + T1; - d = c; c = b; b = a; - a = T1 + T2; - } while(++j < 80); - - /* compute intermediate hash value */ - ctx->sha_H[0] += a; - ctx->sha_H[1] += b; - ctx->sha_H[2] += c; - ctx->sha_H[3] += d; - ctx->sha_H[4] += e; - ctx->sha_H[5] += f; - ctx->sha_H[6] += g; - ctx->sha_H[7] += h; - - ctx->sha_blocks++; - if(!ctx->sha_blocks) ctx->sha_blocksMSB++; -} - -/** - * Update a SHA384/SHA512 hash - */ -static void sha512_write(private_sha512_hasher_t *ctx, - const unsigned char *datap, int length) -{ - while(length > 0) - { - if(!ctx->sha_bufCnt) - { - while(length >= sizeof(ctx->sha_out)) - { - sha512_transform(ctx, datap); - datap += sizeof(ctx->sha_out); - length -= sizeof(ctx->sha_out); - } - if(!length) return; - } - ctx->sha_out[ctx->sha_bufCnt] = *datap++; - length--; - if(++ctx->sha_bufCnt == sizeof(ctx->sha_out)) - { - sha512_transform(ctx, &ctx->sha_out[0]); - ctx->sha_bufCnt = 0; - } - } -} - -/** - * Finalize a SHA384/SHA512 hash - */ -static void sha512_final(private_sha512_hasher_t *ctx) -{ - register int j; - u_int64_t bitLength, bitLengthMSB; - u_int64_t i; - unsigned char padByte, *datap; - - bitLength = (ctx->sha_blocks << 10) | (ctx->sha_bufCnt << 3); - bitLengthMSB = (ctx->sha_blocksMSB << 10) | (ctx->sha_blocks >> 54); - padByte = 0x80; - sha512_write(ctx, &padByte, 1); - - /* pad extra space with zeroes */ - padByte = 0; - while(ctx->sha_bufCnt != 112) - { - sha512_write(ctx, &padByte, 1); - } - - /* write bit length, big endian byte order */ - ctx->sha_out[112] = bitLengthMSB >> 56; - ctx->sha_out[113] = bitLengthMSB >> 48; - ctx->sha_out[114] = bitLengthMSB >> 40; - ctx->sha_out[115] = bitLengthMSB >> 32; - ctx->sha_out[116] = bitLengthMSB >> 24; - ctx->sha_out[117] = bitLengthMSB >> 16; - ctx->sha_out[118] = bitLengthMSB >> 8; - ctx->sha_out[119] = bitLengthMSB; - ctx->sha_out[120] = bitLength >> 56; - ctx->sha_out[121] = bitLength >> 48; - ctx->sha_out[122] = bitLength >> 40; - ctx->sha_out[123] = bitLength >> 32; - ctx->sha_out[124] = bitLength >> 24; - ctx->sha_out[125] = bitLength >> 16; - ctx->sha_out[126] = bitLength >> 8; - ctx->sha_out[127] = bitLength; - sha512_transform(ctx, &ctx->sha_out[0]); - - /* return results in ctx->sha_out[0...63] */ - datap = &ctx->sha_out[0]; - j = 0; - do { - i = ctx->sha_H[j]; - datap[0] = i >> 56; - datap[1] = i >> 48; - datap[2] = i >> 40; - datap[3] = i >> 32; - datap[4] = i >> 24; - datap[5] = i >> 16; - datap[6] = i >> 8; - datap[7] = i; - datap += 8; - } while(++j < 8); -} - -/** - * Implementation of hasher_t.get_hash for SHA256. - */ -static void get_hash256(private_sha256_hasher_t *this, - chunk_t chunk, u_int8_t *buffer) -{ - sha256_write(this, chunk.ptr, chunk.len); - if (buffer != NULL) - { - sha256_final(this); - memcpy(buffer, this->sha_out, HASH_SIZE_SHA256); - this->public.hasher_interface.reset(&(this->public.hasher_interface)); - } -} - -/** - * Implementation of hasher_t.get_hash for SHA384. - */ -static void get_hash384(private_sha512_hasher_t *this, - chunk_t chunk, u_int8_t *buffer) -{ - sha512_write(this, chunk.ptr, chunk.len); - if (buffer != NULL) - { - sha512_final(this); - memcpy(buffer, this->sha_out, HASH_SIZE_SHA384); - this->public.hasher_interface.reset(&(this->public.hasher_interface)); - } -} - -/** - * Implementation of hasher_t.get_hash for SHA512. - */ -static void get_hash512(private_sha512_hasher_t *this, - chunk_t chunk, u_int8_t *buffer) -{ - sha512_write(this, chunk.ptr, chunk.len); - if (buffer != NULL) - { - sha512_final(this); - memcpy(buffer, this->sha_out, HASH_SIZE_SHA512); - this->public.hasher_interface.reset(&(this->public.hasher_interface)); - } -} - -/** - * Implementation of hasher_t.allocate_hash for SHA256. - */ -static void allocate_hash256(private_sha256_hasher_t *this, - chunk_t chunk, chunk_t *hash) -{ - chunk_t allocated_hash; - - sha256_write(this, chunk.ptr, chunk.len); - if (hash != NULL) - { - sha256_final(this); - allocated_hash = chunk_alloc(HASH_SIZE_SHA256); - memcpy(allocated_hash.ptr, this->sha_out, HASH_SIZE_SHA256); - this->public.hasher_interface.reset(&(this->public.hasher_interface)); - *hash = allocated_hash; - } -} - -/** - * Implementation of hasher_t.allocate_hash for SHA384. - */ -static void allocate_hash384(private_sha512_hasher_t *this, - chunk_t chunk, chunk_t *hash) -{ - chunk_t allocated_hash; - - sha512_write(this, chunk.ptr, chunk.len); - if (hash != NULL) - { - sha512_final(this); - allocated_hash = chunk_alloc(HASH_SIZE_SHA384); - memcpy(allocated_hash.ptr, this->sha_out, HASH_SIZE_SHA384); - this->public.hasher_interface.reset(&(this->public.hasher_interface)); - *hash = allocated_hash; - } -} - -/** - * Implementation of hasher_t.allocate_hash for SHA512. - */ -static void allocate_hash512(private_sha512_hasher_t *this, - chunk_t chunk, chunk_t *hash) -{ - chunk_t allocated_hash; - - sha512_write(this, chunk.ptr, chunk.len); - if (hash != NULL) - { - sha512_final(this); - allocated_hash = chunk_alloc(HASH_SIZE_SHA512); - memcpy(allocated_hash.ptr, this->sha_out, HASH_SIZE_SHA512); - this->public.hasher_interface.reset(&(this->public.hasher_interface)); - *hash = allocated_hash; - } -} - -/** - * Implementation of hasher_t.get_hash_size for SHA256. - */ -static size_t get_hash_size256(private_sha256_hasher_t *this) -{ - return HASH_SIZE_SHA256; -} - -/** - * Implementation of hasher_t.get_hash_size for SHA384. - */ -static size_t get_hash_size384(private_sha512_hasher_t *this) -{ - return HASH_SIZE_SHA384; -} - -/** - * Implementation of hasher_t.get_hash_size for SHA512. - */ -static size_t get_hash_size512(private_sha512_hasher_t *this) -{ - return HASH_SIZE_SHA512; -} - -/** - * Implementation of hasher_t.reset for SHA256 - */ -static void reset256(private_sha256_hasher_t *ctx) -{ - memcpy(&ctx->sha_H[0], &sha256_hashInit[0], sizeof(ctx->sha_H)); - ctx->sha_blocks = 0; - ctx->sha_bufCnt = 0; -} - -/** - * Implementation of hasher_t.reset for SHA384 - */ -static void reset384(private_sha512_hasher_t *ctx) -{ - memcpy(&ctx->sha_H[0], &sha384_hashInit[0], sizeof(ctx->sha_H)); - ctx->sha_blocks = 0; - ctx->sha_blocksMSB = 0; - ctx->sha_bufCnt = 0; -} - -/** - * Implementation of hasher_t.reset for SHA512 - */ -static void reset512(private_sha512_hasher_t *ctx) -{ - memcpy(&ctx->sha_H[0], &sha512_hashInit[0], sizeof(ctx->sha_H)); - ctx->sha_blocks = 0; - ctx->sha_blocksMSB = 0; - ctx->sha_bufCnt = 0; -} - -/** - * Implementation of hasher_t.get_state for SHA256 - */ -static chunk_t get_state256(private_sha256_hasher_t *ctx) -{ - chunk_t chunk; - chunk.ptr = (u_char*)&ctx->sha_H[0]; - chunk.len = HASH_SIZE_SHA256; - return chunk; -} - -/** - * Implementation of hasher_t.get_state for SHA384 - */ -static chunk_t get_state384(private_sha512_hasher_t *ctx) -{ - chunk_t chunk; - chunk.ptr = (u_char*)&ctx->sha_H[0]; - chunk.len = HASH_SIZE_SHA384; - return chunk; -} -/** - * Implementation of hasher_t.get_state for SHA512 - */ -static chunk_t get_state512(private_sha512_hasher_t *ctx) -{ - chunk_t chunk; - chunk.ptr = (u_char*)&ctx->sha_H[0]; - chunk.len = HASH_SIZE_SHA512; - return chunk; -} - -/** - * Implementation of hasher_t.destroy. - */ -static void destroy(sha2_hasher_t *this) -{ - free(this); -} - -/* - * Described in header. - */ -sha2_hasher_t *sha2_hasher_create(hash_algorithm_t algorithm) -{ - sha2_hasher_t *this; - - switch (algorithm) - { - case HASH_SHA256: - this = (sha2_hasher_t*)malloc_thing(private_sha256_hasher_t); - this->hasher_interface.reset = (void(*)(hasher_t*))reset256; - this->hasher_interface.get_state = (chunk_t(*)(hasher_t*))get_state256; - this->hasher_interface.get_hash_size = (size_t(*)(hasher_t*))get_hash_size256; - this->hasher_interface.get_hash = (void(*)(hasher_t*,chunk_t,u_int8_t*))get_hash256; - this->hasher_interface.allocate_hash = (void(*)(hasher_t*,chunk_t,chunk_t*))allocate_hash256; - break; - case HASH_SHA384: - /* uses SHA512 data structure */ - this = (sha2_hasher_t*)malloc_thing(private_sha512_hasher_t); - this->hasher_interface.reset = (void(*)(hasher_t*))reset384; - this->hasher_interface.get_state = (chunk_t(*)(hasher_t*))get_state384; - this->hasher_interface.get_hash_size = (size_t(*)(hasher_t*))get_hash_size384; - this->hasher_interface.get_hash = (void(*)(hasher_t*,chunk_t,u_int8_t*))get_hash384; - this->hasher_interface.allocate_hash = (void(*)(hasher_t*,chunk_t,chunk_t*))allocate_hash384; - break; - case HASH_SHA512: - this = (sha2_hasher_t*)malloc_thing(private_sha512_hasher_t); - this->hasher_interface.reset = (void(*)(hasher_t*))reset512; - this->hasher_interface.get_state = (chunk_t(*)(hasher_t*))get_state512; - this->hasher_interface.get_hash_size = (size_t(*)(hasher_t*))get_hash_size512; - this->hasher_interface.get_hash = (void(*)(hasher_t*,chunk_t,u_int8_t*))get_hash512; - this->hasher_interface.allocate_hash = (void(*)(hasher_t*,chunk_t,chunk_t*))allocate_hash512; - break; - default: - return NULL; - } - this->hasher_interface.destroy = (void(*)(hasher_t*))destroy; - - /* initialize */ - this->hasher_interface.reset(&this->hasher_interface); - - return this; -} |