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, 672 insertions, 0 deletions
diff --git a/src/libstrongswan/crypto/hashers/sha2_hasher.c b/src/libstrongswan/crypto/hashers/sha2_hasher.c new file mode 100644 index 000000000..b68972cec --- /dev/null +++ b/src/libstrongswan/crypto/hashers/sha2_hasher.c @@ -0,0 +1,672 @@ +/** + * @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; +} |