* Purple is the legal property of its developers, whose names are too numerous * to list here. Please refer to the COPYRIGHT file distributed with this * 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 02111-1301 USA #if !GLIB_CHECK_VERSION(2,16,0) #define SHA256_HMAC_BLOCK_SIZE 64 #define SHA256_ROTR(X,n) ((((X) >> (n)) | ((X) << (32-(n)))) & 0xFFFFFFFF) static const guint32 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 sha256_get_block_size(PurpleCipherContext *context) /* This does not change (in this case) */ return SHA256_HMAC_BLOCK_SIZE; sha256_hash_block(struct SHA256Context *sha256_ctx) { guint32 A, B, C, D, E, F, G, H, T1, T2; for(i = 16; i < 64; i++) { (SHA256_ROTR(sha256_ctx->W[i-2], 17) ^ SHA256_ROTR(sha256_ctx->W[i-2], 19) ^ (sha256_ctx->W[i-2] >> 10)) + (SHA256_ROTR(sha256_ctx->W[i-15], 7) ^ SHA256_ROTR(sha256_ctx->W[i-15], 18) ^ (sha256_ctx->W[i-15] >> 3)) for(i = 0; i < 64; i++) { + (SHA256_ROTR(E, 6) ^ SHA256_ROTR(E, 11) ^ SHA256_ROTR(E, 25)) + sha256_K[i] + sha256_ctx->W[i]; T2 = (SHA256_ROTR(A, 2) ^ SHA256_ROTR(A, 13) ^ SHA256_ROTR(A, 22)) + ((A & B) ^ (A & C) ^ (B & C)); sha256_set_opt(PurpleCipherContext *context, const gchar *name, void *value) { struct SHA256Context *ctx; ctx = purple_cipher_context_get_data(context); if(!strcmp(name, "sizeHi")) { ctx->sizeHi = GPOINTER_TO_INT(value); } else if(!strcmp(name, "sizeLo")) { ctx->sizeLo = GPOINTER_TO_INT(value); } else if(!strcmp(name, "lenW")) { ctx->lenW = GPOINTER_TO_INT(value); sha256_get_opt(PurpleCipherContext *context, const gchar *name) { struct SHA256Context *ctx; ctx = purple_cipher_context_get_data(context); if(!strcmp(name, "sizeHi")) { return GINT_TO_POINTER(ctx->sizeHi); } else if(!strcmp(name, "sizeLo")) { return GINT_TO_POINTER(ctx->sizeLo); } else if(!strcmp(name, "lenW")) { return GINT_TO_POINTER(ctx->lenW); sha256_init(PurpleCipherContext *context, void *extra) { struct SHA256Context *sha256_ctx; sha256_ctx = g_new0(struct SHA256Context, 1); purple_cipher_context_set_data(context, sha256_ctx); purple_cipher_context_reset(context, extra); sha256_reset(PurpleCipherContext *context, void *extra) { struct SHA256Context *sha256_ctx; sha256_ctx = purple_cipher_context_get_data(context); g_return_if_fail(sha256_ctx); sha256_ctx->H[0] = 0x6a09e667; sha256_ctx->H[1] = 0xbb67ae85; sha256_ctx->H[2] = 0x3c6ef372; sha256_ctx->H[3] = 0xa54ff53a; sha256_ctx->H[4] = 0x510e527f; sha256_ctx->H[5] = 0x9b05688c; sha256_ctx->H[6] = 0x1f83d9ab; sha256_ctx->H[7] = 0x5be0cd19; sha256_uninit(PurpleCipherContext *context) { struct SHA256Context *sha256_ctx; purple_cipher_context_reset(context, NULL); sha256_ctx = purple_cipher_context_get_data(context); memset(sha256_ctx, 0, sizeof(struct SHA256Context)); sha256_append(PurpleCipherContext *context, const guchar *data, size_t len) { struct SHA256Context *sha256_ctx; sha256_ctx = purple_cipher_context_get_data(context); g_return_if_fail(sha256_ctx); for(i = 0; i < len; i++) { sha256_ctx->W[sha256_ctx->lenW / 4] <<= 8; sha256_ctx->W[sha256_ctx->lenW / 4] |= data[i]; if((++sha256_ctx->lenW) % 64 == 0) { sha256_hash_block(sha256_ctx); sha256_ctx->sizeHi += (sha256_ctx->sizeLo < 8); sha256_digest(PurpleCipherContext *context, size_t in_len, guchar digest[32], struct SHA256Context *sha256_ctx; guchar pad0x80 = 0x80, pad0x00 = 0x00; g_return_val_if_fail(in_len >= 32, FALSE); sha256_ctx = purple_cipher_context_get_data(context); g_return_val_if_fail(sha256_ctx, FALSE); padlen[0] = (guchar)((sha256_ctx->sizeHi >> 24) & 255); padlen[1] = (guchar)((sha256_ctx->sizeHi >> 16) & 255); padlen[2] = (guchar)((sha256_ctx->sizeHi >> 8) & 255); padlen[3] = (guchar)((sha256_ctx->sizeHi >> 0) & 255); padlen[4] = (guchar)((sha256_ctx->sizeLo >> 24) & 255); padlen[5] = (guchar)((sha256_ctx->sizeLo >> 16) & 255); padlen[6] = (guchar)((sha256_ctx->sizeLo >> 8) & 255); padlen[7] = (guchar)((sha256_ctx->sizeLo >> 0) & 255); /* pad with a 1, then zeroes, then length */ purple_cipher_context_append(context, &pad0x80, 1); while(sha256_ctx->lenW != 56) purple_cipher_context_append(context, &pad0x00, 1); purple_cipher_context_append(context, padlen, 8); for(i = 0; i < 32; i++) { digest[i] = (guchar)(sha256_ctx->H[i / 4] >> 24); sha256_ctx->H[i / 4] <<= 8; purple_cipher_context_reset(context, NULL); static PurpleCipherOps SHA256Ops = { sha256_set_opt, /* Set Option */ sha256_get_opt, /* Get Option */ sha256_reset, /* reset */ sha256_uninit, /* uninit */ sha256_append, /* append */ sha256_digest, /* digest */ NULL, /* get salt size */ NULL, /* set batch mode */ NULL, /* get batch mode */ sha256_get_block_size, /* get block size */ NULL /* set key with len */ purple_sha256_cipher_get_ops(void) { #endif /* !GLIB_CHECK_VERSION(2,16,0) */