--- a/libpurple/ciphers/sha256.c Sat Feb 02 18:29:35 2013 +0100
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,283 +0,0 @@
-/*
- * purple
- *
- * 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
- * source distribution.
- *
- * 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
- */
-#include <cipher.h>
-
-#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
-};
-
-struct SHA256Context {
- guint32 H[8];
- guint32 W[64];
-
- gint lenW;
-
- guint32 sizeHi;
- guint32 sizeLo;
-};
-
-static size_t
-sha256_get_block_size(PurpleCipherContext *context)
-{
- /* This does not change (in this case) */
- return SHA256_HMAC_BLOCK_SIZE;
-}
-
-static void
-sha256_hash_block(struct SHA256Context *sha256_ctx) {
- gint i;
- guint32 A, B, C, D, E, F, G, H, T1, T2;
-
- for(i = 16; i < 64; i++) {
- sha256_ctx->W[i] =
- (SHA256_ROTR(sha256_ctx->W[i-2], 17) ^ SHA256_ROTR(sha256_ctx->W[i-2], 19) ^ (sha256_ctx->W[i-2] >> 10))
- + sha256_ctx->W[i-7]
- + (SHA256_ROTR(sha256_ctx->W[i-15], 7) ^ SHA256_ROTR(sha256_ctx->W[i-15], 18) ^ (sha256_ctx->W[i-15] >> 3))
- + sha256_ctx->W[i-16];
- }
-
- A = sha256_ctx->H[0];
- B = sha256_ctx->H[1];
- C = sha256_ctx->H[2];
- D = sha256_ctx->H[3];
- E = sha256_ctx->H[4];
- F = sha256_ctx->H[5];
- G = sha256_ctx->H[6];
- H = sha256_ctx->H[7];
-
- for(i = 0; i < 64; i++) {
- T1 = H
- + (SHA256_ROTR(E, 6) ^ SHA256_ROTR(E, 11) ^ SHA256_ROTR(E, 25))
- + ((E & F) ^ ((~E) & G))
- + 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));
- H = G;
- G = F;
- F = E;
- E = D + T1;
- D = C;
- C = B;
- B = A;
- A = T1 + T2;
- }
-
- sha256_ctx->H[0] += A;
- sha256_ctx->H[1] += B;
- sha256_ctx->H[2] += C;
- sha256_ctx->H[3] += D;
- sha256_ctx->H[4] += E;
- sha256_ctx->H[5] += F;
- sha256_ctx->H[6] += G;
- sha256_ctx->H[7] += H;
-}
-
-static void
-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);
- }
-}
-
-static void *
-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);
- }
-
- return NULL;
-}
-
-static void
-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);
-}
-
-static void
-sha256_reset(PurpleCipherContext *context, void *extra) {
- struct SHA256Context *sha256_ctx;
- gint i;
-
- sha256_ctx = purple_cipher_context_get_data(context);
-
- g_return_if_fail(sha256_ctx);
-
- sha256_ctx->lenW = 0;
- sha256_ctx->sizeHi = 0;
- sha256_ctx->sizeLo = 0;
-
- 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;
-
- for(i = 0; i < 64; i++)
- sha256_ctx->W[i] = 0;
-}
-
-static void
-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));
-
- g_free(sha256_ctx);
- sha256_ctx = NULL;
-}
-
-static void
-sha256_append(PurpleCipherContext *context, const guchar *data, size_t len) {
- struct SHA256Context *sha256_ctx;
- gint i;
-
- 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->lenW = 0;
- }
-
- sha256_ctx->sizeLo += 8;
- sha256_ctx->sizeHi += (sha256_ctx->sizeLo < 8);
- }
-}
-
-static gboolean
-sha256_digest(PurpleCipherContext *context, size_t in_len, guchar digest[32],
- size_t *out_len)
-{
- struct SHA256Context *sha256_ctx;
- guchar pad0x80 = 0x80, pad0x00 = 0x00;
- guchar padlen[8];
- gint i;
-
- 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);
-
- if(out_len)
- *out_len = 32;
-
- return TRUE;
-}
-
-static PurpleCipherOps SHA256Ops = {
- sha256_set_opt, /* Set Option */
- sha256_get_opt, /* Get Option */
- sha256_init, /* init */
- sha256_reset, /* reset */
- sha256_uninit, /* uninit */
- NULL, /* set iv */
- sha256_append, /* append */
- sha256_digest, /* digest */
- NULL, /* encrypt */
- NULL, /* decrypt */
- NULL, /* set salt */
- NULL, /* get salt size */
- NULL, /* set key */
- NULL, /* get key size */
- NULL, /* set batch mode */
- NULL, /* get batch mode */
- sha256_get_block_size, /* get block size */
- NULL /* set key with len */
-};
-
-PurpleCipherOps *
-purple_sha256_cipher_get_ops(void) {
- return &SHA256Ops;
-}
-
-#endif /* !GLIB_CHECK_VERSION(2,16,0) */
-