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-rw-r--r--mozilla-sha1/sha1.c152
1 files changed, 152 insertions, 0 deletions
diff --git a/mozilla-sha1/sha1.c b/mozilla-sha1/sha1.c
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+/*
+ * The contents of this file are subject to the Mozilla Public
+ * License Version 1.1 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS
+ * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+ * implied. See the License for the specific language governing
+ * rights and limitations under the License.
+ *
+ * The Original Code is SHA 180-1 Reference Implementation (Compact version)
+ *
+ * The Initial Developer of the Original Code is Paul Kocher of
+ * Cryptography Research. Portions created by Paul Kocher are
+ * Copyright (C) 1995-9 by Cryptography Research, Inc. All
+ * Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * Paul Kocher
+ *
+ * Alternatively, the contents of this file may be used under the
+ * terms of the GNU General Public License Version 2 or later (the
+ * "GPL"), in which case the provisions of the GPL are applicable
+ * instead of those above. If you wish to allow use of your
+ * version of this file only under the terms of the GPL and not to
+ * allow others to use your version of this file under the MPL,
+ * indicate your decision by deleting the provisions above and
+ * replace them with the notice and other provisions required by
+ * the GPL. If you do not delete the provisions above, a recipient
+ * may use your version of this file under either the MPL or the
+ * GPL.
+ */
+
+#include "sha1.h"
+
+static void shaHashBlock(SHA_CTX *ctx);
+
+void SHA1_Init(SHA_CTX *ctx) {
+ int i;
+
+ ctx->lenW = 0;
+ ctx->sizeHi = ctx->sizeLo = 0;
+
+ /* Initialize H with the magic constants (see FIPS180 for constants)
+ */
+ ctx->H[0] = 0x67452301;
+ ctx->H[1] = 0xefcdab89;
+ ctx->H[2] = 0x98badcfe;
+ ctx->H[3] = 0x10325476;
+ ctx->H[4] = 0xc3d2e1f0;
+
+ for (i = 0; i < 80; i++)
+ ctx->W[i] = 0;
+}
+
+
+void SHA1_Update(SHA_CTX *ctx, void *_dataIn, int len) {
+ unsigned char *dataIn = _dataIn;
+ int i;
+
+ /* Read the data into W and process blocks as they get full
+ */
+ for (i = 0; i < len; i++) {
+ ctx->W[ctx->lenW / 4] <<= 8;
+ ctx->W[ctx->lenW / 4] |= (unsigned int)dataIn[i];
+ if ((++ctx->lenW) % 64 == 0) {
+ shaHashBlock(ctx);
+ ctx->lenW = 0;
+ }
+ ctx->sizeLo += 8;
+ ctx->sizeHi += (ctx->sizeLo < 8);
+ }
+}
+
+
+void SHA1_Final(unsigned char hashout[20], SHA_CTX *ctx) {
+ unsigned char pad0x80 = 0x80;
+ unsigned char pad0x00 = 0x00;
+ unsigned char padlen[8];
+ int i;
+
+ /* Pad with a binary 1 (e.g. 0x80), then zeroes, then length
+ */
+ padlen[0] = (unsigned char)((ctx->sizeHi >> 24) & 255);
+ padlen[1] = (unsigned char)((ctx->sizeHi >> 16) & 255);
+ padlen[2] = (unsigned char)((ctx->sizeHi >> 8) & 255);
+ padlen[3] = (unsigned char)((ctx->sizeHi >> 0) & 255);
+ padlen[4] = (unsigned char)((ctx->sizeLo >> 24) & 255);
+ padlen[5] = (unsigned char)((ctx->sizeLo >> 16) & 255);
+ padlen[6] = (unsigned char)((ctx->sizeLo >> 8) & 255);
+ padlen[7] = (unsigned char)((ctx->sizeLo >> 0) & 255);
+ SHA1_Update(ctx, &pad0x80, 1);
+ while (ctx->lenW != 56)
+ SHA1_Update(ctx, &pad0x00, 1);
+ SHA1_Update(ctx, padlen, 8);
+
+ /* Output hash
+ */
+ for (i = 0; i < 20; i++) {
+ hashout[i] = (unsigned char)(ctx->H[i / 4] >> 24);
+ ctx->H[i / 4] <<= 8;
+ }
+
+ /*
+ * Re-initialize the context (also zeroizes contents)
+ */
+ SHA1_Init(ctx);
+}
+
+
+#define SHA_ROT(X,n) (((X) << (n)) | ((X) >> (32-(n))))
+
+static void shaHashBlock(SHA_CTX *ctx) {
+ int t;
+ unsigned int A,B,C,D,E,TEMP;
+
+ for (t = 16; t <= 79; t++)
+ ctx->W[t] =
+ SHA_ROT(ctx->W[t-3] ^ ctx->W[t-8] ^ ctx->W[t-14] ^ ctx->W[t-16], 1);
+
+ A = ctx->H[0];
+ B = ctx->H[1];
+ C = ctx->H[2];
+ D = ctx->H[3];
+ E = ctx->H[4];
+
+ for (t = 0; t <= 19; t++) {
+ TEMP = SHA_ROT(A,5) + (((C^D)&B)^D) + E + ctx->W[t] + 0x5a827999;
+ E = D; D = C; C = SHA_ROT(B, 30); B = A; A = TEMP;
+ }
+ for (t = 20; t <= 39; t++) {
+ TEMP = SHA_ROT(A,5) + (B^C^D) + E + ctx->W[t] + 0x6ed9eba1;
+ E = D; D = C; C = SHA_ROT(B, 30); B = A; A = TEMP;
+ }
+ for (t = 40; t <= 59; t++) {
+ TEMP = SHA_ROT(A,5) + ((B&C)|(D&(B|C))) + E + ctx->W[t] + 0x8f1bbcdc;
+ E = D; D = C; C = SHA_ROT(B, 30); B = A; A = TEMP;
+ }
+ for (t = 60; t <= 79; t++) {
+ TEMP = SHA_ROT(A,5) + (B^C^D) + E + ctx->W[t] + 0xca62c1d6;
+ E = D; D = C; C = SHA_ROT(B, 30); B = A; A = TEMP;
+ }
+
+ ctx->H[0] += A;
+ ctx->H[1] += B;
+ ctx->H[2] += C;
+ ctx->H[3] += D;
+ ctx->H[4] += E;
+}
+