--- /dev/null
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis
+ *
+ * LibTomCrypt is a library that provides various cryptographic
+ * algorithms in a highly modular and flexible manner.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ *
+ * Tom St Denis, tomstdenis@gmail.com, http://libtomcrypt.com
+ */
+#include "tomcrypt.h"
+
+/**
+ @file sha1.c
+ SHA1 code by Tom St Denis
+*/
+
+
+#ifdef SHA1
+
+const struct ltc_hash_descriptor sha1_desc =
+{
+ "sha1",
+ 2,
+ 20,
+ 64,
+
+ /* OID */
+ { 1, 3, 14, 3, 2, 26, },
+ 6,
+
+ &sha1_init,
+ &sha1_process,
+ &sha1_done,
+ &sha1_test,
+ NULL
+};
+
+#define F0(x,y,z) (z ^ (x & (y ^ z)))
+#define F1(x,y,z) (x ^ y ^ z)
+#define F2(x,y,z) ((x & y) | (z & (x | y)))
+#define F3(x,y,z) (x ^ y ^ z)
+
+#ifdef LTC_CLEAN_STACK
+static int _sha1_compress(hash_state *md, unsigned char *buf)
+#else
+static int sha1_compress(hash_state *md, unsigned char *buf)
+#endif
+{
+ ulong32 a,b,c,d,e,W[80],i;
+#ifdef LTC_SMALL_CODE
+ ulong32 t;
+#endif
+
+ /* copy the state into 512-bits into W[0..15] */
+ for (i = 0; i < 16; i++) {
+ LOAD32H(W[i], buf + (4*i));
+ }
+
+ /* copy state */
+ a = md->sha1.state[0];
+ b = md->sha1.state[1];
+ c = md->sha1.state[2];
+ d = md->sha1.state[3];
+ e = md->sha1.state[4];
+
+ /* expand it */
+ for (i = 16; i < 80; i++) {
+ W[i] = ROL(W[i-3] ^ W[i-8] ^ W[i-14] ^ W[i-16], 1);
+ }
+
+ /* compress */
+ /* round one */
+ #define FF0(a,b,c,d,e,i) e = (ROLc(a, 5) + F0(b,c,d) + e + W[i] + 0x5a827999UL); b = ROLc(b, 30);
+ #define FF1(a,b,c,d,e,i) e = (ROLc(a, 5) + F1(b,c,d) + e + W[i] + 0x6ed9eba1UL); b = ROLc(b, 30);
+ #define FF2(a,b,c,d,e,i) e = (ROLc(a, 5) + F2(b,c,d) + e + W[i] + 0x8f1bbcdcUL); b = ROLc(b, 30);
+ #define FF3(a,b,c,d,e,i) e = (ROLc(a, 5) + F3(b,c,d) + e + W[i] + 0xca62c1d6UL); b = ROLc(b, 30);
+
+#ifdef LTC_SMALL_CODE
+
+ for (i = 0; i < 20; ) {
+ FF0(a,b,c,d,e,i++); t = e; e = d; d = c; c = b; b = a; a = t;
+ }
+
+ for (; i < 40; ) {
+ FF1(a,b,c,d,e,i++); t = e; e = d; d = c; c = b; b = a; a = t;
+ }
+
+ for (; i < 60; ) {
+ FF2(a,b,c,d,e,i++); t = e; e = d; d = c; c = b; b = a; a = t;
+ }
+
+ for (; i < 80; ) {
+ FF3(a,b,c,d,e,i++); t = e; e = d; d = c; c = b; b = a; a = t;
+ }
+
+#else
+
+ for (i = 0; i < 20; ) {
+ FF0(a,b,c,d,e,i++);
+ FF0(e,a,b,c,d,i++);
+ FF0(d,e,a,b,c,i++);
+ FF0(c,d,e,a,b,i++);
+ FF0(b,c,d,e,a,i++);
+ }
+
+ /* round two */
+ for (; i < 40; ) {
+ FF1(a,b,c,d,e,i++);
+ FF1(e,a,b,c,d,i++);
+ FF1(d,e,a,b,c,i++);
+ FF1(c,d,e,a,b,i++);
+ FF1(b,c,d,e,a,i++);
+ }
+
+ /* round three */
+ for (; i < 60; ) {
+ FF2(a,b,c,d,e,i++);
+ FF2(e,a,b,c,d,i++);
+ FF2(d,e,a,b,c,i++);
+ FF2(c,d,e,a,b,i++);
+ FF2(b,c,d,e,a,i++);
+ }
+
+ /* round four */
+ for (; i < 80; ) {
+ FF3(a,b,c,d,e,i++);
+ FF3(e,a,b,c,d,i++);
+ FF3(d,e,a,b,c,i++);
+ FF3(c,d,e,a,b,i++);
+ FF3(b,c,d,e,a,i++);
+ }
+#endif
+
+ #undef FF0
+ #undef FF1
+ #undef FF2
+ #undef FF3
+
+ /* store */
+ md->sha1.state[0] = md->sha1.state[0] + a;
+ md->sha1.state[1] = md->sha1.state[1] + b;
+ md->sha1.state[2] = md->sha1.state[2] + c;
+ md->sha1.state[3] = md->sha1.state[3] + d;
+ md->sha1.state[4] = md->sha1.state[4] + e;
+
+ return CRYPT_OK;
+}
+
+#ifdef LTC_CLEAN_STACK
+static int sha1_compress(hash_state *md, unsigned char *buf)
+{
+ int err;
+ err = _sha1_compress(md, buf);
+ burn_stack(sizeof(ulong32) * 87);
+ return err;
+}
+#endif
+
+/**
+ Initialize the hash state
+ @param md The hash state you wish to initialize
+ @return CRYPT_OK if successful
+*/
+int sha1_init(hash_state * md)
+{
+ LTC_ARGCHK(md != NULL);
+ md->sha1.state[0] = 0x67452301UL;
+ md->sha1.state[1] = 0xefcdab89UL;
+ md->sha1.state[2] = 0x98badcfeUL;
+ md->sha1.state[3] = 0x10325476UL;
+ md->sha1.state[4] = 0xc3d2e1f0UL;
+ md->sha1.curlen = 0;
+ md->sha1.length = 0;
+ return CRYPT_OK;
+}
+
+/**
+ Process a block of memory though the hash
+ @param md The hash state
+ @param in The data to hash
+ @param inlen The length of the data (octets)
+ @return CRYPT_OK if successful
+*/
+HASH_PROCESS(sha1_process, sha1_compress, sha1, 64)
+
+/**
+ Terminate the hash to get the digest
+ @param md The hash state
+ @param out [out] The destination of the hash (20 bytes)
+ @return CRYPT_OK if successful
+*/
+int sha1_done(hash_state * md, unsigned char *out)
+{
+ int i;
+
+ LTC_ARGCHK(md != NULL);
+ LTC_ARGCHK(out != NULL);
+
+ if (md->sha1.curlen >= sizeof(md->sha1.buf)) {
+ return CRYPT_INVALID_ARG;
+ }
+
+ /* increase the length of the message */
+ md->sha1.length += md->sha1.curlen * 8;
+
+ /* append the '1' bit */
+ md->sha1.buf[md->sha1.curlen++] = (unsigned char)0x80;
+
+ /* if the length is currently above 56 bytes we append zeros
+ * then compress. Then we can fall back to padding zeros and length
+ * encoding like normal.
+ */
+ if (md->sha1.curlen > 56) {
+ while (md->sha1.curlen < 64) {
+ md->sha1.buf[md->sha1.curlen++] = (unsigned char)0;
+ }
+ sha1_compress(md, md->sha1.buf);
+ md->sha1.curlen = 0;
+ }
+
+ /* pad upto 56 bytes of zeroes */
+ while (md->sha1.curlen < 56) {
+ md->sha1.buf[md->sha1.curlen++] = (unsigned char)0;
+ }
+
+ /* store length */
+ STORE64H(md->sha1.length, md->sha1.buf+56);
+ sha1_compress(md, md->sha1.buf);
+
+ /* copy output */
+ for (i = 0; i < 5; i++) {
+ STORE32H(md->sha1.state[i], out+(4*i));
+ }
+#ifdef LTC_CLEAN_STACK
+ zeromem(md, sizeof(hash_state));
+#endif
+ return CRYPT_OK;
+}
+
+/**
+ Self-test the hash
+ @return CRYPT_OK if successful, CRYPT_NOP if self-tests have been disabled
+*/
+int sha1_test(void)
+{
+ #ifndef LTC_TEST
+ return CRYPT_NOP;
+ #else
+ static const struct {
+ char *msg;
+ unsigned char hash[20];
+ } tests[] = {
+ { "abc",
+ { 0xa9, 0x99, 0x3e, 0x36, 0x47, 0x06, 0x81, 0x6a,
+ 0xba, 0x3e, 0x25, 0x71, 0x78, 0x50, 0xc2, 0x6c,
+ 0x9c, 0xd0, 0xd8, 0x9d }
+ },
+ { "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
+ { 0x84, 0x98, 0x3E, 0x44, 0x1C, 0x3B, 0xD2, 0x6E,
+ 0xBA, 0xAE, 0x4A, 0xA1, 0xF9, 0x51, 0x29, 0xE5,
+ 0xE5, 0x46, 0x70, 0xF1 }
+ }
+ };
+
+ int i;
+ unsigned char tmp[20];
+ hash_state md;
+
+ for (i = 0; i < (int)(sizeof(tests) / sizeof(tests[0])); i++) {
+ sha1_init(&md);
+ sha1_process(&md, (unsigned char*)tests[i].msg, (unsigned long)strlen(tests[i].msg));
+ sha1_done(&md, tmp);
+ if (XMEMCMP(tmp, tests[i].hash, 20) != 0) {
+ return CRYPT_FAIL_TESTVECTOR;
+ }
+ }
+ return CRYPT_OK;
+ #endif
+}
+
+#endif
+
+
+
+/* $Source: /cvs/libtom/libtomcrypt/src/hashes/sha1.c,v $ */
+/* $Revision: 1.8 $ */
+/* $Date: 2006/11/01 09:28:17 $ */
projects / fms.git / blobdiff