--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rmd128.c	Mon May 31 18:21:40 2004 +0000
@@ -0,0 +1,368 @@
+/* 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, [email protected], http://libtomcrypt.org
+ */
+
+/* Implementation of RIPEMD-128 based on the source by Antoon Bosselaers, ESAT-COSIC
+ *
+ * This source has been radically overhauled to be portable and work within
+ * the LibTomCrypt API by Tom St Denis
+ */
+#include "mycrypt.h"
+
+#ifdef RIPEMD128
+
+const struct _hash_descriptor rmd128_desc =
+{
+    "rmd128",
+    8,
+    16,
+    64,
+    &rmd128_init,
+    &rmd128_process,
+    &rmd128_done,
+    &rmd128_test
+};
+
+/* the four basic functions F(), G() and H() */
+#define F(x, y, z)        ((x) ^ (y) ^ (z)) 
+#define G(x, y, z)        (((x) & (y)) | (~(x) & (z))) 
+#define H(x, y, z)        (((x) | ~(y)) ^ (z))
+#define I(x, y, z)        (((x) & (z)) | ((y) & ~(z))) 
+  
+/* the eight basic operations FF() through III() */
+#define FF(a, b, c, d, x, s)        \
+      (a) += F((b), (c), (d)) + (x);\
+      (a) = ROL((a), (s));
+
+#define GG(a, b, c, d, x, s)        \
+      (a) += G((b), (c), (d)) + (x) + 0x5a827999UL;\
+      (a) = ROL((a), (s));
+
+#define HH(a, b, c, d, x, s)        \
+      (a) += H((b), (c), (d)) + (x) + 0x6ed9eba1UL;\
+      (a) = ROL((a), (s));
+
+#define II(a, b, c, d, x, s)        \
+      (a) += I((b), (c), (d)) + (x) + 0x8f1bbcdcUL;\
+      (a) = ROL((a), (s));
+
+#define FFF(a, b, c, d, x, s)        \
+      (a) += F((b), (c), (d)) + (x);\
+      (a) = ROL((a), (s));
+
+#define GGG(a, b, c, d, x, s)        \
+      (a) += G((b), (c), (d)) + (x) + 0x6d703ef3UL;\
+      (a) = ROL((a), (s));
+
+#define HHH(a, b, c, d, x, s)        \
+      (a) += H((b), (c), (d)) + (x) + 0x5c4dd124UL;\
+      (a) = ROL((a), (s));
+
+#define III(a, b, c, d, x, s)        \
+      (a) += I((b), (c), (d)) + (x) + 0x50a28be6UL;\
+      (a) = ROL((a), (s));
+
+#ifdef CLEAN_STACK
+static void _rmd128_compress(hash_state *md, unsigned char *buf)
+#else
+static void rmd128_compress(hash_state *md, unsigned char *buf)
+#endif
+{
+   ulong32 aa,bb,cc,dd,aaa,bbb,ccc,ddd,X[16];
+   int i;
+   
+   /* load words X */
+   for (i = 0; i < 16; i++){
+      LOAD32L(X[i], buf + (4 * i));
+   }
+
+   /* load state */
+   aa = aaa = md->rmd128.state[0];
+   bb = bbb = md->rmd128.state[1];
+   cc = ccc = md->rmd128.state[2];
+   dd = ddd = md->rmd128.state[3];
+
+   /* round 1 */
+   FF(aa, bb, cc, dd, X[ 0], 11);
+   FF(dd, aa, bb, cc, X[ 1], 14);
+   FF(cc, dd, aa, bb, X[ 2], 15);
+   FF(bb, cc, dd, aa, X[ 3], 12);
+   FF(aa, bb, cc, dd, X[ 4],  5);
+   FF(dd, aa, bb, cc, X[ 5],  8);
+   FF(cc, dd, aa, bb, X[ 6],  7);
+   FF(bb, cc, dd, aa, X[ 7],  9);
+   FF(aa, bb, cc, dd, X[ 8], 11);
+   FF(dd, aa, bb, cc, X[ 9], 13);
+   FF(cc, dd, aa, bb, X[10], 14);
+   FF(bb, cc, dd, aa, X[11], 15);
+   FF(aa, bb, cc, dd, X[12],  6);
+   FF(dd, aa, bb, cc, X[13],  7);
+   FF(cc, dd, aa, bb, X[14],  9);
+   FF(bb, cc, dd, aa, X[15],  8);
+                             
+   /* round 2 */
+   GG(aa, bb, cc, dd, X[ 7],  7);
+   GG(dd, aa, bb, cc, X[ 4],  6);
+   GG(cc, dd, aa, bb, X[13],  8);
+   GG(bb, cc, dd, aa, X[ 1], 13);
+   GG(aa, bb, cc, dd, X[10], 11);
+   GG(dd, aa, bb, cc, X[ 6],  9);
+   GG(cc, dd, aa, bb, X[15],  7);
+   GG(bb, cc, dd, aa, X[ 3], 15);
+   GG(aa, bb, cc, dd, X[12],  7);
+   GG(dd, aa, bb, cc, X[ 0], 12);
+   GG(cc, dd, aa, bb, X[ 9], 15);
+   GG(bb, cc, dd, aa, X[ 5],  9);
+   GG(aa, bb, cc, dd, X[ 2], 11);
+   GG(dd, aa, bb, cc, X[14],  7);
+   GG(cc, dd, aa, bb, X[11], 13);
+   GG(bb, cc, dd, aa, X[ 8], 12);
+
+   /* round 3 */
+   HH(aa, bb, cc, dd, X[ 3], 11);
+   HH(dd, aa, bb, cc, X[10], 13);
+   HH(cc, dd, aa, bb, X[14],  6);
+   HH(bb, cc, dd, aa, X[ 4],  7);
+   HH(aa, bb, cc, dd, X[ 9], 14);
+   HH(dd, aa, bb, cc, X[15],  9);
+   HH(cc, dd, aa, bb, X[ 8], 13);
+   HH(bb, cc, dd, aa, X[ 1], 15);
+   HH(aa, bb, cc, dd, X[ 2], 14);
+   HH(dd, aa, bb, cc, X[ 7],  8);
+   HH(cc, dd, aa, bb, X[ 0], 13);
+   HH(bb, cc, dd, aa, X[ 6],  6);
+   HH(aa, bb, cc, dd, X[13],  5);
+   HH(dd, aa, bb, cc, X[11], 12);
+   HH(cc, dd, aa, bb, X[ 5],  7);
+   HH(bb, cc, dd, aa, X[12],  5);
+
+   /* round 4 */
+   II(aa, bb, cc, dd, X[ 1], 11);
+   II(dd, aa, bb, cc, X[ 9], 12);
+   II(cc, dd, aa, bb, X[11], 14);
+   II(bb, cc, dd, aa, X[10], 15);
+   II(aa, bb, cc, dd, X[ 0], 14);
+   II(dd, aa, bb, cc, X[ 8], 15);
+   II(cc, dd, aa, bb, X[12],  9);
+   II(bb, cc, dd, aa, X[ 4],  8);
+   II(aa, bb, cc, dd, X[13],  9);
+   II(dd, aa, bb, cc, X[ 3], 14);
+   II(cc, dd, aa, bb, X[ 7],  5);
+   II(bb, cc, dd, aa, X[15],  6);
+   II(aa, bb, cc, dd, X[14],  8);
+   II(dd, aa, bb, cc, X[ 5],  6);
+   II(cc, dd, aa, bb, X[ 6],  5);
+   II(bb, cc, dd, aa, X[ 2], 12);
+
+   /* parallel round 1 */
+   III(aaa, bbb, ccc, ddd, X[ 5],  8); 
+   III(ddd, aaa, bbb, ccc, X[14],  9);
+   III(ccc, ddd, aaa, bbb, X[ 7],  9);
+   III(bbb, ccc, ddd, aaa, X[ 0], 11);
+   III(aaa, bbb, ccc, ddd, X[ 9], 13);
+   III(ddd, aaa, bbb, ccc, X[ 2], 15);
+   III(ccc, ddd, aaa, bbb, X[11], 15);
+   III(bbb, ccc, ddd, aaa, X[ 4],  5);
+   III(aaa, bbb, ccc, ddd, X[13],  7);
+   III(ddd, aaa, bbb, ccc, X[ 6],  7);
+   III(ccc, ddd, aaa, bbb, X[15],  8);
+   III(bbb, ccc, ddd, aaa, X[ 8], 11);
+   III(aaa, bbb, ccc, ddd, X[ 1], 14);
+   III(ddd, aaa, bbb, ccc, X[10], 14);
+   III(ccc, ddd, aaa, bbb, X[ 3], 12);
+   III(bbb, ccc, ddd, aaa, X[12],  6);
+
+   /* parallel round 2 */
+   HHH(aaa, bbb, ccc, ddd, X[ 6],  9);
+   HHH(ddd, aaa, bbb, ccc, X[11], 13);
+   HHH(ccc, ddd, aaa, bbb, X[ 3], 15);
+   HHH(bbb, ccc, ddd, aaa, X[ 7],  7);
+   HHH(aaa, bbb, ccc, ddd, X[ 0], 12);
+   HHH(ddd, aaa, bbb, ccc, X[13],  8);
+   HHH(ccc, ddd, aaa, bbb, X[ 5],  9);
+   HHH(bbb, ccc, ddd, aaa, X[10], 11);
+   HHH(aaa, bbb, ccc, ddd, X[14],  7);
+   HHH(ddd, aaa, bbb, ccc, X[15],  7);
+   HHH(ccc, ddd, aaa, bbb, X[ 8], 12);
+   HHH(bbb, ccc, ddd, aaa, X[12],  7);
+   HHH(aaa, bbb, ccc, ddd, X[ 4],  6);
+   HHH(ddd, aaa, bbb, ccc, X[ 9], 15);
+   HHH(ccc, ddd, aaa, bbb, X[ 1], 13);
+   HHH(bbb, ccc, ddd, aaa, X[ 2], 11);
+
+   /* parallel round 3 */   
+   GGG(aaa, bbb, ccc, ddd, X[15],  9);
+   GGG(ddd, aaa, bbb, ccc, X[ 5],  7);
+   GGG(ccc, ddd, aaa, bbb, X[ 1], 15);
+   GGG(bbb, ccc, ddd, aaa, X[ 3], 11);
+   GGG(aaa, bbb, ccc, ddd, X[ 7],  8);
+   GGG(ddd, aaa, bbb, ccc, X[14],  6);
+   GGG(ccc, ddd, aaa, bbb, X[ 6],  6);
+   GGG(bbb, ccc, ddd, aaa, X[ 9], 14);
+   GGG(aaa, bbb, ccc, ddd, X[11], 12);
+   GGG(ddd, aaa, bbb, ccc, X[ 8], 13);
+   GGG(ccc, ddd, aaa, bbb, X[12],  5);
+   GGG(bbb, ccc, ddd, aaa, X[ 2], 14);
+   GGG(aaa, bbb, ccc, ddd, X[10], 13);
+   GGG(ddd, aaa, bbb, ccc, X[ 0], 13);
+   GGG(ccc, ddd, aaa, bbb, X[ 4],  7);
+   GGG(bbb, ccc, ddd, aaa, X[13],  5);
+
+   /* parallel round 4 */
+   FFF(aaa, bbb, ccc, ddd, X[ 8], 15);
+   FFF(ddd, aaa, bbb, ccc, X[ 6],  5);
+   FFF(ccc, ddd, aaa, bbb, X[ 4],  8);
+   FFF(bbb, ccc, ddd, aaa, X[ 1], 11);
+   FFF(aaa, bbb, ccc, ddd, X[ 3], 14);
+   FFF(ddd, aaa, bbb, ccc, X[11], 14);
+   FFF(ccc, ddd, aaa, bbb, X[15],  6);
+   FFF(bbb, ccc, ddd, aaa, X[ 0], 14);
+   FFF(aaa, bbb, ccc, ddd, X[ 5],  6);
+   FFF(ddd, aaa, bbb, ccc, X[12],  9);
+   FFF(ccc, ddd, aaa, bbb, X[ 2], 12);
+   FFF(bbb, ccc, ddd, aaa, X[13],  9);
+   FFF(aaa, bbb, ccc, ddd, X[ 9], 12);
+   FFF(ddd, aaa, bbb, ccc, X[ 7],  5);
+   FFF(ccc, ddd, aaa, bbb, X[10], 15);
+   FFF(bbb, ccc, ddd, aaa, X[14],  8);
+
+   /* combine results */
+   ddd += cc + md->rmd128.state[1];               /* final result for MDbuf[0] */
+   md->rmd128.state[1] = md->rmd128.state[2] + dd + aaa;
+   md->rmd128.state[2] = md->rmd128.state[3] + aa + bbb;
+   md->rmd128.state[3] = md->rmd128.state[0] + bb + ccc;
+   md->rmd128.state[0] = ddd;
+}
+
+#ifdef CLEAN_STACK
+static void rmd128_compress(hash_state *md, unsigned char *buf)
+{
+   _rmd128_compress(md, buf);
+   burn_stack(sizeof(ulong32) * 24 + sizeof(int));
+}
+#endif
+
+void rmd128_init(hash_state * md)
+{
+   _ARGCHK(md != NULL);
+   md->rmd128.state[0] = 0x67452301UL;
+   md->rmd128.state[1] = 0xefcdab89UL;
+   md->rmd128.state[2] = 0x98badcfeUL;
+   md->rmd128.state[3] = 0x10325476UL;
+   md->rmd128.curlen   = 0;
+   md->rmd128.length   = 0;
+}
+
+HASH_PROCESS(rmd128_process, rmd128_compress, rmd128, 64)
+
+int rmd128_done(hash_state * md, unsigned char *hash)
+{
+    int i;
+
+    _ARGCHK(md != NULL);
+    _ARGCHK(hash != NULL);
+
+    if (md->rmd128.curlen >= sizeof(md->rmd128.buf)) {
+       return CRYPT_INVALID_ARG;
+    }
+
+
+    /* increase the length of the message */
+    md->rmd128.length += md->rmd128.curlen * 8;
+
+    /* append the '1' bit */
+    md->rmd128.buf[md->rmd128.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->rmd128.curlen > 56) {
+        while (md->rmd128.curlen < 64) {
+            md->rmd128.buf[md->rmd128.curlen++] = (unsigned char)0;
+        }
+        rmd128_compress(md, md->rmd128.buf);
+        md->rmd128.curlen = 0;
+    }
+
+    /* pad upto 56 bytes of zeroes */
+    while (md->rmd128.curlen < 56) {
+        md->rmd128.buf[md->rmd128.curlen++] = (unsigned char)0;
+    }
+
+    /* store length */
+    STORE64L(md->rmd128.length, md->rmd128.buf+56);
+    rmd128_compress(md, md->rmd128.buf);
+
+    /* copy output */
+    for (i = 0; i < 4; i++) {
+        STORE32L(md->rmd128.state[i], hash+(4*i));
+    }
+#ifdef CLEAN_STACK
+    zeromem(md, sizeof(hash_state));
+#endif
+   return CRYPT_OK;  
+}
+
+int rmd128_test(void)
+{
+#ifndef LTC_TEST
+   return CRYPT_NOP;
+#else
+   static const struct {
+        char *msg;
+        unsigned char md[16];
+   } tests[] = {
+   { "",
+     { 0xcd, 0xf2, 0x62, 0x13, 0xa1, 0x50, 0xdc, 0x3e,
+       0xcb, 0x61, 0x0f, 0x18, 0xf6, 0xb3, 0x8b, 0x46 }
+   },
+   { "a",
+     { 0x86, 0xbe, 0x7a, 0xfa, 0x33, 0x9d, 0x0f, 0xc7,
+       0xcf, 0xc7, 0x85, 0xe7, 0x2f, 0x57, 0x8d, 0x33 }
+   },
+   { "abc",
+     { 0xc1, 0x4a, 0x12, 0x19, 0x9c, 0x66, 0xe4, 0xba,
+       0x84, 0x63, 0x6b, 0x0f, 0x69, 0x14, 0x4c, 0x77 }
+   },
+   { "message digest",
+     { 0x9e, 0x32, 0x7b, 0x3d, 0x6e, 0x52, 0x30, 0x62,
+       0xaf, 0xc1, 0x13, 0x2d, 0x7d, 0xf9, 0xd1, 0xb8 }
+   },
+   { "abcdefghijklmnopqrstuvwxyz",
+     { 0xfd, 0x2a, 0xa6, 0x07, 0xf7, 0x1d, 0xc8, 0xf5,
+       0x10, 0x71, 0x49, 0x22, 0xb3, 0x71, 0x83, 0x4e }
+   },
+   { "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789",
+     { 0xd1, 0xe9, 0x59, 0xeb, 0x17, 0x9c, 0x91, 0x1f,
+       0xae, 0xa4, 0x62, 0x4c, 0x60, 0xc5, 0xc7, 0x02 }
+   }
+   };
+   int x;
+   unsigned char buf[16];
+   hash_state md;
+
+   for (x = 0; x < (int)(sizeof(tests)/sizeof(tests[0])); x++) {
+       rmd128_init(&md);
+       rmd128_process(&md, (unsigned char *)tests[x].msg, strlen(tests[x].msg));
+       rmd128_done(&md, buf);
+       if (memcmp(buf, tests[x].md, 16) != 0) {
+       #if 0
+          printf("Failed test %d\n", x);
+       #endif
+          return CRYPT_FAIL_TESTVECTOR;
+       }
+   }
+   return CRYPT_OK;
+#endif
+}
+
+#endif
+