-/* Modified for SILC -Pekka */
-
-/* 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.org
- */
+/* Taken from public domain libtomcrypt library and the code and all changes
+ to it are in public domain. -Pekka */
+
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis */
+
#include "silc.h"
#include "sha256_internal.h"
#include "sha256.h"
SILC_HASH_API_TRANSFORM(sha256)
{
- sha256_compress(state, (unsigned char *)buffer);
+ sha256_transform(state, (unsigned char *)buffer);
}
SILC_HASH_API_CONTEXT_LEN(sha256)
#if defined(_MSC_VER)
#pragma intrinsic(_lrotr,_lrotl)
#define RORc(x,n) _lrotr(x,n)
-
-#elif defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__)) && !defined(INTEL_CC)
-
-static inline unsigned RORc(unsigned word, int i)
-{
- asm ("rorl %%cl,%0"
- :"=r" (word)
- :"0" (word),"c" (i));
- return word;
-}
-
#else
-#define RORc(x, y) ( ((((unsigned long)(x)&0xFFFFFFFFUL)>>(unsigned long)((y)&31)) | ((unsigned long)(x)<<(unsigned long)(32-((y)&31)))) &0xFFFFFFFFUL)
+#define RORc(x, y) silc_ror(x, y)
#endif /* _MSC_VER */
/* Various logical functions */
#define Gamma0(x) (S(x, 7) ^ S(x, 18) ^ R(x, 3))
#define Gamma1(x) (S(x, 17) ^ S(x, 19) ^ R(x, 10))
-/* compress 512-bits */
-int sha256_compress(SilcUInt32 *state, unsigned char *buf)
-{
- SilcUInt32 S[8], W[64], t0, t1;
- int i;
-
- /* copy state into S */
- for (i = 0; i < 8; i++) {
- S[i] = state[i];
- }
-
- /* copy the state into 512-bits into W[0..15] */
- for (i = 0; i < 16; i++)
- SILC_GET32_MSB(W[i], buf + (4 * i));
+#ifndef SILC_SHA256_X86
- /* fill W[16..63] */
- for (i = 16; i < 64; i++) {
- W[i] = Gamma1(W[i - 2]) + W[i - 7] + Gamma0(W[i - 15]) + W[i - 16];
- }
-
- /* Compress */
-#define RND(a,b,c,d,e,f,g,h,i,ki) \
- t0 = h + Sigma1(e) + Ch(e, f, g) + ki + W[i]; \
- t1 = Sigma0(a) + Maj(a, b, c); \
- d += t0; \
- h = t0 + t1;
-
- RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],0,0x428a2f98);
- RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],1,0x71374491);
- RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],2,0xb5c0fbcf);
- RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],3,0xe9b5dba5);
- RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],4,0x3956c25b);
- RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],5,0x59f111f1);
- RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],6,0x923f82a4);
- RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],7,0xab1c5ed5);
- RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],8,0xd807aa98);
- RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],9,0x12835b01);
- RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],10,0x243185be);
- RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],11,0x550c7dc3);
- RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],12,0x72be5d74);
- RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],13,0x80deb1fe);
- RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],14,0x9bdc06a7);
- RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],15,0xc19bf174);
- RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],16,0xe49b69c1);
- RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],17,0xefbe4786);
- RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],18,0x0fc19dc6);
- RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],19,0x240ca1cc);
- RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],20,0x2de92c6f);
- RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],21,0x4a7484aa);
- RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],22,0x5cb0a9dc);
- RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],23,0x76f988da);
- RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],24,0x983e5152);
- RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],25,0xa831c66d);
- RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],26,0xb00327c8);
- RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],27,0xbf597fc7);
- RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],28,0xc6e00bf3);
- RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],29,0xd5a79147);
- RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],30,0x06ca6351);
- RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],31,0x14292967);
- RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],32,0x27b70a85);
- RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],33,0x2e1b2138);
- RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],34,0x4d2c6dfc);
- RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],35,0x53380d13);
- RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],36,0x650a7354);
- RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],37,0x766a0abb);
- RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],38,0x81c2c92e);
- RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],39,0x92722c85);
- RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],40,0xa2bfe8a1);
- RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],41,0xa81a664b);
- RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],42,0xc24b8b70);
- RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],43,0xc76c51a3);
- RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],44,0xd192e819);
- RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],45,0xd6990624);
- RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],46,0xf40e3585);
- RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],47,0x106aa070);
- RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],48,0x19a4c116);
- RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],49,0x1e376c08);
- RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],50,0x2748774c);
- RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],51,0x34b0bcb5);
- RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],52,0x391c0cb3);
- RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],53,0x4ed8aa4a);
- RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],54,0x5b9cca4f);
- RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],55,0x682e6ff3);
- RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],56,0x748f82ee);
- RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],57,0x78a5636f);
- RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],58,0x84c87814);
- RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],59,0x8cc70208);
- RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],60,0x90befffa);
- RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],61,0xa4506ceb);
- RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],62,0xbef9a3f7);
- RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],63,0xc67178f2);
+/* Transform 512-bits */
+void sha256_transform(SilcUInt32 *state, unsigned char *buf)
+{
+ SilcUInt32 S[8], W[64], t0, t1;
+ int i;
+
+ /* copy state into S */
+ for (i = 0; i < 8; i++) {
+ S[i] = state[i];
+ }
+
+ /* copy the state into 512-bits into W[0..15] */
+ for (i = 0; i < 16; i++)
+ SILC_GET32_MSB(W[i], buf + (4 * i));
+
+ /* fill W[16..63] */
+ for (i = 16; i < 64; i++) {
+ W[i] = Gamma1(W[i - 2]) + W[i - 7] + Gamma0(W[i - 15]) + W[i - 16];
+ }
+
+ /* Compress */
+#define RND(a,b,c,d,e,f,g,h,i,ki) \
+ t0 = h + Sigma1(e) + Ch(e, f, g) + ki + W[i]; \
+ t1 = Sigma0(a) + Maj(a, b, c); \
+ d += t0; \
+ h = t0 + t1;
+
+ RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],0,0x428a2f98);
+ RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],1,0x71374491);
+ RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],2,0xb5c0fbcf);
+ RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],3,0xe9b5dba5);
+ RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],4,0x3956c25b);
+ RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],5,0x59f111f1);
+ RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],6,0x923f82a4);
+ RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],7,0xab1c5ed5);
+ RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],8,0xd807aa98);
+ RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],9,0x12835b01);
+ RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],10,0x243185be);
+ RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],11,0x550c7dc3);
+ RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],12,0x72be5d74);
+ RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],13,0x80deb1fe);
+ RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],14,0x9bdc06a7);
+ RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],15,0xc19bf174);
+ RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],16,0xe49b69c1);
+ RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],17,0xefbe4786);
+ RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],18,0x0fc19dc6);
+ RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],19,0x240ca1cc);
+ RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],20,0x2de92c6f);
+ RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],21,0x4a7484aa);
+ RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],22,0x5cb0a9dc);
+ RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],23,0x76f988da);
+ RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],24,0x983e5152);
+ RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],25,0xa831c66d);
+ RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],26,0xb00327c8);
+ RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],27,0xbf597fc7);
+ RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],28,0xc6e00bf3);
+ RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],29,0xd5a79147);
+ RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],30,0x06ca6351);
+ RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],31,0x14292967);
+ RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],32,0x27b70a85);
+ RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],33,0x2e1b2138);
+ RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],34,0x4d2c6dfc);
+ RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],35,0x53380d13);
+ RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],36,0x650a7354);
+ RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],37,0x766a0abb);
+ RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],38,0x81c2c92e);
+ RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],39,0x92722c85);
+ RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],40,0xa2bfe8a1);
+ RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],41,0xa81a664b);
+ RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],42,0xc24b8b70);
+ RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],43,0xc76c51a3);
+ RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],44,0xd192e819);
+ RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],45,0xd6990624);
+ RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],46,0xf40e3585);
+ RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],47,0x106aa070);
+ RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],48,0x19a4c116);
+ RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],49,0x1e376c08);
+ RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],50,0x2748774c);
+ RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],51,0x34b0bcb5);
+ RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],52,0x391c0cb3);
+ RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],53,0x4ed8aa4a);
+ RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],54,0x5b9cca4f);
+ RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],55,0x682e6ff3);
+ RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],56,0x748f82ee);
+ RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],57,0x78a5636f);
+ RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],58,0x84c87814);
+ RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],59,0x8cc70208);
+ RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],60,0x90befffa);
+ RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],61,0xa4506ceb);
+ RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],62,0xbef9a3f7);
+ RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],63,0xc67178f2);
#undef RND
- /* feedback */
- for (i = 0; i < 8; i++) {
- state[i] = state[i] + S[i];
- }
- return TRUE;
+ /* feedback */
+ for (i = 0; i < 8; i++) {
+ state[i] = state[i] + S[i];
+ }
}
-/**
- Initialize the hash state
- @param md The hash state you wish to initialize
- @return CRYPT_OK if successful
-*/
+#endif /* !SILC_SHA256_X86 */
+
int sha256_init(sha256_state * md)
{
- md->length = 0;
- md->curlen = 0;
- md->state[0] = 0x6A09E667UL;
- md->state[1] = 0xBB67AE85UL;
- md->state[2] = 0x3C6EF372UL;
- md->state[3] = 0xA54FF53AUL;
- md->state[4] = 0x510E527FUL;
- md->state[5] = 0x9B05688CUL;
- md->state[6] = 0x1F83D9ABUL;
- md->state[7] = 0x5BE0CD19UL;
- return TRUE;
+ md->length = 0;
+ md->curlen = 0;
+ md->state[0] = 0x6A09E667UL;
+ md->state[1] = 0xBB67AE85UL;
+ md->state[2] = 0x3C6EF372UL;
+ md->state[3] = 0xA54FF53AUL;
+ md->state[4] = 0x510E527FUL;
+ md->state[5] = 0x9B05688CUL;
+ md->state[6] = 0x1F83D9ABUL;
+ md->state[7] = 0x5BE0CD19UL;
+ return TRUE;
}
#if !defined(MIN)
#define MIN(x,y) ((x)<(y)?(x):(y))
#endif
-/**
- 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
-*/
int sha256_process(sha256_state * md, const unsigned char *in,
unsigned long inlen)
{
- unsigned long n;
- int err, block_size = sizeof(md->buf);
-
- if (md->curlen > block_size)
- return FALSE;
-
- while (inlen > 0) {
- if (md->curlen == 0 && inlen >= block_size) {
- if ((err = sha256_compress(md->state, (unsigned char *)in)) != TRUE)
- return err;
- md->length += block_size * 8;
- in += block_size;
- inlen -= block_size;
- } else {
- n = MIN(inlen, (block_size - md->curlen));
- memcpy(md->buf + md->curlen, in, (size_t)n);
- md->curlen += n;
- in += n;
- inlen -= n;
- if (md->curlen == block_size) {
- if ((err = sha256_compress(md->state, md->buf)) != TRUE)
- return err;
- md->length += block_size * 8;
- md->curlen = 0;
- }
- }
+ unsigned long n;
+ int block_size = sizeof(md->buf);
+
+ if (md->curlen > block_size)
+ return FALSE;
+
+ while (inlen > 0) {
+ if (md->curlen == 0 && inlen >= block_size) {
+ sha256_transform(md->state, (unsigned char *)in);
+ md->length += block_size * 8;
+ in += block_size;
+ inlen -= block_size;
+ } else {
+ n = MIN(inlen, (block_size - md->curlen));
+ memcpy(md->buf + md->curlen, in, (size_t)n);
+ md->curlen += n;
+ in += n;
+ inlen -= n;
+ if (md->curlen == block_size) {
+ sha256_transform(md->state, md->buf);
+ md->length += block_size * 8;
+ md->curlen = 0;
+ }
}
- return TRUE;
+ }
+ return TRUE;
}
-/**
- Terminate the hash to get the digest
- @param md The hash state
- @param out [out] The destination of the hash (32 bytes)
- @return CRYPT_OK if successful
-*/
int sha256_done(sha256_state * md, unsigned char *out)
{
- int i;
-
- if (md->curlen >= sizeof(md->buf))
- return FALSE;
-
- /* increase the length of the message */
- md->length += md->curlen * 8;
-
- /* append the '1' bit */
- md->buf[md->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->curlen > 56) {
- while (md->curlen < 64) {
- md->buf[md->curlen++] = (unsigned char)0;
- }
- sha256_compress(md->state, md->buf);
- md->curlen = 0;
- }
+ int i;
+
+ if (md->curlen >= sizeof(md->buf))
+ return FALSE;
+
+ /* increase the length of the message */
+ md->length += md->curlen * 8;
- /* pad upto 56 bytes of zeroes */
- while (md->curlen < 56) {
- md->buf[md->curlen++] = (unsigned char)0;
+ /* append the '1' bit */
+ md->buf[md->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->curlen > 56) {
+ while (md->curlen < 64) {
+ md->buf[md->curlen++] = (unsigned char)0;
}
+ sha256_transform(md->state, md->buf);
+ md->curlen = 0;
+ }
+
+ /* pad upto 56 bytes of zeroes */
+ while (md->curlen < 56) {
+ md->buf[md->curlen++] = (unsigned char)0;
+ }
- /* store length */
- SILC_PUT64_MSB(md->length, md->buf + 56);
- sha256_compress(md->state, md->buf);
+ /* store length */
+ SILC_PUT64_MSB(md->length, md->buf + 56);
+ sha256_transform(md->state, md->buf);
- /* copy output */
- for (i = 0; i < 8; i++)
- SILC_PUT32_MSB(md->state[i], out + (4 * i));
+ /* copy output */
+ for (i = 0; i < 8; i += 2) {
+ SILC_PUT32_MSB(md->state[i], out + (4 * i));
+ SILC_PUT32_MSB(md->state[i + 1], out + (4 * (i + 1)));
+ }
- return TRUE;
+ return TRUE;
}