-/* Various size/speed tradeoffs are available. Choose 0..3. */
-#define SHA_CODE_SIZE 0
-
-/*
- * SHA transform algorithm, taken from code written by Peter Gutmann,
- * and placed in the public domain.
- */
-
-/* The SHA f()-functions. */
-
-#define f1(x,y,z) ( z ^ (x & (y^z)) ) /* Rounds 0-19: x ? y : z */
-#define f2(x,y,z) (x ^ y ^ z) /* Rounds 20-39: XOR */
-#define f3(x,y,z) ( (x & y) + (z & (x ^ y)) ) /* Rounds 40-59: majority */
-#define f4(x,y,z) (x ^ y ^ z) /* Rounds 60-79: XOR */
-
-/* The SHA Mysterious Constants */
-
-#define K1 0x5A827999L /* Rounds 0-19: sqrt(2) * 2^30 */
-#define K2 0x6ED9EBA1L /* Rounds 20-39: sqrt(3) * 2^30 */
-#define K3 0x8F1BBCDCL /* Rounds 40-59: sqrt(5) * 2^30 */
-#define K4 0xCA62C1D6L /* Rounds 60-79: sqrt(10) * 2^30 */
-
-#define ROTL(n,X) ( ( ( X ) << n ) | ( ( X ) >> ( 32 - n ) ) )
-
-#define subRound(a, b, c, d, e, f, k, data) \
- ( e += ROTL( 5, a ) + f( b, c, d ) + k + data, b = ROTL( 30, b ) )
-
-
-static void SHATransform(__u32 digest[85], __u32 const data[16])
-{
- __u32 A, B, C, D, E; /* Local vars */
- __u32 TEMP;
- int i;
-#define W (digest + HASH_BUFFER_SIZE) /* Expanded data array */
-
- /*
- * Do the preliminary expansion of 16 to 80 words. Doing it
- * out-of-line line this is faster than doing it in-line on
- * register-starved machines like the x86, and not really any
- * slower on real processors.
- */
- memcpy(W, data, 16*sizeof(__u32));
- for (i = 0; i < 64; i++) {
- TEMP = W[i] ^ W[i+2] ^ W[i+8] ^ W[i+13];
- W[i+16] = ROTL(1, TEMP);
- }
-
- /* Set up first buffer and local data buffer */
- A = digest[ 0 ];
- B = digest[ 1 ];
- C = digest[ 2 ];
- D = digest[ 3 ];
- E = digest[ 4 ];
-
- /* Heavy mangling, in 4 sub-rounds of 20 iterations each. */
-#if SHA_CODE_SIZE == 0
- /*
- * Approximately 50% of the speed of the largest version, but
- * takes up 1/16 the space. Saves about 6k on an i386 kernel.
- */
- for (i = 0; i < 80; i++) {
- if (i < 40) {
- if (i < 20)
- TEMP = f1(B, C, D) + K1;
- else
- TEMP = f2(B, C, D) + K2;
- } else {
- if (i < 60)
- TEMP = f3(B, C, D) + K3;
- else
- TEMP = f4(B, C, D) + K4;
- }
- TEMP += ROTL(5, A) + E + W[i];
- E = D; D = C; C = ROTL(30, B); B = A; A = TEMP;
- }
-#elif SHA_CODE_SIZE == 1
- for (i = 0; i < 20; i++) {
- TEMP = f1(B, C, D) + K1 + ROTL(5, A) + E + W[i];
- E = D; D = C; C = ROTL(30, B); B = A; A = TEMP;
- }
- for (; i < 40; i++) {
- TEMP = f2(B, C, D) + K2 + ROTL(5, A) + E + W[i];
- E = D; D = C; C = ROTL(30, B); B = A; A = TEMP;
- }
- for (; i < 60; i++) {
- TEMP = f3(B, C, D) + K3 + ROTL(5, A) + E + W[i];
- E = D; D = C; C = ROTL(30, B); B = A; A = TEMP;
- }
- for (; i < 80; i++) {
- TEMP = f4(B, C, D) + K4 + ROTL(5, A) + E + W[i];
- E = D; D = C; C = ROTL(30, B); B = A; A = TEMP;
- }
-#elif SHA_CODE_SIZE == 2
- for (i = 0; i < 20; i += 5) {
- subRound( A, B, C, D, E, f1, K1, W[ i ] );
- subRound( E, A, B, C, D, f1, K1, W[ i+1 ] );
- subRound( D, E, A, B, C, f1, K1, W[ i+2 ] );
- subRound( C, D, E, A, B, f1, K1, W[ i+3 ] );
- subRound( B, C, D, E, A, f1, K1, W[ i+4 ] );
- }
- for (; i < 40; i += 5) {
- subRound( A, B, C, D, E, f2, K2, W[ i ] );
- subRound( E, A, B, C, D, f2, K2, W[ i+1 ] );
- subRound( D, E, A, B, C, f2, K2, W[ i+2 ] );
- subRound( C, D, E, A, B, f2, K2, W[ i+3 ] );
- subRound( B, C, D, E, A, f2, K2, W[ i+4 ] );
- }
- for (; i < 60; i += 5) {
- subRound( A, B, C, D, E, f3, K3, W[ i ] );
- subRound( E, A, B, C, D, f3, K3, W[ i+1 ] );
- subRound( D, E, A, B, C, f3, K3, W[ i+2 ] );
- subRound( C, D, E, A, B, f3, K3, W[ i+3 ] );
- subRound( B, C, D, E, A, f3, K3, W[ i+4 ] );
- }
- for (; i < 80; i += 5) {
- subRound( A, B, C, D, E, f4, K4, W[ i ] );
- subRound( E, A, B, C, D, f4, K4, W[ i+1 ] );
- subRound( D, E, A, B, C, f4, K4, W[ i+2 ] );
- subRound( C, D, E, A, B, f4, K4, W[ i+3 ] );
- subRound( B, C, D, E, A, f4, K4, W[ i+4 ] );
- }
-#elif SHA_CODE_SIZE == 3 /* Really large version */
- subRound( A, B, C, D, E, f1, K1, W[ 0 ] );
- subRound( E, A, B, C, D, f1, K1, W[ 1 ] );
- subRound( D, E, A, B, C, f1, K1, W[ 2 ] );
- subRound( C, D, E, A, B, f1, K1, W[ 3 ] );
- subRound( B, C, D, E, A, f1, K1, W[ 4 ] );
- subRound( A, B, C, D, E, f1, K1, W[ 5 ] );
- subRound( E, A, B, C, D, f1, K1, W[ 6 ] );
- subRound( D, E, A, B, C, f1, K1, W[ 7 ] );
- subRound( C, D, E, A, B, f1, K1, W[ 8 ] );
- subRound( B, C, D, E, A, f1, K1, W[ 9 ] );
- subRound( A, B, C, D, E, f1, K1, W[ 10 ] );
- subRound( E, A, B, C, D, f1, K1, W[ 11 ] );
- subRound( D, E, A, B, C, f1, K1, W[ 12 ] );
- subRound( C, D, E, A, B, f1, K1, W[ 13 ] );
- subRound( B, C, D, E, A, f1, K1, W[ 14 ] );
- subRound( A, B, C, D, E, f1, K1, W[ 15 ] );
- subRound( E, A, B, C, D, f1, K1, W[ 16 ] );
- subRound( D, E, A, B, C, f1, K1, W[ 17 ] );
- subRound( C, D, E, A, B, f1, K1, W[ 18 ] );
- subRound( B, C, D, E, A, f1, K1, W[ 19 ] );
-
- subRound( A, B, C, D, E, f2, K2, W[ 20 ] );
- subRound( E, A, B, C, D, f2, K2, W[ 21 ] );
- subRound( D, E, A, B, C, f2, K2, W[ 22 ] );
- subRound( C, D, E, A, B, f2, K2, W[ 23 ] );
- subRound( B, C, D, E, A, f2, K2, W[ 24 ] );
- subRound( A, B, C, D, E, f2, K2, W[ 25 ] );
- subRound( E, A, B, C, D, f2, K2, W[ 26 ] );
- subRound( D, E, A, B, C, f2, K2, W[ 27 ] );
- subRound( C, D, E, A, B, f2, K2, W[ 28 ] );
- subRound( B, C, D, E, A, f2, K2, W[ 29 ] );
- subRound( A, B, C, D, E, f2, K2, W[ 30 ] );
- subRound( E, A, B, C, D, f2, K2, W[ 31 ] );
- subRound( D, E, A, B, C, f2, K2, W[ 32 ] );
- subRound( C, D, E, A, B, f2, K2, W[ 33 ] );
- subRound( B, C, D, E, A, f2, K2, W[ 34 ] );
- subRound( A, B, C, D, E, f2, K2, W[ 35 ] );
- subRound( E, A, B, C, D, f2, K2, W[ 36 ] );
- subRound( D, E, A, B, C, f2, K2, W[ 37 ] );
- subRound( C, D, E, A, B, f2, K2, W[ 38 ] );
- subRound( B, C, D, E, A, f2, K2, W[ 39 ] );
-
- subRound( A, B, C, D, E, f3, K3, W[ 40 ] );
- subRound( E, A, B, C, D, f3, K3, W[ 41 ] );
- subRound( D, E, A, B, C, f3, K3, W[ 42 ] );
- subRound( C, D, E, A, B, f3, K3, W[ 43 ] );
- subRound( B, C, D, E, A, f3, K3, W[ 44 ] );
- subRound( A, B, C, D, E, f3, K3, W[ 45 ] );
- subRound( E, A, B, C, D, f3, K3, W[ 46 ] );
- subRound( D, E, A, B, C, f3, K3, W[ 47 ] );
- subRound( C, D, E, A, B, f3, K3, W[ 48 ] );
- subRound( B, C, D, E, A, f3, K3, W[ 49 ] );
- subRound( A, B, C, D, E, f3, K3, W[ 50 ] );
- subRound( E, A, B, C, D, f3, K3, W[ 51 ] );
- subRound( D, E, A, B, C, f3, K3, W[ 52 ] );
- subRound( C, D, E, A, B, f3, K3, W[ 53 ] );
- subRound( B, C, D, E, A, f3, K3, W[ 54 ] );
- subRound( A, B, C, D, E, f3, K3, W[ 55 ] );
- subRound( E, A, B, C, D, f3, K3, W[ 56 ] );
- subRound( D, E, A, B, C, f3, K3, W[ 57 ] );
- subRound( C, D, E, A, B, f3, K3, W[ 58 ] );
- subRound( B, C, D, E, A, f3, K3, W[ 59 ] );
-
- subRound( A, B, C, D, E, f4, K4, W[ 60 ] );
- subRound( E, A, B, C, D, f4, K4, W[ 61 ] );
- subRound( D, E, A, B, C, f4, K4, W[ 62 ] );
- subRound( C, D, E, A, B, f4, K4, W[ 63 ] );
- subRound( B, C, D, E, A, f4, K4, W[ 64 ] );
- subRound( A, B, C, D, E, f4, K4, W[ 65 ] );
- subRound( E, A, B, C, D, f4, K4, W[ 66 ] );
- subRound( D, E, A, B, C, f4, K4, W[ 67 ] );
- subRound( C, D, E, A, B, f4, K4, W[ 68 ] );
- subRound( B, C, D, E, A, f4, K4, W[ 69 ] );
- subRound( A, B, C, D, E, f4, K4, W[ 70 ] );
- subRound( E, A, B, C, D, f4, K4, W[ 71 ] );
- subRound( D, E, A, B, C, f4, K4, W[ 72 ] );
- subRound( C, D, E, A, B, f4, K4, W[ 73 ] );
- subRound( B, C, D, E, A, f4, K4, W[ 74 ] );
- subRound( A, B, C, D, E, f4, K4, W[ 75 ] );
- subRound( E, A, B, C, D, f4, K4, W[ 76 ] );
- subRound( D, E, A, B, C, f4, K4, W[ 77 ] );
- subRound( C, D, E, A, B, f4, K4, W[ 78 ] );
- subRound( B, C, D, E, A, f4, K4, W[ 79 ] );
-#else
-#error Illegal SHA_CODE_SIZE
-#endif
-
- /* Build message digest */
- digest[ 0 ] += A;
- digest[ 1 ] += B;
- digest[ 2 ] += C;
- digest[ 3 ] += D;
- digest[ 4 ] += E;
-
- /* W is wiped by the caller */
-#undef W
-}
-
-#undef ROTL
-#undef f1
-#undef f2
-#undef f3
-#undef f4
-#undef K1
-#undef K2
-#undef K3
-#undef K4
-#undef subRound
-
-#else /* !USE_SHA - Use MD5 */
-
-#define HASH_BUFFER_SIZE 4
-#define HASH_EXTRA_SIZE 0
-#define HASH_TRANSFORM MD5Transform
-
-/*
- * MD5 transform algorithm, taken from code written by Colin Plumb,
- * and put into the public domain
- */
-
-/* The four core functions - F1 is optimized somewhat */
-
-/* #define F1(x, y, z) (x & y | ~x & z) */
-#define F1(x, y, z) (z ^ (x & (y ^ z)))
-#define F2(x, y, z) F1(z, x, y)
-#define F3(x, y, z) (x ^ y ^ z)
-#define F4(x, y, z) (y ^ (x | ~z))
-
-/* This is the central step in the MD5 algorithm. */
-#define MD5STEP(f, w, x, y, z, data, s) \
- ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x )
-
-/*
- * The core of the MD5 algorithm, this alters an existing MD5 hash to
- * reflect the addition of 16 longwords of new data. MD5Update blocks
- * the data and converts bytes into longwords for this routine.
- */
-static void MD5Transform(__u32 buf[HASH_BUFFER_SIZE], __u32 const in[16])
-{
- __u32 a, b, c, d;
-
- a = buf[0];
- b = buf[1];
- c = buf[2];
- d = buf[3];
-
- MD5STEP(F1, a, b, c, d, in[ 0]+0xd76aa478, 7);
- MD5STEP(F1, d, a, b, c, in[ 1]+0xe8c7b756, 12);
- MD5STEP(F1, c, d, a, b, in[ 2]+0x242070db, 17);
- MD5STEP(F1, b, c, d, a, in[ 3]+0xc1bdceee, 22);
- MD5STEP(F1, a, b, c, d, in[ 4]+0xf57c0faf, 7);
- MD5STEP(F1, d, a, b, c, in[ 5]+0x4787c62a, 12);
- MD5STEP(F1, c, d, a, b, in[ 6]+0xa8304613, 17);
- MD5STEP(F1, b, c, d, a, in[ 7]+0xfd469501, 22);
- MD5STEP(F1, a, b, c, d, in[ 8]+0x698098d8, 7);
- MD5STEP(F1, d, a, b, c, in[ 9]+0x8b44f7af, 12);
- MD5STEP(F1, c, d, a, b, in[10]+0xffff5bb1, 17);
- MD5STEP(F1, b, c, d, a, in[11]+0x895cd7be, 22);
- MD5STEP(F1, a, b, c, d, in[12]+0x6b901122, 7);
- MD5STEP(F1, d, a, b, c, in[13]+0xfd987193, 12);
- MD5STEP(F1, c, d, a, b, in[14]+0xa679438e, 17);
- MD5STEP(F1, b, c, d, a, in[15]+0x49b40821, 22);
-
- MD5STEP(F2, a, b, c, d, in[ 1]+0xf61e2562, 5);
- MD5STEP(F2, d, a, b, c, in[ 6]+0xc040b340, 9);
- MD5STEP(F2, c, d, a, b, in[11]+0x265e5a51, 14);
- MD5STEP(F2, b, c, d, a, in[ 0]+0xe9b6c7aa, 20);
- MD5STEP(F2, a, b, c, d, in[ 5]+0xd62f105d, 5);
- MD5STEP(F2, d, a, b, c, in[10]+0x02441453, 9);
- MD5STEP(F2, c, d, a, b, in[15]+0xd8a1e681, 14);
- MD5STEP(F2, b, c, d, a, in[ 4]+0xe7d3fbc8, 20);
- MD5STEP(F2, a, b, c, d, in[ 9]+0x21e1cde6, 5);
- MD5STEP(F2, d, a, b, c, in[14]+0xc33707d6, 9);
- MD5STEP(F2, c, d, a, b, in[ 3]+0xf4d50d87, 14);
- MD5STEP(F2, b, c, d, a, in[ 8]+0x455a14ed, 20);
- MD5STEP(F2, a, b, c, d, in[13]+0xa9e3e905, 5);
- MD5STEP(F2, d, a, b, c, in[ 2]+0xfcefa3f8, 9);
- MD5STEP(F2, c, d, a, b, in[ 7]+0x676f02d9, 14);
- MD5STEP(F2, b, c, d, a, in[12]+0x8d2a4c8a, 20);
-
- MD5STEP(F3, a, b, c, d, in[ 5]+0xfffa3942, 4);
- MD5STEP(F3, d, a, b, c, in[ 8]+0x8771f681, 11);
- MD5STEP(F3, c, d, a, b, in[11]+0x6d9d6122, 16);
- MD5STEP(F3, b, c, d, a, in[14]+0xfde5380c, 23);
- MD5STEP(F3, a, b, c, d, in[ 1]+0xa4beea44, 4);
- MD5STEP(F3, d, a, b, c, in[ 4]+0x4bdecfa9, 11);
- MD5STEP(F3, c, d, a, b, in[ 7]+0xf6bb4b60, 16);
- MD5STEP(F3, b, c, d, a, in[10]+0xbebfbc70, 23);
- MD5STEP(F3, a, b, c, d, in[13]+0x289b7ec6, 4);
- MD5STEP(F3, d, a, b, c, in[ 0]+0xeaa127fa, 11);
- MD5STEP(F3, c, d, a, b, in[ 3]+0xd4ef3085, 16);
- MD5STEP(F3, b, c, d, a, in[ 6]+0x04881d05, 23);
- MD5STEP(F3, a, b, c, d, in[ 9]+0xd9d4d039, 4);
- MD5STEP(F3, d, a, b, c, in[12]+0xe6db99e5, 11);
- MD5STEP(F3, c, d, a, b, in[15]+0x1fa27cf8, 16);
- MD5STEP(F3, b, c, d, a, in[ 2]+0xc4ac5665, 23);
-
- MD5STEP(F4, a, b, c, d, in[ 0]+0xf4292244, 6);
- MD5STEP(F4, d, a, b, c, in[ 7]+0x432aff97, 10);
- MD5STEP(F4, c, d, a, b, in[14]+0xab9423a7, 15);
- MD5STEP(F4, b, c, d, a, in[ 5]+0xfc93a039, 21);
- MD5STEP(F4, a, b, c, d, in[12]+0x655b59c3, 6);
- MD5STEP(F4, d, a, b, c, in[ 3]+0x8f0ccc92, 10);
- MD5STEP(F4, c, d, a, b, in[10]+0xffeff47d, 15);
- MD5STEP(F4, b, c, d, a, in[ 1]+0x85845dd1, 21);
- MD5STEP(F4, a, b, c, d, in[ 8]+0x6fa87e4f, 6);
- MD5STEP(F4, d, a, b, c, in[15]+0xfe2ce6e0, 10);
- MD5STEP(F4, c, d, a, b, in[ 6]+0xa3014314, 15);
- MD5STEP(F4, b, c, d, a, in[13]+0x4e0811a1, 21);
- MD5STEP(F4, a, b, c, d, in[ 4]+0xf7537e82, 6);
- MD5STEP(F4, d, a, b, c, in[11]+0xbd3af235, 10);
- MD5STEP(F4, c, d, a, b, in[ 2]+0x2ad7d2bb, 15);
- MD5STEP(F4, b, c, d, a, in[ 9]+0xeb86d391, 21);
-
- buf[0] += a;
- buf[1] += b;
- buf[2] += c;
- buf[3] += d;