Diff: sha1.cpp

Revision:

132:09b66cc5cf4a

Parent:

131:134b6d0c11e9

Child:

133:0f5b4085b6d3

--- a/sha1.cpp	Mon Aug 14 10:50:31 2017 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,285 +0,0 @@
-/*
-SHA-1 in C
-By Steve Reid <steve@edmweb.com>
-100% Public Domain
-*/
-
-#define SHA1HANDSOFF
-
-#include <stdio.h>
-#include <string.h>
-
-/* for uint32_t */
-#include <stdint.h>
-
-#include "sha1.h"
-
-
-#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
-
-/* blk0() and blk() perform the initial expand. */
-/* I got the idea of expanding during the round function from SSLeay */
-#if BYTE_ORDER == LITTLE_ENDIAN
-#define blk0(i) (block->l[i] = (rol(block->l[i],24)&0xFF00FF00) \
-    |(rol(block->l[i],8)&0x00FF00FF))
-#elif BYTE_ORDER == BIG_ENDIAN
-#define blk0(i) block->l[i]
-#else
-#error "Endianness not defined!"
-#endif
-#define blk(i) (block->l[i&15] = rol(block->l[(i+13)&15]^block->l[(i+8)&15] \
-    ^block->l[(i+2)&15]^block->l[i&15],1))
-
-/* (R0+R1), R2, R3, R4 are the different operations used in SHA1 */
-#define R0(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk0(i)+0x5A827999+rol(v,5);w=rol(w,30);
-#define R1(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk(i)+0x5A827999+rol(v,5);w=rol(w,30);
-#define R2(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0x6ED9EBA1+rol(v,5);w=rol(w,30);
-#define R3(v,w,x,y,z,i) z+=(((w|x)&y)|(w&x))+blk(i)+0x8F1BBCDC+rol(v,5);w=rol(w,30);
-#define R4(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0xCA62C1D6+rol(v,5);w=rol(w,30);
-
-
-/* Hash a single 512-bit block. This is the core of the algorithm. */
-
-void SHA1Transform(
-    uint32_t state[5],
-    const unsigned char buffer[64]
-)
-{
-    uint32_t a, b, c, d, e;
-
-    typedef union
-    {
-        unsigned char c[64];
-        uint32_t l[16];
-    } CHAR64LONG16;
-
-#ifdef SHA1HANDSOFF
-    CHAR64LONG16 block[1];      /* use array to appear as a pointer */
-
-    memcpy(block, buffer, 64);
-#else
-    /* The following had better never be used because it causes the
-     * pointer-to-const buffer to be cast into a pointer to non-const.
-     * And the result is written through.  I threw a "const" in, hoping
-     * this will cause a diagnostic.
-     */
-    CHAR64LONG16 *block = (const CHAR64LONG16 *) buffer;
-#endif
-    /* Copy context->state[] to working vars */
-    a = state[0];
-    b = state[1];
-    c = state[2];
-    d = state[3];
-    e = state[4];
-    /* 4 rounds of 20 operations each. Loop unrolled. */
-    R0(a, b, c, d, e, 0);
-    R0(e, a, b, c, d, 1);
-    R0(d, e, a, b, c, 2);
-    R0(c, d, e, a, b, 3);
-    R0(b, c, d, e, a, 4);
-    R0(a, b, c, d, e, 5);
-    R0(e, a, b, c, d, 6);
-    R0(d, e, a, b, c, 7);
-    R0(c, d, e, a, b, 8);
-    R0(b, c, d, e, a, 9);
-    R0(a, b, c, d, e, 10);
-    R0(e, a, b, c, d, 11);
-    R0(d, e, a, b, c, 12);
-    R0(c, d, e, a, b, 13);
-    R0(b, c, d, e, a, 14);
-    R0(a, b, c, d, e, 15);
-    R1(e, a, b, c, d, 16);
-    R1(d, e, a, b, c, 17);
-    R1(c, d, e, a, b, 18);
-    R1(b, c, d, e, a, 19);
-    R2(a, b, c, d, e, 20);
-    R2(e, a, b, c, d, 21);
-    R2(d, e, a, b, c, 22);
-    R2(c, d, e, a, b, 23);
-    R2(b, c, d, e, a, 24);
-    R2(a, b, c, d, e, 25);
-    R2(e, a, b, c, d, 26);
-    R2(d, e, a, b, c, 27);
-    R2(c, d, e, a, b, 28);
-    R2(b, c, d, e, a, 29);
-    R2(a, b, c, d, e, 30);
-    R2(e, a, b, c, d, 31);
-    R2(d, e, a, b, c, 32);
-    R2(c, d, e, a, b, 33);
-    R2(b, c, d, e, a, 34);
-    R2(a, b, c, d, e, 35);
-    R2(e, a, b, c, d, 36);
-    R2(d, e, a, b, c, 37);
-    R2(c, d, e, a, b, 38);
-    R2(b, c, d, e, a, 39);
-    R3(a, b, c, d, e, 40);
-    R3(e, a, b, c, d, 41);
-    R3(d, e, a, b, c, 42);
-    R3(c, d, e, a, b, 43);
-    R3(b, c, d, e, a, 44);
-    R3(a, b, c, d, e, 45);
-    R3(e, a, b, c, d, 46);
-    R3(d, e, a, b, c, 47);
-    R3(c, d, e, a, b, 48);
-    R3(b, c, d, e, a, 49);
-    R3(a, b, c, d, e, 50);
-    R3(e, a, b, c, d, 51);
-    R3(d, e, a, b, c, 52);
-    R3(c, d, e, a, b, 53);
-    R3(b, c, d, e, a, 54);
-    R3(a, b, c, d, e, 55);
-    R3(e, a, b, c, d, 56);
-    R3(d, e, a, b, c, 57);
-    R3(c, d, e, a, b, 58);
-    R3(b, c, d, e, a, 59);
-    R4(a, b, c, d, e, 60);
-    R4(e, a, b, c, d, 61);
-    R4(d, e, a, b, c, 62);
-    R4(c, d, e, a, b, 63);
-    R4(b, c, d, e, a, 64);
-    R4(a, b, c, d, e, 65);
-    R4(e, a, b, c, d, 66);
-    R4(d, e, a, b, c, 67);
-    R4(c, d, e, a, b, 68);
-    R4(b, c, d, e, a, 69);
-    R4(a, b, c, d, e, 70);
-    R4(e, a, b, c, d, 71);
-    R4(d, e, a, b, c, 72);
-    R4(c, d, e, a, b, 73);
-    R4(b, c, d, e, a, 74);
-    R4(a, b, c, d, e, 75);
-    R4(e, a, b, c, d, 76);
-    R4(d, e, a, b, c, 77);
-    R4(c, d, e, a, b, 78);
-    R4(b, c, d, e, a, 79);
-    /* Add the working vars back into context.state[] */
-    state[0] += a;
-    state[1] += b;
-    state[2] += c;
-    state[3] += d;
-    state[4] += e;
-    /* Wipe variables */
-    a = b = c = d = e = 0;
-#ifdef SHA1HANDSOFF
-    memset(block, '\0', sizeof(block));
-#endif
-}
-
-
-/* SHA1Init - Initialize new context */
-
-void SHA1Init(
-    SHA1_CTX * context
-)
-{
-    /* SHA1 initialization constants */
-    context->state[0] = 0x67452301;
-    context->state[1] = 0xEFCDAB89;
-    context->state[2] = 0x98BADCFE;
-    context->state[3] = 0x10325476;
-    context->state[4] = 0xC3D2E1F0;
-    context->count[0] = context->count[1] = 0;
-}
-
-
-/* Run your data through this. */
-
-void SHA1Update(
-    SHA1_CTX * context,
-    const unsigned char *data,
-    uint32_t len
-)
-{
-    uint32_t i;
-
-    uint32_t j;
-
-    j = context->count[0];
-    if ((context->count[0] += len << 3) < j)
-        context->count[1]++;
-    context->count[1] += (len >> 29);
-    j = (j >> 3) & 63;
-    if ((j + len) > 63)
-    {
-        memcpy(&context->buffer[j], data, (i = 64 - j));
-        SHA1Transform(context->state, context->buffer);
-        for (; i + 63 < len; i += 64)
-        {
-            SHA1Transform(context->state, &data[i]);
-        }
-        j = 0;
-    }
-    else
-        i = 0;
-    memcpy(&context->buffer[j], &data[i], len - i);
-}
-
-
-/* Add padding and return the message digest. */
-
-void SHA1Final(
-    unsigned char digest[20],
-    SHA1_CTX * context
-)
-{
-    unsigned i;
-
-    unsigned char finalcount[8];
-
-    unsigned char c;
-
-#if 0    /* untested "improvement" by DHR */
-    /* Convert context->count to a sequence of bytes
-     * in finalcount.  Second element first, but
-     * big-endian order within element.
-     * But we do it all backwards.
-     */
-    unsigned char *fcp = &finalcount[8];
-
-    for (i = 0; i < 2; i++)
-    {
-        uint32_t t = context->count[i];
-
-        int j;
-
-        for (j = 0; j < 4; t >>= 8, j++)
-            *--fcp = (unsigned char) t}
-#else
-    for (i = 0; i < 8; i++)
-    {
-        finalcount[i] = (unsigned char) ((context->count[(i >= 4 ? 0 : 1)] >> ((3 - (i & 3)) * 8)) & 255);      /* Endian independent */
-    }
-#endif
-    c = 0200;
-    SHA1Update(context, &c, 1);
-    while ((context->count[0] & 504) != 448)
-    {
-        c = 0000;
-        SHA1Update(context, &c, 1);
-    }
-    SHA1Update(context, finalcount, 8); /* Should cause a SHA1Transform() */
-    for (i = 0; i < 20; i++)
-    {
-        digest[i] = (unsigned char)
-            ((context->state[i >> 2] >> ((3 - (i & 3)) * 8)) & 255);
-    }
-    /* Wipe variables */
-    memset(context, '\0', sizeof(*context));
-    memset(&finalcount, '\0', sizeof(finalcount));
-}
-
-void sha1(
-    char *hash_out,
-    const char *str,
-    int len)
-{
-    SHA1_CTX ctx;
-    unsigned int ii;
-
-    SHA1Init(&ctx);
-    for (ii=0; ii<len; ii+=1)
-        SHA1Update(&ctx, (const unsigned char*)str + ii, 1);
-    SHA1Final((unsigned char *)hash_out, &ctx);
-    // hash_out[20] = '\0';
-}
-