/*
-SHA-1 in C
-By Steve Reid <steve@edmweb.com>
-100% Public Domain
+ * SHA-1 in C by Steve Reid <steve@edmweb.com>
+ * 100% Public Domain
+ *
+ * Test Vectors (from FIPS PUB 180-1)
+ * 1) "abc": A9993E36 4706816A BA3E2571 7850C26C 9CD0D89D
+ * 2) "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq": 84983E44 1C3BD26E BAAE4AA1 F95129E5 E54670F1
+ * 3) A million repetitions of "a": 34AA973C D4C4DAA4 F61EEB2B DBAD2731 6534016F
+ */
-Test Vectors (from FIPS PUB 180-1)
-"abc"
- A9993E36 4706816A BA3E2571 7850C26C 9CD0D89D
-"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"
- 84983E44 1C3BD26E BAAE4AA1 F95129E5 E54670F1
-A million repetitions of "a"
- 34AA973C D4C4DAA4 F61EEB2B DBAD2731 6534016F
-*/
-
-/* #define LITTLE_ENDIAN * This should be #define'd already, if true. */
-/* #define SHA1HANDSOFF * Copies data before messing with it. */
-
-#define SHA1HANDSOFF
+#define UL_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) \
+# 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]
+# define blk0(i) block->l[i]
#else
-#error "Endianness not defined!"
+# 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))
#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 ul_SHA1Transform(
- uint32_t state[5],
- const unsigned char buffer[64]
-)
+void ul_SHA1Transform(uint32_t state[5], const unsigned char buffer[64])
{
- uint32_t a, b, c, d, e;
+ uint32_t a, b, c, d, e;
- typedef union
- {
- unsigned char c[64];
- uint32_t l[16];
- } CHAR64LONG16;
+ typedef union {
+ unsigned char c[64];
+ uint32_t l[16];
+ } CHAR64LONG16;
-#ifdef SHA1HANDSOFF
- CHAR64LONG16 block[1]; /* use array to appear as a pointer */
+#ifdef UL_SHA1HANDSOFF
+ CHAR64LONG16 block[1]; /* use array to appear as a pointer */
- memcpy(block, buffer, 64);
+ 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;
+ /* 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));
+ /* 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 UL_SHA1HANDSOFF
+ memset(block, '\0', sizeof(block));
#endif
}
-
/* SHA1Init - Initialize new context */
-void ul_SHA1Init(
- UL_SHA1_CTX * context
-)
+void ul_SHA1Init(UL_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;
+ /* 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 ul_SHA1Update(
- UL_SHA1_CTX * context,
- const unsigned char *data,
- uint32_t len
-)
+void ul_SHA1Update(UL_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));
- ul_SHA1Transform(context->state, context->buffer);
- for (; i + 63 < len; i += 64)
- {
- ul_SHA1Transform(context->state, &data[i]);
- }
- j = 0;
- }
- else
- i = 0;
- memcpy(&context->buffer[j], &data[i], len - i);
+ 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));
+ ul_SHA1Transform(context->state, context->buffer);
+ for (; i + 63 < len; i += 64) {
+ ul_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 ul_SHA1Final(
- unsigned char digest[20],
- UL_SHA1_CTX * context
-)
+void ul_SHA1Final(unsigned char digest[20], UL_SHA1_CTX *context)
{
- unsigned i;
+ unsigned i;
- unsigned char finalcount[8];
+ unsigned char finalcount[8];
- unsigned char c;
+ 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];
+#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];
+ for (i = 0; i < 2; i++) {
+ uint32_t t = context->count[i];
- int j;
+ int j;
- for (j = 0; j < 4; t >>= 8, j++)
- *--fcp = (unsigned char) t}
+ 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 */
- }
+ 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;
- ul_SHA1Update(context, &c, 1);
- while ((context->count[0] & 504) != 448)
- {
- c = 0000;
- ul_SHA1Update(context, &c, 1);
- }
- ul_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));
+ c = 0200;
+ ul_SHA1Update(context, &c, 1);
+ while ((context->count[0] & 504) != 448) {
+ c = 0000;
+ ul_SHA1Update(context, &c, 1);
+ }
+ ul_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 ul_SHA1(
- char *hash_out,
- const char *str,
- unsigned len)
+void ul_SHA1(char *hash_out, const char *str, unsigned len)
{
- UL_SHA1_CTX ctx;
- unsigned int ii;
-
- ul_SHA1Init(&ctx);
- for (ii=0; ii<len; ii+=1)
- ul_SHA1Update(&ctx, (const unsigned char*)str + ii, 1);
- ul_SHA1Final((unsigned char *)hash_out, &ctx);
- hash_out[20] = '\0';
+ UL_SHA1_CTX ctx;
+ unsigned int ii;
+
+ ul_SHA1Init(&ctx);
+ for (ii = 0; ii < len; ii += 1)
+ ul_SHA1Update(&ctx, (const unsigned char *)str + ii, 1);
+ ul_SHA1Final((unsigned char *)hash_out, &ctx);
+ hash_out[20] = '\0';
}
-
projects / thirdparty / util-linux.git / commitdiff
