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authorNicolas Pitre <nico@cam.org>2009-08-12 19:45:48 (GMT)
committerJunio C Hamano <gitster@pobox.com>2009-08-12 20:32:54 (GMT)
commit30ba0de726d92ccfc93009eb60f2c30b0886f61b (patch)
treed05e8bcb6f7dc8348d2c7d9a03fee055ac504818 /block-sha1/sha1.c
parent926172c5e4808726244713ef70398cd38b055f1e (diff)
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block-sha1: move code around
Move the code around so specific architecture hacks are defined first. Also make one line comments actually one line. No code change. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'block-sha1/sha1.c')
-rw-r--r--block-sha1/sha1.c129
1 files changed, 60 insertions, 69 deletions
diff --git a/block-sha1/sha1.c b/block-sha1/sha1.c
index 304cd04..c3f1ae5 100644
--- a/block-sha1/sha1.c
+++ b/block-sha1/sha1.c
@@ -9,74 +9,6 @@
#include "sha1.h"
-/* Hash one 64-byte block of data */
-static void blk_SHA1Block(blk_SHA_CTX *ctx, const unsigned int *data);
-
-void blk_SHA1_Init(blk_SHA_CTX *ctx)
-{
- ctx->size = 0;
-
- /* Initialize H with the magic constants (see FIPS180 for constants)
- */
- ctx->H[0] = 0x67452301;
- ctx->H[1] = 0xefcdab89;
- ctx->H[2] = 0x98badcfe;
- ctx->H[3] = 0x10325476;
- ctx->H[4] = 0xc3d2e1f0;
-}
-
-
-void blk_SHA1_Update(blk_SHA_CTX *ctx, const void *data, unsigned long len)
-{
- int lenW = ctx->size & 63;
-
- ctx->size += len;
-
- /* Read the data into W and process blocks as they get full
- */
- if (lenW) {
- int left = 64 - lenW;
- if (len < left)
- left = len;
- memcpy(lenW + (char *)ctx->W, data, left);
- lenW = (lenW + left) & 63;
- len -= left;
- data += left;
- if (lenW)
- return;
- blk_SHA1Block(ctx, ctx->W);
- }
- while (len >= 64) {
- blk_SHA1Block(ctx, data);
- data += 64;
- len -= 64;
- }
- if (len)
- memcpy(ctx->W, data, len);
-}
-
-
-void blk_SHA1_Final(unsigned char hashout[20], blk_SHA_CTX *ctx)
-{
- static const unsigned char pad[64] = { 0x80 };
- unsigned int padlen[2];
- int i;
-
- /* Pad with a binary 1 (ie 0x80), then zeroes, then length
- */
- padlen[0] = htonl(ctx->size >> 29);
- padlen[1] = htonl(ctx->size << 3);
-
- i = ctx->size & 63;
- blk_SHA1_Update(ctx, pad, 1+ (63 & (55 - i)));
- blk_SHA1_Update(ctx, padlen, 8);
-
- /* Output hash
- */
- for (i = 0; i < 5; i++)
- ((unsigned int *)hashout)[i] = htonl(ctx->H[i]);
-}
-
#if defined(__i386__) || defined(__x86_64__)
#define SHA_ASM(op, x, n) ({ unsigned int __res; __asm__(op " %1,%0":"=r" (__res):"i" (n), "0" (x)); __res; })
@@ -136,7 +68,7 @@ void blk_SHA1_Final(unsigned char hashout[20], blk_SHA_CTX *ctx)
#define T_40_59(t, A, B, C, D, E) SHA_ROUND(t, SHA_MIX, ((B&C)+(D&(B^C))) , 0x8f1bbcdc, A, B, C, D, E )
#define T_60_79(t, A, B, C, D, E) SHA_ROUND(t, SHA_MIX, (B^C^D) , 0xca62c1d6, A, B, C, D, E )
-static void blk_SHA1Block(blk_SHA_CTX *ctx, const unsigned int *data)
+static void blk_SHA1_Block(blk_SHA_CTX *ctx, const unsigned int *data)
{
unsigned int A,B,C,D,E;
unsigned int array[16];
@@ -243,3 +175,62 @@ static void blk_SHA1Block(blk_SHA_CTX *ctx, const unsigned int *data)
ctx->H[3] += D;
ctx->H[4] += E;
}
+
+void blk_SHA1_Init(blk_SHA_CTX *ctx)
+{
+ ctx->size = 0;
+
+ /* Initialize H with the magic constants (see FIPS180 for constants) */
+ ctx->H[0] = 0x67452301;
+ ctx->H[1] = 0xefcdab89;
+ ctx->H[2] = 0x98badcfe;
+ ctx->H[3] = 0x10325476;
+ ctx->H[4] = 0xc3d2e1f0;
+}
+
+void blk_SHA1_Update(blk_SHA_CTX *ctx, const void *data, unsigned long len)
+{
+ int lenW = ctx->size & 63;
+
+ ctx->size += len;
+
+ /* Read the data into W and process blocks as they get full */
+ if (lenW) {
+ int left = 64 - lenW;
+ if (len < left)
+ left = len;
+ memcpy(lenW + (char *)ctx->W, data, left);
+ lenW = (lenW + left) & 63;
+ len -= left;
+ data += left;
+ if (lenW)
+ return;
+ blk_SHA1_Block(ctx, ctx->W);
+ }
+ while (len >= 64) {
+ blk_SHA1_Block(ctx, data);
+ data += 64;
+ len -= 64;
+ }
+ if (len)
+ memcpy(ctx->W, data, len);
+}
+
+void blk_SHA1_Final(unsigned char hashout[20], blk_SHA_CTX *ctx)
+{
+ static const unsigned char pad[64] = { 0x80 };
+ unsigned int padlen[2];
+ int i;
+
+ /* Pad with a binary 1 (ie 0x80), then zeroes, then length */
+ padlen[0] = htonl(ctx->size >> 29);
+ padlen[1] = htonl(ctx->size << 3);
+
+ i = ctx->size & 63;
+ blk_SHA1_Update(ctx, pad, 1+ (63 & (55 - i)));
+ blk_SHA1_Update(ctx, padlen, 8);
+
+ /* Output hash */
+ for (i = 0; i < 5; i++)
+ ((unsigned int *)hashout)[i] = htonl(ctx->H[i]);
+}