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Made it temporarily possible to call MD5 routines directly from external

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code, rather than going through the digest layer.

Removed a spurious line of constants.
This commit is contained in:
Michael Brown 2006-11-15 04:22:22 +00:00
parent ea97fe42dd
commit 57d539aab0
2 changed files with 37 additions and 21 deletions
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33
src/crypto/md5.c
View File

@ -24,16 +24,7 @@
#include <string.h>
#include <byteswap.h>
#include <gpxe/crypto.h>
#define MD5_DIGEST_SIZE 16
#define MD5_BLOCK_WORDS 16
#define MD5_HASH_WORDS 4
struct md5_ctx {
u32 hash[MD5_HASH_WORDS];
u32 block[MD5_BLOCK_WORDS];
u64 byte_count;
};
#include <gpxe/md5.h>
#define __md5step __attribute__ (( regparm ( 3 ) ))
@ -93,7 +84,7 @@ static const u8 r[64] = {
6,10,15,21,6,10,15,21,6,10,15,21,6,10,15,21
};
static const u32 k[] = {
static const u32 k[64] = {
0xd76aa478UL, 0xe8c7b756UL, 0x242070dbUL, 0xc1bdceeeUL,
0xf57c0fafUL, 0x4787c62aUL, 0xa8304613UL, 0xfd469501UL,
0x698098d8UL, 0x8b44f7afUL, 0xffff5bb1UL, 0x895cd7beUL,
@ -110,7 +101,6 @@ static const u32 k[] = {
0x655b59c3UL, 0x8f0ccc92UL, 0xffeff47dUL, 0x85845dd1UL,
0x6fa87e4fUL, 0xfe2ce6e0UL, 0xa3014314UL, 0x4e0811a1UL,
0xf7537e82UL, 0xbd3af235UL, 0x2ad7d2bbUL, 0xeb86d391UL,
0xe1f27f3aUL, 0xf5710fb0UL, 0xada0e5c4UL, 0x98e4c919UL
};
static void md5_transform(u32 *hash, const u32 *in)
@ -160,16 +150,15 @@ static inline void cpu_to_le32_array(u32 *buf, unsigned int words)
}
}
static inline void md5_transform_helper(struct md5_ctx *ctx)
static inline void md5_transform_helper(struct md5_context *ctx)
{
le32_to_cpu_array(ctx->block, sizeof(ctx->block) / sizeof(u32));
md5_transform(ctx->hash, ctx->block);
}
static void md5_init(void *context)
void md5_init ( struct md5_context *context )
{
struct md5_ctx *mctx = context;
struct md5_context *mctx = context;
mctx->hash[0] = 0x67452301;
mctx->hash[1] = 0xefcdab89;
mctx->hash[2] = 0x98badcfe;
@ -177,9 +166,9 @@ static void md5_init(void *context)
mctx->byte_count = 0;
}
static void md5_update(void *context, const void *data, size_t len)
void md5_update ( struct md5_context *context, const void *data, size_t len )
{
struct md5_ctx *mctx = context;
struct md5_context *mctx = context;
const u32 avail = sizeof(mctx->block) - (mctx->byte_count & 0x3f);
mctx->byte_count += len;
@ -207,9 +196,9 @@ static void md5_update(void *context, const void *data, size_t len)
memcpy(mctx->block, data, len);
}
static void md5_finish(void *context, void *out)
void md5_finish ( struct md5_context *context, struct md5_hash *out )
{
struct md5_ctx *mctx = context;
struct md5_context *mctx = context;
const unsigned int offset = mctx->byte_count & 0x3f;
char *p = (char *)mctx->block + offset;
int padding = 56 - (offset + 1);
@ -233,10 +222,12 @@ static void md5_finish(void *context, void *out)
memset(mctx, 0, sizeof(*mctx));
}
/*
struct digest_algorithm md5_algorithm = {
.context_len = sizeof ( struct md5_ctx ),
.context_len = sizeof ( struct md5_context ),
.digest_len = MD5_DIGEST_SIZE,
.init = md5_init,
.update = md5_update,
.finish = md5_finish,
};
*/

25
src/include/gpxe/md5.h Normal file
View File

@ -0,0 +1,25 @@
#ifndef _GPXE_MD5_H
#define _GPXE_MD5_H
#include <stdint.h>
#define MD5_DIGEST_SIZE 16
#define MD5_BLOCK_WORDS 16
#define MD5_HASH_WORDS 4
struct md5_context {
u32 hash[MD5_HASH_WORDS];
u32 block[MD5_BLOCK_WORDS];
u64 byte_count;
};
struct md5_hash {
u8 hash[MD5_DIGEST_SIZE];
};
extern void md5_init ( struct md5_context *context );
extern void md5_update ( struct md5_context *context, const void *data,
size_t len );
extern void md5_finish ( struct md5_context *context, struct md5_hash *hash );
#endif /* _GPXE_MD5_H */