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some more internall structure changes

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This commit is contained in:
Werner Koch 1998-06-16 15:13:28 +00:00
parent 6e1ca6b80f
commit e6ac5acbbf
39 changed files with 814 additions and 400 deletions
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55
cipher/md5.c
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@ -38,6 +38,15 @@
#include "memory.h"
typedef struct {
u32 A,B,C,D; /* chaining variables */
u32 total[2];
u32 buflen;
char buffer[128];
} MD5_CONTEXT;
#ifdef BIG_ENDIAN_HOST
#define SWAP(n) \
(((n) << 24) | (((n) & 0xff00) << 8) | (((n) >> 8) & 0xff00) | ((n) >> 24))
@ -49,7 +58,7 @@
64-byte boundary. (RFC 1321, 3.1: Step 1) */
static const unsigned char fillbuf[64] = { 0x80, 0 /* , 0, 0, ... */ };
void
static void
md5_init( MD5_CONTEXT *ctx )
{
ctx->A = 0x67452301;
@ -237,7 +246,7 @@ transform( MD5_CONTEXT *ctx, const void *buffer, size_t len )
* account for the presence of each of the characters inBuf[0..inLen-1]
* in the message whose digest is being computed.
*/
void
static void
md5_write( MD5_CONTEXT *ctx, const void *buffer, size_t len)
{
/* When we already have some bits in our internal buffer concatenate
@ -287,7 +296,7 @@ md5_write( MD5_CONTEXT *ctx, const void *buffer, size_t len)
* Returns 16 bytes representing the digest.
*/
void
static void
md5_final( MD5_CONTEXT *ctx )
{
/* Take yet unprocessed bytes into account. */
@ -317,6 +326,46 @@ md5_final( MD5_CONTEXT *ctx )
((u32 *)ctx->buffer)[3] = SWAP (ctx->D);
}
static byte *
md5_read( MD5_CONTEXT *hd )
{
return hd->buffer;
}
/****************
* Return some information about the algorithm. We need algo here to
* distinguish different flavors of the algorithm.
* Returns: A pointer to string describing the algorithm or NULL if
* the ALGO is invalid.
*/
const char *
md5_get_info( int algo, size_t *contextsize,
byte **r_asnoid, int *r_asnlen, int *r_mdlen,
void (**r_init)( void *c ),
void (**r_write)( void *c, byte *buf, size_t nbytes ),
void (**r_final)( void *c ),
byte *(**r_read)( void *c )
)
{
static byte asn[18] = /* Object ID is 1.2.840.113549.2.5 */
{ 0x30, 0x20, 0x30, 0x0c, 0x06, 0x08, 0x2a, 0x86,0x48,
0x86, 0xf7, 0x0d, 0x02, 0x05, 0x05, 0x00, 0x04, 0x10 };
if( algo != 1 )
return NULL;
*contextsize = sizeof(MD5_CONTEXT);
*r_asnoid = asn;
*r_asnlen = DIM(asn);
*r_mdlen = 16;
*r_init = (void (*)(void *))md5_init;
*r_write = (void (*)(void *, byte*, size_t))md5_write;
*r_final = (void (*)(void *))md5_final;
*r_read = (byte *(*)(void *))md5_read;
return "MD5";
}
/* end of file */