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/*----------------------------------------------------------------------------*/
/* Xymon monitor library. */
/* */
/* This is used to implement message digest functions (MD5, SHA1 etc.) */
/* */
/* Copyright (C) 2003-2011 Henrik Storner <henrik@hswn.dk> */
/* */
/* This program is released under the GNU General Public License (GPL), */
/* version 2. See the file "COPYING" for details. */
/* */
/*----------------------------------------------------------------------------*/
static char rcsid[] = "$Id: digest.c 8069 2019-07-23 15:29:06Z jccleaver $";
#include <sys/types.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "libxymon.h"
char *md5hash(char *input)
{
/* We have a fast MD5 hash function, since that may be used a lot */
static struct digestctx_t *ctx = NULL;
unsigned char md_value[16];
static char md_string[2*16+1];
int i;
char *p;
if (!ctx) {
ctx = (digestctx_t *) malloc(sizeof(digestctx_t));
ctx->digestname = strdup("md5");
ctx->digesttype = D_MD5;
ctx->mdctx = (void *)malloc(myMD5_Size());
}
myMD5_Init(ctx->mdctx);
myMD5_Update(ctx->mdctx, input, strlen(input));
myMD5_Final(md_value, ctx->mdctx);
for(i = 0, p = md_string; (i < sizeof(md_value)); i++)
p += snprintf(p, (sizeof(md_string) - (p - md_string)), "%02x", md_value[i]);
*p = '\0';
return md_string;
}
digestctx_t *digest_init(char *digest)
{
struct digestctx_t *ctx = NULL;
if (strcmp(digest, "md5") == 0) {
/* Use the built in MD5 routines */
ctx = (digestctx_t *) malloc(sizeof(digestctx_t));
ctx->digestname = strdup(digest);
ctx->digesttype = D_MD5;
ctx->mdctx = (void *)malloc(myMD5_Size());
myMD5_Init(ctx->mdctx);
}
else if (strcmp(digest, "sha1") == 0) {
/* Use the built in SHA1 routines */
ctx = (digestctx_t *) malloc(sizeof(digestctx_t));
ctx->digestname = strdup(digest);
ctx->digesttype = D_SHA1;
ctx->mdctx = (void *)malloc(mySHA1_Size());
mySHA1_Init(ctx->mdctx);
}
else if (strcmp(digest, "rmd160") == 0) {
/* Use the built in RMD160 routines */
ctx = (digestctx_t *) malloc(sizeof(digestctx_t));
ctx->digestname = strdup(digest);
ctx->digesttype = D_RMD160;
ctx->mdctx = (void *)malloc(myRIPEMD160_Size());
myRIPEMD160_Init(ctx->mdctx);
}
else if (strcmp(digest, "sha512") == 0) {
/* Use the built in SHA-512 routines */
ctx = (digestctx_t *) malloc(sizeof(digestctx_t));
ctx->digestname = strdup(digest);
ctx->digesttype = D_SHA512;
ctx->mdctx = (void *)malloc(mySHA512_Size());
mySHA512_Init(ctx->mdctx);
}
else if (strcmp(digest, "sha256") == 0) {
/* Use the built in SHA-256 routines */
ctx = (digestctx_t *) malloc(sizeof(digestctx_t));
ctx->digestname = strdup(digest);
ctx->digesttype = D_SHA256;
ctx->mdctx = (void *)malloc(mySHA256_Size());
mySHA256_Init(ctx->mdctx);
}
else if (strcmp(digest, "sha224") == 0) {
/* Use the built in SHA-224 routines */
ctx = (digestctx_t *) malloc(sizeof(digestctx_t));
ctx->digestname = strdup(digest);
ctx->digesttype = D_SHA224;
ctx->mdctx = (void *)malloc(mySHA224_Size());
mySHA224_Init(ctx->mdctx);
}
else if (strcmp(digest, "sha384") == 0) {
/* Use the built in SHA-384 routines */
ctx = (digestctx_t *) malloc(sizeof(digestctx_t));
ctx->digestname = strdup(digest);
ctx->digesttype = D_SHA384;
ctx->mdctx = (void *)malloc(mySHA384_Size());
mySHA384_Init(ctx->mdctx);
}
else {
errprintf("digest_init failure: Cannot handle digest %s\n", digest);
return NULL;
}
return ctx;
}
int digest_data(digestctx_t *ctx, unsigned char *buf, int buflen)
{
switch (ctx->digesttype) {
case D_MD5:
myMD5_Update(ctx->mdctx, buf, buflen);
break;
case D_SHA1:
mySHA1_Update(ctx->mdctx, buf, buflen);
break;
case D_RMD160:
myRIPEMD160_Update(ctx->mdctx, buf, buflen);
break;
case D_SHA512:
mySHA512_Update(ctx->mdctx, buf, buflen);
break;
case D_SHA256:
mySHA256_Update(ctx->mdctx, buf, buflen);
break;
case D_SHA384:
mySHA384_Update(ctx->mdctx, buf, buflen);
break;
case D_SHA224:
mySHA224_Update(ctx->mdctx, buf, buflen);
break;
}
return 0;
}
char *digest_done(digestctx_t *ctx)
{
unsigned int md_len = 0;
unsigned char *md_value = NULL;
SBUF_DEFINE(md_string);
int i;
char *p;
switch (ctx->digesttype) {
case D_MD5:
/* Built in MD5 hash */
md_len = 16;
md_value = (unsigned char *)malloc(md_len*sizeof(unsigned char));
SBUF_MALLOC(md_string, (2*md_len + strlen(ctx->digestname) + 2)*sizeof(char));
myMD5_Final(md_value, ctx->mdctx);
break;
case D_SHA1:
/* Built in SHA1 hash */
md_len = 20;
md_value = (unsigned char *)malloc(md_len*sizeof(unsigned char));
SBUF_MALLOC(md_string, (2*md_len + strlen(ctx->digestname) + 2)*sizeof(char));
mySHA1_Final(md_value, ctx->mdctx);
break;
case D_RMD160:
/* Built in RMD160 hash */
md_len = 20;
md_value = (unsigned char *)malloc(md_len*sizeof(unsigned char));
SBUF_MALLOC(md_string, (2*md_len + strlen(ctx->digestname) + 2)*sizeof(char));
myRIPEMD160_Final(md_value, ctx->mdctx);
break;
case D_SHA512:
/* Built in SHA-512 hash */
md_len = (512/8);
md_value = (unsigned char *)malloc(md_len*sizeof(unsigned char));
SBUF_MALLOC(md_string, (2*md_len + strlen(ctx->digestname) + 2)*sizeof(char));
mySHA512_Final(md_value, ctx->mdctx);
break;
case D_SHA256:
/* Built in SHA-256 hash */
md_len = (256/8);
md_value = (unsigned char *)malloc(md_len*sizeof(unsigned char));
SBUF_MALLOC(md_string, (2*md_len + strlen(ctx->digestname) + 2)*sizeof(char));
mySHA256_Final(md_value, ctx->mdctx);
break;
case D_SHA384:
/* Built in SHA-384 hash */
md_len = (384/8);
md_value = (unsigned char *)malloc(md_len*sizeof(unsigned char));
SBUF_MALLOC(md_string, (2*md_len + strlen(ctx->digestname) + 2)*sizeof(char));
mySHA384_Final(md_value, ctx->mdctx);
break;
case D_SHA224:
/* Built in SHA-224 hash */
md_len = (224/8);
md_value = (unsigned char *)malloc(md_len*sizeof(unsigned char));
SBUF_MALLOC(md_string, (2*md_len + strlen(ctx->digestname) + 2)*sizeof(char));
mySHA224_Final(md_value, ctx->mdctx);
break;
}
snprintf(md_string, md_string_buflen, "%s:", ctx->digestname);
for(i = 0, p = md_string + strlen(md_string); (i < md_len); i++) p += snprintf(p, (md_string_buflen - (p - md_string)), "%02x", md_value[i]);
*p = '\0';
xfree(md_value);
xfree(ctx->digestname);
xfree(ctx->mdctx);
xfree(ctx);
return md_string;
}
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