140 lines
3.5 KiB
C
140 lines
3.5 KiB
C
/* $Id$
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*****************************************************************************
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*
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* File: fko_digest.c
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*
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* Author: Damien S. Stuart
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*
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* Purpose: Create the base64-encoded digest for the current spa data. The
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* digest used is determined by the digest_type setting in the
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* fko context.
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*
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* Copyright (C) 2009 Damien Stuart (dstuart@dstuart.org)
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*
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* License (GNU Public License):
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* USA
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*
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*****************************************************************************
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*/
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#include "fko_common.h"
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#include "fko.h"
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#include "digest.h"
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/* Set the SPA digest type.
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*/
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int
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fko_set_spa_digest_type(fko_ctx_t ctx, short digest_type)
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{
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/* Must be initialized
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*/
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if(!CTX_INITIALIZED(ctx))
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return(FKO_ERROR_CTX_NOT_INITIALIZED);
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if(digest_type < 1 || digest_type >= FKO_LAST_DIGEST_TYPE)
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return(FKO_ERROR_INVALID_DATA);
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ctx->digest_type = digest_type;
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ctx->state |= FKO_DIGEST_TYPE_MODIFIED;
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return(FKO_SUCCESS);
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}
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/* Return the SPA digest type.
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*/
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int
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fko_get_spa_digest_type(fko_ctx_t ctx, short *digest_type)
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{
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/* Must be initialized
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*/
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if(!CTX_INITIALIZED(ctx))
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return(FKO_ERROR_CTX_NOT_INITIALIZED);
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*digest_type = ctx->digest_type;
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return(FKO_SUCCESS);
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}
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int
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fko_set_spa_digest(fko_ctx_t ctx)
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{
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char *md = NULL;
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/* Must be initialized
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*/
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if(!CTX_INITIALIZED(ctx))
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return(FKO_ERROR_CTX_NOT_INITIALIZED);
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/* Must have encoded message data to start with.
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*/
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if(ctx->encoded_msg == NULL)
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return(FKO_ERROR_MISSING_ENCODED_DATA);
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switch(ctx->digest_type)
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{
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case FKO_DIGEST_MD5:
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md = malloc(MD_HEX_SIZE(MD5_DIGESTSIZE)+1);
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if(md == NULL)
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return(FKO_ERROR_MEMORY_ALLOCATION);
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md5_base64(md,
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(unsigned char*)ctx->encoded_msg, strlen(ctx->encoded_msg));
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break;
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case FKO_DIGEST_SHA1:
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md = malloc(MD_HEX_SIZE(SHA1_DIGESTSIZE)+1);
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if(md == NULL)
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return(FKO_ERROR_MEMORY_ALLOCATION);
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sha1_base64(md,
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(unsigned char*)ctx->encoded_msg, strlen(ctx->encoded_msg));
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break;
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case FKO_DIGEST_SHA256:
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md = malloc(MD_HEX_SIZE(SHA256_DIGESTSIZE)+1);
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if(md == NULL)
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return(FKO_ERROR_MEMORY_ALLOCATION);
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sha256_base64(md,
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(unsigned char*)ctx->encoded_msg, strlen(ctx->encoded_msg));
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break;
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default:
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return(FKO_ERROR_INVALID_DIGEST_TYPE);
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}
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/* Just in case this is a subsquent call to this function. We
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* do not want to be leaking memory.
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*/
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if(ctx->digest != NULL)
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free(ctx->digest);
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ctx->digest = md;
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return(FKO_SUCCESS);
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}
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int
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fko_get_spa_digest(fko_ctx_t ctx, char **md)
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{
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/* Must be initialized
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*/
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if(!CTX_INITIALIZED(ctx))
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return(FKO_ERROR_CTX_NOT_INITIALIZED);
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*md = ctx->digest;
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return(FKO_SUCCESS);
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}
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/***EOF***/
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