--- /dev/null
+/* crypto/hmac/hmac.c */
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ *
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to. The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code. The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ *
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * "This product includes cryptographic software written by
+ * Eric Young (eay@cryptsoft.com)"
+ * The word 'cryptographic' can be left out if the rouines from the library
+ * being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from
+ * the apps directory (application code) you must include an acknowledgement:
+ * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed. i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "hmac.h"
+
+void HMAC_Init(ctx,key,len,md)
+HMAC_CTX *ctx;
+unsigned char *key;
+int len;
+EVP_MD *md;
+ {
+ int i,j,reset=0;
+ unsigned char pad[HMAC_MAX_MD_CBLOCK];
+
+ if (md != NULL)
+ {
+ reset=1;
+ ctx->md=md;
+ }
+ else
+ md=ctx->md;
+
+ if (key != NULL)
+ {
+ reset=1;
+ j=EVP_MD_block_size(md);
+ if (j < len)
+ {
+ EVP_DigestInit(&ctx->md_ctx,md);
+ EVP_DigestUpdate(&ctx->md_ctx,key,len);
+ EVP_DigestFinal(&(ctx->md_ctx),ctx->key,
+ &ctx->key_length);
+ }
+ else
+ {
+ memcpy(ctx->key,key,len);
+ memset(&(ctx->key[len]),0,sizeof(ctx->key)-len);
+ ctx->key_length=len;
+ }
+ }
+
+ if (reset)
+ {
+ for (i=0; i<HMAC_MAX_MD_CBLOCK; i++)
+ pad[i]=0x36^ctx->key[i];
+ EVP_DigestInit(&ctx->i_ctx,md);
+ EVP_DigestUpdate(&ctx->i_ctx,pad,EVP_MD_block_size(md));
+
+ for (i=0; i<HMAC_MAX_MD_CBLOCK; i++)
+ pad[i]=0x5c^ctx->key[i];
+ EVP_DigestInit(&ctx->o_ctx,md);
+ EVP_DigestUpdate(&ctx->o_ctx,pad,EVP_MD_block_size(md));
+ }
+
+ memcpy(&ctx->md_ctx,&ctx->i_ctx,sizeof(ctx->i_ctx));
+ }
+
+void HMAC_Update(ctx,data,len)
+HMAC_CTX *ctx;
+unsigned char *data;
+int len;
+ {
+ EVP_DigestUpdate(&(ctx->md_ctx),data,len);
+ }
+
+void HMAC_Final(ctx,md,len)
+HMAC_CTX *ctx;
+unsigned char *md;
+unsigned int *len;
+ {
+ int j;
+ unsigned int i;
+ unsigned char buf[EVP_MAX_MD_SIZE];
+
+ j=EVP_MD_block_size(ctx->md);
+
+ EVP_DigestFinal(&(ctx->md_ctx),buf,&i);
+ memcpy(&(ctx->md_ctx),&(ctx->o_ctx),sizeof(ctx->o_ctx));
+ EVP_DigestUpdate(&(ctx->md_ctx),buf,i);
+ EVP_DigestFinal(&(ctx->md_ctx),md,len);
+ }
+
+void HMAC_cleanup(ctx)
+HMAC_CTX *ctx;
+ {
+ memset(ctx,0,sizeof(HMAC_CTX));
+ }
+
+unsigned char *HMAC(evp_md,key,key_len,d,n,md,md_len)
+EVP_MD *evp_md;
+unsigned char *key;
+int key_len;
+unsigned char *d;
+int n;
+unsigned char *md;
+unsigned int *md_len;
+ {
+ HMAC_CTX c;
+ static unsigned char m[EVP_MAX_MD_SIZE];
+
+ if (md == NULL) md=m;
+ HMAC_Init(&c,key,key_len,evp_md);
+ HMAC_Update(&c,d,n);
+ HMAC_Final(&c,md,md_len);
+ HMAC_cleanup(&c);
+ return(md);
+ }
+
projects / openssl.git / blobdiff