-/* crypto/dsa/dsa_asn1.c */
+/* dsa_asn1.c */
+/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
+ * project 2000.
+ */
+/* ====================================================================
+ * Copyright (c) 2000-2005 The OpenSSL Project. All rights reserved.
+ *
+ * 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 above 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 acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For written permission, please contact
+ * licensing@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ * nor may "OpenSSL" appear in their names without prior written
+ * permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED 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 OpenSSL PROJECT OR
+ * ITS 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.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com). This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
#include <stdio.h>
#include "cryptlib.h"
#include <openssl/dsa.h>
#include <openssl/asn1.h>
-#include <openssl/asn1_mac.h>
+#include <openssl/asn1t.h>
+#include <openssl/rand.h>
-DSA_SIG *DSA_SIG_new(void)
+/* Override the default new methods */
+static int sig_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
+ void *exarg)
{
- DSA_SIG *ret;
-
- ret = OPENSSL_malloc(sizeof(DSA_SIG));
- if (ret == NULL)
- {
- DSAerr(DSA_F_DSA_SIG_NEW,ERR_R_MALLOC_FAILURE);
- return(NULL);
- }
- ret->r = NULL;
- ret->s = NULL;
- return(ret);
+ if(operation == ASN1_OP_NEW_PRE) {
+ DSA_SIG *sig;
+ sig = OPENSSL_malloc(sizeof(DSA_SIG));
+ if (!sig)
+ {
+ DSAerr(DSA_F_SIG_CB, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+ sig->r = NULL;
+ sig->s = NULL;
+ *pval = (ASN1_VALUE *)sig;
+ return 2;
+ }
+ return 1;
}
-void DSA_SIG_free(DSA_SIG *r)
+ASN1_SEQUENCE_cb(DSA_SIG, sig_cb) = {
+ ASN1_SIMPLE(DSA_SIG, r, CBIGNUM),
+ ASN1_SIMPLE(DSA_SIG, s, CBIGNUM)
+} ASN1_SEQUENCE_END_cb(DSA_SIG, DSA_SIG)
+
+IMPLEMENT_ASN1_FUNCTIONS_const(DSA_SIG)
+
+/* Override the default free and new methods */
+static int dsa_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
+ void *exarg)
{
- if (r == NULL) return;
- if (r->r) BN_clear_free(r->r);
- if (r->s) BN_clear_free(r->s);
- OPENSSL_free(r);
+ if(operation == ASN1_OP_NEW_PRE) {
+ *pval = (ASN1_VALUE *)DSA_new();
+ if(*pval) return 2;
+ return 0;
+ } else if(operation == ASN1_OP_FREE_PRE) {
+ DSA_free((DSA *)*pval);
+ *pval = NULL;
+ return 2;
+ }
+ return 1;
}
-int i2d_DSA_SIG(const DSA_SIG *v, unsigned char **pp)
-{
- int t=0,len;
- ASN1_INTEGER rbs,sbs;
- unsigned char *p;
+ASN1_SEQUENCE_cb(DSAPrivateKey, dsa_cb) = {
+ ASN1_SIMPLE(DSA, version, LONG),
+ ASN1_SIMPLE(DSA, p, BIGNUM),
+ ASN1_SIMPLE(DSA, q, BIGNUM),
+ ASN1_SIMPLE(DSA, g, BIGNUM),
+ ASN1_SIMPLE(DSA, pub_key, BIGNUM),
+ ASN1_SIMPLE(DSA, priv_key, BIGNUM)
+} ASN1_SEQUENCE_END_cb(DSA, DSAPrivateKey)
- rbs.data=OPENSSL_malloc(BN_num_bits(v->r)/8+1);
- if (rbs.data == NULL)
- {
- DSAerr(DSA_F_I2D_DSA_SIG, ERR_R_MALLOC_FAILURE);
- return(0);
- }
- rbs.type=V_ASN1_INTEGER;
- rbs.length=BN_bn2bin(v->r,rbs.data);
- sbs.data=OPENSSL_malloc(BN_num_bits(v->s)/8+1);
- if (sbs.data == NULL)
- {
- OPENSSL_free(rbs.data);
- DSAerr(DSA_F_I2D_DSA_SIG, ERR_R_MALLOC_FAILURE);
- return(0);
- }
- sbs.type=V_ASN1_INTEGER;
- sbs.length=BN_bn2bin(v->s,sbs.data);
+IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(DSA, DSAPrivateKey, DSAPrivateKey)
- len=i2d_ASN1_INTEGER(&rbs,NULL);
- len+=i2d_ASN1_INTEGER(&sbs,NULL);
+ASN1_SEQUENCE_cb(DSAparams, dsa_cb) = {
+ ASN1_SIMPLE(DSA, p, BIGNUM),
+ ASN1_SIMPLE(DSA, q, BIGNUM),
+ ASN1_SIMPLE(DSA, g, BIGNUM),
+} ASN1_SEQUENCE_END_cb(DSA, DSAparams)
- if (pp)
+IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(DSA, DSAparams, DSAparams)
+
+/* DSA public key is a bit trickier... its effectively a CHOICE type
+ * decided by a field called write_params which can either write out
+ * just the public key as an INTEGER or the parameters and public key
+ * in a SEQUENCE
+ */
+
+ASN1_SEQUENCE(dsa_pub_internal) = {
+ ASN1_SIMPLE(DSA, pub_key, BIGNUM),
+ ASN1_SIMPLE(DSA, p, BIGNUM),
+ ASN1_SIMPLE(DSA, q, BIGNUM),
+ ASN1_SIMPLE(DSA, g, BIGNUM)
+} ASN1_SEQUENCE_END_name(DSA, dsa_pub_internal)
+
+ASN1_CHOICE_cb(DSAPublicKey, dsa_cb) = {
+ ASN1_SIMPLE(DSA, pub_key, BIGNUM),
+ ASN1_EX_COMBINE(0, 0, dsa_pub_internal)
+} ASN1_CHOICE_END_cb(DSA, DSAPublicKey, write_params)
+
+IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(DSA, DSAPublicKey, DSAPublicKey)
+
+DSA *DSAparams_dup(DSA *dsa)
+ {
+ return ASN1_item_dup(ASN1_ITEM_rptr(DSAparams), dsa);
+ }
+
+int DSA_sign(int type, const unsigned char *dgst, int dlen, unsigned char *sig,
+ unsigned int *siglen, DSA *dsa)
+ {
+ DSA_SIG *s;
+ RAND_seed(dgst, dlen);
+ s=DSA_do_sign(dgst,dlen,dsa);
+ if (s == NULL)
{
- p=*pp;
- ASN1_put_object(&p,1,len,V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL);
- i2d_ASN1_INTEGER(&rbs,&p);
- i2d_ASN1_INTEGER(&sbs,&p);
+ *siglen=0;
+ return(0);
}
- t=ASN1_object_size(1,len,V_ASN1_SEQUENCE);
- OPENSSL_free(rbs.data);
- OPENSSL_free(sbs.data);
- return(t);
-}
+ *siglen=i2d_DSA_SIG(s,&sig);
+ DSA_SIG_free(s);
+ return(1);
+ }
-DSA_SIG *d2i_DSA_SIG(DSA_SIG **a, const unsigned char **pp, long length)
-{
- int i=ERR_R_NESTED_ASN1_ERROR;
- ASN1_INTEGER *bs=NULL;
- M_ASN1_D2I_vars(a,DSA_SIG *,DSA_SIG_new);
-
- M_ASN1_D2I_Init();
- M_ASN1_D2I_start_sequence();
- M_ASN1_D2I_get(bs,d2i_ASN1_INTEGER);
- if ((ret->r=BN_bin2bn(bs->data,bs->length,ret->r)) == NULL)
- goto err_bn;
- M_ASN1_D2I_get(bs,d2i_ASN1_INTEGER);
- if ((ret->s=BN_bin2bn(bs->data,bs->length,ret->s)) == NULL)
- goto err_bn;
- M_ASN1_BIT_STRING_free(bs);
- M_ASN1_D2I_Finish_2(a);
-
-err_bn:
- i=ERR_R_BN_LIB;
+/* data has already been hashed (probably with SHA or SHA-1). */
+/*-
+ * returns
+ * 1: correct signature
+ * 0: incorrect signature
+ * -1: error
+ */
+int DSA_verify(int type, const unsigned char *dgst, int dgst_len,
+ const unsigned char *sigbuf, int siglen, DSA *dsa)
+ {
+ DSA_SIG *s;
+ int ret=-1;
+
+ s = DSA_SIG_new();
+ if (s == NULL) return(ret);
+ if (d2i_DSA_SIG(&s,&sigbuf,siglen) == NULL) goto err;
+ ret=DSA_do_verify(dgst,dgst_len,s,dsa);
err:
- DSAerr(DSA_F_D2I_DSA_SIG,i);
- if ((ret != NULL) && ((a == NULL) || (*a != ret))) DSA_SIG_free(ret);
- if (bs != NULL) M_ASN1_BIT_STRING_free(bs);
- return(NULL);
-}
+ DSA_SIG_free(s);
+ return(ret);
+ }
projects / openssl.git / blobdiff