--- /dev/null
+/* crypto/asn1/a_verify.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 <time.h>
+
+#include "cryptlib.h"
+#include "asn1_locl.h"
+
+#ifndef NO_SYS_TYPES_H
+# include <sys/types.h>
+#endif
+
+#include <openssl/bn.h>
+#include <openssl/x509.h>
+#include <openssl/objects.h>
+#include <openssl/buffer.h>
+#include <openssl/evp.h>
+
+#ifndef NO_ASN1_OLD
+
+int ASN1_verify(i2d_of_void *i2d, X509_ALGOR *a, ASN1_BIT_STRING *signature,
+ char *data, EVP_PKEY *pkey)
+ {
+ EVP_MD_CTX ctx;
+ const EVP_MD *type;
+ unsigned char *p,*buf_in=NULL;
+ int ret= -1,i,inl;
+
+ EVP_MD_CTX_init(&ctx);
+ i=OBJ_obj2nid(a->algorithm);
+ type=EVP_get_digestbyname(OBJ_nid2sn(i));
+ if (type == NULL)
+ {
+ ASN1err(ASN1_F_ASN1_VERIFY,ASN1_R_UNKNOWN_MESSAGE_DIGEST_ALGORITHM);
+ goto err;
+ }
+
+ inl=i2d(data,NULL);
+ buf_in=OPENSSL_malloc((unsigned int)inl);
+ if (buf_in == NULL)
+ {
+ ASN1err(ASN1_F_ASN1_VERIFY,ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ p=buf_in;
+
+ i2d(data,&p);
+ if (!EVP_VerifyInit_ex(&ctx,type, NULL)
+ || !EVP_VerifyUpdate(&ctx,(unsigned char *)buf_in,inl))
+ {
+ ASN1err(ASN1_F_ASN1_VERIFY,ERR_R_EVP_LIB);
+ ret=0;
+ goto err;
+ }
+
+ OPENSSL_cleanse(buf_in,(unsigned int)inl);
+ OPENSSL_free(buf_in);
+
+ if (EVP_VerifyFinal(&ctx,(unsigned char *)signature->data,
+ (unsigned int)signature->length,pkey) <= 0)
+ {
+ ASN1err(ASN1_F_ASN1_VERIFY,ERR_R_EVP_LIB);
+ ret=0;
+ goto err;
+ }
+ /* we don't need to zero the 'ctx' because we just checked
+ * public information */
+ /* memset(&ctx,0,sizeof(ctx)); */
+ ret=1;
+err:
+ EVP_MD_CTX_cleanup(&ctx);
+ return(ret);
+ }
+
+#endif
+
+
+int ASN1_item_verify(const ASN1_ITEM *it, X509_ALGOR *a,
+ ASN1_BIT_STRING *signature, void *asn, EVP_PKEY *pkey)
+ {
+ EVP_MD_CTX ctx;
+ unsigned char *buf_in=NULL;
+ int ret= -1,inl;
+
+ int mdnid, pknid;
+
+ if (!pkey)
+ {
+ ASN1err(ASN1_F_ASN1_ITEM_VERIFY, ERR_R_PASSED_NULL_PARAMETER);
+ return -1;
+ }
+
+ EVP_MD_CTX_init(&ctx);
+
+ /* Convert signature OID into digest and public key OIDs */
+ if (!OBJ_find_sigid_algs(OBJ_obj2nid(a->algorithm), &mdnid, &pknid))
+ {
+ ASN1err(ASN1_F_ASN1_ITEM_VERIFY,ASN1_R_UNKNOWN_SIGNATURE_ALGORITHM);
+ goto err;
+ }
+ if (mdnid == NID_undef)
+ {
+ if (!pkey->ameth || !pkey->ameth->item_verify)
+ {
+ ASN1err(ASN1_F_ASN1_ITEM_VERIFY,ASN1_R_UNKNOWN_SIGNATURE_ALGORITHM);
+ goto err;
+ }
+ ret = pkey->ameth->item_verify(&ctx, it, asn, a,
+ signature, pkey);
+ /* Return value of 2 means carry on, anything else means we
+ * exit straight away: either a fatal error of the underlying
+ * verification routine handles all verification.
+ */
+ if (ret != 2)
+ goto err;
+ ret = -1;
+ }
+ else
+ {
+ const EVP_MD *type;
+ type=EVP_get_digestbynid(mdnid);
+ if (type == NULL)
+ {
+ ASN1err(ASN1_F_ASN1_ITEM_VERIFY,ASN1_R_UNKNOWN_MESSAGE_DIGEST_ALGORITHM);
+ goto err;
+ }
+
+ /* Check public key OID matches public key type */
+ if (EVP_PKEY_type(pknid) != pkey->ameth->pkey_id)
+ {
+ ASN1err(ASN1_F_ASN1_ITEM_VERIFY,ASN1_R_WRONG_PUBLIC_KEY_TYPE);
+ goto err;
+ }
+
+ if (!EVP_DigestVerifyInit(&ctx, NULL, type, NULL, pkey))
+ {
+ ASN1err(ASN1_F_ASN1_ITEM_VERIFY,ERR_R_EVP_LIB);
+ ret=0;
+ goto err;
+ }
+
+ }
+
+ inl = ASN1_item_i2d(asn, &buf_in, it);
+
+ if (buf_in == NULL)
+ {
+ ASN1err(ASN1_F_ASN1_ITEM_VERIFY,ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ if (!EVP_DigestVerifyUpdate(&ctx,buf_in,inl))
+ {
+ ASN1err(ASN1_F_ASN1_ITEM_VERIFY,ERR_R_EVP_LIB);
+ ret=0;
+ goto err;
+ }
+
+ OPENSSL_cleanse(buf_in,(unsigned int)inl);
+ OPENSSL_free(buf_in);
+
+ if (EVP_DigestVerifyFinal(&ctx,signature->data,
+ (size_t)signature->length) <= 0)
+ {
+ ASN1err(ASN1_F_ASN1_ITEM_VERIFY,ERR_R_EVP_LIB);
+ ret=0;
+ goto err;
+ }
+ /* we don't need to zero the 'ctx' because we just checked
+ * public information */
+ /* memset(&ctx,0,sizeof(ctx)); */
+ ret=1;
+err:
+ EVP_MD_CTX_cleanup(&ctx);
+ return(ret);
+ }
+
+
projects / cassiopeia.git / blobdiff