2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
13 #include "internal/cryptlib.h"
15 #ifndef NO_SYS_TYPES_H
16 # include <sys/types.h>
19 #include <openssl/bn.h>
20 #include <openssl/x509.h>
21 #include <openssl/objects.h>
22 #include <openssl/buffer.h>
23 #include <openssl/evp.h>
24 #include "internal/asn1_int.h"
25 #include "internal/evp_int.h"
29 int ASN1_verify(i2d_of_void *i2d, X509_ALGOR *a, ASN1_BIT_STRING *signature,
30 char *data, EVP_PKEY *pkey)
32 EVP_MD_CTX *ctx = EVP_MD_CTX_new();
34 unsigned char *p, *buf_in = NULL;
38 ASN1err(ASN1_F_ASN1_VERIFY, ERR_R_MALLOC_FAILURE);
41 i = OBJ_obj2nid(a->algorithm);
42 type = EVP_get_digestbyname(OBJ_nid2sn(i));
44 ASN1err(ASN1_F_ASN1_VERIFY, ASN1_R_UNKNOWN_MESSAGE_DIGEST_ALGORITHM);
48 if (signature->type == V_ASN1_BIT_STRING && signature->flags & 0x7) {
49 ASN1err(ASN1_F_ASN1_VERIFY, ASN1_R_INVALID_BIT_STRING_BITS_LEFT);
53 inl = i2d(data, NULL);
54 buf_in = OPENSSL_malloc((unsigned int)inl);
56 ASN1err(ASN1_F_ASN1_VERIFY, ERR_R_MALLOC_FAILURE);
62 ret = EVP_VerifyInit_ex(ctx, type, NULL)
63 && EVP_VerifyUpdate(ctx, (unsigned char *)buf_in, inl);
65 OPENSSL_clear_free(buf_in, (unsigned int)inl);
68 ASN1err(ASN1_F_ASN1_VERIFY, ERR_R_EVP_LIB);
73 if (EVP_VerifyFinal(ctx, (unsigned char *)signature->data,
74 (unsigned int)signature->length, pkey) <= 0) {
75 ASN1err(ASN1_F_ASN1_VERIFY, ERR_R_EVP_LIB);
87 int ASN1_item_verify(const ASN1_ITEM *it, X509_ALGOR *a,
88 ASN1_BIT_STRING *signature, void *asn, EVP_PKEY *pkey)
90 EVP_MD_CTX *ctx = NULL;
91 unsigned char *buf_in = NULL;
97 ASN1err(ASN1_F_ASN1_ITEM_VERIFY, ERR_R_PASSED_NULL_PARAMETER);
101 if (signature->type == V_ASN1_BIT_STRING && signature->flags & 0x7) {
102 ASN1err(ASN1_F_ASN1_ITEM_VERIFY, ASN1_R_INVALID_BIT_STRING_BITS_LEFT);
106 ctx = EVP_MD_CTX_new();
108 ASN1err(ASN1_F_ASN1_ITEM_VERIFY, ERR_R_MALLOC_FAILURE);
112 /* Convert signature OID into digest and public key OIDs */
113 if (!OBJ_find_sigid_algs(OBJ_obj2nid(a->algorithm), &mdnid, &pknid)) {
114 ASN1err(ASN1_F_ASN1_ITEM_VERIFY, ASN1_R_UNKNOWN_SIGNATURE_ALGORITHM);
117 if (mdnid == NID_undef) {
118 if (!pkey->ameth || !pkey->ameth->item_verify) {
119 ASN1err(ASN1_F_ASN1_ITEM_VERIFY,
120 ASN1_R_UNKNOWN_SIGNATURE_ALGORITHM);
123 ret = pkey->ameth->item_verify(ctx, it, asn, a, signature, pkey);
125 * Return value of 2 means carry on, anything else means we exit
126 * straight away: either a fatal error of the underlying verification
127 * routine handles all verification.
134 type = EVP_get_digestbynid(mdnid);
136 ASN1err(ASN1_F_ASN1_ITEM_VERIFY,
137 ASN1_R_UNKNOWN_MESSAGE_DIGEST_ALGORITHM);
141 /* Check public key OID matches public key type */
142 if (EVP_PKEY_type(pknid) != pkey->ameth->pkey_id) {
143 ASN1err(ASN1_F_ASN1_ITEM_VERIFY, ASN1_R_WRONG_PUBLIC_KEY_TYPE);
147 if (!EVP_DigestVerifyInit(ctx, NULL, type, NULL, pkey)) {
148 ASN1err(ASN1_F_ASN1_ITEM_VERIFY, ERR_R_EVP_LIB);
155 inl = ASN1_item_i2d(asn, &buf_in, it);
157 if (buf_in == NULL) {
158 ASN1err(ASN1_F_ASN1_ITEM_VERIFY, ERR_R_MALLOC_FAILURE);
162 ret = EVP_DigestVerifyUpdate(ctx, buf_in, inl);
164 OPENSSL_clear_free(buf_in, (unsigned int)inl);
167 ASN1err(ASN1_F_ASN1_ITEM_VERIFY, ERR_R_EVP_LIB);
172 if (EVP_DigestVerifyFinal(ctx, signature->data,
173 (size_t)signature->length) <= 0) {
174 ASN1err(ASN1_F_ASN1_ITEM_VERIFY, ERR_R_EVP_LIB);
180 EVP_MD_CTX_free(ctx);