2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (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
12 #include <sys/types.h>
14 #include "internal/cryptlib.h"
16 #include <openssl/bn.h>
17 #include <openssl/x509.h>
18 #include <openssl/objects.h>
19 #include <openssl/buffer.h>
20 #include <openssl/evp.h>
21 #include "crypto/asn1.h"
22 #include "crypto/evp.h"
24 #ifndef OPENSSL_NO_DEPRECATED_3_0
26 int ASN1_verify(i2d_of_void *i2d, X509_ALGOR *a, ASN1_BIT_STRING *signature,
27 char *data, EVP_PKEY *pkey)
29 EVP_MD_CTX *ctx = EVP_MD_CTX_new();
31 unsigned char *p, *buf_in = NULL;
35 ASN1err(ASN1_F_ASN1_VERIFY, ERR_R_MALLOC_FAILURE);
38 i = OBJ_obj2nid(a->algorithm);
39 type = EVP_get_digestbyname(OBJ_nid2sn(i));
41 ASN1err(ASN1_F_ASN1_VERIFY, ASN1_R_UNKNOWN_MESSAGE_DIGEST_ALGORITHM);
45 if (signature->type == V_ASN1_BIT_STRING && signature->flags & 0x7) {
46 ASN1err(ASN1_F_ASN1_VERIFY, ASN1_R_INVALID_BIT_STRING_BITS_LEFT);
50 inl = i2d(data, NULL);
52 ASN1err(ASN1_F_ASN1_VERIFY, ERR_R_INTERNAL_ERROR);
55 buf_in = OPENSSL_malloc((unsigned int)inl);
57 ASN1err(ASN1_F_ASN1_VERIFY, ERR_R_MALLOC_FAILURE);
63 ret = EVP_VerifyInit_ex(ctx, type, NULL)
64 && EVP_VerifyUpdate(ctx, (unsigned char *)buf_in, inl);
66 OPENSSL_clear_free(buf_in, (unsigned int)inl);
69 ASN1err(ASN1_F_ASN1_VERIFY, ERR_R_EVP_LIB);
74 if (EVP_VerifyFinal(ctx, (unsigned char *)signature->data,
75 (unsigned int)signature->length, pkey) <= 0) {
76 ASN1err(ASN1_F_ASN1_VERIFY, ERR_R_EVP_LIB);
88 int ASN1_item_verify(const ASN1_ITEM *it, X509_ALGOR *a,
89 ASN1_BIT_STRING *signature, void *asn, EVP_PKEY *pkey)
92 EVP_MD_CTX *ctx = EVP_MD_CTX_new();
93 EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new(pkey, NULL);
95 if (ctx == NULL || pctx == NULL) {
96 ASN1err(0, ERR_R_MALLOC_FAILURE);
100 EVP_MD_CTX_set_pkey_ctx(ctx, pctx);
102 rv = ASN1_item_verify_ctx(it, a, signature, asn, ctx);
105 EVP_PKEY_CTX_free(pctx);
106 EVP_MD_CTX_free(ctx);
110 int ASN1_item_verify_ctx(const ASN1_ITEM *it, X509_ALGOR *a,
111 ASN1_BIT_STRING *signature, void *asn,
115 unsigned char *buf_in = NULL;
116 int ret = -1, inl = 0;
120 pkey = EVP_PKEY_CTX_get0_pkey(EVP_MD_CTX_pkey_ctx(ctx));
123 ASN1err(0, ERR_R_PASSED_NULL_PARAMETER);
127 if (signature->type == V_ASN1_BIT_STRING && signature->flags & 0x7) {
128 ASN1err(0, ASN1_R_INVALID_BIT_STRING_BITS_LEFT);
132 /* Convert signature OID into digest and public key OIDs */
133 if (!OBJ_find_sigid_algs(OBJ_obj2nid(a->algorithm), &mdnid, &pknid)) {
134 ASN1err(0, ASN1_R_UNKNOWN_SIGNATURE_ALGORITHM);
138 if (mdnid == NID_undef) {
139 if (pkey->ameth == NULL || pkey->ameth->item_verify == NULL) {
140 ASN1err(0, ASN1_R_UNKNOWN_SIGNATURE_ALGORITHM);
143 ret = pkey->ameth->item_verify(ctx, it, asn, a, signature, pkey);
145 * Return values meaning:
147 * 1: method does everything.
148 * 2: carry on as normal, method has called EVP_DigestVerifyInit()
151 ASN1err(0, ERR_R_EVP_LIB);
155 const EVP_MD *type = EVP_get_digestbynid(mdnid);
158 ASN1err(0, ASN1_R_UNKNOWN_MESSAGE_DIGEST_ALGORITHM);
162 /* Check public key OID matches public key type */
163 if (EVP_PKEY_type(pknid) != pkey->ameth->pkey_id) {
164 ASN1err(0, ASN1_R_WRONG_PUBLIC_KEY_TYPE);
168 if (!EVP_DigestVerifyInit(ctx, NULL, type, NULL, pkey)) {
169 ASN1err(0, ERR_R_EVP_LIB);
175 inl = ASN1_item_i2d(asn, &buf_in, it);
177 ASN1err(0, ERR_R_INTERNAL_ERROR);
180 if (buf_in == NULL) {
181 ASN1err(0, ERR_R_MALLOC_FAILURE);
186 ret = EVP_DigestVerify(ctx, signature->data, (size_t)signature->length,
189 ASN1err(0, ERR_R_EVP_LIB);
194 OPENSSL_clear_free(buf_in, inll);