1 | /*
|
---|
2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
|
---|
3 | *
|
---|
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
|
---|
8 | */
|
---|
9 |
|
---|
10 | #include <stdio.h>
|
---|
11 | #include <time.h>
|
---|
12 |
|
---|
13 | #include "internal/cryptlib.h"
|
---|
14 |
|
---|
15 | #ifndef NO_SYS_TYPES_H
|
---|
16 | # include <sys/types.h>
|
---|
17 | #endif
|
---|
18 |
|
---|
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"
|
---|
26 |
|
---|
27 | #ifndef NO_ASN1_OLD
|
---|
28 |
|
---|
29 | int ASN1_verify(i2d_of_void *i2d, X509_ALGOR *a, ASN1_BIT_STRING *signature,
|
---|
30 | char *data, EVP_PKEY *pkey)
|
---|
31 | {
|
---|
32 | EVP_MD_CTX *ctx = EVP_MD_CTX_new();
|
---|
33 | const EVP_MD *type;
|
---|
34 | unsigned char *p, *buf_in = NULL;
|
---|
35 | int ret = -1, i, inl;
|
---|
36 |
|
---|
37 | if (ctx == NULL) {
|
---|
38 | ASN1err(ASN1_F_ASN1_VERIFY, ERR_R_MALLOC_FAILURE);
|
---|
39 | goto err;
|
---|
40 | }
|
---|
41 | i = OBJ_obj2nid(a->algorithm);
|
---|
42 | type = EVP_get_digestbyname(OBJ_nid2sn(i));
|
---|
43 | if (type == NULL) {
|
---|
44 | ASN1err(ASN1_F_ASN1_VERIFY, ASN1_R_UNKNOWN_MESSAGE_DIGEST_ALGORITHM);
|
---|
45 | goto err;
|
---|
46 | }
|
---|
47 |
|
---|
48 | if (signature->type == V_ASN1_BIT_STRING && signature->flags & 0x7) {
|
---|
49 | ASN1err(ASN1_F_ASN1_VERIFY, ASN1_R_INVALID_BIT_STRING_BITS_LEFT);
|
---|
50 | goto err;
|
---|
51 | }
|
---|
52 |
|
---|
53 | inl = i2d(data, NULL);
|
---|
54 | buf_in = OPENSSL_malloc((unsigned int)inl);
|
---|
55 | if (buf_in == NULL) {
|
---|
56 | ASN1err(ASN1_F_ASN1_VERIFY, ERR_R_MALLOC_FAILURE);
|
---|
57 | goto err;
|
---|
58 | }
|
---|
59 | p = buf_in;
|
---|
60 |
|
---|
61 | i2d(data, &p);
|
---|
62 | ret = EVP_VerifyInit_ex(ctx, type, NULL)
|
---|
63 | && EVP_VerifyUpdate(ctx, (unsigned char *)buf_in, inl);
|
---|
64 |
|
---|
65 | OPENSSL_clear_free(buf_in, (unsigned int)inl);
|
---|
66 |
|
---|
67 | if (!ret) {
|
---|
68 | ASN1err(ASN1_F_ASN1_VERIFY, ERR_R_EVP_LIB);
|
---|
69 | goto err;
|
---|
70 | }
|
---|
71 | ret = -1;
|
---|
72 |
|
---|
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);
|
---|
76 | ret = 0;
|
---|
77 | goto err;
|
---|
78 | }
|
---|
79 | ret = 1;
|
---|
80 | err:
|
---|
81 | EVP_MD_CTX_free(ctx);
|
---|
82 | return (ret);
|
---|
83 | }
|
---|
84 |
|
---|
85 | #endif
|
---|
86 |
|
---|
87 | int ASN1_item_verify(const ASN1_ITEM *it, X509_ALGOR *a,
|
---|
88 | ASN1_BIT_STRING *signature, void *asn, EVP_PKEY *pkey)
|
---|
89 | {
|
---|
90 | EVP_MD_CTX *ctx = NULL;
|
---|
91 | unsigned char *buf_in = NULL;
|
---|
92 | int ret = -1, inl;
|
---|
93 |
|
---|
94 | int mdnid, pknid;
|
---|
95 |
|
---|
96 | if (!pkey) {
|
---|
97 | ASN1err(ASN1_F_ASN1_ITEM_VERIFY, ERR_R_PASSED_NULL_PARAMETER);
|
---|
98 | return -1;
|
---|
99 | }
|
---|
100 |
|
---|
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);
|
---|
103 | return -1;
|
---|
104 | }
|
---|
105 |
|
---|
106 | ctx = EVP_MD_CTX_new();
|
---|
107 | if (ctx == NULL) {
|
---|
108 | ASN1err(ASN1_F_ASN1_ITEM_VERIFY, ERR_R_MALLOC_FAILURE);
|
---|
109 | goto err;
|
---|
110 | }
|
---|
111 |
|
---|
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);
|
---|
115 | goto err;
|
---|
116 | }
|
---|
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);
|
---|
121 | goto err;
|
---|
122 | }
|
---|
123 | ret = pkey->ameth->item_verify(ctx, it, asn, a, signature, pkey);
|
---|
124 | /*
|
---|
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.
|
---|
128 | */
|
---|
129 | if (ret != 2)
|
---|
130 | goto err;
|
---|
131 | ret = -1;
|
---|
132 | } else {
|
---|
133 | const EVP_MD *type;
|
---|
134 | type = EVP_get_digestbynid(mdnid);
|
---|
135 | if (type == NULL) {
|
---|
136 | ASN1err(ASN1_F_ASN1_ITEM_VERIFY,
|
---|
137 | ASN1_R_UNKNOWN_MESSAGE_DIGEST_ALGORITHM);
|
---|
138 | goto err;
|
---|
139 | }
|
---|
140 |
|
---|
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);
|
---|
144 | goto err;
|
---|
145 | }
|
---|
146 |
|
---|
147 | if (!EVP_DigestVerifyInit(ctx, NULL, type, NULL, pkey)) {
|
---|
148 | ASN1err(ASN1_F_ASN1_ITEM_VERIFY, ERR_R_EVP_LIB);
|
---|
149 | ret = 0;
|
---|
150 | goto err;
|
---|
151 | }
|
---|
152 |
|
---|
153 | }
|
---|
154 |
|
---|
155 | inl = ASN1_item_i2d(asn, &buf_in, it);
|
---|
156 |
|
---|
157 | if (buf_in == NULL) {
|
---|
158 | ASN1err(ASN1_F_ASN1_ITEM_VERIFY, ERR_R_MALLOC_FAILURE);
|
---|
159 | goto err;
|
---|
160 | }
|
---|
161 |
|
---|
162 | ret = EVP_DigestVerifyUpdate(ctx, buf_in, inl);
|
---|
163 |
|
---|
164 | OPENSSL_clear_free(buf_in, (unsigned int)inl);
|
---|
165 |
|
---|
166 | if (!ret) {
|
---|
167 | ASN1err(ASN1_F_ASN1_ITEM_VERIFY, ERR_R_EVP_LIB);
|
---|
168 | goto err;
|
---|
169 | }
|
---|
170 | ret = -1;
|
---|
171 |
|
---|
172 | if (EVP_DigestVerifyFinal(ctx, signature->data,
|
---|
173 | (size_t)signature->length) <= 0) {
|
---|
174 | ASN1err(ASN1_F_ASN1_ITEM_VERIFY, ERR_R_EVP_LIB);
|
---|
175 | ret = 0;
|
---|
176 | goto err;
|
---|
177 | }
|
---|
178 | ret = 1;
|
---|
179 | err:
|
---|
180 | EVP_MD_CTX_free(ctx);
|
---|
181 | return (ret);
|
---|
182 | }
|
---|