/src/openssl30/crypto/asn1/a_verify.c

Source (jump to first uncovered line)
/*
 * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the Apache License 2.0 (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

#include <stdio.h>
#include <time.h>
#include <sys/types.h>

#include "internal/cryptlib.h"

#include <openssl/bn.h>
#include <openssl/x509.h>
#include <openssl/objects.h>
#include <openssl/buffer.h>
#include <openssl/evp.h>
#include "crypto/asn1.h"
#include "crypto/evp.h"
#include "crypto/rsa.h"

#ifndef OPENSSL_NO_DEPRECATED_3_0

int ASN1_verify(i2d_of_void *i2d, X509_ALGOR *a, ASN1_BIT_STRING *signature,
                char *data, EVP_PKEY *pkey)
{
    EVP_MD_CTX *ctx = EVP_MD_CTX_new();
    const EVP_MD *type;
    unsigned char *p, *buf_in = NULL;
    int ret = -1, i, inl;

    if (ctx == NULL) {
        ERR_raise(ERR_LIB_ASN1, ERR_R_MALLOC_FAILURE);
        goto err;
    }
    i = OBJ_obj2nid(a->algorithm);
    type = EVP_get_digestbyname(OBJ_nid2sn(i));
    if (type == NULL) {
        ERR_raise(ERR_LIB_ASN1, ASN1_R_UNKNOWN_MESSAGE_DIGEST_ALGORITHM);
        goto err;
    }

    if (signature->type == V_ASN1_BIT_STRING && signature->flags & 0x7) {
        ERR_raise(ERR_LIB_ASN1, ASN1_R_INVALID_BIT_STRING_BITS_LEFT);
        goto err;
    }

    inl = i2d(data, NULL);
    if (inl <= 0) {
        ERR_raise(ERR_LIB_ASN1, ERR_R_INTERNAL_ERROR);
        goto err;
    }
    buf_in = OPENSSL_malloc((unsigned int)inl);
    if (buf_in == NULL) {
        ERR_raise(ERR_LIB_ASN1, ERR_R_MALLOC_FAILURE);
        goto err;
    }
    p = buf_in;

    i2d(data, &p);
    ret = EVP_VerifyInit_ex(ctx, type, NULL)
        && EVP_VerifyUpdate(ctx, (unsigned char *)buf_in, inl);

    OPENSSL_clear_free(buf_in, (unsigned int)inl);

    if (!ret) {
        ERR_raise(ERR_LIB_ASN1, ERR_R_EVP_LIB);
        goto err;
    }
    ret = -1;

    if (EVP_VerifyFinal(ctx, (unsigned char *)signature->data,
                        (unsigned int)signature->length, pkey) <= 0) {
        ERR_raise(ERR_LIB_ASN1, ERR_R_EVP_LIB);
        ret = 0;
        goto err;
    }
    ret = 1;
 err:
    EVP_MD_CTX_free(ctx);
    return ret;
}

#endif

int ASN1_item_verify(const ASN1_ITEM *it, const X509_ALGOR *alg,
                     const ASN1_BIT_STRING *signature, const void *data,
                     EVP_PKEY *pkey)
{
    return ASN1_item_verify_ex(it, alg, signature, data, NULL, pkey, NULL, NULL);
}

int ASN1_item_verify_ex(const ASN1_ITEM *it, const X509_ALGOR *alg,
                        const ASN1_BIT_STRING *signature, const void *data,
                        const ASN1_OCTET_STRING *id, EVP_PKEY *pkey,
                        OSSL_LIB_CTX *libctx, const char *propq)
{
    EVP_MD_CTX *ctx;
    int rv = -1;

    if ((ctx = evp_md_ctx_new_ex(pkey, id, libctx, propq)) != NULL) {
        rv = ASN1_item_verify_ctx(it, alg, signature, data, ctx);
        EVP_PKEY_CTX_free(EVP_MD_CTX_get_pkey_ctx(ctx));
        EVP_MD_CTX_free(ctx);
    }
    return rv;
}

int ASN1_item_verify_ctx(const ASN1_ITEM *it, const X509_ALGOR *alg,
                         const ASN1_BIT_STRING *signature, const void *data,
                         EVP_MD_CTX *ctx)
{
    EVP_PKEY *pkey;
    unsigned char *buf_in = NULL;
    int ret = -1, inl = 0;
    int mdnid, pknid;
    size_t inll = 0;

    pkey = EVP_PKEY_CTX_get0_pkey(EVP_MD_CTX_get_pkey_ctx(ctx));

    if (pkey == NULL) {
        ERR_raise(ERR_LIB_ASN1, ERR_R_PASSED_NULL_PARAMETER);
        return -1;
    }

    if (signature->type == V_ASN1_BIT_STRING && signature->flags & 0x7) {
        ERR_raise(ERR_LIB_ASN1, ASN1_R_INVALID_BIT_STRING_BITS_LEFT);
        return -1;
    }

    /* Convert signature OID into digest and public key OIDs */
    if (!OBJ_find_sigid_algs(OBJ_obj2nid(alg->algorithm), &mdnid, &pknid)) {
        ERR_raise(ERR_LIB_ASN1, ASN1_R_UNKNOWN_SIGNATURE_ALGORITHM);
        goto err;
    }

    if (mdnid == NID_undef && evp_pkey_is_legacy(pkey)) {
        if (pkey->ameth == NULL || pkey->ameth->item_verify == NULL) {
            ERR_raise(ERR_LIB_ASN1, ASN1_R_UNKNOWN_SIGNATURE_ALGORITHM);
            goto err;
        }
        ret = pkey->ameth->item_verify(ctx, it, data, alg, signature, pkey);
        /*
         * Return values meaning:
         * <=0: error.
         *   1: method does everything.
         *   2: carry on as normal, method has called EVP_DigestVerifyInit()
         */
        if (ret <= 0)
            ERR_raise(ERR_LIB_ASN1, ERR_R_EVP_LIB);
        if (ret <= 1)
            goto err;
    } else {
        const EVP_MD *type = NULL;

        /*
         * We don't yet have the ability for providers to be able to handle
         * X509_ALGOR style parameters. Fortunately the only one that needs this
         * so far is RSA-PSS, so we just special case this for now. In some
         * future version of OpenSSL we should push this to the provider.
         */
        if (mdnid == NID_undef && pknid == EVP_PKEY_RSA_PSS) {
            if (!EVP_PKEY_is_a(pkey, "RSA") && !EVP_PKEY_is_a(pkey, "RSA-PSS")) {
                ERR_raise(ERR_LIB_ASN1, ASN1_R_WRONG_PUBLIC_KEY_TYPE);
                goto err;
            }
            /* This function also calls EVP_DigestVerifyInit */
            if (ossl_rsa_pss_to_ctx(ctx, NULL, alg, pkey) <= 0) {
                ERR_raise(ERR_LIB_ASN1, ERR_R_INTERNAL_ERROR);
                goto err;
            }
        } else {
            /* Check public key OID matches public key type */
            if (!EVP_PKEY_is_a(pkey, OBJ_nid2sn(pknid))) {
                ERR_raise(ERR_LIB_ASN1, ASN1_R_WRONG_PUBLIC_KEY_TYPE);
                goto err;
            }

            if (mdnid != NID_undef) {
                type = EVP_get_digestbynid(mdnid);
                if (type == NULL) {
                    ERR_raise(ERR_LIB_ASN1,
                              ASN1_R_UNKNOWN_MESSAGE_DIGEST_ALGORITHM);
                    goto err;
                }
            }

            /*
             * Note that some algorithms (notably Ed25519 and Ed448) may allow
             * a NULL digest value.
             */
            if (!EVP_DigestVerifyInit(ctx, NULL, type, NULL, pkey)) {
                ERR_raise(ERR_LIB_ASN1, ERR_R_EVP_LIB);
                ret = 0;
                goto err;
            }
        }
    }

    inl = ASN1_item_i2d(data, &buf_in, it);
    if (inl <= 0) {
        ERR_raise(ERR_LIB_ASN1, ERR_R_INTERNAL_ERROR);
        goto err;
    }
    if (buf_in == NULL) {
        ERR_raise(ERR_LIB_ASN1, ERR_R_MALLOC_FAILURE);
        goto err;
    }
    inll = inl;

    ret = EVP_DigestVerify(ctx, signature->data, (size_t)signature->length,
                           buf_in, inl);
    if (ret <= 0) {
        ERR_raise(ERR_LIB_ASN1, ERR_R_EVP_LIB);
        goto err;
    }
    ret = 1;
 err:
    OPENSSL_clear_free(buf_in, inll);
    return ret;
}

Coverage Report

Created: 2023-06-08 06:41

Line	Count	Source (jump to first uncovered line)
1		/*
2		* Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
3		*
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
8		*/
9
10		#include <stdio.h>
11		#include <time.h>
12		#include <sys/types.h>
13
14		#include "internal/cryptlib.h"
15
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"
23		#include "crypto/rsa.h"
24
25		#ifndef OPENSSL_NO_DEPRECATED_3_0
26
27		int ASN1_verify(i2d_of_void i2d, X509_ALGOR a, ASN1_BIT_STRING *signature,
28		char data, EVP_PKEY pkey)
29	0	{
30	0	EVP_MD_CTX *ctx = EVP_MD_CTX_new();
31	0	const EVP_MD *type;
32	0	unsigned char p, buf_in = NULL;
33	0	int ret = -1, i, inl;
34
35	0	if (ctx == NULL) {
36	0	ERR_raise(ERR_LIB_ASN1, ERR_R_MALLOC_FAILURE);
37	0	goto err;
38	0	}
39	0	i = OBJ_obj2nid(a->algorithm);
40	0	type = EVP_get_digestbyname(OBJ_nid2sn(i));
41	0	if (type == NULL) {
42	0	ERR_raise(ERR_LIB_ASN1, ASN1_R_UNKNOWN_MESSAGE_DIGEST_ALGORITHM);
43	0	goto err;
44	0	}
45
46	0	if (signature->type == V_ASN1_BIT_STRING && signature->flags & 0x7) {
47	0	ERR_raise(ERR_LIB_ASN1, ASN1_R_INVALID_BIT_STRING_BITS_LEFT);
48	0	goto err;
49	0	}
50
51	0	inl = i2d(data, NULL);
52	0	if (inl <= 0) {
53	0	ERR_raise(ERR_LIB_ASN1, ERR_R_INTERNAL_ERROR);
54	0	goto err;
55	0	}
56	0	buf_in = OPENSSL_malloc((unsigned int)inl);
57	0	if (buf_in == NULL) {
58	0	ERR_raise(ERR_LIB_ASN1, ERR_R_MALLOC_FAILURE);
59	0	goto err;
60	0	}
61	0	p = buf_in;
62
63	0	i2d(data, &p);
64	0	ret = EVP_VerifyInit_ex(ctx, type, NULL)
65	0	&& EVP_VerifyUpdate(ctx, (unsigned char *)buf_in, inl);
66
67	0	OPENSSL_clear_free(buf_in, (unsigned int)inl);
68
69	0	if (!ret) {
70	0	ERR_raise(ERR_LIB_ASN1, ERR_R_EVP_LIB);
71	0	goto err;
72	0	}
73	0	ret = -1;
74
75	0	if (EVP_VerifyFinal(ctx, (unsigned char *)signature->data,
76	0	(unsigned int)signature->length, pkey) <= 0) {
77	0	ERR_raise(ERR_LIB_ASN1, ERR_R_EVP_LIB);
78	0	ret = 0;
79	0	goto err;
80	0	}
81	0	ret = 1;
82	0	err:
83	0	EVP_MD_CTX_free(ctx);
84	0	return ret;
85	0	}
86
87		#endif
88
89		int ASN1_item_verify(const ASN1_ITEM it, const X509_ALGOR alg,
90		const ASN1_BIT_STRING signature, const void data,
91		EVP_PKEY *pkey)
92	0	{
93	0	return ASN1_item_verify_ex(it, alg, signature, data, NULL, pkey, NULL, NULL);
94	0	}
95
96		int ASN1_item_verify_ex(const ASN1_ITEM it, const X509_ALGOR alg,
97		const ASN1_BIT_STRING signature, const void data,
98		const ASN1_OCTET_STRING id, EVP_PKEY pkey,
99		OSSL_LIB_CTX libctx, const char propq)
100	950	{
101	950	EVP_MD_CTX *ctx;
102	950	int rv = -1;
103
104	950	if ((ctx = evp_md_ctx_new_ex(pkey, id, libctx, propq)) != NULL) {
105	883	rv = ASN1_item_verify_ctx(it, alg, signature, data, ctx);
106	883	EVP_PKEY_CTX_free(EVP_MD_CTX_get_pkey_ctx(ctx));
107	883	EVP_MD_CTX_free(ctx);
108	883	}
109	950	return rv;
110	950	}
111
112		int ASN1_item_verify_ctx(const ASN1_ITEM it, const X509_ALGOR alg,
113		const ASN1_BIT_STRING signature, const void data,
114		EVP_MD_CTX *ctx)
115	883	{
116	883	EVP_PKEY *pkey;
117	883	unsigned char *buf_in = NULL;
118	883	int ret = -1, inl = 0;
119	883	int mdnid, pknid;
120	883	size_t inll = 0;
121
122	883	pkey = EVP_PKEY_CTX_get0_pkey(EVP_MD_CTX_get_pkey_ctx(ctx));
123
124	883	if (pkey == NULL) {
125	0	ERR_raise(ERR_LIB_ASN1, ERR_R_PASSED_NULL_PARAMETER);
126	0	return -1;
127	0	}
128
129	883	if (signature->type == V_ASN1_BIT_STRING && signature->flags & 0x7) {
130	2	ERR_raise(ERR_LIB_ASN1, ASN1_R_INVALID_BIT_STRING_BITS_LEFT);
131	2	return -1;
132	2	}
133
134		/* Convert signature OID into digest and public key OIDs */
135	881	if (!OBJ_find_sigid_algs(OBJ_obj2nid(alg->algorithm), &mdnid, &pknid)) {
136	9	ERR_raise(ERR_LIB_ASN1, ASN1_R_UNKNOWN_SIGNATURE_ALGORITHM);
137	9	goto err;
138	9	}
139
140	872	if (mdnid == NID_undef && evp_pkey_is_legacy(pkey)) {
141	0	if (pkey->ameth == NULL \|\| pkey->ameth->item_verify == NULL) {
142	0	ERR_raise(ERR_LIB_ASN1, ASN1_R_UNKNOWN_SIGNATURE_ALGORITHM);
143	0	goto err;
144	0	}
145	0	ret = pkey->ameth->item_verify(ctx, it, data, alg, signature, pkey);
146		/*
147		* Return values meaning:
148		* <=0: error.
149		* 1: method does everything.
150		* 2: carry on as normal, method has called EVP_DigestVerifyInit()
151		*/
152	0	if (ret <= 0)
153	0	ERR_raise(ERR_LIB_ASN1, ERR_R_EVP_LIB);
154	0	if (ret <= 1)
155	0	goto err;
156	872	} else {
157	872	const EVP_MD *type = NULL;
158
159		/*
160		* We don't yet have the ability for providers to be able to handle
161		* X509_ALGOR style parameters. Fortunately the only one that needs this
162		* so far is RSA-PSS, so we just special case this for now. In some
163		* future version of OpenSSL we should push this to the provider.
164		*/
165	872	if (mdnid == NID_undef && pknid == EVP_PKEY_RSA_PSS) {
166	521	if (!EVP_PKEY_is_a(pkey, "RSA") && !EVP_PKEY_is_a(pkey, "RSA-PSS")) {
167	0	ERR_raise(ERR_LIB_ASN1, ASN1_R_WRONG_PUBLIC_KEY_TYPE);
168	0	goto err;
169	0	}
170		/* This function also calls EVP_DigestVerifyInit */
171	521	if (ossl_rsa_pss_to_ctx(ctx, NULL, alg, pkey) <= 0) {
172	8	ERR_raise(ERR_LIB_ASN1, ERR_R_INTERNAL_ERROR);
173	8	goto err;
174	8	}
175	521	} else {
176		/* Check public key OID matches public key type */
177	351	if (!EVP_PKEY_is_a(pkey, OBJ_nid2sn(pknid))) {
178	2	ERR_raise(ERR_LIB_ASN1, ASN1_R_WRONG_PUBLIC_KEY_TYPE);
179	2	goto err;
180	2	}
181
182	349	if (mdnid != NID_undef) {
183	345	type = EVP_get_digestbynid(mdnid);
184	345	if (type == NULL) {
185	2	ERR_raise(ERR_LIB_ASN1,
186	2	ASN1_R_UNKNOWN_MESSAGE_DIGEST_ALGORITHM);
187	2	goto err;
188	2	}
189	345	}
190
191		/*
192		* Note that some algorithms (notably Ed25519 and Ed448) may allow
193		* a NULL digest value.
194		*/
195	347	if (!EVP_DigestVerifyInit(ctx, NULL, type, NULL, pkey)) {
196	4	ERR_raise(ERR_LIB_ASN1, ERR_R_EVP_LIB);
197	4	ret = 0;
198	4	goto err;
199	4	}
200	347	}
201	872	}
202
203	856	inl = ASN1_item_i2d(data, &buf_in, it);
204	856	if (inl <= 0) {
205	0	ERR_raise(ERR_LIB_ASN1, ERR_R_INTERNAL_ERROR);
206	0	goto err;
207	0	}
208	856	if (buf_in == NULL) {
209	0	ERR_raise(ERR_LIB_ASN1, ERR_R_MALLOC_FAILURE);
210	0	goto err;
211	0	}
212	856	inll = inl;
213
214	856	ret = EVP_DigestVerify(ctx, signature->data, (size_t)signature->length,
215	856	buf_in, inl);
216	856	if (ret <= 0) {
217	846	ERR_raise(ERR_LIB_ASN1, ERR_R_EVP_LIB);
218	846	goto err;
219	846	}
220	10	ret = 1;
221	881	err:
222	881	OPENSSL_clear_free(buf_in, inll);
223	881	return ret;
224	10	}