Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcrypto/pkcs7/pk7_smime.c	Lines:	146	268	54.5 %
Date:	2017-11-07	Branches:	106	218	48.6 %


/* $OpenBSD: pk7_smime.c,v 1.22 2017/01/29 17:49:23 beck Exp $ */
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
 * project.
 */
/* ====================================================================
 * Copyright (c) 1999-2004 The OpenSSL Project.  All rights reserved.
 *
 * 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 above 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 acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    licensing@OpenSSL.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED 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 OpenSSL PROJECT OR
 * ITS 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.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */

/* Simple PKCS#7 processing functions */

#include <stdio.h>

#include <openssl/err.h>
#include <openssl/x509.h>
#include <openssl/x509v3.h>

static int pkcs7_copy_existing_digest(PKCS7 *p7, PKCS7_SIGNER_INFO *si);

PKCS7 *
PKCS7_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs, BIO *data,
    int flags)
{
	PKCS7 *p7;
	int i;

	if (!(p7 = PKCS7_new())) {
		PKCS7error(ERR_R_MALLOC_FAILURE);
		return NULL;
	}

	if (!PKCS7_set_type(p7, NID_pkcs7_signed))
		goto err;

	if (!PKCS7_content_new(p7, NID_pkcs7_data))
		goto err;

	if (pkey && !PKCS7_sign_add_signer(p7, signcert, pkey, NULL, flags)) {
		PKCS7error(PKCS7_R_PKCS7_ADD_SIGNER_ERROR);
		goto err;
	}

	if (!(flags & PKCS7_NOCERTS)) {
		for (i = 0; i < sk_X509_num(certs); i++) {
			if (!PKCS7_add_certificate(p7, sk_X509_value(certs, i)))
				goto err;
		}
	}

	if (flags & PKCS7_DETACHED)
		PKCS7_set_detached(p7, 1);

	if (flags & (PKCS7_STREAM|PKCS7_PARTIAL))
		return p7;

	if (PKCS7_final(p7, data, flags))
		return p7;

err:
	PKCS7_free(p7);
	return NULL;
}

int
PKCS7_final(PKCS7 *p7, BIO *data, int flags)
{
	BIO *p7bio;
	int ret = 0;

	if (!(p7bio = PKCS7_dataInit(p7, NULL))) {
		PKCS7error(ERR_R_MALLOC_FAILURE);
		return 0;
	}

	SMIME_crlf_copy(data, p7bio, flags);

	(void)BIO_flush(p7bio);

	if (!PKCS7_dataFinal(p7, p7bio)) {
		PKCS7error(PKCS7_R_PKCS7_DATASIGN);
		goto err;
	}

	ret = 1;

err:
	BIO_free_all(p7bio);

	return ret;
}

/* Check to see if a cipher exists and if so add S/MIME capabilities */

static int
add_cipher_smcap(STACK_OF(X509_ALGOR) *sk, int nid, int arg)
{
	if (EVP_get_cipherbynid(nid))
		return PKCS7_simple_smimecap(sk, nid, arg);
	return 1;
}

static int
add_digest_smcap(STACK_OF(X509_ALGOR) *sk, int nid, int arg)
{
	if (EVP_get_digestbynid(nid))
		return PKCS7_simple_smimecap(sk, nid, arg);
	return 1;
}

PKCS7_SIGNER_INFO *
PKCS7_sign_add_signer(PKCS7 *p7, X509 *signcert, EVP_PKEY *pkey,
    const EVP_MD *md, int flags)
{
	PKCS7_SIGNER_INFO *si = NULL;
	STACK_OF(X509_ALGOR) *smcap = NULL;

	if (!X509_check_private_key(signcert, pkey)) {
		PKCS7error(PKCS7_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
		return NULL;
	}

	if (!(si = PKCS7_add_signature(p7, signcert, pkey, md))) {
		PKCS7error(PKCS7_R_PKCS7_ADD_SIGNATURE_ERROR);
		return NULL;
	}

	if (!(flags & PKCS7_NOCERTS)) {
		if (!PKCS7_add_certificate(p7, signcert))
			goto err;
	}

	if (!(flags & PKCS7_NOATTR)) {
		if (!PKCS7_add_attrib_content_type(si, NULL))
			goto err;
		/* Add SMIMECapabilities */
		if (!(flags & PKCS7_NOSMIMECAP)) {
			if (!(smcap = sk_X509_ALGOR_new_null())) {
				PKCS7error(ERR_R_MALLOC_FAILURE);
				goto err;
			}
			if (!add_cipher_smcap(smcap, NID_aes_256_cbc, -1) ||
			    !add_digest_smcap(smcap, NID_id_GostR3411_94, -1) ||
			    !add_digest_smcap(smcap, NID_id_tc26_gost3411_2012_256, -1) ||
			    !add_digest_smcap(smcap, NID_id_tc26_gost3411_2012_512, -1) ||
			    !add_cipher_smcap(smcap, NID_id_Gost28147_89, -1) ||
			    !add_cipher_smcap(smcap, NID_aes_192_cbc, -1) ||
			    !add_cipher_smcap(smcap, NID_aes_128_cbc, -1) ||
			    !add_cipher_smcap(smcap, NID_des_ede3_cbc, -1) ||
			    !add_cipher_smcap(smcap, NID_rc2_cbc, 128) ||
			    !add_cipher_smcap(smcap, NID_rc2_cbc, 64) ||
			    !add_cipher_smcap(smcap, NID_des_cbc, -1) ||
			    !add_cipher_smcap(smcap, NID_rc2_cbc, 40) ||
			    !PKCS7_add_attrib_smimecap(si, smcap))
				goto err;
			sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
			smcap = NULL;
		}
		if (flags & PKCS7_REUSE_DIGEST) {
			if (!pkcs7_copy_existing_digest(p7, si))
				goto err;
			if (!(flags & PKCS7_PARTIAL) &&
			    !PKCS7_SIGNER_INFO_sign(si))
				goto err;
		}
	}
	return si;

err:
	if (smcap)
		sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
	return NULL;
}

/* Search for a digest matching SignerInfo digest type and if found
 * copy across.
 */

static int
pkcs7_copy_existing_digest(PKCS7 *p7, PKCS7_SIGNER_INFO *si)
{
	int i;
	STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
	PKCS7_SIGNER_INFO *sitmp;
	ASN1_OCTET_STRING *osdig = NULL;

	sinfos = PKCS7_get_signer_info(p7);
	for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) {
		sitmp = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
		if (si == sitmp)
			break;
		if (sk_X509_ATTRIBUTE_num(sitmp->auth_attr) <= 0)
			continue;
		if (!OBJ_cmp(si->digest_alg->algorithm,
		    sitmp->digest_alg->algorithm)) {
			osdig = PKCS7_digest_from_attributes(sitmp->auth_attr);
			break;
		}

	}

	if (osdig)
		return PKCS7_add1_attrib_digest(si, osdig->data, osdig->length);

	PKCS7error(PKCS7_R_NO_MATCHING_DIGEST_TYPE_FOUND);
	return 0;
}

int
PKCS7_verify(PKCS7 *p7, STACK_OF(X509) *certs, X509_STORE *store, BIO *indata,
    BIO *out, int flags)
{
	STACK_OF(X509) *signers;
	X509 *signer;
	STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
	PKCS7_SIGNER_INFO *si;
	X509_STORE_CTX cert_ctx;
	char buf[4096];
	int i, j = 0, k, ret = 0;
	BIO *p7bio;
	BIO *tmpin, *tmpout;

	if (!p7) {
		PKCS7error(PKCS7_R_INVALID_NULL_POINTER);
		return 0;
	}

	if (!PKCS7_type_is_signed(p7)) {
		PKCS7error(PKCS7_R_WRONG_CONTENT_TYPE);
		return 0;
	}

	/* Check for no data and no content: no data to verify signature */
	if (PKCS7_get_detached(p7) && !indata) {
		PKCS7error(PKCS7_R_NO_CONTENT);
		return 0;
	}

	/*
	 * Very old Netscape illegally included empty content with
	 * a detached signature.  Very old users should upgrade.
	 */
	/* Check for data and content: two sets of data */
	if (!PKCS7_get_detached(p7) && indata) {
		PKCS7error(PKCS7_R_CONTENT_AND_DATA_PRESENT);
		return 0;
	}

	sinfos = PKCS7_get_signer_info(p7);

	if (!sinfos || !sk_PKCS7_SIGNER_INFO_num(sinfos)) {
		PKCS7error(PKCS7_R_NO_SIGNATURES_ON_DATA);
		return 0;
	}


	signers = PKCS7_get0_signers(p7, certs, flags);

	if (!signers)
		return 0;

	/* Now verify the certificates */

	if (!(flags & PKCS7_NOVERIFY))
		for (k = 0; k < sk_X509_num(signers); k++) {
			signer = sk_X509_value (signers, k);
			if  (!(flags & PKCS7_NOCHAIN)) {
				if (!X509_STORE_CTX_init(&cert_ctx, store,
				    signer, p7->d.sign->cert)) {
					PKCS7error(ERR_R_X509_LIB);
					sk_X509_free(signers);
					return 0;
				}
				if (X509_STORE_CTX_set_default(&cert_ctx,
				    "smime_sign") == 0) {
					sk_X509_free(signers);
					return 0;
				}
			} else if (!X509_STORE_CTX_init(&cert_ctx, store,
			    signer, NULL)) {
				PKCS7error(ERR_R_X509_LIB);
				sk_X509_free(signers);
				return 0;
			}
			if (!(flags & PKCS7_NOCRL))
				X509_STORE_CTX_set0_crls(&cert_ctx, p7->d.sign->crl);
			i = X509_verify_cert(&cert_ctx);
			if (i <= 0)
				j = X509_STORE_CTX_get_error(&cert_ctx);
			X509_STORE_CTX_cleanup(&cert_ctx);
			if (i <= 0) {
				PKCS7error(PKCS7_R_CERTIFICATE_VERIFY_ERROR);
				ERR_asprintf_error_data("Verify error:%s",
				    X509_verify_cert_error_string(j));
				sk_X509_free(signers);
				return 0;
			}
			/* Check for revocation status here */
		}

	/*
	 * Performance optimization: if the content is a memory BIO then
	 * store its contents in a temporary read only memory BIO. This
	 * avoids potentially large numbers of slow copies of data which will
	 * occur when reading from a read write memory BIO when signatures
	 * are calculated.
	 */
	if (indata && (BIO_method_type(indata) == BIO_TYPE_MEM)) {
		char *ptr;
		long len;

		len = BIO_get_mem_data(indata, &ptr);
		tmpin = BIO_new_mem_buf(ptr, len);
		if (tmpin == NULL) {
			PKCS7error(ERR_R_MALLOC_FAILURE);
			return 0;
		}
	} else
		tmpin = indata;


	if (!(p7bio = PKCS7_dataInit(p7, tmpin)))
		goto err;

	if (flags & PKCS7_TEXT) {
		if (!(tmpout = BIO_new(BIO_s_mem()))) {
			PKCS7error(ERR_R_MALLOC_FAILURE);
			goto err;
		}
		BIO_set_mem_eof_return(tmpout, 0);
	} else
		tmpout = out;

	/* We now have to 'read' from p7bio to calculate digests etc. */
	for (;;) {
		i = BIO_read(p7bio, buf, sizeof(buf));
		if (i <= 0)
			break;
		if (tmpout)
			BIO_write(tmpout, buf, i);
	}

	if (flags & PKCS7_TEXT) {
		if (!SMIME_text(tmpout, out)) {
			PKCS7error(PKCS7_R_SMIME_TEXT_ERROR);
			BIO_free(tmpout);
			goto err;
		}
		BIO_free(tmpout);
	}

	/* Now Verify All Signatures */
	if (!(flags & PKCS7_NOSIGS))
		for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) {
			si = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
			signer = sk_X509_value (signers, i);
			j = PKCS7_signatureVerify(p7bio, p7, si, signer);
			if (j <= 0) {
				PKCS7error(PKCS7_R_SIGNATURE_FAILURE);
				goto err;
			}
		}

	ret = 1;

err:
	if (tmpin == indata) {
		if (indata)
			BIO_pop(p7bio);
	}
	BIO_free_all(p7bio);
	sk_X509_free(signers);

	return ret;
}

STACK_OF(X509) *
PKCS7_get0_signers(PKCS7 *p7, STACK_OF(X509) *certs, int flags)
{
	STACK_OF(X509) *signers;
	STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
	PKCS7_SIGNER_INFO *si;
	PKCS7_ISSUER_AND_SERIAL *ias;
	X509 *signer;
	int i;

	if (!p7) {
		PKCS7error(PKCS7_R_INVALID_NULL_POINTER);
		return NULL;
	}

	if (!PKCS7_type_is_signed(p7)) {
		PKCS7error(PKCS7_R_WRONG_CONTENT_TYPE);
		return NULL;
	}

	/* Collect all the signers together */
	sinfos = PKCS7_get_signer_info(p7);
	if (sk_PKCS7_SIGNER_INFO_num(sinfos) <= 0) {
		PKCS7error(PKCS7_R_NO_SIGNERS);
		return 0;
	}

	if (!(signers = sk_X509_new_null())) {
		PKCS7error(ERR_R_MALLOC_FAILURE);
		return NULL;
	}

	for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) {
		si = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
		ias = si->issuer_and_serial;
		signer = NULL;
		/* If any certificates passed they take priority */
		if (certs)
			signer = X509_find_by_issuer_and_serial (certs,
			    ias->issuer, ias->serial);
		if (!signer && !(flags & PKCS7_NOINTERN) && p7->d.sign->cert)
			signer =
			    X509_find_by_issuer_and_serial(p7->d.sign->cert,
			      ias->issuer, ias->serial);
		if (!signer) {
			PKCS7error(PKCS7_R_SIGNER_CERTIFICATE_NOT_FOUND);
			sk_X509_free(signers);
			return 0;
		}

		if (!sk_X509_push(signers, signer)) {
			sk_X509_free(signers);
			return NULL;
		}
	}
	return signers;
}

/* Build a complete PKCS#7 enveloped data */

PKCS7 *
PKCS7_encrypt(STACK_OF(X509) *certs, BIO *in, const EVP_CIPHER *cipher,
    int flags)
{
	PKCS7 *p7;
	BIO *p7bio = NULL;
	int i;
	X509 *x509;

	if (!(p7 = PKCS7_new())) {
		PKCS7error(ERR_R_MALLOC_FAILURE);
		return NULL;
	}

	if (!PKCS7_set_type(p7, NID_pkcs7_enveloped))
		goto err;
	if (!PKCS7_set_cipher(p7, cipher)) {
		PKCS7error(PKCS7_R_ERROR_SETTING_CIPHER);
		goto err;
	}

	for (i = 0; i < sk_X509_num(certs); i++) {
		x509 = sk_X509_value(certs, i);
		if (!PKCS7_add_recipient(p7, x509)) {
			PKCS7error(PKCS7_R_ERROR_ADDING_RECIPIENT);
			goto err;
		}
	}

	if (flags & PKCS7_STREAM)
		return p7;

	if (PKCS7_final(p7, in, flags))
		return p7;

err:
	BIO_free_all(p7bio);
	PKCS7_free(p7);
	return NULL;
}

int
PKCS7_decrypt(PKCS7 *p7, EVP_PKEY *pkey, X509 *cert, BIO *data, int flags)
{
	BIO *tmpmem;
	int ret, i;
	char buf[4096];

	if (!p7) {
		PKCS7error(PKCS7_R_INVALID_NULL_POINTER);
		return 0;
	}

	if (!PKCS7_type_is_enveloped(p7)) {
		PKCS7error(PKCS7_R_WRONG_CONTENT_TYPE);
		return 0;
	}

	if (cert && !X509_check_private_key(cert, pkey)) {
		PKCS7error(PKCS7_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
		return 0;
	}

	if (!(tmpmem = PKCS7_dataDecode(p7, pkey, NULL, cert))) {
		PKCS7error(PKCS7_R_DECRYPT_ERROR);
		return 0;
	}

	if (flags & PKCS7_TEXT) {
		BIO *tmpbuf;

		/* Encrypt BIOs can't do BIO_gets() so add a buffer BIO */
		if (!(tmpbuf = BIO_new(BIO_f_buffer()))) {
			PKCS7error(ERR_R_MALLOC_FAILURE);
			BIO_free_all(tmpmem);
			return 0;
		}
		BIO_push(tmpbuf, tmpmem);
		ret = SMIME_text(tmpbuf, data);
		if (ret > 0 && BIO_method_type(tmpmem) == BIO_TYPE_CIPHER) {
			if (!BIO_get_cipher_status(tmpmem))
				ret = 0;
		}
		BIO_free_all(tmpbuf);
		return ret;
	} else {
		for (;;) {
			i = BIO_read(tmpmem, buf, sizeof(buf));
			if (i <= 0) {
				ret = 1;
				if (BIO_method_type(tmpmem) ==
				    BIO_TYPE_CIPHER) {
					if (!BIO_get_cipher_status(tmpmem))
						ret = 0;
				}
				break;
			}
			if (BIO_write(data, buf, i) != i) {
				ret = 0;
				break;
			}
		}
		BIO_free_all(tmpmem);
		return ret;
	}
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: pk7_smime.c,v 1.22 2017/01/29 17:49:23 beck Exp $ */
2			/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3			* project.
4			*/
5			/* ====================================================================
6			* Copyright (c) 1999-2004 The OpenSSL Project. All rights reserved.
7			*
8			* Redistribution and use in source and binary forms, with or without
9			* modification, are permitted provided that the following conditions
10			* are met:
11			*
12			* 1. Redistributions of source code must retain the above copyright
13			* notice, this list of conditions and the following disclaimer.
14			*
15			* 2. Redistributions in binary form must reproduce the above copyright
16			* notice, this list of conditions and the following disclaimer in
17			* the documentation and/or other materials provided with the
18			* distribution.
19			*
20			* 3. All advertising materials mentioning features or use of this
21			* software must display the following acknowledgment:
22			* "This product includes software developed by the OpenSSL Project
23			* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24			*
25			* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26			* endorse or promote products derived from this software without
27			* prior written permission. For written permission, please contact
28			* licensing@OpenSSL.org.
29			*
30			* 5. Products derived from this software may not be called "OpenSSL"
31			* nor may "OpenSSL" appear in their names without prior written
32			* permission of the OpenSSL Project.
33			*
34			* 6. Redistributions of any form whatsoever must retain the following
35			* acknowledgment:
36			* "This product includes software developed by the OpenSSL Project
37			* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38			*
39			* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40			* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42			* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43			* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44			* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45			* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46			* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48			* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49			* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50			* OF THE POSSIBILITY OF SUCH DAMAGE.
51			* ====================================================================
52			*
53			* This product includes cryptographic software written by Eric Young
54			* (eay@cryptsoft.com). This product includes software written by Tim
55			* Hudson (tjh@cryptsoft.com).
56			*
57			*/
58
59			/* Simple PKCS#7 processing functions */
60
61			#include <stdio.h>
62
63			#include <openssl/err.h>
64			#include <openssl/x509.h>
65			#include <openssl/x509v3.h>
66
67			static int pkcs7_copy_existing_digest(PKCS7 p7, PKCS7_SIGNER_INFO si);
68
69			PKCS7 *
70			PKCS7_sign(X509 signcert, EVP_PKEY pkey, STACK_OF(X509) certs, BIO data,
71			int flags)
72			{
73			PKCS7 *p7;
74			int i;
75
76	✗✓	28	if (!(p7 = PKCS7_new())) {
77			PKCS7error(ERR_R_MALLOC_FAILURE);
78			return NULL;
79			}
80
81	✓✗	14	if (!PKCS7_set_type(p7, NID_pkcs7_signed))
82			goto err;
83
84	✓✗	14	if (!PKCS7_content_new(p7, NID_pkcs7_data))
85			goto err;
86
87	✓✓✗✓	20	if (pkey && !PKCS7_sign_add_signer(p7, signcert, pkey, NULL, flags)) {
88			PKCS7error(PKCS7_R_PKCS7_ADD_SIGNER_ERROR);
89			goto err;
90			}
91
92	✓✗	14	if (!(flags & PKCS7_NOCERTS)) {
93	✓✓	40	for (i = 0; i < sk_X509_num(certs); i++) {
94	✓✗	6	if (!PKCS7_add_certificate(p7, sk_X509_value(certs, i)))
95			goto err;
96			}
97			}
98
99	✓✓	14	if (flags & PKCS7_DETACHED)
100		8	PKCS7_set_detached(p7, 1);
101
102	✓✓	14	if (flags & (PKCS7_STREAM\|PKCS7_PARTIAL))
103		8	return p7;
104
105	✓✗	6	if (PKCS7_final(p7, data, flags))
106		6	return p7;
107
108			err:
109			PKCS7_free(p7);
110			return NULL;
111		14	}
112
113			int
114			PKCS7_final(PKCS7 p7, BIO data, int flags)
115			{
116			BIO *p7bio;
117			int ret = 0;
118
119	✗✓	36	if (!(p7bio = PKCS7_dataInit(p7, NULL))) {
120			PKCS7error(ERR_R_MALLOC_FAILURE);
121			return 0;
122			}
123
124		18	SMIME_crlf_copy(data, p7bio, flags);
125
126		18	(void)BIO_flush(p7bio);
127
128	✗✓	18	if (!PKCS7_dataFinal(p7, p7bio)) {
129			PKCS7error(PKCS7_R_PKCS7_DATASIGN);
130			goto err;
131			}
132
133		18	ret = 1;
134
135			err:
136		18	BIO_free_all(p7bio);
137
138		18	return ret;
139		18	}
140
141			/* Check to see if a cipher exists and if so add S/MIME capabilities */
142
143			static int
144			add_cipher_smcap(STACK_OF(X509_ALGOR) *sk, int nid, int arg)
145			{
146	✓✗	252	if (EVP_get_cipherbynid(nid))
147		126	return PKCS7_simple_smimecap(sk, nid, arg);
148			return 1;
149		126	}
150
151			static int
152			add_digest_smcap(STACK_OF(X509_ALGOR) *sk, int nid, int arg)
153			{
154	✓✗	84	if (EVP_get_digestbynid(nid))
155		42	return PKCS7_simple_smimecap(sk, nid, arg);
156			return 1;
157		42	}
158
159			PKCS7_SIGNER_INFO *
160			PKCS7_sign_add_signer(PKCS7 p7, X509 signcert, EVP_PKEY *pkey,
161			const EVP_MD *md, int flags)
162			{
163			PKCS7_SIGNER_INFO *si = NULL;
164			STACK_OF(X509_ALGOR) *smcap = NULL;
165
166	✗✓	28	if (!X509_check_private_key(signcert, pkey)) {
167			PKCS7error(PKCS7_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
168			return NULL;
169			}
170
171	✗✓	14	if (!(si = PKCS7_add_signature(p7, signcert, pkey, md))) {
172			PKCS7error(PKCS7_R_PKCS7_ADD_SIGNATURE_ERROR);
173			return NULL;
174			}
175
176	✓✗	14	if (!(flags & PKCS7_NOCERTS)) {
177	✓✗	14	if (!PKCS7_add_certificate(p7, signcert))
178			goto err;
179			}
180
181	✓✗	14	if (!(flags & PKCS7_NOATTR)) {
182	✓✗	14	if (!PKCS7_add_attrib_content_type(si, NULL))
183			goto err;
184			/* Add SMIMECapabilities */
185	✓✗	14	if (!(flags & PKCS7_NOSMIMECAP)) {
186	✗✓	14	if (!(smcap = sk_X509_ALGOR_new_null())) {
187			PKCS7error(ERR_R_MALLOC_FAILURE);
188			goto err;
189			}
190	✓✗✓✗	28	if (!add_cipher_smcap(smcap, NID_aes_256_cbc, -1) \|\|
191	✓✗	14	!add_digest_smcap(smcap, NID_id_GostR3411_94, -1) \|\|
192	✓✗	14	!add_digest_smcap(smcap, NID_id_tc26_gost3411_2012_256, -1) \|\|
193	✓✗	14	!add_digest_smcap(smcap, NID_id_tc26_gost3411_2012_512, -1) \|\|
194	✓✗	14	!add_cipher_smcap(smcap, NID_id_Gost28147_89, -1) \|\|
195	✓✗	14	!add_cipher_smcap(smcap, NID_aes_192_cbc, -1) \|\|
196	✓✗	14	!add_cipher_smcap(smcap, NID_aes_128_cbc, -1) \|\|
197	✓✗	14	!add_cipher_smcap(smcap, NID_des_ede3_cbc, -1) \|\|
198	✓✗	14	!add_cipher_smcap(smcap, NID_rc2_cbc, 128) \|\|
199	✓✗	14	!add_cipher_smcap(smcap, NID_rc2_cbc, 64) \|\|
200	✓✗	14	!add_cipher_smcap(smcap, NID_des_cbc, -1) \|\|
201	✓✗	14	!add_cipher_smcap(smcap, NID_rc2_cbc, 40) \|\|
202		14	!PKCS7_add_attrib_smimecap(si, smcap))
203			goto err;
204		14	sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
205			smcap = NULL;
206		14	}
207	✗✓	14	if (flags & PKCS7_REUSE_DIGEST) {
208			if (!pkcs7_copy_existing_digest(p7, si))
209			goto err;
210			if (!(flags & PKCS7_PARTIAL) &&
211			!PKCS7_SIGNER_INFO_sign(si))
212			goto err;
213			}
214			}
215		14	return si;
216
217			err:
218			if (smcap)
219			sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
220			return NULL;
221		14	}
222
223			/* Search for a digest matching SignerInfo digest type and if found
224			* copy across.
225			*/
226
227			static int
228			pkcs7_copy_existing_digest(PKCS7 p7, PKCS7_SIGNER_INFO si)
229			{
230			int i;
231			STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
232			PKCS7_SIGNER_INFO *sitmp;
233			ASN1_OCTET_STRING *osdig = NULL;
234
235			sinfos = PKCS7_get_signer_info(p7);
236			for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) {
237			sitmp = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
238			if (si == sitmp)
239			break;
240			if (sk_X509_ATTRIBUTE_num(sitmp->auth_attr) <= 0)
241			continue;
242			if (!OBJ_cmp(si->digest_alg->algorithm,
243			sitmp->digest_alg->algorithm)) {
244			osdig = PKCS7_digest_from_attributes(sitmp->auth_attr);
245			break;
246			}
247
248			}
249
250			if (osdig)
251			return PKCS7_add1_attrib_digest(si, osdig->data, osdig->length);
252
253			PKCS7error(PKCS7_R_NO_MATCHING_DIGEST_TYPE_FOUND);
254			return 0;
255			}
256
257			int
258			PKCS7_verify(PKCS7 p7, STACK_OF(X509) certs, X509_STORE store, BIO indata,
259			BIO *out, int flags)
260			{
261			STACK_OF(X509) *signers;
262			X509 *signer;
263			STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
264			PKCS7_SIGNER_INFO *si;
265		28	X509_STORE_CTX cert_ctx;
266		14	char buf[4096];
267			int i, j = 0, k, ret = 0;
268			BIO *p7bio;
269			BIO tmpin, tmpout;
270
271	✗✓	14	if (!p7) {
272			PKCS7error(PKCS7_R_INVALID_NULL_POINTER);
273			return 0;
274			}
275
276	✗✓	14	if (!PKCS7_type_is_signed(p7)) {
277			PKCS7error(PKCS7_R_WRONG_CONTENT_TYPE);
278			return 0;
279			}
280
281			/* Check for no data and no content: no data to verify signature */
282	✗✓	14	if (PKCS7_get_detached(p7) && !indata) {
283			PKCS7error(PKCS7_R_NO_CONTENT);
284			return 0;
285			}
286
287			/*
288			* Very old Netscape illegally included empty content with
289			* a detached signature. Very old users should upgrade.
290			*/
291			/* Check for data and content: two sets of data */
292	✗✓	14	if (!PKCS7_get_detached(p7) && indata) {
293			PKCS7error(PKCS7_R_CONTENT_AND_DATA_PRESENT);
294			return 0;
295			}
296
297		14	sinfos = PKCS7_get_signer_info(p7);
298
299	✓✗✗✓	28	if (!sinfos \|\| !sk_PKCS7_SIGNER_INFO_num(sinfos)) {
300			PKCS7error(PKCS7_R_NO_SIGNATURES_ON_DATA);
301			return 0;
302			}
303
304
305		14	signers = PKCS7_get0_signers(p7, certs, flags);
306
307	✗✓	14	if (!signers)
308			return 0;
309
310			/* Now verify the certificates */
311
312	✓✗	14	if (!(flags & PKCS7_NOVERIFY))
313	✓✓	56	for (k = 0; k < sk_X509_num(signers); k++) {
314		14	signer = sk_X509_value (signers, k);
315	✓✗	14	if (!(flags & PKCS7_NOCHAIN)) {
316	✗✓	14	if (!X509_STORE_CTX_init(&cert_ctx, store,
317		14	signer, p7->d.sign->cert)) {
318			PKCS7error(ERR_R_X509_LIB);
319			sk_X509_free(signers);
320			return 0;
321			}
322	✗✓	28	if (X509_STORE_CTX_set_default(&cert_ctx,
323		14	"smime_sign") == 0) {
324			sk_X509_free(signers);
325			return 0;
326			}
327			} else if (!X509_STORE_CTX_init(&cert_ctx, store,
328			signer, NULL)) {
329			PKCS7error(ERR_R_X509_LIB);
330			sk_X509_free(signers);
331			return 0;
332			}
333	✓✗	14	if (!(flags & PKCS7_NOCRL))
334		14	X509_STORE_CTX_set0_crls(&cert_ctx, p7->d.sign->crl);
335		14	i = X509_verify_cert(&cert_ctx);
336	✗✓	14	if (i <= 0)
337			j = X509_STORE_CTX_get_error(&cert_ctx);
338		14	X509_STORE_CTX_cleanup(&cert_ctx);
339	✗✓	14	if (i <= 0) {
340			PKCS7error(PKCS7_R_CERTIFICATE_VERIFY_ERROR);
341			ERR_asprintf_error_data("Verify error:%s",
342			X509_verify_cert_error_string(j));
343			sk_X509_free(signers);
344			return 0;
345			}
346			/* Check for revocation status here */
347			}
348
349			/*
350			* Performance optimization: if the content is a memory BIO then
351			* store its contents in a temporary read only memory BIO. This
352			* avoids potentially large numbers of slow copies of data which will
353			* occur when reading from a read write memory BIO when signatures
354			* are calculated.
355			*/
356	✓✓✓✗	22	if (indata && (BIO_method_type(indata) == BIO_TYPE_MEM)) {
357		8	char *ptr;
358			long len;
359
360		8	len = BIO_get_mem_data(indata, &ptr);
361		8	tmpin = BIO_new_mem_buf(ptr, len);
362	✗✓	8	if (tmpin == NULL) {
363			PKCS7error(ERR_R_MALLOC_FAILURE);
364			return 0;
365			}
366	✓✗	16	} else
367			tmpin = indata;
368
369
370	✓✗	14	if (!(p7bio = PKCS7_dataInit(p7, tmpin)))
371			goto err;
372
373	✗✓	14	if (flags & PKCS7_TEXT) {
374			if (!(tmpout = BIO_new(BIO_s_mem()))) {
375			PKCS7error(ERR_R_MALLOC_FAILURE);
376			goto err;
377			}
378			BIO_set_mem_eof_return(tmpout, 0);
379			} else
380			tmpout = out;
381
382			/* We now have to 'read' from p7bio to calculate digests etc. */
383			for (;;) {
384		28	i = BIO_read(p7bio, buf, sizeof(buf));
385	✓✓	28	if (i <= 0)
386			break;
387	✗✓	14	if (tmpout)
388		14	BIO_write(tmpout, buf, i);
389			}
390
391	✗✓	14	if (flags & PKCS7_TEXT) {
392			if (!SMIME_text(tmpout, out)) {
393			PKCS7error(PKCS7_R_SMIME_TEXT_ERROR);
394			BIO_free(tmpout);
395			goto err;
396			}
397			BIO_free(tmpout);
398			}
399
400			/* Now Verify All Signatures */
401	✓✗	14	if (!(flags & PKCS7_NOSIGS))
402	✓✓	56	for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) {
403		14	si = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
404		14	signer = sk_X509_value (signers, i);
405		14	j = PKCS7_signatureVerify(p7bio, p7, si, signer);
406	✗✓	14	if (j <= 0) {
407			PKCS7error(PKCS7_R_SIGNATURE_FAILURE);
408			goto err;
409			}
410			}
411
412		14	ret = 1;
413
414			err:
415	✗✓	14	if (tmpin == indata) {
416			if (indata)
417			BIO_pop(p7bio);
418			}
419		14	BIO_free_all(p7bio);
420		14	sk_X509_free(signers);
421
422		14	return ret;
423		14	}
424
425			STACK_OF(X509) *
426			PKCS7_get0_signers(PKCS7 p7, STACK_OF(X509) certs, int flags)
427			{
428			STACK_OF(X509) *signers;
429			STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
430			PKCS7_SIGNER_INFO *si;
431			PKCS7_ISSUER_AND_SERIAL *ias;
432			X509 *signer;
433			int i;
434
435	✗✓	36	if (!p7) {
436			PKCS7error(PKCS7_R_INVALID_NULL_POINTER);
437			return NULL;
438			}
439
440	✗✓	18	if (!PKCS7_type_is_signed(p7)) {
441			PKCS7error(PKCS7_R_WRONG_CONTENT_TYPE);
442			return NULL;
443			}
444
445			/* Collect all the signers together */
446		18	sinfos = PKCS7_get_signer_info(p7);
447	✗✓	18	if (sk_PKCS7_SIGNER_INFO_num(sinfos) <= 0) {
448			PKCS7error(PKCS7_R_NO_SIGNERS);
449			return 0;
450			}
451
452	✗✓	18	if (!(signers = sk_X509_new_null())) {
453			PKCS7error(ERR_R_MALLOC_FAILURE);
454			return NULL;
455			}
456
457	✓✓	72	for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) {
458		18	si = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
459		18	ias = si->issuer_and_serial;
460			signer = NULL;
461			/* If any certificates passed they take priority */
462	✓✓	18	if (certs)
463		14	signer = X509_find_by_issuer_and_serial (certs,
464		14	ias->issuer, ias->serial);
465	✓✓✓✗ ✓✗	26	if (!signer && !(flags & PKCS7_NOINTERN) && p7->d.sign->cert)
466		4	signer =
467		4	X509_find_by_issuer_and_serial(p7->d.sign->cert,
468		4	ias->issuer, ias->serial);
469	✗✓	18	if (!signer) {
470			PKCS7error(PKCS7_R_SIGNER_CERTIFICATE_NOT_FOUND);
471			sk_X509_free(signers);
472			return 0;
473			}
474
475	✗✓	18	if (!sk_X509_push(signers, signer)) {
476			sk_X509_free(signers);
477			return NULL;
478			}
479			}
480		18	return signers;
481		18	}
482
483			/* Build a complete PKCS#7 enveloped data */
484
485			PKCS7 *
486			PKCS7_encrypt(STACK_OF(X509) certs, BIO in, const EVP_CIPHER *cipher,
487			int flags)
488			{
489			PKCS7 *p7;
490			BIO *p7bio = NULL;
491			int i;
492			X509 *x509;
493
494	✗✓	12	if (!(p7 = PKCS7_new())) {
495			PKCS7error(ERR_R_MALLOC_FAILURE);
496			return NULL;
497			}
498
499	✓✗	6	if (!PKCS7_set_type(p7, NID_pkcs7_enveloped))
500			goto err;
501	✗✓	6	if (!PKCS7_set_cipher(p7, cipher)) {
502			PKCS7error(PKCS7_R_ERROR_SETTING_CIPHER);
503			goto err;
504			}
505
506	✓✓	24	for (i = 0; i < sk_X509_num(certs); i++) {
507		6	x509 = sk_X509_value(certs, i);
508	✗✓	6	if (!PKCS7_add_recipient(p7, x509)) {
509			PKCS7error(PKCS7_R_ERROR_ADDING_RECIPIENT);
510			goto err;
511			}
512			}
513
514	✗✓	6	if (flags & PKCS7_STREAM)
515			return p7;
516
517	✓✗	6	if (PKCS7_final(p7, in, flags))
518		6	return p7;
519
520			err:
521			BIO_free_all(p7bio);
522			PKCS7_free(p7);
523			return NULL;
524		6	}
525
526			int
527			PKCS7_decrypt(PKCS7 p7, EVP_PKEY pkey, X509 cert, BIO data, int flags)
528			{
529			BIO *tmpmem;
530			int ret, i;
531		12	char buf[4096];
532
533	✗✓	6	if (!p7) {
534			PKCS7error(PKCS7_R_INVALID_NULL_POINTER);
535			return 0;
536			}
537
538	✗✓	6	if (!PKCS7_type_is_enveloped(p7)) {
539			PKCS7error(PKCS7_R_WRONG_CONTENT_TYPE);
540			return 0;
541			}
542
543	✓✗✗✓	12	if (cert && !X509_check_private_key(cert, pkey)) {
544			PKCS7error(PKCS7_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
545			return 0;
546			}
547
548	✗✓	6	if (!(tmpmem = PKCS7_dataDecode(p7, pkey, NULL, cert))) {
549			PKCS7error(PKCS7_R_DECRYPT_ERROR);
550			return 0;
551			}
552
553	✗✓	6	if (flags & PKCS7_TEXT) {
554			BIO *tmpbuf;
555
556			/* Encrypt BIOs can't do BIO_gets() so add a buffer BIO */
557			if (!(tmpbuf = BIO_new(BIO_f_buffer()))) {
558			PKCS7error(ERR_R_MALLOC_FAILURE);
559			BIO_free_all(tmpmem);
560			return 0;
561			}
562			BIO_push(tmpbuf, tmpmem);
563			ret = SMIME_text(tmpbuf, data);
564			if (ret > 0 && BIO_method_type(tmpmem) == BIO_TYPE_CIPHER) {
565			if (!BIO_get_cipher_status(tmpmem))
566			ret = 0;
567			}
568			BIO_free_all(tmpbuf);
569			return ret;
570			} else {
571			for (;;) {
572		12	i = BIO_read(tmpmem, buf, sizeof(buf));
573	✓✓	12	if (i <= 0) {
574			ret = 1;
575	✓✗	6	if (BIO_method_type(tmpmem) ==
576			BIO_TYPE_CIPHER) {
577	✗✓	6	if (!BIO_get_cipher_status(tmpmem))
578			ret = 0;
579			}
580			break;
581			}
582	✓✗	6	if (BIO_write(data, buf, i) != i) {
583			ret = 0;
584			break;
585			}
586			}
587		6	BIO_free_all(tmpmem);
588		6	return ret;
589			}
590		6	}