crypto/cms/cms_enc.c

/* crypto/cms/cms_enc.c */
/*
 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
 * project.
 */
/* ====================================================================
 * Copyright (c) 2008 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.
 * ====================================================================
 */

#include "cryptlib.h"
#include <openssl/asn1t.h>
#include <openssl/pem.h>
#include <openssl/x509v3.h>
#include <openssl/err.h>
#include <openssl/cms.h>
#include <openssl/rand.h>
#include "cms_lcl.h"

/* CMS EncryptedData Utilities */

DECLARE_ASN1_ITEM(CMS_EncryptedData)

/* Return BIO based on EncryptedContentInfo and key */

BIO *cms_EncryptedContent_init_bio(CMS_EncryptedContentInfo *ec)
{
    BIO *b;
    EVP_CIPHER_CTX *ctx;
    const EVP_CIPHER *ciph;
    X509_ALGOR *calg = ec->contentEncryptionAlgorithm;
    unsigned char iv[EVP_MAX_IV_LENGTH], *piv = NULL;
    unsigned char *tkey = NULL;
    size_t tkeylen = 0;

    int ok = 0;

    int enc, keep_key = 0;

    enc = ec->cipher ? 1 : 0;

    b = BIO_new(BIO_f_cipher());
    if (!b) {
        CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO, ERR_R_MALLOC_FAILURE);
        return NULL;
    }

    BIO_get_cipher_ctx(b, &ctx);

    if (enc) {
        ciph = ec->cipher;
        /*
         * If not keeping key set cipher to NULL so subsequent calls decrypt.
         */
        if (ec->key)
            ec->cipher = NULL;
    } else {
        ciph = EVP_get_cipherbyobj(calg->algorithm);

        if (!ciph) {
            CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO, CMS_R_UNKNOWN_CIPHER);
            goto err;
        }
    }

    if (EVP_CipherInit_ex(ctx, ciph, NULL, NULL, NULL, enc) <= 0) {
        CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
               CMS_R_CIPHER_INITIALISATION_ERROR);
        goto err;
    }

    if (enc) {
        int ivlen;
        calg->algorithm = OBJ_nid2obj(EVP_CIPHER_CTX_type(ctx));
        /* Generate a random IV if we need one */
        ivlen = EVP_CIPHER_CTX_iv_length(ctx);
        if (ivlen > 0) {
            if (RAND_bytes(iv, ivlen) <= 0)
                goto err;
            piv = iv;
        }
    } else if (EVP_CIPHER_asn1_to_param(ctx, calg->parameter) <= 0) {
        CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
               CMS_R_CIPHER_PARAMETER_INITIALISATION_ERROR);
        goto err;
    }
    tkeylen = EVP_CIPHER_CTX_key_length(ctx);
    /* Generate random session key */
    if (!enc || !ec->key) {
        tkey = OPENSSL_malloc(tkeylen);
        if (!tkey) {
            CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO, ERR_R_MALLOC_FAILURE);
            goto err;
        }
        if (EVP_CIPHER_CTX_rand_key(ctx, tkey) <= 0)
            goto err;
    }

    if (!ec->key) {
        ec->key = tkey;
        ec->keylen = tkeylen;
        tkey = NULL;
        if (enc)
            keep_key = 1;
        else
            ERR_clear_error();

    }

    if (ec->keylen != tkeylen) {
        /* If necessary set key length */
        if (EVP_CIPHER_CTX_set_key_length(ctx, ec->keylen) <= 0) {
            /*
             * Only reveal failure if debugging so we don't leak information
             * which may be useful in MMA.
             */
            if (enc || ec->debug) {
                CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
                       CMS_R_INVALID_KEY_LENGTH);
                goto err;
            } else {
                /* Use random key */
                OPENSSL_cleanse(ec->key, ec->keylen);
                OPENSSL_free(ec->key);
                ec->key = tkey;
                ec->keylen = tkeylen;
                tkey = NULL;
                ERR_clear_error();
            }
        }
    }

    if (EVP_CipherInit_ex(ctx, NULL, NULL, ec->key, piv, enc) <= 0) {
        CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
               CMS_R_CIPHER_INITIALISATION_ERROR);
        goto err;
    }
    if (enc) {
        calg->parameter = ASN1_TYPE_new();
        if (calg->parameter == NULL) {
            CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO, ERR_R_MALLOC_FAILURE);
            goto err;
        }
        if (EVP_CIPHER_param_to_asn1(ctx, calg->parameter) <= 0) {
            CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
                   CMS_R_CIPHER_PARAMETER_INITIALISATION_ERROR);
            goto err;
        }
        /* If parameter type not set omit parameter */
        if (calg->parameter->type == V_ASN1_UNDEF) {
            ASN1_TYPE_free(calg->parameter);
            calg->parameter = NULL;
        }
    }
    ok = 1;

 err:
    if (ec->key && (!keep_key || !ok)) {
        OPENSSL_cleanse(ec->key, ec->keylen);
        OPENSSL_free(ec->key);
        ec->key = NULL;
    }
    if (tkey) {
        OPENSSL_cleanse(tkey, tkeylen);
        OPENSSL_free(tkey);
    }
    if (ok)
        return b;
    BIO_free(b);
    return NULL;
}

int cms_EncryptedContent_init(CMS_EncryptedContentInfo *ec,
                              const EVP_CIPHER *cipher,
                              const unsigned char *key, size_t keylen)
{
    ec->cipher = cipher;
    if (key) {
        ec->key = OPENSSL_malloc(keylen);
        if (!ec->key)
            return 0;
        memcpy(ec->key, key, keylen);
    }
    ec->keylen = keylen;
    if (cipher)
        ec->contentType = OBJ_nid2obj(NID_pkcs7_data);
    return 1;
}

int CMS_EncryptedData_set1_key(CMS_ContentInfo *cms, const EVP_CIPHER *ciph,
                               const unsigned char *key, size_t keylen)
{
    CMS_EncryptedContentInfo *ec;
    if (!key || !keylen) {
        CMSerr(CMS_F_CMS_ENCRYPTEDDATA_SET1_KEY, CMS_R_NO_KEY);
        return 0;
    }
    if (ciph) {
        cms->d.encryptedData = M_ASN1_new_of(CMS_EncryptedData);
        if (!cms->d.encryptedData) {
            CMSerr(CMS_F_CMS_ENCRYPTEDDATA_SET1_KEY, ERR_R_MALLOC_FAILURE);
            return 0;
        }
        cms->contentType = OBJ_nid2obj(NID_pkcs7_encrypted);
        cms->d.encryptedData->version = 0;
    } else if (OBJ_obj2nid(cms->contentType) != NID_pkcs7_encrypted) {
        CMSerr(CMS_F_CMS_ENCRYPTEDDATA_SET1_KEY, CMS_R_NOT_ENCRYPTED_DATA);
        return 0;
    }
    ec = cms->d.encryptedData->encryptedContentInfo;
    return cms_EncryptedContent_init(ec, ciph, key, keylen);
}

BIO *cms_EncryptedData_init_bio(CMS_ContentInfo *cms)
{
    CMS_EncryptedData *enc = cms->d.encryptedData;
    if (enc->encryptedContentInfo->cipher && enc->unprotectedAttrs)
        enc->version = 2;
    return cms_EncryptedContent_init_bio(enc->encryptedContentInfo);
}
Revision:	11620
Committed:	Sun Jul 8 16:40:18 2018 UTC (5 years, 9 months ago) by laffer1
Content type:	text/plain
File size:	8731 byte(s)
Log Message:	fix merge issues
#	Content
1	/* crypto/cms/cms_enc.c */
2	/*
3	* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
4	* project.
5	*/
6	/* ====================================================================
7	* Copyright (c) 2008 The OpenSSL Project. All rights reserved.
8	*
9	* Redistribution and use in source and binary forms, with or without
10	* modification, are permitted provided that the following conditions
11	* are met:
12	*
13	* 1. Redistributions of source code must retain the above copyright
14	* notice, this list of conditions and the following disclaimer.
15	*
16	* 2. Redistributions in binary form must reproduce the above copyright
17	* notice, this list of conditions and the following disclaimer in
18	* the documentation and/or other materials provided with the
19	* distribution.
20	*
21	* 3. All advertising materials mentioning features or use of this
22	* software must display the following acknowledgment:
23	* "This product includes software developed by the OpenSSL Project
24	* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25	*
26	* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27	* endorse or promote products derived from this software without
28	* prior written permission. For written permission, please contact
29	* licensing@OpenSSL.org.
30	*
31	* 5. Products derived from this software may not be called "OpenSSL"
32	* nor may "OpenSSL" appear in their names without prior written
33	* permission of the OpenSSL Project.
34	*
35	* 6. Redistributions of any form whatsoever must retain the following
36	* acknowledgment:
37	* "This product includes software developed by the OpenSSL Project
38	* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39	*
40	* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41	* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44	* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51	* OF THE POSSIBILITY OF SUCH DAMAGE.
52	* ====================================================================
53	*/
54
55	#include "cryptlib.h"
56	#include <openssl/asn1t.h>
57	#include <openssl/pem.h>
58	#include <openssl/x509v3.h>
59	#include <openssl/err.h>
60	#include <openssl/cms.h>
61	#include <openssl/rand.h>
62	#include "cms_lcl.h"
63
64	/* CMS EncryptedData Utilities */
65
66	DECLARE_ASN1_ITEM(CMS_EncryptedData)
67
68	/* Return BIO based on EncryptedContentInfo and key */
69
70	BIO cms_EncryptedContent_init_bio(CMS_EncryptedContentInfo ec)
71	{
72	BIO *b;
73	EVP_CIPHER_CTX *ctx;
74	const EVP_CIPHER *ciph;
75	X509_ALGOR *calg = ec->contentEncryptionAlgorithm;
76	unsigned char iv[EVP_MAX_IV_LENGTH], *piv = NULL;
77	unsigned char *tkey = NULL;
78	size_t tkeylen = 0;
79
80	int ok = 0;
81
82	int enc, keep_key = 0;
83
84	enc = ec->cipher ? 1 : 0;
85
86	b = BIO_new(BIO_f_cipher());
87	if (!b) {
88	CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO, ERR_R_MALLOC_FAILURE);
89	return NULL;
90	}
91
92	BIO_get_cipher_ctx(b, &ctx);
93
94	if (enc) {
95	ciph = ec->cipher;
96	/*
97	* If not keeping key set cipher to NULL so subsequent calls decrypt.
98	*/
99	if (ec->key)
100	ec->cipher = NULL;
101	} else {
102	ciph = EVP_get_cipherbyobj(calg->algorithm);
103
104	if (!ciph) {
105	CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO, CMS_R_UNKNOWN_CIPHER);
106	goto err;
107	}
108	}
109
110	if (EVP_CipherInit_ex(ctx, ciph, NULL, NULL, NULL, enc) <= 0) {
111	CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
112	CMS_R_CIPHER_INITIALISATION_ERROR);
113	goto err;
114	}
115
116	if (enc) {
117	int ivlen;
118	calg->algorithm = OBJ_nid2obj(EVP_CIPHER_CTX_type(ctx));
119	/* Generate a random IV if we need one */
120	ivlen = EVP_CIPHER_CTX_iv_length(ctx);
121	if (ivlen > 0) {
122	if (RAND_bytes(iv, ivlen) <= 0)
123	goto err;
124	piv = iv;
125	}
126	} else if (EVP_CIPHER_asn1_to_param(ctx, calg->parameter) <= 0) {
127	CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
128	CMS_R_CIPHER_PARAMETER_INITIALISATION_ERROR);
129	goto err;
130	}
131	tkeylen = EVP_CIPHER_CTX_key_length(ctx);
132	/* Generate random session key */
133	if (!enc \|\| !ec->key) {
134	tkey = OPENSSL_malloc(tkeylen);
135	if (!tkey) {
136	CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO, ERR_R_MALLOC_FAILURE);
137	goto err;
138	}
139	if (EVP_CIPHER_CTX_rand_key(ctx, tkey) <= 0)
140	goto err;
141	}
142
143	if (!ec->key) {
144	ec->key = tkey;
145	ec->keylen = tkeylen;
146	tkey = NULL;
147	if (enc)
148	keep_key = 1;
149	else
150	ERR_clear_error();
151
152	}
153
154	if (ec->keylen != tkeylen) {
155	/* If necessary set key length */
156	if (EVP_CIPHER_CTX_set_key_length(ctx, ec->keylen) <= 0) {
157	/*
158	* Only reveal failure if debugging so we don't leak information
159	* which may be useful in MMA.
160	*/
161	if (enc \|\| ec->debug) {
162	CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
163	CMS_R_INVALID_KEY_LENGTH);
164	goto err;
165	} else {
166	/* Use random key */
167	OPENSSL_cleanse(ec->key, ec->keylen);
168	OPENSSL_free(ec->key);
169	ec->key = tkey;
170	ec->keylen = tkeylen;
171	tkey = NULL;
172	ERR_clear_error();
173	}
174	}
175	}
176
177	if (EVP_CipherInit_ex(ctx, NULL, NULL, ec->key, piv, enc) <= 0) {
178	CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
179	CMS_R_CIPHER_INITIALISATION_ERROR);
180	goto err;
181	}
182	if (enc) {
183	calg->parameter = ASN1_TYPE_new();
184	if (calg->parameter == NULL) {
185	CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO, ERR_R_MALLOC_FAILURE);
186	goto err;
187	}
188	if (EVP_CIPHER_param_to_asn1(ctx, calg->parameter) <= 0) {
189	CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
190	CMS_R_CIPHER_PARAMETER_INITIALISATION_ERROR);
191	goto err;
192	}
193	/* If parameter type not set omit parameter */
194	if (calg->parameter->type == V_ASN1_UNDEF) {
195	ASN1_TYPE_free(calg->parameter);
196	calg->parameter = NULL;
197	}
198	}
199	ok = 1;
200
201	err:
202	if (ec->key && (!keep_key \|\| !ok)) {
203	OPENSSL_cleanse(ec->key, ec->keylen);
204	OPENSSL_free(ec->key);
205	ec->key = NULL;
206	}
207	if (tkey) {
208	OPENSSL_cleanse(tkey, tkeylen);
209	OPENSSL_free(tkey);
210	}
211	if (ok)
212	return b;
213	BIO_free(b);
214	return NULL;
215	}
216
217	int cms_EncryptedContent_init(CMS_EncryptedContentInfo *ec,
218	const EVP_CIPHER *cipher,
219	const unsigned char *key, size_t keylen)
220	{
221	ec->cipher = cipher;
222	if (key) {
223	ec->key = OPENSSL_malloc(keylen);
224	if (!ec->key)
225	return 0;
226	memcpy(ec->key, key, keylen);
227	}
228	ec->keylen = keylen;
229	if (cipher)
230	ec->contentType = OBJ_nid2obj(NID_pkcs7_data);
231	return 1;
232	}
233
234	int CMS_EncryptedData_set1_key(CMS_ContentInfo cms, const EVP_CIPHER ciph,
235	const unsigned char *key, size_t keylen)
236	{
237	CMS_EncryptedContentInfo *ec;
238	if (!key \|\| !keylen) {
239	CMSerr(CMS_F_CMS_ENCRYPTEDDATA_SET1_KEY, CMS_R_NO_KEY);
240	return 0;
241	}
242	if (ciph) {
243	cms->d.encryptedData = M_ASN1_new_of(CMS_EncryptedData);
244	if (!cms->d.encryptedData) {
245	CMSerr(CMS_F_CMS_ENCRYPTEDDATA_SET1_KEY, ERR_R_MALLOC_FAILURE);
246	return 0;
247	}
248	cms->contentType = OBJ_nid2obj(NID_pkcs7_encrypted);
249	cms->d.encryptedData->version = 0;
250	} else if (OBJ_obj2nid(cms->contentType) != NID_pkcs7_encrypted) {
251	CMSerr(CMS_F_CMS_ENCRYPTEDDATA_SET1_KEY, CMS_R_NOT_ENCRYPTED_DATA);
252	return 0;
253	}
254	ec = cms->d.encryptedData->encryptedContentInfo;
255	return cms_EncryptedContent_init(ec, ciph, key, keylen);
256	}
257
258	BIO cms_EncryptedData_init_bio(CMS_ContentInfo cms)
259	{
260	CMS_EncryptedData *enc = cms->d.encryptedData;
261	if (enc->encryptedContentInfo->cipher && enc->unprotectedAttrs)
262	enc->version = 2;
263	return cms_EncryptedContent_init_bio(enc->encryptedContentInfo);
264	}