1 /* crypto/cms/cms_env.c */
2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
5 /* ====================================================================
6 * Copyright (c) 2008 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 * ====================================================================
55 #include <openssl/asn1t.h>
56 #include <openssl/pem.h>
57 #include <openssl/x509v3.h>
58 #include <openssl/err.h>
59 #include <openssl/cms.h>
60 #include <openssl/rand.h>
62 #include "asn1_locl.h"
64 /* CMS EnvelopedData Utilities */
66 DECLARE_ASN1_ITEM(CMS_EnvelopedData)
67 DECLARE_ASN1_ITEM(CMS_RecipientInfo)
68 DECLARE_ASN1_ITEM(CMS_KeyTransRecipientInfo)
70 DECLARE_STACK_OF(CMS_RecipientInfo)
72 static CMS_EnvelopedData *cms_get0_enveloped(CMS_ContentInfo *cms)
74 if (OBJ_obj2nid(cms->contentType) != NID_pkcs7_enveloped)
76 CMSerr(CMS_F_CMS_GET0_ENVELOPED,
77 CMS_R_CONTENT_TYPE_NOT_ENVELOPED_DATA);
80 return cms->d.envelopedData;
83 static CMS_EnvelopedData *cms_enveloped_data_init(CMS_ContentInfo *cms)
85 if (cms->d.other == NULL)
87 cms->d.envelopedData = M_ASN1_new_of(CMS_EnvelopedData);
88 if (!cms->d.envelopedData)
90 CMSerr(CMS_F_CMS_ENVELOPED_DATA_INIT,
91 ERR_R_MALLOC_FAILURE);
94 cms->d.envelopedData->version = 0;
95 cms->d.envelopedData->encryptedContentInfo->contentType =
96 OBJ_nid2obj(NID_pkcs7_data);
97 ASN1_OBJECT_free(cms->contentType);
98 cms->contentType = OBJ_nid2obj(NID_pkcs7_enveloped);
99 return cms->d.envelopedData;
101 return cms_get0_enveloped(cms);
104 STACK_OF(CMS_RecipientInfo) *CMS_get0_RecipientInfos(CMS_ContentInfo *cms)
106 CMS_EnvelopedData *env;
107 env = cms_enveloped_data_init(cms);
110 return env->recipientInfos;
113 int CMS_RecipientInfo_type(CMS_RecipientInfo *ri)
118 /* Add a recipient certificate. For now only handle key transport.
119 * If we ever handle key agreement will need updating.
122 CMS_RecipientInfo *CMS_add1_recipient_cert(CMS_ContentInfo *cms,
123 X509 *recip, unsigned int flags)
125 CMS_RecipientInfo *ri = NULL;
126 CMS_KeyTransRecipientInfo *ktri;
127 CMS_EnvelopedData *env;
130 /* Init enveloped data */
131 env = cms_enveloped_data_init(cms);
135 /* Initialized recipient info */
136 ri = M_ASN1_new_of(CMS_RecipientInfo);
140 /* Initialize and add key transrport recipient info */
142 ri->d.ktri = M_ASN1_new_of(CMS_KeyTransRecipientInfo);
145 ri->type = CMS_RECIPINFO_TRANS;
149 X509_check_purpose(recip, -1, -1);
150 pk = X509_get_pubkey(recip);
153 CMSerr(CMS_F_CMS_ADD1_RECIPIENT_CERT,
154 CMS_R_ERROR_GETTING_PUBLIC_KEY);
157 CRYPTO_add(&recip->references, 1, CRYPTO_LOCK_X509);
158 CRYPTO_add(&pk->references, 1, CRYPTO_LOCK_EVP_PKEY);
162 if (flags & CMS_USE_KEYID)
165 type = CMS_RECIPINFO_KEYIDENTIFIER;
170 type = CMS_RECIPINFO_ISSUER_SERIAL;
173 /* Not a typo: RecipientIdentifier and SignerIdentifier are the
177 if (!cms_set1_SignerIdentifier(ktri->rid, recip, type))
180 if (pk->ameth && pk->ameth->pkey_ctrl)
182 i = pk->ameth->pkey_ctrl(pk, ASN1_PKEY_CTRL_CMS_ENVELOPE,
186 CMSerr(CMS_F_CMS_ADD1_RECIPIENT_CERT,
187 CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
192 CMSerr(CMS_F_CMS_ADD1_RECIPIENT_CERT,
198 if (!sk_CMS_RecipientInfo_push(env->recipientInfos, ri))
204 CMSerr(CMS_F_CMS_ADD1_RECIPIENT_CERT, ERR_R_MALLOC_FAILURE);
207 M_ASN1_free_of(ri, CMS_RecipientInfo);
212 int CMS_RecipientInfo_ktri_get0_algs(CMS_RecipientInfo *ri,
213 EVP_PKEY **pk, X509 **recip,
216 CMS_KeyTransRecipientInfo *ktri;
217 if (ri->type != CMS_RECIPINFO_TRANS)
219 CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_GET0_ALGS,
220 CMS_R_NOT_KEY_TRANSPORT);
229 *recip = ktri->recip;
231 *palg = ktri->keyEncryptionAlgorithm;
235 int CMS_RecipientInfo_ktri_get0_signer_id(CMS_RecipientInfo *ri,
236 ASN1_OCTET_STRING **keyid,
237 X509_NAME **issuer, ASN1_INTEGER **sno)
239 CMS_KeyTransRecipientInfo *ktri;
240 if (ri->type != CMS_RECIPINFO_TRANS)
242 CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_GET0_SIGNER_ID,
243 CMS_R_NOT_KEY_TRANSPORT);
248 return cms_SignerIdentifier_get0_signer_id(ktri->rid,
252 int CMS_RecipientInfo_ktri_cert_cmp(CMS_RecipientInfo *ri, X509 *cert)
254 if (ri->type != CMS_RECIPINFO_TRANS)
256 CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_CERT_CMP,
257 CMS_R_NOT_KEY_TRANSPORT);
261 return cms_SignerIdentifier_cert_cmp(ri->d.ktri->rid, cert);
264 int CMS_RecipientInfo_decrypt(CMS_ContentInfo *cms, CMS_RecipientInfo *ri,
267 CMS_KeyTransRecipientInfo *ktri;
268 EVP_PKEY_CTX *pctx = NULL;
269 unsigned char *ek = NULL;
274 if (ri->type != CMS_RECIPINFO_TRANS)
276 CMSerr(CMS_F_CMS_RECIPIENTINFO_DECRYPT,
277 CMS_R_NOT_KEY_TRANSPORT);
282 pctx = EVP_PKEY_CTX_new(pkey, NULL);
286 if (EVP_PKEY_decrypt_init(pctx) <= 0)
289 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_DECRYPT,
290 EVP_PKEY_CTRL_CMS_DECRYPT, 0, ri) <= 0)
292 CMSerr(CMS_F_CMS_RECIPIENTINFO_DECRYPT, CMS_R_CTRL_ERROR);
296 if (EVP_PKEY_decrypt(pctx, NULL, &eklen,
297 ktri->encryptedKey->data,
298 ktri->encryptedKey->length) <= 0)
301 ek = OPENSSL_malloc(eklen);
305 CMSerr(CMS_F_CMS_RECIPIENTINFO_DECRYPT, ERR_R_MALLOC_FAILURE);
309 if (EVP_PKEY_decrypt(pctx, ek, &eklen,
310 ktri->encryptedKey->data,
311 ktri->encryptedKey->length) <= 0)
313 CMSerr(CMS_F_CMS_RECIPIENTINFO_DECRYPT, CMS_R_CMS_LIB);
319 cms->d.envelopedData->encryptedContentInfo->key = ek;
320 cms->d.envelopedData->encryptedContentInfo->keylen = eklen;
324 EVP_PKEY_CTX_free(pctx);
331 BIO *cms_EnvelopedData_init_bio(CMS_ContentInfo *cms)
333 CMS_EncryptedContentInfo *ec;
334 ec = cms->d.envelopedData->encryptedContentInfo;
335 return cms_EncryptedContent_init_bio(ec);