1CMS_GET0_RECIPIENTINFOS(3) OpenSSL CMS_GET0_RECIPIENTINFOS(3)
2
6 CMS_get0_RecipientInfos, CMS_RecipientInfo_type,
7 CMS_RecipientInfo_ktri_get0_signer_id, CMS_RecipientInfo_ktri_cert_cmp,
8 CMS_RecipientInfo_set0_pkey, CMS_RecipientInfo_kekri_get0_id,
9 CMS_RecipientInfo_kekri_id_cmp, CMS_RecipientInfo_set0_key,
10 CMS_RecipientInfo_decrypt, CMS_RecipientInfo_encrypt - CMS
11 envelopedData RecipientInfo routines
12
14 #include <openssl/cms.h>
15 STACK_OF(CMS_RecipientInfo) *CMS_get0_RecipientInfos(CMS_ContentInfo *cms);
17 int CMS_RecipientInfo_type(CMS_RecipientInfo *ri);
18 int CMS_RecipientInfo_ktri_get0_signer_id(CMS_RecipientInfo *ri,
20 ASN1_OCTET_STRING **keyid,
21 X509_NAME **issuer,
22 ASN1_INTEGER **sno);
23 int CMS_RecipientInfo_ktri_cert_cmp(CMS_RecipientInfo *ri, X509 *cert);
24 int CMS_RecipientInfo_set0_pkey(CMS_RecipientInfo *ri, EVP_PKEY *pkey);
25 int CMS_RecipientInfo_kekri_get0_id(CMS_RecipientInfo *ri, X509_ALGOR **palg,
27 ASN1_OCTET_STRING **pid,
28 ASN1_GENERALIZEDTIME **pdate,
29 ASN1_OBJECT **potherid,
30 ASN1_TYPE **pothertype);
31 int CMS_RecipientInfo_kekri_id_cmp(CMS_RecipientInfo *ri,
32 const unsigned char *id, size_t idlen);
33 int CMS_RecipientInfo_set0_key(CMS_RecipientInfo *ri,
34 unsigned char *key, size_t keylen);
35 int CMS_RecipientInfo_decrypt(CMS_ContentInfo *cms, CMS_RecipientInfo *ri);
37 int CMS_RecipientInfo_encrypt(CMS_ContentInfo *cms, CMS_RecipientInfo *ri);
38
40 The function CMS_get0_RecipientInfos() returns all the
41 CMS_RecipientInfo structures associated with a CMS EnvelopedData
42 structure.
43 CMS_RecipientInfo_type() returns the type of CMS_RecipientInfo
45 structure ri. It will currently return CMS_RECIPINFO_TRANS,
46 CMS_RECIPINFO_AGREE, CMS_RECIPINFO_KEK, CMS_RECIPINFO_PASS, or
47 CMS_RECIPINFO_OTHER.
48 CMS_RecipientInfo_ktri_get0_signer_id() retrieves the certificate
50 recipient identifier associated with a specific CMS_RecipientInfo
51 structure ri, which must be of type CMS_RECIPINFO_TRANS. Either the
52 keyidentifier will be set in keyid or both issuer name and serial
53 number in issuer and sno.
54 CMS_RecipientInfo_ktri_cert_cmp() compares the certificate cert against
56 the CMS_RecipientInfo structure ri, which must be of type
57 CMS_RECIPINFO_TRANS. It returns zero if the comparison is successful
58 and non zero if not.
59 CMS_RecipientInfo_set0_pkey() associates the private key pkey with the
61 CMS_RecipientInfo structure ri, which must be of type
62 CMS_RECIPINFO_TRANS.
63 CMS_RecipientInfo_kekri_get0_id() retrieves the key information from
65 the CMS_RecipientInfo structure ri which must be of type
66 CMS_RECIPINFO_KEK. Any of the remaining parameters can be NULL if the
67 application is not interested in the value of a field. Where a field is
68 optional and absent NULL will be written to the corresponding
69 parameter. The keyEncryptionAlgorithm field is written to palg, the
70 keyIdentifier field is written to pid, the date field if present is
71 written to pdate, if the other field is present the components
72 keyAttrId and keyAttr are written to parameters potherid and
73 pothertype.
74 CMS_RecipientInfo_kekri_id_cmp() compares the ID in the id and idlen
76 parameters against the keyIdentifier CMS_RecipientInfo structure ri,
77 which must be of type CMS_RECIPINFO_KEK. It returns zero if the
78 comparison is successful and non zero if not.
79 CMS_RecipientInfo_set0_key() associates the symmetric key key of length
81 keylen with the CMS_RecipientInfo structure ri, which must be of type
82 CMS_RECIPINFO_KEK.
83 CMS_RecipientInfo_decrypt() attempts to decrypt CMS_RecipientInfo
85 structure ri in structure cms. A key must have been associated with the
86 structure first.
87 CMS_RecipientInfo_encrypt() attempts to encrypt CMS_RecipientInfo
89 structure ri in structure cms. A key must have been associated with the
90 structure first and the content encryption key must be available: for
91 example by a previous call to CMS_RecipientInfo_decrypt().
92
94 The main purpose of these functions is to enable an application to
95 lookup recipient keys using any appropriate technique when the simpler
96 method of CMS_decrypt() is not appropriate.
97 In typical usage and application will retrieve all CMS_RecipientInfo
99 structures using CMS_get0_RecipientInfos() and check the type of each
100 using CMS_RecipientInfo_type(). Depending on the type the
101 CMS_RecipientInfo structure can be ignored or its key identifier data
102 retrieved using an appropriate function. Then if the corresponding
103 secret or private key can be obtained by any appropriate means it can
104 then associated with the structure and CMS_RecipientInfo_decrypt()
105 called. If successful CMS_decrypt() can be called with a NULL key to
106 decrypt the enveloped content.
107 The CMS_RecipientInfo_encrypt() can be used to add a new recipient to
109 an existing enveloped data structure. Typically an application will
110 first decrypt an appropriate CMS_RecipientInfo structure to make the
111 content encrypt key available, it will then add a new recipient using a
112 function such as CMS_add1_recipient_cert() and finally encrypt the
113 content encryption key using CMS_RecipientInfo_encrypt().
114
116 CMS_get0_RecipientInfos() returns all CMS_RecipientInfo structures, or
117 NULL if an error occurs.
118 CMS_RecipientInfo_ktri_get0_signer_id(), CMS_RecipientInfo_set0_pkey(),
120 CMS_RecipientInfo_kekri_get0_id(), CMS_RecipientInfo_set0_key() and
121 CMS_RecipientInfo_decrypt() return 1 for success or 0 if an error
122 occurs. CMS_RecipientInfo_encrypt() return 1 for success or 0 if an
123 error occurs.
124 CMS_RecipientInfo_ktri_cert_cmp() and CMS_RecipientInfo_kekri_cmp()
126 return 0 for a successful comparison and non zero otherwise.
127 Any error can be obtained from ERR_get_error(3).
129
131 ERR_get_error(3), CMS_decrypt(3)
132
134 Copyright 2008-2016 The OpenSSL Project Authors. All Rights Reserved.
135 Licensed under the OpenSSL license (the "License"). You may not use
137 this file except in compliance with the License. You can obtain a copy
138 in the file LICENSE in the source distribution or at
139 <https://www.openssl.org/source/license.html>.
1401.1.1l 2021-09-15 CMS_GET0_RECIPIENTINFOS(3)