5 CMS_EncryptedData_decrypt, CMS_EnvelopedData_decrypt
6 - Decrypt CMS EncryptedData or EnvelopedData
10 #include <openssl/cms.h>
12 int CMS_EncryptedData_decrypt(CMS_ContentInfo *cms,
13 const unsigned char *key, size_t keylen,
14 BIO *dcont, BIO *out, unsigned int flags);
16 BIO *CMS_EnvelopedData_decrypt(CMS_EnvelopedData *env, BIO *detached_data,
17 EVP_PKEY *pkey, X509 *cert,
18 ASN1_OCTET_STRING *secret, unsigned int flags,
19 OSSL_LIB_CTX *libctx, const char *propq);
23 CMS_EncryptedData_decrypt() decrypts a I<cms> EncryptedData object using the
24 symmetric I<key> of size I<keylen> bytes. I<out> is a BIO to write the content
25 to and I<flags> is an optional set of flags.
26 I<dcont> is used in the rare case where the encrypted content is detached. It
27 will normally be set to NULL.
29 The following flags can be passed in the I<flags> parameter.
31 If the B<CMS_TEXT> flag is set MIME headers for type C<text/plain> are deleted
32 from the content. If the content is not of type C<text/plain> then an error is
35 CMS_EnvelopedData_decrypt() decrypts, similarly to CMS_decrypt(3),
36 a CMS EnvelopedData object I<env> using the symmetric key I<secret> if it
37 is not NULL, otherwise the private key of the recipient I<pkey>.
38 If I<pkey> is given, it is recommended to provide also the associated
39 certificate in I<cert> - see L<CMS_decrypt(3)> and the NOTES on I<cert> there.
40 The optional parameters I<flags> and I<dcont> are used as described above.
41 The optional parameters library context I<libctx> and property query I<propq>
42 are used when retrieving algorithms from providers.
46 CMS_EncryptedData_decrypt() returns 0 if an error occurred otherwise returns 1.
48 CMS_EnvelopedData_decrypt() returns NULL if an error occurred,
49 otherwise a BIO containing the decypted content.
53 L<ERR_get_error(3)>, L<CMS_EncryptedData_encrypt(3)>, L<CMS_decrypt(3)>
57 CMS_EnvelopedData_decrypt() was added in OpenSSL 3.2.
61 Copyright 2020 The OpenSSL Project Authors. All Rights Reserved.
63 Licensed under the Apache License 2.0 (the "License"). You may not use
64 this file except in compliance with the License. You can obtain a copy
65 in the file LICENSE in the source distribution or at
66 L<https://www.openssl.org/source/license.html>.