-*- mode: troff; coding: utf-8 -*-
Automatically generated by Pod::Man v6.0.2 (Pod::Simple 3.45)

Standard preamble:
========================================================================
..

..

.. \*(C` and \*(C' are quotes in nroff, nothing in troff, for use with C<>.
. ds C` "" . ds C' "" 'br\} . ds C` . ds C' 'br\}
Escape single quotes in literal strings from groff's Unicode transform.

If the F register is >0, we'll generate index entries on stderr for
titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
entries marked with X<> in POD. Of course, you'll have to process the
output yourself in some meaningful fashion.

Avoid warning from groff about undefined register 'F'.
.. .nr rF 0 . if \nF \{\ . de IX . tm Index:\\$1\t\\n%\t"\\$2" .. . if !\nF==2 \{\ . nr % 0 . nr F 2 . \} . \} .\} .rr rF
Required to disable full justification in groff 1.23.0.
========================================================================

Title "PKCS7_DECRYPT 3ossl" For nroff, turn off justification. Always turn off hyphenation; it makes
way too many mistakes in technical documents.
PKCS7_decrypt - decrypt content from a PKCS#7 envelopedData structure Header "SYNOPSIS" .Vb 1 #include <openssl/pkcs7.h> \& int PKCS7_decrypt(PKCS7 *p7, EVP_PKEY *pkey, X509 *cert, BIO *data, int flags); .Ve Header "DESCRIPTION" \fBPKCS7_decrypt() extracts and decrypts the content from a PKCS#7 envelopedData structure. pkey is the private key of the recipient, cert is the recipients certificate, data is a BIO to write the content to and \fBflags is an optional set of flags. Header "NOTES" Although the recipients certificate is not needed to decrypt the data it is needed to locate the appropriate (of possible several) recipients in the PKCS#7 structure.

When RSA PKCS#1 v1.5 Key Transport is in use, the invoked EVP_PKEY_decrypt() will use implicit rejection mechanism. It always returns the result of RSA decryption of the symmetric key to avoid Marvin attack. This result is deterministic and can happen to match the symmetric cipher used for the content encryption. In case when the certificate is not provided, the last RecipientInfo producing the key looking valid will be used. It may cause getting garbage content on decryption.

The following flags can be passed in the flags parameter.

If the PKCS7_TEXT flag is set MIME headers for type text/plain are deleted from the content. If the content is not of type text/plain then an error is returned.

Header "RETURN VALUES" \fBPKCS7_decrypt() returns either 1 for success or 0 for failure. The error can be obtained from ERR_get_error\|(3) Header "BUGS" \fBPKCS7_decrypt() must be passed the correct recipient key and certificate. It would be better if it could look up the correct key and certificate from a database. Header "SEE ALSO" \fBERR_get_error\|(3), PKCS7_encrypt\|(3), EVP_PKEY_decrypt\|(3) Header "COPYRIGHT" Copyright 2002-2026 The OpenSSL Project Authors. All Rights Reserved.

Licensed under the Apache License 2.0 (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at <https://www.openssl.org/source/license.html>.