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+.\" -*- mode: troff; coding: utf-8 -*-
+.\" Automatically generated by Pod::Man 5.0102 (Pod::Simple 3.45)
+.\"
+.\" Standard preamble:
+.\" ========================================================================
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+.\"
+.\" 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'.
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+.        if !\nF==2 \{\
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+.\}
+.rr rF
+.\" ========================================================================
+.\"
+.IX Title "PKCS7_DECRYPT 3ossl"
+.TH PKCS7_DECRYPT 3ossl 2025-09-16 3.5.3 OpenSSL
+.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
+.\" way too many mistakes in technical documents.
+.if n .ad l
+.nh
+.SH NAME
+PKCS7_decrypt \- decrypt content from a PKCS#7 envelopedData structure
+.SH SYNOPSIS
+.IX Header "SYNOPSIS"
+.Vb 1
+\& #include <openssl/pkcs7.h>
+\&
+\& int PKCS7_decrypt(PKCS7 *p7, EVP_PKEY *pkey, X509 *cert, BIO *data, int flags);
+.Ve
+.SH DESCRIPTION
+.IX Header "DESCRIPTION"
+\&\fBPKCS7_decrypt()\fR extracts and decrypts the content from a PKCS#7 envelopedData
+structure. \fBpkey\fR is the private key of the recipient, \fBcert\fR is the
+recipients certificate, \fBdata\fR is a BIO to write the content to and
+\&\fBflags\fR is an optional set of flags.
+.SH NOTES
+.IX 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.
+.PP
+The following flags can be passed in the \fBflags\fR parameter.
+.PP
+If the \fBPKCS7_TEXT\fR flag is set MIME headers for type \fBtext/plain\fR are deleted
+from the content. If the content is not of type \fBtext/plain\fR then an error is
+returned.
+.SH "RETURN VALUES"
+.IX Header "RETURN VALUES"
+\&\fBPKCS7_decrypt()\fR returns either 1 for success or 0 for failure.
+The error can be obtained from \fBERR_get_error\fR\|(3)
+.SH BUGS
+.IX Header "BUGS"
+\&\fBPKCS7_decrypt()\fR 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.
+.PP
+The lack of single pass processing and need to hold all data in memory as
+mentioned in \fBPKCS7_sign()\fR also applies to \fBPKCS7_verify()\fR.
+.SH "SEE ALSO"
+.IX Header "SEE ALSO"
+\&\fBERR_get_error\fR\|(3), \fBPKCS7_encrypt\fR\|(3)
+.SH COPYRIGHT
+.IX Header "COPYRIGHT"
+Copyright 2002\-2016 The OpenSSL Project Authors. All Rights Reserved.
+.PP
+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>.