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.\"
.IX Title "PEM_READ_CMS 3"
.TH PEM_READ_CMS 3 "2023-09-11" "1.1.1w" "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"
DECLARE_PEM_rw, PEM_read_CMS, PEM_read_bio_CMS, PEM_write_CMS, PEM_write_bio_CMS, PEM_write_DHxparams, PEM_write_bio_DHxparams, PEM_read_ECPKParameters, PEM_read_bio_ECPKParameters, PEM_write_ECPKParameters, PEM_write_bio_ECPKParameters, PEM_read_ECPrivateKey, PEM_write_ECPrivateKey, PEM_write_bio_ECPrivateKey, PEM_read_EC_PUBKEY, PEM_read_bio_EC_PUBKEY, PEM_write_EC_PUBKEY, PEM_write_bio_EC_PUBKEY, PEM_read_NETSCAPE_CERT_SEQUENCE, PEM_read_bio_NETSCAPE_CERT_SEQUENCE, PEM_write_NETSCAPE_CERT_SEQUENCE, PEM_write_bio_NETSCAPE_CERT_SEQUENCE, PEM_read_PKCS8, PEM_read_bio_PKCS8, PEM_write_PKCS8, PEM_write_bio_PKCS8, PEM_write_PKCS8_PRIV_KEY_INFO, PEM_read_bio_PKCS8_PRIV_KEY_INFO, PEM_read_PKCS8_PRIV_KEY_INFO, PEM_write_bio_PKCS8_PRIV_KEY_INFO, PEM_read_SSL_SESSION, PEM_read_bio_SSL_SESSION, PEM_write_SSL_SESSION, PEM_write_bio_SSL_SESSION \&\- PEM object encoding routines
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/pem.h>
\&
\& DECLARE_PEM_rw(name, TYPE)
\&
\& TYPE *PEM_read_TYPE(FILE *fp, TYPE **a, pem_password_cb *cb, void *u);
\& TYPE *PEM_read_bio_TYPE(BIO *bp, TYPE **a, pem_password_cb *cb, void *u);
\& int PEM_write_TYPE(FILE *fp, const TYPE *a);
\& int PEM_write_bio_TYPE(BIO *bp, const TYPE *a);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
In the description below, \fI\s-1TYPE\s0\fR is used
as a placeholder for any of the OpenSSL datatypes, such as \fIX509\fR.
The macro \fBDECLARE_PEM_rw\fR expands to the set of declarations shown in
the next four lines of the synopsis.
.PP
These routines convert between local instances of \s-1ASN1\s0 datatypes and
the \s-1PEM\s0 encoding. For more information on the templates, see
\&\s-1\fBASN1_ITEM\s0\fR\|(3). For more information on the lower-level routines used
by the functions here, see \fBPEM_read\fR\|(3).
.PP
\&\fBPEM_read_TYPE()\fR reads a PEM-encoded object of \fI\s-1TYPE\s0\fR from the file \fBfp\fR
and returns it. The \fBcb\fR and \fBu\fR parameters are as described in
\&\fBpem_password_cb\fR\|(3).
.PP
\&\fBPEM_read_bio_TYPE()\fR is similar to \fBPEM_read_TYPE()\fR but reads from the \s-1BIO\s0 \fBbp\fR.
.PP
\&\fBPEM_write_TYPE()\fR writes the \s-1PEM\s0 encoding of the object \fBa\fR to the file \fBfp\fR.
.PP
\&\fBPEM_write_bio_TYPE()\fR similarly writes to the \s-1BIO\s0 \fBbp\fR.
.SH "NOTES"
.IX Header "NOTES"
These functions make no assumption regarding the pass phrase received from the
password callback.
It will simply be treated as a byte sequence.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fBPEM_read_TYPE()\fR and \fBPEM_read_bio_TYPE()\fR return a pointer to an allocated
object, which should be released by calling \fBTYPE_free()\fR, or \s-1NULL\s0 on error.
.PP
\&\fBPEM_write_TYPE()\fR and \fBPEM_write_bio_TYPE()\fR return the number of bytes written
or zero on error.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBPEM_read\fR\|(3),
\&\fBpassphrase\-encoding\fR\|(7)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 1998\-2018 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.
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