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
 #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);
In the description below, TYPE is used as a placeholder for any of the
  OpenSSL datatypes, such as X509. The macro DECLARE_PEM_rw
  expands to the set of declarations shown in the next four lines of the
  synopsis.
These routines convert between local instances of ASN1 datatypes
    and the PEM encoding. For more information on the templates, see
    ASN1_ITEM(3). For more information on the lower-level routines used
    by the functions here, see PEM_read(3).
PEM_read_TYPE() reads a PEM-encoded object of TYPE
    from the file fp and returns it. The cb and u
    parameters are as described in pem_password_cb(3).
PEM_read_bio_TYPE() is similar to PEM_read_TYPE()
    but reads from the BIO bp.
PEM_write_TYPE() writes the PEM encoding of the object
    a to the file fp.
PEM_write_bio_TYPE() similarly writes to the BIO
  bp.
These functions make no assumption regarding the pass phrase received from the
  password callback. It will simply be treated as a byte sequence.
PEM_read_TYPE() and PEM_read_bio_TYPE() return a pointer to an
  allocated object, which should be released by calling TYPE_free(), or
  NULL on error.
PEM_write_TYPE() and PEM_write_bio_TYPE() return the
    number of bytes written or zero on error.
PEM_read(3), passphrase-encoding(7)
Copyright 1998-2018 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the OpenSSL license (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>.