mirror of https://github.com/openssl/openssl.git
206 lines
9.9 KiB
Plaintext
206 lines
9.9 KiB
Plaintext
=pod
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=head1 NAME
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SSL_CTX_use_certificate, SSL_CTX_use_certificate_ASN1,
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SSL_CTX_use_certificate_file, SSL_use_certificate, SSL_use_certificate_ASN1,
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SSL_use_certificate_file, SSL_CTX_use_certificate_chain_file,
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SSL_use_certificate_chain_file,
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SSL_CTX_use_PrivateKey, SSL_CTX_use_PrivateKey_ASN1,
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SSL_CTX_use_PrivateKey_file, SSL_CTX_use_RSAPrivateKey,
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SSL_CTX_use_RSAPrivateKey_ASN1, SSL_CTX_use_RSAPrivateKey_file,
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SSL_use_PrivateKey_file, SSL_use_PrivateKey_ASN1, SSL_use_PrivateKey,
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SSL_use_RSAPrivateKey, SSL_use_RSAPrivateKey_ASN1,
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SSL_use_RSAPrivateKey_file, SSL_CTX_check_private_key, SSL_check_private_key,
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SSL_CTX_use_cert_and_key, SSL_use_cert_and_key
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- load certificate and key data
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=head1 SYNOPSIS
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#include <openssl/ssl.h>
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int SSL_CTX_use_certificate(SSL_CTX *ctx, X509 *x);
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int SSL_CTX_use_certificate_ASN1(SSL_CTX *ctx, int len, const unsigned char *d);
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int SSL_CTX_use_certificate_file(SSL_CTX *ctx, const char *file, int type);
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int SSL_use_certificate(SSL *ssl, X509 *x);
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int SSL_use_certificate_ASN1(SSL *ssl, const unsigned char *d, int len);
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int SSL_use_certificate_file(SSL *ssl, const char *file, int type);
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int SSL_CTX_use_certificate_chain_file(SSL_CTX *ctx, const char *file);
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int SSL_use_certificate_chain_file(SSL *ssl, const char *file);
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int SSL_CTX_use_PrivateKey(SSL_CTX *ctx, EVP_PKEY *pkey);
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int SSL_CTX_use_PrivateKey_ASN1(int pk, SSL_CTX *ctx, const unsigned char *d,
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long len);
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int SSL_CTX_use_PrivateKey_file(SSL_CTX *ctx, const char *file, int type);
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int SSL_CTX_use_RSAPrivateKey(SSL_CTX *ctx, RSA *rsa);
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int SSL_CTX_use_RSAPrivateKey_ASN1(SSL_CTX *ctx, const unsigned char *d, long len);
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int SSL_CTX_use_RSAPrivateKey_file(SSL_CTX *ctx, const char *file, int type);
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int SSL_use_PrivateKey(SSL *ssl, EVP_PKEY *pkey);
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int SSL_use_PrivateKey_ASN1(int pk, SSL *ssl, const unsigned char *d, long len);
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int SSL_use_PrivateKey_file(SSL *ssl, const char *file, int type);
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int SSL_use_RSAPrivateKey(SSL *ssl, RSA *rsa);
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int SSL_use_RSAPrivateKey_ASN1(SSL *ssl, const unsigned char *d, long len);
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int SSL_use_RSAPrivateKey_file(SSL *ssl, const char *file, int type);
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int SSL_CTX_check_private_key(const SSL_CTX *ctx);
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int SSL_check_private_key(const SSL *ssl);
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int SSL_CTX_use_cert_and_key(SSL_CTX *ctx, X509 *x, EVP_PKEY *pkey, STACK_OF(X509) *chain, int override);
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int SSL_use_cert_and_key(SSL *ssl, X509 *x, EVP_PKEY *pkey, STACK_OF(X509) *chain, int override);
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=head1 DESCRIPTION
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These functions load the certificates and private keys into the SSL_CTX
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or SSL object, respectively.
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The SSL_CTX_* class of functions loads the certificates and keys into the
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SSL_CTX object B<ctx>. The information is passed to SSL objects B<ssl>
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created from B<ctx> with L<SSL_new(3)> by copying, so that
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changes applied to B<ctx> do not propagate to already existing SSL objects.
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The SSL_* class of functions only loads certificates and keys into a
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specific SSL object. The specific information is kept, when
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L<SSL_clear(3)> is called for this SSL object.
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SSL_CTX_use_certificate() loads the certificate B<x> into B<ctx>,
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SSL_use_certificate() loads B<x> into B<ssl>. The rest of the
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certificates needed to form the complete certificate chain can be
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specified using the
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L<SSL_CTX_add_extra_chain_cert(3)>
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function.
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SSL_CTX_use_certificate_ASN1() loads the ASN1 encoded certificate from
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the memory location B<d> (with length B<len>) into B<ctx>,
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SSL_use_certificate_ASN1() loads the ASN1 encoded certificate into B<ssl>.
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SSL_CTX_use_certificate_file() loads the first certificate stored in B<file>
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into B<ctx>. The formatting B<type> of the certificate must be specified
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from the known types SSL_FILETYPE_PEM, SSL_FILETYPE_ASN1.
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SSL_use_certificate_file() loads the certificate from B<file> into B<ssl>.
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See the NOTES section on why SSL_CTX_use_certificate_chain_file()
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should be preferred.
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SSL_CTX_use_certificate_chain_file() loads a certificate chain from
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B<file> into B<ctx>. The certificates must be in PEM format and must
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be sorted starting with the subject's certificate (actual client or server
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certificate), followed by intermediate CA certificates if applicable, and
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ending at the highest level (root) CA. SSL_use_certificate_chain_file() is
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similar except it loads the certificate chain into B<ssl>.
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SSL_CTX_use_PrivateKey() adds B<pkey> as private key to B<ctx>.
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SSL_CTX_use_RSAPrivateKey() adds the private key B<rsa> of type RSA
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to B<ctx>. SSL_use_PrivateKey() adds B<pkey> as private key to B<ssl>;
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SSL_use_RSAPrivateKey() adds B<rsa> as private key of type RSA to B<ssl>.
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If a certificate has already been set and the private key does not belong
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to the certificate an error is returned. To change a [certificate/private-key]
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pair, the new certificate needs to be set first with SSL_use_certificate() or
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SSL_CTX_use_certificate() before setting the private key with
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SSL_CTX_use_PrivateKey() or SSL_use_PrivateKey().
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SSL_CTX_use_cert_and_key() and SSL_use_cert_and_key() assign the X.509
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certificate B<x>, private key B<key>, and certificate B<chain> onto the
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corresponding B<ssl> or B<ctx>. The B<pkey> argument must be the private
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key of the X.509 certificate B<x>. If the B<override> argument is 0, then
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B<x>, B<pkey> and B<chain> are set only if all were not previously set.
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If B<override> is non-0, then the certificate, private key and chain certs
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are always set. If B<pkey> is NULL, then the public key of B<x> is used as
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the private key. This is intended to be used with hardware (via the ENGINE
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interface) that stores the private key securely, such that it cannot be
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accessed by OpenSSL. The reference count of the public key is incremented
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(twice if there is no private key); it is not copied nor duplicated. This
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allows all private key validations checks to succeed without an actual
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private key being assigned via SSL_CTX_use_PrivateKey(), etc.
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SSL_CTX_use_PrivateKey_ASN1() adds the private key of type B<pk>
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stored at memory location B<d> (length B<len>) to B<ctx>.
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SSL_CTX_use_RSAPrivateKey_ASN1() adds the private key of type RSA
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stored at memory location B<d> (length B<len>) to B<ctx>.
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SSL_use_PrivateKey_ASN1() and SSL_use_RSAPrivateKey_ASN1() add the private
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key to B<ssl>.
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SSL_CTX_use_PrivateKey_file() adds the first private key found in
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B<file> to B<ctx>. The formatting B<type> of the private key must be specified
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from the known types SSL_FILETYPE_PEM, SSL_FILETYPE_ASN1.
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SSL_CTX_use_RSAPrivateKey_file() adds the first private RSA key found in
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B<file> to B<ctx>. SSL_use_PrivateKey_file() adds the first private key found
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in B<file> to B<ssl>; SSL_use_RSAPrivateKey_file() adds the first private
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RSA key found to B<ssl>.
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SSL_CTX_check_private_key() checks the consistency of a private key with
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the corresponding certificate loaded into B<ctx>. If more than one
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key/certificate pair (RSA/DSA) is installed, the last item installed will
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be checked. If e.g. the last item was a RSA certificate or key, the RSA
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key/certificate pair will be checked. SSL_check_private_key() performs
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the same check for B<ssl>. If no key/certificate was explicitly added for
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this B<ssl>, the last item added into B<ctx> will be checked.
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=head1 NOTES
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The internal certificate store of OpenSSL can hold several private
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key/certificate pairs at a time. The certificate used depends on the
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cipher selected, see also L<SSL_CTX_set_cipher_list(3)>.
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When reading certificates and private keys from file, files of type
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SSL_FILETYPE_ASN1 (also known as B<DER>, binary encoding) can only contain
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one certificate or private key, consequently
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SSL_CTX_use_certificate_chain_file() is only applicable to PEM formatting.
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Files of type SSL_FILETYPE_PEM can contain more than one item.
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SSL_CTX_use_certificate_chain_file() adds the first certificate found
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in the file to the certificate store. The other certificates are added
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to the store of chain certificates using L<SSL_CTX_add1_chain_cert(3)>.
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Note: versions of OpenSSL before 1.0.2 only had a single
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certificate chain store for all certificate types, OpenSSL 1.0.2 and later
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have a separate chain store for each type. SSL_CTX_use_certificate_chain_file()
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should be used instead of the SSL_CTX_use_certificate_file() function in order
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to allow the use of complete certificate chains even when no trusted CA
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storage is used or when the CA issuing the certificate shall not be added to
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the trusted CA storage.
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If additional certificates are needed to complete the chain during the
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TLS negotiation, CA certificates are additionally looked up in the
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locations of trusted CA certificates, see
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L<SSL_CTX_load_verify_locations(3)>.
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The private keys loaded from file can be encrypted. In order to successfully
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load encrypted keys, a function returning the passphrase must have been
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supplied, see
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L<SSL_CTX_set_default_passwd_cb(3)>.
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(Certificate files might be encrypted as well from the technical point
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of view, it however does not make sense as the data in the certificate
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is considered public anyway.)
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All of the functions to set a new certificate will replace any existing
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certificate of the same type that has already been set. Similarly all of the
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functions to set a new private key will replace any private key that has already
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been set. Applications should call L<SSL_CTX_check_private_key(3)> or
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L<SSL_check_private_key(3)> as appropriate after loading a new certificate and
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private key to confirm that the certificate and key match.
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=head1 RETURN VALUES
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On success, the functions return 1.
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Otherwise check out the error stack to find out the reason.
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=head1 SEE ALSO
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L<ssl(7)>, L<SSL_new(3)>, L<SSL_clear(3)>,
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L<SSL_CTX_load_verify_locations(3)>,
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L<SSL_CTX_set_default_passwd_cb(3)>,
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L<SSL_CTX_set_cipher_list(3)>,
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L<SSL_CTX_set_client_CA_list(3)>,
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L<SSL_CTX_set_client_cert_cb(3)>,
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L<SSL_CTX_add_extra_chain_cert(3)>
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=head1 COPYRIGHT
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Copyright 2000-2022 The OpenSSL Project Authors. All Rights Reserved.
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Licensed under the Apache License 2.0 (the "License"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file LICENSE in the source distribution or at
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L<https://www.openssl.org/source/license.html>.
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=cut
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