298 lines
12 KiB
Groff
298 lines
12 KiB
Groff
.\" $NetBSD: SSL_CTX_use_certificate.3,v 1.8 2003/07/24 14:16:45 itojun Exp $
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.\" ======================================================================
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.\"
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.IX Title "SSL_CTX_use_certificate 3"
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.TH SSL_CTX_use_certificate 3 "0.9.7b" "2002-02-15" "OpenSSL"
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.UC
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.SH "NAME"
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SSL_CTX_use_certificate, SSL_CTX_use_certificate_ASN1, SSL_CTX_use_certificate_file, SSL_use_certificate, SSL_use_certificate_ASN1, SSL_use_certificate_file, SSL_CTX_use_certificate_chain_file, SSL_CTX_use_PrivateKey, SSL_CTX_use_PrivateKey_ASN1, SSL_CTX_use_PrivateKey_file, SSL_CTX_use_RSAPrivateKey, SSL_CTX_use_RSAPrivateKey_ASN1, SSL_CTX_use_RSAPrivateKey_file, SSL_use_PrivateKey_file, SSL_use_PrivateKey_ASN1, SSL_use_PrivateKey, SSL_use_RSAPrivateKey, SSL_use_RSAPrivateKey_ASN1, SSL_use_RSAPrivateKey_file, SSL_CTX_check_private_key, SSL_check_private_key \- load certificate and key data
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.SH "LIBRARY"
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libcrypto, -lcrypto
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.SH "SYNOPSIS"
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.IX Header "SYNOPSIS"
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.Vb 1
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\& #include <openssl/ssl.h>
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.Ve
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.Vb 6
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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, 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, 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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.Ve
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.Vb 1
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\& int SSL_CTX_use_certificate_chain_file(SSL_CTX *ctx, const char *file);
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.Ve
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.Vb 13
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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, 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, 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, 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, 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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.Ve
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.Vb 2
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\& int SSL_CTX_check_private_key(SSL_CTX *ctx);
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\& int SSL_check_private_key(SSL *ssl);
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.Ve
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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These functions load the certificates and private keys into the \s-1SSL_CTX\s0
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or \s-1SSL\s0 object, respectively.
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.PP
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The SSL_CTX_* class of functions loads the certificates and keys into the
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\&\s-1SSL_CTX\s0 object \fBctx\fR. The information is passed to \s-1SSL\s0 objects \fBssl\fR
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created from \fBctx\fR with SSL_new(3) by copying, so that
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changes applied to \fBctx\fR do not propagate to already existing \s-1SSL\s0 objects.
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.PP
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The SSL_* class of functions only loads certificates and keys into a
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specific \s-1SSL\s0 object. The specific information is kept, when
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SSL_clear(3) is called for this \s-1SSL\s0 object.
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.PP
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\&\fISSL_CTX_use_certificate()\fR loads the certificate \fBx\fR into \fBctx\fR,
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\&\fISSL_use_certificate()\fR loads \fBx\fR into \fBssl\fR. 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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SSL_CTX_add_extra_chain_cert(3)
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function.
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.PP
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\&\fISSL_CTX_use_certificate_ASN1()\fR loads the \s-1ASN1\s0 encoded certificate from
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the memory location \fBd\fR (with length \fBlen\fR) into \fBctx\fR,
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\&\fISSL_use_certificate_ASN1()\fR loads the \s-1ASN1\s0 encoded certificate into \fBssl\fR.
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.PP
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\&\fISSL_CTX_use_certificate_file()\fR loads the first certificate stored in \fBfile\fR
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into \fBctx\fR. The formatting \fBtype\fR of the certificate must be specified
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from the known types \s-1SSL_FILETYPE_PEM\s0, \s-1SSL_FILETYPE_ASN1\s0.
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\&\fISSL_use_certificate_file()\fR loads the certificate from \fBfile\fR into \fBssl\fR.
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See the \s-1NOTES\s0 section on why \fISSL_CTX_use_certificate_chain_file()\fR
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should be preferred.
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.PP
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\&\fISSL_CTX_use_certificate_chain_file()\fR loads a certificate chain from
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\&\fBfile\fR into \fBctx\fR. The certificates must be in \s-1PEM\s0 format and must
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be sorted starting with the certificate to the highest level (root \s-1CA\s0).
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There is no corresponding function working on a single \s-1SSL\s0 object.
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.PP
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\&\fISSL_CTX_use_PrivateKey()\fR adds \fBpkey\fR as private key to \fBctx\fR.
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\&\fISSL_CTX_use_RSAPrivateKey()\fR adds the private key \fBrsa\fR of type \s-1RSA\s0
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to \fBctx\fR. \fISSL_use_PrivateKey()\fR adds \fBpkey\fR as private key to \fBssl\fR;
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\&\fISSL_use_RSAPrivateKey()\fR adds \fBrsa\fR as private key of type \s-1RSA\s0 to \fBssl\fR.
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.PP
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\&\fISSL_CTX_use_PrivateKey_ASN1()\fR adds the private key of type \fBpk\fR
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stored at memory location \fBd\fR (length \fBlen\fR) to \fBctx\fR.
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\&\fISSL_CTX_use_RSAPrivateKey_ASN1()\fR adds the private key of type \s-1RSA\s0
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stored at memory location \fBd\fR (length \fBlen\fR) to \fBctx\fR.
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\&\fISSL_use_PrivateKey_ASN1()\fR and \fISSL_use_RSAPrivateKey_ASN1()\fR add the private
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key to \fBssl\fR.
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.PP
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\&\fISSL_CTX_use_PrivateKey_file()\fR adds the first private key found in
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\&\fBfile\fR to \fBctx\fR. The formatting \fBtype\fR of the certificate must be specified
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from the known types \s-1SSL_FILETYPE_PEM\s0, \s-1SSL_FILETYPE_ASN1\s0.
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\&\fISSL_CTX_use_RSAPrivateKey_file()\fR adds the first private \s-1RSA\s0 key found in
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\&\fBfile\fR to \fBctx\fR. \fISSL_use_PrivateKey_file()\fR adds the first private key found
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in \fBfile\fR to \fBssl\fR; \fISSL_use_RSAPrivateKey_file()\fR adds the first private
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\&\s-1RSA\s0 key found to \fBssl\fR.
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.PP
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\&\fISSL_CTX_check_private_key()\fR checks the consistency of a private key with
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the corresponding certificate loaded into \fBctx\fR. If more than one
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key/certificate pair (\s-1RSA/DSA\s0) is installed, the last item installed will
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be checked. If e.g. the last item was a \s-1RSA\s0 certificate or key, the \s-1RSA\s0
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key/certificate pair will be checked. \fISSL_check_private_key()\fR performs
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the same check for \fBssl\fR. If no key/certificate was explicitly added for
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this \fBssl\fR, the last item added into \fBctx\fR will be checked.
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.SH "NOTES"
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.IX Header "NOTES"
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The internal certificate store of OpenSSL can hold two private key/certificate
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pairs at a time: one key/certificate of type \s-1RSA\s0 and one key/certificate
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of type \s-1DSA\s0. The certificate used depends on the cipher select, see
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also SSL_CTX_set_cipher_list(3).
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.PP
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When reading certificates and private keys from file, files of type
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\&\s-1SSL_FILETYPE_ASN1\s0 (also known as \fB\s-1DER\s0\fR, binary encoding) can only contain
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one certificate or private key, consequently
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\&\fISSL_CTX_use_certificate_chain_file()\fR is only applicable to \s-1PEM\s0 formatting.
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Files of type \s-1SSL_FILETYPE_PEM\s0 can contain more than one item.
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.PP
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\&\fISSL_CTX_use_certificate_chain_file()\fR 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
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SSL_CTX_add_extra_chain_cert(3).
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There exists only one extra chain store, so that the same chain is appended
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to both types of certificates, \s-1RSA\s0 and \s-1DSA\s0! If it is not intended to use
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both type of certificate at the same time, it is recommended to use the
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\&\fISSL_CTX_use_certificate_chain_file()\fR instead of the
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\&\fISSL_CTX_use_certificate_file()\fR function in order to allow the use of
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complete certificate chains even when no trusted \s-1CA\s0 storage is used or
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when the \s-1CA\s0 issuing the certificate shall not be added to the trusted
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\&\s-1CA\s0 storage.
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.PP
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If additional certificates are needed to complete the chain during the
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\&\s-1TLS\s0 negotiation, \s-1CA\s0 certificates are additionally looked up in the
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locations of trusted \s-1CA\s0 certificates, see
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SSL_CTX_load_verify_locations(3).
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.PP
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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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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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.SH "RETURN VALUES"
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.IX Header "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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.SH "SEE ALSO"
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.IX Header "SEE ALSO"
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ssl(3), SSL_new(3), SSL_clear(3),
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SSL_CTX_load_verify_locations(3),
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SSL_CTX_set_default_passwd_cb(3),
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SSL_CTX_set_cipher_list(3),
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SSL_CTX_set_client_cert_cb(3),
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SSL_CTX_add_extra_chain_cert(3)
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