NAME
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_certificate_chain_mem,
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
SYNOPSIS
#include
<openssl/ssl.h>
int
SSL_CTX_use_certificate(SSL_CTX
*ctx, X509 *x);
int
SSL_CTX_use_certificate_ASN1(SSL_CTX
*ctx, int len,
unsigned char *d);
int
SSL_CTX_use_certificate_file(SSL_CTX
*ctx, const char
*file, int
type);
int
SSL_use_certificate(SSL
*ssl, X509 *x);
int
SSL_use_certificate_ASN1(SSL
*ssl, unsigned char
*d, int len);
int
SSL_use_certificate_file(SSL
*ssl, const char
*file, int
type);
int
SSL_CTX_use_certificate_chain_file(SSL_CTX
*ctx, const char
*file);
int
SSL_CTX_use_certificate_chain_mem(SSL_CTX
*ctx, void *buf,
int len);
int
SSL_CTX_use_PrivateKey(SSL_CTX
*ctx, EVP_PKEY
*pkey);
int
SSL_CTX_use_PrivateKey_ASN1(int
pk, SSL_CTX *ctx, unsigned char
*d, long len);
int
SSL_CTX_use_PrivateKey_file(SSL_CTX
*ctx, const char
*file, int
type);
int
SSL_CTX_use_RSAPrivateKey(SSL_CTX
*ctx, RSA
*rsa);
int
SSL_CTX_use_RSAPrivateKey_ASN1(SSL_CTX
*ctx, unsigned char
*d, long len);
int
SSL_CTX_use_RSAPrivateKey_file(SSL_CTX
*ctx, const char
*file, int
type);
int
SSL_use_PrivateKey(SSL
*ssl, EVP_PKEY
*pkey);
int
SSL_use_PrivateKey_ASN1(int
pk, SSL *ssl,
unsigned char *d,
long len);
int
SSL_use_PrivateKey_file(SSL
*ssl, const char
*file, int
type);
int
SSL_use_RSAPrivateKey(SSL
*ssl, RSA
*rsa);
int
SSL_use_RSAPrivateKey_ASN1(SSL
*ssl, const unsigned char
*d, long len);
int
SSL_use_RSAPrivateKey_file(SSL
*ssl, const char
*file, int
type);
int
SSL_CTX_check_private_key(const
SSL_CTX *ctx);
int
SSL_check_private_key(const
SSL *ssl);
DESCRIPTION
These functions load the certificates and private keys into the SSL_CTX or SSL object, respectively.
The
SSL_CTX_*()
class of functions loads the certificates and keys into the
SSL_CTX object ctx. The
information is passed to SSL objects
ssl created from ctx with
SSL_new(3) by copying, so that changes applied to
ctx do not propagate to already existing
SSL objects.
The
SSL_*() class
of functions only loads certificates and keys into a specific
SSL object. The specific information is kept when
SSL_clear(3) is called for this SSL object.
SSL_CTX_use_certificate()
loads the certificate x into
ctx;
SSL_use_certificate()
loads x into ssl. The rest of
the certificates needed to form the complete certificate chain can be
specified using the
SSL_CTX_add_extra_chain_cert(3) function.
SSL_CTX_use_certificate_ASN1()
loads the ASN1 encoded certificate from the memory location
d (with length len) into
ctx;
SSL_use_certificate_ASN1()
loads the ASN1 encoded certificate into ssl.
SSL_CTX_use_certificate_file()
loads the first certificate stored in file into
ctx. The formatting type of the
certificate must be specified from the known types
SSL_FILETYPE_PEM and
SSL_FILETYPE_ASN1.
SSL_use_certificate_file()
loads the certificate from file into
ssl. See the
section on why
SSL_CTX_use_certificate_chain_file()
should be preferred.
The
SSL_CTX_use_certificate_chain*()
functions load a certificate chain into ctx. The
certificates must be in PEM format and must be sorted starting with the
subject's certificate (actual client or server certificate), followed by
intermediate CA certificates if applicable, and ending at the highest level
(root) CA. There is no corresponding function working on a single
SSL object.
SSL_CTX_use_PrivateKey()
adds pkey as private key to ctx.
SSL_CTX_use_RSAPrivateKey()
adds the private key rsa of type RSA to
ctx.
SSL_use_PrivateKey()
adds pkey as private key to ssl;
SSL_use_RSAPrivateKey()
adds rsa as private key of type RSA to
ssl. If a certificate has already been set and the
private does not belong to the certificate, an error is returned. To change
a certificate private key pair, the new certificate needs to be set with
SSL_use_certificate() or
SSL_CTX_use_certificate() before setting the private
key with SSL_CTX_use_PrivateKey() or
SSL_use_PrivateKey().
SSL_CTX_use_PrivateKey_ASN1()
adds the private key of type pk stored at memory
location d (length len) to
ctx.
SSL_CTX_use_RSAPrivateKey_ASN1()
adds the private key of type RSA stored at memory location
d (length len) to
ctx.
SSL_use_PrivateKey_ASN1()
and
SSL_use_RSAPrivateKey_ASN1()
add the private key to ssl.
SSL_CTX_use_PrivateKey_file()
adds the first private key found in file to
ctx. The formatting type of the
private key must be specified from the known types
SSL_FILETYPE_PEM and
SSL_FILETYPE_ASN1.
SSL_CTX_use_RSAPrivateKey_file()
adds the first private RSA key found in file to
ctx.
SSL_use_PrivateKey_file()
adds the first private key found in file to
ssl;
SSL_use_RSAPrivateKey_file()
adds the first private RSA key found to ssl.
The
SSL_CTX_check_private_key()
function is seriously misnamed. It compares the public key
components and parameters of an OpenSSL private key with the corresponding
certificate loaded into ctx. If more than one
key/certificate pair (RSA/DSA) is installed, the last item installed will be
compared. If, e.g., the last item was an RSA certificate or key, the RSA
key/certificate pair will be checked.
SSL_check_private_key()
performs the same public key comparison for
ssl. If no key/certificate was explicitly added for
this ssl, the last item added into
ctx will be checked.
Despite the name, neither
SSL_CTX_check_private_key()
nor
SSL_check_private_key()
checks whether the private key component is indeed a private key, nor
whether it matches the public key component. They merely compare the public
materials (e.g. exponent and modulus of an RSA key) and/or key parameters
(e.g. EC params of an EC key) of a key pair.
NOTES
The internal certificate store of OpenSSL can hold several private key/certificate pairs at a time. The certificate used depends on the cipher selected. See also SSL_CTX_set_cipher_list(3).
When reading certificates and private keys from file,
files of type SSL_FILETYPE_ASN1 (also known as
DER, binary encoding)
can only contain one certificate or private key; consequently,
SSL_CTX_use_certificate_chain_file()
is only applicable to PEM formatting. Files of type
SSL_FILETYPE_PEM can contain more than one item.
SSL_CTX_use_certificate_chain_file()
adds the first certificate found in the file to the certificate store. The
other certificates are added to the store of chain certificates using
SSL_CTX_add1_chain_cert(3). It is recommended to use the
SSL_CTX_use_certificate_chain_file() instead of the
SSL_CTX_use_certificate_file() function in order to
allow the use of complete certificate chains even when no trusted CA storage
is used or when the CA issuing the certificate shall not be added to the
trusted CA storage.
If additional certificates are needed to complete the chain during the TLS negotiation, CA certificates are additionally looked up in the locations of trusted CA certificates (see SSL_CTX_load_verify_locations(3)).
The private keys loaded from file can be encrypted. In order to successfully load encrypted keys, a function returning the passphrase must have been supplied (see SSL_CTX_set_default_passwd_cb(3)). (Certificate files might be encrypted as well from the technical point of view, it however does not make sense as the data in the certificate is considered public anyway.)
RETURN VALUES
On success, the functions return 1. Otherwise check out the error stack to find out the reason.
SEE ALSO
ssl(3), SSL_clear(3), SSL_CTX_add1_chain_cert(3), SSL_CTX_add_extra_chain_cert(3), SSL_CTX_load_verify_locations(3), SSL_CTX_set_cipher_list(3), SSL_CTX_set_client_CA_list(3), SSL_CTX_set_client_cert_cb(3), SSL_CTX_set_default_passwd_cb(3), SSL_new(3), X509_check_private_key(3)
HISTORY
SSL_use_certificate(),
SSL_use_certificate_file(),
SSL_use_RSAPrivateKey(), and
SSL_use_RSAPrivateKey_file() appeared in SSLeay 0.4
or earlier. SSL_use_certificate_ASN1() and
SSL_use_RSAPrivateKey_ASN1() first appeared in
SSLeay 0.5.1. SSL_use_PrivateKey_file(),
SSL_use_PrivateKey_ASN1(), and
SSL_use_PrivateKey() first appeared in SSLeay 0.6.0.
SSL_CTX_use_certificate(),
SSL_CTX_use_certificate_ASN1(),
SSL_CTX_use_certificate_file(),
SSL_CTX_use_PrivateKey(),
SSL_CTX_use_PrivateKey_ASN1(),
SSL_CTX_use_PrivateKey_file(),
SSL_CTX_use_RSAPrivateKey(),
SSL_CTX_use_RSAPrivateKey_ASN1(), and
SSL_CTX_use_RSAPrivateKey_file() first appeared in
SSLeay 0.6.1. SSL_CTX_check_private_key() and
SSL_check_private_key() first appeared in SSLeay
0.6.5. All these functions have been available since
OpenBSD 2.4.
SSL_CTX_use_certificate_chain_file() first
appeared in OpenSSL 0.9.4 and has been available since
OpenBSD 2.6.
Support for DER encoded private keys
(SSL_FILETYPE_ASN1) in
SSL_CTX_use_PrivateKey_file() and
SSL_use_PrivateKey_file() was added in 0.9.8.
SSL_CTX_use_certificate_chain_mem() first
appeared in OpenBSD 5.7.