SSL_CTX_use_certificate(3)   OpenSSL   SSL_CTX_use_certificate(3)


     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


      #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_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, 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);


     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.

1.0.2t               Last change: 2019-09-10                    1

SSL_CTX_use_certificate(3)   OpenSSL   SSL_CTX_use_certificate(3)

     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)

     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_use_certificate_file() loads the certificate from file
     into ssl.  See the NOTES section on why
     SSL_CTX_use_certificate_chain_file() should be preferred.

     SSL_CTX_use_certificate_chain_file() loads a certificate
     chain from file 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 certificate
     must be specified from the known types SSL_FILETYPE_PEM,

1.0.2t               Last change: 2019-09-10                    2

SSL_CTX_use_certificate(3)   OpenSSL   SSL_CTX_use_certificate(3)

     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.

     SSL_CTX_check_private_key() checks the consistency of a
     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 checked. If e.g.
     the last item was a RSA certificate or key, the RSA
     key/certificate pair will be checked.
     SSL_check_private_key() performs the same check for ssl. If
     no key/certificate was explicitly added for this ssl, the
     last item added into ctx will be checked.


     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

     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). Note:
     versions of OpenSSL before 1.0.2 only had a single
     certificate chain store for all certificate types, OpenSSL
     1.0.2 and later have a separate chain store for each type.
     SSL_CTX_use_certificate_chain_file() should be used 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

     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

1.0.2t               Last change: 2019-09-10                    3

SSL_CTX_use_certificate(3)   OpenSSL   SSL_CTX_use_certificate(3)

     however does not make sense as the data in the certificate
     is considered public anyway.)

     All of the functions to set a new certificate will replace
     any existing certificate of the same type that has already
     been set. Similarly all of the functions to set a new
     private key will replace any private key that has already
     been set. Applications should call
     SSL_CTX_check_private_key(3) or SSL_check_private_key(3) as
     appropriate after loading a new certificate and private key
     to confirm that the certificate and key match.


     On success, the functions return 1.  Otherwise check out the
     error stack to find out the reason.


     ssl(3), SSL_new(3), SSL_clear(3),
     SSL_CTX_set_cipher_list(3), SSL_CTX_set_client_cert_cb(3),


     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 .

1.0.2t               Last change: 2019-09-10                    4

Man(1) output converted with man2html