SSLCTXnew(3) OpenSSL SSLCTXnew(3)

NAME
       SSLCTXnew - create a new SSLCTX object as framework for TLS/SSL
       enabled functions

SYNOPSIS
        #include 

        SSLCTX *SSLCTXnew(SSLMETHOD *method);

DESCRIPTION
       SSLCTXnew() creates a new SSSSLLCCTTXX object as framework to establish
       TLS/SSL enabled connections.

NNOOTTEESS
       The SSLCTX object uses mmeetthhoodd as connection method. The methods exist
       in a generic type (for client and server use), a server only type, and
       a client only type. mmeetthhoodd can be of the following types:

       SSLv2method(void), SSLv2servermethod(void),
       SSLv2clientmethod(void)
           A TLS/SSL connection established with these methods will only
           understand the SSLv2 protocol. A client will send out SSLv2 client
           hello messages and will also indicate that it only understand
           SSLv2. A server will only understand SSLv2 client hello messages.

       SSLv3method(void), SSLv3servermethod(void),
       SSLv3clientmethod(void)
           A TLS/SSL connection established with these methods will only
           understand the SSLv3 protocol. A client will send out SSLv3 client
           hello messages and will indicate that it only understands SSLv3. A
           server will only understand SSLv3 client hello messages. This
           especially means, that it will not understand SSLv2 client hello
           messages which are widely used for compatibility reasons, see
           SSLv23*method().

       TLSv1method(void), TLSv1servermethod(void),
       TLSv1clientmethod(void)
           A TLS/SSL connection established with these methods will only
           understand the TLSv1 protocol. A client will send out TLSv1 client
           hello messages and will indicate that it only understands TLSv1. A
           server will only understand TLSv1 client hello messages. This
           especially means, that it will not understand SSLv2 client hello
           messages which are widely used for compatibility reasons, see
           SSLv23*method(). It will also not understand SSLv3 client hello
           messages.

       SSLv23method(void), SSLv23servermethod(void),
       SSLv23clientmethod(void)
           A TLS/SSL connection established with these methods will understand
           the SSLv2, SSLv3, and TLSv1 protocol. A client will send out SSLv2
           client hello messages and will indicate that it also understands
           SSLv3 and TLSv1. A server will understand SSLv2, SSLv3, and TLSv1
           client hello messages. This is the best choice when compatibility
           is a concern.

       The list of protocols available can later be limited using the
       SSLOPNOSSLv2, SSLOPNOSSLv3, SSLOPNOTLSv1 options of the
       SSSSLLCCTTXXsseettooppttiioonnss(()) or SSSSLLsseettooppttiioonnss(()) functions. Using these
       options it is possible to choose e.g. SSLv23servermethod() and be
       able to negotiate with all possible clients, but to only allow newer
       protocols like SSLv3 or TLSv1.

       SSLCTXnew() initializes the list of ciphers, the session cache
       setting, the callbacks, the keys and certificates, and the options to
       its default values.

RETURN VALUES
       The following return values can occur:

       NULL
           The creation of a new SSLCTX object failed. Check the error stack
           to find out the reason.

       Pointer to an SSLCTX object
           The return value points to an allocated SSLCTX object.

SEE ALSO
       SSLCTXfree(3), SSLaccept(3), ssl(3),  SSLsetconnectstate(3)



0.9.7l                            2001-07-25                    SSLCTXnew(3)