gnutls_dh_set_prime_bits(3)        gnutls        gnutls_dh_set_prime_bits(3)

NAME         top

       gnutls_dh_set_prime_bits - API function

SYNOPSIS         top

       #include <gnutls/gnutls.h>

       void gnutls_dh_set_prime_bits(gnutls_session_t session, unsigned int

ARGUMENTS         top

       gnutls_session_t session
                   is a gnutls_session_t type.

       unsigned int bits
                   is the number of bits

DESCRIPTION         top

       This function sets the number of bits, for use in a Diffie-Hellman
       key exchange.  This is used both in DH ephemeral and DH anonymous
       cipher suites.  This will set the minimum size of the prime that will
       be used for the handshake.

       In the client side it sets the minimum accepted number of bits.  If a
       server sends a prime with less bits than that
       GNUTLS_E_DH_PRIME_UNACCEPTABLE will be returned by the handshake.

       Note that this function will warn via the audit log for value that
       are believed to be weak.

       The function has no effect in server side.

       Note that since 3.1.7 this function is deprecated. The minimum number
       of bits is set by the priority string level.  Also this function must
       be called after gnutls_priority_set_direct() or the set value may be
       overridden by the selected priority options.

REPORTING BUGS         top

       Report bugs to <>.
       Home page:

COPYRIGHT         top

       Copyright © 2001-2017 Free Software Foundation, Inc., and others.
       Copying and distribution of this file, with or without modification,
       are permitted in any medium without royalty provided the copyright
       notice and this notice are preserved.

SEE ALSO         top

       The full documentation for gnutls is maintained as a Texinfo manual.
       If the /usr/share/doc/gnutls/ directory does not contain the HTML
       form visit 

COLOPHON         top

       This page is part of the GnuTLS (GnuTLS Transport Layer Security
       Library) project.  Information about the project can be found at 
       ⟨⟩.  If you have a bug report for this manual
       page, send it to  This page was obtained from the
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gnutls                              3.6.1        gnutls_dh_set_prime_bits(3)