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    Command:

    gnutls_prf

    
    
    

    SYNOPSIS

           #include <gnutls/gnutls.h>
    
           int  gnutls_prf(gnutls_session_t session, size_t label_size, const char
           * label, int  server_random_first,  size_t  extra_size,  const  char  *
           extra, size_t outsize, char * out);
    
    
    

    ARGUMENTS

           gnutls_session_t session
                       is a gnutls_session_t structure.
    
           size_t label_size
                       length of the  label variable.
    
           const char * label
                       label used in PRF computation, typically a short string.
    
           int server_random_first
                       non-0 if server random field should be first in seed
    
           size_t extra_size
                       length of the  extra variable.
    
           const char * extra
                       optional extra data to seed the PRF with.
    
           size_t outsize
                       size of pre-allocated output buffer to hold the output.
    
           char * out  pre-allocated buffer to hold the generated data.
    
    
    

    DESCRIPTION

           Applies  the  TLS Pseudo-Random-Function (PRF) on the master secret and
           the provided data, seeded with the client and server random fields,  as
           specified in RFC5705.
    
           The   label variable usually contains a string denoting the purpose for
           the generated data.  The   server_random_first  indicates  whether  the
           client  random  field or the server random field should be first in the
           seed.  Non-0 indicates that the server random field is  first,  0  that
           the client random field is first.
    
           The  extra variable can be used to add more data to the seed, after the
           random variables.  It can be used to make sure the generated output  is
           strongly connected to some additional data (e.g., a string used in user
           authentication).
    
           The output is placed in  out , which must be pre-allocated.
    
    
    

    RETURNS

           GNUTLS_E_SUCCESS on success, or an error code.
    
           visit
    
           http://www.gnutls.org/manual/
    
    
    

    gnutls 3.2.11 gnutls_prf(3)

    
    
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