Premaster secret and master key in OpenSSL

Question

I have following values:

1. client-random bytes
2. server-random bytes
3. pre-master secret

I don\'t want to use features like SSL , SS

Answer 1

JKJS
    int master_secret(unsigned char *dest,int len,unsigned char *pre_master_secret,int pms_len,unsigned char *label,unsigned char *seed,int seed_len)
    {/*dest :where master secret will be stored
      len   :desired length of master secret
      pre_master_secret :given pre-master secret
      pms_len   :length of given pre-master secret
      label :given label to be fed to PRF
      seed  :given seed to be fed to PRF
      seed_len  :length of given seed

      finally,our function is analogus to RFC-2246 PRF definition:PRF(secret,label,seed)
      where,    secret=pre-master secret
            label=label
            seed=seed
    */
    EVP_MD *md5,*sha;
    md5=EVP_md5();
    sha=EVP_sha();

    int i=0,j,position;

    int half_secret_len=pms_len/2+pms_len%2;

    unsigned char md5_secret[half_secret_len];  //first half of the pre-master secret, analogus to S1 in RFC-2246
    for(i=0;i