external/ibm-public/postfix/dist/src/tls/tls_rsa.c

   1 /*      $NetBSD$        */
   2
   3 /*++
   4 /* NAME
   5 /*      tls_rsa
   6 /* SUMMARY
   7 /*      RSA support
   8 /* SYNOPSIS
   9 /*      #define TLS_INTERNAL
  10 /*      #include <tls.h>
  11 /*
  12 /*      RSA     *tls_tmp_rsa_cb(ssl, export, keylength)
  13 /*      SSL     *ssl; /* unused */
  14 /*      int     export;
  15 /*      int     keylength;
  16 /* DESCRIPTION
  17 /*      This module maintains parameters for Diffie-Hellman key generation.
  18 /*
  19 /*      tls_tmp_rsa_cb() is a call-back routine for the
  20 /*      SSL_CTX_set_tmp_rsa_callback() function.
  21 /* LICENSE
  22 /* .ad
  23 /* .fi
  24 /*      This software is free. You can do with it whatever you want.
  25 /*      The original author kindly requests that you acknowledge
  26 /*      the use of his software.
  27 /* AUTHOR(S)
  28 /*      Originally written by:
  29 /*      Lutz Jaenicke
  30 /*      BTU Cottbus
  31 /*      Allgemeine Elektrotechnik
  32 /*      Universitaetsplatz 3-4
  33 /*      D-03044 Cottbus, Germany
  34 /*
  35 /*      Updated by:
  36 /*      Wietse Venema
  37 /*      IBM T.J. Watson Research
  38 /*      P.O. Box 704
  39 /*      Yorktown Heights, NY 10598, USA
  40 /*--*/
  41
  42 /* System library. */
  43
  44 #include <sys_defs.h>
  45
  46 #ifdef USE_TLS
  47
  48 /* TLS library. */
  49
  50 #define TLS_INTERNAL
  51 #include <tls.h>
  52
  53 /* tls_tmp_rsa_cb - call-back to generate ephemeral RSA key */
  54
  55 RSA *tls_tmp_rsa_cb(SSL *unused_ssl, int unused_export, int keylength)
  56 {
  57     static RSA *rsa_tmp;
  58
  59     /* Code adapted from OpenSSL apps/s_cb.c */
  60
  61     if (rsa_tmp == 0)
  62         rsa_tmp = RSA_generate_key(keylength, RSA_F4, NULL, NULL);
  63     return (rsa_tmp);
  64 }
  65
  66 #ifdef TEST
  67
  68 int main(int unused_argc, char **unused_argv)
  69 {
  70     tls_tmp_rsa_cb(0, 1, 512);
  71     tls_tmp_rsa_cb(0, 1, 1024);
  72     tls_tmp_rsa_cb(0, 1, 2048);
  73     tls_tmp_rsa_cb(0, 0, 512);
  74 }
  75
  76 #endif
  77
  78 #endif