SoftHSMv2/m4/acx_openssl_ecc.m4

   1 AC_DEFUN([ACX_OPENSSL_ECC],[
   2         AC_MSG_CHECKING(for OpenSSL ECC support)
   3
   4         tmp_CPPFLAGS=$CPPFLAGS
   5         tmp_LIBS=$LIBS
   6
   7         CPPFLAGS="$CPPFLAGS $CRYPTO_INCLUDES"
   8         LIBS="$CRYPTO_LIBS $LIBS"
   9
  10         AC_LANG_PUSH([C])
  11         AC_CACHE_VAL([acx_cv_lib_openssl_ecc_support],[
  12                 acx_cv_lib_openssl_ecc_support=no
  13                 AC_RUN_IFELSE([
  14                         AC_LANG_SOURCE([[
  15                                 #include <openssl/ecdsa.h>
  16                                 #include <openssl/objects.h>
  17                                 int main()
  18                                 {
  19                                         EC_KEY *ec256, *ec384, *ec521;
  20
  21                                         ec256 = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
  22                                         ec384 = EC_KEY_new_by_curve_name(NID_secp384r1);
  23                                         ec521 = EC_KEY_new_by_curve_name(NID_secp521r1);
  24                                         if (ec256 == NULL || ec384 == NULL || ec521 == NULL)
  25                                                 return 1;
  26                                         return 0;
  27                                 }
  28                         ]])
  29                 ],[
  30                         AC_MSG_RESULT([Found P256, P384, and P521])
  31                         acx_cv_lib_openssl_ecc_support=yes
  32                 ],[
  33                         AC_MSG_RESULT([Cannot find P256, P384, or P521])
  34                         AC_MSG_ERROR([OpenSSL library has no ECC support])
  35                 ],[
  36                         AC_MSG_WARN([Cannot test, assuming P256, P384, and P521])
  37                         acx_cv_lib_openssl_ecc_support=yes
  38                 ])
  39         ])
  40         AC_LANG_POP([C])
  41
  42         CPPFLAGS=$tmp_CPPFLAGS
  43         LIBS=$tmp_LIBS
  44 ])