added API for random number generators, served through credential factory

ported randomizer_t to a rng_t on top of /dev/(u)random (plugin random)

configure.in

@@ -223,6 +223,17 @@ AC_ARG_ENABLE(
 	gmp=true
 )
 
+AC_ARG_ENABLE(
+	[random],
+	AS_HELP_STRING([--disable-random],[disable RNG implementation on top of /dev/(u)random. (default is NO).]),
+	[if test x$enableval = xyes; then
+		random=true
+	 else
+		random=false
+	fi],
+	random=true
+)
+
 AC_ARG_ENABLE(
 	[x509],
 	AS_HELP_STRING([--disable-x509],[disable own X509 certificate implementation plugin. (default is NO).]),
@@ -589,6 +600,7 @@ AM_CONDITIONAL(USE_SHA1, test x$sha1 = xtrue)
 AM_CONDITIONAL(USE_SHA2, test x$sha2 = xtrue)
 AM_CONDITIONAL(USE_FIPS_PRF, test x$fips_prf = xtrue)
 AM_CONDITIONAL(USE_GMP, test x$gmp = xtrue)
+AM_CONDITIONAL(USE_RANDOM, test x$random = xtrue)
 AM_CONDITIONAL(USE_X509, test x$x509 = xtrue)
 AM_CONDITIONAL(USE_HMAC, test x$hmac = xtrue)
 AM_CONDITIONAL(USE_MYSQL, test x$mysql = xtrue)
@@ -645,6 +657,7 @@ AC_OUTPUT(
 	src/libstrongswan/plugins/sha2/Makefile
 	src/libstrongswan/plugins/fips_prf/Makefile
 	src/libstrongswan/plugins/gmp/Makefile
+	src/libstrongswan/plugins/random/Makefile
 	src/libstrongswan/plugins/hmac/Makefile
 	src/libstrongswan/plugins/x509/Makefile
 	src/libstrongswan/plugins/curl/Makefile