Port of mbed TLS

Thanks to Menno Valkema for the initial patch.

Fixes #17

lib/mk/mbedtls.mk

@@ -0,0 +1,83 @@
+MBEDTLS_PORT_DIR := $(call select_from_ports,mbedtls)
+MBEDTLS_DIR      := $(MBEDTLS_PORT_DIR)/src/lib/mbedtls/
+
+LIBS += libc 
+
+INC_DIR += $(MBEDTLS_PORT_DIR)/include/mbedtls
+
+CC_OLEVEL = -O2
+
+SRC_C = aes.c\
+	aesni.c\
+	arc4.c\
+	asn1parse.c\
+	asn1write.c\
+	base64.c\
+	bignum.c\
+	blowfish.c\
+	camellia.c\
+	ccm.c\
+	certs.c\
+	cipher.c\
+	cipher_wrap.c\
+	ctr_drbg.c\
+	debug.c\
+	des.c\
+	dhm.c\
+	ecdh.c\
+	ecdsa.c\
+	ecjpake.c\
+	ecp.c\
+	ecp_curves.c\
+	entropy.c\
+	entropy_poll.c\
+	error.c\
+	gcm.c\
+	havege.c\
+	hmac_drbg.c\
+	md2.c\
+	md4.c\
+	md5.c\
+	md.c\
+	md_wrap.c\
+	memory_buffer_alloc.c\
+	net.c\
+	oid.c\
+	padlock.c\
+	pem.c\
+	pk.c\
+	pkcs11.c\
+	pkcs12.c\
+	pkcs5.c\
+	pkparse.c\
+	pk_wrap.c\
+	pkwrite.c\
+	platform.c\
+	ripemd160.c\
+	rsa.c\
+	sha1.c\
+	sha256.c\
+	sha512.c\
+	ssl_cache.c\
+	ssl_ciphersuites.c\
+	ssl_cli.c\
+	ssl_cookie.c\
+	ssl_srv.c\
+	ssl_ticket.c\
+	ssl_tls.c\
+	threading.c\
+	timing.c\
+	version.c\
+	version_features.c\
+	x509.c\
+	x509_create.c\
+	x509_crl.c\
+	x509_crt.c\
+	x509_csr.c\
+	x509write_crt.c\
+	x509write_csr.c\
+	xtea.c
+
+vpath %.c $(MBEDTLS_DIR)/library
+
+SHARED_LIB = yes