Prepping to write a DTLS module

I'm gonna try my best to use WASM so that the end product stays memory safe, but if I have to switch back to FFI then whatever.

Author: evan-brass

.gitignore

@@ -1,3 +1,2 @@
-dist
+*.wasm
 *.pem
-*.so

Makefile

@@ -0,0 +1,9 @@
+
+relay/mbedtls.wasm: vendor/mbedtls/library/* vendor/mbedtls/include/* c-src/*
+	/opt/wasi-sdk/bin/wasm32-wasi-clang -O3 \
+		-Ic-src -Ivendor/mbedtls/include \
+		-DMBEDTLS_CONFIG_FILE=\"config.h\" \
+		-fvisibility=default \
+		-Wl,--export-dynamic,--export=malloc,--export=free,--export=strlen \
+		-o $@ \
+		$(filter %.c, $^)

c-src/config.h

@@ -0,0 +1 @@
+#define MBEDTLS_PLATFORM_NO_STD_FUNCTIONS

docs/ciphersuites.md

@@ -0,0 +1,24 @@
+- Chrome's Ciphersuites:
+	- TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
+	- TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
+	- TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256
+	- TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256
+	- TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
+	- TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
+	- TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
+	- TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
+	- TLS_RSA_WITH_AES_128_GCM_SHA256
+	- TLS_RSA_WITH_AES_128_CBC_SHA
+	- TLS_RSA_WITH_AES_256_CBC_SHA
+- Firefox's Ciphersuites:
+	- TLS_AES_128_GCM_SHA256
+	- TLS_CHACHA20_POLY1305_SHA256
+	- TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
+	- TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
+	- TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256
+	- TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256
+	- TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
+	- TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
+- Prefered Ciphersuites:
+	- TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
+	- TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256