Feature/mbedtls (#84)

* try to import mbedtls and build it

* add stubs socket class

* some boilterplate, read and write function implemented

* more boilterplate / current error in handshake because no CA cert is setup

* add something so skip ca verification, can ws curl https://google.com !

* cleanup / close implemented

* tweak CMakefiles

* typo in include

* update readme

* disable unittests

third_party/mbedtls/crypto/tests/scripts/gen_gcm_decrypt.pl

@@ -0,0 +1,98 @@
+#!/usr/bin/env perl
+#
+# Based on NIST gcmDecryptxxx.rsp validation files
+# Only first 3 of every set used for compile time saving
+
+use strict;
+
+my $file = shift;
+
+open(TEST_DATA, "$file") or die "Opening test cases '$file': $!";
+
+sub get_suite_val($)
+{
+    my $name = shift;
+    my $val = "";
+
+    while(my $line = <TEST_DATA>)
+    {
+        next if ($line !~ /^\[/);
+        ($val) = ($line =~ /\[$name\s\=\s(\w+)\]/);
+        last;
+    }
+
+    return $val;
+}
+
+sub get_val($)
+{
+    my $name = shift;
+    my $val = "";
+    my $line;
+
+    while($line = <TEST_DATA>)
+    {
+        next if($line !~ /=/);
+        last;
+    }
+
+    ($val) = ($line =~ /^$name = (\w+)/);
+
+    return $val;
+}
+
+sub get_val_or_fail($)
+{
+    my $name = shift;
+    my $val = "FAIL";
+    my $line;
+
+    while($line = <TEST_DATA>)
+    {
+        next if($line !~ /=/ && $line !~ /FAIL/);
+        last;
+    }
+
+    ($val) = ($line =~ /^$name = (\w+)/) if ($line =~ /=/);
+
+    return $val;
+}
+
+my $cnt = 1;;
+while (my $line = <TEST_DATA>)
+{
+    my $key_len = get_suite_val("Keylen");
+    next if ($key_len !~ /\d+/);
+    my $iv_len = get_suite_val("IVlen");
+    my $pt_len = get_suite_val("PTlen");
+    my $add_len = get_suite_val("AADlen");
+    my $tag_len = get_suite_val("Taglen");
+
+    for ($cnt = 0; $cnt < 3; $cnt++)
+    {
+        my $Count = get_val("Count");
+        my $key = get_val("Key");
+        my $iv = get_val("IV");
+        my $ct = get_val("CT");
+        my $add = get_val("AAD");
+        my $tag = get_val("Tag");
+        my $pt = get_val_or_fail("PT");
+
+        print("GCM NIST Validation (AES-$key_len,$iv_len,$pt_len,$add_len,$tag_len) #$Count\n");
+        print("gcm_decrypt_and_verify");
+        print(":\"$key\"");
+        print(":\"$ct\"");
+        print(":\"$iv\"");
+        print(":\"$add\"");
+        print(":$tag_len");
+        print(":\"$tag\"");
+        print(":\"$pt\"");
+        print(":0");
+        print("\n\n");
+    }
+}
+
+print("GCM Selftest\n");
+print("gcm_selftest:\n\n");
+
+close(TEST_DATA);