A port of mbedtls for 68k classic Macs. Designed to be built with the Retro68 GCC cross-compiler.
Allows a network-enabled 68k Mac to communicate with modern web endpoints over TLS 1.2. Original documentation for mbedtls is here.
From my limited testing so far, a 33mhz 68040 processor will complete a TLS handshake in about 15 seconds. Whereas a 16mhz 68030 will take about 70 seconds - during which time the remote server will timeout. So it looks like the minimum requirement is a 68040.
WARNING: Although this library allows communication over TLS 1.2 - it should be treated as NOT SECURE. So far, no Entropy sources have been written for the library which is a serious security issue. Also, classic Macs don't have a Root Certificate library which means you can't verify remote certificates.
Both of these can be fixed with a bit more work though...
mbedtls-Mac-68k requires Retro68 for compilation, and also the MacTCPHelper Library.
First build and install the MacTCPHelper library, then execute these commands from the top level of the mbedtls-Mac-68k directory:
cd ..
mkdir mbedtls-Mac-68k-build
cd mbedtls-Mac-68k-build
cmake ../mbedtls-Mac-68k -DCMAKE_TOOLCHAIN_FILE=<<YOUR_PATH_TO_Retro68-build>>/toolchain/m68k-apple-macos/cmake/retro68.toolchain.cmake
make install
This will compile the library and install the library and headers into the m68k-apple-macos toolchain.