Some notes on using PSK.

Rebuild wolfSSL, create static shared library in $HOME/wolfssl-install-psk.

make clean
make distclean
rm -rf "$HOME/wolfssl-install-psk"

./configure --enable-all --disable-crypttests \
            --disable-examples \
            --enable-opensslall --enable-opensslextra \
            --enable-tls13 --enable-dtls13 --enable-dtls --enable-psk \
            CFLAGS="-DWOLFSSL_STATIC_PSK" --enable-shared \
            --prefix="$HOME/wolfssl-install-psk"

make
make install

Build client-dtls-callback example

See https://github.com/wolfSSL/wolfssl-examples/blob/master/dtls/client-dtls-callback.c

Cloned in WSL here to directory: C:\workspace\wolfssl-examples-gojimmypi.

Edit port number as appropriate. Default is 11111.

cd /mnt/c/workspace/wolfssl-examples-gojimmypi/dtls

export WOLFSSL_DIR="$HOME/wolfssl-install-psk"
export CFLAGS="-I$WOLFSSL_DIR/include"
export LDFLAGS="-L$WOLFSSL_DIR/lib"

export LD_LIBRARY_PATH="$HOME/wolfssl-install-psk/lib:$LD_LIBRARY_PATH"

gcc -o client-dtls-psk client-dtls-psk.c \
    -I$HOME/wolfssl-install-psk/include \
    -L$HOME/wolfssl-install-psk/lib -Wl,-rpath=$HOME/wolfssl-install-psk/lib -lwolfssl -lm

ldd $HOME/wolfssl-install-psk/lib/libwolfssl.so

./configure --disable-crypttests \
            --disable-examples \
            --enable-psk --enable-dtls --enable-dtls13   \
            --enable-aesccm --enable-aesgcm --enable-hkdf \
            --enable-rsa --enable-curve25519 --enable-ed25519 \
            CFLAGS="-DWOLFSSL_STATIC_PSK" --enable-shared \
            --prefix="$HOME/wolfssl-install-psk"

client-dtls-psk 127.0.0.1

WIP testing

wolfSSL install check:

cd C:\workspace\wolfssl-gojimmypi\wrapper\CSharp\Debug\x64\
dir *.dll
dumpbin /exports wolfssl.dll | Select-String psk

Client:

cd /mnt/c/workspace/wolfssl-examples-gojimmypi/dtls
/mytest.sh