feat/mtls-support-cert-script

Author: progressive-kiwi

.gitignore

@@ -1,3 +1,6 @@
 newt
 .DS_Store
-bin/
+bin/
+.idea
+*.iml
+certs/

self-signed-certs-for-mtls.sh

@@ -0,0 +1,125 @@
+#!/usr/bin/env bash
+set -eu
+
+echo -n "Enter username for certs (eg alice): "
+read CERT_USERNAME
+echo
+
+echo -n "Enter domain of user (eg example.com): "
+read DOMAIN
+echo
+
+# Prompt for password at the start
+echo -n "Enter password for certificate: "
+read -s PASSWORD
+echo
+echo -n "Confirm password: "
+read -s PASSWORD2
+echo
+
+if [ "$PASSWORD" != "$PASSWORD2" ]; then
+    echo "Passwords don't match!"
+    exit 1
+fi
+CA_DIR="./certs/ca"
+CLIENT_DIR="./certs/clients"
+FILE_PREFIX=$(echo "$CERT_USERNAME-at-$DOMAIN" | sed 's/\./-/')
+
+mkdir -p "$CA_DIR"
+mkdir -p "$CLIENT_DIR"
+
+if [ ! -f "$CA_DIR/ca.crt" ]; then
+# Generate CA private key
+  openssl genrsa -out "$CA_DIR/ca.key" 4096
+  echo "CA key ✅"
+
+  # Generate CA root certificate
+  openssl req -x509 -new -nodes \
+    -key "$CA_DIR/ca.key" \
+    -sha256 \
+    -days 3650 \
+    -out "$CA_DIR/ca.crt" \
+    -subj "/C=US/ST=State/L=City/O=Organization/OU=Unit/CN=ca.$DOMAIN"
+
+  echo "CA cert ✅"
+fi
+
+# Generate client private key
+openssl genrsa -aes256 -passout pass:"$PASSWORD" -out "$CLIENT_DIR/$FILE_PREFIX.key" 2048
+echo "Client key ✅"
+
+# Generate client Certificate Signing Request (CSR)
+openssl req -new \
+  -key "$CLIENT_DIR/$FILE_PREFIX.key" \
+  -out "$CLIENT_DIR/$FILE_PREFIX.csr" \
+  -passin pass:"$PASSWORD" \
+  -subj "/C=US/ST=State/L=City/O=Organization/OU=Unit/CN=$CERT_USERNAME@$DOMAIN"
+echo "Client cert ✅"
+
+echo -n "Signing client cert..."
+# Create client certificate configuration file
+cat > "$CLIENT_DIR/$FILE_PREFIX.ext" << EOF
+authorityKeyIdentifier=keyid,issuer
+basicConstraints=CA:FALSE
+keyUsage = digitalSignature, nonRepudiation, keyEncipherment, dataEncipherment
+subjectAltName = @alt_names
+
+[alt_names]
+DNS.1 = $DOMAIN
+EOF
+
+# Generate client certificate signed by CA
+openssl x509 -req \
+  -in "$CLIENT_DIR/$FILE_PREFIX.csr" \
+  -CA "$CA_DIR/ca.crt" \
+  -CAkey "$CA_DIR/ca.key" \
+  -CAcreateserial \
+  -out "$CLIENT_DIR/$FILE_PREFIX.crt" \
+  -days 365 \
+  -sha256 \
+  -extfile "$CLIENT_DIR/$FILE_PREFIX.ext"
+
+# Verify the client certificate
+openssl verify -CAfile "$CA_DIR/ca.crt" "$CLIENT_DIR/$FILE_PREFIX.crt"
+echo "Signed ✅"
+
+# Create encrypted PEM bundle
+openssl rsa -in "$CLIENT_DIR/$FILE_PREFIX.key" -passin pass:"$PASSWORD" \
+    | cat "$CLIENT_DIR/$FILE_PREFIX.crt" - > "$CLIENT_DIR/$FILE_PREFIX-bundle.enc.pem"
+
+
+# Convert to PKCS12
+echo "Converting to PKCS12 format..."
+openssl pkcs12 -export \
+  -out "$CLIENT_DIR/$FILE_PREFIX.enc.p12" \
+  -inkey "$CLIENT_DIR/$FILE_PREFIX.key" \
+  -in "$CLIENT_DIR/$FILE_PREFIX.crt" \
+  -certfile "$CA_DIR/ca.crt" \
+  -name "$CERT_USERNAME@$DOMAIN" \
+  -passin pass:"$PASSWORD" \
+  -passout pass:"$PASSWORD"
+echo "Converted to encrypted p12 for macOS ✅"
+
+# Convert to PKCS12 format without encryption
+echo "Converting to non-encrypted PKCS12 format..."
+openssl pkcs12 -export \
+  -out "$CLIENT_DIR/$FILE_PREFIX.p12" \
+  -inkey "$CLIENT_DIR/$FILE_PREFIX.key" \
+  -in "$CLIENT_DIR/$FILE_PREFIX.crt" \
+  -certfile "$CA_DIR/ca.crt" \
+  -name "$CERT_USERNAME@$DOMAIN" \
+  -passin pass:"$PASSWORD" \
+  -passout pass:""
+echo "Converted to non-encrypted p12  ✅"
+
+# Clean up intermediate files
+rm "$CLIENT_DIR/$FILE_PREFIX.csr" "$CLIENT_DIR/$FILE_PREFIX.ext" "$CA_DIR/ca.srl"
+echo
+echo
+
+echo "CA certificate:     $CA_DIR/ca.crt"
+echo "CA private key:     $CA_DIR/ca.key"
+echo "Client certificate: $CLIENT_DIR/$FILE_PREFIX.crt"
+echo "Client private key: $CLIENT_DIR/$FILE_PREFIX.key"
+echo "Client cert bundle: $CLIENT_DIR/$FILE_PREFIX.p12"
+echo "Client cert bundle (encrypted): $CLIENT_DIR/$FILE_PREFIX.enc.p12"