Generate self-signed certs for mitmproxy on macOS

Makefile

# Generate self-signed certificates for mitmproxy:
#     mitmproxy-ca.pem
#     mitmproxy-ca-cert.pem
#     mitmproxy-dhparam.pem
#
# Usage:
# 	Put this make file in ~/.mitmproxy/Makfile and run make

all: mitmproxy-dhparam.pem mitmproxy-ca.pem mitmproxy-ca-cert.pem

mitmproxy-ca.pem: mitmproxy-ca.key mitmproxy-ca-cert.pem
	cat mitmproxy-ca.key mitmproxy-ca-cert.pem > mitmproxy-ca.pem

mitmproxy-ca-cert.pem: mitmproxy-ca.key
	openssl req -new -x509 -key mitmproxy-ca.key \
		-out mitmproxy-ca-cert.pem -days 3650 -subj /CN=MitmProxyReplaceMe
	# Trust the cert we generated
	sudo security add-trusted-cert -d -r trustRoot \
		-k /Library/Keychains/System.keychain mitmproxy-ca-cert.pem

mitmproxy-ca.key:
	openssl genrsa -out mitmproxy-ca.key 2048

mitmproxy-dhparam.pem:
	openssl dhparam -out mitmproxy-dhparam.pem 2048