sgx_pubkey_hash_gen

#!/usr/bin/env bash
#
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if test $# -eq 1 && test -f $1; then
	(openssl version) >/dev/null 2>&1 || (echo "Error: openssl not found." && exit 1)
	(xxd -v) >/dev/null 2>&1 || (echo "Error: xxd not found." && exit 1)
	(perl -v) >/dev/null 2>&1 || (echo "Error: perl not found." && exit 1)

	PUBKEY=$(openssl rsa -pubin -in $1 -modulus -noout)
	test $? -ne 0 && echo "Error: Invalid public key file." && exit 1
	echo $PUBKEY | cut -d= -f2 | xxd -r -p | perl -0777 -F -ape '$_=reverse@F' | openssl sha256 -binary | perl -0777 -F -ape '$_=reverse@F' | xxd -g8 -c8 -u | awk '{print $2}' | tac
else
	echo "Usage: $0 [PUBLIC_KEY_FILE]"
	echo ""
	echo "Generate SHA256 value of the enclave signer public key modulus to be written to the IA32_SGXPUBKEYHASH0..3 MSRs in order from hash0 to hash3."
fi