Adding functions for message_4 #1144

Job	Run time
generate-fstar	2m 1s
check-style	16s
test-lakers-python	1m 8s
unit-tests (lakers-crypto/psa, ead-none)	53s
unit-tests-default	50s
unit-tests (lakers-crypto/psa, ead-authz)	52s
unit-tests (lakers-crypto/rustcrypto, ead-none)	40s
unit-tests (lakers-crypto/rustcrypto, ead-authz)	48s
run-example-on-qemu (crypto-psa)	1m 33s
build-edhoc-package (lakers-crypto/psa)	1m 19s
build-coap-example	52s
build-example-for-cortex-m4 (crypto-psa)	1m 37s
build-edhoc-package (lakers-crypto/psa-baremetal)	1m 14s
build-lakers-c (crypto-rustcrypto)	1m 19s
build-edhoc-package (lakers-crypto/cryptocell310)	1m 24s
build-example-for-cortex-m4 (crypto-cryptocell310)	1m 7s
build-lakers-c (crypto-psa-baremetal)	1m 13s
build-edhoc-package (lakers-crypto/rustcrypto)	1m 3s
build-lakers-c (crypto-cryptocell310)	1m 17s
build-lakers-c-example	1m 32s
release	0s
	22m 58s

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