Adding functions for message_4 #1146

Job	Run time
check-style	16s
generate-fstar	2m 13s
test-lakers-python	52s
unit-tests-default	54s
unit-tests (lakers-crypto/psa, ead-none)	56s
unit-tests (lakers-crypto/psa, ead-authz)	55s
unit-tests (lakers-crypto/rustcrypto, ead-none)	43s
unit-tests (lakers-crypto/rustcrypto, ead-authz)	41s
build-coap-example	49s
build-example-for-cortex-m4 (crypto-psa)	1m 22s
build-lakers-c (crypto-rustcrypto)	1m 6s
build-edhoc-package (lakers-crypto/psa)	1m 43s
build-example-for-cortex-m4 (crypto-cryptocell310)	1m 20s
build-lakers-c (crypto-psa-baremetal)	1m 30s
build-lakers-c-example	1m 38s
build-edhoc-package (lakers-crypto/psa-baremetal)	3m 41s
build-lakers-c (crypto-cryptocell310)	1m 15s
build-edhoc-package (lakers-crypto/cryptocell310)	1m 28s
run-example-on-qemu (crypto-psa)	1m 55s
build-edhoc-package (lakers-crypto/rustcrypto)	1m 12s
release	0s
	26m 29s

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