API: Use u8 instead of hex str #317

Job	Run time
check-style	13s
unit-tests (cb-hacspec, ead-none)	1m 8s
unit-tests (cb-hacspec, ead-zeroconf)	58s
unit-tests (cb-psa, ead-none)	1m 8s
unit-tests (cb-psa, ead-zeroconf)	1m 18s
build-coap-example	1m 44s
build-static-lib-and-headers (cb-psa-baremetal)	2m 11s
build-example-for-cortex-m4 (cb-psa, ead-none)	1m 50s
build-static-lib-and-headers (cb-cryptocell310)	1m 29s
build-edhoc-package (cb-hacspec, ead-none)	2m 9s
build-example-for-cortex-m4 (cb-psa, ead-zeroconf)	2m 22s
generate-fstar	15m 58s
build-edhoc-package (cb-hacspec, ead-zeroconf)	1m 36s
build-example-for-cortex-m4 (cb-cryptocell310, ead-none)	1m 27s
run-example-on-qemu (cb-psa, ead-none)	1m 54s
build-edhoc-package (cb-psa, ead-none)	1m 46s
build-example-for-cortex-m4 (cb-cryptocell310, ead-zeroconf)	1m 59s
run-example-on-qemu (cb-psa, ead-zeroconf)	2m 4s
build-edhoc-package (cb-psa, ead-zeroconf)	1m 56s
build-edhoc-package (cb-psa-baremetal, ead-none)	1m 35s
build-edhoc-package (cb-psa-baremetal, ead-zeroconf)	1m 49s
build-edhoc-package (cb-cryptocell310, ead-none)	1m 23s
build-edhoc-package (cb-cryptocell310, ead-zeroconf)	1m 23s
release	0s
	51m 20s

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