tree 4e5dde018d297677f6426887afeaab625863f618
parent f226998fa25f5a3cd17eb48b542fa36907dc8b37
author Hanno Becker <hanno.becker@arm.com> 1550769226 +0000
committer Hanno Becker <hanno.becker@arm.com> 1561449986 +0100

Remove `sig_oid` parameter from mbedtls_x509_sig_alg_gets()

The function `mbedtls_x509_sig_alg_gets()` previously needed the
raw ASN.1 OID string even though it is implicit in the PK and MD
parameters.

This commit modifies `mbedtls_x509_sig_alg_gets()` to infer the OID
and remove it from the parameters.

This will be needed for the new X.509 CRT structure which will
likely not store the signature OID.

Care has to be taken to handle the case of RSASSA-PSS correctly,
where the hash algorithm in the OID list is set to MBEDTLS_MD_NONE
because it's only determined by the algorithm parameters.