tree 931a8e9c4d9056e382e644ba1b4a358e538b8759
parent 30cb1ac23eac08bd3dafc331262dfe589ecf28b8
author Hanno Becker <hanno.becker@arm.com> 1550672445 +0000
committer Hanno Becker <hanno.becker@arm.com> 1561449625 +0100

Reduce code-size of mbedtls_asn1_get_alg()

The previous code
- checked that at least 1 byte of ASN.1 tag data is available,
- read and stored that ASN.1 tag,
- called the ASN.1 parsing function, part of which is checking
  that enough space is available and that the ASN.1 tag matches
  the expected value MBEDTLS_ASN1_OID.

Since the ASN.1 parsing function includes bounds checks,
this can be streamlined to:
- call the ASN.1 parsing function directly,
- on success, store MBEDTLS_ASN1_OID in the tag field.

This commit applies this simplification to mbedtls_asn1_get_alg().