For each function in `x509_oid.c`, determine where it is used and only
include it in the build if it is needed by the X.509 code. Define the
corresponding internal tables only when they are consumed by a function.
This makes Mbed TLS completely independent of the compilation option
`MBEDTLS_OID_C`. This option remains present only in sample configs for
crypto, where it must stay until TF-PSA-Crypto no longer relies on this
option.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Replace the non-X.509-named error code `MBEDTLS_ERR_OID_NOT_FOUND` with
`MBEDTLS_ERR_X509_UNKNOWN_OID`, which already exists and is currently not
used for anything.
Public functions in X.509 propagate this error code, so it needs to have a
public name.
Remove the definition of `MBEDTLS_ERR_OID_NOT_FOUND` in `x509_oid.h`, then
```
git grep -l MBEDTLS_ERR_OID_NOT_FOUND | xargs perl -i -pe 's/\bMBEDTLS_ERR_OID_NOT_FOUND\b/MBEDTLS_ERR_X509_UNKNOWN_OID/g'
```
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
The OID module is used by both crypto and X.509. It has moved to the
`tf-psa-crypto` subdirectory, and the sibling commit
08d8cc57dbe7be54fe3f88ecbc2729300c48d450 removes this subdirectory from the
`mbedtls` repository in order to make `tf-psa-crypto` a submodule. We want
to access the relevant parts directly from X.509 rather than go through the
crypto repository, because OID functions are only accessible as private
interfaces, and crypto doesn't know when a particular OID function is needed
in the build since it depends on X.509 configuration options.
Make a copy of the OID module and its unit tests. In a follow-up, the X.509
module will switch to consuming this copy rather than the one that went into
TF-PSA-Crypto.
Rename the files from `*oid*` to `*x509_oid*` to follow the naming
convention that submodules of X.509 are prefixed with `x509`. This also
avoids file name clashes with TF-PSA-Crypto.
Since OID is not a public interface of Mbed TLS 4.x, move the header file
into `library`.
This commit only makes the files available. Subsequent commits will take
care of making these files used in the build.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
