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driver-only-builds: add Restrictions section

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Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
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Valerio Setti 2023-12-20 17:06:13 +01:00
parent d834896c8b
commit 66134661cd
1 changed files with 10 additions and 1 deletions
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docs/driver-only-builds.md
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@ -290,6 +290,15 @@ operations of that type requested through the PSA Crypto API are performed by
the driver. Only functions belonging to legacy modules which are disabled won't the driver. Only functions belonging to legacy modules which are disabled won't
be available in this configuration. be available in this configuration.
### Restrictions
- If an algorithm other than GCM and CCM (see
["Partial acceleration for CCM/GCM"](#partial-acceleration-for-ccmgcm) below)
is enabled but not accelerated, then all key types than can be used with it
will need to be built-in;
- if a key type is enabled but not accelerated, then all algorithms than can be
used with it will need to be built-in.
### Legacy <-> PSA matching ### Legacy <-> PSA matching
It should be noticed that the matching between legacy (i.e. `MBEDTLS_xxx_C`) It should be noticed that the matching between legacy (i.e. `MBEDTLS_xxx_C`)
@ -339,7 +348,7 @@ but they can also rely on the legacy modules (`MBEDTLS_[CCM|GCM|CHACHAPOLY]`)
with the following conditions on the underlying key types: with the following conditions on the underlying key types:
- CCM/GCM can either use legacy key type modules `MBEDTLS_[AES|ARIA|CAMELLIA]_C` - CCM/GCM can either use legacy key type modules `MBEDTLS_[AES|ARIA|CAMELLIA]_C`
or their accelerated version, as described in section or their accelerated version, as described in section
["Partial acceleration for CCM/GCM"](#partial-acceleration-for-CCM/GCM). ["Partial acceleration for CCM/GCM"](#partial-acceleration-for-ccmgcm).
- ChaChaPoly instead can only rely on legacy key type module `MBEDTLS_CHACHA20_C` - ChaChaPoly instead can only rely on legacy key type module `MBEDTLS_CHACHA20_C`
and algorithm `MBEDTLS_POLY1305_C`. and algorithm `MBEDTLS_POLY1305_C`.