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PK: use PSA to complete public key when USE_PSA is enabled. #7388

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mpg opened this issue Apr 3, 2023 · 0 comments · Fixed by #7392
Closed

PK: use PSA to complete public key when USE_PSA is enabled. #7388

mpg opened this issue Apr 3, 2023 · 0 comments · Fixed by #7392
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@valeriosetti
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component-crypto Crypto primitives and low-level interfaces enhancement size-s Estimated task size: small (~2d)

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@mpg
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mpg commented Apr 3, 2023 •
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Context: see #6839; this is a step towards ECPa.PK.

Currently, pk_parse_key_sec1_der() will call mbedtls_ecp_mul() in some circumstances (public key not included, or not in a format we can read, namely compressed with some curves). This is a dependency on ECP arithmetic, which we're trying to avoid.

Instead, when MBEDTLS_USE_PSA_CRYPTO is enabled, we can use an approach based on psa_import() + psa_export_public(). Let's do that.

Prototype: #7357
@mpg mpg added enhancement component-crypto Crypto primitives and low-level interfaces size-m Estimated task size: medium (~1w) labels Apr 3, 2023
@mpg mpg mentioned this issue Apr 3, 2023
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@valeriosetti valeriosetti self-assigned this Apr 3, 2023
@valeriosetti valeriosetti mentioned this issue Apr 3, 2023
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@mpg mpg added size-s Estimated task size: small (~2d) and removed size-m Estimated task size: medium (~1w) labels Apr 4, 2023
@mpg mpg closed this as completed in #7392 Apr 11, 2023
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PK: use PSA to complete public key when USE_PSA is enabled valeriosetti/mbedtls
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