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Backport 2.16: wrong RSA_PRV_DER_MAX_BYTES for odd MBEDTLS_MPI_MAX_SIZE #4100

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merged 3 commits into from Feb 2, 2021

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d-otte
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@d-otte d-otte commented Feb 2, 2021

This is a backport to the mbedtls v2.16 branch of PR #4094 regarding issue #4093

if MBEDTLS_MPI_MAX_SIZE is odd then RSA_PRV_DER_MAX_BYTES will be two less than expected, since the macros are lacking parentheses.


Signed-off-by: Daniel Otte <d.otte@wut.de>
Avoid confusion and possible mistakes in usage of macros.

Signed-off-by: Daniel Otte <d.otte@wut.de>
Signed-off-by: Daniel Otte <d.otte@wut.de>
@chris-jones-arm chris-jones-arm added bug Community component-crypto Crypto primitives and low-level interfaces needs-reviewer This PR needs someone to pick it up for review labels Feb 2, 2021
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Looks like a complete, faithful backport to me.

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@yanesca yanesca left a comment

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This is a faithful backport of the original.

@yanesca yanesca added approved Design and code approved - may be waiting for CI or backports and removed needs-reviewer This PR needs someone to pick it up for review labels Feb 2, 2021
@yanesca yanesca merged commit fee234a into Mbed-TLS:mbedtls-2.16 Feb 2, 2021
OBSOLETE - PLEASE SEE https://github.com/orgs/Mbed-TLS/projects/2 automation moved this from Has Approval to Done Feb 2, 2021
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wrong RSA_PRV_DER_MAX_BYTES for odd MBEDTLS_MPI_MAX_SIZE
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