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Change sha512 output type from an array to a pointer

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The output parameter of mbedtls_sha512_finish_ret and mbedtls_sha512_ret
now has a pointer type rather than array type. This removes spurious
warnings in some compilers when outputting a SHA-384 hash into a
48-byte buffer.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This commit is contained in:
Gilles Peskine
2021-05-13 00:22:35 +02:00
parent e0f06c624c
commit e02e02f203
4 changed files with 21 additions and 6 deletions
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docs/3.0-migration-guide.d/sha512-output-type.md Normal file
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SHA-512 output type change
--------------------------
The output parameter of `mbedtls_sha512_finish_ret()` and `mbedtls_sha512_ret()` now has a pointer type rather than array type. This makes no difference in terms of C semantics, but removes spurious warnings in some compilers when outputting a SHA-384 hash into a 48-byte buffer.
This makes no difference to a vast majority of applications. If your code takes a pointer to one of these functions, you may need to change the type of the pointer.
Alternative implementations of the SHA512 module must adjust their functions' prototype accordingly.