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mbedtls/docs/3.0-migration-guide.d/sha512-output-type.md
Gilles Peskine d7b3d92476 Change sha256 output type from an array to a pointer 
The output parameter of mbedtls_sha256_finish_ret and mbedtls_sha256_ret
now has a pointer type rather than array type. This removes spurious
warnings in some compilers when outputting a SHA-224 hash into a
28-byte buffer.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2021-05-13 00:46:29 +02:00

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SHA-512 and SHA-256 output type change

The output parameter of mbedtls_sha256_finish_ret(), mbedtls_sha256_ret(), mbedtls_sha512_finish_ret(), 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 or a SHA-224 hash into a 28-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 SHA256 and SHA512 modules must adjust their functions' prototype accordingly.