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Change sha256 output type from an array to a pointer

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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>
This commit is contained in:
Gilles Peskine 2021-05-13 00:45:25 +02:00
parent 3e3a6789d1
commit d7b3d92476
4 changed files with 17 additions and 14 deletions
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12
include/mbedtls/sha256.h
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@ -127,13 +127,14 @@ int mbedtls_sha256_update_ret( mbedtls_sha256_context *ctx,
* \param ctx The SHA-256 context. This must be initialized
* and have a hash operation started.
* \param output The SHA-224 or SHA-256 checksum result.
* This must be a writable buffer of length \c 32 Bytes.
* This must be a writable buffer of length \c 32 bytes
* for SHA-256, 28 bytes for SHA-224.
*
* \return \c 0 on success.
* \return A negative error code on failure.
*/
int mbedtls_sha256_finish_ret( mbedtls_sha256_context *ctx,
unsigned char output[32] );
unsigned char *output );
/**
* \brief This function processes a single data block within
@ -163,14 +164,15 @@ int mbedtls_internal_sha256_process( mbedtls_sha256_context *ctx,
* \param input The buffer holding the data. This must be a readable
* buffer of length \p ilen Bytes.
* \param ilen The length of the input data in Bytes.
* \param output The SHA-224 or SHA-256 checksum result. This must
* be a writable buffer of length \c 32 Bytes.
* \param output The SHA-224 or SHA-256 checksum result.
* This must be a writable buffer of length \c 32 bytes
* for SHA-256, 28 bytes for SHA-224.
* \param is224 Determines which function to use. This must be
* either \c 0 for SHA-256, or \c 1 for SHA-224.
*/
int mbedtls_sha256_ret( const unsigned char *input,
size_t ilen,
unsigned char output[32],
unsigned char *output,
int is224 );
#if defined(MBEDTLS_SELF_TEST)