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Document existing dependency of MD_C

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Trying to compile MD_C without any of the hash modules would result in a
bunch of unused parameter warning (hence errors in -Werror builds).

We could silence those warnings by casting the parameters to void, but
still, compiling the module in such a configuration would mean all of
its functions are useless (always returning an error).

Seems better to just document the dependency.

Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
This commit is contained in:
Manuel Pégourié-Gonnard 2022-07-18 12:04:05 +02:00
parent 8c7b81cdf9
commit 1f7f7172dc
2 changed files with 14 additions and 0 deletions
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11
include/mbedtls/check_config.h
View file

@ -329,6 +329,17 @@
#error "!MBEDTLS_SSL_KEEP_PEER_CERTIFICATE requires MBEDTLS_SHA512_C, MBEDTLS_SHA256_C or MBEDTLS_SHA1_C"
#endif
#if defined(MBEDTLS_MD_C) && !( \
defined(MBEDTLS_MD5_C) || \
defined(MBEDTLS_RIPEMD160_C) || \
defined(MBEDTLS_SHA1_C) || \
defined(MBEDTLS_SHA224_C) || \
defined(MBEDTLS_SHA256_C) || \
defined(MBEDTLS_SHA384_C) || \
defined(MBEDTLS_SHA512_C) )
#error "MBEDTLS_MD_C defined, but not all prerequisites"
#endif
#if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C) && \
( !defined(MBEDTLS_PLATFORM_C) || !defined(MBEDTLS_PLATFORM_MEMORY) )
#error "MBEDTLS_MEMORY_BUFFER_ALLOC_C defined, but not all prerequisites"

3
include/mbedtls/mbedtls_config.h
View file

@ -2423,6 +2423,9 @@
*
* Enable the generic message digest layer.
*
* Requires: one of: MBEDTLS_MD5_C, MBEDTLS_RIPEMD160_C, MBEDTLS_SHA1_C,
* MBEDTLS_SHA224_C, MBEDTLS_SHA256_C, MBEDTLS_SHA384_C,
* MBEDTLS_SHA512_C.
* Module: library/md.c
* Caller: library/constant_time.c
* library/ecdsa.c