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check_config.h: Check MBEDTLS_MD_SINGLE_HASH is used with single MD

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This commit modifies check_config.h to check that precisely one
hash is enabled if MBEDTLS_MD_SINGLE_HASH is set.

This is not only a reasonable expectation, it is also necessary,
because test suites assume that if a digest is enabled, it is also
accessible through the MD abstraction layer.
This commit is contained in:
Hanno Becker 2019-09-03 13:55:19 +01:00
parent c763e9dc70
commit 8fbacf941f
1 changed files with 67 additions and 0 deletions
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67
include/mbedtls/check_config.h
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@ -786,6 +786,73 @@
#define MBEDTLS_THREADING_IMPL
#endif
/* Ensurethat precisely one hash is enabled. */
#if defined(MBEDTLS_MD_SINGLE_HASH)
#if defined(MBEDTLS_SHA256_C)
#define MBEDTLS_SHA256_ENABLED 1
#else
#define MBEDTLS_SHA256_ENABLED 0
#endif /* MBEDTLS_SHA256_C */
#if defined(MBEDTLS_SHA256_C) && !defined(MBEDTLS_SHA256_NO_SHA224)
#define MBEDTLS_SHA224_ENABLED 1
#else
#define MBEDTLS_SHA224_ENABLED 0
#endif /* MBEDTLS_SHA256_C && !MBEDTLS_SHA256_NO_SHA224 */
#if defined(MBEDTLS_SHA512_C)
#define MBEDTLS_SHA512_ENABLED 2
#else
#define MBEDTLS_SHA512_ENABLED 0
#endif /* MBEDTLS_SHA512_C */
#if defined(MBEDTLS_SHA1_C)
#define MBEDTLS_SHA1_ENABLED 1
#else
#define MBEDTLS_SHA1_ENABLED 0
#endif /* MBEDTLS_SHA1_C */
#if defined(MBEDTLS_MD2_C)
#define MBEDTLS_MD2_ENABLED 1
#else
#define MBEDTLS_MD2_ENABLED 0
#endif /* MBEDTLS_MD2_C */
#if defined(MBEDTLS_MD4_C)
#define MBEDTLS_MD4_ENABLED 1
#else
#define MBEDTLS_MD4_ENABLED 0
#endif /* MBEDTLS_MD4_C */
#if defined(MBEDTLS_MD5_C)
#define MBEDTLS_MD5_ENABLED 1
#else
#define MBEDTLS_MD5_ENABLED 0
#endif /* MBEDTLS_MD5_C */
#if defined(MBEDTLS_RIPEMD160_C)
#define MBEDTLS_RIPEMD160_ENABLED 1
#else
#define MBEDTLS_RIPEMD160_ENABLED 0
#endif /* MBEDTLS_RIPEMD160_C */
#define MBEDTLS_HASHES_ENABLED \
( MBEDTLS_MD2_ENABLED + \
MBEDTLS_MD4_ENABLED + \
MBEDTLS_MD5_ENABLED + \
MBEDTLS_RIPEMD160_ENABLED + \
MBEDTLS_SHA1_ENABLED + \
MBEDTLS_SHA256_ENABLED + \
MBEDTLS_SHA512_ENABLED )
#if MBEDTLS_HASHES_ENABLED != 1
#error "MBEDTLS_MD_SINGLE_HASH must be used with precisely one hash algorithm enabled."
#endif
#undef MBEDTLS_HASHES_ENABLED
#endif /* MBEDTLS_MD_SINGLE_HASH */
#if defined(MBEDTLS_THREADING_ALT)
#if !defined(MBEDTLS_THREADING_C) || defined(MBEDTLS_THREADING_IMPL)
#error "MBEDTLS_THREADING_ALT defined, but not all prerequisites"