Separate SHA224 from SHA256 config options.

These options are still dependant on each other.
This is an intermediate step.

Signed-off-by: Mateusz Starzyk <mateusz.starzyk@mobica.com>

include/mbedtls/check_config.h

@@ -622,6 +622,14 @@
 #error "MBEDTLS_SHA384_C defined without MBEDTLS_SHA512_C"
 #endif
 
+#if defined(MBEDTLS_SHA224_C) && !defined(MBEDTLS_SHA256_C)
+#error "MBEDTLS_SHA224_C defined without MBEDTLS_SHA256_C"
+#endif
+
+#if defined(MBEDTLS_SHA256_C) && !defined(MBEDTLS_SHA224_C)
+#error "MBEDTLS_SHA256_C defined without MBEDTLS_SHA224_C"
+#endif
+
 #if defined(MBEDTLS_SSL_PROTO_TLS1) && ( !defined(MBEDTLS_MD5_C) ||     \
     !defined(MBEDTLS_SHA1_C) )
 #error "MBEDTLS_SSL_PROTO_TLS1 defined, but not all prerequisites"

include/mbedtls/config.h

@@ -3107,7 +3107,7 @@
 /**
  * \def MBEDTLS_SHA256_C
  *
- * Enable the SHA-224 and SHA-256 cryptographic hash algorithms.
+ * Enable the SHA-256 cryptographic hash algorithms.
  *
  * Module:  library/sha256.c
  * Caller:  library/entropy.c
@@ -3116,11 +3116,30 @@
  *          library/ssl_srv.c
  *          library/ssl_tls.c
  *
- * This module adds support for SHA-224 and SHA-256.
+ * This module adds support for SHA-256.
+ * This module is required for SHA-244.
  * This module is required for the SSL/TLS 1.2 PRF function.
  */
 #define MBEDTLS_SHA256_C
 
+/**
+ * \def MBEDTLS_SHA224_C
+ *
+ * Enable the SHA-224 cryptographic hash algorithms.
+ *
+ * Module:  library/sha256.c
+ * Caller:  library/entropy.c
+ *          library/md.c
+ *          library/ssl_cli.c
+ *          library/ssl_srv.c
+ *          library/ssl_tls.c
+ *
+ * Requires: MBEDTLS_SHA256_C
+ * This module adds support for SHA-224.
+ * This module is required for the SSL/TLS 1.2 PRF function.
+ */
+#define MBEDTLS_SHA224_C
+
 /**
  * \def MBEDTLS_SHA512_C
  *

include/mbedtls/config_psa.h

@@ -149,7 +149,7 @@ extern "C" {
 
 #if defined(PSA_WANT_ALG_SHA_224) && !defined(MBEDTLS_PSA_ACCEL_ALG_SHA_224)
 #define MBEDTLS_PSA_BUILTIN_ALG_SHA_224 1
-#define MBEDTLS_SHA256_C
+#define MBEDTLS_SHA224_C
 #endif
 
 #if defined(PSA_WANT_ALG_SHA_256) && !defined(MBEDTLS_PSA_ACCEL_ALG_SHA_256)
@@ -604,10 +604,13 @@ extern "C" {
 #define PSA_WANT_ALG_SHA_1 1
 #endif
 
-#if defined(MBEDTLS_SHA256_C)
+#if defined(MBEDTLS_SHA224_C)
 #define MBEDTLS_PSA_BUILTIN_ALG_SHA_224 1
-#define MBEDTLS_PSA_BUILTIN_ALG_SHA_256 1
 #define PSA_WANT_ALG_SHA_224 1
+#endif
+
+#if defined(MBEDTLS_SHA256_C)
+#define MBEDTLS_PSA_BUILTIN_ALG_SHA_256 1
 #define PSA_WANT_ALG_SHA_256 1
 #endif
 

include/mbedtls/psa_util.h

@@ -136,9 +136,11 @@ static inline psa_algorithm_t mbedtls_psa_translate_md( mbedtls_md_type_t md_alg
     case MBEDTLS_MD_SHA1:
         return( PSA_ALG_SHA_1 );
 #endif
-#if defined(MBEDTLS_SHA256_C)
+#if defined(MBEDTLS_SHA224_C)
     case MBEDTLS_MD_SHA224:
         return( PSA_ALG_SHA_224 );
+#endif
+#if defined(MBEDTLS_SHA256_C)
     case MBEDTLS_MD_SHA256:
         return( PSA_ALG_SHA_256 );
 #endif