bootutil/crypto: SHA256 abort function return state

Similarly to what has been done for the init function, also
the abort function should return a state in case the caller
needs to implement some error recovery procedure, or even
just for debugging reasons.

Signed-off-by: Antonio de Angelis <Antonio.deAngelis@arm.com>
Change-Id: I5b8bc8fc2da57cfbc6ddea3f7e95ed7a7ae8e5a9

boot/bootutil/include/bootutil/crypto/sha256.h

@@ -77,9 +77,9 @@ static inline int bootutil_sha256_init(bootutil_sha256_context *ctx)
     return (int)psa_hash_setup(ctx, PSA_ALG_SHA_256);
 }
 
-static inline void bootutil_sha256_drop(bootutil_sha256_context *ctx)
+static inline int bootutil_sha256_drop(bootutil_sha256_context *ctx)
 {
-    (void)psa_hash_abort(ctx);
+    return (int)psa_hash_abort(ctx);
 }
 
 static inline int bootutil_sha256_update(bootutil_sha256_context *ctx,
@@ -107,11 +107,12 @@ static inline int bootutil_sha256_init(bootutil_sha256_context *ctx)
     return mbedtls_sha256_starts_ret(ctx, 0);
 }
 
-static inline void bootutil_sha256_drop(bootutil_sha256_context *ctx)
+static inline int bootutil_sha256_drop(bootutil_sha256_context *ctx)
 {
     /* XXX: config defines MBEDTLS_PLATFORM_NO_STD_FUNCTIONS so no need to free */
     /* (void)mbedtls_sha256_free(ctx); */
     (void)ctx;
+    return 0;
 }
 
 static inline int bootutil_sha256_update(bootutil_sha256_context *ctx,
@@ -137,9 +138,10 @@ static inline int bootutil_sha256_init(bootutil_sha256_context *ctx)
     return 0;
 }
 
-static inline void bootutil_sha256_drop(bootutil_sha256_context *ctx)
+static inline int bootutil_sha256_drop(bootutil_sha256_context *ctx)
 {
     (void)ctx;
+    return 0;
 }
 
 static inline int bootutil_sha256_update(bootutil_sha256_context *ctx,
@@ -163,10 +165,11 @@ static inline int bootutil_sha256_init(bootutil_sha256_context *ctx)
     return 0;
 }
 
-static inline void bootutil_sha256_drop(bootutil_sha256_context *ctx)
+static inline int bootutil_sha256_drop(bootutil_sha256_context *ctx)
 {
     (void)ctx;
     nrf_cc310_disable();
+    return 0;
 }
 
 static inline int bootutil_sha256_update(bootutil_sha256_context *ctx,