sha3 functions can now return an error (likely to be ignored) if output length is to large. Also add shake###_output

src/GENERATED/include/decaf/shake.h

@@ -136,7 +136,7 @@ void decaf_sponge_destroy (
  * @param [in] outlen The length of the output data.
  * @param [in] params The parameters of the sponge hash.
  */  
-void decaf_sponge_hash (
+decaf_error_t decaf_sponge_hash (
     const uint8_t *in,
     size_t inlen,
     uint8_t *out,
@@ -163,6 +163,9 @@ void decaf_sponge_hash (
         decaf_sha3_output(sponge->s, out, outlen); \
         decaf_sponge_init(sponge->s, &DECAF_SHAKE##n##_params_s); \
     } \
+    static inline void  DECAF_NONNULL decaf_shake##n##_output(decaf_shake##n##_ctx_t sponge, uint8_t *out, size_t outlen ) { \
+        decaf_sha3_output(sponge->s, out, outlen); \
+    } \
     static inline void  DECAF_NONNULL decaf_shake##n##_hash(uint8_t *out, size_t outlen, const uint8_t *in, size_t inlen) { \
         decaf_sponge_hash(in,inlen,out,outlen,&DECAF_SHAKE##n##_params_s); \
     } \
@@ -182,12 +185,16 @@ void decaf_sponge_hash (
     static inline void DECAF_NONNULL decaf_sha3_##n##_update(decaf_sha3_##n##_ctx_t sponge, const uint8_t *in, size_t inlen ) { \
         decaf_sha3_update(sponge->s, in, inlen); \
     } \
-    static inline void DECAF_NONNULL decaf_sha3_##n##_final(decaf_sha3_##n##_ctx_t sponge, uint8_t *out, size_t outlen ) { \
-        decaf_sha3_output(sponge->s, out, outlen); \
+    static inline decaf_error_t DECAF_NONNULL decaf_sha3_##n##_final(decaf_sha3_##n##_ctx_t sponge, uint8_t *out, size_t outlen ) { \
+        decaf_error_t ret = decaf_sha3_output(sponge->s, out, outlen); \
         decaf_sponge_init(sponge->s, &DECAF_SHA3_##n##_params_s); \
+        return ret; \
+    } \
+    static inline decaf_error_t DECAF_NONNULL decaf_sha3_##n##_output(decaf_sha3_##n##_ctx_t sponge, uint8_t *out, size_t outlen ) { \
+        return decaf_sha3_output(sponge->s, out, outlen); \
     } \
-    static inline void DECAF_NONNULL decaf_sha3_##n##_hash(uint8_t *out, size_t outlen, const uint8_t *in, size_t inlen) { \
-        decaf_sponge_hash(in,inlen,out,outlen,&DECAF_SHA3_##n##_params_s); \
+    static inline decaf_error_t DECAF_NONNULL decaf_sha3_##n##_hash(uint8_t *out, size_t outlen, const uint8_t *in, size_t inlen) { \
+        return decaf_sponge_hash(in,inlen,out,outlen,&DECAF_SHA3_##n##_params_s); \
     } \
     static inline void DECAF_NONNULL decaf_sha3_##n##_destroy(decaf_sha3_##n##_ctx_t sponge) { \
         decaf_sponge_destroy(sponge->s); \

src/public_include/decaf/shake.h

@@ -136,7 +136,7 @@ void decaf_sponge_destroy (
  * @param [in] outlen The length of the output data.
  * @param [in] params The parameters of the sponge hash.
  */  
-void decaf_sponge_hash (
+decaf_error_t decaf_sponge_hash (
     const uint8_t *in,
     size_t inlen,
     uint8_t *out,
@@ -163,6 +163,9 @@ void decaf_sponge_hash (
         decaf_sha3_output(sponge->s, out, outlen); \
         decaf_sponge_init(sponge->s, &DECAF_SHAKE##n##_params_s); \
     } \
+    static inline void  DECAF_NONNULL decaf_shake##n##_output(decaf_shake##n##_ctx_t sponge, uint8_t *out, size_t outlen ) { \
+        decaf_sha3_output(sponge->s, out, outlen); \
+    } \
     static inline void  DECAF_NONNULL decaf_shake##n##_hash(uint8_t *out, size_t outlen, const uint8_t *in, size_t inlen) { \
         decaf_sponge_hash(in,inlen,out,outlen,&DECAF_SHAKE##n##_params_s); \
     } \
@@ -182,12 +185,16 @@ void decaf_sponge_hash (
     static inline void DECAF_NONNULL decaf_sha3_##n##_update(decaf_sha3_##n##_ctx_t sponge, const uint8_t *in, size_t inlen ) { \
         decaf_sha3_update(sponge->s, in, inlen); \
     } \
-    static inline void DECAF_NONNULL decaf_sha3_##n##_final(decaf_sha3_##n##_ctx_t sponge, uint8_t *out, size_t outlen ) { \
-        decaf_sha3_output(sponge->s, out, outlen); \
+    static inline decaf_error_t DECAF_NONNULL decaf_sha3_##n##_final(decaf_sha3_##n##_ctx_t sponge, uint8_t *out, size_t outlen ) { \
+        decaf_error_t ret = decaf_sha3_output(sponge->s, out, outlen); \
         decaf_sponge_init(sponge->s, &DECAF_SHA3_##n##_params_s); \
+        return ret; \
+    } \
+    static inline decaf_error_t DECAF_NONNULL decaf_sha3_##n##_output(decaf_sha3_##n##_ctx_t sponge, uint8_t *out, size_t outlen ) { \
+        return decaf_sha3_output(sponge->s, out, outlen); \
     } \
-    static inline void DECAF_NONNULL decaf_sha3_##n##_hash(uint8_t *out, size_t outlen, const uint8_t *in, size_t inlen) { \
-        decaf_sponge_hash(in,inlen,out,outlen,&DECAF_SHA3_##n##_params_s); \
+    static inline decaf_error_t DECAF_NONNULL decaf_sha3_##n##_hash(uint8_t *out, size_t outlen, const uint8_t *in, size_t inlen) { \
+        return decaf_sponge_hash(in,inlen,out,outlen,&DECAF_SHA3_##n##_params_s); \
     } \
     static inline void DECAF_NONNULL decaf_sha3_##n##_destroy(decaf_sha3_##n##_ctx_t sponge) { \
         decaf_sponge_destroy(sponge->s); \

src/shake.c

@@ -187,7 +187,7 @@ void decaf_sponge_init (
     decaf_sponge->params->position = 0;
 }
 
-void decaf_sponge_hash (
+decaf_error_t decaf_sponge_hash (
     const uint8_t *in,
     size_t inlen,
     uint8_t *out,
@@ -197,8 +197,9 @@ void decaf_sponge_hash (
     decaf_keccak_sponge_t decaf_sponge;
     decaf_sponge_init(decaf_sponge, params);
     decaf_sha3_update(decaf_sponge, in, inlen);
-    decaf_sha3_output(decaf_sponge, out, outlen);
+    decaf_error_t ret = decaf_sha3_output(decaf_sponge, out, outlen);
     decaf_sponge_destroy(decaf_sponge);
+    return ret;
 }
 
 #define DEFSHAKE(n) \