Add a return value to signer_t.set_key()

src/libstrongswan/crypto/aead.c

@@ -138,7 +138,10 @@ METHOD(aead_t, set_key, bool,
 	chunk_split(key, "mm", this->signer->get_key_size(this->signer), &sig,
 				this->crypter->get_key_size(this->crypter), &enc);
 
-	this->signer->set_key(this->signer, sig);
+	if (!this->signer->set_key(this->signer, sig))
+	{
+		return FALSE;
+	}
 	this->crypter->set_key(this->crypter, enc);
 
 	return TRUE;

src/libstrongswan/crypto/crypto_tester.c

@@ -488,7 +488,10 @@ static u_int bench_signer(private_crypto_tester_t *this,
 		u_int runs;
 
 		memset(key, 0x12, sizeof(key));
-		signer->set_key(signer, chunk_from_thing(key));
+		if (!signer->set_key(signer, chunk_from_thing(key)))
+		{
+			return 0;
+		}
 
 		buf = chunk_alloc(this->bench_size);
 		memset(buf.ptr, 0x34, buf.len);
@@ -547,8 +550,10 @@ METHOD(crypto_tester_t, test_signer, bool,
 		failed = FALSE;
 
 		key = chunk_create(vector->key, signer->get_key_size(signer));
-		signer->set_key(signer, key);
-
+		if (!signer->set_key(signer, key))
+		{
+			failed = TRUE;
+		}
 		/* allocated signature */
 		data = chunk_create(vector->data, vector->len);
 		if (!signer->allocate_signature(signer, data, &mac))

src/libstrongswan/crypto/signers/mac_signer.c

@@ -101,10 +101,11 @@ METHOD(signer_t, get_block_size, size_t,
 	return this->truncation;
 }
 
-METHOD(signer_t, set_key, void,
+METHOD(signer_t, set_key, bool,
 	private_signer_t *this, chunk_t key)
 {
 	this->mac->set_key(this->mac, key);
+	return TRUE;
 }
 
 METHOD(signer_t, destroy, void,

src/libstrongswan/crypto/signers/signer.h

@@ -140,8 +140,10 @@ struct signer_t {
 	 * Set the key for this object.
 	 *
 	 * @param key		key to set
+	 * @return			TRUE if key set
 	 */
-	void (*set_key) (signer_t *this, chunk_t key);
+	__attribute__((warn_unused_result))
+	bool (*set_key) (signer_t *this, chunk_t key);
 
 	/**
 	 * Destroys a signer_t object.

src/libstrongswan/plugins/af_alg/af_alg_signer.c

@@ -153,10 +153,11 @@ METHOD(signer_t, get_block_size, size_t,
 	return this->block_size;
 }
 
-METHOD(signer_t, set_key, void,
+METHOD(signer_t, set_key, bool,
 	private_af_alg_signer_t *this, chunk_t key)
 {
 	this->ops->set_key(this->ops, key);
+	return TRUE;
 }
 
 METHOD(signer_t, destroy, void,