Add a return value to prf_t.allocate_bytes()

src/libcharon/sa/ikev1/keymat_v1.c

@@ -435,7 +435,11 @@ METHOD(keymat_v1_t, derive_ike_keys, bool,
 			psk = shared_key->get_key(shared_key);
 			adjust_keylen(alg, &psk);
 			this->prf->set_key(this->prf, psk);
-			this->prf->allocate_bytes(this->prf, nonces, &skeyid);
+			if (!this->prf->allocate_bytes(this->prf, nonces, &skeyid))
+			{
+				chunk_clear(&g_xy);
+				return FALSE;
+			}
 			break;
 		}
 		case AUTH_RSA:
@@ -448,7 +452,11 @@ METHOD(keymat_v1_t, derive_ike_keys, bool,
 		case AUTH_HYBRID_RESP_RSA:
 		{
 			this->prf->set_key(this->prf, nonces);
-			this->prf->allocate_bytes(this->prf, g_xy, &skeyid);
+			if (!this->prf->allocate_bytes(this->prf, g_xy, &skeyid))
+			{
+				chunk_clear(&g_xy);
+				return FALSE;
+			}
 			break;
 		}
 		default:
@@ -463,19 +471,31 @@ METHOD(keymat_v1_t, derive_ike_keys, bool,
 
 	/* SKEYID_d = prf(SKEYID, g^xy | CKY-I | CKY-R | 0) */
 	data = chunk_cat("cccc", g_xy, spi_i, spi_r, octet_0);
-	this->prf->allocate_bytes(this->prf, data, &this->skeyid_d);
+	if (!this->prf->allocate_bytes(this->prf, data, &this->skeyid_d))
+	{
+		chunk_clear(&g_xy);
+		chunk_clear(&data);
+	}
 	chunk_clear(&data);
 	DBG4(DBG_IKE, "SKEYID_d %B", &this->skeyid_d);
 
 	/* SKEYID_a = prf(SKEYID, SKEYID_d | g^xy | CKY-I | CKY-R | 1) */
 	data = chunk_cat("ccccc", this->skeyid_d, g_xy, spi_i, spi_r, octet_1);
-	this->prf->allocate_bytes(this->prf, data, &this->skeyid_a);
+	if (!this->prf->allocate_bytes(this->prf, data, &this->skeyid_a))
+	{
+		chunk_clear(&g_xy);
+		chunk_clear(&data);
+	}
 	chunk_clear(&data);
 	DBG4(DBG_IKE, "SKEYID_a %B", &this->skeyid_a);
 
 	/* SKEYID_e = prf(SKEYID, SKEYID_a | g^xy | CKY-I | CKY-R | 2) */
 	data = chunk_cat("ccccc", this->skeyid_a, g_xy, spi_i, spi_r, octet_2);
-	this->prf->allocate_bytes(this->prf, data, &skeyid_e);
+	if (!this->prf->allocate_bytes(this->prf, data, &skeyid_e))
+	{
+		chunk_clear(&g_xy);
+		chunk_clear(&data);
+	}
 	chunk_clear(&data);
 	DBG4(DBG_IKE, "SKEYID_e %B", &skeyid_e);
 
@@ -724,7 +744,11 @@ METHOD(keymat_v1_t, get_hash, bool,
 
 	DBG3(DBG_IKE, "HASH_%c data %B", initiator ? 'I' : 'R', &data);
 
-	this->prf_auth->allocate_bytes(this->prf_auth, data, hash);
+	if (!this->prf_auth->allocate_bytes(this->prf_auth, data, hash))
+	{
+		free(data.ptr);
+		return FALSE;
+	}
 
 	DBG3(DBG_IKE, "HASH_%c %B", initiator ? 'I' : 'R', hash);
 
@@ -897,15 +921,25 @@ METHOD(keymat_v1_t, get_hash_phase2, bool,
 	this->prf->set_key(this->prf, this->skeyid_a);
 	if (add_message)
 	{
-		generator_t *generator = generator_create_no_dbg();
+		generator_t *generator;
-		chunk_t msg = get_message_data(message, generator);
+		chunk_t msg;
-		this->prf->allocate_bytes(this->prf, data, NULL);
+
-		this->prf->allocate_bytes(this->prf, msg, hash);
+		generator = generator_create_no_dbg();
+		msg = get_message_data(message, generator);
+		if (!this->prf->allocate_bytes(this->prf, data, NULL) ||
+			!this->prf->allocate_bytes(this->prf, msg, hash))
+		{
+			generator->destroy(generator);
+			return FALSE;
+		}
 		generator->destroy(generator);
 	}
 	else
 	{
-		this->prf->allocate_bytes(this->prf, data, hash);
+		if (!this->prf->allocate_bytes(this->prf, data, hash))
+		{
+			return FALSE;
+		}
 	}
 	DBG3(DBG_IKE, "%s %B", name, hash);
 	return TRUE;

src/libcharon/sa/ikev2/keymat_v2.c

@@ -260,7 +260,7 @@ METHOD(keymat_v2_t, derive_ike_keys, bool,
 {
 	chunk_t skeyseed, key, secret, full_nonce, fixed_nonce, prf_plus_seed;
 	chunk_t spi_i, spi_r;
-	prf_plus_t *prf_plus;
+	prf_plus_t *prf_plus = NULL;
 	u_int16_t alg, key_size, int_alg;
 	prf_t *rekey_prf = NULL;
 
@@ -323,9 +323,11 @@ METHOD(keymat_v2_t, derive_ike_keys, bool,
 	{
 		/* SKEYSEED = prf(Ni | Nr, g^ir) */
 		this->prf->set_key(this->prf, fixed_nonce);
-		this->prf->allocate_bytes(this->prf, secret, &skeyseed);
+		if (this->prf->allocate_bytes(this->prf, secret, &skeyseed))
-		this->prf->set_key(this->prf, skeyseed);
+		{
-		prf_plus = prf_plus_create(this->prf, TRUE, prf_plus_seed);
+			this->prf->set_key(this->prf, skeyseed);
+			prf_plus = prf_plus_create(this->prf, TRUE, prf_plus_seed);
+		}
 	}
 	else
 	{
@@ -343,9 +345,11 @@ METHOD(keymat_v2_t, derive_ike_keys, bool,
 		}
 		secret = chunk_cat("mc", secret, full_nonce);
 		rekey_prf->set_key(rekey_prf, rekey_skd);
-		rekey_prf->allocate_bytes(rekey_prf, secret, &skeyseed);
+		if (rekey_prf->allocate_bytes(rekey_prf, secret, &skeyseed))
-		rekey_prf->set_key(rekey_prf, skeyseed);
+		{
-		prf_plus = prf_plus_create(rekey_prf, TRUE, prf_plus_seed);
+			rekey_prf->set_key(rekey_prf, skeyseed);
+			prf_plus = prf_plus_create(rekey_prf, TRUE, prf_plus_seed);
+		}
 	}
 	DBG4(DBG_IKE, "SKEYSEED %B", &skeyseed);
 
@@ -593,8 +597,10 @@ METHOD(keymat_v2_t, get_auth_octets, bool,
 	DBG3(DBG_IKE, "IDx' %B", &idx);
 	DBG3(DBG_IKE, "SK_p %B", &skp);
 	this->prf->set_key(this->prf, skp);
-	this->prf->allocate_bytes(this->prf, idx, &chunk);
+	if (!this->prf->allocate_bytes(this->prf, idx, &chunk))
-
+	{
+		return FALSE;
+	}
 	*octets = chunk_cat("ccm", ike_sa_init, nonce, chunk);
 	DBG3(DBG_IKE, "octets = message + nonce + prf(Sk_px, IDx') %B", octets);
 	return TRUE;
@@ -623,9 +629,18 @@ METHOD(keymat_v2_t, get_psk_sig, bool,
 	/* AUTH = prf(prf(Shared Secret,"Key Pad for IKEv2"), <msg octets>) */
 	key_pad = chunk_create(IKEV2_KEY_PAD, IKEV2_KEY_PAD_LENGTH);
 	this->prf->set_key(this->prf, secret);
-	this->prf->allocate_bytes(this->prf, key_pad, &key);
+	if (!this->prf->allocate_bytes(this->prf, key_pad, &key))
+	{
+		chunk_free(&octets);
+		return FALSE;
+	}
 	this->prf->set_key(this->prf, key);
-	this->prf->allocate_bytes(this->prf, octets, sig);
+	if (!this->prf->allocate_bytes(this->prf, octets, sig))
+	{
+		chunk_free(&key);
+		chunk_free(&octets);
+		return FALSE;
+	}
 	DBG4(DBG_IKE, "secret %B", &secret);
 	DBG4(DBG_IKE, "prf(secret, keypad) %B", &key);
 	DBG3(DBG_IKE, "AUTH = prf(prf(secret, keypad), octets) %B", sig);

src/libstrongswan/crypto/crypto_tester.c

@@ -847,7 +847,10 @@ METHOD(crypto_tester_t, test_prf, bool,
 
 		/* allocated bytes */
 		seed = chunk_create(vector->seed, vector->len);
-		prf->allocate_bytes(prf, seed, &out);
+		if (!prf->allocate_bytes(prf, seed, &out))
+		{
+			failed = TRUE;
+		}
 		if (out.len != prf->get_block_size(prf))
 		{
 			failed = TRUE;
@@ -878,8 +881,8 @@ METHOD(crypto_tester_t, test_prf, bool,
 			{
 				prf->set_key(prf, key);
 			}
-			prf->allocate_bytes(prf, chunk_create(seed.ptr, 1), NULL);
+			if (!prf->allocate_bytes(prf, chunk_create(seed.ptr, 1), NULL) ||
-			if (!prf->get_bytes(prf, chunk_create(seed.ptr + 1, 1), NULL) ||
+				!prf->get_bytes(prf, chunk_create(seed.ptr + 1, 1), NULL) ||
 				!prf->get_bytes(prf, chunk_skip(seed, 2), out.ptr))
 			{
 				failed = TRUE;

src/libstrongswan/crypto/prfs/mac_prf.c

@@ -42,7 +42,7 @@ METHOD(prf_t, get_bytes, bool,
 	return TRUE;
 }
 
-METHOD(prf_t, allocate_bytes, void,
+METHOD(prf_t, allocate_bytes, bool,
 	private_prf_t *this, chunk_t seed, chunk_t *chunk)
 {
 	if (!chunk)
@@ -54,6 +54,7 @@ METHOD(prf_t, allocate_bytes, void,
 		*chunk = chunk_alloc(this->mac->get_mac_size(this->mac));
 		this->mac->get_mac(this->mac, seed, chunk->ptr);
 	}
+	return TRUE;
 }
 
 METHOD(prf_t, get_block_size, size_t,

src/libstrongswan/crypto/prfs/prf.h

@@ -87,8 +87,10 @@ struct prf_t {
 	 *
 	 * @param seed		a chunk containing the seed for the next bytes
 	 * @param chunk		chunk which will hold generated bytes
+	 * @return			TRUE if bytes allocated and generated successfully
 	 */
-	void (*allocate_bytes) (prf_t *this, chunk_t seed, chunk_t *chunk);
+	__attribute__((warn_unused_result))
+	bool (*allocate_bytes) (prf_t *this, chunk_t seed, chunk_t *chunk);
 
 	/**
 	 * Get the block size of this prf_t object.

src/libstrongswan/plugins/af_alg/af_alg_prf.c

@@ -112,18 +112,15 @@ METHOD(prf_t, get_bytes, bool,
 	return TRUE;
 }
 
-METHOD(prf_t, allocate_bytes, void,
+METHOD(prf_t, allocate_bytes, bool,
 	private_af_alg_prf_t *this, chunk_t seed, chunk_t *chunk)
 {
 	if (chunk)
 	{
 		*chunk = chunk_alloc(this->block_size);
-		get_bytes(this, seed, chunk->ptr);
+		return get_bytes(this, seed, chunk->ptr);
-	}
-	else
-	{
-		get_bytes(this, seed, NULL);
 	}
+	return get_bytes(this, seed, NULL);
 }
 
 METHOD(prf_t, get_block_size, size_t,

src/libstrongswan/plugins/fips_prf/fips_prf.c

@@ -147,11 +147,11 @@ METHOD(prf_t, get_block_size, size_t,
 {
 	return 2 * this->b;
 }
-METHOD(prf_t, allocate_bytes, void,
+METHOD(prf_t, allocate_bytes, bool,
 	private_fips_prf_t *this, chunk_t seed, chunk_t *chunk)
 {
 	*chunk = chunk_alloc(get_block_size(this));
-	get_bytes(this, seed, chunk->ptr);
+	return get_bytes(this, seed, chunk->ptr);
 }
 
 METHOD(prf_t, get_key_size, size_t,

src/libstrongswan/plugins/openssl/openssl_sha1_prf.c

@@ -60,18 +60,15 @@ METHOD(prf_t, get_block_size, size_t,
 	return HASH_SIZE_SHA1;
 }
 
-METHOD(prf_t, allocate_bytes, void,
+METHOD(prf_t, allocate_bytes, bool,
 	private_openssl_sha1_prf_t *this, chunk_t seed, chunk_t *chunk)
 {
 	if (chunk)
 	{
 		*chunk = chunk_alloc(HASH_SIZE_SHA1);
-		get_bytes(this, seed, chunk->ptr);
+		return get_bytes(this, seed, chunk->ptr);
-	}
-	else
-	{
-		get_bytes(this, seed, NULL);
 	}
+	return get_bytes(this, seed, NULL);
 }
 
 METHOD(prf_t, get_key_size, size_t,

src/libstrongswan/plugins/sha1/sha1_prf.c

@@ -81,11 +81,11 @@ METHOD(prf_t, get_block_size, size_t,
 	return HASH_SIZE_SHA1;
 }
 
-METHOD(prf_t, allocate_bytes, void,
+METHOD(prf_t, allocate_bytes, bool,
 	private_sha1_prf_t *this, chunk_t seed, chunk_t *chunk)
 {
 	*chunk = chunk_alloc(HASH_SIZE_SHA1);
-	get_bytes(this, seed, chunk->ptr);
+	return get_bytes(this, seed, chunk->ptr);
 }
 
 METHOD(prf_t, get_key_size, size_t,