diff options
| author |   Mauro Sardara <msardara+fdio@cisco.com> | 2018-12-18 11:05:49 +0000 |
|---|---|---|
| committer |   Gerrit Code Review <gerrit@fd.io> | 2018-12-18 11:05:49 +0000 |
| commit | cada1143501a48effc483e3873596c22849926b5 (patch) | |
| tree | 93a1da95d69b69328a1e7d3621447797f65137c9 /libparc/parc/security/parc_SecureRandom.c | |
| parent | 726949d76a7207694d5a1eee84ef134a8e539115 (diff) | |
| parent | a45edf23c2463ac9a4723a24792a6c5c89b1e021 (diff) | |
Merge "Adding gitreview config file for this branch sub project"
Diffstat (limited to 'libparc/parc/security/parc_SecureRandom.c')
| -rw-r--r-- | libparc/parc/security/parc_SecureRandom.c | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/libparc/parc/security/parc_SecureRandom.c b/libparc/parc/security/parc_SecureRandom.c new file mode 100644 index 00000000..8ebf7f0f --- /dev/null +++ b/libparc/parc/security/parc_SecureRandom.c @@ -0,0 +1,123 @@ +/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+/**
+ */
+#include <config.h>
+
+#include <stdlib.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#include <parc/algol/parc_Object.h>
+#include <parc/algol/parc_DisplayIndented.h>
+#include <parc/algol/parc_Memory.h>
+
+#include <parc/security/parc_SecureRandom.h>
+
+struct parc_securerandom {
+ int randomfd;
+};
+
+static bool
+_parcSecureRandom_Destructor(PARCSecureRandom **instancePtr)
+{
+ assertNotNull(instancePtr, "Parameter must be a non-null pointer to a PARCSecureRandom pointer.");
+ PARCSecureRandom *instance = *instancePtr;
+
+ close(instance->randomfd);
+
+ return true;
+}
+
+parcObject_ImplementAcquire(parcSecureRandom, PARCSecureRandom);
+parcObject_ImplementRelease(parcSecureRandom, PARCSecureRandom);
+parcObject_Override(PARCSecureRandom, PARCObject,
+ .destructor = (PARCObjectDestructor *) _parcSecureRandom_Destructor);
+
+void
+parcSecureRandom_AssertValid(const PARCSecureRandom *instance)
+{
+ assertTrue(parcSecureRandom_IsValid(instance),
+ "PARCSecureRandom is not valid.");
+}
+
+PARCSecureRandom *
+parcSecureRandom_Create()
+{
+ PARCSecureRandom *result = NULL;
+
+ int fd = open("/dev/urandom", O_RDWR);
+ if (fd != -1) {
+ result = parcObject_CreateInstance(PARCSecureRandom);
+ if (result != NULL) {
+ result->randomfd = fd;
+ } else {
+ close(fd);
+ }
+ }
+
+ return result;
+}
+
+static void
+_parcSecureRandom_ReSeed(PARCSecureRandom *random, PARCBuffer *buffer)
+{
+ size_t length = parcBuffer_Remaining(buffer);
+ write(random->randomfd, parcBuffer_Overlay(buffer, length), length);
+}
+
+PARCSecureRandom *
+parcSecureRandom_CreateWithSeed(PARCBuffer *seed)
+{
+ PARCSecureRandom *result = parcSecureRandom_Create();
+
+ if (result != NULL) {
+ _parcSecureRandom_ReSeed(result, seed);
+ }
+
+ return result;
+}
+
+uint32_t
+parcSecureRandom_Next(PARCSecureRandom *random)
+{
+ uint32_t value;
+ read(random->randomfd, &value, sizeof(value));
+ return value;
+}
+
+ssize_t
+parcSecureRandom_NextBytes(PARCSecureRandom *random, PARCBuffer *buffer)
+{
+ size_t length = parcBuffer_Remaining(buffer);
+ ssize_t result = read(random->randomfd, parcBuffer_Overlay(buffer, 0), length);
+ return result;
+}
+
+bool
+parcSecureRandom_IsValid(const PARCSecureRandom *instance)
+{
+ bool result = false;
+
+ if (instance != NULL) {
+ if (instance->randomfd != -1) {
+ result = true;
+ }
+ }
+
+ return result;
+}
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