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authorJoe Richey joerichey@google.com <joerichey@google.com>2017-05-31 12:49:06 -0700
committerJoe Richey joerichey@google.com <joerichey@google.com>2017-06-15 22:31:35 -0700
commitd4160e07cfc1942844160fdb8e6c9525da0bd2c8 (patch)
treef2efd248231d6735f3c6ac854a0ac3e2546faabe /pam/pam.h
parent5730f061642c1b3065eabd55f8748a3cd43f65b4 (diff)
pam: checking a user's login passphrase
This commit adds in the fscrypt/pam package. This package will hold all functionality related to Linux Pluggable Authentication Modules (PAM). Right now this package uses cgo to mock a PAM conversation, allowing the function to check if a provided passphrase actually belongs to a user. Due to the nature of cgo callbacks, global state of the key to check is necessary for this function. This commit also addresses some issues about building the cgo components. Now, only the minimal linking flags are included in the go files. Additional linker flags may now be necessary to build a static binary of fscrypt. This is addressed in the Makefile and README. Finally, this commit fixes a bug where the tests would not run correctly due to shared global state on the testing filesystem. Fixed, by having all the tests run sequentially. Change-Id: Ia43636801da984b505d2f43dd14127b7cfbf2c48
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+/*
+ * pam.h - Functions to let us call into libpam from Go.
+ *
+ * Copyright 2017 Google Inc.
+ * Author: Joe Richey (joerichey@google.com)
+ *
+ * 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.
+ */
+
+#ifndef FSCRYPT_PAM_H
+#define FSCRYPT_PAM_H
+
+#include <security/pam_appl.h>
+
+// fscrypt_service is the display name of the service requesting the passphrase.
+const char* fscrypt_service;
+
+// pam_init initializes the pam_conv structure for use with our Go callbacks.
+void pam_init(struct pam_conv* conv);
+
+#endif