1/*
2 * Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26#include <jni.h>
27#include "com_sun_security_auth_module_SolarisSystem.h"
28#include <stdio.h>
29#include <unistd.h>
30#include <stdlib.h>
31#include <string.h>
32
33/* For POSIX-compliant getpwuid_r on Solaris */
34#if defined(__solaris__)
35#define _POSIX_PTHREAD_SEMANTICS
36#endif
37#include <pwd.h>
38
39static void throwIllegalArgumentException(JNIEnv *env, const char *msg) {
40    jclass clazz = (*env)->FindClass(env, "java/lang/IllegalArgumentException");
41    if (clazz != NULL)
42        (*env)->ThrowNew(env, clazz, msg);
43}
44
45JNIEXPORT void JNICALL
46Java_com_sun_security_auth_module_SolarisSystem_getSolarisInfo
47                                                (JNIEnv *env, jobject obj) {
48
49    int i;
50    long pwd_bufsize;
51    char *pwd_buf = NULL;
52    struct passwd pwd;
53    struct passwd* p = NULL;
54    jsize numSuppGroups = getgroups(0, NULL);
55    jfieldID fid;
56    jstring jstr;
57    jlongArray jgroups;
58    jlong *jgroupsAsArray;
59    gid_t *groups;
60    jclass cls;
61
62    pwd_bufsize = sysconf(_SC_GETPW_R_SIZE_MAX);
63    if (pwd_bufsize == -1) {
64        pwd_bufsize = 1024;
65    }
66    pwd_buf = (char *)malloc(pwd_bufsize);
67    groups = (gid_t *)calloc(numSuppGroups, sizeof(gid_t));
68
69    if (pwd_buf == NULL || groups == NULL) {
70        if (pwd_buf != NULL) {
71            free(pwd_buf);
72        }
73        if (groups != NULL) {
74            free(groups);
75        }
76        cls = (*env)->FindClass(env,"java/lang/OutOfMemoryError");
77        if (cls != NULL) {
78            (*env)->ThrowNew(env, cls, NULL);
79        }
80        return;
81    }
82
83    cls = (*env)->GetObjectClass(env, obj);
84
85    if (getpwuid_r(getuid(), &pwd, pwd_buf, sizeof(pwd_buf), &p) != 0 &&
86        p != NULL && getgroups(numSuppGroups, groups) != -1) {
87
88        /*
89         * set username
90         */
91        fid = (*env)->GetFieldID(env, cls, "username", "Ljava/lang/String;");
92        if (fid == 0) {
93            (*env)->ExceptionClear(env);
94            throwIllegalArgumentException(env, "invalid field: username");
95            goto cleanupAndReturn;
96        }
97        jstr = (*env)->NewStringUTF(env, pwd.pw_name);
98        if (jstr == NULL) {
99            goto cleanupAndReturn;
100        }
101        (*env)->SetObjectField(env, obj, fid, jstr);
102
103        /*
104         * set uid
105         */
106        fid = (*env)->GetFieldID(env, cls, "uid", "J");
107        if (fid == 0) {
108            (*env)->ExceptionClear(env);
109            throwIllegalArgumentException(env, "invalid field: uid");
110            goto cleanupAndReturn;
111        }
112        (*env)->SetLongField(env, obj, fid, pwd.pw_uid);
113
114        /*
115         * set gid
116         */
117        fid = (*env)->GetFieldID(env, cls, "gid", "J");
118        if (fid == 0) {
119            (*env)->ExceptionClear(env);
120            throwIllegalArgumentException(env, "invalid field: gid");
121            goto cleanupAndReturn;
122        }
123        (*env)->SetLongField(env, obj, fid, pwd.pw_gid);
124
125        /*
126         * set supplementary groups
127         */
128        fid = (*env)->GetFieldID(env, cls, "groups", "[J");
129        if (fid == 0) {
130            (*env)->ExceptionClear(env);
131            throwIllegalArgumentException(env, "invalid field: groups");
132            goto cleanupAndReturn;
133        }
134
135        jgroups = (*env)->NewLongArray(env, numSuppGroups);
136        if (jgroups == NULL) {
137            goto cleanupAndReturn;
138        }
139        jgroupsAsArray = (*env)->GetLongArrayElements(env, jgroups, 0);
140        if (jgroupsAsArray == NULL) {
141            goto cleanupAndReturn;
142        }
143        for (i = 0; i < numSuppGroups; i++)
144            jgroupsAsArray[i] = groups[i];
145        (*env)->ReleaseLongArrayElements(env, jgroups, jgroupsAsArray, 0);
146        (*env)->SetObjectField(env, obj, fid, jgroups);
147    }
148cleanupAndReturn:
149    free(pwd_buf);
150    free(groups);
151    return;
152}
153