1 /* 2 * Copyright (c) 2000, 2018, 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 "jni_util.h" 28 #include "com_sun_security_auth_module_UnixSystem.h" 29 #include <stdio.h> 30 #include <sys/types.h> 31 #include <unistd.h> 32 #include <stdlib.h> 33 #include <string.h> 34 35 #include <pwd.h> 36 37 /* 38 * Declare library specific JNI_Onload entry if static build 39 */ 40 DEF_STATIC_JNI_OnLoad 41 42 JNIEXPORT void JNICALL 43 Java_com_sun_security_auth_module_UnixSystem_getUnixInfo 44 (JNIEnv *env, jobject obj) { 45 46 int i; 47 char pwd_buf[1024]; 48 struct passwd *pwd; 49 struct passwd resbuf; 50 jfieldID userNameID; 51 jfieldID userID; 52 jfieldID groupID; 53 jfieldID supplementaryGroupID; 54 55 jstring jstr; 56 jlongArray jgroups; 57 jlong *jgroupsAsArray; 58 jsize numSuppGroups; 59 gid_t *groups; 60 jclass cls; 61 62 numSuppGroups = getgroups(0, NULL); 63 if (numSuppGroups == -1) { 64 return; 65 } 66 groups = (gid_t *)calloc(numSuppGroups, sizeof(gid_t)); 67 if (groups == NULL) { 68 jclass cls = (*env)->FindClass(env,"java/lang/OutOfMemoryError"); 69 if (cls != NULL) 70 (*env)->ThrowNew(env, cls, NULL); 71 return; 72 } 73 74 cls = (*env)->GetObjectClass(env, obj); 75 76 memset(pwd_buf, 0, sizeof(pwd_buf)); 77 78 if (getpwuid_r(getuid(), &resbuf, pwd_buf, sizeof(pwd_buf), &pwd) == 0 && 79 pwd != NULL && 80 getgroups(numSuppGroups, groups) != -1) { 81 82 userNameID = (*env)->GetFieldID(env, cls, "username", "Ljava/lang/String;"); 83 if (userNameID == 0) 84 goto cleanUpAndReturn; 85 86 userID = (*env)->GetFieldID(env, cls, "uid", "J"); 87 if (userID == 0) 88 goto cleanUpAndReturn; 89 90 groupID = (*env)->GetFieldID(env, cls, "gid", "J"); 91 if (groupID == 0) 92 goto cleanUpAndReturn; 93 94 supplementaryGroupID = (*env)->GetFieldID(env, cls, "groups", "[J"); 95 if (supplementaryGroupID == 0) 96 goto cleanUpAndReturn; 97 98 jstr = (*env)->NewStringUTF(env, pwd->pw_name); 99 if (jstr == NULL) 100 goto cleanUpAndReturn; 101 (*env)->SetObjectField(env, obj, userNameID, jstr); 102 103 (*env)->SetLongField(env, obj, userID, pwd->pw_uid); 104 105 (*env)->SetLongField(env, obj, groupID, pwd->pw_gid); 106 107 jgroups = (*env)->NewLongArray(env, numSuppGroups); 108 if (jgroups == NULL) 109 goto cleanUpAndReturn; 110 jgroupsAsArray = (*env)->GetLongArrayElements(env, jgroups, 0); 111 if (jgroupsAsArray == NULL) 112 goto cleanUpAndReturn; 113 for (i = 0; i < numSuppGroups; i++) 114 jgroupsAsArray[i] = groups[i]; 115 (*env)->ReleaseLongArrayElements(env, jgroups, jgroupsAsArray, 0); 116 (*env)->SetObjectField(env, obj, supplementaryGroupID, jgroups); 117 } 118 cleanUpAndReturn: 119 free(groups); 120 return; 121 }