Mercurial > dropbear

annotate auth.h @ 1060:4c733310c21d nocircbuffer

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reword comment for clarity
author Matt Johnston <matt@ucc.asn.au>
date Sun, 01 Mar 2015 23:26:42 +0800
parents deed0571cacc
children 2fa71c3b2827 c45d65392c1a
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1 /*
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2 * Dropbear - a SSH2 server
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3 *
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4 * Copyright (c) 2002,2003 Matt Johnston
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5 * All rights reserved.
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6 *
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7 * Permission is hereby granted, free of charge, to any person obtaining a copy
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8 * of this software and associated documentation files (the "Software"), to deal
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9 * in the Software without restriction, including without limitation the rights
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10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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11 * copies of the Software, and to permit persons to whom the Software is
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12 * furnished to do so, subject to the following conditions:
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13 *
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14 * The above copyright notice and this permission notice shall be included in
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15 * all copies or substantial portions of the Software.
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16 *
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17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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23 * SOFTWARE. */
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24
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25 #ifndef DROPBEAR_AUTH_H_
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26 #define DROPBEAR_AUTH_H_
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28 #include "includes.h"
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29 #include "signkey.h"
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30 #include "chansession.h"
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31
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32 void svr_authinitialise();
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33 void cli_authinitialise();
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34
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35 /* Server functions */
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36 void recv_msg_userauth_request();
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37 void send_msg_userauth_failure(int partial, int incrfail);
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38 void send_msg_userauth_success();
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39 void send_msg_userauth_banner(buffer *msg);
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40 void svr_auth_password();
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41 void svr_auth_pubkey();
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42 void svr_auth_pam();
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43
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44 #ifdef ENABLE_SVR_PUBKEY_OPTIONS
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45 int svr_pubkey_allows_agentfwd();
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46 int svr_pubkey_allows_tcpfwd();
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47 int svr_pubkey_allows_x11fwd();
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48 int svr_pubkey_allows_pty();
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49 void svr_pubkey_set_forced_command(struct ChanSess *chansess);
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50 void svr_pubkey_options_cleanup();
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51 int svr_add_pubkey_options(buffer *options_buf, int line_num, const char* filename);
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52 #else
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53 /* no option : success */
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54 #define svr_pubkey_allows_agentfwd() 1
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55 #define svr_pubkey_allows_tcpfwd() 1
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56 #define svr_pubkey_allows_x11fwd() 1
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57 #define svr_pubkey_allows_pty() 1
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58 static inline void svr_pubkey_set_forced_command(struct ChanSess *chansess) { }
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59 static inline void svr_pubkey_options_cleanup() { }
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60 #define svr_add_pubkey_options(x,y,z) DROPBEAR_SUCCESS
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61 #endif
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62
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63 /* Client functions */
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64 void recv_msg_userauth_failure();
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65 void recv_msg_userauth_success();
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66 void recv_msg_userauth_specific_60();
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67 void recv_msg_userauth_pk_ok();
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68 void recv_msg_userauth_info_request();
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69 void cli_get_user();
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70 void cli_auth_getmethods();
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71 int cli_auth_try();
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72 void recv_msg_userauth_banner();
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73 void cli_pubkeyfail();
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74 void cli_auth_password();
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75 int cli_auth_pubkey();
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76 void cli_auth_interactive();
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77 char* getpass_or_cancel(char* prompt);
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78 void cli_auth_pubkey_cleanup();
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79
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80
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81 #define MAX_USERNAME_LEN 25 /* arbitrary for the moment */
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83 #define AUTH_TYPE_NONE 1
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84 #define AUTH_TYPE_PUBKEY 1 << 1
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85 #define AUTH_TYPE_PASSWORD 1 << 2
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86 #define AUTH_TYPE_INTERACT 1 << 3
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87
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88 #define AUTH_METHOD_NONE "none"
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89 #define AUTH_METHOD_NONE_LEN 4
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90 #define AUTH_METHOD_PUBKEY "publickey"
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91 #define AUTH_METHOD_PUBKEY_LEN 9
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92 #define AUTH_METHOD_PASSWORD "password"
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93 #define AUTH_METHOD_PASSWORD_LEN 8
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94 #define AUTH_METHOD_INTERACT "keyboard-interactive"
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95 #define AUTH_METHOD_INTERACT_LEN 20
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96
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97
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99 /* This structure is shared between server and client - it contains
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100 * relatively little extraneous bits when used for the client rather than the
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101 * server */
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102 struct AuthState {
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103 char *username; /* This is the username the client presents to check. It
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104 is updated each run through, used for auth checking */
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105 unsigned char authtypes; /* Flags indicating which auth types are still
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106 valid */
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107 unsigned int failcount; /* Number of (failed) authentication attempts.*/
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108 unsigned authdone : 1; /* 0 if we haven't authed, 1 if we have. Applies for
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109 client and server (though has differing
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110 meanings). */
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111 unsigned perm_warn : 1; /* Server only, set if bad permissions on
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112 ~/.ssh/authorized_keys have already been
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113 logged. */
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114
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115 /* These are only used for the server */
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116 uid_t pw_uid;
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117 gid_t pw_gid;
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118 char *pw_dir;
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119 char *pw_shell;
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120 char *pw_name;
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121 char *pw_passwd;
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122 #ifdef ENABLE_SVR_PUBKEY_OPTIONS
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123 struct PubKeyOptions* pubkey_options;
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124 #endif
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125 };
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126
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127 #ifdef ENABLE_SVR_PUBKEY_OPTIONS
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128 struct PubKeyOptions;
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129 struct PubKeyOptions {
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130 /* Flags */
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131 int no_port_forwarding_flag;
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132 int no_agent_forwarding_flag;
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133 int no_x11_forwarding_flag;
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134 int no_pty_flag;
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135 /* "command=" option. */
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136 unsigned char * forced_command;
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137 };
52a644e7b8e1 * Patch from Frédéric Moulins adding options to authorized_keys.
Matt Johnston <matt@ucc.asn.au>
parents: 464
diff changeset
138 #endif
52a644e7b8e1 * Patch from Frédéric Moulins adding options to authorized_keys.
Matt Johnston <matt@ucc.asn.au>
parents: 464
diff changeset
139
1036
deed0571cacc DROPBEAR_ prefix for include guards to avoid collisions
Thorsten Horstmann <thorsten.horstmann@web.de>
parents: 970
diff changeset
140 #endif /* DROPBEAR_AUTH_H_ */