Mercurial > dropbear
annotate auth.h @ 1742:6e71440b1e47 fuzz
Add fuzzer-client_nomaths, fix client fuzzer
author | Matt Johnston <matt@ucc.asn.au> |
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date | Sun, 18 Oct 2020 15:08:54 +0800 |
parents | 8a485389330f |
children | bf1912d2d6e9 |
rev | line source |
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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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27 |
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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(void); |
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33 void cli_authinitialise(void); |
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34 |
33 | 35 /* Server functions */ |
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36 void recv_msg_userauth_request(void); |
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37 void send_msg_userauth_failure(int partial, int incrfail); |
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38 void send_msg_userauth_success(void); |
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39 void send_msg_userauth_banner(const buffer *msg); |
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40 void svr_auth_password(int valid_user); |
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41 void svr_auth_pubkey(int valid_user); |
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42 void svr_auth_pam(int valid_user); |
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43 |
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44 #if DROPBEAR_SVR_PUBKEY_OPTIONS_BUILT |
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45 int svr_pubkey_allows_agentfwd(void); |
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46 int svr_pubkey_allows_tcpfwd(void); |
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47 int svr_pubkey_allows_x11fwd(void); |
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48 int svr_pubkey_allows_pty(void); |
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49 void svr_pubkey_set_forced_command(struct ChanSess *chansess); |
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50 void svr_pubkey_options_cleanup(void); |
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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(void) { } |
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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 |
33 | 63 /* Client functions */ |
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64 void recv_msg_userauth_failure(void); |
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65 void recv_msg_userauth_success(void); |
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66 void recv_msg_userauth_specific_60(void); |
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67 void recv_msg_userauth_pk_ok(void); |
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68 void recv_msg_userauth_info_request(void); |
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69 void cli_get_user(void); |
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70 void cli_auth_getmethods(void); |
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71 int cli_auth_try(void); |
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72 void recv_msg_userauth_banner(void); |
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73 void cli_pubkeyfail(void); |
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74 void cli_auth_password(void); |
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75 int cli_auth_pubkey(void); |
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76 void cli_auth_interactive(void); |
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77 char* getpass_or_cancel(const char* prompt); |
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78 void cli_auth_pubkey_cleanup(void); |
33 | 79 |
80 | |
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81 #define MAX_USERNAME_LEN 100 /* arbitrary for the moment */ |
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82 |
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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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98 |
33 | 99 /* This structure is shared between server and client - it contains |
100 * relatively little extraneous bits when used for the client rather than the | |
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 int authdone; /* 0 if we haven't authed, 1 if we have. Applies for |
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109 client and server (though has differing |
33 | 110 meanings). */ |
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111 |
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112 unsigned int perm_warn; /* Server only, set if bad permissions on |
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113 ~/.ssh/authorized_keys have already been |
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114 logged. */ |
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115 unsigned int checkusername_failed; /* Server only, set if checkusername |
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116 has already failed */ |
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117 struct timespec auth_starttime; /* Server only, time of receiving current |
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118 SSH_MSG_USERAUTH_REQUEST */ |
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119 |
33 | 120 /* These are only used for the server */ |
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121 uid_t pw_uid; |
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122 gid_t pw_gid; |
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123 char *pw_dir; |
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124 char *pw_shell; |
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125 char *pw_name; |
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126 char *pw_passwd; |
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127 #if DROPBEAR_SVR_PUBKEY_OPTIONS_BUILT |
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128 struct PubKeyOptions* pubkey_options; |
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129 #endif |
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130 }; |
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131 |
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132 #if DROPBEAR_SVR_PUBKEY_OPTIONS_BUILT |
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133 struct PubKeyOptions; |
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134 struct PubKeyOptions { |
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135 /* Flags */ |
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136 int no_port_forwarding_flag; |
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137 int no_agent_forwarding_flag; |
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138 int no_x11_forwarding_flag; |
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139 int no_pty_flag; |
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140 /* "command=" option. */ |
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141 char * forced_command; |
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142 }; |
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143 #endif |
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144 |
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DROPBEAR_ prefix for include guards to avoid collisions
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145 #endif /* DROPBEAR_AUTH_H_ */ |