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336
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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6
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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9 #include <ngx_event.h>
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10 #include <ngx_mail.h>
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11 #include <ngx_mail_smtp_module.h>
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12
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13
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366
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14 static void ngx_mail_smtp_resolve_addr_handler(ngx_resolver_ctx_t *ctx);
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442
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15 static void ngx_mail_smtp_resolve_name(ngx_event_t *rev);
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366
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16 static void ngx_mail_smtp_resolve_name_handler(ngx_resolver_ctx_t *ctx);
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17 static void ngx_mail_smtp_greeting(ngx_mail_session_t *s, ngx_connection_t *c);
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336
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18 static void ngx_mail_smtp_invalid_pipelining(ngx_event_t *rev);
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19 static ngx_int_t ngx_mail_smtp_create_buffer(ngx_mail_session_t *s,
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20 ngx_connection_t *c);
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21
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22 static ngx_int_t ngx_mail_smtp_helo(ngx_mail_session_t *s, ngx_connection_t *c);
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23 static ngx_int_t ngx_mail_smtp_auth(ngx_mail_session_t *s, ngx_connection_t *c);
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24 static ngx_int_t ngx_mail_smtp_mail(ngx_mail_session_t *s, ngx_connection_t *c);
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25 static ngx_int_t ngx_mail_smtp_starttls(ngx_mail_session_t *s,
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26 ngx_connection_t *c);
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420
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27 static ngx_int_t ngx_mail_smtp_rset(ngx_mail_session_t *s, ngx_connection_t *c);
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28 static ngx_int_t ngx_mail_smtp_rcpt(ngx_mail_session_t *s, ngx_connection_t *c);
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336
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29
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30 static ngx_int_t ngx_mail_smtp_discard_command(ngx_mail_session_t *s,
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31 ngx_connection_t *c, char *err);
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32 static void ngx_mail_smtp_log_rejected_command(ngx_mail_session_t *s,
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33 ngx_connection_t *c, char *err);
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34
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35
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36 static u_char smtp_ok[] = "250 2.0.0 OK" CRLF;
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37 static u_char smtp_bye[] = "221 2.0.0 Bye" CRLF;
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358
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38 static u_char smtp_starttls[] = "220 2.0.0 Start TLS" CRLF;
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336
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39 static u_char smtp_next[] = "334 " CRLF;
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40 static u_char smtp_username[] = "334 VXNlcm5hbWU6" CRLF;
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41 static u_char smtp_password[] = "334 UGFzc3dvcmQ6" CRLF;
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42 static u_char smtp_invalid_command[] = "500 5.5.1 Invalid command" CRLF;
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43 static u_char smtp_invalid_pipelining[] =
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44 "503 5.5.0 Improper use of SMTP command pipelining" CRLF;
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45 static u_char smtp_invalid_argument[] = "501 5.5.4 Invalid argument" CRLF;
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46 static u_char smtp_auth_required[] = "530 5.7.1 Authentication required" CRLF;
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420
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47 static u_char smtp_bad_sequence[] = "503 5.5.1 Bad sequence of commands" CRLF;
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336
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48
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49
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366
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50 static ngx_str_t smtp_unavailable = ngx_string("[UNAVAILABLE]");
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51 static ngx_str_t smtp_tempunavail = ngx_string("[TEMPUNAVAIL]");
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52
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53
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336
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54 void
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55 ngx_mail_smtp_init_session(ngx_mail_session_t *s, ngx_connection_t *c)
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56 {
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366
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57 struct sockaddr_in *sin;
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58 ngx_resolver_ctx_t *ctx;
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59 ngx_mail_core_srv_conf_t *cscf;
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60
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61 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module);
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62
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63 if (cscf->resolver == NULL) {
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64 s->host = smtp_unavailable;
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65 ngx_mail_smtp_greeting(s, c);
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66 return;
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67 }
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68
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492
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69 if (c->sockaddr->sa_family != AF_INET) {
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70 s->host = smtp_tempunavail;
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71 ngx_mail_smtp_greeting(s, c);
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72 return;
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73 }
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74
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366
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75 c->log->action = "in resolving client address";
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76
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77 ctx = ngx_resolve_start(cscf->resolver, NULL);
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78 if (ctx == NULL) {
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79 ngx_mail_close_connection(c);
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80 return;
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81 }
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82
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83 /* AF_INET only */
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84
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85 sin = (struct sockaddr_in *) c->sockaddr;
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86
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87 ctx->addr = sin->sin_addr.s_addr;
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88 ctx->handler = ngx_mail_smtp_resolve_addr_handler;
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89 ctx->data = s;
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90 ctx->timeout = cscf->resolver_timeout;
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91
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92 if (ngx_resolve_addr(ctx) != NGX_OK) {
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93 ngx_mail_close_connection(c);
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94 }
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95 }
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96
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97
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98 static void
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99 ngx_mail_smtp_resolve_addr_handler(ngx_resolver_ctx_t *ctx)
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100 {
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442
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101 ngx_connection_t *c;
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102 ngx_mail_session_t *s;
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366
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103
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104 s = ctx->data;
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105 c = s->connection;
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106
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107 if (ctx->state) {
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108 ngx_log_error(NGX_LOG_ERR, c->log, 0,
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109 "%V could not be resolved (%i: %s)",
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110 &c->addr_text, ctx->state,
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111 ngx_resolver_strerror(ctx->state));
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112
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113 if (ctx->state == NGX_RESOLVE_NXDOMAIN) {
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114 s->host = smtp_unavailable;
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115
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116 } else {
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117 s->host = smtp_tempunavail;
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118 }
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119
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120 ngx_resolve_addr_done(ctx);
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121
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122 ngx_mail_smtp_greeting(s, s->connection);
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123
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124 return;
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125 }
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126
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127 c->log->action = "in resolving client hostname";
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128
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129 s->host.data = ngx_pstrdup(c->pool, &ctx->name);
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130 if (s->host.data == NULL) {
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131 ngx_resolve_addr_done(ctx);
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132 ngx_mail_close_connection(c);
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133 return;
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134 }
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135
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136 s->host.len = ctx->name.len;
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137
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138 ngx_resolve_addr_done(ctx);
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139
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140 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0,
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141 "address resolved: %V", &s->host);
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142
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442
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143 c->read->handler = ngx_mail_smtp_resolve_name;
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144
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145 ngx_post_event(c->read, &ngx_posted_events);
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146 }
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147
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148
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149 static void
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150 ngx_mail_smtp_resolve_name(ngx_event_t *rev)
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151 {
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152 ngx_connection_t *c;
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153 ngx_mail_session_t *s;
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154 ngx_resolver_ctx_t *ctx;
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155 ngx_mail_core_srv_conf_t *cscf;
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156
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157 c = rev->data;
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158 s = c->data;
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159
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366
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160 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module);
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161
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162 ctx = ngx_resolve_start(cscf->resolver, NULL);
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163 if (ctx == NULL) {
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164 ngx_mail_close_connection(c);
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165 return;
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166 }
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167
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168 ctx->name = s->host;
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169 ctx->type = NGX_RESOLVE_A;
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170 ctx->handler = ngx_mail_smtp_resolve_name_handler;
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171 ctx->data = s;
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172 ctx->timeout = cscf->resolver_timeout;
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173
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174 if (ngx_resolve_name(ctx) != NGX_OK) {
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175 ngx_mail_close_connection(c);
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176 }
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177 }
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178
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179
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180 static void
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181 ngx_mail_smtp_resolve_name_handler(ngx_resolver_ctx_t *ctx)
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182 {
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183 in_addr_t addr;
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184 ngx_uint_t i;
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185 ngx_connection_t *c;
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186 struct sockaddr_in *sin;
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187 ngx_mail_session_t *s;
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188
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189 s = ctx->data;
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190 c = s->connection;
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191
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192 if (ctx->state) {
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193 ngx_log_error(NGX_LOG_ERR, c->log, 0,
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542
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194 "\"%V\" could not be resolved (%i: %s)",
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366
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195 &ctx->name, ctx->state,
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196 ngx_resolver_strerror(ctx->state));
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197
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198 if (ctx->state == NGX_RESOLVE_NXDOMAIN) {
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199 s->host = smtp_unavailable;
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200
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201 } else {
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202 s->host = smtp_tempunavail;
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203 }
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204
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205 } else {
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206
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207 /* AF_INET only */
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208
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209 sin = (struct sockaddr_in *) c->sockaddr;
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210
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211 for (i = 0; i < ctx->naddrs; i++) {
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212
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213 addr = ctx->addrs[i];
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214
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215 ngx_log_debug4(NGX_LOG_DEBUG_MAIL, c->log, 0,
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216 "name was resolved to %ud.%ud.%ud.%ud",
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217 (ntohl(addr) >> 24) & 0xff,
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218 (ntohl(addr) >> 16) & 0xff,
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219 (ntohl(addr) >> 8) & 0xff,
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220 ntohl(addr) & 0xff);
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221
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222 if (addr == sin->sin_addr.s_addr) {
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223 goto found;
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224 }
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225 }
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226
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227 s->host = smtp_unavailable;
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228 }
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229
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230 found:
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231
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232 ngx_resolve_name_done(ctx);
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233
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234 ngx_mail_smtp_greeting(s, c);
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235 }
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236
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237
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238 static void
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239 ngx_mail_smtp_greeting(ngx_mail_session_t *s, ngx_connection_t *c)
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240 {
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336
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241 ngx_msec_t timeout;
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242 ngx_mail_core_srv_conf_t *cscf;
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243 ngx_mail_smtp_srv_conf_t *sscf;
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244
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366
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245 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0,
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246 "smtp greeting for \"%V\"", &s->host);
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247
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336
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248 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module);
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249 sscf = ngx_mail_get_module_srv_conf(s, ngx_mail_smtp_module);
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250
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251 timeout = sscf->greeting_delay ? sscf->greeting_delay : cscf->timeout;
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252 ngx_add_timer(c->read, timeout);
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253
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430
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254 if (ngx_handle_read_event(c->read, 0) != NGX_OK) {
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336
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255 ngx_mail_close_connection(c);
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256 }
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257
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258 if (sscf->greeting_delay) {
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259 c->read->handler = ngx_mail_smtp_invalid_pipelining;
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260 return;
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261 }
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262
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263 c->read->handler = ngx_mail_smtp_init_protocol;
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264
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265 s->out = sscf->greeting;
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266
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267 ngx_mail_send(c->write);
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268 }
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269
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270
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271 static void
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272 ngx_mail_smtp_invalid_pipelining(ngx_event_t *rev)
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273 {
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274 ngx_connection_t *c;
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275 ngx_mail_session_t *s;
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276 ngx_mail_core_srv_conf_t *cscf;
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277 ngx_mail_smtp_srv_conf_t *sscf;
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278
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279 c = rev->data;
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280 s = c->data;
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281
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282 c->log->action = "in delay pipelining state";
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283
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284 if (rev->timedout) {
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285
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286 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "delay greeting");
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287
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288 rev->timedout = 0;
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289
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290 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module);
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291
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292 c->read->handler = ngx_mail_smtp_init_protocol;
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293
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294 ngx_add_timer(c->read, cscf->timeout);
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295
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430
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296 if (ngx_handle_read_event(c->read, 0) != NGX_OK) {
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336
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297 ngx_mail_close_connection(c);
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298 return;
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299 }
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300
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301 sscf = ngx_mail_get_module_srv_conf(s, ngx_mail_smtp_module);
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302
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303 s->out = sscf->greeting;
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304
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305 } else {
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306
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307 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "invalid pipelining");
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308
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309 if (s->buffer == NULL) {
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310 if (ngx_mail_smtp_create_buffer(s, c) != NGX_OK) {
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311 return;
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312 }
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313 }
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314
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315 if (ngx_mail_smtp_discard_command(s, c,
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316 "client was rejected before greeting: \"%V\"")
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317 != NGX_OK)
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318 {
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319 return;
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320 }
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321
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570
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322 ngx_str_set(&s->out, smtp_invalid_pipelining);
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336
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323 }
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324
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325 ngx_mail_send(c->write);
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326 }
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327
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328
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329 void
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330 ngx_mail_smtp_init_protocol(ngx_event_t *rev)
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331 {
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332 ngx_connection_t *c;
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333 ngx_mail_session_t *s;
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334
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335 c = rev->data;
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336
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337 c->log->action = "in auth state";
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338
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339 if (rev->timedout) {
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340 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out");
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341 c->timedout = 1;
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342 ngx_mail_close_connection(c);
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343 return;
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344 }
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345
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346 s = c->data;
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347
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348 if (s->buffer == NULL) {
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349 if (ngx_mail_smtp_create_buffer(s, c) != NGX_OK) {
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350 return;
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351 }
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352 }
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353
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354 s->mail_state = ngx_smtp_start;
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355 c->read->handler = ngx_mail_smtp_auth_state;
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356
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357 ngx_mail_smtp_auth_state(rev);
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358 }
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359
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360
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361 static ngx_int_t
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362 ngx_mail_smtp_create_buffer(ngx_mail_session_t *s, ngx_connection_t *c)
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363 {
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364 ngx_mail_smtp_srv_conf_t *sscf;
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365
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366 if (ngx_array_init(&s->args, c->pool, 2, sizeof(ngx_str_t)) == NGX_ERROR) {
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367 ngx_mail_session_internal_server_error(s);
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368 return NGX_ERROR;
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369 }
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370
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371 sscf = ngx_mail_get_module_srv_conf(s, ngx_mail_smtp_module);
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372
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373 s->buffer = ngx_create_temp_buf(c->pool, sscf->client_buffer_size);
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374 if (s->buffer == NULL) {
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375 ngx_mail_session_internal_server_error(s);
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376 return NGX_ERROR;
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377 }
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378
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379 return NGX_OK;
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380 }
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381
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382
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383 void
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384 ngx_mail_smtp_auth_state(ngx_event_t *rev)
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385 {
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386 ngx_int_t rc;
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|
|
387 ngx_connection_t *c;
|
|
|
388 ngx_mail_session_t *s;
|
|
|
389
|
|
|
390 c = rev->data;
|
|
|
391 s = c->data;
|
|
|
392
|
|
|
393 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "smtp auth state");
|
|
|
394
|
|
|
395 if (rev->timedout) {
|
|
|
396 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out");
|
|
|
397 c->timedout = 1;
|
|
|
398 ngx_mail_close_connection(c);
|
|
|
399 return;
|
|
|
400 }
|
|
|
401
|
|
|
402 if (s->out.len) {
|
|
|
403 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "smtp send handler busy");
|
|
|
404 s->blocked = 1;
|
|
|
405 return;
|
|
|
406 }
|
|
|
407
|
|
|
408 s->blocked = 0;
|
|
|
409
|
|
|
410 rc = ngx_mail_read_command(s, c);
|
|
|
411
|
|
|
412 if (rc == NGX_AGAIN || rc == NGX_ERROR) {
|
|
|
413 return;
|
|
|
414 }
|
|
|
415
|
|
570
|
416 ngx_str_set(&s->out, smtp_ok);
|
|
336
|
417
|
|
|
418 if (rc == NGX_OK) {
|
|
|
419 switch (s->mail_state) {
|
|
|
420
|
|
|
421 case ngx_smtp_start:
|
|
|
422
|
|
|
423 switch (s->command) {
|
|
|
424
|
|
|
425 case NGX_SMTP_HELO:
|
|
|
426 case NGX_SMTP_EHLO:
|
|
|
427 rc = ngx_mail_smtp_helo(s, c);
|
|
|
428 break;
|
|
|
429
|
|
|
430 case NGX_SMTP_AUTH:
|
|
|
431 rc = ngx_mail_smtp_auth(s, c);
|
|
|
432 break;
|
|
|
433
|
|
|
434 case NGX_SMTP_QUIT:
|
|
|
435 s->quit = 1;
|
|
570
|
436 ngx_str_set(&s->out, smtp_bye);
|
|
336
|
437 break;
|
|
|
438
|
|
|
439 case NGX_SMTP_MAIL:
|
|
|
440 rc = ngx_mail_smtp_mail(s, c);
|
|
|
441 break;
|
|
|
442
|
|
420
|
443 case NGX_SMTP_RCPT:
|
|
|
444 rc = ngx_mail_smtp_rcpt(s, c);
|
|
|
445 break;
|
|
|
446
|
|
|
447 case NGX_SMTP_RSET:
|
|
|
448 rc = ngx_mail_smtp_rset(s, c);
|
|
|
449 break;
|
|
|
450
|
|
336
|
451 case NGX_SMTP_NOOP:
|
|
|
452 break;
|
|
|
453
|
|
|
454 case NGX_SMTP_STARTTLS:
|
|
|
455 rc = ngx_mail_smtp_starttls(s, c);
|
|
570
|
456 ngx_str_set(&s->out, smtp_starttls);
|
|
336
|
457 break;
|
|
|
458
|
|
|
459 default:
|
|
|
460 rc = NGX_MAIL_PARSE_INVALID_COMMAND;
|
|
|
461 break;
|
|
|
462 }
|
|
|
463
|
|
|
464 break;
|
|
|
465
|
|
|
466 case ngx_smtp_auth_login_username:
|
|
444
|
467 rc = ngx_mail_auth_login_username(s, c, 0);
|
|
336
|
468
|
|
570
|
469 ngx_str_set(&s->out, smtp_password);
|
|
336
|
470 s->mail_state = ngx_smtp_auth_login_password;
|
|
|
471 break;
|
|
|
472
|
|
|
473 case ngx_smtp_auth_login_password:
|
|
|
474 rc = ngx_mail_auth_login_password(s, c);
|
|
|
475 break;
|
|
|
476
|
|
|
477 case ngx_smtp_auth_plain:
|
|
|
478 rc = ngx_mail_auth_plain(s, c, 0);
|
|
|
479 break;
|
|
|
480
|
|
|
481 case ngx_smtp_auth_cram_md5:
|
|
|
482 rc = ngx_mail_auth_cram_md5(s, c);
|
|
|
483 break;
|
|
|
484 }
|
|
|
485 }
|
|
|
486
|
|
|
487 switch (rc) {
|
|
|
488
|
|
|
489 case NGX_DONE:
|
|
|
490 ngx_mail_auth(s, c);
|
|
|
491 return;
|
|
|
492
|
|
|
493 case NGX_ERROR:
|
|
|
494 ngx_mail_session_internal_server_error(s);
|
|
|
495 return;
|
|
|
496
|
|
|
497 case NGX_MAIL_PARSE_INVALID_COMMAND:
|
|
|
498 s->mail_state = ngx_smtp_start;
|
|
|
499 s->state = 0;
|
|
570
|
500 ngx_str_set(&s->out, smtp_invalid_command);
|
|
336
|
501
|
|
|
502 /* fall through */
|
|
|
503
|
|
|
504 case NGX_OK:
|
|
|
505 s->args.nelts = 0;
|
|
|
506 s->buffer->pos = s->buffer->start;
|
|
|
507 s->buffer->last = s->buffer->start;
|
|
|
508
|
|
|
509 if (s->state) {
|
|
|
510 s->arg_start = s->buffer->start;
|
|
|
511 }
|
|
|
512
|
|
|
513 ngx_mail_send(c->write);
|
|
|
514 }
|
|
|
515 }
|
|
|
516
|
|
|
517
|
|
|
518 static ngx_int_t
|
|
|
519 ngx_mail_smtp_helo(ngx_mail_session_t *s, ngx_connection_t *c)
|
|
|
520 {
|
|
|
521 ngx_str_t *arg;
|
|
|
522 ngx_mail_smtp_srv_conf_t *sscf;
|
|
|
523
|
|
|
524 if (s->args.nelts != 1) {
|
|
570
|
525 ngx_str_set(&s->out, smtp_invalid_argument);
|
|
336
|
526 s->state = 0;
|
|
|
527 return NGX_OK;
|
|
|
528 }
|
|
|
529
|
|
|
530 arg = s->args.elts;
|
|
|
531
|
|
|
532 s->smtp_helo.len = arg[0].len;
|
|
|
533
|
|
382
|
534 s->smtp_helo.data = ngx_pnalloc(c->pool, arg[0].len);
|
|
336
|
535 if (s->smtp_helo.data == NULL) {
|
|
|
536 return NGX_ERROR;
|
|
|
537 }
|
|
|
538
|
|
|
539 ngx_memcpy(s->smtp_helo.data, arg[0].data, arg[0].len);
|
|
|
540
|
|
570
|
541 ngx_str_null(&s->smtp_from);
|
|
|
542 ngx_str_null(&s->smtp_to);
|
|
420
|
543
|
|
336
|
544 sscf = ngx_mail_get_module_srv_conf(s, ngx_mail_smtp_module);
|
|
|
545
|
|
|
546 if (s->command == NGX_SMTP_HELO) {
|
|
|
547 s->out = sscf->server_name;
|
|
|
548
|
|
|
549 } else {
|
|
|
550 s->esmtp = 1;
|
|
|
551
|
|
|
552 #if (NGX_MAIL_SSL)
|
|
|
553
|
|
|
554 if (c->ssl == NULL) {
|
|
356
|
555 ngx_mail_ssl_conf_t *sslcf;
|
|
|
556
|
|
336
|
557 sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module);
|
|
|
558
|
|
|
559 if (sslcf->starttls == NGX_MAIL_STARTTLS_ON) {
|
|
|
560 s->out = sscf->starttls_capability;
|
|
|
561 return NGX_OK;
|
|
|
562 }
|
|
|
563
|
|
|
564 if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) {
|
|
|
565 s->out = sscf->starttls_only_capability;
|
|
|
566 return NGX_OK;
|
|
|
567 }
|
|
|
568 }
|
|
|
569 #endif
|
|
|
570
|
|
|
571 s->out = sscf->capability;
|
|
|
572 }
|
|
|
573
|
|
|
574 return NGX_OK;
|
|
|
575 }
|
|
|
576
|
|
|
577
|
|
|
578 static ngx_int_t
|
|
|
579 ngx_mail_smtp_auth(ngx_mail_session_t *s, ngx_connection_t *c)
|
|
|
580 {
|
|
|
581 ngx_int_t rc;
|
|
|
582 ngx_mail_core_srv_conf_t *cscf;
|
|
|
583 ngx_mail_smtp_srv_conf_t *sscf;
|
|
|
584
|
|
|
585 #if (NGX_MAIL_SSL)
|
|
|
586 if (ngx_mail_starttls_only(s, c)) {
|
|
|
587 return NGX_MAIL_PARSE_INVALID_COMMAND;
|
|
|
588 }
|
|
|
589 #endif
|
|
|
590
|
|
|
591 if (s->args.nelts == 0) {
|
|
570
|
592 ngx_str_set(&s->out, smtp_invalid_argument);
|
|
336
|
593 s->state = 0;
|
|
|
594 return NGX_OK;
|
|
|
595 }
|
|
|
596
|
|
|
597 rc = ngx_mail_auth_parse(s, c);
|
|
|
598
|
|
|
599 switch (rc) {
|
|
|
600
|
|
|
601 case NGX_MAIL_AUTH_LOGIN:
|
|
|
602
|
|
570
|
603 ngx_str_set(&s->out, smtp_username);
|
|
336
|
604 s->mail_state = ngx_smtp_auth_login_username;
|
|
|
605
|
|
|
606 return NGX_OK;
|
|
|
607
|
|
444
|
608 case NGX_MAIL_AUTH_LOGIN_USERNAME:
|
|
|
609
|
|
570
|
610 ngx_str_set(&s->out, smtp_password);
|
|
444
|
611 s->mail_state = ngx_smtp_auth_login_password;
|
|
|
612
|
|
|
613 return ngx_mail_auth_login_username(s, c, 1);
|
|
|
614
|
|
336
|
615 case NGX_MAIL_AUTH_PLAIN:
|
|
|
616
|
|
570
|
617 ngx_str_set(&s->out, smtp_next);
|
|
336
|
618 s->mail_state = ngx_smtp_auth_plain;
|
|
|
619
|
|
|
620 return NGX_OK;
|
|
|
621
|
|
|
622 case NGX_MAIL_AUTH_CRAM_MD5:
|
|
|
623
|
|
|
624 sscf = ngx_mail_get_module_srv_conf(s, ngx_mail_smtp_module);
|
|
|
625
|
|
|
626 if (!(sscf->auth_methods & NGX_MAIL_AUTH_CRAM_MD5_ENABLED)) {
|
|
|
627 return NGX_MAIL_PARSE_INVALID_COMMAND;
|
|
|
628 }
|
|
|
629
|
|
|
630 if (s->salt.data == NULL) {
|
|
|
631 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module);
|
|
|
632
|
|
|
633 if (ngx_mail_salt(s, c, cscf) != NGX_OK) {
|
|
|
634 return NGX_ERROR;
|
|
|
635 }
|
|
|
636 }
|
|
|
637
|
|
|
638 if (ngx_mail_auth_cram_md5_salt(s, c, "334 ", 4) == NGX_OK) {
|
|
|
639 s->mail_state = ngx_smtp_auth_cram_md5;
|
|
|
640 return NGX_OK;
|
|
|
641 }
|
|
|
642
|
|
|
643 return NGX_ERROR;
|
|
|
644 }
|
|
|
645
|
|
|
646 return rc;
|
|
|
647 }
|
|
|
648
|
|
|
649
|
|
|
650 static ngx_int_t
|
|
|
651 ngx_mail_smtp_mail(ngx_mail_session_t *s, ngx_connection_t *c)
|
|
|
652 {
|
|
420
|
653 u_char ch;
|
|
|
654 ngx_str_t l;
|
|
|
655 ngx_uint_t i;
|
|
|
656 ngx_mail_smtp_srv_conf_t *sscf;
|
|
|
657
|
|
|
658 sscf = ngx_mail_get_module_srv_conf(s, ngx_mail_smtp_module);
|
|
|
659
|
|
|
660 if (!(sscf->auth_methods & NGX_MAIL_AUTH_NONE_ENABLED)) {
|
|
|
661 ngx_mail_smtp_log_rejected_command(s, c, "client was rejected: \"%V\"");
|
|
570
|
662 ngx_str_set(&s->out, smtp_auth_required);
|
|
420
|
663 return NGX_OK;
|
|
|
664 }
|
|
|
665
|
|
|
666 /* auth none */
|
|
|
667
|
|
|
668 if (s->smtp_from.len) {
|
|
570
|
669 ngx_str_set(&s->out, smtp_bad_sequence);
|
|
420
|
670 return NGX_OK;
|
|
|
671 }
|
|
|
672
|
|
|
673 l.len = s->buffer->last - s->buffer->start;
|
|
|
674 l.data = s->buffer->start;
|
|
|
675
|
|
|
676 for (i = 0; i < l.len; i++) {
|
|
|
677 ch = l.data[i];
|
|
|
678
|
|
|
679 if (ch != CR && ch != LF) {
|
|
|
680 continue;
|
|
|
681 }
|
|
|
682
|
|
|
683 l.data[i] = ' ';
|
|
|
684 }
|
|
|
685
|
|
|
686 while (i) {
|
|
|
687 if (l.data[i - 1] != ' ') {
|
|
|
688 break;
|
|
|
689 }
|
|
|
690
|
|
|
691 i--;
|
|
|
692 }
|
|
|
693
|
|
|
694 l.len = i;
|
|
|
695
|
|
|
696 s->smtp_from.len = l.len;
|
|
|
697
|
|
|
698 s->smtp_from.data = ngx_pnalloc(c->pool, l.len);
|
|
|
699 if (s->smtp_from.data == NULL) {
|
|
|
700 return NGX_ERROR;
|
|
|
701 }
|
|
|
702
|
|
|
703 ngx_memcpy(s->smtp_from.data, l.data, l.len);
|
|
|
704
|
|
|
705 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0,
|
|
|
706 "smtp mail from:\"%V\"", &s->smtp_from);
|
|
|
707
|
|
570
|
708 ngx_str_set(&s->out, smtp_ok);
|
|
420
|
709
|
|
|
710 return NGX_OK;
|
|
|
711 }
|
|
336
|
712
|
|
420
|
713
|
|
|
714 static ngx_int_t
|
|
|
715 ngx_mail_smtp_rcpt(ngx_mail_session_t *s, ngx_connection_t *c)
|
|
|
716 {
|
|
|
717 u_char ch;
|
|
|
718 ngx_str_t l;
|
|
|
719 ngx_uint_t i;
|
|
|
720
|
|
|
721 if (s->smtp_from.len == 0) {
|
|
570
|
722 ngx_str_set(&s->out, smtp_bad_sequence);
|
|
420
|
723 return NGX_OK;
|
|
|
724 }
|
|
|
725
|
|
|
726 l.len = s->buffer->last - s->buffer->start;
|
|
|
727 l.data = s->buffer->start;
|
|
|
728
|
|
|
729 for (i = 0; i < l.len; i++) {
|
|
|
730 ch = l.data[i];
|
|
|
731
|
|
|
732 if (ch != CR && ch != LF) {
|
|
|
733 continue;
|
|
|
734 }
|
|
|
735
|
|
|
736 l.data[i] = ' ';
|
|
|
737 }
|
|
|
738
|
|
|
739 while (i) {
|
|
|
740 if (l.data[i - 1] != ' ') {
|
|
|
741 break;
|
|
|
742 }
|
|
|
743
|
|
|
744 i--;
|
|
|
745 }
|
|
|
746
|
|
|
747 l.len = i;
|
|
|
748
|
|
|
749 s->smtp_to.len = l.len;
|
|
|
750
|
|
|
751 s->smtp_to.data = ngx_pnalloc(c->pool, l.len);
|
|
|
752 if (s->smtp_to.data == NULL) {
|
|
|
753 return NGX_ERROR;
|
|
|
754 }
|
|
|
755
|
|
|
756 ngx_memcpy(s->smtp_to.data, l.data, l.len);
|
|
|
757
|
|
|
758 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0,
|
|
|
759 "smtp rcpt to:\"%V\"", &s->smtp_to);
|
|
|
760
|
|
|
761 s->auth_method = NGX_MAIL_AUTH_NONE;
|
|
|
762
|
|
|
763 return NGX_DONE;
|
|
|
764 }
|
|
|
765
|
|
|
766
|
|
|
767 static ngx_int_t
|
|
|
768 ngx_mail_smtp_rset(ngx_mail_session_t *s, ngx_connection_t *c)
|
|
|
769 {
|
|
570
|
770 ngx_str_null(&s->smtp_from);
|
|
|
771 ngx_str_null(&s->smtp_to);
|
|
|
772 ngx_str_set(&s->out, smtp_ok);
|
|
336
|
773
|
|
|
774 return NGX_OK;
|
|
|
775 }
|
|
|
776
|
|
|
777
|
|
|
778 static ngx_int_t
|
|
|
779 ngx_mail_smtp_starttls(ngx_mail_session_t *s, ngx_connection_t *c)
|
|
|
780 {
|
|
|
781 #if (NGX_MAIL_SSL)
|
|
|
782 ngx_mail_ssl_conf_t *sslcf;
|
|
|
783
|
|
|
784 if (c->ssl == NULL) {
|
|
|
785 sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module);
|
|
|
786 if (sslcf->starttls) {
|
|
|
787
|
|
|
788 /*
|
|
|
789 * RFC3207 requires us to discard any knowledge
|
|
|
790 * obtained from client before STARTTLS.
|
|
|
791 */
|
|
|
792
|
|
570
|
793 ngx_str_null(&s->smtp_helo);
|
|
|
794 ngx_str_null(&s->smtp_from);
|
|
|
795 ngx_str_null(&s->smtp_to);
|
|
336
|
796
|
|
|
797 c->read->handler = ngx_mail_starttls_handler;
|
|
|
798 return NGX_OK;
|
|
|
799 }
|
|
|
800 }
|
|
|
801
|
|
|
802 #endif
|
|
|
803
|
|
|
804 return NGX_MAIL_PARSE_INVALID_COMMAND;
|
|
|
805 }
|
|
|
806
|
|
|
807
|
|
|
808 static ngx_int_t
|
|
|
809 ngx_mail_smtp_discard_command(ngx_mail_session_t *s, ngx_connection_t *c,
|
|
|
810 char *err)
|
|
|
811 {
|
|
|
812 ssize_t n;
|
|
|
813
|
|
|
814 n = c->recv(c, s->buffer->last, s->buffer->end - s->buffer->last);
|
|
|
815
|
|
|
816 if (n == NGX_ERROR || n == 0) {
|
|
|
817 ngx_mail_close_connection(c);
|
|
|
818 return NGX_ERROR;
|
|
|
819 }
|
|
|
820
|
|
|
821 if (n > 0) {
|
|
|
822 s->buffer->last += n;
|
|
|
823 }
|
|
|
824
|
|
|
825 if (n == NGX_AGAIN) {
|
|
430
|
826 if (ngx_handle_read_event(c->read, 0) != NGX_OK) {
|
|
336
|
827 ngx_mail_session_internal_server_error(s);
|
|
|
828 return NGX_ERROR;
|
|
|
829 }
|
|
|
830
|
|
|
831 return NGX_AGAIN;
|
|
|
832 }
|
|
|
833
|
|
|
834 ngx_mail_smtp_log_rejected_command(s, c, err);
|
|
|
835
|
|
|
836 s->buffer->pos = s->buffer->start;
|
|
|
837 s->buffer->last = s->buffer->start;
|
|
|
838
|
|
|
839 return NGX_OK;
|
|
|
840 }
|
|
|
841
|
|
|
842
|
|
|
843 static void
|
|
|
844 ngx_mail_smtp_log_rejected_command(ngx_mail_session_t *s, ngx_connection_t *c,
|
|
|
845 char *err)
|
|
|
846 {
|
|
|
847 u_char ch;
|
|
|
848 ngx_str_t cmd;
|
|
|
849 ngx_uint_t i;
|
|
|
850
|
|
|
851 if (c->log->log_level < NGX_LOG_INFO) {
|
|
|
852 return;
|
|
|
853 }
|
|
|
854
|
|
|
855 cmd.len = s->buffer->last - s->buffer->start;
|
|
|
856 cmd.data = s->buffer->start;
|
|
|
857
|
|
|
858 for (i = 0; i < cmd.len; i++) {
|
|
|
859 ch = cmd.data[i];
|
|
|
860
|
|
|
861 if (ch != CR && ch != LF) {
|
|
|
862 continue;
|
|
|
863 }
|
|
|
864
|
|
|
865 cmd.data[i] = '_';
|
|
|
866 }
|
|
|
867
|
|
|
868 cmd.len = i;
|
|
|
869
|
|
|
870 ngx_log_error(NGX_LOG_INFO, c->log, 0, err, &cmd);
|
|
|
871 }
|
