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290
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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
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12
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336
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13 ngx_int_t
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14 ngx_mail_pop3_parse_command(ngx_mail_session_t *s)
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290
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15 {
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16 u_char ch, *p, *c, c0, c1, c2, c3;
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17 ngx_str_t *arg;
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18 enum {
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19 sw_start = 0,
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20 sw_spaces_before_argument,
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21 sw_argument,
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22 sw_almost_done
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23 } state;
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24
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25 state = s->state;
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26
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27 for (p = s->buffer->pos; p < s->buffer->last; p++) {
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28 ch = *p;
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29
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30 switch (state) {
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31
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32 /* POP3 command */
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33 case sw_start:
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34 if (ch == ' ' || ch == CR || ch == LF) {
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35 c = s->buffer->start;
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36
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37 if (p - c == 4) {
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38
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39 c0 = ngx_toupper(c[0]);
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40 c1 = ngx_toupper(c[1]);
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41 c2 = ngx_toupper(c[2]);
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42 c3 = ngx_toupper(c[3]);
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43
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44 if (c0 == 'U' && c1 == 'S' && c2 == 'E' && c3 == 'R')
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45 {
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46 s->command = NGX_POP3_USER;
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47
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48 } else if (c0 == 'P' && c1 == 'A' && c2 == 'S' && c3 == 'S')
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49 {
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50 s->command = NGX_POP3_PASS;
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51
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52 } else if (c0 == 'A' && c1 == 'P' && c2 == 'O' && c3 == 'P')
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53 {
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54 s->command = NGX_POP3_APOP;
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55
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56 } else if (c0 == 'Q' && c1 == 'U' && c2 == 'I' && c3 == 'T')
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57 {
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58 s->command = NGX_POP3_QUIT;
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59
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60 } else if (c0 == 'C' && c1 == 'A' && c2 == 'P' && c3 == 'A')
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61 {
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62 s->command = NGX_POP3_CAPA;
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63
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64 } else if (c0 == 'A' && c1 == 'U' && c2 == 'T' && c3 == 'H')
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65 {
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66 s->command = NGX_POP3_AUTH;
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67
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68 } else if (c0 == 'N' && c1 == 'O' && c2 == 'O' && c3 == 'P')
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69 {
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70 s->command = NGX_POP3_NOOP;
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71 #if (NGX_MAIL_SSL)
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72 } else if (c0 == 'S' && c1 == 'T' && c2 == 'L' && c3 == 'S')
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73 {
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74 s->command = NGX_POP3_STLS;
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75 #endif
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76 } else {
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77 goto invalid;
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78 }
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79
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80 } else {
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81 goto invalid;
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82 }
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83
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84 switch (ch) {
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85 case ' ':
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86 state = sw_spaces_before_argument;
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87 break;
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88 case CR:
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89 state = sw_almost_done;
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90 break;
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91 case LF:
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92 goto done;
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93 }
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94 break;
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95 }
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96
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97 if ((ch < 'A' || ch > 'Z') && (ch < 'a' || ch > 'z')) {
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98 goto invalid;
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99 }
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100
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101 break;
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102
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103 case sw_spaces_before_argument:
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104 switch (ch) {
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105 case ' ':
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106 break;
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107 case CR:
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108 state = sw_almost_done;
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109 s->arg_end = p;
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110 break;
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111 case LF:
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112 s->arg_end = p;
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113 goto done;
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114 default:
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115 if (s->args.nelts <= 2) {
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116 state = sw_argument;
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117 s->arg_start = p;
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118 break;
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119 }
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120 goto invalid;
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121 }
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122 break;
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123
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124 case sw_argument:
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125 switch (ch) {
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126
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127 case ' ':
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128
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129 /*
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130 * the space should be considered as part of the at username
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131 * or password, but not of argument in other commands
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132 */
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133
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134 if (s->command == NGX_POP3_USER
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135 || s->command == NGX_POP3_PASS)
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136 {
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137 break;
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138 }
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139
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140 /* fall through */
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141
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142 case CR:
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143 case LF:
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144 arg = ngx_array_push(&s->args);
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145 if (arg == NULL) {
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146 return NGX_ERROR;
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147 }
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148 arg->len = p - s->arg_start;
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149 arg->data = s->arg_start;
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150 s->arg_start = NULL;
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151
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152 switch (ch) {
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153 case ' ':
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154 state = sw_spaces_before_argument;
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155 break;
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156 case CR:
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157 state = sw_almost_done;
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158 break;
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159 case LF:
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160 goto done;
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161 }
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162 break;
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163
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164 default:
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165 break;
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166 }
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167 break;
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168
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169 case sw_almost_done:
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170 switch (ch) {
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171 case LF:
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172 goto done;
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173 default:
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174 goto invalid;
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175 }
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176 }
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177 }
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178
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179 s->buffer->pos = p;
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180 s->state = state;
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181
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182 return NGX_AGAIN;
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183
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184 done:
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185
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186 s->buffer->pos = p + 1;
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187
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188 if (s->arg_start) {
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189 arg = ngx_array_push(&s->args);
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190 if (arg == NULL) {
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191 return NGX_ERROR;
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192 }
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193 arg->len = s->arg_end - s->arg_start;
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194 arg->data = s->arg_start;
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195 s->arg_start = NULL;
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196 }
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197
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198 s->state = (s->command != NGX_POP3_AUTH) ? sw_start : sw_argument;
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199
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200 return NGX_OK;
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201
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202 invalid:
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203
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204 s->state = sw_start;
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205 s->arg_start = NULL;
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206
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207 return NGX_MAIL_PARSE_INVALID_COMMAND;
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208 }
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209
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210
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336
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211 ngx_int_t
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212 ngx_mail_imap_parse_command(ngx_mail_session_t *s)
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290
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213 {
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214 u_char ch, *p, *c;
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215 ngx_str_t *arg;
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216 enum {
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217 sw_start = 0,
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218 sw_spaces_before_command,
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219 sw_command,
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220 sw_spaces_before_argument,
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221 sw_argument,
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222 sw_backslash,
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223 sw_literal,
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224 sw_no_sync_literal_argument,
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225 sw_start_literal_argument,
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226 sw_literal_argument,
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227 sw_end_literal_argument,
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228 sw_almost_done
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229 } state;
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230
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231 state = s->state;
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232
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233 for (p = s->buffer->pos; p < s->buffer->last; p++) {
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234 ch = *p;
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235
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236 switch (state) {
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237
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238 /* IMAP tag */
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239 case sw_start:
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240 switch (ch) {
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241 case ' ':
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242 s->tag.len = p - s->buffer->start + 1;
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243 s->tag.data = s->buffer->start;
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244 state = sw_spaces_before_command;
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245 break;
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246 case CR:
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247 s->state = sw_start;
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248 return NGX_MAIL_PARSE_INVALID_COMMAND;
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249 case LF:
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250 s->state = sw_start;
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251 return NGX_MAIL_PARSE_INVALID_COMMAND;
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252 }
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253 break;
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254
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255 case sw_spaces_before_command:
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256 switch (ch) {
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257 case ' ':
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258 break;
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259 case CR:
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260 s->state = sw_start;
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261 return NGX_MAIL_PARSE_INVALID_COMMAND;
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262 case LF:
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263 s->state = sw_start;
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264 return NGX_MAIL_PARSE_INVALID_COMMAND;
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265 default:
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266 s->cmd_start = p;
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267 state = sw_command;
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268 break;
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269 }
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270 break;
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271
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272 case sw_command:
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273 if (ch == ' ' || ch == CR || ch == LF) {
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274
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275 c = s->cmd_start;
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276
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277 switch (p - c) {
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278
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279 case 4:
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280 if ((c[0] == 'N' || c[0] == 'n')
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281 && (c[1] == 'O'|| c[1] == 'o')
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282 && (c[2] == 'O'|| c[2] == 'o')
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283 && (c[3] == 'P'|| c[3] == 'p'))
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284 {
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285 s->command = NGX_IMAP_NOOP;
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286
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287 } else {
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288 goto invalid;
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289 }
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290 break;
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291
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292 case 5:
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293 if ((c[0] == 'L'|| c[0] == 'l')
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294 && (c[1] == 'O'|| c[1] == 'o')
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295 && (c[2] == 'G'|| c[2] == 'g')
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296 && (c[3] == 'I'|| c[3] == 'i')
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297 && (c[4] == 'N'|| c[4] == 'n'))
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298 {
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299 s->command = NGX_IMAP_LOGIN;
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300
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301 } else {
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302 goto invalid;
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303 }
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304 break;
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305
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306 case 6:
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307 if ((c[0] == 'L'|| c[0] == 'l')
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308 && (c[1] == 'O'|| c[1] == 'o')
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309 && (c[2] == 'G'|| c[2] == 'g')
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310 && (c[3] == 'O'|| c[3] == 'o')
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311 && (c[4] == 'U'|| c[4] == 'u')
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312 && (c[5] == 'T'|| c[5] == 't'))
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313 {
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314 s->command = NGX_IMAP_LOGOUT;
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315
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316 } else {
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317 goto invalid;
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318 }
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319 break;
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320
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321 #if (NGX_MAIL_SSL)
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322 case 8:
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323 if ((c[0] == 'S'|| c[0] == 's')
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324 && (c[1] == 'T'|| c[1] == 't')
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325 && (c[2] == 'A'|| c[2] == 'a')
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326 && (c[3] == 'R'|| c[3] == 'r')
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327 && (c[4] == 'T'|| c[4] == 't')
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328 && (c[5] == 'T'|| c[5] == 't')
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329 && (c[6] == 'L'|| c[6] == 'l')
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330 && (c[7] == 'S'|| c[7] == 's'))
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331 {
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332 s->command = NGX_IMAP_STARTTLS;
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333
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334 } else {
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335 goto invalid;
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336 }
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337 break;
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338 #endif
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339
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340 case 10:
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341 if ((c[0] == 'C'|| c[0] == 'c')
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342 && (c[1] == 'A'|| c[1] == 'a')
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343 && (c[2] == 'P'|| c[2] == 'p')
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344 && (c[3] == 'A'|| c[3] == 'a')
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345 && (c[4] == 'B'|| c[4] == 'b')
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346 && (c[5] == 'I'|| c[5] == 'i')
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347 && (c[6] == 'L'|| c[6] == 'l')
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348 && (c[7] == 'I'|| c[7] == 'i')
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349 && (c[8] == 'T'|| c[8] == 't')
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350 && (c[9] == 'Y'|| c[9] == 'y'))
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351 {
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352 s->command = NGX_IMAP_CAPABILITY;
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353
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354 } else {
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355 goto invalid;
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356 }
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357 break;
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358
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322
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359 case 12:
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360 if ((c[0] == 'A'|| c[0] == 'a')
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361 && (c[1] == 'U'|| c[1] == 'u')
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362 && (c[2] == 'T'|| c[2] == 't')
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363 && (c[3] == 'H'|| c[3] == 'h')
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364 && (c[4] == 'E'|| c[4] == 'e')
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365 && (c[5] == 'N'|| c[5] == 'n')
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366 && (c[6] == 'T'|| c[6] == 't')
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367 && (c[7] == 'I'|| c[7] == 'i')
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368 && (c[8] == 'C'|| c[8] == 'c')
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369 && (c[9] == 'A'|| c[9] == 'a')
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370 && (c[10] == 'T'|| c[10] == 't')
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371 && (c[11] == 'E'|| c[11] == 'e'))
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372 {
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373 s->command = NGX_IMAP_AUTHENTICATE;
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374
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375 } else {
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376 goto invalid;
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377 }
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378 break;
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379
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290
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380 default:
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381 goto invalid;
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382 }
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383
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384 switch (ch) {
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385 case ' ':
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386 state = sw_spaces_before_argument;
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387 break;
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388 case CR:
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389 state = sw_almost_done;
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390 break;
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391 case LF:
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392 goto done;
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393 }
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394 break;
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395 }
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396
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397 if ((ch < 'A' || ch > 'Z') && (ch < 'a' || ch > 'z')) {
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398 goto invalid;
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399 }
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400
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401 break;
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402
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403 case sw_spaces_before_argument:
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404 switch (ch) {
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405 case ' ':
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406 break;
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407 case CR:
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408 state = sw_almost_done;
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409 s->arg_end = p;
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410 break;
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411 case LF:
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412 s->arg_end = p;
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413 goto done;
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414 case '"':
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415 if (s->args.nelts <= 2) {
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416 s->quoted = 1;
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417 s->arg_start = p + 1;
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418 state = sw_argument;
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419 break;
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420 }
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421 goto invalid;
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422 case '{':
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423 if (s->args.nelts <= 2) {
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424 state = sw_literal;
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425 break;
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426 }
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427 goto invalid;
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428 default:
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429 if (s->args.nelts <= 2) {
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430 s->arg_start = p;
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431 state = sw_argument;
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432 break;
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433 }
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434 goto invalid;
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435 }
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436 break;
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437
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438 case sw_argument:
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328
|
439 if (ch == ' ' && s->quoted) {
|
|
|
440 break;
|
|
|
441 }
|
|
|
442
|
|
290
|
443 switch (ch) {
|
|
|
444 case '"':
|
|
|
445 if (!s->quoted) {
|
|
|
446 break;
|
|
|
447 }
|
|
|
448 s->quoted = 0;
|
|
|
449 /* fall through */
|
|
|
450 case ' ':
|
|
|
451 case CR:
|
|
|
452 case LF:
|
|
|
453 arg = ngx_array_push(&s->args);
|
|
|
454 if (arg == NULL) {
|
|
|
455 return NGX_ERROR;
|
|
|
456 }
|
|
|
457 arg->len = p - s->arg_start;
|
|
|
458 arg->data = s->arg_start;
|
|
|
459 s->arg_start = NULL;
|
|
|
460
|
|
|
461 switch (ch) {
|
|
|
462 case '"':
|
|
|
463 case ' ':
|
|
|
464 state = sw_spaces_before_argument;
|
|
|
465 break;
|
|
|
466 case CR:
|
|
|
467 state = sw_almost_done;
|
|
|
468 break;
|
|
|
469 case LF:
|
|
|
470 goto done;
|
|
|
471 }
|
|
|
472 break;
|
|
|
473 case '\\':
|
|
|
474 if (s->quoted) {
|
|
|
475 s->backslash = 1;
|
|
|
476 state = sw_backslash;
|
|
|
477 }
|
|
|
478 break;
|
|
|
479 }
|
|
|
480 break;
|
|
|
481
|
|
|
482 case sw_backslash:
|
|
|
483 switch (ch) {
|
|
|
484 case CR:
|
|
|
485 case LF:
|
|
|
486 goto invalid;
|
|
|
487 default:
|
|
|
488 state = sw_argument;
|
|
|
489 }
|
|
|
490 break;
|
|
|
491
|
|
|
492 case sw_literal:
|
|
|
493 if (ch >= '0' && ch <= '9') {
|
|
|
494 s->literal_len = s->literal_len * 10 + (ch - '0');
|
|
|
495 break;
|
|
|
496 }
|
|
|
497 if (ch == '}') {
|
|
|
498 state = sw_start_literal_argument;
|
|
|
499 break;
|
|
|
500 }
|
|
|
501 if (ch == '+') {
|
|
|
502 state = sw_no_sync_literal_argument;
|
|
|
503 break;
|
|
|
504 }
|
|
|
505 goto invalid;
|
|
|
506
|
|
|
507 case sw_no_sync_literal_argument:
|
|
|
508 if (ch == '}') {
|
|
|
509 s->no_sync_literal = 1;
|
|
|
510 state = sw_start_literal_argument;
|
|
|
511 break;
|
|
|
512 }
|
|
|
513 goto invalid;
|
|
|
514
|
|
|
515 case sw_start_literal_argument:
|
|
|
516 switch (ch) {
|
|
|
517 case CR:
|
|
|
518 break;
|
|
|
519 case LF:
|
|
|
520 s->buffer->pos = p + 1;
|
|
|
521 s->arg_start = p + 1;
|
|
|
522 if (s->no_sync_literal == 0) {
|
|
|
523 s->state = sw_literal_argument;
|
|
|
524 return NGX_IMAP_NEXT;
|
|
|
525 }
|
|
|
526 state = sw_literal_argument;
|
|
|
527 s->no_sync_literal = 0;
|
|
|
528 break;
|
|
|
529 default:
|
|
|
530 goto invalid;
|
|
|
531 }
|
|
|
532 break;
|
|
|
533
|
|
|
534 case sw_literal_argument:
|
|
|
535 if (s->literal_len && --s->literal_len) {
|
|
|
536 break;
|
|
|
537 }
|
|
|
538
|
|
|
539 arg = ngx_array_push(&s->args);
|
|
|
540 if (arg == NULL) {
|
|
|
541 return NGX_ERROR;
|
|
|
542 }
|
|
|
543 arg->len = p + 1 - s->arg_start;
|
|
|
544 arg->data = s->arg_start;
|
|
|
545 s->arg_start = NULL;
|
|
|
546 state = sw_end_literal_argument;
|
|
|
547
|
|
|
548 break;
|
|
|
549
|
|
|
550 case sw_end_literal_argument:
|
|
|
551 switch (ch) {
|
|
|
552 case '{':
|
|
|
553 if (s->args.nelts <= 2) {
|
|
|
554 state = sw_literal;
|
|
|
555 break;
|
|
|
556 }
|
|
|
557 goto invalid;
|
|
|
558 case CR:
|
|
|
559 state = sw_almost_done;
|
|
|
560 break;
|
|
|
561 case LF:
|
|
|
562 goto done;
|
|
|
563 default:
|
|
|
564 state = sw_spaces_before_argument;
|
|
|
565 break;
|
|
|
566 }
|
|
|
567 break;
|
|
|
568
|
|
|
569 case sw_almost_done:
|
|
|
570 switch (ch) {
|
|
|
571 case LF:
|
|
|
572 goto done;
|
|
|
573 default:
|
|
|
574 goto invalid;
|
|
|
575 }
|
|
|
576 }
|
|
|
577 }
|
|
|
578
|
|
|
579 s->buffer->pos = p;
|
|
|
580 s->state = state;
|
|
|
581
|
|
|
582 return NGX_AGAIN;
|
|
|
583
|
|
|
584 done:
|
|
|
585
|
|
|
586 s->buffer->pos = p + 1;
|
|
|
587
|
|
|
588 if (s->arg_start) {
|
|
|
589 arg = ngx_array_push(&s->args);
|
|
|
590 if (arg == NULL) {
|
|
|
591 return NGX_ERROR;
|
|
|
592 }
|
|
|
593 arg->len = s->arg_end - s->arg_start;
|
|
|
594 arg->data = s->arg_start;
|
|
|
595
|
|
|
596 s->arg_start = NULL;
|
|
|
597 s->cmd_start = NULL;
|
|
|
598 s->quoted = 0;
|
|
|
599 s->no_sync_literal = 0;
|
|
|
600 s->literal_len = 0;
|
|
|
601 }
|
|
|
602
|
|
322
|
603 s->state = (s->command != NGX_IMAP_AUTHENTICATE) ? sw_start : sw_argument;
|
|
290
|
604
|
|
|
605 return NGX_OK;
|
|
|
606
|
|
|
607 invalid:
|
|
|
608
|
|
|
609 s->state = sw_start;
|
|
|
610 s->quoted = 0;
|
|
|
611 s->no_sync_literal = 0;
|
|
|
612 s->literal_len = 0;
|
|
|
613
|
|
|
614 return NGX_MAIL_PARSE_INVALID_COMMAND;
|
|
|
615 }
|
|
|
616
|
|
|
617
|
|
336
|
618 ngx_int_t
|
|
|
619 ngx_mail_smtp_parse_command(ngx_mail_session_t *s)
|
|
290
|
620 {
|
|
|
621 u_char ch, *p, *c, c0, c1, c2, c3;
|
|
|
622 ngx_str_t *arg;
|
|
|
623 enum {
|
|
|
624 sw_start = 0,
|
|
|
625 sw_spaces_before_argument,
|
|
|
626 sw_argument,
|
|
|
627 sw_almost_done
|
|
|
628 } state;
|
|
|
629
|
|
|
630 state = s->state;
|
|
|
631
|
|
|
632 for (p = s->buffer->pos; p < s->buffer->last; p++) {
|
|
|
633 ch = *p;
|
|
|
634
|
|
|
635 switch (state) {
|
|
|
636
|
|
|
637 /* SMTP command */
|
|
|
638 case sw_start:
|
|
|
639 if (ch == ' ' || ch == CR || ch == LF) {
|
|
|
640 c = s->buffer->start;
|
|
|
641
|
|
|
642 if (p - c == 4) {
|
|
|
643
|
|
|
644 c0 = ngx_toupper(c[0]);
|
|
|
645 c1 = ngx_toupper(c[1]);
|
|
|
646 c2 = ngx_toupper(c[2]);
|
|
|
647 c3 = ngx_toupper(c[3]);
|
|
|
648
|
|
|
649 if (c0 == 'H' && c1 == 'E' && c2 == 'L' && c3 == 'O')
|
|
|
650 {
|
|
|
651 s->command = NGX_SMTP_HELO;
|
|
|
652
|
|
|
653 } else if (c0 == 'E' && c1 == 'H' && c2 == 'L' && c3 == 'O')
|
|
|
654 {
|
|
|
655 s->command = NGX_SMTP_EHLO;
|
|
|
656
|
|
|
657 } else if (c0 == 'Q' && c1 == 'U' && c2 == 'I' && c3 == 'T')
|
|
|
658 {
|
|
|
659 s->command = NGX_SMTP_QUIT;
|
|
|
660
|
|
|
661 } else if (c0 == 'A' && c1 == 'U' && c2 == 'T' && c3 == 'H')
|
|
|
662 {
|
|
|
663 s->command = NGX_SMTP_AUTH;
|
|
|
664
|
|
|
665 } else if (c0 == 'N' && c1 == 'O' && c2 == 'O' && c3 == 'P')
|
|
|
666 {
|
|
|
667 s->command = NGX_SMTP_NOOP;
|
|
|
668
|
|
|
669 } else if (c0 == 'M' && c1 == 'A' && c2 == 'I' && c3 == 'L')
|
|
|
670 {
|
|
|
671 s->command = NGX_SMTP_MAIL;
|
|
|
672
|
|
|
673 } else if (c0 == 'R' && c1 == 'S' && c2 == 'E' && c3 == 'T')
|
|
|
674 {
|
|
|
675 s->command = NGX_SMTP_RSET;
|
|
|
676
|
|
322
|
677 } else if (c0 == 'R' && c1 == 'C' && c2 == 'P' && c3 == 'T')
|
|
|
678 {
|
|
|
679 s->command = NGX_SMTP_RCPT;
|
|
|
680
|
|
|
681 } else if (c0 == 'V' && c1 == 'R' && c2 == 'F' && c3 == 'Y')
|
|
|
682 {
|
|
|
683 s->command = NGX_SMTP_VRFY;
|
|
|
684
|
|
|
685 } else if (c0 == 'E' && c1 == 'X' && c2 == 'P' && c3 == 'N')
|
|
|
686 {
|
|
|
687 s->command = NGX_SMTP_EXPN;
|
|
|
688
|
|
|
689 } else if (c0 == 'H' && c1 == 'E' && c2 == 'L' && c3 == 'P')
|
|
|
690 {
|
|
|
691 s->command = NGX_SMTP_HELP;
|
|
|
692
|
|
290
|
693 } else {
|
|
|
694 goto invalid;
|
|
|
695 }
|
|
322
|
696 #if (NGX_MAIL_SSL)
|
|
|
697 } else if (p - c == 8) {
|
|
290
|
698
|
|
322
|
699 if ((c[0] == 'S'|| c[0] == 's')
|
|
|
700 && (c[1] == 'T'|| c[1] == 't')
|
|
|
701 && (c[2] == 'A'|| c[2] == 'a')
|
|
|
702 && (c[3] == 'R'|| c[3] == 'r')
|
|
|
703 && (c[4] == 'T'|| c[4] == 't')
|
|
|
704 && (c[5] == 'T'|| c[5] == 't')
|
|
|
705 && (c[6] == 'L'|| c[6] == 'l')
|
|
|
706 && (c[7] == 'S'|| c[7] == 's'))
|
|
|
707 {
|
|
|
708 s->command = NGX_SMTP_STARTTLS;
|
|
|
709
|
|
|
710 } else {
|
|
|
711 goto invalid;
|
|
|
712 }
|
|
|
713 #endif
|
|
290
|
714 } else {
|
|
|
715 goto invalid;
|
|
|
716 }
|
|
|
717
|
|
|
718 switch (ch) {
|
|
|
719 case ' ':
|
|
|
720 state = sw_spaces_before_argument;
|
|
|
721 break;
|
|
|
722 case CR:
|
|
|
723 state = sw_almost_done;
|
|
|
724 break;
|
|
|
725 case LF:
|
|
|
726 goto done;
|
|
|
727 }
|
|
|
728 break;
|
|
|
729 }
|
|
|
730
|
|
|
731 if ((ch < 'A' || ch > 'Z') && (ch < 'a' || ch > 'z')) {
|
|
|
732 goto invalid;
|
|
|
733 }
|
|
|
734
|
|
|
735 break;
|
|
|
736
|
|
|
737 case sw_spaces_before_argument:
|
|
|
738 switch (ch) {
|
|
|
739 case ' ':
|
|
|
740 break;
|
|
|
741 case CR:
|
|
|
742 state = sw_almost_done;
|
|
|
743 s->arg_end = p;
|
|
|
744 break;
|
|
|
745 case LF:
|
|
|
746 s->arg_end = p;
|
|
|
747 goto done;
|
|
|
748 default:
|
|
|
749 if (s->args.nelts <= 2) {
|
|
|
750 state = sw_argument;
|
|
|
751 s->arg_start = p;
|
|
|
752 break;
|
|
|
753 }
|
|
|
754 goto invalid;
|
|
|
755 }
|
|
|
756 break;
|
|
|
757
|
|
|
758 case sw_argument:
|
|
|
759 switch (ch) {
|
|
|
760 case ' ':
|
|
|
761 case CR:
|
|
|
762 case LF:
|
|
|
763 arg = ngx_array_push(&s->args);
|
|
|
764 if (arg == NULL) {
|
|
|
765 return NGX_ERROR;
|
|
|
766 }
|
|
|
767 arg->len = p - s->arg_start;
|
|
|
768 arg->data = s->arg_start;
|
|
|
769 s->arg_start = NULL;
|
|
|
770
|
|
|
771 switch (ch) {
|
|
|
772 case ' ':
|
|
|
773 state = sw_spaces_before_argument;
|
|
|
774 break;
|
|
|
775 case CR:
|
|
|
776 state = sw_almost_done;
|
|
|
777 break;
|
|
|
778 case LF:
|
|
|
779 goto done;
|
|
|
780 }
|
|
|
781 break;
|
|
|
782
|
|
|
783 default:
|
|
|
784 break;
|
|
|
785 }
|
|
|
786 break;
|
|
|
787
|
|
|
788 case sw_almost_done:
|
|
|
789 switch (ch) {
|
|
|
790 case LF:
|
|
|
791 goto done;
|
|
|
792 default:
|
|
|
793 goto invalid;
|
|
|
794 }
|
|
|
795 }
|
|
|
796 }
|
|
|
797
|
|
|
798 s->buffer->pos = p;
|
|
|
799 s->state = state;
|
|
|
800
|
|
|
801 return NGX_AGAIN;
|
|
|
802
|
|
|
803 done:
|
|
|
804
|
|
|
805 s->buffer->pos = p + 1;
|
|
|
806
|
|
|
807 if (s->arg_start) {
|
|
|
808 arg = ngx_array_push(&s->args);
|
|
|
809 if (arg == NULL) {
|
|
|
810 return NGX_ERROR;
|
|
|
811 }
|
|
|
812 arg->len = s->arg_end - s->arg_start;
|
|
|
813 arg->data = s->arg_start;
|
|
|
814 s->arg_start = NULL;
|
|
|
815 }
|
|
|
816
|
|
|
817 s->state = (s->command != NGX_SMTP_AUTH) ? sw_start : sw_argument;
|
|
|
818
|
|
|
819 return NGX_OK;
|
|
|
820
|
|
|
821 invalid:
|
|
|
822
|
|
|
823 s->state = sw_start;
|
|
|
824 s->arg_start = NULL;
|
|
|
825
|
|
|
826 return NGX_MAIL_PARSE_INVALID_COMMAND;
|
|
|
827 }
|
|
336
|
828
|
|
|
829
|
|
|
830 ngx_int_t
|
|
|
831 ngx_mail_auth_parse(ngx_mail_session_t *s, ngx_connection_t *c)
|
|
|
832 {
|
|
|
833 ngx_str_t *arg;
|
|
|
834
|
|
|
835 #if (NGX_MAIL_SSL)
|
|
|
836 if (ngx_mail_starttls_only(s, c)) {
|
|
|
837 return NGX_MAIL_PARSE_INVALID_COMMAND;
|
|
|
838 }
|
|
|
839 #endif
|
|
|
840
|
|
|
841 arg = s->args.elts;
|
|
|
842
|
|
|
843 if (arg[0].len == 5) {
|
|
|
844
|
|
|
845 if (ngx_strncasecmp(arg[0].data, (u_char *) "LOGIN", 5) == 0) {
|
|
|
846
|
|
|
847 if (s->args.nelts == 1) {
|
|
|
848 return NGX_MAIL_AUTH_LOGIN;
|
|
|
849 }
|
|
|
850
|
|
386
|
851 if (s->args.nelts == 2) {
|
|
|
852 return NGX_MAIL_AUTH_LOGIN_USERNAME;
|
|
|
853 }
|
|
|
854
|
|
336
|
855 return NGX_MAIL_PARSE_INVALID_COMMAND;
|
|
|
856 }
|
|
|
857
|
|
|
858 if (ngx_strncasecmp(arg[0].data, (u_char *) "PLAIN", 5) == 0) {
|
|
|
859
|
|
|
860 if (s->args.nelts == 1) {
|
|
|
861 return NGX_MAIL_AUTH_PLAIN;
|
|
|
862 }
|
|
|
863
|
|
|
864 if (s->args.nelts == 2) {
|
|
|
865 return ngx_mail_auth_plain(s, c, 1);
|
|
|
866 }
|
|
|
867 }
|
|
|
868
|
|
|
869 return NGX_MAIL_PARSE_INVALID_COMMAND;
|
|
|
870 }
|
|
|
871
|
|
|
872 if (arg[0].len == 8) {
|
|
|
873
|
|
|
874 if (s->args.nelts != 1) {
|
|
|
875 return NGX_MAIL_PARSE_INVALID_COMMAND;
|
|
|
876 }
|
|
|
877
|
|
|
878 if (ngx_strncasecmp(arg[0].data, (u_char *) "CRAM-MD5", 8) == 0) {
|
|
|
879 return NGX_MAIL_AUTH_CRAM_MD5;
|
|
|
880 }
|
|
|
881 }
|
|
|
882
|
|
|
883 return NGX_MAIL_PARSE_INVALID_COMMAND;
|
|
|
884 }
|
