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0
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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_http.h>
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10
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11
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58
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12 ngx_int_t
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13 ngx_http_parse_request_line(ngx_http_request_t *r, ngx_buf_t *b)
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0
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14 {
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56
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15 u_char c, ch, *p, *m;
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0
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16 enum {
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17 sw_start = 0,
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18 sw_method,
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19 sw_space_after_method,
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20 sw_spaces_before_uri,
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21 sw_schema,
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22 sw_schema_slash,
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23 sw_schema_slash_slash,
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24 sw_host,
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25 sw_port,
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26 sw_after_slash_in_uri,
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27 sw_check_uri,
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28 sw_uri,
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29 sw_http_09,
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30 sw_http_H,
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31 sw_http_HT,
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32 sw_http_HTT,
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33 sw_http_HTTP,
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34 sw_first_major_digit,
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35 sw_major_digit,
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36 sw_first_minor_digit,
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37 sw_minor_digit,
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28
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38 sw_almost_done
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0
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39 } state;
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40
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41 state = r->state;
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42
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28
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43 for (p = b->pos; p < b->last; p++) {
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44 ch = *p;
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0
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45
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46 /* gcc 2.95.2 and msvc 6.0 compile this switch as an jump table */
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47
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48 switch (state) {
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49
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50 /* HTTP methods: GET, HEAD, POST */
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51 case sw_start:
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28
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52 r->request_start = p;
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0
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53
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54 if (ch == CR || ch == LF) {
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55 break;
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56 }
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57
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58 if (ch < 'A' || ch > 'Z') {
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59 return NGX_HTTP_PARSE_INVALID_METHOD;
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60 }
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61
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62 state = sw_method;
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63 break;
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64
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65 case sw_method:
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66 if (ch == ' ') {
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58
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67 r->method_end = p - 1;
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0
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68 m = r->request_start;
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69
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28
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70 if (p - m == 3) {
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0
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71
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72 if (m[0] == 'G' && m[1] == 'E' && m[2] == 'T') {
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73 r->method = NGX_HTTP_GET;
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182
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74
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75 } else if (m[0] == 'P' && m[1] == 'U' && m[2] == 'T') {
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76 r->method = NGX_HTTP_PUT;
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0
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77 }
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78
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28
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79 } else if (p - m == 4) {
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0
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80
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81 if (m[0] == 'P' && m[1] == 'O'
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28
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82 && m[2] == 'S' && m[3] == 'T')
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0
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83 {
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84 r->method = NGX_HTTP_POST;
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85
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86 } else if (m[0] == 'H' && m[1] == 'E'
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87 && m[2] == 'A' && m[3] == 'D')
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88 {
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89 r->method = NGX_HTTP_HEAD;
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90 }
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182
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91
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92 } else if (p - m == 6) {
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93
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94 if (m[0] == 'D' && m[1] == 'E' && m[2] == 'L'
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95 && m[3] == 'E' && m[4] == 'T' && m[5] == 'E')
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96 {
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97 r->method = NGX_HTTP_DELETE;
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98 }
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0
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99 }
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100
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101 state = sw_spaces_before_uri;
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102 break;
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103 }
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104
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105 if (ch < 'A' || ch > 'Z') {
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106 return NGX_HTTP_PARSE_INVALID_METHOD;
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107 }
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108
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109 break;
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110
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111 /* single space after method */
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112 case sw_space_after_method:
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113 switch (ch) {
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114 case ' ':
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115 state = sw_spaces_before_uri;
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116 break;
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117 default:
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118 return NGX_HTTP_PARSE_INVALID_METHOD;
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119 }
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120 break;
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121
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122 /* space* before URI */
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123 case sw_spaces_before_uri:
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56
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124
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125 c = (u_char) (ch | 0x20);
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70
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126 if (c >= 'a' && c <= 'z') {
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38
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127 r->schema_start = p;
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128 state = sw_schema;
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129 break;
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130 }
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131
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0
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132 switch (ch) {
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133 case '/':
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28
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134 r->uri_start = p;
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0
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135 state = sw_after_slash_in_uri;
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136 break;
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137 case ' ':
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138 break;
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139 default:
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140 return NGX_HTTP_PARSE_INVALID_REQUEST;
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141 }
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142 break;
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143
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144 case sw_schema:
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56
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145
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146 c = (u_char) (ch | 0x20);
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70
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147 if (c >= 'a' && c <= 'z') {
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38
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148 break;
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149 }
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150
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0
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151 switch (ch) {
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152 case ':':
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28
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153 r->schema_end = p;
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0
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154 state = sw_schema_slash;
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155 break;
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156 default:
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157 return NGX_HTTP_PARSE_INVALID_REQUEST;
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158 }
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159 break;
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160
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161 case sw_schema_slash:
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162 switch (ch) {
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163 case '/':
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164 state = sw_schema_slash_slash;
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165 break;
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166 default:
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167 return NGX_HTTP_PARSE_INVALID_REQUEST;
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168 }
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169 break;
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170
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171 case sw_schema_slash_slash:
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172 switch (ch) {
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173 case '/':
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28
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174 r->host_start = p;
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0
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175 state = sw_host;
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176 break;
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177 default:
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178 return NGX_HTTP_PARSE_INVALID_REQUEST;
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179 }
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180 break;
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181
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182 case sw_host:
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56
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183
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184 c = (u_char) (ch | 0x20);
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70
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185 if (c >= 'a' && c <= 'z') {
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56
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186 break;
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187 }
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188
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189 if ((ch >= '0' && ch <= '9') || ch == '.' || ch == '-')
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38
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190 {
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191 break;
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192 }
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193
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0
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194 switch (ch) {
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195 case ':':
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28
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196 r->host_end = p;
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0
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197 state = sw_port;
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198 break;
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199 case '/':
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28
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200 r->host_end = p;
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201 r->uri_start = p;
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0
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202 state = sw_after_slash_in_uri;
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203 break;
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204 default:
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205 return NGX_HTTP_PARSE_INVALID_REQUEST;
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206 }
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207 break;
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208
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209 case sw_port:
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38
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210 if (ch >= '0' && ch <= '9') {
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211 break;
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212 }
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213
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0
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214 switch (ch) {
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215 case '/':
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28
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216 r->port_end = p;
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217 r->uri_start = p;
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0
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218 state = sw_after_slash_in_uri;
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219 break;
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220 default:
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38
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221 return NGX_HTTP_PARSE_INVALID_REQUEST;
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0
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222 }
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223 break;
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224
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10
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225 /* check "/.", "//", "%", and "\" (Win32) in URI */
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0
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226 case sw_after_slash_in_uri:
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38
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227
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56
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228 c = (u_char) (ch | 0x20);
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70
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229 if (c >= 'a' && c <= 'z') {
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56
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230 state = sw_check_uri;
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231 break;
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232 }
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233
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234 if (ch >= '0' && ch <= '9') {
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38
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235 state = sw_check_uri;
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236 break;
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237 }
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238
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0
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239 switch (ch) {
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38
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240 case ' ':
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241 r->uri_end = p;
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242 state = sw_http_09;
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243 break;
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0
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244 case CR:
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28
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245 r->uri_end = p;
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0
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246 r->http_minor = 9;
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247 state = sw_almost_done;
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248 break;
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249 case LF:
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28
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250 r->uri_end = p;
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0
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251 r->http_minor = 9;
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28
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252 goto done;
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0
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253 case '.':
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2
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254 r->complex_uri = 1;
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255 state = sw_uri;
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256 break;
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0
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257 case '%':
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2
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258 r->quoted_uri = 1;
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0
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259 state = sw_uri;
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260 break;
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38
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261 case '/':
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262 r->complex_uri = 1;
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263 state = sw_uri;
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264 break;
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10
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265 #if (NGX_WIN32)
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266 case '\\':
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267 r->complex_uri = 1;
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38
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268 state = sw_uri;
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10
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269 break;
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270 #endif
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38
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271 case '?':
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272 r->args_start = p + 1;
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273 state = sw_uri;
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0
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274 break;
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34
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275 case '+':
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276 r->plus_in_uri = 1;
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277 break;
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38
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278 case '\0':
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279 r->zero_in_uri = 1;
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0
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280 break;
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281 default:
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282 state = sw_check_uri;
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283 break;
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284 }
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285 break;
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286
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10
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287 /* check "/", "%" and "\" (Win32) in URI */
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0
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288 case sw_check_uri:
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38
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289
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56
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290 c = (u_char) (ch | 0x20);
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70
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291 if (c >= 'a' && c <= 'z') {
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56
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292 break;
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293 }
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294
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295 if (ch >= '0' && ch <= '9') {
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38
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296 break;
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297 }
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298
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0
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299 switch (ch) {
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38
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300 case '/':
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301 r->uri_ext = NULL;
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302 state = sw_after_slash_in_uri;
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303 break;
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304 case '.':
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305 r->uri_ext = p + 1;
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306 break;
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307 case ' ':
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308 r->uri_end = p;
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309 state = sw_http_09;
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310 break;
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0
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311 case CR:
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28
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312 r->uri_end = p;
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0
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313 r->http_minor = 9;
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314 state = sw_almost_done;
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315 break;
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316 case LF:
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28
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317 r->uri_end = p;
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0
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318 r->http_minor = 9;
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28
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319 goto done;
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10
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320 #if (NGX_WIN32)
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321 case '\\':
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322 r->complex_uri = 1;
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323 state = sw_after_slash_in_uri;
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324 break;
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325 #endif
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38
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326 case '%':
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327 r->quoted_uri = 1;
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328 state = sw_uri;
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0
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329 break;
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34
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330 case '+':
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331 r->plus_in_uri = 1;
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332 break;
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0
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333 case '?':
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28
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334 r->args_start = p + 1;
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0
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335 state = sw_uri;
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336 break;
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38
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337 case '\0':
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338 r->zero_in_uri = 1;
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339 break;
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0
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340 }
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341 break;
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342
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343 /* URI */
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344 case sw_uri:
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345 switch (ch) {
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38
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346 case ' ':
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347 r->uri_end = p;
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348 state = sw_http_09;
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349 break;
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0
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350 case CR:
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28
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351 r->uri_end = p;
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0
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352 r->http_minor = 9;
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353 state = sw_almost_done;
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354 break;
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355 case LF:
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28
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356 r->uri_end = p;
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0
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357 r->http_minor = 9;
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28
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358 goto done;
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34
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359 case '+':
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360 r->plus_in_uri = 1;
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361 break;
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38
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362 case '\0':
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363 r->zero_in_uri = 1;
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0
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364 break;
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365 }
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366 break;
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367
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368 /* space+ after URI */
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369 case sw_http_09:
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370 switch (ch) {
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371 case ' ':
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372 break;
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373 case CR:
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374 r->http_minor = 9;
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375 state = sw_almost_done;
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376 break;
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377 case LF:
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378 r->http_minor = 9;
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28
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379 goto done;
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0
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380 case 'H':
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28
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381 r->http_protocol.data = p;
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0
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382 state = sw_http_H;
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383 break;
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384 default:
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385 return NGX_HTTP_PARSE_INVALID_REQUEST;
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386 }
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387 break;
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388
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|
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389 case sw_http_H:
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390 switch (ch) {
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391 case 'T':
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392 state = sw_http_HT;
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393 break;
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394 default:
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395 return NGX_HTTP_PARSE_INVALID_REQUEST;
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396 }
|
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397 break;
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398
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|
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399 case sw_http_HT:
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400 switch (ch) {
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401 case 'T':
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402 state = sw_http_HTT;
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403 break;
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404 default:
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405 return NGX_HTTP_PARSE_INVALID_REQUEST;
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|
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406 }
|
|
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407 break;
|
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408
|
|
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409 case sw_http_HTT:
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410 switch (ch) {
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411 case 'P':
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412 state = sw_http_HTTP;
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413 break;
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414 default:
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415 return NGX_HTTP_PARSE_INVALID_REQUEST;
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416 }
|
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417 break;
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418
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|
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419 case sw_http_HTTP:
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420 switch (ch) {
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421 case '/':
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422 state = sw_first_major_digit;
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423 break;
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424 default:
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425 return NGX_HTTP_PARSE_INVALID_REQUEST;
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|
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426 }
|
|
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427 break;
|
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428
|
|
|
429 /* first digit of major HTTP version */
|
|
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430 case sw_first_major_digit:
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|
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431 if (ch < '1' || ch > '9') {
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|
432 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
433 }
|
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434
|
|
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435 r->http_major = ch - '0';
|
|
|
436 state = sw_major_digit;
|
|
|
437 break;
|
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438
|
|
|
439 /* major HTTP version or dot */
|
|
|
440 case sw_major_digit:
|
|
|
441 if (ch == '.') {
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|
|
442 state = sw_first_minor_digit;
|
|
|
443 break;
|
|
|
444 }
|
|
|
445
|
|
|
446 if (ch < '0' || ch > '9') {
|
|
|
447 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
448 }
|
|
|
449
|
|
|
450 r->http_major = r->http_major * 10 + ch - '0';
|
|
|
451 break;
|
|
|
452
|
|
|
453 /* first digit of minor HTTP version */
|
|
|
454 case sw_first_minor_digit:
|
|
|
455 if (ch < '0' || ch > '9') {
|
|
|
456 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
457 }
|
|
|
458
|
|
|
459 r->http_minor = ch - '0';
|
|
|
460 state = sw_minor_digit;
|
|
|
461 break;
|
|
|
462
|
|
|
463 /* minor HTTP version or end of request line */
|
|
|
464 case sw_minor_digit:
|
|
|
465 if (ch == CR) {
|
|
|
466 state = sw_almost_done;
|
|
|
467 break;
|
|
|
468 }
|
|
|
469
|
|
|
470 if (ch == LF) {
|
|
28
|
471 goto done;
|
|
0
|
472 }
|
|
|
473
|
|
|
474 if (ch < '0' || ch > '9') {
|
|
|
475 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
476 }
|
|
|
477
|
|
|
478 r->http_minor = r->http_minor * 10 + ch - '0';
|
|
|
479 break;
|
|
|
480
|
|
|
481 /* end of request line */
|
|
|
482 case sw_almost_done:
|
|
28
|
483 r->request_end = p - 1;
|
|
0
|
484 switch (ch) {
|
|
|
485 case LF:
|
|
28
|
486 goto done;
|
|
0
|
487 default:
|
|
|
488 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
489 }
|
|
|
490 }
|
|
|
491 }
|
|
|
492
|
|
|
493 b->pos = p;
|
|
28
|
494 r->state = state;
|
|
0
|
495
|
|
28
|
496 return NGX_AGAIN;
|
|
0
|
497
|
|
28
|
498 done:
|
|
|
499
|
|
|
500 b->pos = p + 1;
|
|
0
|
501
|
|
28
|
502 if (r->request_end == NULL) {
|
|
|
503 r->request_end = p;
|
|
|
504 }
|
|
0
|
505
|
|
28
|
506 r->http_version = r->http_major * 1000 + r->http_minor;
|
|
|
507 r->state = sw_start;
|
|
0
|
508
|
|
28
|
509 if (r->http_version == 9 && r->method != NGX_HTTP_GET) {
|
|
|
510 return NGX_HTTP_PARSE_INVALID_09_METHOD;
|
|
0
|
511 }
|
|
28
|
512
|
|
|
513 return NGX_OK;
|
|
0
|
514 }
|
|
|
515
|
|
|
516
|
|
58
|
517 ngx_int_t
|
|
|
518 ngx_http_parse_header_line(ngx_http_request_t *r, ngx_buf_t *b)
|
|
0
|
519 {
|
|
56
|
520 u_char c, ch, *p;
|
|
|
521 ngx_uint_t hash;
|
|
0
|
522 enum {
|
|
|
523 sw_start = 0,
|
|
|
524 sw_name,
|
|
|
525 sw_space_before_value,
|
|
|
526 sw_value,
|
|
|
527 sw_space_after_value,
|
|
52
|
528 sw_ignore_line,
|
|
0
|
529 sw_almost_done,
|
|
52
|
530 sw_header_almost_done
|
|
0
|
531 } state;
|
|
|
532
|
|
|
533 state = r->state;
|
|
56
|
534 hash = r->header_hash;
|
|
0
|
535
|
|
28
|
536 for (p = b->pos; p < b->last; p++) {
|
|
|
537 ch = *p;
|
|
0
|
538
|
|
|
539 switch (state) {
|
|
|
540
|
|
|
541 /* first char */
|
|
|
542 case sw_start:
|
|
60
|
543 r->invalid_header = 0;
|
|
|
544
|
|
0
|
545 switch (ch) {
|
|
|
546 case CR:
|
|
28
|
547 r->header_end = p;
|
|
0
|
548 state = sw_header_almost_done;
|
|
|
549 break;
|
|
|
550 case LF:
|
|
28
|
551 r->header_end = p;
|
|
|
552 goto header_done;
|
|
0
|
553 default:
|
|
|
554 state = sw_name;
|
|
28
|
555 r->header_name_start = p;
|
|
0
|
556
|
|
|
557 c = (u_char) (ch | 0x20);
|
|
|
558 if (c >= 'a' && c <= 'z') {
|
|
56
|
559 hash = c;
|
|
0
|
560 break;
|
|
|
561 }
|
|
|
562
|
|
|
563 if (ch >= '0' && ch <= '9') {
|
|
56
|
564 hash = ch;
|
|
0
|
565 break;
|
|
|
566 }
|
|
|
567
|
|
60
|
568 r->invalid_header = 1;
|
|
|
569
|
|
52
|
570 break;
|
|
0
|
571
|
|
|
572 }
|
|
|
573 break;
|
|
|
574
|
|
|
575 /* header name */
|
|
|
576 case sw_name:
|
|
|
577 c = (u_char) (ch | 0x20);
|
|
|
578 if (c >= 'a' && c <= 'z') {
|
|
56
|
579 hash += c;
|
|
0
|
580 break;
|
|
|
581 }
|
|
|
582
|
|
|
583 if (ch == ':') {
|
|
28
|
584 r->header_name_end = p;
|
|
0
|
585 state = sw_space_before_value;
|
|
|
586 break;
|
|
|
587 }
|
|
|
588
|
|
52
|
589 if (ch == '-') {
|
|
56
|
590 hash += ch;
|
|
0
|
591 break;
|
|
|
592 }
|
|
|
593
|
|
|
594 if (ch >= '0' && ch <= '9') {
|
|
56
|
595 hash += ch;
|
|
0
|
596 break;
|
|
|
597 }
|
|
|
598
|
|
58
|
599 if (ch == CR) {
|
|
|
600 r->header_name_end = p;
|
|
|
601 r->header_start = p;
|
|
|
602 r->header_end = p;
|
|
|
603 state = sw_almost_done;
|
|
|
604 break;
|
|
|
605 }
|
|
|
606
|
|
|
607 if (ch == LF) {
|
|
|
608 r->header_name_end = p;
|
|
|
609 r->header_start = p;
|
|
|
610 r->header_end = p;
|
|
|
611 goto done;
|
|
|
612 }
|
|
|
613
|
|
2
|
614 /* IIS may send the duplicate "HTTP/1.1 ..." lines */
|
|
0
|
615 if (ch == '/'
|
|
58
|
616 && r->upstream
|
|
|
617 && p - r->header_name_start == 4
|
|
|
618 && ngx_strncmp(r->header_name_start, "HTTP", 4) == 0)
|
|
0
|
619 {
|
|
|
620 state = sw_ignore_line;
|
|
|
621 break;
|
|
|
622 }
|
|
|
623
|
|
60
|
624 r->invalid_header = 1;
|
|
|
625
|
|
52
|
626 break;
|
|
0
|
627
|
|
|
628 /* space* before header value */
|
|
|
629 case sw_space_before_value:
|
|
|
630 switch (ch) {
|
|
|
631 case ' ':
|
|
|
632 break;
|
|
|
633 case CR:
|
|
58
|
634 r->header_start = p;
|
|
|
635 r->header_end = p;
|
|
0
|
636 state = sw_almost_done;
|
|
|
637 break;
|
|
|
638 case LF:
|
|
58
|
639 r->header_start = p;
|
|
|
640 r->header_end = p;
|
|
28
|
641 goto done;
|
|
0
|
642 default:
|
|
28
|
643 r->header_start = p;
|
|
0
|
644 state = sw_value;
|
|
|
645 break;
|
|
|
646 }
|
|
|
647 break;
|
|
|
648
|
|
|
649 /* header value */
|
|
|
650 case sw_value:
|
|
|
651 switch (ch) {
|
|
|
652 case ' ':
|
|
28
|
653 r->header_end = p;
|
|
0
|
654 state = sw_space_after_value;
|
|
|
655 break;
|
|
|
656 case CR:
|
|
28
|
657 r->header_end = p;
|
|
0
|
658 state = sw_almost_done;
|
|
|
659 break;
|
|
|
660 case LF:
|
|
28
|
661 r->header_end = p;
|
|
|
662 goto done;
|
|
0
|
663 }
|
|
|
664 break;
|
|
|
665
|
|
|
666 /* space* before end of header line */
|
|
|
667 case sw_space_after_value:
|
|
|
668 switch (ch) {
|
|
|
669 case ' ':
|
|
|
670 break;
|
|
|
671 case CR:
|
|
|
672 state = sw_almost_done;
|
|
|
673 break;
|
|
|
674 case LF:
|
|
28
|
675 goto done;
|
|
0
|
676 default:
|
|
|
677 state = sw_value;
|
|
|
678 break;
|
|
|
679 }
|
|
|
680 break;
|
|
|
681
|
|
|
682 /* ignore header line */
|
|
|
683 case sw_ignore_line:
|
|
|
684 switch (ch) {
|
|
|
685 case LF:
|
|
|
686 state = sw_start;
|
|
|
687 break;
|
|
|
688 default:
|
|
|
689 break;
|
|
|
690 }
|
|
|
691 break;
|
|
|
692
|
|
|
693 /* end of header line */
|
|
|
694 case sw_almost_done:
|
|
|
695 switch (ch) {
|
|
172
|
696 case CR:
|
|
|
697 break;
|
|
0
|
698 case LF:
|
|
28
|
699 goto done;
|
|
0
|
700 default:
|
|
|
701 return NGX_HTTP_PARSE_INVALID_HEADER;
|
|
|
702 }
|
|
174
|
703 break;
|
|
0
|
704
|
|
|
705 /* end of header */
|
|
|
706 case sw_header_almost_done:
|
|
|
707 switch (ch) {
|
|
|
708 case LF:
|
|
28
|
709 goto header_done;
|
|
0
|
710 default:
|
|
|
711 return NGX_HTTP_PARSE_INVALID_HEADER;
|
|
|
712 }
|
|
|
713 }
|
|
|
714 }
|
|
|
715
|
|
|
716 b->pos = p;
|
|
28
|
717 r->state = state;
|
|
56
|
718 r->header_hash = hash;
|
|
0
|
719
|
|
28
|
720 return NGX_AGAIN;
|
|
|
721
|
|
|
722 done:
|
|
|
723
|
|
|
724 b->pos = p + 1;
|
|
|
725 r->state = sw_start;
|
|
56
|
726 r->header_hash = hash;
|
|
0
|
727
|
|
28
|
728 return NGX_OK;
|
|
|
729
|
|
|
730 header_done:
|
|
0
|
731
|
|
28
|
732 b->pos = p + 1;
|
|
|
733 r->state = sw_start;
|
|
|
734
|
|
|
735 return NGX_HTTP_PARSE_HEADER_DONE;
|
|
0
|
736 }
|
|
|
737
|
|
|
738
|
|
58
|
739 ngx_int_t
|
|
|
740 ngx_http_parse_complex_uri(ngx_http_request_t *r)
|
|
0
|
741 {
|
|
|
742 u_char c, ch, decoded, *p, *u;
|
|
|
743 enum {
|
|
|
744 sw_usual = 0,
|
|
|
745 sw_slash,
|
|
|
746 sw_dot,
|
|
|
747 sw_dot_dot,
|
|
10
|
748 #if (NGX_WIN32)
|
|
0
|
749 sw_dot_dot_dot,
|
|
|
750 #endif
|
|
|
751 sw_quoted,
|
|
|
752 sw_quoted_second
|
|
|
753 } state, quoted_state;
|
|
|
754
|
|
28
|
755 #if (NGX_SUPPRESS_WARN)
|
|
0
|
756 decoded = '\0';
|
|
|
757 quoted_state = sw_usual;
|
|
28
|
758 #endif
|
|
0
|
759
|
|
|
760 state = sw_usual;
|
|
|
761 p = r->uri_start;
|
|
|
762 u = r->uri.data;
|
|
|
763 r->uri_ext = NULL;
|
|
10
|
764 r->args_start = NULL;
|
|
0
|
765
|
|
|
766 ch = *p++;
|
|
|
767
|
|
28
|
768 while (p <= r->uri_end) {
|
|
10
|
769
|
|
|
770 /*
|
|
28
|
771 * we use "ch = *p++" inside the cycle, but this operation is safe,
|
|
10
|
772 * because after the URI there is always at least one charcter:
|
|
|
773 * the line feed
|
|
|
774 */
|
|
0
|
775
|
|
|
776 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
10
|
777 "s:%d in:'%Xd:%c', out:'%c'", state, ch, ch, *u);
|
|
0
|
778
|
|
|
779 switch (state) {
|
|
122
|
780
|
|
0
|
781 case sw_usual:
|
|
|
782 switch(ch) {
|
|
10
|
783 #if (NGX_WIN32)
|
|
|
784 case '\\':
|
|
|
785 r->uri_ext = NULL;
|
|
|
786
|
|
|
787 if (p == r->uri_start + r->uri.len) {
|
|
|
788
|
|
|
789 /*
|
|
|
790 * we omit the last "\" to cause redirect because
|
|
|
791 * the browsers do not treat "\" as "/" in relative URL path
|
|
|
792 */
|
|
|
793
|
|
|
794 break;
|
|
|
795 }
|
|
|
796
|
|
|
797 state = sw_slash;
|
|
|
798 *u++ = '/';
|
|
|
799 break;
|
|
|
800 #endif
|
|
0
|
801 case '/':
|
|
|
802 r->uri_ext = NULL;
|
|
|
803 state = sw_slash;
|
|
|
804 *u++ = ch;
|
|
|
805 break;
|
|
|
806 case '%':
|
|
|
807 quoted_state = state;
|
|
|
808 state = sw_quoted;
|
|
|
809 break;
|
|
10
|
810 case '?':
|
|
|
811 r->args_start = p;
|
|
28
|
812 goto done;
|
|
0
|
813 case '.':
|
|
|
814 r->uri_ext = u + 1;
|
|
22
|
815 *u++ = ch;
|
|
|
816 break;
|
|
0
|
817 default:
|
|
|
818 *u++ = ch;
|
|
|
819 break;
|
|
|
820 }
|
|
|
821 ch = *p++;
|
|
|
822 break;
|
|
|
823
|
|
|
824 case sw_slash:
|
|
|
825 switch(ch) {
|
|
10
|
826 #if (NGX_WIN32)
|
|
|
827 case '\\':
|
|
|
828 #endif
|
|
0
|
829 case '/':
|
|
|
830 break;
|
|
|
831 case '.':
|
|
|
832 state = sw_dot;
|
|
|
833 *u++ = ch;
|
|
|
834 break;
|
|
|
835 case '%':
|
|
|
836 quoted_state = state;
|
|
|
837 state = sw_quoted;
|
|
|
838 break;
|
|
28
|
839 case '?':
|
|
|
840 r->args_start = p;
|
|
|
841 goto done;
|
|
0
|
842 default:
|
|
|
843 state = sw_usual;
|
|
|
844 *u++ = ch;
|
|
|
845 break;
|
|
|
846 }
|
|
|
847 ch = *p++;
|
|
|
848 break;
|
|
|
849
|
|
|
850 case sw_dot:
|
|
|
851 switch(ch) {
|
|
10
|
852 #if (NGX_WIN32)
|
|
|
853 case '\\':
|
|
|
854 #endif
|
|
0
|
855 case '/':
|
|
|
856 state = sw_slash;
|
|
|
857 u--;
|
|
|
858 break;
|
|
|
859 case '.':
|
|
|
860 state = sw_dot_dot;
|
|
|
861 *u++ = ch;
|
|
|
862 break;
|
|
|
863 case '%':
|
|
|
864 quoted_state = state;
|
|
|
865 state = sw_quoted;
|
|
|
866 break;
|
|
28
|
867 case '?':
|
|
|
868 r->args_start = p;
|
|
|
869 goto done;
|
|
0
|
870 default:
|
|
|
871 state = sw_usual;
|
|
|
872 *u++ = ch;
|
|
|
873 break;
|
|
|
874 }
|
|
|
875 ch = *p++;
|
|
|
876 break;
|
|
|
877
|
|
|
878 case sw_dot_dot:
|
|
|
879 switch(ch) {
|
|
10
|
880 #if (NGX_WIN32)
|
|
|
881 case '\\':
|
|
|
882 #endif
|
|
0
|
883 case '/':
|
|
|
884 state = sw_slash;
|
|
|
885 u -= 4;
|
|
|
886 if (u < r->uri.data) {
|
|
|
887 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
888 }
|
|
|
889 while (*(u - 1) != '/') {
|
|
|
890 u--;
|
|
|
891 }
|
|
|
892 break;
|
|
|
893 case '%':
|
|
|
894 quoted_state = state;
|
|
|
895 state = sw_quoted;
|
|
|
896 break;
|
|
28
|
897 case '?':
|
|
|
898 r->args_start = p;
|
|
|
899 goto done;
|
|
10
|
900 #if (NGX_WIN32)
|
|
0
|
901 case '.':
|
|
|
902 state = sw_dot_dot_dot;
|
|
|
903 *u++ = ch;
|
|
|
904 break;
|
|
|
905 #endif
|
|
|
906 default:
|
|
|
907 state = sw_usual;
|
|
|
908 *u++ = ch;
|
|
|
909 break;
|
|
|
910 }
|
|
|
911 ch = *p++;
|
|
|
912 break;
|
|
|
913
|
|
10
|
914 #if (NGX_WIN32)
|
|
0
|
915 case sw_dot_dot_dot:
|
|
|
916 switch(ch) {
|
|
10
|
917 case '\\':
|
|
0
|
918 case '/':
|
|
|
919 state = sw_slash;
|
|
|
920 u -= 5;
|
|
|
921 if (u < r->uri.data) {
|
|
|
922 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
923 }
|
|
|
924 while (*u != '/') {
|
|
|
925 u--;
|
|
|
926 }
|
|
|
927 if (u < r->uri.data) {
|
|
|
928 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
929 }
|
|
|
930 while (*(u - 1) != '/') {
|
|
|
931 u--;
|
|
|
932 }
|
|
|
933 break;
|
|
|
934 case '%':
|
|
|
935 quoted_state = state;
|
|
|
936 state = sw_quoted;
|
|
|
937 break;
|
|
122
|
938 case '?':
|
|
|
939 r->args_start = p;
|
|
|
940 goto done;
|
|
0
|
941 default:
|
|
|
942 state = sw_usual;
|
|
|
943 *u++ = ch;
|
|
|
944 break;
|
|
|
945 }
|
|
|
946 ch = *p++;
|
|
|
947 break;
|
|
|
948 #endif
|
|
|
949
|
|
|
950 case sw_quoted:
|
|
|
951 if (ch >= '0' && ch <= '9') {
|
|
|
952 decoded = (u_char) (ch - '0');
|
|
|
953 state = sw_quoted_second;
|
|
|
954 ch = *p++;
|
|
|
955 break;
|
|
|
956 }
|
|
|
957
|
|
|
958 c = (u_char) (ch | 0x20);
|
|
|
959 if (c >= 'a' && c <= 'f') {
|
|
|
960 decoded = (u_char) (c - 'a' + 10);
|
|
|
961 state = sw_quoted_second;
|
|
|
962 ch = *p++;
|
|
|
963 break;
|
|
|
964 }
|
|
|
965
|
|
|
966 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
967
|
|
|
968 case sw_quoted_second:
|
|
|
969 if (ch >= '0' && ch <= '9') {
|
|
|
970 ch = (u_char) ((decoded << 4) + ch - '0');
|
|
38
|
971
|
|
0
|
972 if (ch == '%') {
|
|
|
973 state = sw_usual;
|
|
|
974 *u++ = ch;
|
|
|
975 ch = *p++;
|
|
|
976 break;
|
|
|
977 }
|
|
38
|
978
|
|
|
979 if (ch == '\0') {
|
|
|
980 r->zero_in_uri = 1;
|
|
|
981 *u++ = ch;
|
|
|
982 ch = *p++;
|
|
|
983 }
|
|
|
984
|
|
0
|
985 state = quoted_state;
|
|
|
986 break;
|
|
|
987 }
|
|
|
988
|
|
|
989 c = (u_char) (ch | 0x20);
|
|
|
990 if (c >= 'a' && c <= 'f') {
|
|
|
991 ch = (u_char) ((decoded << 4) + c - 'a' + 10);
|
|
28
|
992 if (ch == '?') {
|
|
0
|
993 *u++ = ch;
|
|
|
994 ch = *p++;
|
|
|
995 }
|
|
|
996 state = quoted_state;
|
|
|
997 break;
|
|
|
998 }
|
|
|
999
|
|
|
1000 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
1001 }
|
|
|
1002 }
|
|
|
1003
|
|
28
|
1004 done:
|
|
|
1005
|
|
0
|
1006 r->uri.len = u - r->uri.data;
|
|
|
1007 r->uri.data[r->uri.len] = '\0';
|
|
|
1008
|
|
|
1009 if (r->uri_ext) {
|
|
|
1010 r->exten.len = u - r->uri_ext;
|
|
10
|
1011 r->exten.data = r->uri_ext;
|
|
0
|
1012 }
|
|
|
1013
|
|
|
1014 r->uri_ext = NULL;
|
|
|
1015
|
|
|
1016 return NGX_OK;
|
|
|
1017 }
|
|
58
|
1018
|
|
|
1019
|
|
|
1020 ngx_int_t
|
|
122
|
1021 ngx_http_parse_unsafe_uri(ngx_http_request_t *r, ngx_str_t *uri,
|
|
|
1022 ngx_str_t *args, ngx_uint_t *flags)
|
|
|
1023 {
|
|
|
1024 u_char ch, *p;
|
|
|
1025 size_t len;
|
|
|
1026
|
|
|
1027 len = uri->len;
|
|
|
1028 p = uri->data;
|
|
|
1029
|
|
|
1030 if (len == 0 || p[0] == '?') {
|
|
|
1031 goto unsafe;
|
|
|
1032 }
|
|
|
1033
|
|
|
1034 if (p[0] == '.' && len == 3 && p[1] == '.' && (p[2] == '/'
|
|
|
1035 #if (NGX_WIN32)
|
|
|
1036 || p[2] == '\\'
|
|
|
1037 #endif
|
|
|
1038 ))
|
|
|
1039 {
|
|
|
1040 goto unsafe;
|
|
|
1041 }
|
|
|
1042
|
|
|
1043 for ( /* void */ ; len; len--) {
|
|
|
1044
|
|
|
1045 ch = *p++;
|
|
|
1046
|
|
|
1047 if (ch == '?') {
|
|
|
1048 args->len = len - 1;
|
|
|
1049 args->data = p;
|
|
|
1050 uri->len -= len;
|
|
|
1051
|
|
|
1052 return NGX_OK;
|
|
|
1053 }
|
|
|
1054
|
|
|
1055 if (ch == '\0') {
|
|
|
1056 *flags |= NGX_HTTP_ZERO_IN_URI;
|
|
|
1057 continue;
|
|
|
1058 }
|
|
|
1059
|
|
|
1060 if (ch != '/'
|
|
|
1061 #if (NGX_WIN32)
|
|
|
1062 && ch != '\\'
|
|
|
1063 #endif
|
|
|
1064 )
|
|
|
1065 {
|
|
|
1066 continue;
|
|
|
1067 }
|
|
|
1068
|
|
|
1069 if (len > 2) {
|
|
|
1070
|
|
|
1071 /* detect "/../" */
|
|
|
1072
|
|
124
|
1073 if (p[0] == '.' && p[1] == '.' && p[2] == '/') {
|
|
122
|
1074 goto unsafe;
|
|
|
1075 }
|
|
|
1076
|
|
|
1077 #if (NGX_WIN32)
|
|
|
1078
|
|
|
1079 if (p[2] == '\\') {
|
|
|
1080 goto unsafe;
|
|
|
1081 }
|
|
|
1082
|
|
|
1083 if (len > 3) {
|
|
|
1084
|
|
|
1085 /* detect "/.../" */
|
|
|
1086
|
|
124
|
1087 if (p[0] == '.' && p[1] == '.' && p[2] == '.'
|
|
|
1088 && (p[3] == '/' || p[3] == '\\'))
|
|
|
1089 {
|
|
122
|
1090 goto unsafe;
|
|
|
1091 }
|
|
|
1092 }
|
|
|
1093 #endif
|
|
|
1094 }
|
|
|
1095 }
|
|
|
1096
|
|
|
1097 return NGX_OK;
|
|
|
1098
|
|
|
1099 unsafe:
|
|
|
1100
|
|
|
1101 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
1102 "unsafe URI \"%V\" was detected", uri);
|
|
|
1103
|
|
|
1104 return NGX_ERROR;
|
|
|
1105 }
|
|
|
1106
|
|
|
1107
|
|
|
1108 ngx_int_t
|
|
58
|
1109 ngx_http_parse_multi_header_lines(ngx_array_t *headers, ngx_str_t *name,
|
|
|
1110 ngx_str_t *value)
|
|
|
1111 {
|
|
|
1112 ngx_uint_t i;
|
|
|
1113 u_char *start, *last, *end, ch;
|
|
|
1114 ngx_table_elt_t **h;
|
|
|
1115
|
|
|
1116 h = headers->elts;
|
|
|
1117
|
|
|
1118 for (i = 0; i < headers->nelts; i++) {
|
|
|
1119
|
|
|
1120 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, headers->pool->log, 0,
|
|
|
1121 "parse header: \"%V: %V\"", &h[i]->key, &h[i]->value);
|
|
|
1122
|
|
|
1123 if (name->len > h[i]->value.len) {
|
|
|
1124 continue;
|
|
|
1125 }
|
|
126
|
1126
|
|
58
|
1127 start = h[i]->value.data;
|
|
|
1128 end = h[i]->value.data + h[i]->value.len;
|
|
|
1129
|
|
|
1130 while (start < end) {
|
|
|
1131
|
|
|
1132 if (ngx_strncasecmp(start, name->data, name->len) != 0) {
|
|
|
1133 goto skip;
|
|
|
1134 }
|
|
|
1135
|
|
|
1136 for (start += name->len; start < end && *start == ' '; start++) {
|
|
|
1137 /* void */
|
|
|
1138 }
|
|
|
1139
|
|
|
1140 if (value == NULL) {
|
|
|
1141 if (start == end || *start == ',') {
|
|
|
1142 return i;
|
|
|
1143 }
|
|
|
1144
|
|
|
1145 goto skip;
|
|
|
1146 }
|
|
|
1147
|
|
|
1148 if (start == end || *start++ != '=') {
|
|
|
1149 /* the invalid header value */
|
|
|
1150 goto skip;
|
|
|
1151 }
|
|
|
1152
|
|
|
1153 while (start < end && *start == ' ') { start++; }
|
|
|
1154
|
|
|
1155 for (last = start; last < end && *last != ';'; last++) {
|
|
|
1156 /* void */
|
|
|
1157 }
|
|
|
1158
|
|
|
1159 value->len = last - start;
|
|
|
1160 value->data = start;
|
|
|
1161
|
|
|
1162 return i;
|
|
|
1163
|
|
|
1164 skip:
|
|
122
|
1165
|
|
58
|
1166 while (start < end) {
|
|
|
1167 ch = *start++;
|
|
|
1168 if (ch == ';' || ch == ',') {
|
|
|
1169 break;
|
|
|
1170 }
|
|
|
1171 }
|
|
|
1172
|
|
|
1173 while (start < end && *start == ' ') { start++; }
|
|
|
1174 }
|
|
|
1175 }
|
|
|
1176
|
|
|
1177 return NGX_DECLINED;
|
|
|
1178 }
|
