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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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198
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12 /* gcc, icc, msvc and others compile these switches as an jump table */
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13
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58
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14 ngx_int_t
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15 ngx_http_parse_request_line(ngx_http_request_t *r, ngx_buf_t *b)
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0
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16 {
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56
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17 u_char c, ch, *p, *m;
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0
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18 enum {
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19 sw_start = 0,
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20 sw_method,
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21 sw_space_after_method,
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22 sw_spaces_before_uri,
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23 sw_schema,
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24 sw_schema_slash,
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25 sw_schema_slash_slash,
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26 sw_host,
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27 sw_port,
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28 sw_after_slash_in_uri,
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29 sw_check_uri,
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30 sw_uri,
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31 sw_http_09,
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32 sw_http_H,
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33 sw_http_HT,
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34 sw_http_HTT,
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35 sw_http_HTTP,
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36 sw_first_major_digit,
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37 sw_major_digit,
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38 sw_first_minor_digit,
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39 sw_minor_digit,
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28
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40 sw_almost_done
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0
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41 } state;
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42
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43 state = r->state;
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44
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28
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45 for (p = b->pos; p < b->last; p++) {
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46 ch = *p;
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0
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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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188
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70 switch (p - m) {
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0
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71
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188
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72 case 3:
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0
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73 if (m[0] == 'G' && m[1] == 'E' && m[2] == 'T') {
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74 r->method = NGX_HTTP_GET;
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182
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75
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76 } else if (m[0] == 'P' && m[1] == 'U' && m[2] == 'T') {
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77 r->method = NGX_HTTP_PUT;
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0
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78 }
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188
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79 break;
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0
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80
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188
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81 case 4:
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0
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82 if (m[0] == 'P' && m[1] == 'O'
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28
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83 && m[2] == 'S' && m[3] == 'T')
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0
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84 {
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85 r->method = NGX_HTTP_POST;
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86
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87 } else if (m[0] == 'H' && m[1] == 'E'
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88 && m[2] == 'A' && m[3] == 'D')
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89 {
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90 r->method = NGX_HTTP_HEAD;
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91 }
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188
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92 break;
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182
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93
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188
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94 case 5:
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186
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95 if (m[0] == 'M' && m[1] == 'K'
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96 && m[2] == 'C' && m[3] == 'O' && m[4] == 'L')
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97 {
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98 r->method = NGX_HTTP_MKCOL;
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99 }
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188
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100 break;
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186
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101
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188
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102 case 6:
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182
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103 if (m[0] == 'D' && m[1] == 'E' && m[2] == 'L'
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104 && m[3] == 'E' && m[4] == 'T' && m[5] == 'E')
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105 {
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106 r->method = NGX_HTTP_DELETE;
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107 }
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188
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108 break;
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0
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109 }
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110
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111 state = sw_spaces_before_uri;
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112 break;
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113 }
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114
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115 if (ch < 'A' || ch > 'Z') {
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116 return NGX_HTTP_PARSE_INVALID_METHOD;
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117 }
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118
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119 break;
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120
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121 /* single space after method */
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122 case sw_space_after_method:
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123 switch (ch) {
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124 case ' ':
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125 state = sw_spaces_before_uri;
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126 break;
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127 default:
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128 return NGX_HTTP_PARSE_INVALID_METHOD;
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129 }
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130 break;
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131
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132 /* space* before URI */
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133 case sw_spaces_before_uri:
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56
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134
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135 c = (u_char) (ch | 0x20);
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70
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136 if (c >= 'a' && c <= 'z') {
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38
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137 r->schema_start = p;
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138 state = sw_schema;
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139 break;
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140 }
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141
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0
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142 switch (ch) {
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143 case '/':
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28
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144 r->uri_start = p;
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0
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145 state = sw_after_slash_in_uri;
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146 break;
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147 case ' ':
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148 break;
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149 default:
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150 return NGX_HTTP_PARSE_INVALID_REQUEST;
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151 }
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152 break;
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153
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154 case sw_schema:
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56
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155
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156 c = (u_char) (ch | 0x20);
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70
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157 if (c >= 'a' && c <= 'z') {
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38
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158 break;
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159 }
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160
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0
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161 switch (ch) {
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162 case ':':
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28
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163 r->schema_end = p;
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0
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164 state = sw_schema_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:
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172 switch (ch) {
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173 case '/':
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174 state = sw_schema_slash_slash;
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175 break;
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176 default:
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177 return NGX_HTTP_PARSE_INVALID_REQUEST;
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178 }
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179 break;
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180
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181 case sw_schema_slash_slash:
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182 switch (ch) {
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183 case '/':
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28
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184 r->host_start = p;
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0
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185 state = sw_host;
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186 break;
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187 default:
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188 return NGX_HTTP_PARSE_INVALID_REQUEST;
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189 }
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190 break;
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191
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192 case sw_host:
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56
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193
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194 c = (u_char) (ch | 0x20);
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70
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195 if (c >= 'a' && c <= 'z') {
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56
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196 break;
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197 }
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198
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199 if ((ch >= '0' && ch <= '9') || ch == '.' || ch == '-')
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38
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200 {
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201 break;
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202 }
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203
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0
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204 switch (ch) {
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205 case ':':
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28
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206 r->host_end = p;
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0
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207 state = sw_port;
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208 break;
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209 case '/':
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28
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210 r->host_end = p;
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211 r->uri_start = p;
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0
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212 state = sw_after_slash_in_uri;
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213 break;
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214 default:
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215 return NGX_HTTP_PARSE_INVALID_REQUEST;
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216 }
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217 break;
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218
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219 case sw_port:
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38
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220 if (ch >= '0' && ch <= '9') {
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221 break;
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222 }
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223
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0
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224 switch (ch) {
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225 case '/':
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28
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226 r->port_end = p;
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227 r->uri_start = p;
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0
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228 state = sw_after_slash_in_uri;
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229 break;
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230 default:
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38
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231 return NGX_HTTP_PARSE_INVALID_REQUEST;
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0
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232 }
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233 break;
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234
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10
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235 /* check "/.", "//", "%", and "\" (Win32) in URI */
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0
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236 case sw_after_slash_in_uri:
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38
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237
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56
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238 c = (u_char) (ch | 0x20);
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70
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239 if (c >= 'a' && c <= 'z') {
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56
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240 state = sw_check_uri;
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241 break;
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242 }
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243
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244 if (ch >= '0' && ch <= '9') {
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38
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245 state = sw_check_uri;
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246 break;
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247 }
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248
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0
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249 switch (ch) {
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38
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250 case ' ':
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251 r->uri_end = p;
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252 state = sw_http_09;
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253 break;
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0
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254 case CR:
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28
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255 r->uri_end = p;
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0
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256 r->http_minor = 9;
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257 state = sw_almost_done;
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258 break;
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259 case LF:
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28
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260 r->uri_end = p;
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0
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261 r->http_minor = 9;
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28
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262 goto done;
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0
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263 case '.':
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2
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264 r->complex_uri = 1;
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265 state = sw_uri;
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266 break;
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0
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267 case '%':
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2
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268 r->quoted_uri = 1;
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0
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269 state = sw_uri;
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270 break;
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38
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271 case '/':
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272 r->complex_uri = 1;
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273 state = sw_uri;
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274 break;
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10
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275 #if (NGX_WIN32)
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276 case '\\':
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277 r->complex_uri = 1;
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38
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278 state = sw_uri;
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10
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279 break;
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280 #endif
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38
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281 case '?':
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282 r->args_start = p + 1;
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283 state = sw_uri;
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0
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284 break;
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34
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285 case '+':
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286 r->plus_in_uri = 1;
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287 break;
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38
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288 case '\0':
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289 r->zero_in_uri = 1;
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0
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290 break;
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291 default:
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292 state = sw_check_uri;
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293 break;
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294 }
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295 break;
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296
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10
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297 /* check "/", "%" and "\" (Win32) in URI */
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0
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298 case sw_check_uri:
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38
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299
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56
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300 c = (u_char) (ch | 0x20);
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70
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301 if (c >= 'a' && c <= 'z') {
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56
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302 break;
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303 }
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304
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305 if (ch >= '0' && ch <= '9') {
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38
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306 break;
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307 }
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308
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0
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309 switch (ch) {
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38
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310 case '/':
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311 r->uri_ext = NULL;
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312 state = sw_after_slash_in_uri;
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313 break;
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314 case '.':
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315 r->uri_ext = p + 1;
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316 break;
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317 case ' ':
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318 r->uri_end = p;
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319 state = sw_http_09;
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320 break;
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0
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321 case CR:
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28
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322 r->uri_end = p;
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0
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323 r->http_minor = 9;
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324 state = sw_almost_done;
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325 break;
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326 case LF:
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28
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327 r->uri_end = p;
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0
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328 r->http_minor = 9;
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28
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329 goto done;
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10
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330 #if (NGX_WIN32)
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331 case '\\':
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332 r->complex_uri = 1;
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333 state = sw_after_slash_in_uri;
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334 break;
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335 #endif
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38
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336 case '%':
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337 r->quoted_uri = 1;
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338 state = sw_uri;
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0
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339 break;
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340 case '?':
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28
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341 r->args_start = p + 1;
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0
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342 state = sw_uri;
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343 break;
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206
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344 case '+':
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345 r->plus_in_uri = 1;
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346 break;
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38
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347 case '\0':
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348 r->zero_in_uri = 1;
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349 break;
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0
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350 }
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351 break;
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352
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353 /* URI */
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354 case sw_uri:
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355 switch (ch) {
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38
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356 case ' ':
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357 r->uri_end = p;
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358 state = sw_http_09;
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359 break;
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0
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360 case CR:
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28
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361 r->uri_end = p;
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0
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362 r->http_minor = 9;
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363 state = sw_almost_done;
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364 break;
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365 case LF:
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28
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366 r->uri_end = p;
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0
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367 r->http_minor = 9;
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28
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368 goto done;
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38
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369 case '\0':
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370 r->zero_in_uri = 1;
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0
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371 break;
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372 }
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373 break;
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374
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375 /* space+ after URI */
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376 case sw_http_09:
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377 switch (ch) {
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378 case ' ':
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379 break;
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380 case CR:
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381 r->http_minor = 9;
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382 state = sw_almost_done;
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383 break;
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384 case LF:
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385 r->http_minor = 9;
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28
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386 goto done;
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0
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387 case 'H':
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28
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388 r->http_protocol.data = p;
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0
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389 state = sw_http_H;
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390 break;
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391 default:
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392 return NGX_HTTP_PARSE_INVALID_REQUEST;
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393 }
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394 break;
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395
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396 case sw_http_H:
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397 switch (ch) {
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398 case 'T':
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399 state = sw_http_HT;
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400 break;
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401 default:
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402 return NGX_HTTP_PARSE_INVALID_REQUEST;
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403 }
|
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404 break;
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405
|
|
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406 case sw_http_HT:
|
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407 switch (ch) {
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408 case 'T':
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409 state = sw_http_HTT;
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410 break;
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411 default:
|
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412 return NGX_HTTP_PARSE_INVALID_REQUEST;
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413 }
|
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414 break;
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415
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|
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416 case sw_http_HTT:
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417 switch (ch) {
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418 case 'P':
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419 state = sw_http_HTTP;
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420 break;
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421 default:
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422 return NGX_HTTP_PARSE_INVALID_REQUEST;
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423 }
|
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424 break;
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425
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|
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426 case sw_http_HTTP:
|
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427 switch (ch) {
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428 case '/':
|
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429 state = sw_first_major_digit;
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430 break;
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431 default:
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432 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
433 }
|
|
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434 break;
|
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435
|
|
|
436 /* first digit of major HTTP version */
|
|
|
437 case sw_first_major_digit:
|
|
|
438 if (ch < '1' || ch > '9') {
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|
|
439 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
440 }
|
|
|
441
|
|
|
442 r->http_major = ch - '0';
|
|
|
443 state = sw_major_digit;
|
|
|
444 break;
|
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445
|
|
|
446 /* major HTTP version or dot */
|
|
|
447 case sw_major_digit:
|
|
|
448 if (ch == '.') {
|
|
|
449 state = sw_first_minor_digit;
|
|
|
450 break;
|
|
|
451 }
|
|
|
452
|
|
|
453 if (ch < '0' || ch > '9') {
|
|
|
454 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
455 }
|
|
|
456
|
|
|
457 r->http_major = r->http_major * 10 + ch - '0';
|
|
|
458 break;
|
|
|
459
|
|
|
460 /* first digit of minor HTTP version */
|
|
|
461 case sw_first_minor_digit:
|
|
|
462 if (ch < '0' || ch > '9') {
|
|
|
463 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
464 }
|
|
|
465
|
|
|
466 r->http_minor = ch - '0';
|
|
|
467 state = sw_minor_digit;
|
|
|
468 break;
|
|
|
469
|
|
|
470 /* minor HTTP version or end of request line */
|
|
|
471 case sw_minor_digit:
|
|
|
472 if (ch == CR) {
|
|
|
473 state = sw_almost_done;
|
|
|
474 break;
|
|
|
475 }
|
|
|
476
|
|
|
477 if (ch == LF) {
|
|
28
|
478 goto done;
|
|
0
|
479 }
|
|
|
480
|
|
|
481 if (ch < '0' || ch > '9') {
|
|
|
482 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
483 }
|
|
|
484
|
|
|
485 r->http_minor = r->http_minor * 10 + ch - '0';
|
|
|
486 break;
|
|
|
487
|
|
|
488 /* end of request line */
|
|
|
489 case sw_almost_done:
|
|
28
|
490 r->request_end = p - 1;
|
|
0
|
491 switch (ch) {
|
|
|
492 case LF:
|
|
28
|
493 goto done;
|
|
0
|
494 default:
|
|
|
495 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
496 }
|
|
|
497 }
|
|
|
498 }
|
|
|
499
|
|
|
500 b->pos = p;
|
|
28
|
501 r->state = state;
|
|
0
|
502
|
|
28
|
503 return NGX_AGAIN;
|
|
0
|
504
|
|
28
|
505 done:
|
|
|
506
|
|
|
507 b->pos = p + 1;
|
|
0
|
508
|
|
28
|
509 if (r->request_end == NULL) {
|
|
|
510 r->request_end = p;
|
|
|
511 }
|
|
0
|
512
|
|
28
|
513 r->http_version = r->http_major * 1000 + r->http_minor;
|
|
|
514 r->state = sw_start;
|
|
0
|
515
|
|
28
|
516 if (r->http_version == 9 && r->method != NGX_HTTP_GET) {
|
|
|
517 return NGX_HTTP_PARSE_INVALID_09_METHOD;
|
|
0
|
518 }
|
|
28
|
519
|
|
|
520 return NGX_OK;
|
|
0
|
521 }
|
|
|
522
|
|
|
523
|
|
58
|
524 ngx_int_t
|
|
|
525 ngx_http_parse_header_line(ngx_http_request_t *r, ngx_buf_t *b)
|
|
0
|
526 {
|
|
56
|
527 u_char c, ch, *p;
|
|
198
|
528 ngx_uint_t hash, i;
|
|
0
|
529 enum {
|
|
|
530 sw_start = 0,
|
|
|
531 sw_name,
|
|
|
532 sw_space_before_value,
|
|
|
533 sw_value,
|
|
|
534 sw_space_after_value,
|
|
52
|
535 sw_ignore_line,
|
|
0
|
536 sw_almost_done,
|
|
52
|
537 sw_header_almost_done
|
|
0
|
538 } state;
|
|
|
539
|
|
250
|
540 /* the last '\0' is not needed because string is zero terminated */
|
|
|
541
|
|
198
|
542 static u_char lowcase[] =
|
|
|
543 "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
|
|
|
544 "\0\0\0\0\0\0\0\0\0\0\0\0\0-\0\0" "0123456789\0\0\0\0\0\0"
|
|
|
545 "\0abcdefghijklmnopqrstuvwxyz\0\0\0\0\0"
|
|
|
546 "\0abcdefghijklmnopqrstuvwxyz\0\0\0\0\0"
|
|
|
547 "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
|
|
|
548 "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
|
|
|
549 "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
|
|
|
550 "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0";
|
|
|
551
|
|
0
|
552 state = r->state;
|
|
56
|
553 hash = r->header_hash;
|
|
198
|
554 i = r->lowcase_index;
|
|
0
|
555
|
|
28
|
556 for (p = b->pos; p < b->last; p++) {
|
|
|
557 ch = *p;
|
|
0
|
558
|
|
|
559 switch (state) {
|
|
|
560
|
|
|
561 /* first char */
|
|
|
562 case sw_start:
|
|
60
|
563 r->invalid_header = 0;
|
|
|
564
|
|
0
|
565 switch (ch) {
|
|
|
566 case CR:
|
|
28
|
567 r->header_end = p;
|
|
0
|
568 state = sw_header_almost_done;
|
|
|
569 break;
|
|
|
570 case LF:
|
|
28
|
571 r->header_end = p;
|
|
|
572 goto header_done;
|
|
0
|
573 default:
|
|
|
574 state = sw_name;
|
|
28
|
575 r->header_name_start = p;
|
|
0
|
576
|
|
198
|
577 c = lowcase[ch];
|
|
0
|
578
|
|
198
|
579 if (c) {
|
|
|
580 hash = ngx_hash(0, c);
|
|
|
581 r->lowcase_header[0] = c;
|
|
|
582 i = 1;
|
|
0
|
583 break;
|
|
|
584 }
|
|
|
585
|
|
60
|
586 r->invalid_header = 1;
|
|
|
587
|
|
52
|
588 break;
|
|
0
|
589
|
|
|
590 }
|
|
|
591 break;
|
|
|
592
|
|
|
593 /* header name */
|
|
|
594 case sw_name:
|
|
198
|
595 c = lowcase[ch];
|
|
|
596
|
|
|
597 if (c) {
|
|
|
598 hash = ngx_hash(hash, c);
|
|
|
599 r->lowcase_header[i++] = c;
|
|
|
600 i &= ~NGX_HTTP_LC_HEADER_LEN;
|
|
0
|
601 break;
|
|
|
602 }
|
|
|
603
|
|
|
604 if (ch == ':') {
|
|
28
|
605 r->header_name_end = p;
|
|
0
|
606 state = sw_space_before_value;
|
|
|
607 break;
|
|
|
608 }
|
|
|
609
|
|
58
|
610 if (ch == CR) {
|
|
|
611 r->header_name_end = p;
|
|
|
612 r->header_start = p;
|
|
|
613 r->header_end = p;
|
|
|
614 state = sw_almost_done;
|
|
|
615 break;
|
|
|
616 }
|
|
|
617
|
|
|
618 if (ch == LF) {
|
|
|
619 r->header_name_end = p;
|
|
|
620 r->header_start = p;
|
|
|
621 r->header_end = p;
|
|
|
622 goto done;
|
|
|
623 }
|
|
|
624
|
|
2
|
625 /* IIS may send the duplicate "HTTP/1.1 ..." lines */
|
|
0
|
626 if (ch == '/'
|
|
58
|
627 && r->upstream
|
|
|
628 && p - r->header_name_start == 4
|
|
|
629 && ngx_strncmp(r->header_name_start, "HTTP", 4) == 0)
|
|
0
|
630 {
|
|
|
631 state = sw_ignore_line;
|
|
|
632 break;
|
|
|
633 }
|
|
|
634
|
|
60
|
635 r->invalid_header = 1;
|
|
|
636
|
|
52
|
637 break;
|
|
0
|
638
|
|
|
639 /* space* before header value */
|
|
|
640 case sw_space_before_value:
|
|
|
641 switch (ch) {
|
|
|
642 case ' ':
|
|
|
643 break;
|
|
|
644 case CR:
|
|
58
|
645 r->header_start = p;
|
|
|
646 r->header_end = p;
|
|
0
|
647 state = sw_almost_done;
|
|
|
648 break;
|
|
|
649 case LF:
|
|
58
|
650 r->header_start = p;
|
|
|
651 r->header_end = p;
|
|
28
|
652 goto done;
|
|
0
|
653 default:
|
|
28
|
654 r->header_start = p;
|
|
0
|
655 state = sw_value;
|
|
|
656 break;
|
|
|
657 }
|
|
|
658 break;
|
|
|
659
|
|
|
660 /* header value */
|
|
|
661 case sw_value:
|
|
|
662 switch (ch) {
|
|
|
663 case ' ':
|
|
28
|
664 r->header_end = p;
|
|
0
|
665 state = sw_space_after_value;
|
|
|
666 break;
|
|
|
667 case CR:
|
|
28
|
668 r->header_end = p;
|
|
0
|
669 state = sw_almost_done;
|
|
|
670 break;
|
|
|
671 case LF:
|
|
28
|
672 r->header_end = p;
|
|
|
673 goto done;
|
|
0
|
674 }
|
|
|
675 break;
|
|
|
676
|
|
|
677 /* space* before end of header line */
|
|
|
678 case sw_space_after_value:
|
|
|
679 switch (ch) {
|
|
|
680 case ' ':
|
|
|
681 break;
|
|
|
682 case CR:
|
|
|
683 state = sw_almost_done;
|
|
|
684 break;
|
|
|
685 case LF:
|
|
28
|
686 goto done;
|
|
0
|
687 default:
|
|
|
688 state = sw_value;
|
|
|
689 break;
|
|
|
690 }
|
|
|
691 break;
|
|
|
692
|
|
|
693 /* ignore header line */
|
|
|
694 case sw_ignore_line:
|
|
|
695 switch (ch) {
|
|
|
696 case LF:
|
|
|
697 state = sw_start;
|
|
|
698 break;
|
|
|
699 default:
|
|
|
700 break;
|
|
|
701 }
|
|
|
702 break;
|
|
|
703
|
|
|
704 /* end of header line */
|
|
|
705 case sw_almost_done:
|
|
|
706 switch (ch) {
|
|
172
|
707 case CR:
|
|
|
708 break;
|
|
0
|
709 case LF:
|
|
28
|
710 goto done;
|
|
0
|
711 default:
|
|
|
712 return NGX_HTTP_PARSE_INVALID_HEADER;
|
|
|
713 }
|
|
174
|
714 break;
|
|
0
|
715
|
|
|
716 /* end of header */
|
|
|
717 case sw_header_almost_done:
|
|
|
718 switch (ch) {
|
|
|
719 case LF:
|
|
28
|
720 goto header_done;
|
|
0
|
721 default:
|
|
|
722 return NGX_HTTP_PARSE_INVALID_HEADER;
|
|
|
723 }
|
|
|
724 }
|
|
|
725 }
|
|
|
726
|
|
|
727 b->pos = p;
|
|
28
|
728 r->state = state;
|
|
56
|
729 r->header_hash = hash;
|
|
198
|
730 r->lowcase_index = i;
|
|
0
|
731
|
|
28
|
732 return NGX_AGAIN;
|
|
|
733
|
|
|
734 done:
|
|
|
735
|
|
|
736 b->pos = p + 1;
|
|
|
737 r->state = sw_start;
|
|
56
|
738 r->header_hash = hash;
|
|
198
|
739 r->lowcase_index = i;
|
|
0
|
740
|
|
28
|
741 return NGX_OK;
|
|
|
742
|
|
|
743 header_done:
|
|
0
|
744
|
|
28
|
745 b->pos = p + 1;
|
|
|
746 r->state = sw_start;
|
|
|
747
|
|
|
748 return NGX_HTTP_PARSE_HEADER_DONE;
|
|
0
|
749 }
|
|
|
750
|
|
|
751
|
|
58
|
752 ngx_int_t
|
|
|
753 ngx_http_parse_complex_uri(ngx_http_request_t *r)
|
|
0
|
754 {
|
|
|
755 u_char c, ch, decoded, *p, *u;
|
|
|
756 enum {
|
|
|
757 sw_usual = 0,
|
|
|
758 sw_slash,
|
|
|
759 sw_dot,
|
|
|
760 sw_dot_dot,
|
|
10
|
761 #if (NGX_WIN32)
|
|
0
|
762 sw_dot_dot_dot,
|
|
|
763 #endif
|
|
|
764 sw_quoted,
|
|
|
765 sw_quoted_second
|
|
|
766 } state, quoted_state;
|
|
|
767
|
|
28
|
768 #if (NGX_SUPPRESS_WARN)
|
|
0
|
769 decoded = '\0';
|
|
|
770 quoted_state = sw_usual;
|
|
28
|
771 #endif
|
|
0
|
772
|
|
|
773 state = sw_usual;
|
|
|
774 p = r->uri_start;
|
|
|
775 u = r->uri.data;
|
|
|
776 r->uri_ext = NULL;
|
|
10
|
777 r->args_start = NULL;
|
|
0
|
778
|
|
|
779 ch = *p++;
|
|
|
780
|
|
28
|
781 while (p <= r->uri_end) {
|
|
10
|
782
|
|
|
783 /*
|
|
28
|
784 * we use "ch = *p++" inside the cycle, but this operation is safe,
|
|
10
|
785 * because after the URI there is always at least one charcter:
|
|
|
786 * the line feed
|
|
|
787 */
|
|
0
|
788
|
|
|
789 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
10
|
790 "s:%d in:'%Xd:%c', out:'%c'", state, ch, ch, *u);
|
|
0
|
791
|
|
|
792 switch (state) {
|
|
122
|
793
|
|
0
|
794 case sw_usual:
|
|
|
795 switch(ch) {
|
|
10
|
796 #if (NGX_WIN32)
|
|
|
797 case '\\':
|
|
|
798 r->uri_ext = NULL;
|
|
|
799
|
|
|
800 if (p == r->uri_start + r->uri.len) {
|
|
|
801
|
|
|
802 /*
|
|
|
803 * we omit the last "\" to cause redirect because
|
|
|
804 * the browsers do not treat "\" as "/" in relative URL path
|
|
|
805 */
|
|
|
806
|
|
|
807 break;
|
|
|
808 }
|
|
|
809
|
|
|
810 state = sw_slash;
|
|
|
811 *u++ = '/';
|
|
|
812 break;
|
|
|
813 #endif
|
|
0
|
814 case '/':
|
|
|
815 r->uri_ext = NULL;
|
|
|
816 state = sw_slash;
|
|
|
817 *u++ = ch;
|
|
|
818 break;
|
|
|
819 case '%':
|
|
|
820 quoted_state = state;
|
|
|
821 state = sw_quoted;
|
|
|
822 break;
|
|
10
|
823 case '?':
|
|
|
824 r->args_start = p;
|
|
28
|
825 goto done;
|
|
0
|
826 case '.':
|
|
|
827 r->uri_ext = u + 1;
|
|
22
|
828 *u++ = ch;
|
|
|
829 break;
|
|
206
|
830 case '+':
|
|
|
831 r->plus_in_uri = 1;
|
|
0
|
832 default:
|
|
|
833 *u++ = ch;
|
|
|
834 break;
|
|
|
835 }
|
|
|
836 ch = *p++;
|
|
|
837 break;
|
|
|
838
|
|
|
839 case sw_slash:
|
|
|
840 switch(ch) {
|
|
10
|
841 #if (NGX_WIN32)
|
|
|
842 case '\\':
|
|
|
843 #endif
|
|
0
|
844 case '/':
|
|
|
845 break;
|
|
|
846 case '.':
|
|
|
847 state = sw_dot;
|
|
|
848 *u++ = ch;
|
|
|
849 break;
|
|
|
850 case '%':
|
|
|
851 quoted_state = state;
|
|
|
852 state = sw_quoted;
|
|
|
853 break;
|
|
28
|
854 case '?':
|
|
|
855 r->args_start = p;
|
|
|
856 goto done;
|
|
206
|
857 case '+':
|
|
|
858 r->plus_in_uri = 1;
|
|
0
|
859 default:
|
|
|
860 state = sw_usual;
|
|
|
861 *u++ = ch;
|
|
|
862 break;
|
|
|
863 }
|
|
|
864 ch = *p++;
|
|
|
865 break;
|
|
|
866
|
|
|
867 case sw_dot:
|
|
|
868 switch(ch) {
|
|
10
|
869 #if (NGX_WIN32)
|
|
|
870 case '\\':
|
|
|
871 #endif
|
|
0
|
872 case '/':
|
|
|
873 state = sw_slash;
|
|
|
874 u--;
|
|
|
875 break;
|
|
|
876 case '.':
|
|
|
877 state = sw_dot_dot;
|
|
|
878 *u++ = ch;
|
|
|
879 break;
|
|
|
880 case '%':
|
|
|
881 quoted_state = state;
|
|
|
882 state = sw_quoted;
|
|
|
883 break;
|
|
28
|
884 case '?':
|
|
|
885 r->args_start = p;
|
|
|
886 goto done;
|
|
206
|
887 case '+':
|
|
|
888 r->plus_in_uri = 1;
|
|
0
|
889 default:
|
|
|
890 state = sw_usual;
|
|
|
891 *u++ = ch;
|
|
|
892 break;
|
|
|
893 }
|
|
|
894 ch = *p++;
|
|
|
895 break;
|
|
|
896
|
|
|
897 case sw_dot_dot:
|
|
|
898 switch(ch) {
|
|
10
|
899 #if (NGX_WIN32)
|
|
|
900 case '\\':
|
|
|
901 #endif
|
|
0
|
902 case '/':
|
|
|
903 state = sw_slash;
|
|
|
904 u -= 4;
|
|
|
905 if (u < r->uri.data) {
|
|
|
906 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
907 }
|
|
|
908 while (*(u - 1) != '/') {
|
|
|
909 u--;
|
|
|
910 }
|
|
|
911 break;
|
|
|
912 case '%':
|
|
|
913 quoted_state = state;
|
|
|
914 state = sw_quoted;
|
|
|
915 break;
|
|
28
|
916 case '?':
|
|
|
917 r->args_start = p;
|
|
|
918 goto done;
|
|
10
|
919 #if (NGX_WIN32)
|
|
0
|
920 case '.':
|
|
|
921 state = sw_dot_dot_dot;
|
|
|
922 *u++ = ch;
|
|
|
923 break;
|
|
|
924 #endif
|
|
206
|
925 case '+':
|
|
|
926 r->plus_in_uri = 1;
|
|
0
|
927 default:
|
|
|
928 state = sw_usual;
|
|
|
929 *u++ = ch;
|
|
|
930 break;
|
|
|
931 }
|
|
|
932 ch = *p++;
|
|
|
933 break;
|
|
|
934
|
|
10
|
935 #if (NGX_WIN32)
|
|
0
|
936 case sw_dot_dot_dot:
|
|
|
937 switch(ch) {
|
|
10
|
938 case '\\':
|
|
0
|
939 case '/':
|
|
|
940 state = sw_slash;
|
|
|
941 u -= 5;
|
|
|
942 if (u < r->uri.data) {
|
|
|
943 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
944 }
|
|
|
945 while (*u != '/') {
|
|
|
946 u--;
|
|
|
947 }
|
|
|
948 if (u < r->uri.data) {
|
|
|
949 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
950 }
|
|
|
951 while (*(u - 1) != '/') {
|
|
|
952 u--;
|
|
|
953 }
|
|
|
954 break;
|
|
|
955 case '%':
|
|
|
956 quoted_state = state;
|
|
|
957 state = sw_quoted;
|
|
|
958 break;
|
|
122
|
959 case '?':
|
|
|
960 r->args_start = p;
|
|
|
961 goto done;
|
|
206
|
962 case '+':
|
|
|
963 r->plus_in_uri = 1;
|
|
0
|
964 default:
|
|
|
965 state = sw_usual;
|
|
|
966 *u++ = ch;
|
|
|
967 break;
|
|
|
968 }
|
|
|
969 ch = *p++;
|
|
|
970 break;
|
|
|
971 #endif
|
|
|
972
|
|
|
973 case sw_quoted:
|
|
216
|
974 r->quoted_uri = 1;
|
|
|
975
|
|
0
|
976 if (ch >= '0' && ch <= '9') {
|
|
|
977 decoded = (u_char) (ch - '0');
|
|
|
978 state = sw_quoted_second;
|
|
|
979 ch = *p++;
|
|
|
980 break;
|
|
|
981 }
|
|
|
982
|
|
|
983 c = (u_char) (ch | 0x20);
|
|
|
984 if (c >= 'a' && c <= 'f') {
|
|
|
985 decoded = (u_char) (c - 'a' + 10);
|
|
|
986 state = sw_quoted_second;
|
|
|
987 ch = *p++;
|
|
|
988 break;
|
|
|
989 }
|
|
|
990
|
|
|
991 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
992
|
|
|
993 case sw_quoted_second:
|
|
|
994 if (ch >= '0' && ch <= '9') {
|
|
|
995 ch = (u_char) ((decoded << 4) + ch - '0');
|
|
38
|
996
|
|
0
|
997 if (ch == '%') {
|
|
|
998 state = sw_usual;
|
|
|
999 *u++ = ch;
|
|
|
1000 ch = *p++;
|
|
|
1001 break;
|
|
|
1002 }
|
|
38
|
1003
|
|
|
1004 if (ch == '\0') {
|
|
|
1005 r->zero_in_uri = 1;
|
|
|
1006 }
|
|
|
1007
|
|
0
|
1008 state = quoted_state;
|
|
|
1009 break;
|
|
|
1010 }
|
|
|
1011
|
|
|
1012 c = (u_char) (ch | 0x20);
|
|
|
1013 if (c >= 'a' && c <= 'f') {
|
|
|
1014 ch = (u_char) ((decoded << 4) + c - 'a' + 10);
|
|
206
|
1015
|
|
28
|
1016 if (ch == '?') {
|
|
0
|
1017 *u++ = ch;
|
|
|
1018 ch = *p++;
|
|
206
|
1019
|
|
|
1020 } else if (ch == '+') {
|
|
|
1021 r->plus_in_uri = 1;
|
|
0
|
1022 }
|
|
206
|
1023
|
|
0
|
1024 state = quoted_state;
|
|
|
1025 break;
|
|
|
1026 }
|
|
|
1027
|
|
|
1028 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
1029 }
|
|
|
1030 }
|
|
|
1031
|
|
28
|
1032 done:
|
|
|
1033
|
|
0
|
1034 r->uri.len = u - r->uri.data;
|
|
|
1035 r->uri.data[r->uri.len] = '\0';
|
|
|
1036
|
|
|
1037 if (r->uri_ext) {
|
|
|
1038 r->exten.len = u - r->uri_ext;
|
|
10
|
1039 r->exten.data = r->uri_ext;
|
|
0
|
1040 }
|
|
|
1041
|
|
|
1042 r->uri_ext = NULL;
|
|
|
1043
|
|
|
1044 return NGX_OK;
|
|
|
1045 }
|
|
58
|
1046
|
|
|
1047
|
|
|
1048 ngx_int_t
|
|
122
|
1049 ngx_http_parse_unsafe_uri(ngx_http_request_t *r, ngx_str_t *uri,
|
|
|
1050 ngx_str_t *args, ngx_uint_t *flags)
|
|
|
1051 {
|
|
|
1052 u_char ch, *p;
|
|
|
1053 size_t len;
|
|
|
1054
|
|
|
1055 len = uri->len;
|
|
|
1056 p = uri->data;
|
|
|
1057
|
|
|
1058 if (len == 0 || p[0] == '?') {
|
|
|
1059 goto unsafe;
|
|
|
1060 }
|
|
|
1061
|
|
|
1062 if (p[0] == '.' && len == 3 && p[1] == '.' && (p[2] == '/'
|
|
|
1063 #if (NGX_WIN32)
|
|
|
1064 || p[2] == '\\'
|
|
|
1065 #endif
|
|
|
1066 ))
|
|
|
1067 {
|
|
|
1068 goto unsafe;
|
|
|
1069 }
|
|
|
1070
|
|
|
1071 for ( /* void */ ; len; len--) {
|
|
|
1072
|
|
|
1073 ch = *p++;
|
|
|
1074
|
|
|
1075 if (ch == '?') {
|
|
|
1076 args->len = len - 1;
|
|
|
1077 args->data = p;
|
|
|
1078 uri->len -= len;
|
|
|
1079
|
|
|
1080 return NGX_OK;
|
|
|
1081 }
|
|
|
1082
|
|
|
1083 if (ch == '\0') {
|
|
|
1084 *flags |= NGX_HTTP_ZERO_IN_URI;
|
|
|
1085 continue;
|
|
|
1086 }
|
|
|
1087
|
|
|
1088 if (ch != '/'
|
|
|
1089 #if (NGX_WIN32)
|
|
|
1090 && ch != '\\'
|
|
|
1091 #endif
|
|
|
1092 )
|
|
|
1093 {
|
|
|
1094 continue;
|
|
|
1095 }
|
|
|
1096
|
|
|
1097 if (len > 2) {
|
|
|
1098
|
|
|
1099 /* detect "/../" */
|
|
|
1100
|
|
124
|
1101 if (p[0] == '.' && p[1] == '.' && p[2] == '/') {
|
|
122
|
1102 goto unsafe;
|
|
|
1103 }
|
|
|
1104
|
|
|
1105 #if (NGX_WIN32)
|
|
|
1106
|
|
|
1107 if (p[2] == '\\') {
|
|
|
1108 goto unsafe;
|
|
|
1109 }
|
|
|
1110
|
|
|
1111 if (len > 3) {
|
|
|
1112
|
|
|
1113 /* detect "/.../" */
|
|
|
1114
|
|
124
|
1115 if (p[0] == '.' && p[1] == '.' && p[2] == '.'
|
|
|
1116 && (p[3] == '/' || p[3] == '\\'))
|
|
|
1117 {
|
|
122
|
1118 goto unsafe;
|
|
|
1119 }
|
|
|
1120 }
|
|
|
1121 #endif
|
|
|
1122 }
|
|
|
1123 }
|
|
|
1124
|
|
|
1125 return NGX_OK;
|
|
|
1126
|
|
|
1127 unsafe:
|
|
|
1128
|
|
|
1129 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
1130 "unsafe URI \"%V\" was detected", uri);
|
|
|
1131
|
|
|
1132 return NGX_ERROR;
|
|
|
1133 }
|
|
|
1134
|
|
|
1135
|
|
|
1136 ngx_int_t
|
|
58
|
1137 ngx_http_parse_multi_header_lines(ngx_array_t *headers, ngx_str_t *name,
|
|
|
1138 ngx_str_t *value)
|
|
|
1139 {
|
|
|
1140 ngx_uint_t i;
|
|
|
1141 u_char *start, *last, *end, ch;
|
|
|
1142 ngx_table_elt_t **h;
|
|
|
1143
|
|
|
1144 h = headers->elts;
|
|
|
1145
|
|
|
1146 for (i = 0; i < headers->nelts; i++) {
|
|
|
1147
|
|
|
1148 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, headers->pool->log, 0,
|
|
|
1149 "parse header: \"%V: %V\"", &h[i]->key, &h[i]->value);
|
|
|
1150
|
|
|
1151 if (name->len > h[i]->value.len) {
|
|
|
1152 continue;
|
|
|
1153 }
|
|
126
|
1154
|
|
58
|
1155 start = h[i]->value.data;
|
|
|
1156 end = h[i]->value.data + h[i]->value.len;
|
|
|
1157
|
|
|
1158 while (start < end) {
|
|
|
1159
|
|
|
1160 if (ngx_strncasecmp(start, name->data, name->len) != 0) {
|
|
|
1161 goto skip;
|
|
|
1162 }
|
|
|
1163
|
|
|
1164 for (start += name->len; start < end && *start == ' '; start++) {
|
|
|
1165 /* void */
|
|
|
1166 }
|
|
|
1167
|
|
|
1168 if (value == NULL) {
|
|
|
1169 if (start == end || *start == ',') {
|
|
|
1170 return i;
|
|
|
1171 }
|
|
|
1172
|
|
|
1173 goto skip;
|
|
|
1174 }
|
|
|
1175
|
|
|
1176 if (start == end || *start++ != '=') {
|
|
|
1177 /* the invalid header value */
|
|
|
1178 goto skip;
|
|
|
1179 }
|
|
|
1180
|
|
|
1181 while (start < end && *start == ' ') { start++; }
|
|
|
1182
|
|
|
1183 for (last = start; last < end && *last != ';'; last++) {
|
|
|
1184 /* void */
|
|
|
1185 }
|
|
|
1186
|
|
|
1187 value->len = last - start;
|
|
|
1188 value->data = start;
|
|
|
1189
|
|
|
1190 return i;
|
|
|
1191
|
|
|
1192 skip:
|
|
122
|
1193
|
|
58
|
1194 while (start < end) {
|
|
|
1195 ch = *start++;
|
|
|
1196 if (ch == ';' || ch == ',') {
|
|
|
1197 break;
|
|
|
1198 }
|
|
|
1199 }
|
|
|
1200
|
|
|
1201 while (start < end && *start == ' ') { start++; }
|
|
|
1202 }
|
|
|
1203 }
|
|
|
1204
|
|
|
1205 return NGX_DECLINED;
|
|
|
1206 }
|
