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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
|
|
198
|
540 static u_char lowcase[] =
|
|
|
541 "\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"
|
|
|
542 "\0\0\0\0\0\0\0\0\0\0\0\0\0-\0\0" "0123456789\0\0\0\0\0\0"
|
|
|
543 "\0abcdefghijklmnopqrstuvwxyz\0\0\0\0\0"
|
|
|
544 "\0abcdefghijklmnopqrstuvwxyz\0\0\0\0\0"
|
|
|
545 "\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"
|
|
|
546 "\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"
|
|
|
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";
|
|
|
549
|
|
0
|
550 state = r->state;
|
|
56
|
551 hash = r->header_hash;
|
|
198
|
552 i = r->lowcase_index;
|
|
0
|
553
|
|
28
|
554 for (p = b->pos; p < b->last; p++) {
|
|
|
555 ch = *p;
|
|
0
|
556
|
|
|
557 switch (state) {
|
|
|
558
|
|
|
559 /* first char */
|
|
|
560 case sw_start:
|
|
60
|
561 r->invalid_header = 0;
|
|
|
562
|
|
0
|
563 switch (ch) {
|
|
|
564 case CR:
|
|
28
|
565 r->header_end = p;
|
|
0
|
566 state = sw_header_almost_done;
|
|
|
567 break;
|
|
|
568 case LF:
|
|
28
|
569 r->header_end = p;
|
|
|
570 goto header_done;
|
|
0
|
571 default:
|
|
|
572 state = sw_name;
|
|
28
|
573 r->header_name_start = p;
|
|
0
|
574
|
|
198
|
575 c = lowcase[ch];
|
|
0
|
576
|
|
198
|
577 if (c) {
|
|
|
578 hash = ngx_hash(0, c);
|
|
|
579 r->lowcase_header[0] = c;
|
|
|
580 i = 1;
|
|
0
|
581 break;
|
|
|
582 }
|
|
|
583
|
|
60
|
584 r->invalid_header = 1;
|
|
|
585
|
|
52
|
586 break;
|
|
0
|
587
|
|
|
588 }
|
|
|
589 break;
|
|
|
590
|
|
|
591 /* header name */
|
|
|
592 case sw_name:
|
|
198
|
593 c = lowcase[ch];
|
|
|
594
|
|
|
595 if (c) {
|
|
|
596 hash = ngx_hash(hash, c);
|
|
|
597 r->lowcase_header[i++] = c;
|
|
|
598 i &= ~NGX_HTTP_LC_HEADER_LEN;
|
|
0
|
599 break;
|
|
|
600 }
|
|
|
601
|
|
|
602 if (ch == ':') {
|
|
28
|
603 r->header_name_end = p;
|
|
0
|
604 state = sw_space_before_value;
|
|
|
605 break;
|
|
|
606 }
|
|
|
607
|
|
58
|
608 if (ch == CR) {
|
|
|
609 r->header_name_end = p;
|
|
|
610 r->header_start = p;
|
|
|
611 r->header_end = p;
|
|
|
612 state = sw_almost_done;
|
|
|
613 break;
|
|
|
614 }
|
|
|
615
|
|
|
616 if (ch == LF) {
|
|
|
617 r->header_name_end = p;
|
|
|
618 r->header_start = p;
|
|
|
619 r->header_end = p;
|
|
|
620 goto done;
|
|
|
621 }
|
|
|
622
|
|
2
|
623 /* IIS may send the duplicate "HTTP/1.1 ..." lines */
|
|
0
|
624 if (ch == '/'
|
|
58
|
625 && r->upstream
|
|
|
626 && p - r->header_name_start == 4
|
|
|
627 && ngx_strncmp(r->header_name_start, "HTTP", 4) == 0)
|
|
0
|
628 {
|
|
|
629 state = sw_ignore_line;
|
|
|
630 break;
|
|
|
631 }
|
|
|
632
|
|
60
|
633 r->invalid_header = 1;
|
|
|
634
|
|
52
|
635 break;
|
|
0
|
636
|
|
|
637 /* space* before header value */
|
|
|
638 case sw_space_before_value:
|
|
|
639 switch (ch) {
|
|
|
640 case ' ':
|
|
|
641 break;
|
|
|
642 case CR:
|
|
58
|
643 r->header_start = p;
|
|
|
644 r->header_end = p;
|
|
0
|
645 state = sw_almost_done;
|
|
|
646 break;
|
|
|
647 case LF:
|
|
58
|
648 r->header_start = p;
|
|
|
649 r->header_end = p;
|
|
28
|
650 goto done;
|
|
0
|
651 default:
|
|
28
|
652 r->header_start = p;
|
|
0
|
653 state = sw_value;
|
|
|
654 break;
|
|
|
655 }
|
|
|
656 break;
|
|
|
657
|
|
|
658 /* header value */
|
|
|
659 case sw_value:
|
|
|
660 switch (ch) {
|
|
|
661 case ' ':
|
|
28
|
662 r->header_end = p;
|
|
0
|
663 state = sw_space_after_value;
|
|
|
664 break;
|
|
|
665 case CR:
|
|
28
|
666 r->header_end = p;
|
|
0
|
667 state = sw_almost_done;
|
|
|
668 break;
|
|
|
669 case LF:
|
|
28
|
670 r->header_end = p;
|
|
|
671 goto done;
|
|
0
|
672 }
|
|
|
673 break;
|
|
|
674
|
|
|
675 /* space* before end of header line */
|
|
|
676 case sw_space_after_value:
|
|
|
677 switch (ch) {
|
|
|
678 case ' ':
|
|
|
679 break;
|
|
|
680 case CR:
|
|
|
681 state = sw_almost_done;
|
|
|
682 break;
|
|
|
683 case LF:
|
|
28
|
684 goto done;
|
|
0
|
685 default:
|
|
|
686 state = sw_value;
|
|
|
687 break;
|
|
|
688 }
|
|
|
689 break;
|
|
|
690
|
|
|
691 /* ignore header line */
|
|
|
692 case sw_ignore_line:
|
|
|
693 switch (ch) {
|
|
|
694 case LF:
|
|
|
695 state = sw_start;
|
|
|
696 break;
|
|
|
697 default:
|
|
|
698 break;
|
|
|
699 }
|
|
|
700 break;
|
|
|
701
|
|
|
702 /* end of header line */
|
|
|
703 case sw_almost_done:
|
|
|
704 switch (ch) {
|
|
172
|
705 case CR:
|
|
|
706 break;
|
|
0
|
707 case LF:
|
|
28
|
708 goto done;
|
|
0
|
709 default:
|
|
|
710 return NGX_HTTP_PARSE_INVALID_HEADER;
|
|
|
711 }
|
|
174
|
712 break;
|
|
0
|
713
|
|
|
714 /* end of header */
|
|
|
715 case sw_header_almost_done:
|
|
|
716 switch (ch) {
|
|
|
717 case LF:
|
|
28
|
718 goto header_done;
|
|
0
|
719 default:
|
|
|
720 return NGX_HTTP_PARSE_INVALID_HEADER;
|
|
|
721 }
|
|
|
722 }
|
|
|
723 }
|
|
|
724
|
|
|
725 b->pos = p;
|
|
28
|
726 r->state = state;
|
|
56
|
727 r->header_hash = hash;
|
|
198
|
728 r->lowcase_index = i;
|
|
0
|
729
|
|
28
|
730 return NGX_AGAIN;
|
|
|
731
|
|
|
732 done:
|
|
|
733
|
|
|
734 b->pos = p + 1;
|
|
|
735 r->state = sw_start;
|
|
56
|
736 r->header_hash = hash;
|
|
198
|
737 r->lowcase_index = i;
|
|
0
|
738
|
|
28
|
739 return NGX_OK;
|
|
|
740
|
|
|
741 header_done:
|
|
0
|
742
|
|
28
|
743 b->pos = p + 1;
|
|
|
744 r->state = sw_start;
|
|
|
745
|
|
|
746 return NGX_HTTP_PARSE_HEADER_DONE;
|
|
0
|
747 }
|
|
|
748
|
|
|
749
|
|
58
|
750 ngx_int_t
|
|
|
751 ngx_http_parse_complex_uri(ngx_http_request_t *r)
|
|
0
|
752 {
|
|
|
753 u_char c, ch, decoded, *p, *u;
|
|
|
754 enum {
|
|
|
755 sw_usual = 0,
|
|
|
756 sw_slash,
|
|
|
757 sw_dot,
|
|
|
758 sw_dot_dot,
|
|
10
|
759 #if (NGX_WIN32)
|
|
0
|
760 sw_dot_dot_dot,
|
|
|
761 #endif
|
|
|
762 sw_quoted,
|
|
|
763 sw_quoted_second
|
|
|
764 } state, quoted_state;
|
|
|
765
|
|
28
|
766 #if (NGX_SUPPRESS_WARN)
|
|
0
|
767 decoded = '\0';
|
|
|
768 quoted_state = sw_usual;
|
|
28
|
769 #endif
|
|
0
|
770
|
|
|
771 state = sw_usual;
|
|
|
772 p = r->uri_start;
|
|
|
773 u = r->uri.data;
|
|
|
774 r->uri_ext = NULL;
|
|
10
|
775 r->args_start = NULL;
|
|
0
|
776
|
|
|
777 ch = *p++;
|
|
|
778
|
|
28
|
779 while (p <= r->uri_end) {
|
|
10
|
780
|
|
|
781 /*
|
|
28
|
782 * we use "ch = *p++" inside the cycle, but this operation is safe,
|
|
10
|
783 * because after the URI there is always at least one charcter:
|
|
|
784 * the line feed
|
|
|
785 */
|
|
0
|
786
|
|
|
787 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
10
|
788 "s:%d in:'%Xd:%c', out:'%c'", state, ch, ch, *u);
|
|
0
|
789
|
|
|
790 switch (state) {
|
|
122
|
791
|
|
0
|
792 case sw_usual:
|
|
|
793 switch(ch) {
|
|
10
|
794 #if (NGX_WIN32)
|
|
|
795 case '\\':
|
|
|
796 r->uri_ext = NULL;
|
|
|
797
|
|
|
798 if (p == r->uri_start + r->uri.len) {
|
|
|
799
|
|
|
800 /*
|
|
|
801 * we omit the last "\" to cause redirect because
|
|
|
802 * the browsers do not treat "\" as "/" in relative URL path
|
|
|
803 */
|
|
|
804
|
|
|
805 break;
|
|
|
806 }
|
|
|
807
|
|
|
808 state = sw_slash;
|
|
|
809 *u++ = '/';
|
|
|
810 break;
|
|
|
811 #endif
|
|
0
|
812 case '/':
|
|
|
813 r->uri_ext = NULL;
|
|
|
814 state = sw_slash;
|
|
|
815 *u++ = ch;
|
|
|
816 break;
|
|
|
817 case '%':
|
|
|
818 quoted_state = state;
|
|
|
819 state = sw_quoted;
|
|
|
820 break;
|
|
10
|
821 case '?':
|
|
|
822 r->args_start = p;
|
|
28
|
823 goto done;
|
|
0
|
824 case '.':
|
|
|
825 r->uri_ext = u + 1;
|
|
22
|
826 *u++ = ch;
|
|
|
827 break;
|
|
206
|
828 case '+':
|
|
|
829 r->plus_in_uri = 1;
|
|
0
|
830 default:
|
|
|
831 *u++ = ch;
|
|
|
832 break;
|
|
|
833 }
|
|
|
834 ch = *p++;
|
|
|
835 break;
|
|
|
836
|
|
|
837 case sw_slash:
|
|
|
838 switch(ch) {
|
|
10
|
839 #if (NGX_WIN32)
|
|
|
840 case '\\':
|
|
|
841 #endif
|
|
0
|
842 case '/':
|
|
|
843 break;
|
|
|
844 case '.':
|
|
|
845 state = sw_dot;
|
|
|
846 *u++ = ch;
|
|
|
847 break;
|
|
|
848 case '%':
|
|
|
849 quoted_state = state;
|
|
|
850 state = sw_quoted;
|
|
|
851 break;
|
|
28
|
852 case '?':
|
|
|
853 r->args_start = p;
|
|
|
854 goto done;
|
|
206
|
855 case '+':
|
|
|
856 r->plus_in_uri = 1;
|
|
0
|
857 default:
|
|
|
858 state = sw_usual;
|
|
|
859 *u++ = ch;
|
|
|
860 break;
|
|
|
861 }
|
|
|
862 ch = *p++;
|
|
|
863 break;
|
|
|
864
|
|
|
865 case sw_dot:
|
|
|
866 switch(ch) {
|
|
10
|
867 #if (NGX_WIN32)
|
|
|
868 case '\\':
|
|
|
869 #endif
|
|
0
|
870 case '/':
|
|
|
871 state = sw_slash;
|
|
|
872 u--;
|
|
|
873 break;
|
|
|
874 case '.':
|
|
|
875 state = sw_dot_dot;
|
|
|
876 *u++ = ch;
|
|
|
877 break;
|
|
|
878 case '%':
|
|
|
879 quoted_state = state;
|
|
|
880 state = sw_quoted;
|
|
|
881 break;
|
|
28
|
882 case '?':
|
|
|
883 r->args_start = p;
|
|
|
884 goto done;
|
|
206
|
885 case '+':
|
|
|
886 r->plus_in_uri = 1;
|
|
0
|
887 default:
|
|
|
888 state = sw_usual;
|
|
|
889 *u++ = ch;
|
|
|
890 break;
|
|
|
891 }
|
|
|
892 ch = *p++;
|
|
|
893 break;
|
|
|
894
|
|
|
895 case sw_dot_dot:
|
|
|
896 switch(ch) {
|
|
10
|
897 #if (NGX_WIN32)
|
|
|
898 case '\\':
|
|
|
899 #endif
|
|
0
|
900 case '/':
|
|
|
901 state = sw_slash;
|
|
|
902 u -= 4;
|
|
|
903 if (u < r->uri.data) {
|
|
|
904 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
905 }
|
|
|
906 while (*(u - 1) != '/') {
|
|
|
907 u--;
|
|
|
908 }
|
|
|
909 break;
|
|
|
910 case '%':
|
|
|
911 quoted_state = state;
|
|
|
912 state = sw_quoted;
|
|
|
913 break;
|
|
28
|
914 case '?':
|
|
|
915 r->args_start = p;
|
|
|
916 goto done;
|
|
10
|
917 #if (NGX_WIN32)
|
|
0
|
918 case '.':
|
|
|
919 state = sw_dot_dot_dot;
|
|
|
920 *u++ = ch;
|
|
|
921 break;
|
|
|
922 #endif
|
|
206
|
923 case '+':
|
|
|
924 r->plus_in_uri = 1;
|
|
0
|
925 default:
|
|
|
926 state = sw_usual;
|
|
|
927 *u++ = ch;
|
|
|
928 break;
|
|
|
929 }
|
|
|
930 ch = *p++;
|
|
|
931 break;
|
|
|
932
|
|
10
|
933 #if (NGX_WIN32)
|
|
0
|
934 case sw_dot_dot_dot:
|
|
|
935 switch(ch) {
|
|
10
|
936 case '\\':
|
|
0
|
937 case '/':
|
|
|
938 state = sw_slash;
|
|
|
939 u -= 5;
|
|
|
940 if (u < r->uri.data) {
|
|
|
941 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
942 }
|
|
|
943 while (*u != '/') {
|
|
|
944 u--;
|
|
|
945 }
|
|
|
946 if (u < r->uri.data) {
|
|
|
947 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
948 }
|
|
|
949 while (*(u - 1) != '/') {
|
|
|
950 u--;
|
|
|
951 }
|
|
|
952 break;
|
|
|
953 case '%':
|
|
|
954 quoted_state = state;
|
|
|
955 state = sw_quoted;
|
|
|
956 break;
|
|
122
|
957 case '?':
|
|
|
958 r->args_start = p;
|
|
|
959 goto done;
|
|
206
|
960 case '+':
|
|
|
961 r->plus_in_uri = 1;
|
|
0
|
962 default:
|
|
|
963 state = sw_usual;
|
|
|
964 *u++ = ch;
|
|
|
965 break;
|
|
|
966 }
|
|
|
967 ch = *p++;
|
|
|
968 break;
|
|
|
969 #endif
|
|
|
970
|
|
|
971 case sw_quoted:
|
|
216
|
972 r->quoted_uri = 1;
|
|
|
973
|
|
0
|
974 if (ch >= '0' && ch <= '9') {
|
|
|
975 decoded = (u_char) (ch - '0');
|
|
|
976 state = sw_quoted_second;
|
|
|
977 ch = *p++;
|
|
|
978 break;
|
|
|
979 }
|
|
|
980
|
|
|
981 c = (u_char) (ch | 0x20);
|
|
|
982 if (c >= 'a' && c <= 'f') {
|
|
|
983 decoded = (u_char) (c - 'a' + 10);
|
|
|
984 state = sw_quoted_second;
|
|
|
985 ch = *p++;
|
|
|
986 break;
|
|
|
987 }
|
|
|
988
|
|
|
989 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
990
|
|
|
991 case sw_quoted_second:
|
|
|
992 if (ch >= '0' && ch <= '9') {
|
|
|
993 ch = (u_char) ((decoded << 4) + ch - '0');
|
|
38
|
994
|
|
0
|
995 if (ch == '%') {
|
|
|
996 state = sw_usual;
|
|
|
997 *u++ = ch;
|
|
|
998 ch = *p++;
|
|
|
999 break;
|
|
|
1000 }
|
|
38
|
1001
|
|
|
1002 if (ch == '\0') {
|
|
|
1003 r->zero_in_uri = 1;
|
|
|
1004 }
|
|
|
1005
|
|
0
|
1006 state = quoted_state;
|
|
|
1007 break;
|
|
|
1008 }
|
|
|
1009
|
|
|
1010 c = (u_char) (ch | 0x20);
|
|
|
1011 if (c >= 'a' && c <= 'f') {
|
|
|
1012 ch = (u_char) ((decoded << 4) + c - 'a' + 10);
|
|
206
|
1013
|
|
28
|
1014 if (ch == '?') {
|
|
0
|
1015 *u++ = ch;
|
|
|
1016 ch = *p++;
|
|
206
|
1017
|
|
|
1018 } else if (ch == '+') {
|
|
|
1019 r->plus_in_uri = 1;
|
|
0
|
1020 }
|
|
206
|
1021
|
|
0
|
1022 state = quoted_state;
|
|
|
1023 break;
|
|
|
1024 }
|
|
|
1025
|
|
|
1026 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
1027 }
|
|
|
1028 }
|
|
|
1029
|
|
28
|
1030 done:
|
|
|
1031
|
|
0
|
1032 r->uri.len = u - r->uri.data;
|
|
|
1033 r->uri.data[r->uri.len] = '\0';
|
|
|
1034
|
|
|
1035 if (r->uri_ext) {
|
|
|
1036 r->exten.len = u - r->uri_ext;
|
|
10
|
1037 r->exten.data = r->uri_ext;
|
|
0
|
1038 }
|
|
|
1039
|
|
|
1040 r->uri_ext = NULL;
|
|
|
1041
|
|
|
1042 return NGX_OK;
|
|
|
1043 }
|
|
58
|
1044
|
|
|
1045
|
|
|
1046 ngx_int_t
|
|
122
|
1047 ngx_http_parse_unsafe_uri(ngx_http_request_t *r, ngx_str_t *uri,
|
|
|
1048 ngx_str_t *args, ngx_uint_t *flags)
|
|
|
1049 {
|
|
|
1050 u_char ch, *p;
|
|
|
1051 size_t len;
|
|
|
1052
|
|
|
1053 len = uri->len;
|
|
|
1054 p = uri->data;
|
|
|
1055
|
|
|
1056 if (len == 0 || p[0] == '?') {
|
|
|
1057 goto unsafe;
|
|
|
1058 }
|
|
|
1059
|
|
|
1060 if (p[0] == '.' && len == 3 && p[1] == '.' && (p[2] == '/'
|
|
|
1061 #if (NGX_WIN32)
|
|
|
1062 || p[2] == '\\'
|
|
|
1063 #endif
|
|
|
1064 ))
|
|
|
1065 {
|
|
|
1066 goto unsafe;
|
|
|
1067 }
|
|
|
1068
|
|
|
1069 for ( /* void */ ; len; len--) {
|
|
|
1070
|
|
|
1071 ch = *p++;
|
|
|
1072
|
|
|
1073 if (ch == '?') {
|
|
|
1074 args->len = len - 1;
|
|
|
1075 args->data = p;
|
|
|
1076 uri->len -= len;
|
|
|
1077
|
|
|
1078 return NGX_OK;
|
|
|
1079 }
|
|
|
1080
|
|
|
1081 if (ch == '\0') {
|
|
|
1082 *flags |= NGX_HTTP_ZERO_IN_URI;
|
|
|
1083 continue;
|
|
|
1084 }
|
|
|
1085
|
|
|
1086 if (ch != '/'
|
|
|
1087 #if (NGX_WIN32)
|
|
|
1088 && ch != '\\'
|
|
|
1089 #endif
|
|
|
1090 )
|
|
|
1091 {
|
|
|
1092 continue;
|
|
|
1093 }
|
|
|
1094
|
|
|
1095 if (len > 2) {
|
|
|
1096
|
|
|
1097 /* detect "/../" */
|
|
|
1098
|
|
124
|
1099 if (p[0] == '.' && p[1] == '.' && p[2] == '/') {
|
|
122
|
1100 goto unsafe;
|
|
|
1101 }
|
|
|
1102
|
|
|
1103 #if (NGX_WIN32)
|
|
|
1104
|
|
|
1105 if (p[2] == '\\') {
|
|
|
1106 goto unsafe;
|
|
|
1107 }
|
|
|
1108
|
|
|
1109 if (len > 3) {
|
|
|
1110
|
|
|
1111 /* detect "/.../" */
|
|
|
1112
|
|
124
|
1113 if (p[0] == '.' && p[1] == '.' && p[2] == '.'
|
|
|
1114 && (p[3] == '/' || p[3] == '\\'))
|
|
|
1115 {
|
|
122
|
1116 goto unsafe;
|
|
|
1117 }
|
|
|
1118 }
|
|
|
1119 #endif
|
|
|
1120 }
|
|
|
1121 }
|
|
|
1122
|
|
|
1123 return NGX_OK;
|
|
|
1124
|
|
|
1125 unsafe:
|
|
|
1126
|
|
|
1127 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
1128 "unsafe URI \"%V\" was detected", uri);
|
|
|
1129
|
|
|
1130 return NGX_ERROR;
|
|
|
1131 }
|
|
|
1132
|
|
|
1133
|
|
|
1134 ngx_int_t
|
|
58
|
1135 ngx_http_parse_multi_header_lines(ngx_array_t *headers, ngx_str_t *name,
|
|
|
1136 ngx_str_t *value)
|
|
|
1137 {
|
|
|
1138 ngx_uint_t i;
|
|
|
1139 u_char *start, *last, *end, ch;
|
|
|
1140 ngx_table_elt_t **h;
|
|
|
1141
|
|
|
1142 h = headers->elts;
|
|
|
1143
|
|
|
1144 for (i = 0; i < headers->nelts; i++) {
|
|
|
1145
|
|
|
1146 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, headers->pool->log, 0,
|
|
|
1147 "parse header: \"%V: %V\"", &h[i]->key, &h[i]->value);
|
|
|
1148
|
|
|
1149 if (name->len > h[i]->value.len) {
|
|
|
1150 continue;
|
|
|
1151 }
|
|
126
|
1152
|
|
58
|
1153 start = h[i]->value.data;
|
|
|
1154 end = h[i]->value.data + h[i]->value.len;
|
|
|
1155
|
|
|
1156 while (start < end) {
|
|
|
1157
|
|
|
1158 if (ngx_strncasecmp(start, name->data, name->len) != 0) {
|
|
|
1159 goto skip;
|
|
|
1160 }
|
|
|
1161
|
|
|
1162 for (start += name->len; start < end && *start == ' '; start++) {
|
|
|
1163 /* void */
|
|
|
1164 }
|
|
|
1165
|
|
|
1166 if (value == NULL) {
|
|
|
1167 if (start == end || *start == ',') {
|
|
|
1168 return i;
|
|
|
1169 }
|
|
|
1170
|
|
|
1171 goto skip;
|
|
|
1172 }
|
|
|
1173
|
|
|
1174 if (start == end || *start++ != '=') {
|
|
|
1175 /* the invalid header value */
|
|
|
1176 goto skip;
|
|
|
1177 }
|
|
|
1178
|
|
|
1179 while (start < end && *start == ' ') { start++; }
|
|
|
1180
|
|
|
1181 for (last = start; last < end && *last != ';'; last++) {
|
|
|
1182 /* void */
|
|
|
1183 }
|
|
|
1184
|
|
|
1185 value->len = last - start;
|
|
|
1186 value->data = start;
|
|
|
1187
|
|
|
1188 return i;
|
|
|
1189
|
|
|
1190 skip:
|
|
122
|
1191
|
|
58
|
1192 while (start < end) {
|
|
|
1193 ch = *start++;
|
|
|
1194 if (ch == ';' || ch == ',') {
|
|
|
1195 break;
|
|
|
1196 }
|
|
|
1197 }
|
|
|
1198
|
|
|
1199 while (start < end && *start == ' ') { start++; }
|
|
|
1200 }
|
|
|
1201 }
|
|
|
1202
|
|
|
1203 return NGX_DECLINED;
|
|
|
1204 }
|
