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0
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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6
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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9 #include <ngx_http.h>
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10
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11
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58
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12 ngx_int_t
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13 ngx_http_parse_request_line(ngx_http_request_t *r, ngx_buf_t *b)
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0
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14 {
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56
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15 u_char c, ch, *p, *m;
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0
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16 enum {
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17 sw_start = 0,
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18 sw_method,
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19 sw_space_after_method,
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20 sw_spaces_before_uri,
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21 sw_schema,
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22 sw_schema_slash,
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23 sw_schema_slash_slash,
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24 sw_host,
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25 sw_port,
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26 sw_after_slash_in_uri,
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27 sw_check_uri,
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28 sw_uri,
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29 sw_http_09,
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30 sw_http_H,
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31 sw_http_HT,
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32 sw_http_HTT,
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33 sw_http_HTTP,
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34 sw_first_major_digit,
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35 sw_major_digit,
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36 sw_first_minor_digit,
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37 sw_minor_digit,
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28
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38 sw_almost_done
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0
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39 } state;
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40
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41 state = r->state;
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42
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28
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43 for (p = b->pos; p < b->last; p++) {
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44 ch = *p;
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0
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45
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46 /* gcc 2.95.2 and msvc 6.0 compile this switch as an jump table */
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47
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48 switch (state) {
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49
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50 /* HTTP methods: GET, HEAD, POST */
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51 case sw_start:
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28
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52 r->request_start = p;
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0
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53
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54 if (ch == CR || ch == LF) {
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55 break;
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56 }
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57
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58 if (ch < 'A' || ch > 'Z') {
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59 return NGX_HTTP_PARSE_INVALID_METHOD;
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60 }
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61
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62 state = sw_method;
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63 break;
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64
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65 case sw_method:
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66 if (ch == ' ') {
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58
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67 r->method_end = p - 1;
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0
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68 m = r->request_start;
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69
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28
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70 if (p - m == 3) {
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0
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71
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72 if (m[0] == 'G' && m[1] == 'E' && m[2] == 'T') {
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73 r->method = NGX_HTTP_GET;
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182
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74
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75 } else if (m[0] == 'P' && m[1] == 'U' && m[2] == 'T') {
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76 r->method = NGX_HTTP_PUT;
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0
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77 }
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78
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28
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79 } else if (p - m == 4) {
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0
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80
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81 if (m[0] == 'P' && m[1] == 'O'
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28
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82 && m[2] == 'S' && m[3] == 'T')
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0
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83 {
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84 r->method = NGX_HTTP_POST;
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85
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86 } else if (m[0] == 'H' && m[1] == 'E'
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87 && m[2] == 'A' && m[3] == 'D')
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88 {
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89 r->method = NGX_HTTP_HEAD;
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90 }
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182
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91
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186
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92 } else if (p - m == 5) {
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93
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94 if (m[0] == 'M' && m[1] == 'K'
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95 && m[2] == 'C' && m[3] == 'O' && m[4] == 'L')
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96 {
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97 r->method = NGX_HTTP_MKCOL;
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98 }
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99
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182
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100 } else if (p - m == 6) {
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101
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102 if (m[0] == 'D' && m[1] == 'E' && m[2] == 'L'
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103 && m[3] == 'E' && m[4] == 'T' && m[5] == 'E')
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104 {
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105 r->method = NGX_HTTP_DELETE;
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106 }
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0
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107 }
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108
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109 state = sw_spaces_before_uri;
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110 break;
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111 }
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112
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113 if (ch < 'A' || ch > 'Z') {
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114 return NGX_HTTP_PARSE_INVALID_METHOD;
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115 }
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116
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117 break;
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118
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119 /* single space after method */
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120 case sw_space_after_method:
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121 switch (ch) {
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122 case ' ':
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123 state = sw_spaces_before_uri;
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124 break;
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125 default:
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126 return NGX_HTTP_PARSE_INVALID_METHOD;
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127 }
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128 break;
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129
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130 /* space* before URI */
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131 case sw_spaces_before_uri:
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56
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132
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133 c = (u_char) (ch | 0x20);
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70
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134 if (c >= 'a' && c <= 'z') {
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38
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135 r->schema_start = p;
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136 state = sw_schema;
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137 break;
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138 }
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139
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0
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140 switch (ch) {
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141 case '/':
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28
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142 r->uri_start = p;
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0
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143 state = sw_after_slash_in_uri;
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144 break;
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145 case ' ':
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146 break;
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147 default:
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148 return NGX_HTTP_PARSE_INVALID_REQUEST;
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149 }
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150 break;
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151
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152 case sw_schema:
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56
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153
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154 c = (u_char) (ch | 0x20);
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70
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155 if (c >= 'a' && c <= 'z') {
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38
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156 break;
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157 }
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158
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0
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159 switch (ch) {
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160 case ':':
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28
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161 r->schema_end = p;
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0
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162 state = sw_schema_slash;
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163 break;
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164 default:
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165 return NGX_HTTP_PARSE_INVALID_REQUEST;
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166 }
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167 break;
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168
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169 case sw_schema_slash:
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170 switch (ch) {
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171 case '/':
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172 state = sw_schema_slash_slash;
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173 break;
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174 default:
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175 return NGX_HTTP_PARSE_INVALID_REQUEST;
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176 }
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177 break;
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178
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179 case sw_schema_slash_slash:
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180 switch (ch) {
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181 case '/':
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28
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182 r->host_start = p;
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0
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183 state = sw_host;
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184 break;
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185 default:
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186 return NGX_HTTP_PARSE_INVALID_REQUEST;
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187 }
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188 break;
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189
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190 case sw_host:
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56
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191
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192 c = (u_char) (ch | 0x20);
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70
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193 if (c >= 'a' && c <= 'z') {
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56
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194 break;
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195 }
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196
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197 if ((ch >= '0' && ch <= '9') || ch == '.' || ch == '-')
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38
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198 {
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199 break;
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200 }
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201
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0
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202 switch (ch) {
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203 case ':':
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28
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204 r->host_end = p;
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0
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205 state = sw_port;
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206 break;
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207 case '/':
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28
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208 r->host_end = p;
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209 r->uri_start = p;
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0
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210 state = sw_after_slash_in_uri;
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211 break;
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212 default:
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213 return NGX_HTTP_PARSE_INVALID_REQUEST;
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214 }
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215 break;
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216
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217 case sw_port:
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38
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218 if (ch >= '0' && ch <= '9') {
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219 break;
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220 }
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221
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0
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222 switch (ch) {
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223 case '/':
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28
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224 r->port_end = p;
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225 r->uri_start = p;
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0
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226 state = sw_after_slash_in_uri;
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227 break;
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228 default:
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38
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229 return NGX_HTTP_PARSE_INVALID_REQUEST;
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0
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230 }
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231 break;
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232
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10
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233 /* check "/.", "//", "%", and "\" (Win32) in URI */
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0
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234 case sw_after_slash_in_uri:
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38
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235
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56
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236 c = (u_char) (ch | 0x20);
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70
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237 if (c >= 'a' && c <= 'z') {
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56
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238 state = sw_check_uri;
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239 break;
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240 }
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241
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242 if (ch >= '0' && ch <= '9') {
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38
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243 state = sw_check_uri;
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244 break;
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245 }
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246
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0
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247 switch (ch) {
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38
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248 case ' ':
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249 r->uri_end = p;
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250 state = sw_http_09;
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251 break;
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0
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252 case CR:
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28
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253 r->uri_end = p;
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0
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254 r->http_minor = 9;
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255 state = sw_almost_done;
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256 break;
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257 case LF:
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28
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258 r->uri_end = p;
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0
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259 r->http_minor = 9;
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28
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260 goto done;
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0
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261 case '.':
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2
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262 r->complex_uri = 1;
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263 state = sw_uri;
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264 break;
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0
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265 case '%':
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2
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266 r->quoted_uri = 1;
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0
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267 state = sw_uri;
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268 break;
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38
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269 case '/':
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270 r->complex_uri = 1;
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271 state = sw_uri;
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272 break;
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10
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273 #if (NGX_WIN32)
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274 case '\\':
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275 r->complex_uri = 1;
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38
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276 state = sw_uri;
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10
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277 break;
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278 #endif
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38
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279 case '?':
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280 r->args_start = p + 1;
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281 state = sw_uri;
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0
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282 break;
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34
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283 case '+':
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284 r->plus_in_uri = 1;
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285 break;
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38
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286 case '\0':
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287 r->zero_in_uri = 1;
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0
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288 break;
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289 default:
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290 state = sw_check_uri;
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291 break;
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292 }
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293 break;
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294
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10
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295 /* check "/", "%" and "\" (Win32) in URI */
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0
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296 case sw_check_uri:
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38
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297
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56
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298 c = (u_char) (ch | 0x20);
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70
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299 if (c >= 'a' && c <= 'z') {
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56
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300 break;
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301 }
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302
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303 if (ch >= '0' && ch <= '9') {
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38
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304 break;
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305 }
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306
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0
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307 switch (ch) {
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38
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308 case '/':
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309 r->uri_ext = NULL;
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310 state = sw_after_slash_in_uri;
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311 break;
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312 case '.':
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313 r->uri_ext = p + 1;
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314 break;
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315 case ' ':
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316 r->uri_end = p;
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317 state = sw_http_09;
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318 break;
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0
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319 case CR:
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28
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320 r->uri_end = p;
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0
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321 r->http_minor = 9;
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322 state = sw_almost_done;
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323 break;
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324 case LF:
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28
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325 r->uri_end = p;
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0
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326 r->http_minor = 9;
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28
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327 goto done;
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10
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328 #if (NGX_WIN32)
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329 case '\\':
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330 r->complex_uri = 1;
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331 state = sw_after_slash_in_uri;
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332 break;
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333 #endif
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38
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334 case '%':
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335 r->quoted_uri = 1;
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336 state = sw_uri;
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0
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337 break;
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34
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338 case '+':
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339 r->plus_in_uri = 1;
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340 break;
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0
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341 case '?':
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28
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342 r->args_start = p + 1;
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0
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343 state = sw_uri;
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344 break;
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38
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345 case '\0':
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346 r->zero_in_uri = 1;
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347 break;
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0
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348 }
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349 break;
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350
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351 /* URI */
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352 case sw_uri:
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353 switch (ch) {
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38
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354 case ' ':
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355 r->uri_end = p;
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356 state = sw_http_09;
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357 break;
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0
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358 case CR:
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28
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359 r->uri_end = p;
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0
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360 r->http_minor = 9;
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361 state = sw_almost_done;
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362 break;
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363 case LF:
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28
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364 r->uri_end = p;
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0
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365 r->http_minor = 9;
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28
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366 goto done;
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34
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367 case '+':
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368 r->plus_in_uri = 1;
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369 break;
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38
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370 case '\0':
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371 r->zero_in_uri = 1;
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0
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372 break;
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373 }
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374 break;
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375
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376 /* space+ after URI */
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377 case sw_http_09:
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378 switch (ch) {
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379 case ' ':
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380 break;
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381 case CR:
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382 r->http_minor = 9;
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383 state = sw_almost_done;
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384 break;
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385 case LF:
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386 r->http_minor = 9;
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28
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387 goto done;
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0
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388 case 'H':
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28
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389 r->http_protocol.data = p;
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0
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390 state = sw_http_H;
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391 break;
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392 default:
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393 return NGX_HTTP_PARSE_INVALID_REQUEST;
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394 }
|
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395 break;
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396
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397 case sw_http_H:
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398 switch (ch) {
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399 case 'T':
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400 state = sw_http_HT;
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401 break;
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402 default:
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403 return NGX_HTTP_PARSE_INVALID_REQUEST;
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404 }
|
|
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405 break;
|
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406
|
|
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407 case sw_http_HT:
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408 switch (ch) {
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409 case 'T':
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410 state = sw_http_HTT;
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411 break;
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412 default:
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413 return NGX_HTTP_PARSE_INVALID_REQUEST;
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414 }
|
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415 break;
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416
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|
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417 case sw_http_HTT:
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418 switch (ch) {
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419 case 'P':
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420 state = sw_http_HTTP;
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421 break;
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422 default:
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423 return NGX_HTTP_PARSE_INVALID_REQUEST;
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424 }
|
|
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425 break;
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426
|
|
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427 case sw_http_HTTP:
|
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428 switch (ch) {
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429 case '/':
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430 state = sw_first_major_digit;
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|
431 break;
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432 default:
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433 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
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434 }
|
|
|
435 break;
|
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436
|
|
|
437 /* first digit of major HTTP version */
|
|
|
438 case sw_first_major_digit:
|
|
|
439 if (ch < '1' || ch > '9') {
|
|
|
440 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
441 }
|
|
|
442
|
|
|
443 r->http_major = ch - '0';
|
|
|
444 state = sw_major_digit;
|
|
|
445 break;
|
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446
|
|
|
447 /* major HTTP version or dot */
|
|
|
448 case sw_major_digit:
|
|
|
449 if (ch == '.') {
|
|
|
450 state = sw_first_minor_digit;
|
|
|
451 break;
|
|
|
452 }
|
|
|
453
|
|
|
454 if (ch < '0' || ch > '9') {
|
|
|
455 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
456 }
|
|
|
457
|
|
|
458 r->http_major = r->http_major * 10 + ch - '0';
|
|
|
459 break;
|
|
|
460
|
|
|
461 /* first digit of minor HTTP version */
|
|
|
462 case sw_first_minor_digit:
|
|
|
463 if (ch < '0' || ch > '9') {
|
|
|
464 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
465 }
|
|
|
466
|
|
|
467 r->http_minor = ch - '0';
|
|
|
468 state = sw_minor_digit;
|
|
|
469 break;
|
|
|
470
|
|
|
471 /* minor HTTP version or end of request line */
|
|
|
472 case sw_minor_digit:
|
|
|
473 if (ch == CR) {
|
|
|
474 state = sw_almost_done;
|
|
|
475 break;
|
|
|
476 }
|
|
|
477
|
|
|
478 if (ch == LF) {
|
|
28
|
479 goto done;
|
|
0
|
480 }
|
|
|
481
|
|
|
482 if (ch < '0' || ch > '9') {
|
|
|
483 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
484 }
|
|
|
485
|
|
|
486 r->http_minor = r->http_minor * 10 + ch - '0';
|
|
|
487 break;
|
|
|
488
|
|
|
489 /* end of request line */
|
|
|
490 case sw_almost_done:
|
|
28
|
491 r->request_end = p - 1;
|
|
0
|
492 switch (ch) {
|
|
|
493 case LF:
|
|
28
|
494 goto done;
|
|
0
|
495 default:
|
|
|
496 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
497 }
|
|
|
498 }
|
|
|
499 }
|
|
|
500
|
|
|
501 b->pos = p;
|
|
28
|
502 r->state = state;
|
|
0
|
503
|
|
28
|
504 return NGX_AGAIN;
|
|
0
|
505
|
|
28
|
506 done:
|
|
|
507
|
|
|
508 b->pos = p + 1;
|
|
0
|
509
|
|
28
|
510 if (r->request_end == NULL) {
|
|
|
511 r->request_end = p;
|
|
|
512 }
|
|
0
|
513
|
|
28
|
514 r->http_version = r->http_major * 1000 + r->http_minor;
|
|
|
515 r->state = sw_start;
|
|
0
|
516
|
|
28
|
517 if (r->http_version == 9 && r->method != NGX_HTTP_GET) {
|
|
|
518 return NGX_HTTP_PARSE_INVALID_09_METHOD;
|
|
0
|
519 }
|
|
28
|
520
|
|
|
521 return NGX_OK;
|
|
0
|
522 }
|
|
|
523
|
|
|
524
|
|
58
|
525 ngx_int_t
|
|
|
526 ngx_http_parse_header_line(ngx_http_request_t *r, ngx_buf_t *b)
|
|
0
|
527 {
|
|
56
|
528 u_char c, ch, *p;
|
|
|
529 ngx_uint_t hash;
|
|
0
|
530 enum {
|
|
|
531 sw_start = 0,
|
|
|
532 sw_name,
|
|
|
533 sw_space_before_value,
|
|
|
534 sw_value,
|
|
|
535 sw_space_after_value,
|
|
52
|
536 sw_ignore_line,
|
|
0
|
537 sw_almost_done,
|
|
52
|
538 sw_header_almost_done
|
|
0
|
539 } state;
|
|
|
540
|
|
|
541 state = r->state;
|
|
56
|
542 hash = r->header_hash;
|
|
0
|
543
|
|
28
|
544 for (p = b->pos; p < b->last; p++) {
|
|
|
545 ch = *p;
|
|
0
|
546
|
|
|
547 switch (state) {
|
|
|
548
|
|
|
549 /* first char */
|
|
|
550 case sw_start:
|
|
60
|
551 r->invalid_header = 0;
|
|
|
552
|
|
0
|
553 switch (ch) {
|
|
|
554 case CR:
|
|
28
|
555 r->header_end = p;
|
|
0
|
556 state = sw_header_almost_done;
|
|
|
557 break;
|
|
|
558 case LF:
|
|
28
|
559 r->header_end = p;
|
|
|
560 goto header_done;
|
|
0
|
561 default:
|
|
|
562 state = sw_name;
|
|
28
|
563 r->header_name_start = p;
|
|
0
|
564
|
|
|
565 c = (u_char) (ch | 0x20);
|
|
|
566 if (c >= 'a' && c <= 'z') {
|
|
56
|
567 hash = c;
|
|
0
|
568 break;
|
|
|
569 }
|
|
|
570
|
|
|
571 if (ch >= '0' && ch <= '9') {
|
|
56
|
572 hash = ch;
|
|
0
|
573 break;
|
|
|
574 }
|
|
|
575
|
|
60
|
576 r->invalid_header = 1;
|
|
|
577
|
|
52
|
578 break;
|
|
0
|
579
|
|
|
580 }
|
|
|
581 break;
|
|
|
582
|
|
|
583 /* header name */
|
|
|
584 case sw_name:
|
|
|
585 c = (u_char) (ch | 0x20);
|
|
|
586 if (c >= 'a' && c <= 'z') {
|
|
56
|
587 hash += c;
|
|
0
|
588 break;
|
|
|
589 }
|
|
|
590
|
|
|
591 if (ch == ':') {
|
|
28
|
592 r->header_name_end = p;
|
|
0
|
593 state = sw_space_before_value;
|
|
|
594 break;
|
|
|
595 }
|
|
|
596
|
|
52
|
597 if (ch == '-') {
|
|
56
|
598 hash += ch;
|
|
0
|
599 break;
|
|
|
600 }
|
|
|
601
|
|
|
602 if (ch >= '0' && ch <= '9') {
|
|
56
|
603 hash += ch;
|
|
0
|
604 break;
|
|
|
605 }
|
|
|
606
|
|
58
|
607 if (ch == CR) {
|
|
|
608 r->header_name_end = p;
|
|
|
609 r->header_start = p;
|
|
|
610 r->header_end = p;
|
|
|
611 state = sw_almost_done;
|
|
|
612 break;
|
|
|
613 }
|
|
|
614
|
|
|
615 if (ch == LF) {
|
|
|
616 r->header_name_end = p;
|
|
|
617 r->header_start = p;
|
|
|
618 r->header_end = p;
|
|
|
619 goto done;
|
|
|
620 }
|
|
|
621
|
|
2
|
622 /* IIS may send the duplicate "HTTP/1.1 ..." lines */
|
|
0
|
623 if (ch == '/'
|
|
58
|
624 && r->upstream
|
|
|
625 && p - r->header_name_start == 4
|
|
|
626 && ngx_strncmp(r->header_name_start, "HTTP", 4) == 0)
|
|
0
|
627 {
|
|
|
628 state = sw_ignore_line;
|
|
|
629 break;
|
|
|
630 }
|
|
|
631
|
|
60
|
632 r->invalid_header = 1;
|
|
|
633
|
|
52
|
634 break;
|
|
0
|
635
|
|
|
636 /* space* before header value */
|
|
|
637 case sw_space_before_value:
|
|
|
638 switch (ch) {
|
|
|
639 case ' ':
|
|
|
640 break;
|
|
|
641 case CR:
|
|
58
|
642 r->header_start = p;
|
|
|
643 r->header_end = p;
|
|
0
|
644 state = sw_almost_done;
|
|
|
645 break;
|
|
|
646 case LF:
|
|
58
|
647 r->header_start = p;
|
|
|
648 r->header_end = p;
|
|
28
|
649 goto done;
|
|
0
|
650 default:
|
|
28
|
651 r->header_start = p;
|
|
0
|
652 state = sw_value;
|
|
|
653 break;
|
|
|
654 }
|
|
|
655 break;
|
|
|
656
|
|
|
657 /* header value */
|
|
|
658 case sw_value:
|
|
|
659 switch (ch) {
|
|
|
660 case ' ':
|
|
28
|
661 r->header_end = p;
|
|
0
|
662 state = sw_space_after_value;
|
|
|
663 break;
|
|
|
664 case CR:
|
|
28
|
665 r->header_end = p;
|
|
0
|
666 state = sw_almost_done;
|
|
|
667 break;
|
|
|
668 case LF:
|
|
28
|
669 r->header_end = p;
|
|
|
670 goto done;
|
|
0
|
671 }
|
|
|
672 break;
|
|
|
673
|
|
|
674 /* space* before end of header line */
|
|
|
675 case sw_space_after_value:
|
|
|
676 switch (ch) {
|
|
|
677 case ' ':
|
|
|
678 break;
|
|
|
679 case CR:
|
|
|
680 state = sw_almost_done;
|
|
|
681 break;
|
|
|
682 case LF:
|
|
28
|
683 goto done;
|
|
0
|
684 default:
|
|
|
685 state = sw_value;
|
|
|
686 break;
|
|
|
687 }
|
|
|
688 break;
|
|
|
689
|
|
|
690 /* ignore header line */
|
|
|
691 case sw_ignore_line:
|
|
|
692 switch (ch) {
|
|
|
693 case LF:
|
|
|
694 state = sw_start;
|
|
|
695 break;
|
|
|
696 default:
|
|
|
697 break;
|
|
|
698 }
|
|
|
699 break;
|
|
|
700
|
|
|
701 /* end of header line */
|
|
|
702 case sw_almost_done:
|
|
|
703 switch (ch) {
|
|
172
|
704 case CR:
|
|
|
705 break;
|
|
0
|
706 case LF:
|
|
28
|
707 goto done;
|
|
0
|
708 default:
|
|
|
709 return NGX_HTTP_PARSE_INVALID_HEADER;
|
|
|
710 }
|
|
174
|
711 break;
|
|
0
|
712
|
|
|
713 /* end of header */
|
|
|
714 case sw_header_almost_done:
|
|
|
715 switch (ch) {
|
|
|
716 case LF:
|
|
28
|
717 goto header_done;
|
|
0
|
718 default:
|
|
|
719 return NGX_HTTP_PARSE_INVALID_HEADER;
|
|
|
720 }
|
|
|
721 }
|
|
|
722 }
|
|
|
723
|
|
|
724 b->pos = p;
|
|
28
|
725 r->state = state;
|
|
56
|
726 r->header_hash = hash;
|
|
0
|
727
|
|
28
|
728 return NGX_AGAIN;
|
|
|
729
|
|
|
730 done:
|
|
|
731
|
|
|
732 b->pos = p + 1;
|
|
|
733 r->state = sw_start;
|
|
56
|
734 r->header_hash = hash;
|
|
0
|
735
|
|
28
|
736 return NGX_OK;
|
|
|
737
|
|
|
738 header_done:
|
|
0
|
739
|
|
28
|
740 b->pos = p + 1;
|
|
|
741 r->state = sw_start;
|
|
|
742
|
|
|
743 return NGX_HTTP_PARSE_HEADER_DONE;
|
|
0
|
744 }
|
|
|
745
|
|
|
746
|
|
58
|
747 ngx_int_t
|
|
|
748 ngx_http_parse_complex_uri(ngx_http_request_t *r)
|
|
0
|
749 {
|
|
|
750 u_char c, ch, decoded, *p, *u;
|
|
|
751 enum {
|
|
|
752 sw_usual = 0,
|
|
|
753 sw_slash,
|
|
|
754 sw_dot,
|
|
|
755 sw_dot_dot,
|
|
10
|
756 #if (NGX_WIN32)
|
|
0
|
757 sw_dot_dot_dot,
|
|
|
758 #endif
|
|
|
759 sw_quoted,
|
|
|
760 sw_quoted_second
|
|
|
761 } state, quoted_state;
|
|
|
762
|
|
28
|
763 #if (NGX_SUPPRESS_WARN)
|
|
0
|
764 decoded = '\0';
|
|
|
765 quoted_state = sw_usual;
|
|
28
|
766 #endif
|
|
0
|
767
|
|
|
768 state = sw_usual;
|
|
|
769 p = r->uri_start;
|
|
|
770 u = r->uri.data;
|
|
|
771 r->uri_ext = NULL;
|
|
10
|
772 r->args_start = NULL;
|
|
0
|
773
|
|
|
774 ch = *p++;
|
|
|
775
|
|
28
|
776 while (p <= r->uri_end) {
|
|
10
|
777
|
|
|
778 /*
|
|
28
|
779 * we use "ch = *p++" inside the cycle, but this operation is safe,
|
|
10
|
780 * because after the URI there is always at least one charcter:
|
|
|
781 * the line feed
|
|
|
782 */
|
|
0
|
783
|
|
|
784 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
10
|
785 "s:%d in:'%Xd:%c', out:'%c'", state, ch, ch, *u);
|
|
0
|
786
|
|
|
787 switch (state) {
|
|
122
|
788
|
|
0
|
789 case sw_usual:
|
|
|
790 switch(ch) {
|
|
10
|
791 #if (NGX_WIN32)
|
|
|
792 case '\\':
|
|
|
793 r->uri_ext = NULL;
|
|
|
794
|
|
|
795 if (p == r->uri_start + r->uri.len) {
|
|
|
796
|
|
|
797 /*
|
|
|
798 * we omit the last "\" to cause redirect because
|
|
|
799 * the browsers do not treat "\" as "/" in relative URL path
|
|
|
800 */
|
|
|
801
|
|
|
802 break;
|
|
|
803 }
|
|
|
804
|
|
|
805 state = sw_slash;
|
|
|
806 *u++ = '/';
|
|
|
807 break;
|
|
|
808 #endif
|
|
0
|
809 case '/':
|
|
|
810 r->uri_ext = NULL;
|
|
|
811 state = sw_slash;
|
|
|
812 *u++ = ch;
|
|
|
813 break;
|
|
|
814 case '%':
|
|
|
815 quoted_state = state;
|
|
|
816 state = sw_quoted;
|
|
|
817 break;
|
|
10
|
818 case '?':
|
|
|
819 r->args_start = p;
|
|
28
|
820 goto done;
|
|
0
|
821 case '.':
|
|
|
822 r->uri_ext = u + 1;
|
|
22
|
823 *u++ = ch;
|
|
|
824 break;
|
|
0
|
825 default:
|
|
|
826 *u++ = ch;
|
|
|
827 break;
|
|
|
828 }
|
|
|
829 ch = *p++;
|
|
|
830 break;
|
|
|
831
|
|
|
832 case sw_slash:
|
|
|
833 switch(ch) {
|
|
10
|
834 #if (NGX_WIN32)
|
|
|
835 case '\\':
|
|
|
836 #endif
|
|
0
|
837 case '/':
|
|
|
838 break;
|
|
|
839 case '.':
|
|
|
840 state = sw_dot;
|
|
|
841 *u++ = ch;
|
|
|
842 break;
|
|
|
843 case '%':
|
|
|
844 quoted_state = state;
|
|
|
845 state = sw_quoted;
|
|
|
846 break;
|
|
28
|
847 case '?':
|
|
|
848 r->args_start = p;
|
|
|
849 goto done;
|
|
0
|
850 default:
|
|
|
851 state = sw_usual;
|
|
|
852 *u++ = ch;
|
|
|
853 break;
|
|
|
854 }
|
|
|
855 ch = *p++;
|
|
|
856 break;
|
|
|
857
|
|
|
858 case sw_dot:
|
|
|
859 switch(ch) {
|
|
10
|
860 #if (NGX_WIN32)
|
|
|
861 case '\\':
|
|
|
862 #endif
|
|
0
|
863 case '/':
|
|
|
864 state = sw_slash;
|
|
|
865 u--;
|
|
|
866 break;
|
|
|
867 case '.':
|
|
|
868 state = sw_dot_dot;
|
|
|
869 *u++ = ch;
|
|
|
870 break;
|
|
|
871 case '%':
|
|
|
872 quoted_state = state;
|
|
|
873 state = sw_quoted;
|
|
|
874 break;
|
|
28
|
875 case '?':
|
|
|
876 r->args_start = p;
|
|
|
877 goto done;
|
|
0
|
878 default:
|
|
|
879 state = sw_usual;
|
|
|
880 *u++ = ch;
|
|
|
881 break;
|
|
|
882 }
|
|
|
883 ch = *p++;
|
|
|
884 break;
|
|
|
885
|
|
|
886 case sw_dot_dot:
|
|
|
887 switch(ch) {
|
|
10
|
888 #if (NGX_WIN32)
|
|
|
889 case '\\':
|
|
|
890 #endif
|
|
0
|
891 case '/':
|
|
|
892 state = sw_slash;
|
|
|
893 u -= 4;
|
|
|
894 if (u < r->uri.data) {
|
|
|
895 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
896 }
|
|
|
897 while (*(u - 1) != '/') {
|
|
|
898 u--;
|
|
|
899 }
|
|
|
900 break;
|
|
|
901 case '%':
|
|
|
902 quoted_state = state;
|
|
|
903 state = sw_quoted;
|
|
|
904 break;
|
|
28
|
905 case '?':
|
|
|
906 r->args_start = p;
|
|
|
907 goto done;
|
|
10
|
908 #if (NGX_WIN32)
|
|
0
|
909 case '.':
|
|
|
910 state = sw_dot_dot_dot;
|
|
|
911 *u++ = ch;
|
|
|
912 break;
|
|
|
913 #endif
|
|
|
914 default:
|
|
|
915 state = sw_usual;
|
|
|
916 *u++ = ch;
|
|
|
917 break;
|
|
|
918 }
|
|
|
919 ch = *p++;
|
|
|
920 break;
|
|
|
921
|
|
10
|
922 #if (NGX_WIN32)
|
|
0
|
923 case sw_dot_dot_dot:
|
|
|
924 switch(ch) {
|
|
10
|
925 case '\\':
|
|
0
|
926 case '/':
|
|
|
927 state = sw_slash;
|
|
|
928 u -= 5;
|
|
|
929 if (u < r->uri.data) {
|
|
|
930 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
931 }
|
|
|
932 while (*u != '/') {
|
|
|
933 u--;
|
|
|
934 }
|
|
|
935 if (u < r->uri.data) {
|
|
|
936 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
937 }
|
|
|
938 while (*(u - 1) != '/') {
|
|
|
939 u--;
|
|
|
940 }
|
|
|
941 break;
|
|
|
942 case '%':
|
|
|
943 quoted_state = state;
|
|
|
944 state = sw_quoted;
|
|
|
945 break;
|
|
122
|
946 case '?':
|
|
|
947 r->args_start = p;
|
|
|
948 goto done;
|
|
0
|
949 default:
|
|
|
950 state = sw_usual;
|
|
|
951 *u++ = ch;
|
|
|
952 break;
|
|
|
953 }
|
|
|
954 ch = *p++;
|
|
|
955 break;
|
|
|
956 #endif
|
|
|
957
|
|
|
958 case sw_quoted:
|
|
|
959 if (ch >= '0' && ch <= '9') {
|
|
|
960 decoded = (u_char) (ch - '0');
|
|
|
961 state = sw_quoted_second;
|
|
|
962 ch = *p++;
|
|
|
963 break;
|
|
|
964 }
|
|
|
965
|
|
|
966 c = (u_char) (ch | 0x20);
|
|
|
967 if (c >= 'a' && c <= 'f') {
|
|
|
968 decoded = (u_char) (c - 'a' + 10);
|
|
|
969 state = sw_quoted_second;
|
|
|
970 ch = *p++;
|
|
|
971 break;
|
|
|
972 }
|
|
|
973
|
|
|
974 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
975
|
|
|
976 case sw_quoted_second:
|
|
|
977 if (ch >= '0' && ch <= '9') {
|
|
|
978 ch = (u_char) ((decoded << 4) + ch - '0');
|
|
38
|
979
|
|
0
|
980 if (ch == '%') {
|
|
|
981 state = sw_usual;
|
|
|
982 *u++ = ch;
|
|
|
983 ch = *p++;
|
|
|
984 break;
|
|
|
985 }
|
|
38
|
986
|
|
|
987 if (ch == '\0') {
|
|
|
988 r->zero_in_uri = 1;
|
|
|
989 *u++ = ch;
|
|
|
990 ch = *p++;
|
|
|
991 }
|
|
|
992
|
|
0
|
993 state = quoted_state;
|
|
|
994 break;
|
|
|
995 }
|
|
|
996
|
|
|
997 c = (u_char) (ch | 0x20);
|
|
|
998 if (c >= 'a' && c <= 'f') {
|
|
|
999 ch = (u_char) ((decoded << 4) + c - 'a' + 10);
|
|
28
|
1000 if (ch == '?') {
|
|
0
|
1001 *u++ = ch;
|
|
|
1002 ch = *p++;
|
|
|
1003 }
|
|
|
1004 state = quoted_state;
|
|
|
1005 break;
|
|
|
1006 }
|
|
|
1007
|
|
|
1008 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
1009 }
|
|
|
1010 }
|
|
|
1011
|
|
28
|
1012 done:
|
|
|
1013
|
|
0
|
1014 r->uri.len = u - r->uri.data;
|
|
|
1015 r->uri.data[r->uri.len] = '\0';
|
|
|
1016
|
|
|
1017 if (r->uri_ext) {
|
|
|
1018 r->exten.len = u - r->uri_ext;
|
|
10
|
1019 r->exten.data = r->uri_ext;
|
|
0
|
1020 }
|
|
|
1021
|
|
|
1022 r->uri_ext = NULL;
|
|
|
1023
|
|
|
1024 return NGX_OK;
|
|
|
1025 }
|
|
58
|
1026
|
|
|
1027
|
|
|
1028 ngx_int_t
|
|
122
|
1029 ngx_http_parse_unsafe_uri(ngx_http_request_t *r, ngx_str_t *uri,
|
|
|
1030 ngx_str_t *args, ngx_uint_t *flags)
|
|
|
1031 {
|
|
|
1032 u_char ch, *p;
|
|
|
1033 size_t len;
|
|
|
1034
|
|
|
1035 len = uri->len;
|
|
|
1036 p = uri->data;
|
|
|
1037
|
|
|
1038 if (len == 0 || p[0] == '?') {
|
|
|
1039 goto unsafe;
|
|
|
1040 }
|
|
|
1041
|
|
|
1042 if (p[0] == '.' && len == 3 && p[1] == '.' && (p[2] == '/'
|
|
|
1043 #if (NGX_WIN32)
|
|
|
1044 || p[2] == '\\'
|
|
|
1045 #endif
|
|
|
1046 ))
|
|
|
1047 {
|
|
|
1048 goto unsafe;
|
|
|
1049 }
|
|
|
1050
|
|
|
1051 for ( /* void */ ; len; len--) {
|
|
|
1052
|
|
|
1053 ch = *p++;
|
|
|
1054
|
|
|
1055 if (ch == '?') {
|
|
|
1056 args->len = len - 1;
|
|
|
1057 args->data = p;
|
|
|
1058 uri->len -= len;
|
|
|
1059
|
|
|
1060 return NGX_OK;
|
|
|
1061 }
|
|
|
1062
|
|
|
1063 if (ch == '\0') {
|
|
|
1064 *flags |= NGX_HTTP_ZERO_IN_URI;
|
|
|
1065 continue;
|
|
|
1066 }
|
|
|
1067
|
|
|
1068 if (ch != '/'
|
|
|
1069 #if (NGX_WIN32)
|
|
|
1070 && ch != '\\'
|
|
|
1071 #endif
|
|
|
1072 )
|
|
|
1073 {
|
|
|
1074 continue;
|
|
|
1075 }
|
|
|
1076
|
|
|
1077 if (len > 2) {
|
|
|
1078
|
|
|
1079 /* detect "/../" */
|
|
|
1080
|
|
124
|
1081 if (p[0] == '.' && p[1] == '.' && p[2] == '/') {
|
|
122
|
1082 goto unsafe;
|
|
|
1083 }
|
|
|
1084
|
|
|
1085 #if (NGX_WIN32)
|
|
|
1086
|
|
|
1087 if (p[2] == '\\') {
|
|
|
1088 goto unsafe;
|
|
|
1089 }
|
|
|
1090
|
|
|
1091 if (len > 3) {
|
|
|
1092
|
|
|
1093 /* detect "/.../" */
|
|
|
1094
|
|
124
|
1095 if (p[0] == '.' && p[1] == '.' && p[2] == '.'
|
|
|
1096 && (p[3] == '/' || p[3] == '\\'))
|
|
|
1097 {
|
|
122
|
1098 goto unsafe;
|
|
|
1099 }
|
|
|
1100 }
|
|
|
1101 #endif
|
|
|
1102 }
|
|
|
1103 }
|
|
|
1104
|
|
|
1105 return NGX_OK;
|
|
|
1106
|
|
|
1107 unsafe:
|
|
|
1108
|
|
|
1109 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
1110 "unsafe URI \"%V\" was detected", uri);
|
|
|
1111
|
|
|
1112 return NGX_ERROR;
|
|
|
1113 }
|
|
|
1114
|
|
|
1115
|
|
|
1116 ngx_int_t
|
|
58
|
1117 ngx_http_parse_multi_header_lines(ngx_array_t *headers, ngx_str_t *name,
|
|
|
1118 ngx_str_t *value)
|
|
|
1119 {
|
|
|
1120 ngx_uint_t i;
|
|
|
1121 u_char *start, *last, *end, ch;
|
|
|
1122 ngx_table_elt_t **h;
|
|
|
1123
|
|
|
1124 h = headers->elts;
|
|
|
1125
|
|
|
1126 for (i = 0; i < headers->nelts; i++) {
|
|
|
1127
|
|
|
1128 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, headers->pool->log, 0,
|
|
|
1129 "parse header: \"%V: %V\"", &h[i]->key, &h[i]->value);
|
|
|
1130
|
|
|
1131 if (name->len > h[i]->value.len) {
|
|
|
1132 continue;
|
|
|
1133 }
|
|
126
|
1134
|
|
58
|
1135 start = h[i]->value.data;
|
|
|
1136 end = h[i]->value.data + h[i]->value.len;
|
|
|
1137
|
|
|
1138 while (start < end) {
|
|
|
1139
|
|
|
1140 if (ngx_strncasecmp(start, name->data, name->len) != 0) {
|
|
|
1141 goto skip;
|
|
|
1142 }
|
|
|
1143
|
|
|
1144 for (start += name->len; start < end && *start == ' '; start++) {
|
|
|
1145 /* void */
|
|
|
1146 }
|
|
|
1147
|
|
|
1148 if (value == NULL) {
|
|
|
1149 if (start == end || *start == ',') {
|
|
|
1150 return i;
|
|
|
1151 }
|
|
|
1152
|
|
|
1153 goto skip;
|
|
|
1154 }
|
|
|
1155
|
|
|
1156 if (start == end || *start++ != '=') {
|
|
|
1157 /* the invalid header value */
|
|
|
1158 goto skip;
|
|
|
1159 }
|
|
|
1160
|
|
|
1161 while (start < end && *start == ' ') { start++; }
|
|
|
1162
|
|
|
1163 for (last = start; last < end && *last != ';'; last++) {
|
|
|
1164 /* void */
|
|
|
1165 }
|
|
|
1166
|
|
|
1167 value->len = last - start;
|
|
|
1168 value->data = start;
|
|
|
1169
|
|
|
1170 return i;
|
|
|
1171
|
|
|
1172 skip:
|
|
122
|
1173
|
|
58
|
1174 while (start < end) {
|
|
|
1175 ch = *start++;
|
|
|
1176 if (ch == ';' || ch == ',') {
|
|
|
1177 break;
|
|
|
1178 }
|
|
|
1179 }
|
|
|
1180
|
|
|
1181 while (start < end && *start == ' ') { start++; }
|
|
|
1182 }
|
|
|
1183 }
|
|
|
1184
|
|
|
1185 return NGX_DECLINED;
|
|
|
1186 }
|
