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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
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10
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11 u_char *ngx_cpystrn(u_char *dst, u_char *src, size_t n)
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12 {
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13 if (n == 0) {
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14 return dst;
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15 }
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16
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17 for (/* void */; --n; dst++, src++) {
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18 *dst = *src;
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19
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20 if (*dst == '\0') {
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21 return dst;
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22 }
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23 }
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24
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25 *dst = '\0';
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26
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27 return dst;
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28 }
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29
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30
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4
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31 /*
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32 * supported formats:
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33 * %[0][width]O off_t
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34 * %[0][width]T time_t
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35 * %[0][width]S ssize_t
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36 * %[0][width]uS size_t
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37 * %[0][width]uxS size_t in hex
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38 * %[0][width]l long
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39 * %[0][width]d int
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40 * %[0][width]i ngx_int_t
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41 * %[0][width]ui ngx_uint_t
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42 * %[0][width]uxi ngx_uint_t in hex
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43 * %s null-terminated string
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6
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44 * %c char
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4
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45 * %% %
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46 *
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47 */
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48
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49 u_char *ngx_sprintf(u_char *buf, char *fmt, ...)
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50 {
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51 u_char *p, c, temp[NGX_MAX_INT_LEN];
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52 int d;
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53 long l;
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54 off_t offset;
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55 size_t size, len;
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56 ssize_t ssize;
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57 time_t sec;
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58 va_list arg;
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59 ngx_int_t i;
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60 ngx_uint_t ui, zero, width, sign, hexadecimal;
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61 static u_char hex[] = "0123456789abcdef";
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62
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63 va_start(arg, fmt);
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64
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65 while (*fmt) {
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66 if (*fmt == '%') {
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67
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68 zero = (*++fmt == '0') ? 1 : 0;
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69 width = 0;
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70 sign = 1;
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71 hexadecimal = 0;
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72
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73 p = temp + NGX_MAX_INT_LEN;
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74
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75 while (*fmt >= '0' && *fmt <= '9') {
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76 width = width * 10 + *fmt++ - '0';
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77 }
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78
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79
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80 for ( ;; ) {
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81 switch (*fmt) {
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82
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83 case 'u':
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84 sign = 0;
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85 fmt++;
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86 continue;
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87
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88 case 'x':
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89 hexadecimal = 1;
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90 fmt++;
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91 continue;
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92
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93 default:
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94 break;
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95 }
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96
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97 break;
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98 }
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99
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100
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101 switch (*fmt) {
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102
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103 case 'O':
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104 offset = va_arg(arg, off_t);
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105
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106 if (offset < 0) {
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107 *buf++ = '-';
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108 offset = -offset;
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109 }
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110
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111 do {
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112 *--p = (u_char) (offset % 10 + '0');
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113 } while (offset /= 10);
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114
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115 break;
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116
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117 case 'T':
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118 sec = va_arg(arg, time_t);
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119
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120 if (sec < 0) {
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121 *buf++ = '-';
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122 sec = -sec;
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123 }
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124
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125 do {
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126 *--p = (u_char) (sec % 10 + '0');
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127 } while (sec /= 10);
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128
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129 break;
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130
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131 case 'S':
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132 if (sign) {
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133 ssize = va_arg(arg, ssize_t);
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134
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135 if (ssize < 0) {
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136 *buf++ = '-';
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137 size = (size_t) -ssize;
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138
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139 } else {
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140 size = (size_t) ssize;
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141 }
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142
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143 } else {
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144 size = va_arg(arg, size_t);
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145 }
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146
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147 if (hexadecimal) {
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148 do {
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149 *--p = hex[size & 0xf];
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150 } while (size >>= 4);
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151
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152 } else {
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153 do {
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154 *--p = (u_char) (size % 10 + '0');
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155 } while (size /= 10);
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156 }
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157
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158 break;
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159
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160 case 'l':
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161 l = va_arg(arg, long);
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162
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163 if (l < 0) {
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164 *buf++ = '-';
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165 l = -l;
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166 }
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167
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168 do {
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169 *--p = (u_char) (l % 10 + '0');
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170 } while (l /= 10);
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171
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172 break;
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173
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174 case 'd':
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175 d = va_arg(arg, int);
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176
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177 if (d < 0) {
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178 *buf++ = '-';
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179 d = -d;
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180 }
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181
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182 do {
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183 *--p = (u_char) (d % 10 + '0');
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184 } while (d /= 10);
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185
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186 break;
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187
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188 case 'i':
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189 if (sign) {
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190 i = va_arg(arg, ngx_int_t);
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191
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192 if (i < 0) {
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193 *buf++ = '-';
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194 ui = (ngx_uint_t) -i;
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195
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196 } else {
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197 ui = (ngx_uint_t) i;
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198 }
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199
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200 } else {
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201 ui = va_arg(arg, ngx_uint_t);
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202 }
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203
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204 if (hexadecimal) {
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205 do {
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206 *--p = hex[ui & 0xf];
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207 } while (ui >>= 4);
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208
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209 } else {
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210 do {
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211 *--p = (u_char) (ui % 10 + '0');
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212 } while (ui /= 10);
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213 }
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214
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215 break;
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216
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217 case 's':
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218 p = va_arg(arg, u_char *);
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219
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220 while (*p) {
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221 *buf++ = *p++;
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222 }
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223 fmt++;
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224
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225 continue;
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226
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6
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227 case 'c':
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228 d = va_arg(arg, int);
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229 *buf++ = (u_char) (d & 0xff);
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230 fmt++;
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231
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232 continue;
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233
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4
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234 case '%':
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235 *buf++ = '%';
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236 fmt++;
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237
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238 continue;
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239
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240 default:
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241 *buf++ = *fmt++;
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242
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243 continue;
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244 }
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245
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246 len = (temp + NGX_MAX_INT_LEN) - p;
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247
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248 c = (u_char) (zero ? '0' : ' ');
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249
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250 while (len++ < width) {
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251 *buf++ = c;
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252 }
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253
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254 buf = ngx_cpymem(buf, p, ((temp + NGX_MAX_INT_LEN) - p));
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255
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256 fmt++;
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257
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258 } else {
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259 *buf++ = *fmt++;
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260 }
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261 }
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262
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263 va_end(arg);
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264
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265 *buf = '\0';
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266
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267 return buf;
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268 }
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269
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270
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0
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271 ngx_int_t ngx_rstrncmp(u_char *s1, u_char *s2, size_t n)
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272 {
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273 if (n == 0) {
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274 return 0;
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275 }
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276
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277 n--;
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278
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279 for ( ;; ) {
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280 if (s1[n] != s2[n]) {
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281 return s1[n] - s2[n];
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282 }
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283
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284 if (n == 0) {
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285 return 0;
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286 }
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287
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288 n--;
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289 }
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290 }
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291
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292
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4
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293 ngx_int_t ngx_rstrncasecmp(u_char *s1, u_char *s2, size_t n)
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294 {
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295 u_char c1, c2;
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296
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297 if (n == 0) {
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298 return 0;
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299 }
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300
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301 n--;
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302
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303 for ( ;; ) {
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304 c1 = s1[n];
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305 if (c1 >= 'a' && c1 <= 'z') {
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306 c1 -= 'a' - 'A';
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307 }
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308
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309 c2 = s2[n];
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310 if (c2 >= 'a' && c2 <= 'z') {
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311 c2 -= 'a' - 'A';
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312 }
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313
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314 if (c1 != c2) {
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315 return c1 - c2;
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316 }
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317
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318 if (n == 0) {
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319 return 0;
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320 }
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321
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322 n--;
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323 }
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324 }
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325
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326
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0
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327 ngx_int_t ngx_atoi(u_char *line, size_t n)
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328 {
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329 ngx_int_t value;
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330
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331 if (n == 0) {
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332 return NGX_ERROR;
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333 }
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334
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335 for (value = 0; n--; line++) {
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336 if (*line < '0' || *line > '9') {
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337 return NGX_ERROR;
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338 }
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339
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340 value = value * 10 + (*line - '0');
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341 }
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342
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343 if (value < 0) {
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344 return NGX_ERROR;
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345
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346 } else {
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347 return value;
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348 }
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349 }
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350
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351
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352 ngx_int_t ngx_hextoi(u_char *line, size_t n)
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353 {
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354 u_char ch;
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355 ngx_int_t value;
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356
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357 if (n == 0) {
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358 return NGX_ERROR;
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359 }
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360
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361 for (value = 0; n--; line++) {
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362 ch = *line;
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363
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364 if (ch >= '0' && ch <= '9') {
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365 value = value * 16 + (ch - '0');
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366 continue;
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367 }
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368
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369 if (ch >= 'A' && ch <= 'F') {
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370 value = value * 16 + (ch - 'A' + 10);
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371 continue;
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372 }
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373
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374 if (ch >= 'a' && ch <= 'f') {
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375 value = value * 16 + (ch - 'a' + 10);
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376 continue;
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377 }
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378
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379 return NGX_ERROR;
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380 }
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381
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382 if (value < 0) {
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383 return NGX_ERROR;
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384
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385 } else {
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386 return value;
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387 }
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388 }
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389
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390
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391 void ngx_md5_text(u_char *text, u_char *md5)
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392 {
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393 int i;
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394 static u_char hex[] = "0123456789abcdef";
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395
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396 for (i = 0; i < 16; i++) {
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397 *text++ = hex[md5[i] >> 4];
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398 *text++ = hex[md5[i] & 0xf];
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399 }
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400
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401 *text = '\0';
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402 }
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403
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404
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2
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405 void ngx_encode_base64(ngx_str_t *dst, ngx_str_t *src)
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0
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406 {
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407 u_char *d, *s;
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408 size_t len;
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409 static u_char basis64[] =
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410 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
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411
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412 len = src->len;
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413 s = src->data;
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414 d = dst->data;
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415
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416 while (len > 2) {
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417 *d++ = basis64[(s[0] >> 2) & 0x3f];
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418 *d++ = basis64[((s[0] & 3) << 4) | (s[1] >> 4)];
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419 *d++ = basis64[((s[1] & 0x0f) << 2) | (s[2] >> 6)];
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420 *d++ = basis64[s[2] & 0x3f];
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421
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422 s += 3;
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423 len -= 3;
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424 }
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425
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426 if (len) {
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427 *d++ = basis64[(s[0] >> 2) & 0x3f];
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428
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429 if (len == 1) {
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430 *d++ = basis64[(s[0] & 3) << 4];
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431 *d++ = '=';
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432
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433 } else {
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434 *d++ = basis64[((s[0] & 3) << 4) | (s[1] >> 4)];
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435 *d++ = basis64[(s[1] & 0x0f) << 2];
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436 }
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437
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438 *d++ = '=';
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439 }
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440
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441 dst->len = d - dst->data;
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442 }
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443
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444
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2
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445 ngx_int_t ngx_decode_base64(ngx_str_t *dst, ngx_str_t *src)
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0
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446 {
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447 size_t len;
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448 u_char *d, *s;
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|
449 static u_char basis64[] =
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450 { 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
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451 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
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452 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 62, 77, 77, 77, 63,
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453 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 77, 77, 77, 77, 77, 77,
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454 77, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
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455 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 77, 77, 77, 77, 77,
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456 77, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
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457 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 77, 77, 77, 77, 77,
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458
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459 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
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460 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
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461 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
|
|
|
462 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
|
|
|
463 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
|
|
|
464 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
|
|
|
465 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
|
|
|
466 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77 };
|
|
|
467
|
|
|
468 for (len = 0; len < src->len; len++) {
|
|
|
469 if (src->data[len] == '=') {
|
|
|
470 break;
|
|
|
471 }
|
|
|
472
|
|
|
473 if (basis64[src->data[len]] == 77) {
|
|
|
474 return NGX_ERROR;
|
|
|
475 }
|
|
|
476 }
|
|
|
477
|
|
|
478 if (len % 4 == 1) {
|
|
|
479 return NGX_ERROR;
|
|
|
480 }
|
|
|
481
|
|
|
482 s = src->data;
|
|
|
483 d = dst->data;
|
|
|
484
|
|
|
485 while (len > 3) {
|
|
|
486 *d++ = (u_char) (basis64[s[0]] << 2 | basis64[s[1]] >> 4);
|
|
|
487 *d++ = (u_char) (basis64[s[1]] << 4 | basis64[s[2]] >> 2);
|
|
|
488 *d++ = (u_char) (basis64[s[2]] << 6 | basis64[s[3]]);
|
|
|
489
|
|
|
490 s += 4;
|
|
|
491 len -= 4;
|
|
|
492 }
|
|
|
493
|
|
|
494 if (len > 1) {
|
|
|
495 *d++ = (u_char) (basis64[s[0]] << 2 | basis64[s[1]] >> 4);
|
|
|
496 }
|
|
|
497
|
|
|
498 if (len > 2) {
|
|
|
499 *d++ = (u_char) (basis64[s[1]] << 4 | basis64[s[2]] >> 2);
|
|
|
500 }
|
|
|
501
|
|
|
502 dst->len = d - dst->data;
|
|
|
503
|
|
|
504 return NGX_OK;
|
|
|
505 }
|
|
|
506
|
|
|
507
|
|
2
|
508 ngx_int_t ngx_escape_uri(u_char *dst, u_char *src, size_t size)
|
|
0
|
509 {
|
|
2
|
510 ngx_int_t n;
|
|
|
511 ngx_uint_t i;
|
|
|
512 static u_char hex[] = "0123456789abcdef";
|
|
|
513 static uint32_t escape[] =
|
|
|
514 { 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
|
|
0
|
515
|
|
2
|
516 /* ?>=< ;:98 7654 3210 /.-, +*)( '&%$ #"! */
|
|
|
517 0x80000021, /* 1000 0000 0000 0000 0000 0000 0010 0001 */
|
|
|
518
|
|
|
519 /* _^]\ [ZYX WVUT SRQP ONML KJIH GFED CBA@ */
|
|
|
520 0x00000000, /* 0000 0000 0000 0000 0000 0000 0000 0000 */
|
|
|
521
|
|
|
522 /* ~}| {zyx wvut srqp onml kjih gfed cba` */
|
|
|
523 0x80000000, /* 1000 0000 0000 0000 0000 0000 0000 0000 */
|
|
0
|
524
|
|
2
|
525 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
|
|
|
526 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
|
|
|
527 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
|
|
|
528 0xffffffff /* 1111 1111 1111 1111 1111 1111 1111 1111 */ };
|
|
|
529
|
|
|
530 if (dst == NULL) {
|
|
|
531
|
|
|
532 /* find the number of the characters to be escaped */
|
|
0
|
533
|
|
2
|
534 n = 0;
|
|
|
535
|
|
|
536 for (i = 0; i < size; i++) {
|
|
|
537 if (escape[*src >> 5] & (1 << (*src & 0x1f))) {
|
|
|
538 n++;
|
|
|
539 }
|
|
|
540 src++;
|
|
|
541 }
|
|
|
542
|
|
|
543 return n;
|
|
0
|
544 }
|
|
|
545
|
|
2
|
546 for (i = 0; i < size; i++) {
|
|
|
547 if (escape[*src >> 5] & (1 << (*src & 0x1f))) {
|
|
|
548 *dst++ = '%';
|
|
|
549 *dst++ = hex[*src >> 4];
|
|
|
550 *dst++ = hex[*src & 0xf];
|
|
|
551 src++;
|
|
0
|
552
|
|
2
|
553 } else {
|
|
|
554 *dst++ = *src++;
|
|
|
555 }
|
|
0
|
556 }
|
|
|
557
|
|
2
|
558 return NGX_OK;
|
|
0
|
559 }
|
