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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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31 ngx_int_t ngx_rstrncmp(u_char *s1, u_char *s2, size_t n)
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32 {
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33 if (n == 0) {
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34 return 0;
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35 }
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36
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37 n--;
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38
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39 for ( ;; ) {
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40 if (s1[n] != s2[n]) {
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41 return s1[n] - s2[n];
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42 }
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43
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44 if (n == 0) {
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45 return 0;
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46 }
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47
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48 n--;
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49 }
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50 }
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51
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52
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53 ngx_int_t ngx_atoi(u_char *line, size_t n)
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54 {
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55 ngx_int_t value;
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56
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57 if (n == 0) {
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58 return NGX_ERROR;
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59 }
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60
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61 for (value = 0; n--; line++) {
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62 if (*line < '0' || *line > '9') {
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63 return NGX_ERROR;
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64 }
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65
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66 value = value * 10 + (*line - '0');
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67 }
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68
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69 if (value < 0) {
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70 return NGX_ERROR;
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71
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72 } else {
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73 return value;
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74 }
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75 }
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76
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77
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78 ngx_int_t ngx_hextoi(u_char *line, size_t n)
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79 {
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80 u_char ch;
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81 ngx_int_t value;
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82
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83 if (n == 0) {
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84 return NGX_ERROR;
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85 }
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86
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87 for (value = 0; n--; line++) {
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88 ch = *line;
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89
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90 if (ch >= '0' && ch <= '9') {
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91 value = value * 16 + (ch - '0');
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92 continue;
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93 }
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94
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95 if (ch >= 'A' && ch <= 'F') {
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96 value = value * 16 + (ch - 'A' + 10);
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97 continue;
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98 }
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99
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100 if (ch >= 'a' && ch <= 'f') {
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101 value = value * 16 + (ch - 'a' + 10);
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102 continue;
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103 }
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104
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105 return NGX_ERROR;
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106 }
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107
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108 if (value < 0) {
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109 return NGX_ERROR;
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110
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111 } else {
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112 return value;
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113 }
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114 }
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115
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116
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117 void ngx_md5_text(u_char *text, u_char *md5)
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118 {
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119 int i;
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120 static u_char hex[] = "0123456789abcdef";
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121
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122 for (i = 0; i < 16; i++) {
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123 *text++ = hex[md5[i] >> 4];
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124 *text++ = hex[md5[i] & 0xf];
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125 }
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126
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127 *text = '\0';
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128 }
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129
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130
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2
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131 void ngx_encode_base64(ngx_str_t *dst, ngx_str_t *src)
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0
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132 {
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133 u_char *d, *s;
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134 size_t len;
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135 static u_char basis64[] =
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136 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
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137
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138 len = src->len;
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139 s = src->data;
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140 d = dst->data;
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141
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142 while (len > 2) {
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143 *d++ = basis64[(s[0] >> 2) & 0x3f];
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144 *d++ = basis64[((s[0] & 3) << 4) | (s[1] >> 4)];
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145 *d++ = basis64[((s[1] & 0x0f) << 2) | (s[2] >> 6)];
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146 *d++ = basis64[s[2] & 0x3f];
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147
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148 s += 3;
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149 len -= 3;
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150 }
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151
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152 if (len) {
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153 *d++ = basis64[(s[0] >> 2) & 0x3f];
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154
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155 if (len == 1) {
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156 *d++ = basis64[(s[0] & 3) << 4];
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157 *d++ = '=';
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158
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159 } else {
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160 *d++ = basis64[((s[0] & 3) << 4) | (s[1] >> 4)];
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161 *d++ = basis64[(s[1] & 0x0f) << 2];
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162 }
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163
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164 *d++ = '=';
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165 }
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166
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167 dst->len = d - dst->data;
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168 }
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169
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170
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2
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171 ngx_int_t ngx_decode_base64(ngx_str_t *dst, ngx_str_t *src)
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0
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172 {
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173 size_t len;
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174 u_char *d, *s;
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175 static u_char basis64[] =
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176 { 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
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177 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
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178 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 62, 77, 77, 77, 63,
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179 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 77, 77, 77, 77, 77, 77,
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180 77, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
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181 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 77, 77, 77, 77, 77,
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182 77, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
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183 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 77, 77, 77, 77, 77,
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184
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185 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
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186 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
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187 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
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188 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
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189 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
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190 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
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191 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
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192 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77 };
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193
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194 for (len = 0; len < src->len; len++) {
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195 if (src->data[len] == '=') {
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196 break;
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197 }
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198
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199 if (basis64[src->data[len]] == 77) {
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200 return NGX_ERROR;
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201 }
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202 }
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203
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204 if (len % 4 == 1) {
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205 return NGX_ERROR;
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206 }
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207
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208 s = src->data;
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209 d = dst->data;
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210
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211 while (len > 3) {
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212 *d++ = (u_char) (basis64[s[0]] << 2 | basis64[s[1]] >> 4);
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213 *d++ = (u_char) (basis64[s[1]] << 4 | basis64[s[2]] >> 2);
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214 *d++ = (u_char) (basis64[s[2]] << 6 | basis64[s[3]]);
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215
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216 s += 4;
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217 len -= 4;
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218 }
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219
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220 if (len > 1) {
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221 *d++ = (u_char) (basis64[s[0]] << 2 | basis64[s[1]] >> 4);
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222 }
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223
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224 if (len > 2) {
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225 *d++ = (u_char) (basis64[s[1]] << 4 | basis64[s[2]] >> 2);
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226 }
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227
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228 dst->len = d - dst->data;
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229
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230 return NGX_OK;
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231 }
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232
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233
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2
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234 ngx_int_t ngx_escape_uri(u_char *dst, u_char *src, size_t size)
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0
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235 {
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2
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236 ngx_int_t n;
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237 ngx_uint_t i;
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238 static u_char hex[] = "0123456789abcdef";
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239 static uint32_t escape[] =
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240 { 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
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0
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241
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2
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242 /* ?>=< ;:98 7654 3210 /.-, +*)( '&%$ #"! */
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243 0x80000021, /* 1000 0000 0000 0000 0000 0000 0010 0001 */
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244
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245 /* _^]\ [ZYX WVUT SRQP ONML KJIH GFED CBA@ */
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246 0x00000000, /* 0000 0000 0000 0000 0000 0000 0000 0000 */
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247
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248 /* ~}| {zyx wvut srqp onml kjih gfed cba` */
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249 0x80000000, /* 1000 0000 0000 0000 0000 0000 0000 0000 */
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0
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250
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2
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251 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
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252 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
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253 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
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254 0xffffffff /* 1111 1111 1111 1111 1111 1111 1111 1111 */ };
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255
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256 if (dst == NULL) {
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257
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258 /* find the number of the characters to be escaped */
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0
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259
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2
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260 n = 0;
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261
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262 for (i = 0; i < size; i++) {
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263 if (escape[*src >> 5] & (1 << (*src & 0x1f))) {
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264 n++;
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265 }
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266 src++;
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267 }
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268
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269 return n;
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0
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270 }
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271
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2
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272 for (i = 0; i < size; i++) {
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273 if (escape[*src >> 5] & (1 << (*src & 0x1f))) {
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274 *dst++ = '%';
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275 *dst++ = hex[*src >> 4];
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276 *dst++ = hex[*src & 0xf];
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277 src++;
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0
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278
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2
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279 } else {
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280 *dst++ = *src++;
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281 }
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0
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282 }
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283
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2
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284 return NGX_OK;
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0
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285 }
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