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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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10
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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][u][x|X]z ssize_t/size_t
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36 * %[0][width][u][x|X]d int/u_int
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37 * %[0][width][u][x|X]l long
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38 * %[0][width|m][u][x|X]i ngx_int_t/ngx_uint_t
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39 * %[0][width][u][x|X]D int32_t/uint32_t
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40 * %[0][width][u][x|X]L int64_t/uint64_t
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41 * %P ngx_pid_t
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42 * %r rlim_t
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43 * %p pointer
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44 * %V pointer to ngx_str_t
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45 * %s null-terminated string
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46 * %Z '\0'
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47 * %c char
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48 * %% %
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4
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49 *
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10
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50 * TODO:
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51 * %M ngx_msec_t
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52 * %A ngx_atomic_t
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53 *
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54 * reserved:
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55 * %t ptrdiff_t
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56 * %S null-teminated wchar string
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57 * %C wchar
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4
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58 */
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59
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10
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60
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61 u_char *ngx_sprintf(u_char *buf, const char *fmt, ...)
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62 {
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63 u_char *p;
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64 va_list args;
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65
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66 va_start(args, fmt);
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67 p = ngx_vsnprintf(buf, /* STUB */ 65536, fmt, args);
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68 va_end(args);
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69
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70 return p;
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71 }
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72
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73
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74 u_char *ngx_snprintf(u_char *buf, size_t max, const char *fmt, ...)
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4
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75 {
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10
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76 u_char *p;
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77 va_list args;
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78
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79 va_start(args, fmt);
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80 p = ngx_vsnprintf(buf, max, fmt, args);
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81 va_end(args);
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82
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83 return p;
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84 }
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85
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4
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86
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10
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87 u_char *ngx_vsnprintf(u_char *buf, size_t max, const char *fmt, va_list args)
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88 {
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89 u_char *p, zero, *last, temp[NGX_MAX_INT_LEN];
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90 int d;
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91 size_t len;
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92 uint32_t ui32;
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93 int64_t i64;
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94 uint64_t ui64;
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95 ngx_str_t *s;
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96 ngx_uint_t width, sign, hexadecimal;
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97 static u_char hex[] = "0123456789abcdef";
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98 static u_char HEX[] = "0123456789ABCDEF";
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4
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99
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10
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100 if (max == 0) {
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101 return buf;
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102 }
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103
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104 last = buf + max;
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105
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106 while (*fmt && buf < last) {
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107
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108 /*
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109 * "buf < last" means that we could copy at least one character:
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110 * the plain character, "%%", "%c", and minus without the checking
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111 */
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112
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4
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113 if (*fmt == '%') {
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114
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10
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115 i64 = 0;
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116 ui64 = 0;
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117
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118 zero = (u_char) ((*++fmt == '0') ? '0' : ' ');
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4
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119 width = 0;
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120 sign = 1;
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121 hexadecimal = 0;
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122
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123 p = temp + NGX_MAX_INT_LEN;
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124
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125 while (*fmt >= '0' && *fmt <= '9') {
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126 width = width * 10 + *fmt++ - '0';
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127 }
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128
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129
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130 for ( ;; ) {
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131 switch (*fmt) {
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132
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133 case 'u':
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134 sign = 0;
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135 fmt++;
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136 continue;
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137
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10
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138 case 'X':
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139 hexadecimal = 2;
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140 sign = 0;
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141 fmt++;
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142 continue;
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143
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4
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144 case 'x':
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145 hexadecimal = 1;
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10
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146 sign = 0;
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4
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147 fmt++;
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148 continue;
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149
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150 default:
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151 break;
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152 }
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153
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154 break;
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155 }
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156
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157
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158 switch (*fmt) {
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159
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10
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160 case 'V':
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161 s = va_arg(args, ngx_str_t *);
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4
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162
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10
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163 len = (buf + s->len < last) ? s->len : (size_t) (last - buf);
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164 buf = ngx_cpymem(buf, s->data, len);
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165 fmt++;
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4
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166
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10
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167 continue;
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4
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168
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169 case 's':
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10
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170 p = va_arg(args, u_char *);
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4
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171
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10
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172 while (*p && buf < last) {
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4
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173 *buf++ = *p++;
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174 }
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175 fmt++;
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176
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177 continue;
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178
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10
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179 case 'O':
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180 i64 = (int64_t) va_arg(args, off_t);
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181 sign = 1;
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182 break;
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183
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184 case 'P':
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185 i64 = (int64_t) va_arg(args, ngx_pid_t);
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186 sign = 1;
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187 break;
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188
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189 case 'T':
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190 i64 = (int64_t) va_arg(args, time_t);
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191 sign = 1;
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192 break;
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193
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194 case 'z':
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195 if (sign) {
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196 i64 = (int64_t) va_arg(args, ssize_t);
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197 } else {
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198 ui64 = (uint64_t) va_arg(args, size_t);
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199 }
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200 break;
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201
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202 case 'i':
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203 if (sign) {
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204 i64 = (int64_t) va_arg(args, ngx_int_t);
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205 } else {
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206 ui64 = (uint64_t) va_arg(args, ngx_uint_t);
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207 }
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208 break;
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209
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210 case 'd':
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211 if (sign) {
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212 i64 = (int64_t) va_arg(args, int);
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213 } else {
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214 ui64 = (uint64_t) va_arg(args, u_int);
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215 }
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216 break;
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217
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218 case 'l':
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219 if (sign) {
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220 i64 = (int64_t) va_arg(args, long);
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221 } else {
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222 ui64 = (uint64_t) va_arg(args, u_long);
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223 }
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224 break;
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225
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226 case 'D':
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227 if (sign) {
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228 i64 = (int64_t) va_arg(args, int32_t);
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229 } else {
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230 ui64 = (uint64_t) va_arg(args, uint32_t);
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231 }
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232 break;
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233
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234 case 'L':
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235 if (sign) {
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236 i64 = va_arg(args, int64_t);
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237 } else {
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238 ui64 = va_arg(args, uint64_t);
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239 }
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240 break;
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241
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242 #if !(NGX_WIN32)
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243 case 'r':
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244 i64 = (int64_t) va_arg(args, rlim_t);
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245 sign = 1;
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246 break;
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247 #endif
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248
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249 case 'p':
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250 ui64 = (uintptr_t) va_arg(args, void *);
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251 hexadecimal = 2;
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252 sign = 0;
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253 zero = '0';
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254 width = 8;
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255 break;
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256
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6
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257 case 'c':
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10
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258 d = va_arg(args, int);
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6
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259 *buf++ = (u_char) (d & 0xff);
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260 fmt++;
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261
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262 continue;
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263
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10
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264 case 'Z':
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265 *buf++ = '\0';
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266 fmt++;
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267
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268 continue;
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269
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4
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270 case '%':
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271 *buf++ = '%';
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272 fmt++;
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273
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274 continue;
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275
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276 default:
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277 *buf++ = *fmt++;
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278
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279 continue;
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280 }
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281
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10
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282 if (sign) {
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283 if (i64 < 0) {
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284 *buf++ = '-';
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285 ui64 = (uint64_t) -i64;
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286
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287 } else {
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288 ui64 = (uint64_t) i64;
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289 }
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290 }
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291
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292 if (hexadecimal == 1) {
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293 do {
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294
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295 /* the "(uint32_t)" cast disables the BCC's warning */
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296 *--p = hex[(uint32_t) (ui64 & 0xf)];
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297
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298 } while (ui64 >>= 4);
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299
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300 } else if (hexadecimal == 2) {
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301 do {
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302
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303 /* the "(uint32_t)" cast disables the BCC's warning */
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304 *--p = HEX[(uint32_t) (ui64 & 0xf)];
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305
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306 } while (ui64 >>= 4);
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307
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308 } else if (ui64 <= NGX_MAX_UINT32_VALUE) {
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309
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310 /*
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311 * To divide 64-bit number and to find the remainder
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312 * on the x86 platform gcc and icc call the libc functions
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313 * [u]divdi3() and [u]moddi3(), they call another function
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314 * in return. On FreeBSD it is the qdivrem() function,
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315 * its source code is about 170 lines of the code.
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316 * The glibc counterpart is about 150 lines of the code.
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317 *
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318 * For 32-bit numbers gcc and icc use the inlined
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319 * multiplication and shifts. For example, unsigned
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320 * "i32 / 10" is compiled to "(i32 * 0xCCCCCCCD) >> 35".
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321 */
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322
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323 ui32 = (uint32_t) ui64;
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324
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325 do {
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326 *--p = (u_char) (ui32 % 10 + '0');
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327 } while (ui32 /= 10);
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328
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329 } else {
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330 do {
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331 *--p = (u_char) (ui64 % 10 + '0');
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332 } while (ui64 /= 10);
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333 }
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334
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4
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335 len = (temp + NGX_MAX_INT_LEN) - p;
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336
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10
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337 while (len++ < width && buf < last) {
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338 *buf++ = zero;
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4
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339 }
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340
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10
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341 len = (temp + NGX_MAX_INT_LEN) - p;
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342 if (buf + len > last) {
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343 len = last - buf;
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344 }
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345
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346 buf = ngx_cpymem(buf, p, len);
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4
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347
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348 fmt++;
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349
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350 } else {
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351 *buf++ = *fmt++;
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352 }
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353 }
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354
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355 return buf;
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356 }
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357
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358
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0
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359 ngx_int_t ngx_rstrncmp(u_char *s1, u_char *s2, size_t n)
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360 {
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361 if (n == 0) {
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362 return 0;
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363 }
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364
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365 n--;
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366
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367 for ( ;; ) {
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368 if (s1[n] != s2[n]) {
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369 return s1[n] - s2[n];
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370 }
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371
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372 if (n == 0) {
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373 return 0;
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374 }
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375
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376 n--;
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377 }
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378 }
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379
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380
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4
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381 ngx_int_t ngx_rstrncasecmp(u_char *s1, u_char *s2, size_t n)
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382 {
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383 u_char c1, c2;
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384
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385 if (n == 0) {
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386 return 0;
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387 }
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388
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389 n--;
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390
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391 for ( ;; ) {
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392 c1 = s1[n];
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393 if (c1 >= 'a' && c1 <= 'z') {
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394 c1 -= 'a' - 'A';
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395 }
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396
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397 c2 = s2[n];
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398 if (c2 >= 'a' && c2 <= 'z') {
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399 c2 -= 'a' - 'A';
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400 }
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401
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402 if (c1 != c2) {
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403 return c1 - c2;
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404 }
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405
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406 if (n == 0) {
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407 return 0;
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408 }
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409
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410 n--;
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411 }
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412 }
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413
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414
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0
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415 ngx_int_t ngx_atoi(u_char *line, size_t n)
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416 {
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417 ngx_int_t value;
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418
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419 if (n == 0) {
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420 return NGX_ERROR;
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421 }
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422
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423 for (value = 0; n--; line++) {
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424 if (*line < '0' || *line > '9') {
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425 return NGX_ERROR;
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426 }
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427
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428 value = value * 10 + (*line - '0');
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429 }
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430
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431 if (value < 0) {
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432 return NGX_ERROR;
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433
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434 } else {
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435 return value;
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436 }
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437 }
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438
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439
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440 ngx_int_t ngx_hextoi(u_char *line, size_t n)
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441 {
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442 u_char ch;
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443 ngx_int_t value;
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444
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445 if (n == 0) {
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446 return NGX_ERROR;
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447 }
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448
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449 for (value = 0; n--; line++) {
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450 ch = *line;
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451
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452 if (ch >= '0' && ch <= '9') {
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453 value = value * 16 + (ch - '0');
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454 continue;
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455 }
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456
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457 if (ch >= 'A' && ch <= 'F') {
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458 value = value * 16 + (ch - 'A' + 10);
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|
|
459 continue;
|
|
|
460 }
|
|
|
461
|
|
|
462 if (ch >= 'a' && ch <= 'f') {
|
|
|
463 value = value * 16 + (ch - 'a' + 10);
|
|
|
464 continue;
|
|
|
465 }
|
|
|
466
|
|
|
467 return NGX_ERROR;
|
|
|
468 }
|
|
|
469
|
|
|
470 if (value < 0) {
|
|
|
471 return NGX_ERROR;
|
|
|
472
|
|
|
473 } else {
|
|
|
474 return value;
|
|
|
475 }
|
|
|
476 }
|
|
|
477
|
|
|
478
|
|
|
479 void ngx_md5_text(u_char *text, u_char *md5)
|
|
|
480 {
|
|
|
481 int i;
|
|
|
482 static u_char hex[] = "0123456789abcdef";
|
|
|
483
|
|
|
484 for (i = 0; i < 16; i++) {
|
|
|
485 *text++ = hex[md5[i] >> 4];
|
|
|
486 *text++ = hex[md5[i] & 0xf];
|
|
|
487 }
|
|
|
488
|
|
|
489 *text = '\0';
|
|
|
490 }
|
|
|
491
|
|
|
492
|
|
2
|
493 void ngx_encode_base64(ngx_str_t *dst, ngx_str_t *src)
|
|
0
|
494 {
|
|
|
495 u_char *d, *s;
|
|
|
496 size_t len;
|
|
|
497 static u_char basis64[] =
|
|
|
498 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
|
|
|
499
|
|
|
500 len = src->len;
|
|
|
501 s = src->data;
|
|
|
502 d = dst->data;
|
|
|
503
|
|
|
504 while (len > 2) {
|
|
|
505 *d++ = basis64[(s[0] >> 2) & 0x3f];
|
|
|
506 *d++ = basis64[((s[0] & 3) << 4) | (s[1] >> 4)];
|
|
|
507 *d++ = basis64[((s[1] & 0x0f) << 2) | (s[2] >> 6)];
|
|
|
508 *d++ = basis64[s[2] & 0x3f];
|
|
|
509
|
|
|
510 s += 3;
|
|
|
511 len -= 3;
|
|
|
512 }
|
|
|
513
|
|
|
514 if (len) {
|
|
|
515 *d++ = basis64[(s[0] >> 2) & 0x3f];
|
|
|
516
|
|
|
517 if (len == 1) {
|
|
|
518 *d++ = basis64[(s[0] & 3) << 4];
|
|
|
519 *d++ = '=';
|
|
|
520
|
|
|
521 } else {
|
|
|
522 *d++ = basis64[((s[0] & 3) << 4) | (s[1] >> 4)];
|
|
|
523 *d++ = basis64[(s[1] & 0x0f) << 2];
|
|
|
524 }
|
|
|
525
|
|
|
526 *d++ = '=';
|
|
|
527 }
|
|
|
528
|
|
|
529 dst->len = d - dst->data;
|
|
|
530 }
|
|
|
531
|
|
|
532
|
|
2
|
533 ngx_int_t ngx_decode_base64(ngx_str_t *dst, ngx_str_t *src)
|
|
0
|
534 {
|
|
|
535 size_t len;
|
|
|
536 u_char *d, *s;
|
|
|
537 static u_char basis64[] =
|
|
|
538 { 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
|
|
|
539 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
|
|
|
540 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 62, 77, 77, 77, 63,
|
|
|
541 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 77, 77, 77, 77, 77, 77,
|
|
|
542 77, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
|
|
|
543 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 77, 77, 77, 77, 77,
|
|
|
544 77, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
|
|
|
545 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 77, 77, 77, 77, 77,
|
|
|
546
|
|
|
547 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
|
|
|
548 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
|
|
|
549 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
|
|
|
550 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
|
|
|
551 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
|
|
|
552 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
|
|
|
553 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77,
|
|
|
554 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77 };
|
|
|
555
|
|
|
556 for (len = 0; len < src->len; len++) {
|
|
|
557 if (src->data[len] == '=') {
|
|
|
558 break;
|
|
|
559 }
|
|
|
560
|
|
|
561 if (basis64[src->data[len]] == 77) {
|
|
|
562 return NGX_ERROR;
|
|
|
563 }
|
|
|
564 }
|
|
|
565
|
|
|
566 if (len % 4 == 1) {
|
|
|
567 return NGX_ERROR;
|
|
|
568 }
|
|
|
569
|
|
|
570 s = src->data;
|
|
|
571 d = dst->data;
|
|
|
572
|
|
|
573 while (len > 3) {
|
|
|
574 *d++ = (u_char) (basis64[s[0]] << 2 | basis64[s[1]] >> 4);
|
|
|
575 *d++ = (u_char) (basis64[s[1]] << 4 | basis64[s[2]] >> 2);
|
|
|
576 *d++ = (u_char) (basis64[s[2]] << 6 | basis64[s[3]]);
|
|
|
577
|
|
|
578 s += 4;
|
|
|
579 len -= 4;
|
|
|
580 }
|
|
|
581
|
|
|
582 if (len > 1) {
|
|
|
583 *d++ = (u_char) (basis64[s[0]] << 2 | basis64[s[1]] >> 4);
|
|
|
584 }
|
|
|
585
|
|
|
586 if (len > 2) {
|
|
|
587 *d++ = (u_char) (basis64[s[1]] << 4 | basis64[s[2]] >> 2);
|
|
|
588 }
|
|
|
589
|
|
|
590 dst->len = d - dst->data;
|
|
|
591
|
|
|
592 return NGX_OK;
|
|
|
593 }
|
|
|
594
|
|
|
595
|
|
10
|
596 ngx_uint_t ngx_escape_uri(u_char *dst, u_char *src, size_t size,
|
|
|
597 ngx_uint_t type)
|
|
0
|
598 {
|
|
10
|
599 ngx_uint_t i, n;
|
|
|
600 uint32_t *escape;
|
|
2
|
601 static u_char hex[] = "0123456789abcdef";
|
|
10
|
602
|
|
|
603 static uint32_t uri[] =
|
|
2
|
604 { 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
|
|
0
|
605
|
|
2
|
606 /* ?>=< ;:98 7654 3210 /.-, +*)( '&%$ #"! */
|
|
|
607 0x80000021, /* 1000 0000 0000 0000 0000 0000 0010 0001 */
|
|
|
608
|
|
|
609 /* _^]\ [ZYX WVUT SRQP ONML KJIH GFED CBA@ */
|
|
|
610 0x00000000, /* 0000 0000 0000 0000 0000 0000 0000 0000 */
|
|
|
611
|
|
|
612 /* ~}| {zyx wvut srqp onml kjih gfed cba` */
|
|
|
613 0x80000000, /* 1000 0000 0000 0000 0000 0000 0000 0000 */
|
|
0
|
614
|
|
2
|
615 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
|
|
|
616 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
|
|
|
617 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
|
|
|
618 0xffffffff /* 1111 1111 1111 1111 1111 1111 1111 1111 */ };
|
|
|
619
|
|
10
|
620 static uint32_t html[] =
|
|
|
621 { 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
|
|
|
622
|
|
|
623 /* ?>=< ;:98 7654 3210 /.-, +*)( '&%$ #"! */
|
|
|
624 0x80000021, /* 0000 0000 0000 0000 0000 0000 1010 0101 */
|
|
|
625
|
|
|
626 /* _^]\ [ZYX WVUT SRQP ONML KJIH GFED CBA@ */
|
|
|
627 0x00000000, /* 0000 0000 0000 0000 0000 0000 0000 0000 */
|
|
|
628
|
|
|
629 /* ~}| {zyx wvut srqp onml kjih gfed cba` */
|
|
|
630 0x80000000, /* 1000 0000 0000 0000 0000 0000 0000 0000 */
|
|
|
631
|
|
|
632 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
|
|
|
633 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
|
|
|
634 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
|
|
|
635 0xffffffff /* 1111 1111 1111 1111 1111 1111 1111 1111 */ };
|
|
|
636
|
|
|
637
|
|
|
638 if (type == NGX_ESCAPE_HTML) {
|
|
|
639 escape = html;
|
|
|
640
|
|
|
641 } else {
|
|
|
642 escape = uri;
|
|
|
643 }
|
|
|
644
|
|
2
|
645 if (dst == NULL) {
|
|
|
646
|
|
|
647 /* find the number of the characters to be escaped */
|
|
0
|
648
|
|
2
|
649 n = 0;
|
|
|
650
|
|
|
651 for (i = 0; i < size; i++) {
|
|
|
652 if (escape[*src >> 5] & (1 << (*src & 0x1f))) {
|
|
|
653 n++;
|
|
|
654 }
|
|
|
655 src++;
|
|
|
656 }
|
|
|
657
|
|
|
658 return n;
|
|
0
|
659 }
|
|
|
660
|
|
2
|
661 for (i = 0; i < size; i++) {
|
|
|
662 if (escape[*src >> 5] & (1 << (*src & 0x1f))) {
|
|
|
663 *dst++ = '%';
|
|
|
664 *dst++ = hex[*src >> 4];
|
|
|
665 *dst++ = hex[*src & 0xf];
|
|
|
666 src++;
|
|
0
|
667
|
|
2
|
668 } else {
|
|
|
669 *dst++ = *src++;
|
|
|
670 }
|
|
0
|
671 }
|
|
|
672
|
|
10
|
673 return 0;
|
|
0
|
674 }
|
