annotate common/strhelp.c @ 1395:a2574a029322

Fix Base 64 signature size calculation. If the signature byte size is not equally dividable by three the base 64 encoding needs three additional bytes. The value is now fixed to avoid such errors in the future.
author Andre Heinecke <andre.heinecke@intevation.de>
date Mon, 26 Jan 2015 13:17:32 +0100
parents ffdc8cba139a
children
rev   line source
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1 /* Copyright (C) 2014 by Bundesamt für Sicherheit in der Informationstechnik
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU GPL (v>=2)
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5 * and comes with ABSOLUTELY NO WARRANTY!
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6 * See LICENSE.txt for details.
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7 */
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8 /* Needed to get asprintf */
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9 #define _GNU_SOURCE 1
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10
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11 #include <ctype.h>
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12 #include <stdarg.h>
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13 #include <stdbool.h>
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14 #include <stdio.h>
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15 #include <stdlib.h>
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16 #include <string.h>
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17 #include <assert.h>
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18
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19 #include <polarssl/base64.h>
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20
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21 #ifdef WIN32
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22 #include <windows.h>
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23 #endif
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24
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25 /* Remarks regarding the "Flawfinder: ignore" comments in this file:
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26 *
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27 * - strlen:
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28 *
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29 * It's true that strlen might crash if input is not null
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30 * terminated. But by design there is not safe way to get the
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31 * length of an string in C, and defining an additional length
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32 * parameter for string parameter will only transfere the problem to
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33 * the caller.
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34 */
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35
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36 static void
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37 out_of_core(void)
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38 {
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39 fputs("\nfatal: out of memory\n", stderr);
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40 exit(2);
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41 }
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42 void *
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43 xmalloc( size_t n )
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44 {
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45 void *p = malloc( n );
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46 if( !p )
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47 out_of_core();
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48 return p;
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49 }
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50
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51 void *
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52 xrealloc( void *a, size_t n )
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53 {
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54 void *p = realloc( a, n );
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55 if( !p )
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56 out_of_core();
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57 return p;
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58 }
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59
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60 char *
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61 xstrndup( const char *string, const size_t len )
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62 {
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63 char *p = xmalloc( len + 1 );
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64 memcpy( p, string, len );
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65 p[len] = '\0';
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66 return p;
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67 }
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68
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69 unsigned int
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70 strv_length (char **str_array)
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71 {
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72 unsigned int i = 0;
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73
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74 if (!str_array)
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75 return 0;
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76
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77 while (str_array[i])
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78 ++i;
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79
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80 return i;
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81 }
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82
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83 void strv_append (char ***pArray, const char *string, const size_t len)
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84 {
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85 unsigned int old_len = 0;
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86
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87 if (!*pArray)
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88 {
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89 *pArray = xmalloc(2 * sizeof(char*));
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90 (*pArray)[0] = xstrndup(string, len);
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91 (*pArray)[1] = NULL;
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92 return;
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93 }
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94 old_len = strv_length(*pArray);
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95 *pArray = xrealloc(*pArray, sizeof(char**) * (old_len + 2));
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96
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97 (*pArray)[old_len] = xstrndup(string, len);
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98 (*pArray)[old_len + 1] = NULL;
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99 }
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100
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101 void
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102 str_append_str(char **pDst, size_t *dst_len, const char *appendage, const size_t len)
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103 {
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104 if (!appendage)
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105 return;
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106
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107 if (!(*pDst))
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108 {
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109 *pDst = xstrndup(appendage, len);
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110 *dst_len = len;
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111 }
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112 else
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113 {
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114 size_t new_size = (*dst_len) + len + 1;
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115 char *p_old = *pDst;
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116 *pDst = xmalloc(new_size);
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117 strncpy(*pDst, p_old, *dst_len);
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118 strncpy(*pDst + *dst_len, appendage, len);
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119 *dst_len = new_size - 1;
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120 (*pDst)[*dst_len] = '\0';
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121 free (p_old);
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122 }
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123 }
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124
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125 void
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126 strv_free (char **str_array)
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127 {
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128 if (str_array)
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129 {
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130 int i;
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131
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132 for (i = 0; str_array[i] != NULL; i++)
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133 free (str_array[i]);
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134
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135 free (str_array);
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136 }
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137 }
131
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138
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139 bool
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140 str_equal (char *s1, char *s2)
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parents: 116
diff changeset
141 {
143
b026e6d2a161 Make flawfinder (a bit more) happy.
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diff changeset
142 size_t l1 = strlen(s1); /* Flawfinder: ignore */
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diff changeset
143 size_t l2 = strlen(s2); /* Flawfinder: ignore */
131
9104b1b2e4da Added string comparison functions.
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diff changeset
144 if ((l1 == l2) &&
136
5fa4791d6d0e Replaced unnecessary strncmp with strcmp.
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parents: 135
diff changeset
145 (strcmp(s1, s2) == 0))
131
9104b1b2e4da Added string comparison functions.
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diff changeset
146 return true;
9104b1b2e4da Added string comparison functions.
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parents: 116
diff changeset
147 else
9104b1b2e4da Added string comparison functions.
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diff changeset
148 return false;
9104b1b2e4da Added string comparison functions.
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parents: 116
diff changeset
149 }
9104b1b2e4da Added string comparison functions.
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parents: 116
diff changeset
150
9104b1b2e4da Added string comparison functions.
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parents: 116
diff changeset
151 bool
9104b1b2e4da Added string comparison functions.
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parents: 116
diff changeset
152 str_starts_with (char *s1, char *s2)
9104b1b2e4da Added string comparison functions.
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parents: 116
diff changeset
153 {
143
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diff changeset
154 size_t l2 = strlen(s2); /* Flawfinder: ignore */
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diff changeset
155 if (strncmp(s1, s2, l2) == 0)
131
9104b1b2e4da Added string comparison functions.
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diff changeset
156 return true;
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parents: 116
diff changeset
157 else
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parents: 116
diff changeset
158 return false;
9104b1b2e4da Added string comparison functions.
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159 }
133
c719d3fdbc15 Added functrion to trim white space from string.
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parents: 131
diff changeset
160
c719d3fdbc15 Added functrion to trim white space from string.
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parents: 131
diff changeset
161 void
c719d3fdbc15 Added functrion to trim white space from string.
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parents: 131
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162 str_trim (char **s)
c719d3fdbc15 Added functrion to trim white space from string.
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parents: 131
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163 {
c719d3fdbc15 Added functrion to trim white space from string.
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164 size_t i;
135
3fb6ddd6b70d str_trim: do nothing if *s is NULL.
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165 if (*s != NULL)
3fb6ddd6b70d str_trim: do nothing if *s is NULL.
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parents: 134
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166 {
3fb6ddd6b70d str_trim: do nothing if *s is NULL.
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diff changeset
167 while (isspace(**s))
3fb6ddd6b70d str_trim: do nothing if *s is NULL.
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diff changeset
168 (*s)++;
143
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diff changeset
169 i = strlen(*s); /* Flawfinder: ignore */
135
3fb6ddd6b70d str_trim: do nothing if *s is NULL.
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170 while (isspace((*s)[--i]))
3fb6ddd6b70d str_trim: do nothing if *s is NULL.
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diff changeset
171 (*s)[i] = '\0';
3fb6ddd6b70d str_trim: do nothing if *s is NULL.
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diff changeset
172 }
133
c719d3fdbc15 Added functrion to trim white space from string.
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parents: 131
diff changeset
173 }
160
bf4bfd8843bd Add memory allocating base64 decode function
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parents: 143
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174
bf4bfd8843bd Add memory allocating base64 decode function
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diff changeset
175 int str_base64_decode(char **dst, size_t *dst_size, char *src,
bf4bfd8843bd Add memory allocating base64 decode function
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176 size_t src_size)
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177 {
905
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178 int ret = -1;
160
bf4bfd8843bd Add memory allocating base64 decode function
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diff changeset
179
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180 if (!dst || *dst)
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181 {
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182 return -1;
160
bf4bfd8843bd Add memory allocating base64 decode function
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parents: 143
diff changeset
183 }
bf4bfd8843bd Add memory allocating base64 decode function
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184
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185 /* Check the needed size for the buffer */
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diff changeset
186 ret = base64_decode(NULL, dst_size,
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187 (unsigned char *)src, src_size);
160
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diff changeset
188
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diff changeset
189 if (ret != 0 && ret != POLARSSL_ERR_BASE64_BUFFER_TOO_SMALL)
698b6a9bd75e Fix coding style for C code
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parents: 404
diff changeset
190 {
698b6a9bd75e Fix coding style for C code
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diff changeset
191 return ret;
160
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diff changeset
192 }
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diff changeset
193
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diff changeset
194 *dst = xmalloc(*dst_size);
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diff changeset
195 memset (*dst, 0, *dst_size);
160
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diff changeset
196
905
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diff changeset
197 ret = base64_decode((unsigned char *)*dst, dst_size,
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diff changeset
198 (unsigned char *)src, src_size);
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diff changeset
199 if (ret)
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parents: 404
diff changeset
200 {
698b6a9bd75e Fix coding style for C code
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parents: 404
diff changeset
201 free (*dst);
698b6a9bd75e Fix coding style for C code
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diff changeset
202 *dst = NULL;
698b6a9bd75e Fix coding style for C code
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diff changeset
203 *dst_size = 0;
160
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diff changeset
204 }
905
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diff changeset
205 return ret;
160
bf4bfd8843bd Add memory allocating base64 decode function
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parents: 143
diff changeset
206 }
251
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
207
c596568fa45b Add utf16 conversion functions for Windows.
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parents: 183
diff changeset
208 void
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Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
209 xfree (void *p)
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Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
210 {
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Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
211 if (p)
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Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
212 free (p);
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Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
213 }
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
214
319
4077eff1dd39 Added terminateing version of asprintf.
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parents: 288
diff changeset
215 int
4077eff1dd39 Added terminateing version of asprintf.
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parents: 288
diff changeset
216 xasprintf (char **strp, const char *fmt, ...)
4077eff1dd39 Added terminateing version of asprintf.
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parents: 288
diff changeset
217 {
4077eff1dd39 Added terminateing version of asprintf.
Sascha Wilde <wilde@intevation.de>
parents: 288
diff changeset
218 int ret;
4077eff1dd39 Added terminateing version of asprintf.
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parents: 288
diff changeset
219 va_list ap;
4077eff1dd39 Added terminateing version of asprintf.
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parents: 288
diff changeset
220 va_start(ap, fmt);
4077eff1dd39 Added terminateing version of asprintf.
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parents: 288
diff changeset
221 ret = vasprintf(strp, fmt, ap);
4077eff1dd39 Added terminateing version of asprintf.
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parents: 288
diff changeset
222 va_end(ap);
4077eff1dd39 Added terminateing version of asprintf.
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parents: 288
diff changeset
223
4077eff1dd39 Added terminateing version of asprintf.
Sascha Wilde <wilde@intevation.de>
parents: 288
diff changeset
224 if (ret == -1)
4077eff1dd39 Added terminateing version of asprintf.
Sascha Wilde <wilde@intevation.de>
parents: 288
diff changeset
225 out_of_core();
4077eff1dd39 Added terminateing version of asprintf.
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parents: 288
diff changeset
226
4077eff1dd39 Added terminateing version of asprintf.
Sascha Wilde <wilde@intevation.de>
parents: 288
diff changeset
227 return ret;
4077eff1dd39 Added terminateing version of asprintf.
Sascha Wilde <wilde@intevation.de>
parents: 288
diff changeset
228 }
4077eff1dd39 Added terminateing version of asprintf.
Sascha Wilde <wilde@intevation.de>
parents: 288
diff changeset
229
251
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
230 #ifdef WIN32
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Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
231 /* Adapted from GPGOL rev. e512053 */
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
232 char *
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
233 wchar_to_utf8 (const wchar_t *string, size_t len)
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
234 {
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
235 int n, ilen;
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
236 char *result;
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
237
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
238 ilen = (int) len;
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
239 if (ilen < 0)
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
240 return NULL;
c596568fa45b Add utf16 conversion functions for Windows.
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parents: 183
diff changeset
241
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
242 /* Note, that CP_UTF8 is not defined in Windows versions earlier
c596568fa45b Add utf16 conversion functions for Windows.
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parents: 183
diff changeset
243 than NT.*/
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Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
244 n = WideCharToMultiByte (CP_UTF8, 0, string, ilen, NULL, 0, NULL, NULL);
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
245 if (n < 0)
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
246 return NULL;
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
247
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
248 result = xmalloc ((size_t)n+1);
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
249 n = WideCharToMultiByte (CP_UTF8, 0, string, ilen, result, n, NULL, NULL);
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
250 if (n < 0)
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
251 {
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
252 xfree (result);
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
253 return NULL;
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
254 }
288
c4a989a0d6cf Ensure that the utf8 string is always 0 terminated.
Andre Heinecke <aheinecke@intevation.de>
parents: 251
diff changeset
255 result[n] = 0;
251
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
256 return result;
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
257 }
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
258
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
259 /* Adapted from GPGOL rev. e512053 */
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
260 wchar_t *
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
261 utf8_to_wchar (const char *string, size_t len)
c596568fa45b Add utf16 conversion functions for Windows.
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parents: 183
diff changeset
262 {
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
263 int n, ilen;
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
264 wchar_t *result;
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
265
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
266 ilen = (int) len;
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
267 if (ilen < 0)
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
268 return NULL;
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
269
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
270 n = MultiByteToWideChar (CP_UTF8, 0, string, ilen, NULL, 0);
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
271 if (n < 0 || n + 1 < 0)
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
272 return NULL;
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
273
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
274 result = xmalloc ((size_t)(n+1) * sizeof *result);
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
275 n = MultiByteToWideChar (CP_UTF8, 0, string, ilen, result, n);
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
276 if (n < 0)
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
277 {
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
278 xfree (result);
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
279 return NULL;
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
280 }
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
281 result[n] = 0;
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
282 return result;
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
283 }
1158
ffdc8cba139a (issue36) Add acp_to_wchar based on utf8_to_wchar
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diff changeset
284
ffdc8cba139a (issue36) Add acp_to_wchar based on utf8_to_wchar
Andre Heinecke <andre.heinecke@intevation.de>
parents: 905
diff changeset
285 wchar_t
ffdc8cba139a (issue36) Add acp_to_wchar based on utf8_to_wchar
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parents: 905
diff changeset
286 *acp_to_wchar (const char *string, size_t len)
ffdc8cba139a (issue36) Add acp_to_wchar based on utf8_to_wchar
Andre Heinecke <andre.heinecke@intevation.de>
parents: 905
diff changeset
287 {
ffdc8cba139a (issue36) Add acp_to_wchar based on utf8_to_wchar
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parents: 905
diff changeset
288 int n, ilen;
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289 wchar_t *result;
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290
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291 ilen = (int) len;
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292 if (ilen < 0)
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293 return NULL;
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294
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295 n = MultiByteToWideChar (CP_ACP, 0, string, ilen, NULL, 0);
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296 if (n < 0 || n + 1 < 0)
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297 return NULL;
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298
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299 result = xmalloc ((size_t)(n+1) * sizeof *result);
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300 n = MultiByteToWideChar (CP_ACP, 0, string, ilen, result, n);
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301 if (n < 0)
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302 {
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303 xfree (result);
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304 return NULL;
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305 }
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306 result[n] = 0;
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307 return result;
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308 }
251
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309 #endif

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