Mercurial > trustbridge > nss-cmake-static

annotate nss/lib/util/secasn1t.h @ 3:150b72113545

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Add DBM and legacydb support
author Andre Heinecke <andre.heinecke@intevation.de>
date Tue, 05 Aug 2014 18:32:02 +0200
parents 1e5118fa0cb1
children
rev   line source
0
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1 /* This Source Code Form is subject to the terms of the Mozilla Public
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2 * License, v. 2.0. If a copy of the MPL was not distributed with this
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3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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4
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5 /*
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6 * Types for encoding/decoding of ASN.1 using BER/DER (Basic/Distinguished
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7 * Encoding Rules).
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8 */
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9
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10 #ifndef _SECASN1T_H_
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11 #define _SECASN1T_H_
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12
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13 #include "utilrename.h"
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14
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15 /*
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16 ** An array of these structures defines a BER/DER encoding for an object.
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17 **
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18 ** The array usually starts with a dummy entry whose kind is SEC_ASN1_SEQUENCE;
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19 ** such an array is terminated with an entry where kind == 0. (An array
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20 ** which consists of a single component does not require a second dummy
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21 ** entry -- the array is only searched as long as previous component(s)
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22 ** instruct it.)
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23 */
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24 typedef struct sec_ASN1Template_struct {
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25 /*
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26 ** Kind of item being decoded/encoded, including tags and modifiers.
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27 */
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28 unsigned long kind;
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29
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30 /*
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31 ** The value is the offset from the base of the structure to the
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32 ** field that holds the value being decoded/encoded.
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33 */
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34 unsigned long offset;
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35
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36 /*
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37 ** When kind suggests it (SEC_ASN1_POINTER, SEC_ASN1_GROUP, SEC_ASN1_INLINE,
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38 ** or a component that is *not* a SEC_ASN1_UNIVERSAL), this points to
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39 ** a sub-template for nested encoding/decoding,
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40 ** OR, iff SEC_ASN1_DYNAMIC is set, then this is a pointer to a pointer
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41 ** to a function which will return the appropriate template when called
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42 ** at runtime. NOTE! that explicit level of indirection, which is
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43 ** necessary because ANSI does not allow you to store a function
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44 ** pointer directly as a "void *" so we must store it separately and
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45 ** dereference it to get at the function pointer itself.
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46 */
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47 const void *sub;
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48
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49 /*
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50 ** In the first element of a template array, the value is the size
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51 ** of the structure to allocate when this template is being referenced
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52 ** by another template via SEC_ASN1_POINTER or SEC_ASN1_GROUP.
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53 ** In all other cases, the value is ignored.
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54 */
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55 unsigned int size;
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56 } SEC_ASN1Template;
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57
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58
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59 /* default size used for allocation of encoding/decoding stuff */
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60 /* XXX what is the best value here? */
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61 #define SEC_ASN1_DEFAULT_ARENA_SIZE (2048)
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62
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63 /*
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64 ** BER/DER values for ASN.1 identifier octets.
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65 */
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66 #define SEC_ASN1_TAG_MASK 0xff
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67
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68 /*
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69 * BER/DER universal type tag numbers.
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70 * The values are defined by the X.208 standard; do not change them!
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71 * NOTE: if you add anything to this list, you must add code to secasn1d.c
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72 * to accept the tag, and probably also to secasn1e.c to encode it.
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73 * XXX It appears some have been added recently without being added to
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74 * the code; so need to go through the list now and double-check them all.
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75 * (Look especially at those added in revision 1.10.)
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76 */
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77 #define SEC_ASN1_TAGNUM_MASK 0x1f
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78 #define SEC_ASN1_BOOLEAN 0x01
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79 #define SEC_ASN1_INTEGER 0x02
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80 #define SEC_ASN1_BIT_STRING 0x03
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81 #define SEC_ASN1_OCTET_STRING 0x04
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82 #define SEC_ASN1_NULL 0x05
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83 #define SEC_ASN1_OBJECT_ID 0x06
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84 #define SEC_ASN1_OBJECT_DESCRIPTOR 0x07
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85 /* External type and instance-of type 0x08 */
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86 #define SEC_ASN1_REAL 0x09
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87 #define SEC_ASN1_ENUMERATED 0x0a
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88 #define SEC_ASN1_EMBEDDED_PDV 0x0b
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89 #define SEC_ASN1_UTF8_STRING 0x0c
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90 /* 0x0d */
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91 /* 0x0e */
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92 /* 0x0f */
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93 #define SEC_ASN1_SEQUENCE 0x10
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94 #define SEC_ASN1_SET 0x11
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95 #define SEC_ASN1_NUMERIC_STRING 0x12
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96 #define SEC_ASN1_PRINTABLE_STRING 0x13
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97 #define SEC_ASN1_T61_STRING 0x14
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98 #define SEC_ASN1_VIDEOTEX_STRING 0x15
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99 #define SEC_ASN1_IA5_STRING 0x16
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100 #define SEC_ASN1_UTC_TIME 0x17
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101 #define SEC_ASN1_GENERALIZED_TIME 0x18
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102 #define SEC_ASN1_GRAPHIC_STRING 0x19
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103 #define SEC_ASN1_VISIBLE_STRING 0x1a
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104 #define SEC_ASN1_GENERAL_STRING 0x1b
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105 #define SEC_ASN1_UNIVERSAL_STRING 0x1c
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106 /* 0x1d */
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107 #define SEC_ASN1_BMP_STRING 0x1e
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108 #define SEC_ASN1_HIGH_TAG_NUMBER 0x1f
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109 #define SEC_ASN1_TELETEX_STRING SEC_ASN1_T61_STRING
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110
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111 /*
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112 ** Modifiers to type tags. These are also specified by a/the
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113 ** standard, and must not be changed.
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114 */
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115
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116 #define SEC_ASN1_METHOD_MASK 0x20
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117 #define SEC_ASN1_PRIMITIVE 0x00
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118 #define SEC_ASN1_CONSTRUCTED 0x20
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119
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120 #define SEC_ASN1_CLASS_MASK 0xc0
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121 #define SEC_ASN1_UNIVERSAL 0x00
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122 #define SEC_ASN1_APPLICATION 0x40
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123 #define SEC_ASN1_CONTEXT_SPECIFIC 0x80
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124 #define SEC_ASN1_PRIVATE 0xc0
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125
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126 /*
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127 ** Our additions, used for templates.
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128 ** These are not defined by any standard; the values are used internally only.
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129 ** Just be careful to keep them out of the low 8 bits.
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130 ** XXX finish comments
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131 */
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132 #define SEC_ASN1_OPTIONAL 0x00100
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133 #define SEC_ASN1_EXPLICIT 0x00200
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134 #define SEC_ASN1_ANY 0x00400
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135 #define SEC_ASN1_INLINE 0x00800
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136 #define SEC_ASN1_POINTER 0x01000
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137 #define SEC_ASN1_GROUP 0x02000 /* with SET or SEQUENCE means
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138 * SET OF or SEQUENCE OF */
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139 #define SEC_ASN1_DYNAMIC 0x04000 /* subtemplate is found by calling
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140 * a function at runtime */
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141 #define SEC_ASN1_SKIP 0x08000 /* skip a field; only for decoding */
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142 #define SEC_ASN1_INNER 0x10000 /* with ANY means capture the
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143 * contents only (not the id, len,
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144 * or eoc); only for decoding */
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145 #define SEC_ASN1_SAVE 0x20000 /* stash away the encoded bytes first;
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146 * only for decoding */
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147 #define SEC_ASN1_MAY_STREAM 0x40000 /* field or one of its sub-fields may
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148 * stream in and so should encode as
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149 * indefinite-length when streaming
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150 * has been indicated; only for
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151 * encoding */
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152 #define SEC_ASN1_SKIP_REST 0x80000 /* skip all following fields;
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153 only for decoding */
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154 #define SEC_ASN1_CHOICE 0x100000 /* pick one from a template */
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155 #define SEC_ASN1_NO_STREAM 0X200000 /* This entry will not stream
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156 even if the sub-template says
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157 streaming is possible. Helps
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158 to solve ambiguities with potential
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159 streaming entries that are
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160 optional */
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161 #define SEC_ASN1_DEBUG_BREAK 0X400000 /* put this in your template and the
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162 decoder will assert when it
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163 processes it. Only for use with
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164 SEC_QuickDERDecodeItem */
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165
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166
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167
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168 /* Shorthand/Aliases */
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169 #define SEC_ASN1_SEQUENCE_OF (SEC_ASN1_GROUP | SEC_ASN1_SEQUENCE)
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170 #define SEC_ASN1_SET_OF (SEC_ASN1_GROUP | SEC_ASN1_SET)
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171 #define SEC_ASN1_ANY_CONTENTS (SEC_ASN1_ANY | SEC_ASN1_INNER)
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172
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173 /* Maximum depth of nested SEQUENCEs and SETs */
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174 #define SEC_ASN1D_MAX_DEPTH 32
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175
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176 /*
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177 ** Function used for SEC_ASN1_DYNAMIC.
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178 ** "arg" is a pointer to the structure being encoded/decoded
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179 ** "enc", when true, means that we are encoding (false means decoding)
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180 */
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181 typedef const SEC_ASN1Template * SEC_ASN1TemplateChooser(void *arg, PRBool enc);
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182 typedef SEC_ASN1TemplateChooser * SEC_ASN1TemplateChooserPtr;
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183
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184 #if defined(_WIN32) || defined(ANDROID)
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185 #define SEC_ASN1_GET(x) NSS_Get_##x(NULL, PR_FALSE)
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186 #define SEC_ASN1_SUB(x) &p_NSS_Get_##x
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187 #define SEC_ASN1_XTRN SEC_ASN1_DYNAMIC
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188 #define SEC_ASN1_MKSUB(x) \
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189 static const SEC_ASN1TemplateChooserPtr p_NSS_Get_##x = &NSS_Get_##x;
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190 #else
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191 #define SEC_ASN1_GET(x) x
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192 #define SEC_ASN1_SUB(x) x
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193 #define SEC_ASN1_XTRN 0
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194 #define SEC_ASN1_MKSUB(x)
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195 #endif
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196
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197 #define SEC_ASN1_CHOOSER_DECLARE(x) \
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198 extern const SEC_ASN1Template * NSS_Get_##x (void *arg, PRBool enc);
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199
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200 #define SEC_ASN1_CHOOSER_IMPLEMENT(x) \
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201 const SEC_ASN1Template * NSS_Get_##x(void * arg, PRBool enc) \
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202 { return x; }
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203
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204 /*
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205 ** Opaque object used by the decoder to store state.
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206 */
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207 typedef struct sec_DecoderContext_struct SEC_ASN1DecoderContext;
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208
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209 /*
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210 ** Opaque object used by the encoder to store state.
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211 */
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212 typedef struct sec_EncoderContext_struct SEC_ASN1EncoderContext;
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213
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214 /*
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215 * This is used to describe to a filter function the bytes that are
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216 * being passed to it. This is only useful when the filter is an "outer"
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217 * one, meaning it expects to get *all* of the bytes not just the
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218 * contents octets.
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219 */
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220 typedef enum {
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221 SEC_ASN1_Identifier = 0,
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222 SEC_ASN1_Length = 1,
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223 SEC_ASN1_Contents = 2,
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224 SEC_ASN1_EndOfContents = 3
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225 } SEC_ASN1EncodingPart;
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226
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227 /*
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228 * Type of the function pointer used either for decoding or encoding,
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229 * when doing anything "funny" (e.g. manipulating the data stream)
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230 */
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231 typedef void (* SEC_ASN1NotifyProc)(void *arg, PRBool before,
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232 void *dest, int real_depth);
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233
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234 /*
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235 * Type of the function pointer used for grabbing encoded bytes.
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236 * This can be used during either encoding or decoding, as follows...
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237 *
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238 * When decoding, this can be used to filter the encoded bytes as they
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239 * are parsed. This is what you would do if you wanted to process the data
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240 * along the way (like to decrypt it, or to perform a hash on it in order
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241 * to do a signature check later). See SEC_ASN1DecoderSetFilterProc().
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242 * When processing only part of the encoded bytes is desired, you "watch"
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243 * for the field(s) you are interested in with a "notify proc" (see
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244 * SEC_ASN1DecoderSetNotifyProc()) and for even finer granularity (e.g. to
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245 * ignore all by the contents bytes) you pay attention to the "data_kind"
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246 * parameter.
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247 *
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248 * When encoding, this is the specification for the output function which
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249 * will receive the bytes as they are encoded. The output function can
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250 * perform any postprocessing necessary (like hashing (some of) the data
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251 * to create a digest that gets included at the end) as well as shoving
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252 * the data off wherever it needs to go. (In order to "tune" any processing,
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253 * you can set a "notify proc" as described above in the decoding case.)
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254 *
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255 * The parameters:
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256 * - "arg" is an opaque pointer that you provided at the same time you
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257 * specified a function of this type
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258 * - "data" is a buffer of length "len", containing the encoded bytes
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259 * - "depth" is how deep in a nested encoding we are (it is not usually
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260 * valuable, but can be useful sometimes so I included it)
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261 * - "data_kind" tells you if these bytes are part of the ASN.1 encoded
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262 * octets for identifier, length, contents, or end-of-contents
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263 */
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264 typedef void (* SEC_ASN1WriteProc)(void *arg,
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265 const char *data, unsigned long len,
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266 int depth, SEC_ASN1EncodingPart data_kind);
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267
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268 #endif /* _SECASN1T_H_ */
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