Mercurial > dropbear

annotate src/pk/asn1/der/choice/der_decode_choice.c @ 380:d5faf4814ddb libtomcrypt-orig libtomcrypt-1.16

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Update to LibTomCrypt 1.16
author Matt Johnston <matt@ucc.asn.au>
date Thu, 11 Jan 2007 02:22:00 +0000
parents 59400faa4b44
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
280
59400faa4b44 Re-import libtomcrypt 1.05 for cleaner propagating.
Matt Johnston <matt@ucc.asn.au>
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diff changeset
1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
59400faa4b44 Re-import libtomcrypt 1.05 for cleaner propagating.
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2 *
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3 * LibTomCrypt is a library that provides various cryptographic
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4 * algorithms in a highly modular and flexible manner.
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5 *
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6 * The library is free for all purposes without any express
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7 * guarantee it works.
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8 *
380
d5faf4814ddb Update to LibTomCrypt 1.16
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diff changeset
9 * Tom St Denis, [email protected], http://libtomcrypt.com
280
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10 */
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11 #include "tomcrypt.h"
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12
59400faa4b44 Re-import libtomcrypt 1.05 for cleaner propagating.
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13 /**
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14 @file der_decode_choice.c
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15 ASN.1 DER, decode a CHOICE, Tom St Denis
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16 */
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17
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18 #ifdef LTC_DER
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19
59400faa4b44 Re-import libtomcrypt 1.05 for cleaner propagating.
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20 /**
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21 Decode a CHOICE
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22 @param in The DER encoded input
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23 @param inlen [in/out] The size of the input and resulting size of read type
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24 @param list The list of items to decode
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25 @param outlen The number of items in the list
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26 @return CRYPT_OK on success
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27 */
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28 int der_decode_choice(const unsigned char *in, unsigned long *inlen,
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29 ltc_asn1_list *list, unsigned long outlen)
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30 {
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31 unsigned long size, x, z;
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32 void *data;
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33
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34 LTC_ARGCHK(in != NULL);
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35 LTC_ARGCHK(inlen != NULL);
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36 LTC_ARGCHK(list != NULL);
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37
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38 /* get blk size */
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39 if (*inlen < 2) {
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40 return CRYPT_INVALID_PACKET;
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41 }
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42
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43 /* set all of the "used" flags to zero */
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44 for (x = 0; x < outlen; x++) {
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45 list[x].used = 0;
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46 }
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47
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48 /* now scan until we have a winner */
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49 for (x = 0; x < outlen; x++) {
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50 size = list[x].size;
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51 data = list[x].data;
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52
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53 switch (list[x].type) {
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54 case LTC_ASN1_INTEGER:
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55 if (der_decode_integer(in, *inlen, data) == CRYPT_OK) {
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56 if (der_length_integer(data, &z) == CRYPT_OK) {
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57 list[x].used = 1;
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58 *inlen = z;
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59 return CRYPT_OK;
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60 }
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61 }
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62 break;
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63
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64 case LTC_ASN1_SHORT_INTEGER:
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65 if (der_decode_short_integer(in, *inlen, data) == CRYPT_OK) {
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66 if (der_length_short_integer(size, &z) == CRYPT_OK) {
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67 list[x].used = 1;
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68 *inlen = z;
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69 return CRYPT_OK;
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70 }
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71 }
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72 break;
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73
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74 case LTC_ASN1_BIT_STRING:
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75 if (der_decode_bit_string(in, *inlen, data, &size) == CRYPT_OK) {
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76 if (der_length_bit_string(size, &z) == CRYPT_OK) {
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77 list[x].used = 1;
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78 list[x].size = size;
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79 *inlen = z;
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80 return CRYPT_OK;
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81 }
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82 }
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83 break;
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84
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85 case LTC_ASN1_OCTET_STRING:
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86 if (der_decode_octet_string(in, *inlen, data, &size) == CRYPT_OK) {
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87 if (der_length_octet_string(size, &z) == CRYPT_OK) {
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88 list[x].used = 1;
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89 list[x].size = size;
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90 *inlen = z;
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91 return CRYPT_OK;
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92 }
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93 }
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94 break;
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95
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96 case LTC_ASN1_NULL:
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97 if (*inlen == 2 && in[x] == 0x05 && in[x+1] == 0x00) {
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98 *inlen = 2;
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99 list[x].used = 1;
280
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100 return CRYPT_OK;
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101 }
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102 break;
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103
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104 case LTC_ASN1_OBJECT_IDENTIFIER:
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105 if (der_decode_object_identifier(in, *inlen, data, &size) == CRYPT_OK) {
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106 if (der_length_object_identifier(data, size, &z) == CRYPT_OK) {
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107 list[x].used = 1;
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108 list[x].size = size;
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109 *inlen = z;
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110 return CRYPT_OK;
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111 }
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112 }
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113 break;
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114
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115 case LTC_ASN1_IA5_STRING:
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116 if (der_decode_ia5_string(in, *inlen, data, &size) == CRYPT_OK) {
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117 if (der_length_ia5_string(data, size, &z) == CRYPT_OK) {
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118 list[x].used = 1;
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119 list[x].size = size;
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120 *inlen = z;
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121 return CRYPT_OK;
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122 }
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123 }
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124 break;
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125
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126
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127 case LTC_ASN1_PRINTABLE_STRING:
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128 if (der_decode_printable_string(in, *inlen, data, &size) == CRYPT_OK) {
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129 if (der_length_printable_string(data, size, &z) == CRYPT_OK) {
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130 list[x].used = 1;
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131 list[x].size = size;
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132 *inlen = z;
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133 return CRYPT_OK;
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134 }
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135 }
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136 break;
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diff changeset
137
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138 case LTC_ASN1_UTF8_STRING:
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139 if (der_decode_utf8_string(in, *inlen, data, &size) == CRYPT_OK) {
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diff changeset
140 if (der_length_utf8_string(data, size, &z) == CRYPT_OK) {
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141 list[x].used = 1;
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142 list[x].size = size;
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143 *inlen = z;
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144 return CRYPT_OK;
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145 }
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146 }
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147 break;
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148
280
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Matt Johnston <matt@ucc.asn.au>
parents:
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149 case LTC_ASN1_UTCTIME:
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Matt Johnston <matt@ucc.asn.au>
parents:
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150 z = *inlen;
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
151 if (der_decode_utctime(in, &z, data) == CRYPT_OK) {
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Matt Johnston <matt@ucc.asn.au>
parents:
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152 list[x].used = 1;
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Matt Johnston <matt@ucc.asn.au>
parents:
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153 *inlen = z;
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
154 return CRYPT_OK;
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parents:
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155 }
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
156 break;
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
157
380
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diff changeset
158 case LTC_ASN1_SET:
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diff changeset
159 case LTC_ASN1_SETOF:
280
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Matt Johnston <matt@ucc.asn.au>
parents:
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160 case LTC_ASN1_SEQUENCE:
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
161 if (der_decode_sequence(in, *inlen, data, size) == CRYPT_OK) {
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
162 if (der_length_sequence(data, size, &z) == CRYPT_OK) {
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Matt Johnston <matt@ucc.asn.au>
parents:
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163 list[x].used = 1;
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
164 *inlen = z;
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Matt Johnston <matt@ucc.asn.au>
parents:
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165 return CRYPT_OK;
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
166 }
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
167 }
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
168 break;
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
169
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
170 default:
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
171 return CRYPT_INVALID_ARG;
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
172 }
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
173 }
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
174
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
175 return CRYPT_INVALID_PACKET;
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
176 }
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
177
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
178 #endif
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Matt Johnston <matt@ucc.asn.au>
parents:
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179
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
180 /* $Source: /cvs/libtom/libtomcrypt/src/pk/asn1/der/choice/der_decode_choice.c,v $ */
380
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diff changeset
181 /* $Revision: 1.8 $ */
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diff changeset
182 /* $Date: 2006/12/06 02:23:49 $ */