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1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis |
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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 * |
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9 * Tom St Denis, [email protected], http://libtomcrypt.org |
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10 */ |
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11 #include "tomcrypt.h" |
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12 #include <stdarg.h> |
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13 |
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14 |
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15 /** |
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16 @file der_decode_sequence_multi.c |
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17 ASN.1 DER, decode a SEQUENCE, Tom St Denis |
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18 */ |
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19 |
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20 #ifdef LTC_DER |
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21 |
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22 int der_decode_sequence_multi(const unsigned char *in, unsigned long inlen, ...) |
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23 { |
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24 int err, type; |
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25 unsigned long size, x; |
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26 void *data; |
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27 va_list args; |
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28 ltc_asn1_list *list; |
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29 |
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30 LTC_ARGCHK(in != NULL); |
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31 |
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32 /* get size of output that will be required */ |
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33 va_start(args, inlen); |
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34 x = 0; |
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35 for (;;) { |
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36 type = va_arg(args, int); |
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37 size = va_arg(args, unsigned long); |
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38 data = va_arg(args, void*); |
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39 |
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40 if (type == LTC_ASN1_EOL) { |
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41 break; |
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42 } |
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43 |
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44 switch (type) { |
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45 case LTC_ASN1_INTEGER: |
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46 case LTC_ASN1_SHORT_INTEGER: |
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47 case LTC_ASN1_BIT_STRING: |
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48 case LTC_ASN1_OCTET_STRING: |
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49 case LTC_ASN1_NULL: |
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50 case LTC_ASN1_OBJECT_IDENTIFIER: |
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51 case LTC_ASN1_IA5_STRING: |
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52 case LTC_ASN1_PRINTABLE_STRING: |
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53 case LTC_ASN1_UTCTIME: |
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54 case LTC_ASN1_SEQUENCE: |
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55 case LTC_ASN1_CHOICE: |
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56 ++x; |
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57 break; |
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58 |
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59 default: |
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60 va_end(args); |
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61 return CRYPT_INVALID_ARG; |
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62 } |
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63 } |
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64 va_end(args); |
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65 |
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66 /* allocate structure for x elements */ |
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67 if (x == 0) { |
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68 return CRYPT_NOP; |
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69 } |
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70 |
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71 list = XCALLOC(sizeof(*list), x); |
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72 if (list == NULL) { |
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73 return CRYPT_MEM; |
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74 } |
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75 |
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76 /* fill in the structure */ |
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77 va_start(args, inlen); |
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78 x = 0; |
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79 for (;;) { |
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80 type = va_arg(args, int); |
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81 size = va_arg(args, unsigned long); |
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82 data = va_arg(args, void*); |
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83 |
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84 if (type == LTC_ASN1_EOL) { |
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85 break; |
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86 } |
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87 |
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88 switch (type) { |
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89 case LTC_ASN1_INTEGER: |
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90 case LTC_ASN1_SHORT_INTEGER: |
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91 case LTC_ASN1_BIT_STRING: |
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92 case LTC_ASN1_OCTET_STRING: |
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93 case LTC_ASN1_NULL: |
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94 case LTC_ASN1_OBJECT_IDENTIFIER: |
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95 case LTC_ASN1_IA5_STRING: |
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96 case LTC_ASN1_PRINTABLE_STRING: |
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97 case LTC_ASN1_UTCTIME: |
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98 case LTC_ASN1_SEQUENCE: |
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99 case LTC_ASN1_CHOICE: |
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100 list[x].type = type; |
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101 list[x].size = size; |
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102 list[x++].data = data; |
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103 break; |
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104 |
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105 default: |
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106 va_end(args); |
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107 err = CRYPT_INVALID_ARG; |
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108 goto LBL_ERR; |
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109 } |
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110 } |
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111 va_end(args); |
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112 |
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113 err = der_decode_sequence(in, inlen, list, x); |
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114 LBL_ERR: |
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115 XFREE(list); |
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116 return err; |
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117 } |
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118 |
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119 #endif |
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120 |
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121 |
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122 /* $Source: /cvs/libtom/libtomcrypt/src/pk/asn1/der/sequence/der_decode_sequence_multi.c,v $ */ |
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123 /* $Revision: 1.7 $ */ |
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124 /* $Date: 2005/06/18 19:20:23 $ */ |
