Mercurial > dropbear
annotate libtomcrypt/src/pk/asn1/der/set/der_encode_set.c @ 1789:249681d9ecda
Use buf_eatstring instead
author | Matt Johnston <matt@ucc.asn.au> |
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date | Thu, 10 Dec 2020 23:18:48 +0800 |
parents | 6dba84798cd5 |
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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 #include "tomcrypt.h" |
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10 |
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11 /** |
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12 @file der_encode_set.c |
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13 ASN.1 DER, Encode a SET, Tom St Denis |
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14 */ |
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15 |
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16 #ifdef LTC_DER |
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17 |
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18 /* LTC define to ASN.1 TAG */ |
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19 static int _ltc_to_asn1(ltc_asn1_type v) |
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20 { |
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21 switch (v) { |
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22 case LTC_ASN1_BOOLEAN: return 0x01; |
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23 case LTC_ASN1_INTEGER: |
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24 case LTC_ASN1_SHORT_INTEGER: return 0x02; |
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25 case LTC_ASN1_RAW_BIT_STRING: |
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26 case LTC_ASN1_BIT_STRING: return 0x03; |
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27 case LTC_ASN1_OCTET_STRING: return 0x04; |
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28 case LTC_ASN1_NULL: return 0x05; |
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29 case LTC_ASN1_OBJECT_IDENTIFIER: return 0x06; |
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30 case LTC_ASN1_UTF8_STRING: return 0x0C; |
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31 case LTC_ASN1_PRINTABLE_STRING: return 0x13; |
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32 case LTC_ASN1_TELETEX_STRING: return 0x14; |
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33 case LTC_ASN1_IA5_STRING: return 0x16; |
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34 case LTC_ASN1_UTCTIME: return 0x17; |
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35 case LTC_ASN1_GENERALIZEDTIME: return 0x18; |
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36 case LTC_ASN1_SEQUENCE: return 0x30; |
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37 case LTC_ASN1_SET: |
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38 case LTC_ASN1_SETOF: return 0x31; |
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39 case LTC_ASN1_CHOICE: |
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40 case LTC_ASN1_CONSTRUCTED: |
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41 case LTC_ASN1_CONTEXT_SPECIFIC: |
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42 case LTC_ASN1_EOL: return -1; |
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43 } |
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44 return -1; |
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45 } |
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46 |
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47 |
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48 static int _qsort_helper(const void *a, const void *b) |
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49 { |
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50 ltc_asn1_list *A = (ltc_asn1_list *)a, *B = (ltc_asn1_list *)b; |
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51 int r; |
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52 |
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53 r = _ltc_to_asn1(A->type) - _ltc_to_asn1(B->type); |
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54 |
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55 /* for QSORT the order is UNDEFINED if they are "equal" which means it is NOT DETERMINISTIC. So we force it to be :-) */ |
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56 if (r == 0) { |
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57 /* their order in the original list now determines the position */ |
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58 return A->used - B->used; |
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59 } else { |
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60 return r; |
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61 } |
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62 } |
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63 |
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64 /* |
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65 Encode a SET type |
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66 @param list The list of items to encode |
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67 @param inlen The number of items in the list |
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68 @param out [out] The destination |
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69 @param outlen [in/out] The size of the output |
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70 @return CRYPT_OK on success |
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71 */ |
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72 int der_encode_set(ltc_asn1_list *list, unsigned long inlen, |
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73 unsigned char *out, unsigned long *outlen) |
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74 { |
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75 ltc_asn1_list *copy; |
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76 unsigned long x; |
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77 int err; |
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78 |
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79 /* make copy of list */ |
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80 copy = XCALLOC(inlen, sizeof(*copy)); |
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81 if (copy == NULL) { |
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82 return CRYPT_MEM; |
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83 } |
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84 |
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85 /* fill in used member with index so we can fully sort it */ |
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86 for (x = 0; x < inlen; x++) { |
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87 copy[x] = list[x]; |
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88 copy[x].used = x; |
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89 } |
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90 |
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91 /* sort it by the "type" field */ |
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92 XQSORT(copy, inlen, sizeof(*copy), &_qsort_helper); |
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93 |
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94 /* call der_encode_sequence_ex() */ |
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95 err = der_encode_sequence_ex(copy, inlen, out, outlen, LTC_ASN1_SET); |
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96 |
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97 /* free list */ |
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98 XFREE(copy); |
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99 |
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100 return err; |
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101 } |
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102 |
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103 |
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104 #endif |
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105 |
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106 /* ref: $Format:%D$ */ |
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107 /* git commit: $Format:%H$ */ |
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108 /* commit time: $Format:%ai$ */ |