| /* LibTomCrypt, modular cryptographic library -- Tom St Denis |
| * |
| * LibTomCrypt is a library that provides various cryptographic |
| * algorithms in a highly modular and flexible manner. |
| * |
| * The library is free for all purposes without any express |
| * guarantee it works. |
| * |
| * Tom St Denis, tomstdenis@gmail.com, http://libtomcrypt.com |
| */ |
| #include "tomcrypt.h" |
| |
| /** |
| @file der_encode_set.c |
| ASN.1 DER, Encode a SET, Tom St Denis |
| */ |
| |
| #ifdef LTC_DER |
| |
| /* LTC define to ASN.1 TAG */ |
| static int ltc_to_asn1(int v) |
| { |
| switch (v) { |
| case LTC_ASN1_BOOLEAN: return 0x01; |
| case LTC_ASN1_INTEGER: |
| case LTC_ASN1_SHORT_INTEGER: return 0x02; |
| case LTC_ASN1_BIT_STRING: return 0x03; |
| case LTC_ASN1_OCTET_STRING: return 0x04; |
| case LTC_ASN1_NULL: return 0x05; |
| case LTC_ASN1_OBJECT_IDENTIFIER: return 0x06; |
| case LTC_ASN1_UTF8_STRING: return 0x0C; |
| case LTC_ASN1_PRINTABLE_STRING: return 0x13; |
| case LTC_ASN1_IA5_STRING: return 0x16; |
| case LTC_ASN1_UTCTIME: return 0x17; |
| case LTC_ASN1_SEQUENCE: return 0x30; |
| case LTC_ASN1_SET: |
| case LTC_ASN1_SETOF: return 0x31; |
| default: return -1; |
| } |
| } |
| |
| |
| static int qsort_helper(const void *a, const void *b) |
| { |
| ltc_asn1_list *A = (ltc_asn1_list *)a, *B = (ltc_asn1_list *)b; |
| int r; |
| |
| r = ltc_to_asn1(A->type) - ltc_to_asn1(B->type); |
| |
| /* for QSORT the order is UNDEFINED if they are "equal" which means it is NOT DETERMINISTIC. So we force it to be :-) */ |
| if (r == 0) { |
| /* their order in the original list now determines the position */ |
| return A->used - B->used; |
| } else { |
| return r; |
| } |
| } |
| |
| /* |
| Encode a SET type |
| @param list The list of items to encode |
| @param inlen The number of items in the list |
| @param out [out] The destination |
| @param outlen [in/out] The size of the output |
| @return CRYPT_OK on success |
| */ |
| int der_encode_set(ltc_asn1_list *list, unsigned long inlen, |
| unsigned char *out, unsigned long *outlen) |
| { |
| ltc_asn1_list *copy; |
| unsigned long x; |
| int err; |
| |
| /* make copy of list */ |
| copy = XCALLOC(inlen, sizeof(*copy)); |
| if (copy == NULL) { |
| return CRYPT_MEM; |
| } |
| |
| /* fill in used member with index so we can fully sort it */ |
| for (x = 0; x < inlen; x++) { |
| copy[x] = list[x]; |
| copy[x].used = x; |
| } |
| |
| /* sort it by the "type" field */ |
| XQSORT(copy, inlen, sizeof(*copy), &qsort_helper); |
| |
| /* call der_encode_sequence_ex() */ |
| err = der_encode_sequence_ex(copy, inlen, out, outlen, LTC_ASN1_SET); |
| |
| /* free list */ |
| XFREE(copy); |
| |
| return err; |
| } |
| |
| |
| #endif |
| |
| /* $Source: /cvs/libtom/libtomcrypt/src/pk/asn1/der/set/der_encode_set.c,v $ */ |
| /* $Revision: 1.11 $ */ |
| /* $Date: 2006/11/26 02:27:37 $ */ |