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109 lines
3.1 KiB
C
109 lines
3.1 KiB
C
/* LibTomCrypt, modular cryptographic library -- Tom St Denis
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*
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* LibTomCrypt is a library that provides various cryptographic
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* algorithms in a highly modular and flexible manner.
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*
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* The library is free for all purposes without any express
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* guarantee it works.
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*/
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#include "tomcrypt.h"
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/**
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@file der_encode_set.c
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ASN.1 DER, Encode a SET, Tom St Denis
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*/
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#ifdef LTC_DER
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/* LTC define to ASN.1 TAG */
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static int _ltc_to_asn1(ltc_asn1_type v)
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{
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switch (v) {
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case LTC_ASN1_BOOLEAN: return 0x01;
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case LTC_ASN1_INTEGER:
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case LTC_ASN1_SHORT_INTEGER: return 0x02;
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case LTC_ASN1_RAW_BIT_STRING:
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case LTC_ASN1_BIT_STRING: return 0x03;
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case LTC_ASN1_OCTET_STRING: return 0x04;
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case LTC_ASN1_NULL: return 0x05;
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case LTC_ASN1_OBJECT_IDENTIFIER: return 0x06;
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case LTC_ASN1_UTF8_STRING: return 0x0C;
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case LTC_ASN1_PRINTABLE_STRING: return 0x13;
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case LTC_ASN1_TELETEX_STRING: return 0x14;
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case LTC_ASN1_IA5_STRING: return 0x16;
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case LTC_ASN1_UTCTIME: return 0x17;
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case LTC_ASN1_GENERALIZEDTIME: return 0x18;
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case LTC_ASN1_SEQUENCE: return 0x30;
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case LTC_ASN1_SET:
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case LTC_ASN1_SETOF: return 0x31;
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case LTC_ASN1_CHOICE:
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case LTC_ASN1_CONSTRUCTED:
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case LTC_ASN1_CONTEXT_SPECIFIC:
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case LTC_ASN1_EOL: return -1;
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}
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return -1;
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}
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static int _qsort_helper(const void *a, const void *b)
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{
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ltc_asn1_list *A = (ltc_asn1_list *)a, *B = (ltc_asn1_list *)b;
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int r;
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r = _ltc_to_asn1(A->type) - _ltc_to_asn1(B->type);
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/* 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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if (r == 0) {
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/* their order in the original list now determines the position */
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return A->used - B->used;
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} else {
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return r;
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}
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}
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/*
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Encode a SET type
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@param list The list of items to encode
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@param inlen The number of items in the list
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@param out [out] The destination
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@param outlen [in/out] The size of the output
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@return CRYPT_OK on success
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*/
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int der_encode_set(ltc_asn1_list *list, unsigned long inlen,
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unsigned char *out, unsigned long *outlen)
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{
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ltc_asn1_list *copy;
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unsigned long x;
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int err;
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/* make copy of list */
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copy = XCALLOC(inlen, sizeof(*copy));
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if (copy == NULL) {
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return CRYPT_MEM;
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}
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/* fill in used member with index so we can fully sort it */
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for (x = 0; x < inlen; x++) {
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copy[x] = list[x];
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copy[x].used = x;
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}
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/* sort it by the "type" field */
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XQSORT(copy, inlen, sizeof(*copy), &_qsort_helper);
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/* call der_encode_sequence_ex() */
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err = der_encode_sequence_ex(copy, inlen, out, outlen, LTC_ASN1_SET);
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/* free list */
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XFREE(copy);
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return err;
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}
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#endif
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/* ref: HEAD -> master, tag: v1.18.2 */
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/* git commit: 7e7eb695d581782f04b24dc444cbfde86af59853 */
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/* commit time: 2018-07-01 22:49:01 +0200 */
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