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81 lines
2.5 KiB
C
81 lines
2.5 KiB
C
#define LTC_SOURCE
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/* 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 katja_import.c
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Import a PKCS-style Katja key, Tom St Denis
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*/
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#ifdef LTC_MKAT
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/**
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Import an KatjaPublicKey or KatjaPrivateKey [two-prime only, only support >= 1024-bit keys, defined in PKCS #1 v2.1]
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@param in The packet to import from
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@param inlen It's length (octets)
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@param key [out] Destination for newly imported key
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@return CRYPT_OK if successful, upon error allocated memory is freed
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*/
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int katja_import(const unsigned char *in, unsigned long inlen, katja_key *key)
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{
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int err;
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void *zero;
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LTC_ARGCHK(in != NULL);
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LTC_ARGCHK(key != NULL);
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LTC_ARGCHK(ltc_mp.name != NULL);
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/* init key */
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if ((err = mp_init_multi(&zero, &key->d, &key->N, &key->dQ,
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&key->dP, &key->qP, &key->p, &key->q, &key->pq, NULL)) != CRYPT_OK) {
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return err;
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}
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if ((err = der_decode_sequence_multi(in, inlen,
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LTC_ASN1_INTEGER, 1UL, key->N,
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LTC_ASN1_EOL, 0UL, NULL)) != CRYPT_OK) {
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goto LBL_ERR;
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}
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if (mp_cmp_d(key->N, 0) == LTC_MP_EQ) {
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/* it's a private key */
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if ((err = der_decode_sequence_multi(in, inlen,
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LTC_ASN1_INTEGER, 1UL, zero,
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LTC_ASN1_INTEGER, 1UL, key->N,
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LTC_ASN1_INTEGER, 1UL, key->d,
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LTC_ASN1_INTEGER, 1UL, key->p,
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LTC_ASN1_INTEGER, 1UL, key->q,
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LTC_ASN1_INTEGER, 1UL, key->dP,
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LTC_ASN1_INTEGER, 1UL, key->dQ,
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LTC_ASN1_INTEGER, 1UL, key->qP,
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LTC_ASN1_INTEGER, 1UL, key->pq,
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LTC_ASN1_EOL, 0UL, NULL)) != CRYPT_OK) {
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goto LBL_ERR;
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}
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key->type = PK_PRIVATE;
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} else {
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/* public we have N */
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key->type = PK_PUBLIC;
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}
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mp_clear(zero);
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return CRYPT_OK;
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LBL_ERR:
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mp_clear_multi(zero, key->d, key->N, key->dQ, key->dP,
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key->qP, key->p, key->q, key->pq, NULL);
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return err;
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}
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#endif /* LTC_MRSA */
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/* ref: $Format:%D$ */
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/* git commit: $Format:%H$ */
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/* commit time: $Format:%ai$ */
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