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