1 files changed, 81 insertions, 0 deletions
diff --git a/libtomcrypt/src/pk/katja/katja_import.c b/libtomcrypt/src/pk/katja/katja_import.c
new file mode 100644
index 0000000..efdbe07
--- /dev/null
+++ b/libtomcrypt/src/pk/katja/katja_import.c
@@ -0,0 +1,81 @@
+/* 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 katja_import.c
+  Import a PKCS-style Katja key, Tom St Denis
+*/  
+
+#ifdef 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 /* MRSA */
+
+
+/* $Source: /cvs/libtom/libtomcrypt/src/pk/katja/katja_import.c,v $ */
+/* $Revision: 1.3 $ */
+/* $Date: 2006/03/31 14:15:35 $ */