--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rsa_import.c	Tue Jun 15 14:07:21 2004 +0000
@@ -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, [email protected], http://libtomcrypt.org
+ */
+
+#include "mycrypt.h"
+
+#ifdef MRSA
+
+int rsa_import(const unsigned char *in, unsigned long inlen, rsa_key *key)
+{
+   unsigned long x, y;
+   int err;
+
+   _ARGCHK(in  != NULL);
+   _ARGCHK(key != NULL);
+
+   /* check length */
+   if (inlen < (1+PACKET_SIZE)) {
+      return CRYPT_INVALID_PACKET;
+   }
+
+   /* test packet header */
+   if ((err = packet_valid_header((unsigned char *)in, PACKET_SECT_RSA, PACKET_SUB_KEY)) != CRYPT_OK) {
+      return err;
+   }
+
+   /* init key */
+   if ((err = mp_init_multi(&key->e, &key->d, &key->N, &key->dQ, &key->dP, &key->qP,
+                     &key->pQ, &key->p, &key->q, NULL)) != MP_OKAY) {
+      return mpi_to_ltc_error(err);
+   }
+
+   /* get key type */
+   y = PACKET_SIZE;
+   key->type = (int)in[y++];
+
+   /* load the modulus  */
+   INPUT_BIGNUM(&key->N, in, x, y, inlen);
+
+   /* load public exponent */
+   INPUT_BIGNUM(&key->e, in, x, y, inlen);
+
+   /* get private exponent */
+   if (key->type == PK_PRIVATE || key->type == PK_PRIVATE_OPTIMIZED) {
+      INPUT_BIGNUM(&key->d, in, x, y, inlen);
+   }
+
+   /* get CRT private data if required */
+   if (key->type == PK_PRIVATE_OPTIMIZED) {
+      INPUT_BIGNUM(&key->dQ, in, x, y, inlen);
+      INPUT_BIGNUM(&key->dP, in, x, y, inlen);
+      INPUT_BIGNUM(&key->pQ, in, x, y, inlen);
+      INPUT_BIGNUM(&key->qP, in, x, y, inlen);
+      INPUT_BIGNUM(&key->p, in, x, y, inlen);
+      INPUT_BIGNUM(&key->q, in, x, y, inlen);
+   }
+
+   /* free up ram not required */
+   if (key->type != PK_PRIVATE_OPTIMIZED) {
+      mp_clear_multi(&key->dQ, &key->dP, &key->pQ, &key->qP, &key->p, &key->q, NULL);
+   }
+   if (key->type != PK_PRIVATE && key->type != PK_PRIVATE_OPTIMIZED) {
+      mp_clear(&key->d);
+   }
+
+   return CRYPT_OK;
+error:
+   mp_clear_multi(&key->d, &key->e, &key->N, &key->dQ, &key->dP,
+                  &key->pQ, &key->qP, &key->p, &key->q, NULL);
+   return err;
+}
+
+#endif /* MRSA */
+