--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rsa_export.c	Tue Jun 15 14:07:21 2004 +0000
@@ -0,0 +1,72 @@
+/* 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_export(unsigned char *out, unsigned long *outlen, int type, rsa_key *key)
+{
+   unsigned long y, z; 
+   int err;
+
+   _ARGCHK(out    != NULL);
+   _ARGCHK(outlen != NULL);
+   _ARGCHK(key    != NULL);
+   
+   /* can we store the static header?  */
+   if (*outlen < (PACKET_SIZE + 1)) {
+      return CRYPT_BUFFER_OVERFLOW;
+   }   
+
+   /* type valid? */
+   if (!(key->type == PK_PRIVATE || key->type == PK_PRIVATE_OPTIMIZED) &&
+        (type == PK_PRIVATE || type == PK_PRIVATE_OPTIMIZED)) {
+      return CRYPT_PK_INVALID_TYPE;
+   }
+
+   /* start at offset y=PACKET_SIZE */
+   y = PACKET_SIZE;
+
+   /* output key type */
+   out[y++] = type;
+
+   /* output modulus */
+   OUTPUT_BIGNUM(&key->N, out, y, z);
+
+   /* output public key */
+   OUTPUT_BIGNUM(&key->e, out, y, z);
+
+   if (type == PK_PRIVATE || type == PK_PRIVATE_OPTIMIZED) {
+      OUTPUT_BIGNUM(&key->d, out, y, z);
+   }
+
+   if (type == PK_PRIVATE_OPTIMIZED) {
+      OUTPUT_BIGNUM(&key->dQ, out, y, z);
+      OUTPUT_BIGNUM(&key->dP, out, y, z);
+      OUTPUT_BIGNUM(&key->pQ, out, y, z);
+      OUTPUT_BIGNUM(&key->qP, out, y, z);
+      OUTPUT_BIGNUM(&key->p, out, y, z);
+      OUTPUT_BIGNUM(&key->q, out, y, z);
+   }
+
+   /* store packet header */
+   packet_store_header(out, PACKET_SECT_RSA, PACKET_SUB_KEY);
+
+   /* copy to the user buffer */
+   *outlen = y;
+
+   /* clear stack and return */
+   return CRYPT_OK;
+}
+
+#endif /* MRSA */
+