--- a/libtomcrypt/src/pk/rsa/rsa_export.c	Thu Feb 08 23:11:40 2018 +0800
+++ b/libtomcrypt/src/pk/rsa/rsa_export.c	Fri Feb 09 21:44:05 2018 +0800
@@ -5,29 +5,28 @@
  *
  * The library is free for all purposes without any express
  * guarantee it works.
- *
- * Tom St Denis, [email protected], http://libtom.org
  */
 #include "tomcrypt.h"
 
 /**
   @file rsa_export.c
-  Export RSA LTC_PKCS keys, Tom St Denis
-*/  
+  Export RSA PKCS keys, Tom St Denis
+*/
 
 #ifdef LTC_MRSA
 
 /**
-    This will export either an RSAPublicKey or RSAPrivateKey [defined in LTC_PKCS #1 v2.1] 
+    This will export either an RSAPublicKey or RSAPrivateKey [defined in PKCS #1 v2.1]
     @param out       [out] Destination of the packet
     @param outlen    [in/out] The max size and resulting size of the packet
     @param type      The type of exported key (PK_PRIVATE or PK_PUBLIC)
     @param key       The RSA key to export
     @return CRYPT_OK if successful
-*/    
+*/
 int rsa_export(unsigned char *out, unsigned long *outlen, int type, rsa_key *key)
 {
    unsigned long zero=0;
+   int err;
    LTC_ARGCHK(out    != NULL);
    LTC_ARGCHK(outlen != NULL);
    LTC_ARGCHK(key    != NULL);
@@ -39,31 +38,60 @@
 
    if (type == PK_PRIVATE) {
       /* private key */
-      /* output is 
+      /* output is
             Version, n, e, d, p, q, d mod (p-1), d mod (q - 1), 1/q mod p
        */
-      return der_encode_sequence_multi(out, outlen, 
-                          LTC_ASN1_SHORT_INTEGER, 1UL, &zero, 
-                          LTC_ASN1_INTEGER, 1UL,  key->N, 
+      return der_encode_sequence_multi(out, outlen,
+                          LTC_ASN1_SHORT_INTEGER, 1UL, &zero,
+                          LTC_ASN1_INTEGER, 1UL,  key->N,
                           LTC_ASN1_INTEGER, 1UL,  key->e,
-                          LTC_ASN1_INTEGER, 1UL,  key->d, 
-                          LTC_ASN1_INTEGER, 1UL,  key->p, 
-                          LTC_ASN1_INTEGER, 1UL,  key->q, 
+                          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->dQ,
+                          LTC_ASN1_INTEGER, 1UL,  key->qP,
                           LTC_ASN1_EOL,     0UL, NULL);
    } else {
       /* public key */
-      return der_encode_sequence_multi(out, outlen, 
-                                 LTC_ASN1_INTEGER, 1UL,  key->N, 
-                                 LTC_ASN1_INTEGER, 1UL,  key->e, 
+      unsigned long tmplen, *ptmplen;
+      unsigned char* tmp = NULL;
+
+      if (type & PK_STD) {
+          tmplen = (mp_count_bits(key->N)/8)*2+8;
+          tmp = XMALLOC(tmplen);
+          ptmplen = &tmplen;
+          if (tmp == NULL) {
+              return CRYPT_MEM;
+          }
+      }
+      else {
+          tmp = out;
+          ptmplen = outlen;
+      }
+
+      err = der_encode_sequence_multi(tmp, ptmplen,
+                                 LTC_ASN1_INTEGER, 1UL,  key->N,
+                                 LTC_ASN1_INTEGER, 1UL,  key->e,
                                  LTC_ASN1_EOL,     0UL, NULL);
+
+      if ((err != CRYPT_OK) || !(type & PK_STD)) {
+          goto finish;
+      }
+
+      err = der_encode_subject_public_key_info(out, outlen,
+        PKA_RSA, tmp, tmplen, LTC_ASN1_NULL, NULL, 0);
+
+finish:
+      if (tmp != out)
+        XFREE(tmp);
+      return err;
+
    }
 }
 
 #endif /* LTC_MRSA */
 
-/* $Source$ */
-/* $Revision$ */
-/* $Date$ */
+/* ref:         $Format:%D$ */
+/* git commit:  $Format:%H$ */
+/* commit time: $Format:%ai$ */