2 files changed, 9 insertions, 3 deletions
diff --git a/src/hash/skein/skein_512.cpp b/src/hash/skein/skein_512.cpp
index c8a26ae82..eaef641ed 100644
--- a/src/hash/skein/skein_512.cpp
+++ b/src/hash/skein/skein_512.cpp
@@ -132,6 +132,7 @@ void initial_block(u64bit H[9], u64bit T[3], u32bit output_bits,
    {
    clear_mem(H, 9);
 
+   // ASCII("SHA3") followed by version (0x0001) code
    byte config_str[32] = { 0x53, 0x48, 0x41, 0x33, 0x01, 0x00, 0 };
    store_le(output_bits, config_str + 8);
 
@@ -140,6 +141,11 @@ void initial_block(u64bit H[9], u64bit T[3], u32bit output_bits,
 
    if(personalization != "")
       {
+      /*
+        This is a limitation of this implementation, and not of the
+        algorithm specification. Could be fixed relatively easily, but
+        doesn't seem worth the trouble.
+      */
       if(personalization.length() > 64)
          throw Invalid_Argument("Skein personalization must be <= 64 bytes");
 
diff --git a/src/hash/skein/skein_512.h b/src/hash/skein/skein_512.h
index 2192767ca..fa558fc0d 100644
--- a/src/hash/skein/skein_512.h
+++ b/src/hash/skein/skein_512.h
@@ -5,8 +5,8 @@
 * Distributed under the terms of the Botan license
 */
 
-#ifndef BOTAN_SKEIN_H__
-#define BOTAN_SKEIN_H__
+#ifndef BOTAN_SKEIN_512_H__
+#define BOTAN_SKEIN_512_H__
 
 #include <botan/secmem.h>
 #include <botan/hash.h>
@@ -14,7 +14,7 @@
 
 namespace Botan {
 
-class Skein_512 : public HashFunction
+class BOTAN_DLL Skein_512 : public HashFunction
    {
    public:
       Skein_512(u32bit output_bits = 512,