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-rw-r--r--src/kdf/kdf2/kdf2.cpp51
-rw-r--r--src/kdf/kdf2/kdf2.h29
-rw-r--r--src/kdf/kdf2/modinfo.txt10
3 files changed, 90 insertions, 0 deletions
diff --git a/src/kdf/kdf2/kdf2.cpp b/src/kdf/kdf2/kdf2.cpp
new file mode 100644
index 000000000..fa975ccb9
--- /dev/null
+++ b/src/kdf/kdf2/kdf2.cpp
@@ -0,0 +1,51 @@
+/*************************************************
+* KDF2 Source File *
+* (C) 1999-2007 Jack Lloyd *
+*************************************************/
+
+#include <botan/kdf2.h>
+#include <botan/lookup.h>
+#include <botan/loadstor.h>
+#include <memory>
+
+namespace Botan {
+
+/*************************************************
+* KDF2 Key Derivation Mechanism *
+*************************************************/
+SecureVector<byte> KDF2::derive(u32bit out_len,
+ const byte secret[], u32bit secret_len,
+ const byte P[], u32bit P_len) const
+ {
+ SecureVector<byte> output;
+ u32bit counter = 1;
+
+ std::auto_ptr<HashFunction> hash(get_hash(hash_name));
+ while(out_len && counter)
+ {
+ hash->update(secret, secret_len);
+ for(u32bit j = 0; j != 4; ++j)
+ hash->update(get_byte(j, counter));
+ hash->update(P, P_len);
+ SecureVector<byte> hash_result = hash->final();
+
+ u32bit added = std::min(hash_result.size(), out_len);
+ output.append(hash_result, added);
+ out_len -= added;
+
+ ++counter;
+ }
+
+ return output;
+ }
+
+/*************************************************
+* KDF2 Constructor *
+*************************************************/
+KDF2::KDF2(const std::string& h_name) : hash_name(h_name)
+ {
+ if(!have_hash(hash_name))
+ throw Algorithm_Not_Found(hash_name);
+ }
+
+}
diff --git a/src/kdf/kdf2/kdf2.h b/src/kdf/kdf2/kdf2.h
new file mode 100644
index 000000000..003f0fc45
--- /dev/null
+++ b/src/kdf/kdf2/kdf2.h
@@ -0,0 +1,29 @@
+/*************************************************
+* KDF2 Header File *
+* (C) 1999-2007 Jack Lloyd *
+*************************************************/
+
+#ifndef BOTAN_KDF2_H__
+#define BOTAN_KDF2_H__
+
+#include <botan/pk_util.h>
+
+namespace Botan {
+
+/*************************************************
+* KDF2 *
+*************************************************/
+class BOTAN_DLL KDF2 : public KDF
+ {
+ public:
+ SecureVector<byte> derive(u32bit, const byte[], u32bit,
+ const byte[], u32bit) const;
+
+ KDF2(const std::string&);
+ private:
+ const std::string hash_name;
+ };
+
+}
+
+#endif
diff --git a/src/kdf/kdf2/modinfo.txt b/src/kdf/kdf2/modinfo.txt
new file mode 100644
index 000000000..7fceffb18
--- /dev/null
+++ b/src/kdf/kdf2/modinfo.txt
@@ -0,0 +1,10 @@
+realname "KDF2"
+
+define KDF2
+
+load_on auto
+
+<add>
+kdf2.cpp
+kdf2.h
+</add>