diff options
Diffstat (limited to 'src/kdf/kdf2')
-rw-r--r-- | src/kdf/kdf2/kdf2.cpp | 51 | ||||
-rw-r--r-- | src/kdf/kdf2/kdf2.h | 29 | ||||
-rw-r--r-- | src/kdf/kdf2/modinfo.txt | 10 |
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> |