diff options
Diffstat (limited to 'src/ssl3_prf.cpp')
-rw-r--r-- | src/ssl3_prf.cpp | 71 |
1 files changed, 0 insertions, 71 deletions
diff --git a/src/ssl3_prf.cpp b/src/ssl3_prf.cpp deleted file mode 100644 index a86ed8ff7..000000000 --- a/src/ssl3_prf.cpp +++ /dev/null @@ -1,71 +0,0 @@ -/************************************************* -* SSL3 PRF Source File * -* (C) 2004-2006 Jack Lloyd * -*************************************************/ - -#include <botan/kdf.h> -#include <botan/lookup.h> -#include <memory> - -namespace Botan { - -namespace { - -/************************************************* -* Return the next inner hash * -*************************************************/ -OctetString next_hash(u32bit where, u32bit want, - HashFunction* md5, HashFunction* sha1, - const byte secret[], u32bit secret_len, - const byte seed[], u32bit seed_len) - { - if(want > md5->OUTPUT_LENGTH) - throw Internal_Error("SSL3_PRF:next_hash: want is too big"); - - const byte ASCII_A_CHAR = 0x41; - - for(u32bit j = 0; j != where + 1; j++) - sha1->update(ASCII_A_CHAR + where); - sha1->update(secret, secret_len); - sha1->update(seed, seed_len); - SecureVector<byte> sha1_hash = sha1->final(); - - md5->update(secret, secret_len); - md5->update(sha1_hash); - SecureVector<byte> md5_hash = md5->final(); - - return OctetString(md5_hash, want); - } - -} - -/************************************************* -* SSL3 PRF * -*************************************************/ -SecureVector<byte> SSL3_PRF::derive(u32bit key_len, - const byte secret[], u32bit secret_len, - const byte seed[], u32bit seed_len) const - { - if(key_len > 416) - throw Internal_Error("SSL3_PRF: Requested key length is too large"); - - std::auto_ptr<HashFunction> md5(get_hash("MD5")); - std::auto_ptr<HashFunction> sha1(get_hash("SHA-1")); - - OctetString output; - - int counter = 0; - while(key_len) - { - const u32bit produce = std::min(key_len, md5->OUTPUT_LENGTH); - - output = output + next_hash(counter++, produce, md5.get(), sha1.get(), - secret, secret_len, seed, seed_len); - - key_len -= produce; - } - - return output.bits_of(); - } - -} |