diff options
author | lloyd <[email protected]> | 2011-06-03 14:19:16 +0000 |
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committer | lloyd <[email protected]> | 2011-06-03 14:19:16 +0000 |
commit | 4e760a188e8cc280277dfdd44253ca1ad6252b7f (patch) | |
tree | 70ce95fb10981900d28fcb0b58127e707dbd8c3e /src/kdf/prf_ssl3 | |
parent | 7aaa90c33101a729e7ef3b888562f8dcbe68372d (diff) |
Rename some dirs for shorter object files where configure will
coalesce the dir and file name if identical.
Diffstat (limited to 'src/kdf/prf_ssl3')
-rw-r--r-- | src/kdf/prf_ssl3/info.txt | 7 | ||||
-rw-r--r-- | src/kdf/prf_ssl3/prf_ssl3.cpp | 76 | ||||
-rw-r--r-- | src/kdf/prf_ssl3/prf_ssl3.h | 30 |
3 files changed, 113 insertions, 0 deletions
diff --git a/src/kdf/prf_ssl3/info.txt b/src/kdf/prf_ssl3/info.txt new file mode 100644 index 000000000..0ef297119 --- /dev/null +++ b/src/kdf/prf_ssl3/info.txt @@ -0,0 +1,7 @@ +define SSL_V3_PRF + +<requires> +md5 +sha1 +algo_base +</requires> diff --git a/src/kdf/prf_ssl3/prf_ssl3.cpp b/src/kdf/prf_ssl3/prf_ssl3.cpp new file mode 100644 index 000000000..72cf023e2 --- /dev/null +++ b/src/kdf/prf_ssl3/prf_ssl3.cpp @@ -0,0 +1,76 @@ +/* +* SSLv3 PRF +* (C) 2004-2006 Jack Lloyd +* +* Distributed under the terms of the Botan license +*/ + +#include <botan/prf_ssl3.h> +#include <botan/symkey.h> +#include <botan/exceptn.h> +#include <botan/sha160.h> +#include <botan/md5.h> +#include <botan/internal/assert.h> +#include <memory> + +namespace Botan { + +namespace { + +/* +* Return the next inner hash +*/ +OctetString next_hash(size_t where, size_t want, + HashFunction& md5, HashFunction& sha1, + const byte secret[], size_t secret_len, + const byte seed[], size_t seed_len) + { + BOTAN_ASSERT(want <= md5.output_length(), "Desired output too large"); + + const byte ASCII_A_CHAR = 0x41; + + for(size_t j = 0; j != where + 1; j++) + sha1.update(static_cast<byte>(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[0], want); + } + +} + +/* +* SSL3 PRF +*/ +SecureVector<byte> SSL3_PRF::derive(size_t key_len, + const byte secret[], size_t secret_len, + const byte seed[], size_t seed_len) const + { + if(key_len > 416) + throw Invalid_Argument("SSL3_PRF: Requested key length is too large"); + + MD5 md5; + SHA_160 sha1; + + OctetString output; + + int counter = 0; + while(key_len) + { + const size_t produce = std::min<size_t>(key_len, md5.output_length()); + + output = output + next_hash(counter++, produce, md5, sha1, + secret, secret_len, seed, seed_len); + + key_len -= produce; + } + + return output.bits_of(); + } + +} diff --git a/src/kdf/prf_ssl3/prf_ssl3.h b/src/kdf/prf_ssl3/prf_ssl3.h new file mode 100644 index 000000000..b07454be2 --- /dev/null +++ b/src/kdf/prf_ssl3/prf_ssl3.h @@ -0,0 +1,30 @@ +/* +* SSLv3 PRF +* (C) 1999-2007 Jack Lloyd +* +* Distributed under the terms of the Botan license +*/ + +#ifndef BOTAN_SSLV3_PRF_H__ +#define BOTAN_SSLV3_PRF_H__ + +#include <botan/kdf.h> + +namespace Botan { + +/** +* PRF used in SSLv3 +*/ +class BOTAN_DLL SSL3_PRF : public KDF + { + public: + SecureVector<byte> derive(size_t, const byte[], size_t, + const byte[], size_t) const; + + std::string name() const { return "SSL3-PRF"; } + KDF* clone() const { return new SSL3_PRF; } + }; + +} + +#endif |