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author | Tycho <work.tycho+git@gmail.com> | 2014-01-26 15:28:51 +0100 |
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committer | Tycho <work.tycho+git@gmail.com> | 2014-01-26 15:28:51 +0100 |
commit | bed2ee22e8283a2e8bd0790a89124839319c2fc3 (patch) | |
tree | ee9e66a7b7c63995797a502f209079c1422ce9c9 /lib/cryptopp/default.cpp | |
parent | Refactored cBlockHandler::OnUse and dependents (diff) | |
parent | Merge pull request #589 from mc-server/minecartimprovements (diff) | |
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Diffstat (limited to '')
-rw-r--r-- | lib/cryptopp/default.cpp | 258 |
1 files changed, 0 insertions, 258 deletions
diff --git a/lib/cryptopp/default.cpp b/lib/cryptopp/default.cpp deleted file mode 100644 index 72940784d..000000000 --- a/lib/cryptopp/default.cpp +++ /dev/null @@ -1,258 +0,0 @@ -// default.cpp - written and placed in the public domain by Wei Dai - -#include "pch.h" -#include "default.h" -#include "queue.h" -#include <time.h> -#include <memory> - -NAMESPACE_BEGIN(CryptoPP) - -static const unsigned int MASH_ITERATIONS = 200; -static const unsigned int SALTLENGTH = 8; -static const unsigned int BLOCKSIZE = Default_BlockCipher::Encryption::BLOCKSIZE; -static const unsigned int KEYLENGTH = Default_BlockCipher::Encryption::DEFAULT_KEYLENGTH; - -// The purpose of this function Mash() is to take an arbitrary length input -// string and *deterministicly* produce an arbitrary length output string such -// that (1) it looks random, (2) no information about the input is -// deducible from it, and (3) it contains as much entropy as it can hold, or -// the amount of entropy in the input string, whichever is smaller. - -static void Mash(const byte *in, size_t inLen, byte *out, size_t outLen, int iterations) -{ - if (BytePrecision(outLen) > 2) - throw InvalidArgument("Mash: output legnth too large"); - - size_t bufSize = RoundUpToMultipleOf(outLen, (size_t)DefaultHashModule::DIGESTSIZE); - byte b[2]; - SecByteBlock buf(bufSize); - SecByteBlock outBuf(bufSize); - DefaultHashModule hash; - - unsigned int i; - for(i=0; i<outLen; i+=DefaultHashModule::DIGESTSIZE) - { - b[0] = (byte) (i >> 8); - b[1] = (byte) i; - hash.Update(b, 2); - hash.Update(in, inLen); - hash.Final(outBuf+i); - } - - while (iterations-- > 1) - { - memcpy(buf, outBuf, bufSize); - for (i=0; i<bufSize; i+=DefaultHashModule::DIGESTSIZE) - { - b[0] = (byte) (i >> 8); - b[1] = (byte) i; - hash.Update(b, 2); - hash.Update(buf, bufSize); - hash.Final(outBuf+i); - } - } - - memcpy(out, outBuf, outLen); -} - -static void GenerateKeyIV(const byte *passphrase, size_t passphraseLength, const byte *salt, size_t saltLength, byte *key, byte *IV) -{ - SecByteBlock temp(passphraseLength+saltLength); - memcpy(temp, passphrase, passphraseLength); - memcpy(temp+passphraseLength, salt, saltLength); - SecByteBlock keyIV(KEYLENGTH+BLOCKSIZE); - Mash(temp, passphraseLength + saltLength, keyIV, KEYLENGTH+BLOCKSIZE, MASH_ITERATIONS); - memcpy(key, keyIV, KEYLENGTH); - memcpy(IV, keyIV+KEYLENGTH, BLOCKSIZE); -} - -// ******************************************************** - -DefaultEncryptor::DefaultEncryptor(const char *passphrase, BufferedTransformation *attachment) - : ProxyFilter(NULL, 0, 0, attachment), m_passphrase((const byte *)passphrase, strlen(passphrase)) -{ -} - -DefaultEncryptor::DefaultEncryptor(const byte *passphrase, size_t passphraseLength, BufferedTransformation *attachment) - : ProxyFilter(NULL, 0, 0, attachment), m_passphrase(passphrase, passphraseLength) -{ -} - - -void DefaultEncryptor::FirstPut(const byte *) -{ - // VC60 workaround: __LINE__ expansion bug - CRYPTOPP_COMPILE_ASSERT_INSTANCE(SALTLENGTH <= DefaultHashModule::DIGESTSIZE, 1); - CRYPTOPP_COMPILE_ASSERT_INSTANCE(BLOCKSIZE <= DefaultHashModule::DIGESTSIZE, 2); - - SecByteBlock salt(DefaultHashModule::DIGESTSIZE), keyCheck(DefaultHashModule::DIGESTSIZE); - DefaultHashModule hash; - - // use hash(passphrase | time | clock) as salt - hash.Update(m_passphrase, m_passphrase.size()); - time_t t=time(0); - hash.Update((byte *)&t, sizeof(t)); - clock_t c=clock(); - hash.Update((byte *)&c, sizeof(c)); - hash.Final(salt); - - // use hash(passphrase | salt) as key check - hash.Update(m_passphrase, m_passphrase.size()); - hash.Update(salt, SALTLENGTH); - hash.Final(keyCheck); - - AttachedTransformation()->Put(salt, SALTLENGTH); - - // mash passphrase and salt together into key and IV - SecByteBlock key(KEYLENGTH); - SecByteBlock IV(BLOCKSIZE); - GenerateKeyIV(m_passphrase, m_passphrase.size(), salt, SALTLENGTH, key, IV); - - m_cipher.SetKeyWithIV(key, key.size(), IV); - SetFilter(new StreamTransformationFilter(m_cipher)); - - m_filter->Put(keyCheck, BLOCKSIZE); -} - -void DefaultEncryptor::LastPut(const byte *inString, size_t length) -{ - m_filter->MessageEnd(); -} - -// ******************************************************** - -DefaultDecryptor::DefaultDecryptor(const char *p, BufferedTransformation *attachment, bool throwException) - : ProxyFilter(NULL, SALTLENGTH+BLOCKSIZE, 0, attachment) - , m_state(WAITING_FOR_KEYCHECK) - , m_passphrase((const byte *)p, strlen(p)) - , m_throwException(throwException) -{ -} - -DefaultDecryptor::DefaultDecryptor(const byte *passphrase, size_t passphraseLength, BufferedTransformation *attachment, bool throwException) - : ProxyFilter(NULL, SALTLENGTH+BLOCKSIZE, 0, attachment) - , m_state(WAITING_FOR_KEYCHECK) - , m_passphrase(passphrase, passphraseLength) - , m_throwException(throwException) -{ -} - -void DefaultDecryptor::FirstPut(const byte *inString) -{ - CheckKey(inString, inString+SALTLENGTH); -} - -void DefaultDecryptor::LastPut(const byte *inString, size_t length) -{ - if (m_filter.get() == NULL) - { - m_state = KEY_BAD; - if (m_throwException) - throw KeyBadErr(); - } - else - { - m_filter->MessageEnd(); - m_state = WAITING_FOR_KEYCHECK; - } -} - -void DefaultDecryptor::CheckKey(const byte *salt, const byte *keyCheck) -{ - SecByteBlock check(STDMAX((unsigned int)2*BLOCKSIZE, (unsigned int)DefaultHashModule::DIGESTSIZE)); - - DefaultHashModule hash; - hash.Update(m_passphrase, m_passphrase.size()); - hash.Update(salt, SALTLENGTH); - hash.Final(check); - - SecByteBlock key(KEYLENGTH); - SecByteBlock IV(BLOCKSIZE); - GenerateKeyIV(m_passphrase, m_passphrase.size(), salt, SALTLENGTH, key, IV); - - m_cipher.SetKeyWithIV(key, key.size(), IV); - std::auto_ptr<StreamTransformationFilter> decryptor(new StreamTransformationFilter(m_cipher)); - - decryptor->Put(keyCheck, BLOCKSIZE); - decryptor->ForceNextPut(); - decryptor->Get(check+BLOCKSIZE, BLOCKSIZE); - - SetFilter(decryptor.release()); - - if (!VerifyBufsEqual(check, check+BLOCKSIZE, BLOCKSIZE)) - { - m_state = KEY_BAD; - if (m_throwException) - throw KeyBadErr(); - } - else - m_state = KEY_GOOD; -} - -// ******************************************************** - -static DefaultMAC * NewDefaultEncryptorMAC(const byte *passphrase, size_t passphraseLength) -{ - size_t macKeyLength = DefaultMAC::StaticGetValidKeyLength(16); - SecByteBlock macKey(macKeyLength); - // since the MAC is encrypted there is no reason to mash the passphrase for many iterations - Mash(passphrase, passphraseLength, macKey, macKeyLength, 1); - return new DefaultMAC(macKey, macKeyLength); -} - -DefaultEncryptorWithMAC::DefaultEncryptorWithMAC(const char *passphrase, BufferedTransformation *attachment) - : ProxyFilter(NULL, 0, 0, attachment) - , m_mac(NewDefaultEncryptorMAC((const byte *)passphrase, strlen(passphrase))) -{ - SetFilter(new HashFilter(*m_mac, new DefaultEncryptor(passphrase), true)); -} - -DefaultEncryptorWithMAC::DefaultEncryptorWithMAC(const byte *passphrase, size_t passphraseLength, BufferedTransformation *attachment) - : ProxyFilter(NULL, 0, 0, attachment) - , m_mac(NewDefaultEncryptorMAC(passphrase, passphraseLength)) -{ - SetFilter(new HashFilter(*m_mac, new DefaultEncryptor(passphrase, passphraseLength), true)); -} - -void DefaultEncryptorWithMAC::LastPut(const byte *inString, size_t length) -{ - m_filter->MessageEnd(); -} - -// ******************************************************** - -DefaultDecryptorWithMAC::DefaultDecryptorWithMAC(const char *passphrase, BufferedTransformation *attachment, bool throwException) - : ProxyFilter(NULL, 0, 0, attachment) - , m_mac(NewDefaultEncryptorMAC((const byte *)passphrase, strlen(passphrase))) - , m_throwException(throwException) -{ - SetFilter(new DefaultDecryptor(passphrase, m_hashVerifier=new HashVerifier(*m_mac, NULL, HashVerifier::PUT_MESSAGE), throwException)); -} - -DefaultDecryptorWithMAC::DefaultDecryptorWithMAC(const byte *passphrase, size_t passphraseLength, BufferedTransformation *attachment, bool throwException) - : ProxyFilter(NULL, 0, 0, attachment) - , m_mac(NewDefaultEncryptorMAC(passphrase, passphraseLength)) - , m_throwException(throwException) -{ - SetFilter(new DefaultDecryptor(passphrase, passphraseLength, m_hashVerifier=new HashVerifier(*m_mac, NULL, HashVerifier::PUT_MESSAGE), throwException)); -} - -DefaultDecryptor::State DefaultDecryptorWithMAC::CurrentState() const -{ - return static_cast<const DefaultDecryptor *>(m_filter.get())->CurrentState(); -} - -bool DefaultDecryptorWithMAC::CheckLastMAC() const -{ - return m_hashVerifier->GetLastResult(); -} - -void DefaultDecryptorWithMAC::LastPut(const byte *inString, size_t length) -{ - m_filter->MessageEnd(); - if (m_throwException && !CheckLastMAC()) - throw MACBadErr(); -} - -NAMESPACE_END |