diff options
Diffstat (limited to 'src/Crypto.cpp')
| -rw-r--r-- | src/Crypto.cpp | 257 |
1 files changed, 0 insertions, 257 deletions
diff --git a/src/Crypto.cpp b/src/Crypto.cpp deleted file mode 100644 index 370b498bf..000000000 --- a/src/Crypto.cpp +++ /dev/null @@ -1,257 +0,0 @@ - -// Crypto.cpp - -// Implements classes that wrap the cryptographic code library - -#include "Globals.h" -#include "Crypto.h" - -#include "polarssl/pk.h" - - - - - -/* -// Self-test the hash formatting for known values: -// sha1(Notch) : 4ed1f46bbe04bc756bcb17c0c7ce3e4632f06a48 -// sha1(jeb_) : -7c9d5b0044c130109a5d7b5fb5c317c02b4e28c1 -// sha1(simon) : 88e16a1019277b15d58faf0541e11910eb756f6 - -class Test -{ -public: - Test(void) - { - AString DigestNotch, DigestJeb, DigestSimon; - Byte Digest[20]; - cSHA1Checksum Checksum; - Checksum.Update((const Byte *)"Notch", 5); - Checksum.Finalize(Digest); - cSHA1Checksum::DigestToJava(Digest, DigestNotch); - Checksum.Restart(); - Checksum.Update((const Byte *)"jeb_", 4); - Checksum.Finalize(Digest); - cSHA1Checksum::DigestToJava(Digest, DigestJeb); - Checksum.Restart(); - Checksum.Update((const Byte *)"simon", 5); - Checksum.Finalize(Digest); - cSHA1Checksum::DigestToJava(Digest, DigestSimon); - printf("Notch: \"%s\"\n", DigestNotch.c_str()); - printf("jeb_: \"%s\"\n", DigestJeb.c_str()); - printf("simon: \"%s\"\n", DigestSimon.c_str()); - assert(DigestNotch == "4ed1f46bbe04bc756bcb17c0c7ce3e4632f06a48"); - assert(DigestJeb == "-7c9d5b0044c130109a5d7b5fb5c317c02b4e28c1"); - assert(DigestSimon == "88e16a1019277b15d58faf0541e11910eb756f6"); - } -} test; -*/ - - - - - - -/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// -// cAESCFBDecryptor: - -cAESCFBDecryptor::cAESCFBDecryptor(void) : - m_IVOffset(0), - m_IsValid(false) -{ -} - - - - - -cAESCFBDecryptor::~cAESCFBDecryptor() -{ - // Clear the leftover in-memory data, so that they can't be accessed by a backdoor - memset(&m_Aes, 0, sizeof(m_Aes)); -} - - - - - -void cAESCFBDecryptor::Init(const Byte a_Key[16], const Byte a_IV[16]) -{ - ASSERT(!IsValid()); // Cannot Init twice - - memcpy(m_IV, a_IV, 16); - aes_setkey_enc(&m_Aes, a_Key, 128); - m_IsValid = true; -} - - - - - -void cAESCFBDecryptor::ProcessData(Byte * a_DecryptedOut, const Byte * a_EncryptedIn, size_t a_Length) -{ - ASSERT(IsValid()); // Must Init() first - - // PolarSSL doesn't support AES-CFB8, need to implement it manually: - for (size_t i = 0; i < a_Length; i++) - { - Byte Buffer[sizeof(m_IV)]; - aes_crypt_ecb(&m_Aes, AES_ENCRYPT, m_IV, Buffer); - for (size_t idx = 0; idx < sizeof(m_IV) - 1; idx++) - { - m_IV[idx] = m_IV[idx + 1]; - } - m_IV[sizeof(m_IV) - 1] = a_EncryptedIn[i]; - a_DecryptedOut[i] = a_EncryptedIn[i] ^ Buffer[0]; - } -} - - - - - -/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// -// cAESCFBEncryptor: - -cAESCFBEncryptor::cAESCFBEncryptor(void) : - m_IVOffset(0), - m_IsValid(false) -{ -} - - - - - -cAESCFBEncryptor::~cAESCFBEncryptor() -{ - // Clear the leftover in-memory data, so that they can't be accessed by a backdoor - memset(&m_Aes, 0, sizeof(m_Aes)); -} - - - - - -void cAESCFBEncryptor::Init(const Byte a_Key[16], const Byte a_IV[16]) -{ - ASSERT(!IsValid()); // Cannot Init twice - ASSERT(m_IVOffset == 0); - - memcpy(m_IV, a_IV, 16); - aes_setkey_enc(&m_Aes, a_Key, 128); - m_IsValid = true; -} - - - - - -void cAESCFBEncryptor::ProcessData(Byte * a_EncryptedOut, const Byte * a_PlainIn, size_t a_Length) -{ - ASSERT(IsValid()); // Must Init() first - - // PolarSSL doesn't do AES-CFB8, so we need to implement it ourselves: - for (size_t i = 0; i < a_Length; i++) - { - Byte Buffer[sizeof(m_IV)]; - aes_crypt_ecb(&m_Aes, AES_ENCRYPT, m_IV, Buffer); - for (size_t idx = 0; idx < sizeof(m_IV) - 1; idx++) - { - m_IV[idx] = m_IV[idx + 1]; - } - a_EncryptedOut[i] = a_PlainIn[i] ^ Buffer[0]; - m_IV[sizeof(m_IV) - 1] = a_EncryptedOut[i]; - } -} - - - - - -/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// -// cSHA1Checksum: - -cSHA1Checksum::cSHA1Checksum(void) : - m_DoesAcceptInput(true) -{ - sha1_starts(&m_Sha1); -} - - - - - -void cSHA1Checksum::Update(const Byte * a_Data, size_t a_Length) -{ - ASSERT(m_DoesAcceptInput); // Not Finalize()-d yet, or Restart()-ed - - sha1_update(&m_Sha1, a_Data, a_Length); -} - - - - - -void cSHA1Checksum::Finalize(cSHA1Checksum::Checksum & a_Output) -{ - ASSERT(m_DoesAcceptInput); // Not Finalize()-d yet, or Restart()-ed - - sha1_finish(&m_Sha1, a_Output); - m_DoesAcceptInput = false; -} - - - - - -void cSHA1Checksum::DigestToJava(const Checksum & a_Digest, AString & a_Out) -{ - Checksum Digest; - memcpy(Digest, a_Digest, sizeof(Digest)); - - bool IsNegative = (Digest[0] >= 0x80); - if (IsNegative) - { - // Two's complement: - bool carry = true; // Add one to the whole number - for (int i = 19; i >= 0; i--) - { - Digest[i] = ~Digest[i]; - if (carry) - { - carry = (Digest[i] == 0xff); - Digest[i]++; - } - } - } - a_Out.clear(); - a_Out.reserve(40); - for (int i = 0; i < 20; i++) - { - AppendPrintf(a_Out, "%02x", Digest[i]); - } - while ((a_Out.length() > 0) && (a_Out[0] == '0')) - { - a_Out.erase(0, 1); - } - if (IsNegative) - { - a_Out.insert(0, "-"); - } -} - - - - - - -void cSHA1Checksum::Restart(void) -{ - sha1_starts(&m_Sha1); - m_DoesAcceptInput = true; -} - - - - |