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author | Howaner <franzi.moos@googlemail.com> | 2014-05-07 12:54:58 +0200 |
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committer | Howaner <franzi.moos@googlemail.com> | 2014-05-07 12:54:58 +0200 |
commit | f5fe3682201e2f1356e3a5c408eb8296b542e072 (patch) | |
tree | 208ec7a760b9e909fbb43e1a12ee43d866cb9df7 /src/Crypto.cpp | |
parent | Remove old import (diff) | |
parent | Fixed wires powering wires diagonally below them (diff) | |
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Diffstat (limited to 'src/Crypto.cpp')
-rw-r--r-- | src/Crypto.cpp | 509 |
1 files changed, 0 insertions, 509 deletions
diff --git a/src/Crypto.cpp b/src/Crypto.cpp deleted file mode 100644 index 26500f263..000000000 --- a/src/Crypto.cpp +++ /dev/null @@ -1,509 +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; -*/ - - - - - - -/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// -// cRSAPrivateKey: - -cRSAPrivateKey::cRSAPrivateKey(void) -{ - rsa_init(&m_Rsa, RSA_PKCS_V15, 0); - InitRnd(); -} - - - - - -cRSAPrivateKey::cRSAPrivateKey(const cRSAPrivateKey & a_Other) -{ - rsa_init(&m_Rsa, RSA_PKCS_V15, 0); - rsa_copy(&m_Rsa, &a_Other.m_Rsa); - InitRnd(); -} - - - - - -cRSAPrivateKey::~cRSAPrivateKey() -{ - entropy_free(&m_Entropy); - rsa_free(&m_Rsa); -} - - - - - -void cRSAPrivateKey::InitRnd(void) -{ - entropy_init(&m_Entropy); - const unsigned char pers[] = "rsa_genkey"; - ctr_drbg_init(&m_Ctr_drbg, entropy_func, &m_Entropy, pers, sizeof(pers) - 1); -} - - - - - -bool cRSAPrivateKey::Generate(unsigned a_KeySizeBits) -{ - if (rsa_gen_key(&m_Rsa, ctr_drbg_random, &m_Ctr_drbg, a_KeySizeBits, 65537) != 0) - { - // Key generation failed - return false; - } - - return true; -} - - - - - -AString cRSAPrivateKey::GetPubKeyDER(void) -{ - class cPubKey - { - public: - cPubKey(rsa_context * a_Rsa) : - m_IsValid(false) - { - pk_init(&m_Key); - if (pk_init_ctx(&m_Key, pk_info_from_type(POLARSSL_PK_RSA)) != 0) - { - ASSERT(!"Cannot init PrivKey context"); - return; - } - if (rsa_copy(pk_rsa(m_Key), a_Rsa) != 0) - { - ASSERT(!"Cannot copy PrivKey to PK context"); - return; - } - m_IsValid = true; - } - - ~cPubKey() - { - if (m_IsValid) - { - pk_free(&m_Key); - } - } - - operator pk_context * (void) { return &m_Key; } - - protected: - bool m_IsValid; - pk_context m_Key; - } PkCtx(&m_Rsa); - - unsigned char buf[3000]; - int res = pk_write_pubkey_der(PkCtx, buf, sizeof(buf)); - if (res < 0) - { - return AString(); - } - return AString((const char *)(buf + sizeof(buf) - res), (size_t)res); -} - - - - - -int cRSAPrivateKey::Decrypt(const Byte * a_EncryptedData, size_t a_EncryptedLength, Byte * a_DecryptedData, size_t a_DecryptedMaxLength) -{ - if (a_EncryptedLength < m_Rsa.len) - { - LOGD("%s: Invalid a_EncryptedLength: got %u, exp at least %u", - __FUNCTION__, (unsigned)a_EncryptedLength, (unsigned)(m_Rsa.len) - ); - ASSERT(!"Invalid a_DecryptedMaxLength!"); - return -1; - } - if (a_DecryptedMaxLength < m_Rsa.len) - { - LOGD("%s: Invalid a_DecryptedMaxLength: got %u, exp at least %u", - __FUNCTION__, (unsigned)a_EncryptedLength, (unsigned)(m_Rsa.len) - ); - ASSERT(!"Invalid a_DecryptedMaxLength!"); - return -1; - } - size_t DecryptedLength; - int res = rsa_pkcs1_decrypt( - &m_Rsa, ctr_drbg_random, &m_Ctr_drbg, RSA_PRIVATE, &DecryptedLength, - a_EncryptedData, a_DecryptedData, a_DecryptedMaxLength - ); - if (res != 0) - { - return -1; - } - return (int)DecryptedLength; -} - - - - - -int cRSAPrivateKey::Encrypt(const Byte * a_PlainData, size_t a_PlainLength, Byte * a_EncryptedData, size_t a_EncryptedMaxLength) -{ - if (a_EncryptedMaxLength < m_Rsa.len) - { - LOGD("%s: Invalid a_EncryptedMaxLength: got %u, exp at least %u", - __FUNCTION__, (unsigned)a_EncryptedMaxLength, (unsigned)(m_Rsa.len) - ); - ASSERT(!"Invalid a_DecryptedMaxLength!"); - return -1; - } - if (a_EncryptedMaxLength < m_Rsa.len) - { - LOGD("%s: Invalid a_PlainLength: got %u, exp at least %u", - __FUNCTION__, (unsigned)a_PlainLength, (unsigned)(m_Rsa.len) - ); - ASSERT(!"Invalid a_PlainLength!"); - return -1; - } - int res = rsa_pkcs1_encrypt( - &m_Rsa, ctr_drbg_random, &m_Ctr_drbg, RSA_PRIVATE, - a_PlainLength, a_PlainData, a_EncryptedData - ); - if (res != 0) - { - return -1; - } - return (int)m_Rsa.len; -} - - - - - -/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// -// cPublicKey: - -cPublicKey::cPublicKey(const AString & a_PublicKeyDER) -{ - pk_init(&m_Pk); - if (pk_parse_public_key(&m_Pk, (const Byte *)a_PublicKeyDER.data(), a_PublicKeyDER.size()) != 0) - { - ASSERT(!"Cannot parse PubKey"); - return; - } - InitRnd(); -} - - - - - -cPublicKey::~cPublicKey() -{ - pk_free(&m_Pk); -} - - - - - -int cPublicKey::Decrypt(const Byte * a_EncryptedData, size_t a_EncryptedLength, Byte * a_DecryptedData, size_t a_DecryptedMaxLength) -{ - size_t DecryptedLen = a_DecryptedMaxLength; - int res = pk_decrypt(&m_Pk, - a_EncryptedData, a_EncryptedLength, - a_DecryptedData, &DecryptedLen, a_DecryptedMaxLength, - ctr_drbg_random, &m_Ctr_drbg - ); - if (res != 0) - { - return res; - } - return (int)DecryptedLen; -} - - - - - -int cPublicKey::Encrypt(const Byte * a_PlainData, size_t a_PlainLength, Byte * a_EncryptedData, size_t a_EncryptedMaxLength) -{ - size_t EncryptedLength = a_EncryptedMaxLength; - int res = pk_encrypt(&m_Pk, - a_PlainData, a_PlainLength, a_EncryptedData, &EncryptedLength, a_EncryptedMaxLength, - ctr_drbg_random, &m_Ctr_drbg - ); - if (res != 0) - { - return res; - } - return (int)EncryptedLength; -} - - - - - -void cPublicKey::InitRnd(void) -{ - entropy_init(&m_Entropy); - const unsigned char pers[] = "rsa_genkey"; - ctr_drbg_init(&m_Ctr_drbg, entropy_func, &m_Entropy, pers, sizeof(pers) - 1); -} - - - - - -/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// -// 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; -} - - - - |