diff options
Diffstat (limited to 'chromium/third_party/tlslite/tlslite/utils/OpenSSL_TripleDES.py')
| -rw-r--r-- | chromium/third_party/tlslite/tlslite/utils/OpenSSL_TripleDES.py | 44 |
1 files changed, 0 insertions, 44 deletions
diff --git a/chromium/third_party/tlslite/tlslite/utils/OpenSSL_TripleDES.py b/chromium/third_party/tlslite/tlslite/utils/OpenSSL_TripleDES.py deleted file mode 100644 index f5ba1656521..00000000000 --- a/chromium/third_party/tlslite/tlslite/utils/OpenSSL_TripleDES.py +++ /dev/null @@ -1,44 +0,0 @@ -"""OpenSSL/M2Crypto 3DES implementation.""" - -from cryptomath import * -from TripleDES import * - -if m2cryptoLoaded: - - def new(key, mode, IV): - return OpenSSL_TripleDES(key, mode, IV) - - class OpenSSL_TripleDES(TripleDES): - - def __init__(self, key, mode, IV): - TripleDES.__init__(self, key, mode, IV, "openssl") - self.key = key - self.IV = IV - - def _createContext(self, encrypt): - context = m2.cipher_ctx_new() - cipherType = m2.des_ede3_cbc() - m2.cipher_init(context, cipherType, self.key, self.IV, encrypt) - return context - - def encrypt(self, plaintext): - TripleDES.encrypt(self, plaintext) - context = self._createContext(1) - ciphertext = m2.cipher_update(context, plaintext) - m2.cipher_ctx_free(context) - self.IV = ciphertext[-self.block_size:] - return ciphertext - - def decrypt(self, ciphertext): - TripleDES.decrypt(self, ciphertext) - context = self._createContext(0) - #I think M2Crypto has a bug - it fails to decrypt and return the last block passed in. - #To work around this, we append sixteen zeros to the string, below: - plaintext = m2.cipher_update(context, ciphertext+('\0'*16)) - - #If this bug is ever fixed, then plaintext will end up having a garbage - #plaintext block on the end. That's okay - the below code will ignore it. - plaintext = plaintext[:len(ciphertext)] - m2.cipher_ctx_free(context) - self.IV = ciphertext[-self.block_size:] - return plaintext
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