39 lines
1.5 KiB
C++
39 lines
1.5 KiB
C++
////////////////////////////////////////////////////////////////////////////////
|
|
// Copyright 2016 Google Inc.
|
|
//
|
|
// This software is licensed under the terms defined in the Widevine Master
|
|
// License Agreement. For a copy of this agreement, please contact
|
|
// widevine-licensing@google.com.
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef COMMON_AES_CBC_UTIL_H_
|
|
#define COMMON_AES_CBC_UTIL_H_
|
|
|
|
#include <string>
|
|
|
|
namespace widevine {
|
|
namespace crypto_util {
|
|
|
|
// Helper for wrapping AES CBC encryption. Uses PKCS5 padding.
|
|
std::string EncryptAesCbc(const std::string& key, const std::string& iv,
|
|
const std::string& plaintext);
|
|
|
|
// Helper for common Keybox decrypt operations; wraps AES-CBC. Returns an
|
|
// empty std::string on error or the plaintext on success. Uses PKCS5 padding.
|
|
std::string DecryptAesCbc(const std::string& key, const std::string& iv,
|
|
const std::string& ciphertext);
|
|
|
|
// Helper for common Keybox decrypt operations; wraps AES-CBC. Returns an
|
|
// empty std::string on error or the plaintext on success.
|
|
// Uses no padding; fails if the ciphertext is not a multiple of 16 bytes.
|
|
// This is used to decrypt the encrypted blob in the WVM keyboxes, with
|
|
// a zero iv.
|
|
std::string DecryptAesCbcNoPad(const std::string& key, const std::string& iv,
|
|
const std::string& ciphertext);
|
|
|
|
} // namespace crypto_util
|
|
} // namespace widevine
|
|
|
|
#endif // COMMON_AES_CBC_UTIL_H_
|
|
|