Initial source release: v2.0.8-0-679

Change-Id: Idf6316a8faf4b4fdc54265aad12084e5aa60707a

core/include/privacy_crypto.h

@@ -0,0 +1,74 @@
+// Copyright 2013 Google Inc. All Rights Reserved.
+//
+// Description:
+//   Declaration of classes representing AES and RSA public keys used
+//   for signature verification and encryption.
+//
+// AES encryption details:
+//   Algorithm: AES-CBC
+//
+// RSA signature details:
+//   Algorithm: RSASSA-PSS
+//   Hash algorithm: SHA1
+//   Mask generation function: mgf1SHA1
+//   Salt length: 20 bytes
+//   Trailer field: 0xbc
+//
+// RSA encryption details:
+//   Algorithm: RSA-OAEP
+//   Mask generation function: mgf1SHA1
+//   Label (encoding paramter): empty string
+//
+#ifndef WVCDM_CORE_PRIVACY_CRYPTO_H_
+#define WVCDM_CORE_PRIVACY_CRYPTO_H_
+
+#include <string>
+
+#include "openssl/evp.h"
+#include "openssl/rsa.h"
+#include "wv_cdm_types.h"
+
+namespace wvcdm {
+
+class AesCbcKey {
+ public:
+  AesCbcKey() : initialized_(false) {};
+  ~AesCbcKey() {};
+
+  bool Init(const std::string& key);
+  bool Encrypt(const std::string& in, std::string* out, std::string* iv);
+
+ private:
+  EVP_CIPHER_CTX ctx_;
+  bool initialized_;
+
+  CORE_DISALLOW_COPY_AND_ASSIGN(AesCbcKey);
+};
+
+class RsaPublicKey {
+ public:
+  RsaPublicKey() : key_(NULL) {}
+  ~RsaPublicKey();
+
+  // Initializes an RsaPublicKey object using a DER encoded PKCS#1 RSAPublicKey
+  bool Init(const std::string& serialized_key);
+
+  // Encrypt a message using RSA-OAEP. Caller retains ownership of all
+  // parameters. Returns true if successful, false otherwise.
+  bool Encrypt(const std::string& plaintext,
+               std::string* ciphertext);
+
+  // Verify RSSASSA-PSS signature. Caller retains ownership of all parameters.
+  // Returns true if validation succeeds, false otherwise.
+  bool VerifySignature(const std::string& message,
+                       const std::string& signature);
+
+ private:
+  RSA* key_;
+
+  CORE_DISALLOW_COPY_AND_ASSIGN(RsaPublicKey);
+};
+
+}  // namespace wvcdm
+
+#endif  // WVCDM_CORE_PRIVACY_CRYPTO_H_