third_party/blink/public/platform/web_crypto_algorithm_params.h - chromium/src - Git at Google

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
  * copyright notice, this list of conditions and the following disclaimer
  * in the documentation and/or other materials provided with the
  * distribution.
  *     * Neither the name of Google Inc. nor the names of its
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */

 #ifndef THIRD_PARTY_BLINK_PUBLIC_PLATFORM_WEB_CRYPTO_ALGORITHM_PARAMS_H_
 #define THIRD_PARTY_BLINK_PUBLIC_PLATFORM_WEB_CRYPTO_ALGORITHM_PARAMS_H_

 #include "base/logging.h"
 #include "third_party/blink/public/platform/web_common.h"
 #include "third_party/blink/public/platform/web_crypto_algorithm.h"
 #include "third_party/blink/public/platform/web_crypto_key.h"
 #include "third_party/blink/public/platform/web_vector.h"

 namespace blink {

 // NOTE: For documentation on the meaning of each of the parameters see the
 //       Web crypto spec:
 //
 //       http://www.w3.org/TR/WebCryptoAPI
 //
 //       For the most part, the parameters in the spec have the same name,
 //       except that in the blink code:
 //
 //         - Structure names are prefixed by "WebCrypto"
 //         - Optional fields are prefixed by "optional"
 //         - Data length properties are suffixed by either "Bits" or "Bytes"

 class WebCryptoAlgorithmParams {
  public:
   WebCryptoAlgorithmParams() = default;
   virtual ~WebCryptoAlgorithmParams() = default;
   virtual WebCryptoAlgorithmParamsType GetType() const = 0;
 };

 class WebCryptoAesCbcParams : public WebCryptoAlgorithmParams {
  public:
   explicit WebCryptoAesCbcParams(WebVector<unsigned char> iv)
       : iv_(std::move(iv)) {}

   WebCryptoAlgorithmParamsType GetType() const override {
     return kWebCryptoAlgorithmParamsTypeAesCbcParams;
   }

   const WebVector<unsigned char>& Iv() const { return iv_; }

  private:
   const WebVector<unsigned char> iv_;
 };

 class WebCryptoAlgorithmParamsWithHash : public WebCryptoAlgorithmParams {
  public:
   explicit WebCryptoAlgorithmParamsWithHash(const WebCryptoAlgorithm& hash)
       : hash_(hash) {
     DCHECK(!hash.IsNull());
   }

   const WebCryptoAlgorithm& GetHash() const { return hash_; }

  private:
   const WebCryptoAlgorithm hash_;
 };

 class WebCryptoAesCtrParams : public WebCryptoAlgorithmParams {
  public:
   WebCryptoAesCtrParams(unsigned char length_bits,
                         WebVector<unsigned char> counter)
       : WebCryptoAlgorithmParams(),
         counter_(std::move(counter)),
         length_bits_(length_bits) {}

   WebCryptoAlgorithmParamsType GetType() const override {
     return kWebCryptoAlgorithmParamsTypeAesCtrParams;
   }

   const WebVector<unsigned char>& Counter() const { return counter_; }
   unsigned char LengthBits() const { return length_bits_; }

  private:
   const WebVector<unsigned char> counter_;
   const unsigned char length_bits_;
 };

 class WebCryptoAesKeyGenParams : public WebCryptoAlgorithmParams {
  public:
   explicit WebCryptoAesKeyGenParams(uint16_t length_bits)
       : length_bits_(length_bits) {}

   WebCryptoAlgorithmParamsType GetType() const override {
     return kWebCryptoAlgorithmParamsTypeAesKeyGenParams;
   }

   uint16_t LengthBits() const { return length_bits_; }

  private:
   const uint16_t length_bits_;
 };

 class WebCryptoHmacImportParams : public WebCryptoAlgorithmParamsWithHash {
  public:
   // FIXME: Remove this constructor once it is no longer used by Chromium.
   // http://crbug.com/431085
   explicit WebCryptoHmacImportParams(const WebCryptoAlgorithm& hash)
       : WebCryptoAlgorithmParamsWithHash(hash),
         has_length_bits_(false),
         optional_length_bits_(0) {}

   WebCryptoHmacImportParams(const WebCryptoAlgorithm& hash,
                             bool has_length_bits,
                             unsigned length_bits)
       : WebCryptoAlgorithmParamsWithHash(hash),
         has_length_bits_(has_length_bits),
         optional_length_bits_(length_bits) {
     DCHECK(has_length_bits || !length_bits);
   }

   WebCryptoAlgorithmParamsType GetType() const override {
     return kWebCryptoAlgorithmParamsTypeHmacImportParams;
   }

   bool HasLengthBits() const { return has_length_bits_; }

   unsigned OptionalLengthBits() const { return optional_length_bits_; }

  private:
   const bool has_length_bits_;
   const unsigned optional_length_bits_;
 };

 class WebCryptoHmacKeyGenParams : public WebCryptoAlgorithmParamsWithHash {
  public:
   WebCryptoHmacKeyGenParams(const WebCryptoAlgorithm& hash,
                             bool has_length_bits,
                             unsigned length_bits)
       : WebCryptoAlgorithmParamsWithHash(hash),
         has_length_bits_(has_length_bits),
         optional_length_bits_(length_bits) {
     DCHECK(has_length_bits || !length_bits);
   }

   WebCryptoAlgorithmParamsType GetType() const override {
     return kWebCryptoAlgorithmParamsTypeHmacKeyGenParams;
   }

   bool HasLengthBits() const { return has_length_bits_; }

   unsigned OptionalLengthBits() const { return optional_length_bits_; }

  private:
   const bool has_length_bits_;
   const unsigned optional_length_bits_;
 };

 class WebCryptoAesGcmParams : public WebCryptoAlgorithmParams {
  public:
   WebCryptoAesGcmParams(WebVector<unsigned char> iv,
                         bool has_additional_data,
                         WebVector<unsigned char> additional_data,
                         bool has_tag_length_bits,
                         unsigned char tag_length_bits)
       : iv_(std::move(iv)),
         has_additional_data_(has_additional_data),
         optional_additional_data_(std::move(additional_data)),
         has_tag_length_bits_(has_tag_length_bits),
         optional_tag_length_bits_(tag_length_bits) {
     DCHECK(has_additional_data || optional_additional_data_.empty());
     DCHECK(has_tag_length_bits || !tag_length_bits);
   }

   WebCryptoAlgorithmParamsType GetType() const override {
     return kWebCryptoAlgorithmParamsTypeAesGcmParams;
   }

   const WebVector<unsigned char>& Iv() const { return iv_; }

   bool HasAdditionalData() const { return has_additional_data_; }
   const WebVector<unsigned char>& OptionalAdditionalData() const {
     return optional_additional_data_;
   }

   bool HasTagLengthBits() const { return has_tag_length_bits_; }
   unsigned OptionalTagLengthBits() const { return optional_tag_length_bits_; }

  private:
   const WebVector<unsigned char> iv_;
   const bool has_additional_data_;
   const WebVector<unsigned char> optional_additional_data_;
   const bool has_tag_length_bits_;
   const unsigned char optional_tag_length_bits_;
 };

 class WebCryptoRsaHashedImportParams : public WebCryptoAlgorithmParamsWithHash {
  public:
   explicit WebCryptoRsaHashedImportParams(const WebCryptoAlgorithm& hash)
       : WebCryptoAlgorithmParamsWithHash(hash) {}

   WebCryptoAlgorithmParamsType GetType() const override {
     return kWebCryptoAlgorithmParamsTypeRsaHashedImportParams;
   }
 };

 class WebCryptoRsaHashedKeyGenParams : public WebCryptoAlgorithmParams {
  public:
   WebCryptoRsaHashedKeyGenParams(const WebCryptoAlgorithm& hash,
                                  unsigned modulus_length_bits,
                                  WebVector<unsigned char> public_exponent)
       : modulus_length_bits_(modulus_length_bits),
         public_exponent_(std::move(public_exponent)),
         hash_(hash) {
     DCHECK(!hash.IsNull());
   }

   WebCryptoAlgorithmParamsType GetType() const override {
     return kWebCryptoAlgorithmParamsTypeRsaHashedKeyGenParams;
   }

   unsigned ModulusLengthBits() const { return modulus_length_bits_; }
   const WebVector<unsigned char>& PublicExponent() const {
     return public_exponent_;
   }
   const WebCryptoAlgorithm& GetHash() const { return hash_; }

   // Converts the public exponent (big-endian WebCrypto BigInteger),
   // with or without leading zeros, to unsigned int. Returns true on success.
   bool ConvertPublicExponentToUnsigned(unsigned& result) const {
     result = 0;
     for (size_t i = 0; i < public_exponent_.size(); ++i) {
       size_t i_reversed = public_exponent_.size() - i - 1;

       if (i_reversed >= sizeof(result) && public_exponent_[i])
         return false;  // Too large for unsigned int.

       result |= public_exponent_[i] << 8 * i_reversed;
     }
     return true;
   }

  private:
   const unsigned modulus_length_bits_;
   const WebVector<unsigned char> public_exponent_;
   const WebCryptoAlgorithm hash_;
 };

 class WebCryptoRsaOaepParams : public WebCryptoAlgorithmParams {
  public:
   WebCryptoRsaOaepParams(bool has_label, WebVector<unsigned char> label)
       : has_label_(has_label), optional_label_(std::move(label)) {
     DCHECK(has_label || optional_label_.empty());
   }

   WebCryptoAlgorithmParamsType GetType() const override {
     return kWebCryptoAlgorithmParamsTypeRsaOaepParams;
   }

   bool HasLabel() const { return has_label_; }
   const WebVector<unsigned char>& OptionalLabel() const {
     return optional_label_;
   }

  private:
   const bool has_label_;
   const WebVector<unsigned char> optional_label_;
 };

 class WebCryptoRsaPssParams : public WebCryptoAlgorithmParams {
  public:
   explicit WebCryptoRsaPssParams(unsigned salt_length_bytes)
       : salt_length_bytes_(salt_length_bytes) {}

   WebCryptoAlgorithmParamsType GetType() const override {
     return kWebCryptoAlgorithmParamsTypeRsaPssParams;
   }

   unsigned SaltLengthBytes() const { return salt_length_bytes_; }

  private:
   const unsigned salt_length_bytes_;
 };

 class WebCryptoEcdsaParams : public WebCryptoAlgorithmParamsWithHash {
  public:
   explicit WebCryptoEcdsaParams(const WebCryptoAlgorithm& hash)
       : WebCryptoAlgorithmParamsWithHash(hash) {}

   WebCryptoAlgorithmParamsType GetType() const override {
     return kWebCryptoAlgorithmParamsTypeEcdsaParams;
   }
 };

 class WebCryptoEcKeyGenParams : public WebCryptoAlgorithmParams {
  public:
   explicit WebCryptoEcKeyGenParams(WebCryptoNamedCurve named_curve)
       : named_curve_(named_curve) {}

   WebCryptoAlgorithmParamsType GetType() const override {
     return kWebCryptoAlgorithmParamsTypeEcKeyGenParams;
   }

   WebCryptoNamedCurve NamedCurve() const { return named_curve_; }

  private:
   const WebCryptoNamedCurve named_curve_;
 };

 class WebCryptoEcKeyImportParams : public WebCryptoAlgorithmParams {
  public:
   explicit WebCryptoEcKeyImportParams(WebCryptoNamedCurve named_curve)
       : named_curve_(named_curve) {}

   WebCryptoAlgorithmParamsType GetType() const override {
     return kWebCryptoAlgorithmParamsTypeEcKeyImportParams;
   }

   WebCryptoNamedCurve NamedCurve() const { return named_curve_; }

  private:
   const WebCryptoNamedCurve named_curve_;
 };

 class WebCryptoEcdhKeyDeriveParams : public WebCryptoAlgorithmParams {
  public:
   explicit WebCryptoEcdhKeyDeriveParams(const WebCryptoKey& public_key)
       : public_key_(public_key) {}

   WebCryptoAlgorithmParamsType GetType() const override {
     return kWebCryptoAlgorithmParamsTypeEcdhKeyDeriveParams;
   }

   const WebCryptoKey& PublicKey() const { return public_key_; }

  private:
   const WebCryptoKey public_key_;
 };

 class WebCryptoAesDerivedKeyParams : public WebCryptoAlgorithmParams {
  public:
   explicit WebCryptoAesDerivedKeyParams(uint16_t length_bits)
       : length_bits_(length_bits) {}

   WebCryptoAlgorithmParamsType GetType() const override {
     return kWebCryptoAlgorithmParamsTypeAesDerivedKeyParams;
   }

   uint16_t LengthBits() const { return length_bits_; }

  private:
   const uint16_t length_bits_;
 };

 class WebCryptoHkdfParams : public WebCryptoAlgorithmParamsWithHash {
  public:
   WebCryptoHkdfParams(const WebCryptoAlgorithm& hash,
                       WebVector<unsigned char> salt,
                       WebVector<unsigned char> info)
       : WebCryptoAlgorithmParamsWithHash(hash),
         salt_(std::move(salt)),
         info_(std::move(info)) {}

   const WebVector<unsigned char>& Salt() const { return salt_; }

   const WebVector<unsigned char>& Info() const { return info_; }

   WebCryptoAlgorithmParamsType GetType() const override {
     return kWebCryptoAlgorithmParamsTypeHkdfParams;
   }

  private:
   const WebVector<unsigned char> salt_;
   const WebVector<unsigned char> info_;
 };

 class WebCryptoPbkdf2Params : public WebCryptoAlgorithmParamsWithHash {
  public:
   WebCryptoPbkdf2Params(const WebCryptoAlgorithm& hash,
                         WebVector<unsigned char> salt,
                         unsigned iterations)
       : WebCryptoAlgorithmParamsWithHash(hash),
         salt_(std::move(salt)),
         iterations_(iterations) {}

   WebCryptoAlgorithmParamsType GetType() const override {
     return kWebCryptoAlgorithmParamsTypePbkdf2Params;
   }

   const WebVector<unsigned char>& Salt() const { return salt_; }
   unsigned Iterations() const { return iterations_; }

  private:
   const WebVector<unsigned char> salt_;
   const unsigned iterations_;
 };

 }  // namespace blink

 #endif
	/*
	* Copyright (C) 2013 Google Inc. All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions are
	* met:
	*
	* * Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* * Redistributions in binary form must reproduce the above
	* copyright notice, this list of conditions and the following disclaimer
	* in the documentation and/or other materials provided with the
	* distribution.
	* * Neither the name of Google Inc. nor the names of its
	* contributors may be used to endorse or promote products derived from
	* this software without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*/

	#ifndef THIRD_PARTY_BLINK_PUBLIC_PLATFORM_WEB_CRYPTO_ALGORITHM_PARAMS_H_
	#define THIRD_PARTY_BLINK_PUBLIC_PLATFORM_WEB_CRYPTO_ALGORITHM_PARAMS_H_

	#include "base/logging.h"
	#include "third_party/blink/public/platform/web_common.h"
	#include "third_party/blink/public/platform/web_crypto_algorithm.h"
	#include "third_party/blink/public/platform/web_crypto_key.h"
	#include "third_party/blink/public/platform/web_vector.h"

	namespace blink {

	// NOTE: For documentation on the meaning of each of the parameters see the
	// Web crypto spec:
	//
	// http://www.w3.org/TR/WebCryptoAPI
	//
	// For the most part, the parameters in the spec have the same name,
	// except that in the blink code:
	//
	// - Structure names are prefixed by "WebCrypto"
	// - Optional fields are prefixed by "optional"
	// - Data length properties are suffixed by either "Bits" or "Bytes"

	class WebCryptoAlgorithmParams {
	public:
	WebCryptoAlgorithmParams() = default;
	virtual ~WebCryptoAlgorithmParams() = default;
	virtual WebCryptoAlgorithmParamsType GetType() const = 0;
	};

	class WebCryptoAesCbcParams : public WebCryptoAlgorithmParams {
	public:
	explicit WebCryptoAesCbcParams(WebVector<unsigned char> iv)
	: iv_(std::move(iv)) {}

	WebCryptoAlgorithmParamsType GetType() const override {
	return kWebCryptoAlgorithmParamsTypeAesCbcParams;
	}

	const WebVector<unsigned char>& Iv() const { return iv_; }

	private:
	const WebVector<unsigned char> iv_;
	};

	class WebCryptoAlgorithmParamsWithHash : public WebCryptoAlgorithmParams {
	public:
	explicit WebCryptoAlgorithmParamsWithHash(const WebCryptoAlgorithm& hash)
	: hash_(hash) {
	DCHECK(!hash.IsNull());
	}

	const WebCryptoAlgorithm& GetHash() const { return hash_; }

	private:
	const WebCryptoAlgorithm hash_;
	};

	class WebCryptoAesCtrParams : public WebCryptoAlgorithmParams {
	public:
	WebCryptoAesCtrParams(unsigned char length_bits,
	WebVector<unsigned char> counter)
	: WebCryptoAlgorithmParams(),
	counter_(std::move(counter)),
	length_bits_(length_bits) {}

	WebCryptoAlgorithmParamsType GetType() const override {
	return kWebCryptoAlgorithmParamsTypeAesCtrParams;
	}

	const WebVector<unsigned char>& Counter() const { return counter_; }
	unsigned char LengthBits() const { return length_bits_; }

	private:
	const WebVector<unsigned char> counter_;
	const unsigned char length_bits_;
	};

	class WebCryptoAesKeyGenParams : public WebCryptoAlgorithmParams {
	public:
	explicit WebCryptoAesKeyGenParams(uint16_t length_bits)
	: length_bits_(length_bits) {}

	WebCryptoAlgorithmParamsType GetType() const override {
	return kWebCryptoAlgorithmParamsTypeAesKeyGenParams;
	}

	uint16_t LengthBits() const { return length_bits_; }

	private:
	const uint16_t length_bits_;
	};

	class WebCryptoHmacImportParams : public WebCryptoAlgorithmParamsWithHash {
	public:
	// FIXME: Remove this constructor once it is no longer used by Chromium.
	// http://crbug.com/431085
	explicit WebCryptoHmacImportParams(const WebCryptoAlgorithm& hash)
	: WebCryptoAlgorithmParamsWithHash(hash),
	has_length_bits_(false),
	optional_length_bits_(0) {}

	WebCryptoHmacImportParams(const WebCryptoAlgorithm& hash,
	bool has_length_bits,
	unsigned length_bits)
	: WebCryptoAlgorithmParamsWithHash(hash),
	has_length_bits_(has_length_bits),
	optional_length_bits_(length_bits) {
	DCHECK(has_length_bits \|\| !length_bits);
	}

	WebCryptoAlgorithmParamsType GetType() const override {
	return kWebCryptoAlgorithmParamsTypeHmacImportParams;
	}

	bool HasLengthBits() const { return has_length_bits_; }

	unsigned OptionalLengthBits() const { return optional_length_bits_; }

	private:
	const bool has_length_bits_;
	const unsigned optional_length_bits_;
	};

	class WebCryptoHmacKeyGenParams : public WebCryptoAlgorithmParamsWithHash {
	public:
	WebCryptoHmacKeyGenParams(const WebCryptoAlgorithm& hash,
	bool has_length_bits,
	unsigned length_bits)
	: WebCryptoAlgorithmParamsWithHash(hash),
	has_length_bits_(has_length_bits),
	optional_length_bits_(length_bits) {
	DCHECK(has_length_bits \|\| !length_bits);
	}

	WebCryptoAlgorithmParamsType GetType() const override {
	return kWebCryptoAlgorithmParamsTypeHmacKeyGenParams;
	}

	bool HasLengthBits() const { return has_length_bits_; }

	unsigned OptionalLengthBits() const { return optional_length_bits_; }

	private:
	const bool has_length_bits_;
	const unsigned optional_length_bits_;
	};

	class WebCryptoAesGcmParams : public WebCryptoAlgorithmParams {
	public:
	WebCryptoAesGcmParams(WebVector<unsigned char> iv,
	bool has_additional_data,
	WebVector<unsigned char> additional_data,
	bool has_tag_length_bits,
	unsigned char tag_length_bits)
	: iv_(std::move(iv)),
	has_additional_data_(has_additional_data),
	optional_additional_data_(std::move(additional_data)),
	has_tag_length_bits_(has_tag_length_bits),
	optional_tag_length_bits_(tag_length_bits) {
	DCHECK(has_additional_data \|\| optional_additional_data_.empty());
	DCHECK(has_tag_length_bits \|\| !tag_length_bits);
	}

	WebCryptoAlgorithmParamsType GetType() const override {
	return kWebCryptoAlgorithmParamsTypeAesGcmParams;
	}

	const WebVector<unsigned char>& Iv() const { return iv_; }

	bool HasAdditionalData() const { return has_additional_data_; }
	const WebVector<unsigned char>& OptionalAdditionalData() const {
	return optional_additional_data_;
	}

	bool HasTagLengthBits() const { return has_tag_length_bits_; }
	unsigned OptionalTagLengthBits() const { return optional_tag_length_bits_; }

	private:
	const WebVector<unsigned char> iv_;
	const bool has_additional_data_;
	const WebVector<unsigned char> optional_additional_data_;
	const bool has_tag_length_bits_;
	const unsigned char optional_tag_length_bits_;
	};

	class WebCryptoRsaHashedImportParams : public WebCryptoAlgorithmParamsWithHash {
	public:
	explicit WebCryptoRsaHashedImportParams(const WebCryptoAlgorithm& hash)
	: WebCryptoAlgorithmParamsWithHash(hash) {}

	WebCryptoAlgorithmParamsType GetType() const override {
	return kWebCryptoAlgorithmParamsTypeRsaHashedImportParams;
	}
	};

	class WebCryptoRsaHashedKeyGenParams : public WebCryptoAlgorithmParams {
	public:
	WebCryptoRsaHashedKeyGenParams(const WebCryptoAlgorithm& hash,
	unsigned modulus_length_bits,
	WebVector<unsigned char> public_exponent)
	: modulus_length_bits_(modulus_length_bits),
	public_exponent_(std::move(public_exponent)),
	hash_(hash) {
	DCHECK(!hash.IsNull());
	}

	WebCryptoAlgorithmParamsType GetType() const override {
	return kWebCryptoAlgorithmParamsTypeRsaHashedKeyGenParams;
	}

	unsigned ModulusLengthBits() const { return modulus_length_bits_; }
	const WebVector<unsigned char>& PublicExponent() const {
	return public_exponent_;
	}
	const WebCryptoAlgorithm& GetHash() const { return hash_; }

	// Converts the public exponent (big-endian WebCrypto BigInteger),
	// with or without leading zeros, to unsigned int. Returns true on success.
	bool ConvertPublicExponentToUnsigned(unsigned& result) const {
	result = 0;
	for (size_t i = 0; i < public_exponent_.size(); ++i) {
	size_t i_reversed = public_exponent_.size() - i - 1;

	if (i_reversed >= sizeof(result) && public_exponent_[i])
	return false; // Too large for unsigned int.

	result \|= public_exponent_[i] << 8 * i_reversed;
	}
	return true;
	}

	private:
	const unsigned modulus_length_bits_;
	const WebVector<unsigned char> public_exponent_;
	const WebCryptoAlgorithm hash_;
	};

	class WebCryptoRsaOaepParams : public WebCryptoAlgorithmParams {
	public:
	WebCryptoRsaOaepParams(bool has_label, WebVector<unsigned char> label)
	: has_label_(has_label), optional_label_(std::move(label)) {
	DCHECK(has_label \|\| optional_label_.empty());
	}

	WebCryptoAlgorithmParamsType GetType() const override {
	return kWebCryptoAlgorithmParamsTypeRsaOaepParams;
	}

	bool HasLabel() const { return has_label_; }
	const WebVector<unsigned char>& OptionalLabel() const {
	return optional_label_;
	}

	private:
	const bool has_label_;
	const WebVector<unsigned char> optional_label_;
	};

	class WebCryptoRsaPssParams : public WebCryptoAlgorithmParams {
	public:
	explicit WebCryptoRsaPssParams(unsigned salt_length_bytes)
	: salt_length_bytes_(salt_length_bytes) {}

	WebCryptoAlgorithmParamsType GetType() const override {
	return kWebCryptoAlgorithmParamsTypeRsaPssParams;
	}

	unsigned SaltLengthBytes() const { return salt_length_bytes_; }

	private:
	const unsigned salt_length_bytes_;
	};

	class WebCryptoEcdsaParams : public WebCryptoAlgorithmParamsWithHash {
	public:
	explicit WebCryptoEcdsaParams(const WebCryptoAlgorithm& hash)
	: WebCryptoAlgorithmParamsWithHash(hash) {}

	WebCryptoAlgorithmParamsType GetType() const override {
	return kWebCryptoAlgorithmParamsTypeEcdsaParams;
	}
	};

	class WebCryptoEcKeyGenParams : public WebCryptoAlgorithmParams {
	public:
	explicit WebCryptoEcKeyGenParams(WebCryptoNamedCurve named_curve)
	: named_curve_(named_curve) {}

	WebCryptoAlgorithmParamsType GetType() const override {
	return kWebCryptoAlgorithmParamsTypeEcKeyGenParams;
	}

	WebCryptoNamedCurve NamedCurve() const { return named_curve_; }

	private:
	const WebCryptoNamedCurve named_curve_;
	};

	class WebCryptoEcKeyImportParams : public WebCryptoAlgorithmParams {
	public:
	explicit WebCryptoEcKeyImportParams(WebCryptoNamedCurve named_curve)
	: named_curve_(named_curve) {}

	WebCryptoAlgorithmParamsType GetType() const override {
	return kWebCryptoAlgorithmParamsTypeEcKeyImportParams;
	}

	WebCryptoNamedCurve NamedCurve() const { return named_curve_; }

	private:
	const WebCryptoNamedCurve named_curve_;
	};

	class WebCryptoEcdhKeyDeriveParams : public WebCryptoAlgorithmParams {
	public:
	explicit WebCryptoEcdhKeyDeriveParams(const WebCryptoKey& public_key)
	: public_key_(public_key) {}

	WebCryptoAlgorithmParamsType GetType() const override {
	return kWebCryptoAlgorithmParamsTypeEcdhKeyDeriveParams;
	}

	const WebCryptoKey& PublicKey() const { return public_key_; }

	private:
	const WebCryptoKey public_key_;
	};

	class WebCryptoAesDerivedKeyParams : public WebCryptoAlgorithmParams {
	public:
	explicit WebCryptoAesDerivedKeyParams(uint16_t length_bits)
	: length_bits_(length_bits) {}

	WebCryptoAlgorithmParamsType GetType() const override {
	return kWebCryptoAlgorithmParamsTypeAesDerivedKeyParams;
	}

	uint16_t LengthBits() const { return length_bits_; }

	private:
	const uint16_t length_bits_;
	};

	class WebCryptoHkdfParams : public WebCryptoAlgorithmParamsWithHash {
	public:
	WebCryptoHkdfParams(const WebCryptoAlgorithm& hash,
	WebVector<unsigned char> salt,
	WebVector<unsigned char> info)
	: WebCryptoAlgorithmParamsWithHash(hash),
	salt_(std::move(salt)),
	info_(std::move(info)) {}

	const WebVector<unsigned char>& Salt() const { return salt_; }

	const WebVector<unsigned char>& Info() const { return info_; }

	WebCryptoAlgorithmParamsType GetType() const override {
	return kWebCryptoAlgorithmParamsTypeHkdfParams;
	}

	private:
	const WebVector<unsigned char> salt_;
	const WebVector<unsigned char> info_;
	};

	class WebCryptoPbkdf2Params : public WebCryptoAlgorithmParamsWithHash {
	public:
	WebCryptoPbkdf2Params(const WebCryptoAlgorithm& hash,
	WebVector<unsigned char> salt,
	unsigned iterations)
	: WebCryptoAlgorithmParamsWithHash(hash),
	salt_(std::move(salt)),
	iterations_(iterations) {}

	WebCryptoAlgorithmParamsType GetType() const override {
	return kWebCryptoAlgorithmParamsTypePbkdf2Params;
	}

	const WebVector<unsigned char>& Salt() const { return salt_; }
	unsigned Iterations() const { return iterations_; }

	private:
	const WebVector<unsigned char> salt_;
	const unsigned iterations_;
	};

	} // namespace blink

	#endif