/// <summary>デジタル署名を作成する</summary>
/// <param name="data">デジタル署名を行なう対象データ</param>
/// <returns>対象データに対してデジタル署名したデジタル署名部分のデータ</returns>
public override byte[] Sign(byte[] data)
{
// ハッシュ
byte[] hashedByte = this.HashAlgorithm.ComputeHash(data);
// デジタル署名
byte[] signedByte = null;
if (this.AsymmetricAlgorithm is RSACryptoServiceProvider)
{
// RSAPKCS1SignatureFormatterオブジェクトを作成
RSAPKCS1SignatureFormatter rsaFormatter = new RSAPKCS1SignatureFormatter(this.AsymmetricAlgorithm);
rsaFormatter.SetHashAlgorithm(
RsaAndDsaCmnFunc.GetHashAlgorithmName(this.HashAlgorithm));
signedByte = rsaFormatter.CreateSignature(hashedByte);
}
else if (this.AsymmetricAlgorithm is DSACryptoServiceProvider)
{
// DSASignatureFormatterオブジェクトを作成
DSASignatureFormatter dsaFormatter = new DSASignatureFormatter(this.AsymmetricAlgorithm);
// デジタル署名を作成
dsaFormatter.SetHashAlgorithm("SHA1");
signedByte = dsaFormatter.CreateSignature(hashedByte);
}
return(signedByte);
}
/// <summary>Constructor</summary>
/// <param name="eaa">EnumDigitalSignAlgorithm</param>
public DigitalSignParam(EnumDigitalSignAlgorithm eaa)
{
AsymmetricAlgorithm aa = null;
HashAlgorithm ha = null;
RsaAndDsaCmnFunc.CreateDigitalSignServiceProvider(eaa, out aa, out ha);
this.AsymmetricAlgorithm = aa;
this.HashAlgorithm = ha;
}
/// <summary>デジタル署名を検証する</summary>
/// <param name="data">デジタル署名を行なった対象データ</param>
/// <param name="sign">対象データに対してデジタル署名したデジタル署名部分のデータ</param>
/// <returns>検証結果( true:検証成功, false:検証失敗 )</returns>
public override bool Verify(byte[] data, byte[] sign)
{
if (this.AsymmetricAlgorithm is RSACryptoServiceProvider)
{
return(((RSACryptoServiceProvider)this.AsymmetricAlgorithm).
VerifyData(data, RsaAndDsaCmnFunc.GetHashAlgorithmName(this.HashAlgorithm), sign));
}
else
{
return(((DSACryptoServiceProvider)this.AsymmetricAlgorithm).
VerifyData(data, sign));
}
}
/// <summary>Constructor</summary>
/// <param name="eaa">EnumDigitalSignAlgorithm</param>
public DigitalSignXML(EnumDigitalSignAlgorithm eaa)
{
AsymmetricAlgorithm aa = null;
HashAlgorithm ha = null;
RsaAndDsaCmnFunc.CreateDigitalSignServiceProvider(eaa, out aa, out ha);
this.AsymmetricAlgorithm = aa;
this.HashAlgorithm = ha;
// 秘密鍵をXML形式で取得
this.XMLPrivateKey = this.AsymmetricAlgorithm.ToXmlString(true);
// 公開鍵をXML形式で取得
this.XMLPublicKey = this.AsymmetricAlgorithm.ToXmlString(false);
}
/// <summary>デジタル署名を検証する</summary>
/// <param name="data">デジタル署名を行なった対象データ</param>
/// <param name="sign">対象データに対してデジタル署名したデジタル署名部分のデータ</param>
/// <returns>検証結果( true:検証成功, false:検証失敗 )</returns>
public override bool Verify(byte[] data, byte[] sign)
{
//// XMLPublicKeyプロパティ・プロシージャ（set）に移動
//this.AsymmetricAlgorithm.FromXmlString(this.XMLPublicKey);
if (this.AsymmetricAlgorithm is RSACryptoServiceProvider)
{
return(((RSACryptoServiceProvider)this.AsymmetricAlgorithm).VerifyData(
data, RsaAndDsaCmnFunc.GetHashAlgorithmName(this.HashAlgorithm), sign));
}
else
{
return(((DSACryptoServiceProvider)this.AsymmetricAlgorithm).VerifyData(data, sign));
}
}
/// <summary>公開鍵・暗号化サービスプロバイダの生成(param)</summary>
/// <param name="param">
/// - RSAParameters
/// - DSAParameters
/// </param>
/// <param name="ha">HashAlgorithm(使用可能かチェック)</param>
/// <returns>
/// AsymmetricAlgorithm
/// - RSACryptoServiceProvider
/// - DSACryptoServiceProvider
/// </returns>
public static AsymmetricAlgorithm CreateAsymmetricAlgorithmFromParam(object param, HashAlgorithm ha)
{
if (param is RSAParameters)
{
// RSACryptoServiceProvider
RSACryptoServiceProvider rsaCryptoServiceProvider = new RSACryptoServiceProvider();
rsaCryptoServiceProvider.ImportParameters((RSAParameters)param);
// HashAlgorithm
string temp = RsaAndDsaCmnFunc.GetHashAlgorithmName(ha);
if ("MD5, SHA1, SHA256, SHA384, SHA512".IndexOf(temp) != -1)
{
return(rsaCryptoServiceProvider);
}
else
{
throw new ArgumentException(
PublicExceptionMessage.ARGUMENT_INCORRECT,
"The hash algorithm parameter of rsa is incorrect.");
}
}
else if (param is DSAParameters)
{
// DSACryptoServiceProvider
DSACryptoServiceProvider dsaCryptoServiceProvider = new DSACryptoServiceProvider();
dsaCryptoServiceProvider.ImportParameters((DSAParameters)param);
// HashAlgorithm
string temp = RsaAndDsaCmnFunc.GetHashAlgorithmName(ha);
if (temp == "SHA1")
{
return(dsaCryptoServiceProvider);
}
else
{
throw new ArgumentException(
PublicExceptionMessage.ARGUMENT_INCORRECT,
"The hash algorithm parameter of dsa is incorrect.");
}
}
else
{
throw new ArgumentException(
PublicExceptionMessage.ARGUMENT_INCORRECT,
"The algorithm parameters is incorrect.");
}
}
/// <summary>Constructor</summary>
/// <param name="eaa">EnumDigitalSignAlgorithm</param>
/// <param name="xmlKey">string</param>
public DigitalSignXML(EnumDigitalSignAlgorithm eaa, string xmlKey)
{
AsymmetricAlgorithm aa = null;
HashAlgorithm ha = null;
RsaAndDsaCmnFunc.CreateDigitalSignServiceProvider(eaa, out aa, out ha);
if (aa is RSACryptoServiceProvider)
{
RSACryptoServiceProvider rsaCryptoServiceProvider = (RSACryptoServiceProvider)aa;
rsaCryptoServiceProvider.FromXmlString(xmlKey);
this.AsymmetricAlgorithm = rsaCryptoServiceProvider;
}
else if (aa is DSACryptoServiceProvider)
{
DSACryptoServiceProvider dsaCryptoServiceProvider = (DSACryptoServiceProvider)aa;
dsaCryptoServiceProvider.FromXmlString(xmlKey);
this.AsymmetricAlgorithm = dsaCryptoServiceProvider;
}
this.HashAlgorithm = ha;
// 秘密鍵をXML形式で取得
try
{
this.XMLPrivateKey = this.AsymmetricAlgorithm.ToXmlString(true);
}
catch (CryptographicException cex)
{
cex.GetType();
// 潰す（xmlKeyが公開鍵のケース）
}
// 公開鍵をXML形式で取得
this.XMLPublicKey = this.AsymmetricAlgorithm.ToXmlString(false);
}
/// <summary>Constructor</summary>
/// <param name="param">object</param>
/// <param name="ha">HashAlgorithm</param>
public DigitalSignParam(object param, HashAlgorithm ha)
{
this.AsymmetricAlgorithm = RsaAndDsaCmnFunc.CreateAsymmetricAlgorithmFromParam(param, ha);
this.HashAlgorithm = ha;
}