// We can provide a default implementation of FromXmlString because we require
// every DSA implementation to implement ImportParameters
// All we have to do here is parse the XML.
public override void FromXmlString(String xmlString)
{
if (xmlString == null)
{
throw new ArgumentNullException("xmlString");
}
Contract.EndContractBlock();
DSAParameters dsaParams = new DSAParameters();
Parser p = new Parser(xmlString);
SecurityElement topElement = p.GetTopElement();
// P is always present
String pString = topElement.SearchForTextOfLocalName("P");
if (pString == null)
{
throw new CryptographicException(Environment.GetResourceString("Cryptography_InvalidFromXmlString", "DSA", "P"));
}
dsaParams.P = Convert.FromBase64String(Utils.DiscardWhiteSpaces(pString));
// Q is always present
String qString = topElement.SearchForTextOfLocalName("Q");
if (qString == null)
{
throw new CryptographicException(Environment.GetResourceString("Cryptography_InvalidFromXmlString", "DSA", "Q"));
}
dsaParams.Q = Convert.FromBase64String(Utils.DiscardWhiteSpaces(qString));
// G is always present
String gString = topElement.SearchForTextOfLocalName("G");
if (gString == null)
{
throw new CryptographicException(Environment.GetResourceString("Cryptography_InvalidFromXmlString", "DSA", "G"));
}
dsaParams.G = Convert.FromBase64String(Utils.DiscardWhiteSpaces(gString));
// Y is always present
String yString = topElement.SearchForTextOfLocalName("Y");
if (yString == null)
{
throw new CryptographicException(Environment.GetResourceString("Cryptography_InvalidFromXmlString", "DSA", "Y"));
}
dsaParams.Y = Convert.FromBase64String(Utils.DiscardWhiteSpaces(yString));
// J is optional
String jString = topElement.SearchForTextOfLocalName("J");
if (jString != null)
{
dsaParams.J = Convert.FromBase64String(Utils.DiscardWhiteSpaces(jString));
}
// X is optional -- private key if present
String xString = topElement.SearchForTextOfLocalName("X");
if (xString != null)
{
dsaParams.X = Convert.FromBase64String(Utils.DiscardWhiteSpaces(xString));
}
// Seed and PgenCounter are optional as a unit -- both present or both absent
String seedString = topElement.SearchForTextOfLocalName("Seed");
String pgenCounterString = topElement.SearchForTextOfLocalName("PgenCounter");
if ((seedString != null) && (pgenCounterString != null))
{
dsaParams.Seed = Convert.FromBase64String(Utils.DiscardWhiteSpaces(seedString));
dsaParams.Counter = Utils.ConvertByteArrayToInt(Convert.FromBase64String(Utils.DiscardWhiteSpaces(pgenCounterString)));
}
else if ((seedString != null) || (pgenCounterString != null))
{
if (seedString == null)
{
throw new CryptographicException(Environment.GetResourceString("Cryptography_InvalidFromXmlString", "DSA", "Seed"));
}
else
{
throw new CryptographicException(Environment.GetResourceString("Cryptography_InvalidFromXmlString", "DSA", "PgenCounter"));
}
}
ImportParameters(dsaParams);
}
/// <summary>Reconstructs a <see cref="T:System.Security.Cryptography.DSA" /> object from an XML string.</summary>
/// <param name="xmlString">The XML string to use to reconstruct the <see cref="T:System.Security.Cryptography.DSA" /> object. </param>
/// <exception cref="T:System.ArgumentNullException">The <paramref name="xmlString" /> parameter is <see langword="null" />. </exception>
/// <exception cref="T:System.Security.Cryptography.CryptographicException">The format of the <paramref name="xmlString" /> parameter is not valid. </exception>
// Token: 0x06002178 RID: 8568 RVA: 0x0007658C File Offset: 0x0007478C
public override void FromXmlString(string xmlString)
{
if (xmlString == null)
{
throw new ArgumentNullException("xmlString");
}
DSAParameters parameters = default(DSAParameters);
Parser parser = new Parser(xmlString);
SecurityElement topElement = parser.GetTopElement();
string text = topElement.SearchForTextOfLocalName("P");
if (text == null)
{
throw new CryptographicException(Environment.GetResourceString("Cryptography_InvalidFromXmlString", new object[]
{
"DSA",
"P"
}));
}
parameters.P = Convert.FromBase64String(Utils.DiscardWhiteSpaces(text));
string text2 = topElement.SearchForTextOfLocalName("Q");
if (text2 == null)
{
throw new CryptographicException(Environment.GetResourceString("Cryptography_InvalidFromXmlString", new object[]
{
"DSA",
"Q"
}));
}
parameters.Q = Convert.FromBase64String(Utils.DiscardWhiteSpaces(text2));
string text3 = topElement.SearchForTextOfLocalName("G");
if (text3 == null)
{
throw new CryptographicException(Environment.GetResourceString("Cryptography_InvalidFromXmlString", new object[]
{
"DSA",
"G"
}));
}
parameters.G = Convert.FromBase64String(Utils.DiscardWhiteSpaces(text3));
string text4 = topElement.SearchForTextOfLocalName("Y");
if (text4 == null)
{
throw new CryptographicException(Environment.GetResourceString("Cryptography_InvalidFromXmlString", new object[]
{
"DSA",
"Y"
}));
}
parameters.Y = Convert.FromBase64String(Utils.DiscardWhiteSpaces(text4));
string text5 = topElement.SearchForTextOfLocalName("J");
if (text5 != null)
{
parameters.J = Convert.FromBase64String(Utils.DiscardWhiteSpaces(text5));
}
string text6 = topElement.SearchForTextOfLocalName("X");
if (text6 != null)
{
parameters.X = Convert.FromBase64String(Utils.DiscardWhiteSpaces(text6));
}
string text7 = topElement.SearchForTextOfLocalName("Seed");
string text8 = topElement.SearchForTextOfLocalName("PgenCounter");
if (text7 != null && text8 != null)
{
parameters.Seed = Convert.FromBase64String(Utils.DiscardWhiteSpaces(text7));
parameters.Counter = Utils.ConvertByteArrayToInt(Convert.FromBase64String(Utils.DiscardWhiteSpaces(text8)));
}
else if (text7 != null || text8 != null)
{
if (text7 == null)
{
throw new CryptographicException(Environment.GetResourceString("Cryptography_InvalidFromXmlString", new object[]
{
"DSA",
"Seed"
}));
}
throw new CryptographicException(Environment.GetResourceString("Cryptography_InvalidFromXmlString", new object[]
{
"DSA",
"PgenCounter"
}));
}
this.ImportParameters(parameters);
}
/// <summary>通过 XML 字符串重新构造 <see cref="T:System.Security.Cryptography.DSA" /> 对象。</summary>
/// <param name="xmlString">用于重新构造 <see cref="T:System.Security.Cryptography.DSA" /> 对象的 XML 字符串。</param>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="xmlString" /> 参数为 null。</exception>
/// <exception cref="T:System.Security.Cryptography.CryptographicException">
/// <paramref name="xmlString" /> 参数的格式无效。</exception>
public override void FromXmlString(string xmlString)
{
if (xmlString == null)
{
throw new ArgumentNullException("xmlString");
}
DSAParameters parameters = new DSAParameters();
SecurityElement topElement = new Parser(xmlString).GetTopElement();
string inputBuffer1 = topElement.SearchForTextOfLocalName("P");
if (inputBuffer1 == null)
{
throw new CryptographicException(Environment.GetResourceString("Cryptography_InvalidFromXmlString", (object)"DSA", (object)"P"));
}
parameters.P = Convert.FromBase64String(Utils.DiscardWhiteSpaces(inputBuffer1));
string inputBuffer2 = topElement.SearchForTextOfLocalName("Q");
if (inputBuffer2 == null)
{
throw new CryptographicException(Environment.GetResourceString("Cryptography_InvalidFromXmlString", (object)"DSA", (object)"Q"));
}
parameters.Q = Convert.FromBase64String(Utils.DiscardWhiteSpaces(inputBuffer2));
string inputBuffer3 = topElement.SearchForTextOfLocalName("G");
if (inputBuffer3 == null)
{
throw new CryptographicException(Environment.GetResourceString("Cryptography_InvalidFromXmlString", (object)"DSA", (object)"G"));
}
parameters.G = Convert.FromBase64String(Utils.DiscardWhiteSpaces(inputBuffer3));
string inputBuffer4 = topElement.SearchForTextOfLocalName("Y");
if (inputBuffer4 == null)
{
throw new CryptographicException(Environment.GetResourceString("Cryptography_InvalidFromXmlString", (object)"DSA", (object)"Y"));
}
parameters.Y = Convert.FromBase64String(Utils.DiscardWhiteSpaces(inputBuffer4));
string inputBuffer5 = topElement.SearchForTextOfLocalName("J");
if (inputBuffer5 != null)
{
parameters.J = Convert.FromBase64String(Utils.DiscardWhiteSpaces(inputBuffer5));
}
string inputBuffer6 = topElement.SearchForTextOfLocalName("X");
if (inputBuffer6 != null)
{
parameters.X = Convert.FromBase64String(Utils.DiscardWhiteSpaces(inputBuffer6));
}
string inputBuffer7 = topElement.SearchForTextOfLocalName("Seed");
string inputBuffer8 = topElement.SearchForTextOfLocalName("PgenCounter");
if (inputBuffer7 != null && inputBuffer8 != null)
{
parameters.Seed = Convert.FromBase64String(Utils.DiscardWhiteSpaces(inputBuffer7));
parameters.Counter = Utils.ConvertByteArrayToInt(Convert.FromBase64String(Utils.DiscardWhiteSpaces(inputBuffer8)));
}
else if (inputBuffer7 != null || inputBuffer8 != null)
{
if (inputBuffer7 == null)
{
throw new CryptographicException(Environment.GetResourceString("Cryptography_InvalidFromXmlString", (object)"DSA", (object)"Seed"));
}
throw new CryptographicException(Environment.GetResourceString("Cryptography_InvalidFromXmlString", (object)"DSA", (object)"PgenCounter"));
}
this.ImportParameters(parameters);
}