У меня есть несколько XML-документов с цифровой подписью, которые я получаю от кого-то другого. Я хочу знать , когда они были подписаны . Есть ли способ сделать это в C#? Если это невозможно в C#, как это сделать? Ниже приведена часть, в которой я определил подпись.
<ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#"><ds:SignedInfo><ds:CanonicalizationMethod Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315#WithComments"/><ds:SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha256"/><ds:Reference URI="#ID_1"><ds:Transforms><ds:Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature"/></ds:Transforms><ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/><ds:DigestValue>5Ps8e+4Obgw0iBgVGeekUaM0D0qkAc6L1wUtYo6h2xM=</ds:DigestValue></ds:Reference></ds:SignedInfo><ds:SignatureValue>ITAt3eN+iRmiX9AifjEVCqgt2GQUMz6VlcfdPNTuz6Z01mbNpDH5LSIRlieLXmj6H75jWPVwXZHz
azEkQ9MQdeLknRmxRmtQgruf8EPF9PtfflyBBCvpg6cUEZ3qdTg366HrXiyZAIu20Z0CBd+S2l5H
YN0Px1qLNYHx9Xs/nVA=</ds:SignatureValue><ds:KeyInfo><ds:KeyValue><ds:RSAKeyValue><ds:Modulus>03RS2Pm81cvHe4rSmD42+XdXA+k8QZsgbQcMx6A+mtWhKPrG0WaeScwjJHDwmWDjovy3u7bvUAIe
wjoi78OQArMCQDNOKOcm4rXZDsjKQ3JLCZxGfHhiktazMVWxskvGIemAk3MNyH/ObjnZqxJqnRxc
zceDL4TFimkP6Gr3eR8=</ds:Modulus><ds:Exponent>AQAB</ds:Exponent></ds:RSAKeyValue></ds:KeyValue><ds:X509Data><ds:X509SubjectName>UID=xxxxxxxxxxxx,CN=xxxxxxxxxxx,C=xx</ds:X509SubjectName><ds:X509Certificate>MIIEdTCCA12gAwIBAgIQVAm82EQIjzMOB0FYGDoBNzANBgkqhkiG9w0BAQsFADBaMQswCQYDVQQG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</ds:X509Certificate></ds:X509Data></ds:KeyInfo></ds:Signature>