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    <p>Finally i got it with help of this: <a href="https://stackoverflow.com/questions/8243566/verifying-detached-signature-with-bc">verifying detached signature with BC</a></p> <pre><code> String toVerify = "A1005056807CE11EE2B4CE0025305725CFrCN%3DKED,OU%3DI0020266601,OU%3DSAPWebAS,O%3DSAPTrustCommunity,C%3DDE20130611102236"; String signed = "MIIBUQYJKoZIhvcNAQcCoIIBQjCCAT4CAQExCzAJBgUrDgMCGgUAMAsGCSqGSIb3DQEHATGCAR0wggEZAgEBMG8wZDELMAkGA1UEBhMCREUxHDAaBgNVBAoTE1NBUCBUcnVzdCBDb21tdW5pdHkxEzARBgNVBAsTClNBUCBXZWIgQVMxFDASBgNVBAsTC0kwMDIwMjY2NjAxMQwwCgYDVQQDEwNLRUQCByASEgITMlYwCQYFKw4DAhoFAKBdMBgGCSqGSIb3DQEJAzELBgkqhkiG9w0BBwEwHAYJKoZIhvcNAQkFMQ8XDTEzMDYxMTA4MjM1MVowIwYJKoZIhvcNAQkEMRYEFGy7jXb/pUqMYdk2dss2Qe6hNroaMAkGByqGSM44BAMELjAsAhRMJ+t5/3RxQAsHKnIoPY4BnO0qCAIUAbKRwWNjOYsewB56zoZqnZwRyWw="; byte[] signedByte = Base64.decode(signed); Security.addProvider(new BouncyCastleProvider()); CMSSignedData s = new CMSSignedData(new CMSProcessableByteArray(toVerify.getBytes()), signedByte); SignerInformationStore signers = s.getSignerInfos(); SignerInformation signerInfo = (SignerInformation)signers.getSigners().iterator().next(); FileInputStream fis = new FileInputStream("c:\\sap.cer"); CertificateFactory cf = CertificateFactory.getInstance("X.509"); X509Certificate cert = (X509Certificate)cf.generateCertificates(fis).iterator().next(); boolean result = signerInfo.verify(new JcaSimpleSignerInfoVerifierBuilder().setProvider("SUN").build(cert.getPublicKey())); System.out.println("Verified: "+result); </code></pre>
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