Android API cannot get X509Certificate

I have been trying to get subject alternative names from an X509Certificate, but it seems cert.getSubjectAlternativeNames() does not work in Android, which returns null. However, when I use cert.getExtensionValue("2.5.29.17") to e开发者_JAVA百科xtract subject alternative names, the names DO exist and I can parse it byte by byte.

Btw, I am sure my PKCS12 certificate is valid, because I can use getSubjectAlternativeNames() and get the correct result in Java program.

Does any body know how to use getSubjectAlternativeNames() in Android correctly or I miss some configuration in Android?

Thanks Aoting

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Try using org.bouncycastle.x509.extension.X509ExtensionUtil.getSubjectAlternativeNames(X509Certificate cert) as a workaround. If the extension is there, and assuming the bug is not in X509ExtensionUtil itself, but in X509Certificate, it should work.

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It seems that certificate does not contain SubjectAltName extension. Also on which version of Android you are trying this ? There is already an issue reported to Google around this, which see to have been resolved in Froyo.