You'll have to use an external signature. The internal signing mode only
supports RSA and DSA. I want to move all the signing logic to
bouncycastle and avoid this and other problems but there's always
something more urgent to attend to.
Paulo
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On
> Behalf Of Maximilian Schmidt
> Sent: Thursday, July 17, 2008 12:55 PM
> To: [email protected]
> Subject: [iText-questions] signing/embedding PKCS7 using a key with EC
>
> Dear all,
>
> I'm trying to sign a bunch of PDF documents using a PKCS12 keystore.
> Using the great HowToSign tutorial I already managed to do this in no
> time. However, once I try to do the same with a PKSC12
> containing keys
> that use elliptic curves (EC), I get the following error:
> ExceptionConverter: java.security.NoSuchAlgorithmException:
> Unknown Key
> Algorithm EC
> at com.lowagie.text.pdf.PdfPKCS7.<init>(PdfPKCS7.java:401)
> at
> com.lowagie.text.pdf.PdfSigGenericPKCS.setSignInfo(PdfSigGener
> icPKCS.java:97)
> at
> com.lowagie.text.pdf.PdfSignatureAppearance.preClose(PdfSignat
> ureAppearance.java:787)
> at
> com.lowagie.text.pdf.PdfSignatureAppearance.preClose(PdfSignat
> ureAppearance.java:717)
> at com.lowagie.text.pdf.PdfStamper.close(PdfStamper.java:200)
> at
> org.emayor.softsigner.SoftSignerOld.sign(SoftSignerOld.java:174)
> at
> org.emayor.softsigner.SoftSignerOld.main(SoftSignerOld.java:60)
> Could not inject signature: Unknown Key Algorithm EC
>
> I've managed to produce a P7M with the same key using only
> BouncyCastle,
> so I assume at some point iText uses its own logic for these things.
> I've also tried to force the provider used by doing
>
> PdfSignatureAppearance sap = stp.getSignatureAppearance();
> sap.setProvider( BouncyCastleProvider.PROVIDER_NAME );
>
> but that doesn't solve this issue. Any comments on how I
> could get this
> working?
>
> Thanks in advance,
> Max
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