I've also tried iText 2.1.2u with Bouncy Castle libraries 1.36 and receive
the same error.
In the end, I could use the iText version 1.5.4 for my needs without having
to use the external Bouncy Catle libraries because all I need to do is
extract the information from the digital signature. Using 1.5.4 the
following line:
System.out.println("Subject: " +
PdfPKCS7.getSubjectFields(pk.getSigningCertificate()));
works to print out:
Subject: {O=[], OU=[BAH], CN=[Brad Smith], C=[US], E=[BAH]}
But I can't figure out how to extract the individual items from the
certificate in version 1.5.4
Could you help me with this?
It is a simple Adobe self signed digital signature created in Adobe 7.0
Paulo Soares wrote:
>
> BouncyCastle 1.39 only works with iText 2.1.3 and later.
>
> Paulo
>
>> -----Original Message-----
>> From: [EMAIL PROTECTED]
>> [mailto:[EMAIL PROTECTED] On
>> Behalf Of 021336
>> Sent: Thursday, July 10, 2008 9:20 PM
>> To: [email protected]
>> Subject: [iText-questions] Error when verifying signature
>>
>>
>> Using the standard code below:
>>
>> PdfReader mReader = new PdfReader(aUnsignedFileName);
>> AcroFields mForm = mReader.getAcroFields();
>> ArrayList mSignatures = mForm.getSignatureNames();
>> String mName;
>> for (Iterator i = mSignatures.iterator(); i.hasNext();)
>> {
>> mName = (String)i.next();
>> System.out.println(mName);
>> PdfPKCS7 pk = mForm.verifySignature(mName);
>>
>> I am getting a Bouncy Castle error when executing "verifySignature"
>>
>> java.lang.NoSuchMethodError: void
>> org.bouncycastle.asn1.ASN1InputStream.<init>(java.io.InputStream, int)
>>
>> at
>> org.bouncycastle.jce.provider.X509CertParser.readDERCertificat
>> e(Unknown
>> Source)
>>
>> at
>> org.bouncycastle.jce.provider.X509CertParser.engineRead(Unknow
>> n Source)
>>
>> at
>> org.bouncycastle.jce.provider.X509CertParser.engineReadAll(Unknown
>> Source)
>>
>> at com.lowagie.text.pdf.PdfPKCS7.<init>(Unknown Source)
>>
>> at
>> com.lowagie.text.pdf.AcroFields.verifySignature(Unknown Source)
>>
>> Anyone have any suggestions?
>>
>> I am using Java 1.4, iText 2.1.2, and BouncyCastle libraries 1.39
>>
>> I appreciate any assistance.
>
>
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