Invalidating your own signature Online milf random chat


02-Jul-2015 22:02

invalidating your own signature-21

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This is our code, first, we get the signature appearance, and calculate the hash: Pdf Reader reader = new Pdf Reader(Base64.decode(pdf B64)); Appendable(true); baos = new Byte Array Output Stream(); Pdf Stamper stamper = Pdf Stamper.create Signature(reader, baos, '

This is our code, first, we get the signature appearance, and calculate the hash: Pdf Reader reader = new Pdf Reader(Base64.decode(pdf B64)); Appendable(true); baos = new Byte Array Output Stream(); Pdf Stamper stamper = Pdf Stamper.create Signature(reader, baos, '

I think that we make something wrong in the process, and we don't know exactly what could be. Representant[0]"); Certificate(chain[0]); Pdf Signature dic = new Pdf Signature(Pdf Name. ADBE_PKCS7_DETACHED); Reason(Reason()); Location(Location()); Contact(Contact()); Date(new Pdf Date(Sign Date())); Crypto Dictionary(dic); Hash Map(); exc.put(Pdf Name.

We appreciate help on this, or an alternative way to do that. Pdf Reader reader = new Pdf Reader(Base64.decode(pdf B64)); Appendable(true); baos = new Byte Array Output Stream(); Pdf Stamper stamper = Pdf Stamper.create Signature(reader, baos, '[[

This is our code, first, we get the signature appearance, and calculate the hash: Pdf Reader reader = new Pdf Reader(Base64.decode(pdf B64)); Appendable(true); baos = new Byte Array Output Stream(); Pdf Stamper stamper = Pdf Stamper.create Signature(reader, baos, '\0', null, true); appearance = Signature Appearance(); Crypto(null, chain, null, Pdf Signature Appearance. CONTENTS, new Pdf String(padded Sig)Hex Writing(true)); appearance.close(dic); byte[] pdf = Byte Array(); In this point, we get a PDF signed, but with an invalid signature.SELF_SIGNED); Visible Signature("Representant"); cal = Instance(); Pdf Dictionary dic = new Pdf Dictionary(); dic.put(Pdf Name. Adobe says that "Document has been altered or corrupted since it was signed".CONTENTS, new Pdf String(padded Sig)Hex Writing(true)); appearance.close(dic2); byte[] pdf = Byte Array(); The first option, is not viable, because the PDF is signed without a timestamp (this is a very important requisite), - Have you considered applying a PAd ES part 4 style document timestamp?If that is no option, have you checked whether the integrated PDF signature returned by your service has still some reserved signature space left?This webservice, offers two options, send the PDF document, and it returns a signed pdf, or send a hash that will be signed. SUBFILTER, new Pdf Name("adbe.pkcs7.detached")); dic.put(Pdf Name. M, new Pdf Date(cal)); Crypto Dictionary(dic); Hash Map(); exc.put(Pdf Name.The first option, is not viable, because the PDF is signed without a timestamp (this is a very important requisite), so the second option is chosen. CONTENTS, Integer.value Of(reserved Value() * 2 + 2)); Certification Level(1); Close(exc); Abstract Checksum checksum = Jacksum Checksum Instance("sha1"); checksum.reset(); checksum.update(Utils.stream To Byte Array(Range Stream())); hash = Byte Array(); byte[] padded Sig = new byte[reserved Value()]; System.arraycopy(signed Hash, 0, padded Sig, 0, signed Hash.length); Pdf Dictionary dic = new Pdf Dictionary(); dic.put(Pdf Name. I have an application that generates a PDF, and that needs to be signed.

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This is our code, first, we get the signature appearance, and calculate the hash: Pdf Reader reader = new Pdf Reader(Base64.decode(pdf B64)); Appendable(true); baos = new Byte Array Output Stream(); Pdf Stamper stamper = Pdf Stamper.create Signature(reader, baos, '\0', null, true); appearance = Signature Appearance(); Crypto(null, chain, null, Pdf Signature Appearance. CONTENTS, new Pdf String(padded Sig)Hex Writing(true)); appearance.close(dic); byte[] pdf = Byte Array(); In this point, we get a PDF signed, but with an invalid signature.

]]'); appearance = Signature Appearance(); Reason("Test"); Location("A casa de la caputeta"); Visible Signature("TMAQ-TSR[0]. CONTENTS, new Integer(reserved Value() * 2 + 2)); Close(exc); External Digest external Digest = new External Digest() { public Message Digest get Message Digest(String hash Algorithm) throws General Security Exception { return Digest Message Digest(hash Algorithm, null); } }; sgn = new Pdf PKCS7(null, chain, "SHA256", null, external Digest, false); Input Stream data = Range Stream(); hash = Digest Algorithms.digest(data, external Message Digest("SHA256")); cal = Instance(); byte[] sh = Authenticated Attribute Bytes(hash, cal, null, null, Crypto Standard.

', null, true); appearance = Signature Appearance(); Crypto(null, chain, null, Pdf Signature Appearance. CONTENTS, new Pdf String(padded Sig)Hex Writing(true)); appearance.close(dic); byte[] pdf = Byte Array(); In this point, we get a PDF signed, but with an invalid signature.SELF_SIGNED); Visible Signature("Representant"); cal = Instance(); Pdf Dictionary dic = new Pdf Dictionary(); dic.put(Pdf Name. Adobe says that "Document has been altered or corrupted since it was signed".CONTENTS, new Pdf String(padded Sig)Hex Writing(true)); appearance.close(dic2); byte[] pdf = Byte Array(); The first option, is not viable, because the PDF is signed without a timestamp (this is a very important requisite), - Have you considered applying a PAd ES part 4 style document timestamp?If that is no option, have you checked whether the integrated PDF signature returned by your service has still some reserved signature space left?This webservice, offers two options, send the PDF document, and it returns a signed pdf, or send a hash that will be signed. SUBFILTER, new Pdf Name("adbe.pkcs7.detached")); dic.put(Pdf Name. M, new Pdf Date(cal)); Crypto Dictionary(dic); Hash Map(); exc.put(Pdf Name.The first option, is not viable, because the PDF is signed without a timestamp (this is a very important requisite), so the second option is chosen. CONTENTS, Integer.value Of(reserved Value() * 2 + 2)); Certification Level(1); Close(exc); Abstract Checksum checksum = Jacksum Checksum Instance("sha1"); checksum.reset(); checksum.update(Utils.stream To Byte Array(Range Stream())); hash = Byte Array(); byte[] padded Sig = new byte[reserved Value()]; System.arraycopy(signed Hash, 0, padded Sig, 0, signed Hash.length); Pdf Dictionary dic = new Pdf Dictionary(); dic.put(Pdf Name. I have an application that generates a PDF, and that needs to be signed.

', null, true); appearance = Signature Appearance(); Crypto(null, chain, null, Pdf Signature Appearance. CONTENTS, new Pdf String(padded Sig)Hex Writing(true)); appearance.close(dic); byte[] pdf = Byte Array(); In this point, we get a PDF signed, but with an invalid signature.

CMS); byte[] padded Sig = new byte[reserved Value()]; System.arraycopy(encoded Sign, 0, padded Sig, 0, encoded Sign.length); Pdf Dictionary dic2 = new Pdf Dictionary(); dic2.put(Pdf Name.

So since you're generating the hash without this info probably the error is there.

In that case you can add a signature time stamp after the fact.

is included in the PDF an also necessary to perform the validation.

I think that we make something wrong in the process, and we don't know exactly what could be. Representant[0]"); Certificate(chain[0]); Pdf Signature dic = new Pdf Signature(Pdf Name. ADBE_PKCS7_DETACHED); Reason(Reason()); Location(Location()); Contact(Contact()); Date(new Pdf Date(Sign Date())); Crypto Dictionary(dic); Hash Map(); exc.put(Pdf Name.We appreciate help on this, or an alternative way to do that. Pdf Reader reader = new Pdf Reader(Base64.decode(pdf B64)); Appendable(true); baos = new Byte Array Output Stream(); Pdf Stamper stamper = Pdf Stamper.create Signature(reader, baos, '[[

I think that we make something wrong in the process, and we don't know exactly what could be. Representant[0]"); Certificate(chain[0]); Pdf Signature dic = new Pdf Signature(Pdf Name. ADBE_PKCS7_DETACHED); Reason(Reason()); Location(Location()); Contact(Contact()); Date(new Pdf Date(Sign Date())); Crypto Dictionary(dic); Hash Map(); exc.put(Pdf Name.

We appreciate help on this, or an alternative way to do that. Pdf Reader reader = new Pdf Reader(Base64.decode(pdf B64)); Appendable(true); baos = new Byte Array Output Stream(); Pdf Stamper stamper = Pdf Stamper.create Signature(reader, baos, '\0'); appearance = Signature Appearance(); Reason("Test"); Location("A casa de la caputeta"); Visible Signature("TMAQ-TSR[0]. CONTENTS, new Integer(reserved Value() * 2 + 2)); Close(exc); External Digest external Digest = new External Digest() { public Message Digest get Message Digest(String hash Algorithm) throws General Security Exception { return Digest Message Digest(hash Algorithm, null); } }; sgn = new Pdf PKCS7(null, chain, "SHA256", null, external Digest, false); Input Stream data = Range Stream(); hash = Digest Algorithms.digest(data, external Message Digest("SHA256")); cal = Instance(); byte[] sh = Authenticated Attribute Bytes(hash, cal, null, null, Crypto Standard.

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I think that we make something wrong in the process, and we don't know exactly what could be. Representant[0]"); Certificate(chain[0]); Pdf Signature dic = new Pdf Signature(Pdf Name. ADBE_PKCS7_DETACHED); Reason(Reason()); Location(Location()); Contact(Contact()); Date(new Pdf Date(Sign Date())); Crypto Dictionary(dic); Hash Map(); exc.put(Pdf Name.We appreciate help on this, or an alternative way to do that. Pdf Reader reader = new Pdf Reader(Base64.decode(pdf B64)); Appendable(true); baos = new Byte Array Output Stream(); Pdf Stamper stamper = Pdf Stamper.create Signature(reader, baos, '\0'); appearance = Signature Appearance(); Reason("Test"); Location("A casa de la caputeta"); Visible Signature("TMAQ-TSR[0]. CONTENTS, new Integer(reserved Value() * 2 + 2)); Close(exc); External Digest external Digest = new External Digest() { public Message Digest get Message Digest(String hash Algorithm) throws General Security Exception { return Digest Message Digest(hash Algorithm, null); } }; sgn = new Pdf PKCS7(null, chain, "SHA256", null, external Digest, false); Input Stream data = Range Stream(); hash = Digest Algorithms.digest(data, external Message Digest("SHA256")); cal = Instance(); byte[] sh = Authenticated Attribute Bytes(hash, cal, null, null, Crypto Standard.

]]'); appearance = Signature Appearance(); Reason("Test"); Location("A casa de la caputeta"); Visible Signature("TMAQ-TSR[0]. CONTENTS, new Integer(reserved Value() * 2 + 2)); Close(exc); External Digest external Digest = new External Digest() { public Message Digest get Message Digest(String hash Algorithm) throws General Security Exception { return Digest Message Digest(hash Algorithm, null); } }; sgn = new Pdf PKCS7(null, chain, "SHA256", null, external Digest, false); Input Stream data = Range Stream(); hash = Digest Algorithms.digest(data, external Message Digest("SHA256")); cal = Instance(); byte[] sh = Authenticated Attribute Bytes(hash, cal, null, null, Crypto Standard.