digital-signature

问题 We have a process that uses OpenSSL to generate S/MIME digital signatures which need to be verified later using Java 7. On one side we use OpenSSL to read in text files and generate a signed digital output which is verified later. We used to have the verification using OpenSSL but now we need Java (note: we cannot count on OpenSSL being available now). We use this to sign: openssl smime -sign -inkey private.key -signer public.key -in ${f} > ${f}.signed and this to verify: openssl smime

问题 I am reading about XML signature from w3 page As per my understanding, to Sign an XML: Create a Canonical XML of the XML Data to be signed. Create a hash (digest) of the Canonicalised XML Data using an algorithm mentioned in <DigestMethod/> . Hash will go inside <DigestValue> Encrypt above has using algorithm mentioned in <SignatureMethod/> . This algorithm will take Sender's private key as an input. Signature will go inside <SignatureValue> To Verify (at receiver's end): Use the public key

问题 I am reading about XML signature from w3 page As per my understanding, to Sign an XML: Create a Canonical XML of the XML Data to be signed. Create a hash (digest) of the Canonicalised XML Data using an algorithm mentioned in <DigestMethod/> . Hash will go inside <DigestValue> Encrypt above has using algorithm mentioned in <SignatureMethod/> . This algorithm will take Sender's private key as an input. Signature will go inside <SignatureValue> To Verify (at receiver's end): Use the public key

问题 I'm trying to understand how the jwt signature validation works. This is how I'm doing it at the moment: 1) My app calls the attest api 2) My app sends the jwt to my server 3) My server verify the signature (third field of the jwt) using the certificate provided in the header of the jwt. I understand that the signature is created by hashing the header and the payload of the jwt and then signing it (encrypting it) with Google's private key. What I do in my step 3 is that I take the header +

问题 Trying to validate PDF signature isn't working. The PDF were signed by Adobe Acrobat and then trying to verify it with the public key of the client certificate. So I get the public key of the client certificate, hash the PDF and verify if the hash is equal to the pdf signature, but it fails. HttpClientCertificate cert = request.ClientCertificate; X509Certificate2 cert2 = new X509Certificate2(cert.Certificate); PdfReader pdfreader = new PdfReader("path_to_file"); AcroFields fields = pdfreader

问题 Trying to validate PDF signature isn't working. The PDF were signed by Adobe Acrobat and then trying to verify it with the public key of the client certificate. So I get the public key of the client certificate, hash the PDF and verify if the hash is equal to the pdf signature, but it fails. HttpClientCertificate cert = request.ClientCertificate; X509Certificate2 cert2 = new X509Certificate2(cert.Certificate); PdfReader pdfreader = new PdfReader("path_to_file"); AcroFields fields = pdfreader

问题 As i understand this from Hexagon DSP document: To enable a .so to be successfully deployed on production devices across a large number of OEM devices, the dynamic module needs to be production signed by the OEM. ISVs are encouraged to work with their OEM POCs to have the modules production signed for OEM devices. So, is there any way i can get my .so(s) to work on production device (OnePlus 3T running OxygenOS originally)? I have tried to root the device by compiling LineageOS and installing

问题 I want to use iText to embed signed hash and public in PDF. As per arguments to sign method in iText 7 I need to pass certificate chain, How can I create this certificate object directly from public key string? Update 1 Below is small c# code. You can see I am trying to get x509 certificate from public key. This certificate will be used to verify the signed data from corresponding private key. Also it will be used to embed this public certificate and signed hash into PDF for digital signature

问题 I have created a signed PDF using iTextSharp in C# .Net. In the signed PDF I want to have a validity symbol so that when a user opens it in Adobe Reader it shows a green tick mark along with its signature. But in my web application (a html page with canvas) I want to remove that question mark from the PDF so that it does not show like in this screen: So I want to keep the original bytes of the PDF in which signatureappearance.Acro6Layers = false; is added in code to get this symbol. But

问题 I'm trying to validate a signed message using a smart contract running on the TRON network. I've tried a few different methods but all failed: Based on this article I've deployed the following smart contract: contract Verifier { function recoverAddr(bytes32 msgHash, uint8 v, bytes32 r, bytes32 s) returns (address) { return ecrecover(msgHash, v, r, s); } function isSigned(address _addr, bytes32 msgHash, uint8 v, bytes32 r, bytes32 s) returns (bool) { return ecrecover(msgHash, v, r, s) == _addr