digital-signature

问题 I have two clients, first client expect CMS/PKCS to verify signature second client expect only signature (EncryptedDigestMessage). Original file and certificate separately to verify signature So, I want to create one method that should return the appropriate output based on format (PKCS or SignOnly) public static byte[] digitalSign(byte[] fileContent , PrivateKey privkey , X509Certificate x509Certificate , String format) throws Exception{ Security.addProvider(new BouncyCastleProvider()); List

问题 As I understand it: to check the validity of a JWT created using an asymmetric public/private key encryption algorithm, you require the public key along with the JWT header, claim (aka payload) and signature. The JWT header and claim can be decoded freely but can't be verified without the public key to validate the signature with (which is based on the header & claim and created with the private key). My question is, why not just bundle the public key into the claim payload of the token. That

问题 As I understand it: to check the validity of a JWT created using an asymmetric public/private key encryption algorithm, you require the public key along with the JWT header, claim (aka payload) and signature. The JWT header and claim can be decoded freely but can't be verified without the public key to validate the signature with (which is based on the header & claim and created with the private key). My question is, why not just bundle the public key into the claim payload of the token. That

问题 I want to sign a file i created using a pair of RSA keys I created using key tool and the following command: keytool -genkeypair -alias key -keyalg RSA -keysize 2048 -sigalg SHA256withRSA -validity 365 -keystore keystore.jks I want to initialize my Signature object so I tried this: PrivateKey privateKey = (PrivateKey) keyStore.getKey(PRIVATE_KEY_ALIAS,privateKeyPassword); Signature signature = Signature.getInstance(SIGNATURE_ALGORITHM); signature.initSign(privateKey); But I got this exception

问题 This problem may not be as simple as the title says, because for some reason, I am not authorized to have a certificate, and I can only give the program (not the code) to another person for digitally sign. I'll elaborate on the following. What I already know is that after I upload the app to MS store, Ms store will automatically sign my app, but it seems that it will only sign the msixbundle file. because in this path: C:\Program Files\WindowsApps\[AppName]_[AppVersion]_neutral__[PackageID] ,

问题 I don't really understand how to work with PKCS#7 messages. I sign some byte array with a X509Certificate2 I have and get also a byte array. byte[] data = new byte[5] { 110, 111, 112, 113, 114 }, signedData; X509Certificate2 cert = new X509Certificate2(certPath, password); ContentInfo content = new ContentInfo(data); SignedCms envelope = new SignedCms(content); CmsSigner cmsSigner = new CmsSigner(cert); envelope.ComputeSignature(cmsSigner); signedData = envelope.Encode(); The signedData is

问题 I am trying to sign pdf document digitally and need to attach signature to signature panel using MSSP(mobile signature service provider). I researched some stackoverflow questions and i did things as below. First i create checksum of pdf. Before generate the checksum add empty signature to pdf. After i generated the checksum i send that as data to sign document to the server. The server gives to me base64 signature and i found certificate chain from base64 signature. Now i need to attach

问题 I am trying to sign pdf document digitally and need to attach signature to signature panel using MSSP(mobile signature service provider). I researched some stackoverflow questions and i did things as below. First i create checksum of pdf. Before generate the checksum add empty signature to pdf. After i generated the checksum i send that as data to sign document to the server. The server gives to me base64 signature and i found certificate chain from base64 signature. Now i need to attach

问题 I need someone to help me understand XML digital signature method rsa-sha1 . I suppose the signature value = RSA-encrypt(sha1(signedInfo), privatekey). Note Base64.encode(sha1(signedInfo)) contains 28 characters. So I think Base64.encode(RSA-decrypt(signaturevalue), publickey) should return 28 characters as well. However, I actually got a 48-character string. Base64 base64 = new Base64(); byte[] encrypted = base64.decode(signatureValue); try { Cipher cipher = Cipher.getInstance("RSA"); cipher

问题 I need to create a WCF client who calls a bea webservice. I keep getting this response from the webservice: Could not validate signature using any of the supported token types So I turn my attention to the signature part of the client<->service communication: Part of the wsdl from the webservice: <s0:Policy s1:Id="Sign.xml"> <wssp:Integrity xmlns:wls="http://www.bea.com/wls90/security/policy/wsee#part" xmlns:wssp="http://www.bea.com/wls90/security/policy" xmlns:wsu="http://docs.oasis-open.org