bouncycastle

问题 The case: I am maintaining a Java applet which uses the BouncyCastle libraries bcpkix-jdk15on-149.jar , and bcprov-jdk15on-149.jar . Problem is when the applet is run on a JRE version 7_u40 enabled browser. The behavior has changed from version 7_u25 in a way that it always prompts a modal window like "Security prompt for an app using a self-signed certificate" (which cannot be permanently hidden anymore), just to trust bcprov . https://www.java.com/en/download/help/appsecuritydialogs.xml As

问题 I am trying to use C# to read in a .pem file that contains only a RSA public key. I do not have access to the private key information, nor does my application require it. The file myprivatekey.pem file begins with -----BEGIN PUBLIC KEY----- and ends with -----END PUBLIC KEY----- . My current code is as follows: Org.BouncyCastle.Crypto.AsymmetricCipherKeyPair keyPair; using (var reader = File.OpenText(@"c:\keys\myprivatekey.pem")) keyPair = (Org.BouncyCastle.Crypto.AsymmetricCipherKeyPair)new

问题 Can anyone show me (or provide a link to) an example of how to encrypt a file in Java using bouncy castle? I've looked over bouncycastle.org but cannot find any documentation of their API. Even just knowing which classes to use would be a big help for me to get started! 回答1: What type of encryption do you want to perform? Password-based (PBE), symmetric, asymmetric? Its all in how you configure the Cipher. You shouldn't have to use any BouncyCastle specific APIs, just the algorithms it

问题 I'm trying to generate a public key given a private key and known curve. Below is my code: // Generate Keys ECGenParameterSpec ecGenSpec = new ECGenParameterSpec("secp256r1"); KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("ECDSA", "BC"); keyPairGenerator.initialize(ecGenSpec, new SecureRandom()); java.security.KeyPair pair = keyPairGenerator.generateKeyPair(); ECPrivateKey privateKey = (ECPrivateKey) pair.getPrivate(); ECPublicKey publicKeyExpected = (ECPublicKey) pair

问题 I'm implementing a factory pattern for 3 different cryptography classes. The factory will determine which one to create and then get a serialized instance of the correct class from a database and return it to the requester. Right now I'm working on serializing the classes to store them in the database. I'm writing one for a PGP cryptography class called BouncyCastle . I can create the class and the keys from files but when I try to serialize it, it says that the two member variables, which

问题 I am trying to validate DN in java. So far I have tried to validate it using Bouncy castle libry private boolean isValidDn(String dn) { try { X509Name name = new X509Name(dn); return true; } catch (IllegalArgumentException e) { } return false; } This code is working but the problem is this code allows to have multiple CN. For example: this code return true for CN=first,CN=second,ou=org,ou=org2,c=US But I want validation that return true only if there is one cn,ou,o,c etc.. Any help would be

问题 I am using the "BouncyCastle.Crypto.dll" for encrypt/decrypt a string in my app. I am using the following code from this blog: I have a class BCEngine, exactly the same as the one given in the link mentioned above. public class BCEngine { private readonly Encoding _encoding; private readonly IBlockCipher _blockCipher; private PaddedBufferedBlockCipher _cipher; private IBlockCipherPadding _padding; public BCEngine(IBlockCipher blockCipher, Encoding encoding) { _blockCipher = blockCipher;

问题 My application is accessing e-Token for decrypting the response coming from the server The session key from the server is encrypted using :- RSA/ECB/OAEPWITHSHA-256ANDMGF1PADDING I am using SunPKCS11 Provider for implementing the access to crypto token. Whenever i try to decrypt this using the above mechanishm i.e. with RSA/ECB/OAEPWITHSHA-256ANDMGF1PADDING i am getting :- **javax.crypto.BadPaddingException: doFinal() failed at sun.security.pkcs11.P11RSACipher.implDoFinal(P11RSACipher.java

问题 My application is accessing e-Token for decrypting the response coming from the server The session key from the server is encrypted using :- RSA/ECB/OAEPWITHSHA-256ANDMGF1PADDING I am using SunPKCS11 Provider for implementing the access to crypto token. Whenever i try to decrypt this using the above mechanishm i.e. with RSA/ECB/OAEPWITHSHA-256ANDMGF1PADDING i am getting :- **javax.crypto.BadPaddingException: doFinal() failed at sun.security.pkcs11.P11RSACipher.implDoFinal(P11RSACipher.java

问题 I am looking to convert an RSA public key into something that I could use as an SSH public key. Currently I have Bouncy Castle producing me a public key that looks like this: -----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAq1Y5300i8bN+cI2U3wJE Kh3xG/.........jbuz+WB0vvG P25UwCle2k5siVMwbImEYsr+Xt0dsMmGVB3/6MHAqrM3QQdQ8p2E5TyzL+JYa1FT gwIDAQAB -----END PUBLIC KEY----- I want it to have an RFC 4716 format similar to this: ssh-rsa AAAAB3NzaC1yc2......