cryptography

问题 I'm trying to convert this C# code to Python (2.5, GAE). The problem is that the encrypted string from the python script is different each time the encryption (on the same string) is run. string Encrypt(string textToEncrypt, string passphrase) { RijndaelManaged rijndaelCipher = new RijndaelManaged(); rijndaelCipher.Mode = CipherMode.CBC; rijndaelCipher.Padding = PaddingMode.PKCS7; rijndaelCipher.KeySize = 128; rijndaelCipher.BlockSize = 128; byte[] pwdBytes = Encoding.UTF8.GetBytes(passphrase

问题 I'm trying to convert this C# code to Python (2.5, GAE). The problem is that the encrypted string from the python script is different each time the encryption (on the same string) is run. string Encrypt(string textToEncrypt, string passphrase) { RijndaelManaged rijndaelCipher = new RijndaelManaged(); rijndaelCipher.Mode = CipherMode.CBC; rijndaelCipher.Padding = PaddingMode.PKCS7; rijndaelCipher.KeySize = 128; rijndaelCipher.BlockSize = 128; byte[] pwdBytes = Encoding.UTF8.GetBytes(passphrase

问题 I'm trying to digitally sign an XML document using Java. I've got an implementation working with some references I've found that use various implementations in the javax.xml.crypto.dsig package. However, my current implementation is like many of the examples I've looked at - it's rather verbose and involves using no less than 23 different API classes from the java.xml.crypto.dsig , javax.xml.transform , and java.security packages, among others. It feels like I've entered factory factory

问题 I know the curve name ( secp256k1 ) and the X and Y coordinates of the EC public key. How do I make a org.bouncycastle.jce.interfaces.ECPublicKey out of them? I've read https://stackoverflow.com/a/29355749/5453873 but the code there uses java.security... instead of org.bouncycastle... and ECPublicKey is an interface in org.bouncycastle... not an instantiable class. 回答1: Generating ECPublicKey using Bouncy Castle This generates the EC public key as used in the JCE/JCA. The Bouncy Castle

问题 i'm trying to encrypt and decrypt username in app using KeyStore, Using KeyPairGeneratorSpec to create the key in older version like 18 to 22, KeyPairGeneratorSpec as been depricated in version 23 of android M, But Android M supports KeyGenParameterSpec. Does this KeyGenParameterSpec supports backward comparability or how do i do this ? Im trying out some thing like this , is there any better solution for this. This works fine as off now! At the time of Ciper.getInstance in encryption and

问题 i'm trying to encrypt and decrypt username in app using KeyStore, Using KeyPairGeneratorSpec to create the key in older version like 18 to 22, KeyPairGeneratorSpec as been depricated in version 23 of android M, But Android M supports KeyGenParameterSpec. Does this KeyGenParameterSpec supports backward comparability or how do i do this ? Im trying out some thing like this , is there any better solution for this. This works fine as off now! At the time of Ciper.getInstance in encryption and

问题 This question already has answers here : Closed 8 years ago . Possible Duplicate: Is it possible to decrypt md5 hashes? I hashed data with ComputeHash how can I learn original data from hashed data? private void btn_Hash_Click(object sender, EventArgs e) { HashAlgorithm ha = HashAlgorithm.Create(); Stream file = new FileStream(@"C:\temp\simetrik.txt", FileMode.Open, FileAccess.Read); hashClass.hash = ha.ComputeHash(file); listBox1.Items.Add(BitConverter.ToString(hashClass.hash)); } 回答1: You

问题 I am fetching my certificate from Azure Key Vault using GetSecretAsync() method and then I am expecting to get the byte[] of the private key and the certificate eventually. I have my application in .netcore3.1 This is how my code looks like : var certWithPrivateKey = Client.GetSecretAsync(ConfigurationSettings.AppSettings["AKVEndpoint"], ConfigurationSettings.AppSettings["CertName"]).GetAwaiter().GetResult(); var privateKeyBytes = Convert.FromBase64String(certWithPrivateKey.Value);

问题 Some of developers need to move storage from parse.com to another servers. When I exported my data from parse, I get json data. This json data has encrypted passwords (bcrypt) like: $2a$10$pcR4SaZd3PMD/nXQKMssxupMLncDoFwfU7avg/wdpLVChNqGOXbLu I try to understand, how to check password from user in this case. I using jBcrypt like this: import org.mindrot.jbcrypt.BCrypt; public class Main { public static void main(String[] args) { String candidate = "$2a$10$pcR4SaZd3PMD/nXQKMssxupMLncDoFwfU7avg

问题 This question already has answers here : IllegalBlockSizeException when trying to encrypt and decrypt a string with AES (4 answers) Closed 3 years ago . I am trying to implement RSA encryption which is able to do the following: accept a string value as an input to encrypt using a public key return the encrypted cipher as string accept the encrypted cipher as an input to decrypt using a private key return the original value, decrypted I am able to get the encryption/decryption working if I