aes

TypeError: decrypt() cannot be called after encrypt()

由 这一生的挚爱 提交于 2020-06-27 21:35:36
问题 I am writing a simple code of AES encryption. I got stuck at a part where it says decrypt() cannot be called after encrypt(). I scrapped through the internet to find the solution, but unable to do so, maybe because of the lack of proper documentation examples. I tried changing the sequence these lines, but it did not help encrypted = encrypt(message) decrypted = decrypt(encrypted) I have 2 examples Example1 from Crypto.Cipher import AES key = 'ACD310AE179CE245624BB238867CE189' message = 'this

openssl aes gcm encryption with authentication TAG; command line

由 你说的曾经没有我的故事 提交于 2020-06-27 17:40:26
问题 I'm trying to encrypt a file in AES-GCM mode with 'openssl' th/ command line openssl enc -aes-256-gcm -p -iv 000000000000000000000000 -K 00000000000000000000000000000000000000000000000000000000000000 -nosalt -in file.raw -out file.enc` Encryption works but I could not find a way to retrieve a resulting GCM tag. Is there a way to get it? In this document (link) I found "Note that it is now even possible to use authenticated mode like CCM or GCM" but still there is none info how to do that. Or

Store data securely in memory (password based encryption)

由 混江龙づ霸主 提交于 2020-06-27 05:48:10
问题 I have to store the key into memory. So as security concern we can not store the cryptographic key into the memory directly, We need to store the key in Encrypted way. So the idea is we store the key in encrypted manner and at the time of crypto operation, just decrypt the key and use it and dispose the key. So we are using Password based encryption(PBE) define in BouncyCastle c# version Example code. The problem in code is that the password is fix here. I have to generate the password at run

Store data securely in memory (password based encryption)

由 馋奶兔 提交于 2020-06-27 05:47:11
问题 I have to store the key into memory. So as security concern we can not store the cryptographic key into the memory directly, We need to store the key in Encrypted way. So the idea is we store the key in encrypted manner and at the time of crypto operation, just decrypt the key and use it and dispose the key. So we are using Password based encryption(PBE) define in BouncyCastle c# version Example code. The problem in code is that the password is fix here. I have to generate the password at run

android.security.KeyStoreException: Unknown error On a rare number of devices

由 别等时光非礼了梦想. 提交于 2020-06-12 05:27:05
问题 I'm getting android.security.KeyStoreException: Unknown error On a rare number of devices with different Android Versions (6 - 8) This is my key generation code: final KeyPairGenerator keyGenerator = KeyPairGenerator .getInstance(KeyProperties.KEY_ALGORITHM_RSA, ANDROID_KEY_STORE); keyGenerator.initialize(new KeyGenParameterSpec.Builder(ALIAS, KeyProperties.PURPOSE_ENCRYPT | KeyProperties.PURPOSE_DECRYPT) .setKeySize(2048) .setEncryptionPaddings(KeyProperties.ENCRYPTION_PADDING_RSA_PKCS1)

AES Negative bytes

由 和自甴很熟 提交于 2020-05-23 07:46:32
问题 The following is an extract from using AES encryption in Java: encryptedData = encryptCipher.doFinal(strToEncrypt.getBytes()); The following is an extract in c# DecryptStringFromBytes_Aes(encrypted, myAes.Key, myAes.IV); Both use a byte array one to encrypt the other to decrypt, the encryption in Java encrypts producing some negative values stored in a byte array. C# uses a byte array to decrypt but a byte in C# is defined as only containing the numbers from 0..255 - Java defines its Byte

Laravel AES-256 Encryption & MySQL

由 假如想象 提交于 2020-05-21 07:16:25
问题 I'm trying to encrypt sensitive user information via Laravel's (5.3) encrypt method which uses AES-256-CBC. After encrypting the data I want to store it in my MySQL database but I don't know what type should I save it as nor the length of it. Any help is appreciated. 回答1: Update PR 31721 has been merged into Laravel 7.0.8, which fixes the escaped forward slashes in the json encoding. Before this, encrypting the same data would give you variable size results. Now, as of 7.0.8, encrypting the

Laravel AES-256 Encryption & MySQL

由 谁说胖子不能爱 提交于 2020-05-21 07:13:02
问题 I'm trying to encrypt sensitive user information via Laravel's (5.3) encrypt method which uses AES-256-CBC. After encrypting the data I want to store it in my MySQL database but I don't know what type should I save it as nor the length of it. Any help is appreciated. 回答1: Update PR 31721 has been merged into Laravel 7.0.8, which fixes the escaped forward slashes in the json encoding. Before this, encrypting the same data would give you variable size results. Now, as of 7.0.8, encrypting the

AES加密模式和填充方式，hash，md5，ca

由 落花浮王杯 提交于 2020-05-05 01:05:38
Java Cryptography Extension（JCE）是一组包，它们提供用于加密、密钥生成和协商以及 Message Authentication Code（MAC）算法的框架和实现。它提供对对称、不对称、块和流密码的加密支持，它还支持安全流和密封的对象。 JCE中AES支持五中模式：CBC，CFB，ECB，OFB，PCBC；支持三种填充：NoPadding，PKCS5Padding，ISO10126Padding。不支持SSL3Padding。不支持“NONE”模式。 其中AES/ECB/NoPadding和我现在使用的AESUtil得出的结果相同(在16的整数倍情况下)。 不带模式和填充来获取AES算法的时候，其默认使用ECB/PKCS5Padding。 算法/模式/填充 16字节加密后数据长度 不满16字节加密后长度 AES/CBC/NoPadding 16 不支持 AES/CBC/PKCS5Padding 32 16 AES/CBC/ISO10126Padding 32 16 AES/CFB/NoPadding 16 原始数据长度 AES/CFB/PKCS5Padding 32 16 AES/CFB/ISO10126Padding 32 16 AES/ECB/NoPadding 16 不支持 AES/ECB/PKCS5Padding 32 16 AES/ECB

Chrome 80 how to decode cookies

由 和自甴很熟 提交于 2020-04-28 20:42:21
问题 I had a working script for opening and decrypting Google Chrome cookies which looked like: decrypted = win32crypt.CryptUnprotectData(enctypted_cookie_value, None, None, None, 0) It seems that after update 80 it is no longer a valid solution. According to this blog post https://blog.nirsoft.net/2020/02/19/tools-update-new-encryption-chrome-chromium-version-80/ it seems that i need to CryptUnprotectData on encrypted_key from Local State file, than somehow decrypt cookie, using decrypted key.
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