aes

问题 Im trying to implement file decryption by referring this code: Encryption part i have done this way: https//stackoverflow.com/questions/64423926/encrypt-file-in-java-and-decrypt-in-openssl-with-key-aes And the encrypted file im able to decrypt with openssl. But the decrypt to file in java is causing error: java.lang.IllegalArgumentException: Illegal base64 character 5f at java.util.Base64$Decoder.decode0(Unknown Source) at java.util.Base64$Decoder.decode(Unknown Source) at java.util.Base64

问题 Im trying to implement file decryption by referring this code: Encryption part i have done this way: https//stackoverflow.com/questions/64423926/encrypt-file-in-java-and-decrypt-in-openssl-with-key-aes And the encrypted file im able to decrypt with openssl. But the decrypt to file in java is causing error: java.lang.IllegalArgumentException: Illegal base64 character 5f at java.util.Base64$Decoder.decode0(Unknown Source) at java.util.Base64$Decoder.decode(Unknown Source) at java.util.Base64

问题 I've array of objects , each object may have these :[ "id", "start_long", "start_lat", "start_date", "type", "second_user_id", "end_long", "end_lat", "end_date", "feedback"] when i try to decode a based64String , I get nil , I've tried to use CryptoSwift , RNCryptor I want to pass 64based string the key ass method key key : tK5UTui+DPh8lIlBxya5XVsmeDCoUl6vHhdIESMB6sQ= 回答1: AES Encryption / Decryption using base64 key, salt and iv (Initialization Vector). 1) Import CommonCrypto. This is Apple

问题 I have encrypted a file using below commands openssl rand 32 > test.key openssl enc -aes-256-cbc -iter 10000 -pbkdf2 -salt -in test.txt -out test.txt.enc -pass file:test.key Now i am trying to decrypt it using java. tring since last few days but no success. Can anyone help ? my code package test; import java.io.BufferedReader; import java.io.File; import java.io.FileInputStream; import java.io.FileReader; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream;

问题 I'm trying to use the prescribed validation procedure for AES-128 in CBC mode, as defined in the NIST AESAVS standard. One of the more important parts of the test suite is the Monte Carlo test, which provides an algorithm for generating many 10000 pseudorandom tests cases such that it is unlikely that a hardcoded circuit could fake AES. The algorithm pseudocode therein appears to be taking some liberties with variable scope and definition, so I am hoping someone could help me fill in the

问题 Is it possible to encrypt mpeg-dash clear content in ffmpeg? or do we need to additional code to handle the encryption? From ffmpeg dashenc.c code it appears that dash code does not encrypt the content. Can we reuse the mp4 muxer for encrypting and dash for segmenting? 回答1: You can use ffmpeg and openssl to create an AES encrypted HLS stream if this meets your needs - the ffmpeg documentation (http://ffmpeg.org/ffmpeg-all.html#Options-34) includes this example script: #!/bin/sh BASE_URL=${1:-

问题 I am using AES 256 cbc method to encrypt my files. The column which I am encrypting is called 'Name'. previously before encrypting I had set the varchar length in phpmyadmin for 'Name' to be 20. when I was trying to encrypt , I saw it was short and the entire encrypted string was not getting inserted in the database. So I changed the size of varchar to 50 but still the length is small. I have to do this for other column as well. How do I determine efficient length for 'Name' column. I am

问题 I want to encrypt data in an image but the resulting ciphertext to still be a valid image. I encrypt the image with AES in python and then, I replace header in the files, but windows can't open the encrypted image. Code def encrypt_file(self, in_filename, out_filename): filesize = os.path.getsize(in_filename) iv = Random.new().read(AES.block_size) cipher = AES.new(self.key, AES.MODE_ECB, iv) chunksize = 64 * 1024 with open(in_filename, 'rb') as infile: with open(out_filename, 'wb') as outfile

问题 I'm looking at an C# AES asymmetric encryption and decryption example here and not sure if i should store the IV in a safe place (also encrypted??). Or i can just attach it to the encrypted text for using later when i with to decrypt. From a short reading about AES it seems it's not needed at all for decryption but i'm not sure i got it right and also the aes.CreateDecryptor(keyBytes, iv) need it as parameter. I use a single key for all encryptions. 回答1: It's fairly standard to transmit the

问题 I'm performing MCT on AES 128 CBC as described in http://csrc.nist.gov/groups/STM/cavp/documents/aes/AESAVS.pdf The expected vector result for first iteration is KEY = 9dc2c84a37850c11699818605f47958c IV = 256953b2feab2a04ae0180d8335bbed6 PLAINTEXT = 2e586692e647f5028ec6fa47a55a2aab CIPHERTEXT = 1b1ebd1fc45ec43037fd4844241a437f Below function is used to generate first iteration output, void do_mct() { EVP_CIPHER_CTX *ctx = NULL; unsigned char key[16] = { 0x9d, 0xc2, 0xc8, 0x4a, 0x37, 0x85,