encryption | Encryption program write by PHP | Encryption library
kandi X-RAY | encryption Summary
kandi X-RAY | encryption Summary
Encryption program write by PHP.
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of encryption
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QUESTION
I'm trying to use the AES crate, which offers three algorithms: AES128, AES192 and AES256. I'm trying to create a struct that can create the correct algorithm by detecting the key size, and save it to later use.
I see they all implement the BlockEncrypt (I only need encryption) trait, but when I try to make a field in the struct with this type, even when supplying the size, i get an "the trait BlockEncrypt
cannot be made into an object. the trait cannot be made into an object because it requires Self: Sized
" error.
ANSWER
Answered 2022-Apr-03 at 19:42As @cdhowie mentioned, you can't create a trait object from a trait with a Sized
bound. Instead, you can create an enum:
QUESTION
Based on the example provided here on how to establish a shared secret and derived key between JS (Crypto-JS) and Python, I can end up with the same shared secret and derived key on both ends.
However, when I try to encrypt as below, I cannot find a way to properly decrypt from Python. My understanding is that probably I am messing with the padding or salts and hashes.
...ANSWER
Answered 2022-Mar-28 at 11:29The issue is that the key is not passed correctly in the CryptoJS code.
The posted Python code generates LefjQ2pEXmiy/nNZvEJ43i8hJuaAnzbA1Cbn1hOuAgA=
as Base64-encoded key. This must be imported in the CryptoJS code using the Base64 encoder:
QUESTION
I am trying to read a PKCS#8 private key which looks like following:
key.k8 --> (Sample key. Passphrase - 123456):
...ANSWER
Answered 2022-Jan-30 at 12:33Edit:
On second thought, when creating the JceOpenSSLPKCS8DecryptorProviderBuilder
, you're not explicitly specifying the provider:
QUESTION
I am using CryptoSwift 1.4.1, iOS 15.2, PyCryptodome 3.12.0, and XCode 13.2.1 to encrypt small string messages that I send to a Raspberry Pi Linux Device over BLE. It works when iOS encrypts the message and sends it to the Raspberry Pi. The Pi can successfully decrypt it. Now I want to do the inverse, encrypt a message on the Pi and have the iOS App read and decrypt it. This, however is not working and the decrypted value is the not the message I encrypted on the Pi.
Working iOS encryption:
...ANSWER
Answered 2022-Jan-28 at 10:30In the encrypt()
method the IV is not considered. As in aesEncrypt()
, the IV must be passed and used when creating the AES object.
Furthermore there are bugs in the encoding: The plaintext must be UTF8 encoded and the ciphertext must be hex encoded:
QUESTION
I use kms.decrypt() method from boto3 package. For typing support I use the boto3-stubs package.
The decrypt method has attribute EncryptionAlgorithm
, which is typed as
ANSWER
Answered 2021-Nov-14 at 17:00You can use typing.get_args
to get the arguments passed in to typing.Literal
. In this case, you'll need to combine it with typing.cast
so you can signal to "mypy" that the string value that the function returns is an acceptable Literal
value.
QUESTION
I'm trying to implement a function in Java to calculate the key check value for a 128 bit AES encryption key. The AES128CBCEncryptor class is implementing AES/128/CBC with ISO 9797-1 M2 padding.
The only information I can find on the key check value algorithm for AES says "the KCV for an AES key is computed by encrypting 16 bytes, each with value '01'.". It does not specify how the IV should be constructed.
Here is what I have thus far, but it's not generating the expected result:
...ANSWER
Answered 2022-Jan-13 at 16:47For a Key Check Value (KCV) one generally uses single block encryption, without any mode such as ECB or CBC. As only a constant value of 16 bytes is used, there is no need for padding either.
If you just have a CBC class that performs ISO 9797-1 M2 padding then you could encrypt the static value of 01010101010101010101010101010101
(hex encoding of 16 bytes), using an all-zero IV and taking the first 16 bytes from the result (removing 16 bytes of ciphertext at the end that is just encryption of the mandatory padding).
As you can see in the image below, because the IV is all zero, the XOR with the plaintext leaves the input intact, basically making the first ciphertext identical to direct encryption with the block cipher.
By WhiteTimberwolf (SVG version) - PNG version, Public Domain, https://commons.wikimedia.org/w/index.php?curid=26434096
However, as you are using Java, it makes more sense to use a Cipher
object using algorithm "AES/ECB/NoPadding"
and use that to encrypt the value of 01010101010101010101010101010101
directly. ECB doesn't take an IV, so that problem is avoided. Also, no padding needs to be considered when "NoPadding"
is specified.
If you need fewer bytes: those are usually taken from the left (lowest index) of the result.
Beware that these kinds of KCV's are somewhat dangerous as they show the ciphertext of one particular plaintext block. In the worst instances, this could lead to an adversary decrypting one ciphertext block, or for an authenticated scheme to lose its integrity/authentication properties.
Commonly KCV's are over an all-zero plaintext block. Using an all one-valued block makes the chance that this happens smaller, but that chance is still significant.
QUESTION
How to convert the following Node's built-in crypto module encryption to CryptoJS?
...ANSWER
Answered 2022-Jan-10 at 21:43Both codes use the OpenSSL proprietary key derivation function EVP_BytesToKey()
with an iteration count of 1 and MD5 as digest.
NodeJS does not use a salt, while CryptoJS applies a random salt. For this reason, the NodeJS result is unchanged for each encryption, while the CryptoJS result always changes (assuming the same plaintext and passphrase).
Thus, to get the result of the NodeJS code with the CryptoJS code, you must not use a salt. However, by default, a salt is always applied. This can only be circumvented by explicitly determining key and IV with the key derivation function EvpKDF
and then using both in the encryption:
QUESTION
I'm using a string Encryption/Decryption class similar to the one provided here as a solution.
This worked well for me in .Net 5.
Now I wanted to update my project to .Net 6.
When using .Net 6, the decrypted string does get cut off a certain point depending on the length of the input string.
▶️ To make it easy to debug/reproduce my issue, I created a public repro Repository here.
- The encryption code is on purpose in a Standard 2.0 Project.
- Referencing this project are both a .Net 6 as well as a .Net 5 Console project.
Both are calling the encryption methods with the exact same input of "12345678901234567890"
with the path phrase of "nzv86ri4H2qYHqc&m6rL"
.
.Net 5 output: "12345678901234567890"
.Net 6 output: "1234567890123456"
The difference in length is 4
.
I also looked at the breaking changes for .Net 6, but could not find something which guided me to a solution.
I'm glad for any suggestions regarding my issue, thanks!
Encryption Class
...ANSWER
Answered 2021-Nov-10 at 10:25The reason is this breaking change:
DeflateStream, GZipStream, and CryptoStream diverged from typical Stream.Read and Stream.ReadAsync behavior in two ways:
They didn't complete the read operation until either the buffer passed to the read operation was completely filled or the end of the stream was reached.
And the new behaviour is:
Starting in .NET 6, when Stream.Read or Stream.ReadAsync is called on one of the affected stream types with a buffer of length N, the operation completes when:
At least one byte has been read from the stream, or The underlying stream they wrap returns 0 from a call to its read, indicating no more data is available.
In your case you are affected because of this code in Decrypt
method:
QUESTION
I'm trying to find a python equivalent of this js function:
...ANSWER
Answered 2021-Dec-17 at 18:59According to the documentation of the JavaScript library the line
QUESTION
My hexidigit is changing on day by day basis. How can I change it back to static
Code
...ANSWER
Answered 2021-Dec-13 at 08:04I got the solution by encrypting the key using bytes() Use the byte method to store the key in secured config file or database and encrypt the byte string to get the key. After that use any cipher method with suitable algorithm to encrypt the data and mask it.
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Install encryption
PHP requires the Visual C runtime (CRT). The Microsoft Visual C++ Redistributable for Visual Studio 2019 is suitable for all these PHP versions, see visualstudio.microsoft.com. You MUST download the x86 CRT for PHP x86 builds and the x64 CRT for PHP x64 builds. The CRT installer supports the /quiet and /norestart command-line switches, so you can also script it.
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