Binascii | Binary -- Ascii Converter
kandi X-RAY | Binascii Summary
kandi X-RAY | Binascii Summary
Binary <--> Ascii Converter
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Binascii Key Features
Binascii Examples and Code Snippets
Community Discussions
Trending Discussions on Binascii
QUESTION
I'm using Apple's CryptoKit to create keys for an iOS app, encrypt the data and then send it to the backend via JSON and store it in a PGSQL database.
While all of that is working perfectly, I need to be able to decrypt the data from the backend, and thus need to be able to create the same symmetric key I used to encrypt the data.
When I created the keys via Swift, it was done as follows:
...ANSWER
Answered 2022-Apr-15 at 12:01The Swift code generates a private key, determines the related public key, derives a shared secret using X25519, and derives the symmetric key using HKDF:
QUESTION
import binascii
import sys
from os.path import getsize
target = './'+sys.argv[1]
with open(target,'rb+') as f:
file_size = getsize(target)
string1 = f.read(6)
print("Size : %d"%file_size)
print (binascii.b2a_hex(string1))
ANSWER
Answered 2022-Feb-19 at 13:40QUESTION
I am trying to run some Python code in Azure, for the first time ever. I Googled 'how to run Python scripts in Azure' and came across the following link.
https://docs.microsoft.com/en-us/azure/automation/learn/automation-tutorial-runbook-textual-python-3
Essentially, I need to do this.
Open the textual editor by selecting Edit on the MyFirstRunbook-Python3 pane.
Add the following code to authenticate to Azure:
...ANSWER
Answered 2022-Feb-07 at 17:35Most likely you haven't created an Azure Run As Account. Follow the steps here to do so.
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've been trying to debug a Python script I've inherited. It's trying to POST a CSV to a website via HTTPLib. The problem, as far as I can tell, is that HTTPLib doesn't handle receiving a 100-continue response, as per python http client stuck on 100 continue. Similarly to that post, this "Just Works" via Curl, but for various reasons we need this to run from a Python script.
I've tried to employ the work-around as detailed in an answer on that post, but I can't find a way to use that to submit the CSV after accepting the 100-continue response.
The general flow needs to be like this:
- -> establish connection
- -> send data including "expect: 100-continue" header, but not including the JSON body yet
- <- receive "100-continue"
- -> using the same connection, send the JSON body of the request
- <- receive the 200 OK message, in a JSON response with other information
Here's the code in its current state, with my 10+ other commented remnants of other attempted workarounds removed:
...ANSWER
Answered 2022-Jan-25 at 03:40In case anyone comes across this problem in future, I ended up working around it with a bit of a kludge. I tried HTTPLib, Requests, and URLLib3 are all known to not handle the 100-continue header, so... I just wrote a Python wrapper around Curl via the subprocess.run() function, like this:
QUESTION
I have a shared key that I need to derive an iv from so I can decipher.
The apple business chat docs state:
Generate the Derived Key and Initial Vector
Run the shared key through the X9.63 Key Derivation Function with SHA256 hash function. This results in a 48-byte payload. Your results should be rV3qrszd0PMPgeRhNnlOYA==
Heres what I tried. I used scryptSync and pbkdf2Sync crypto functions with many 'salt' configurations. I'm unsure if these are the correct functions for this job.
...ANSWER
Answered 2022-Jan-04 at 11:46X9.63 KDF is a key derivation function, described e.g. here and here. scrypt and PBKDF2 are also KDFs, but different ones, so of course the expected result cannot be reproduced with them.
So you need a NodeJS library that supports X.963 KDF. If you can't find one, you could also implement your own.
X9.63 KDF expects a shared secret and a shared info and determines a keysize large key as follows:
- Create a 4 byte counter ci which is incremented starting with 0x0000001.
- Concatenate the data conci = shared secret | ci | shared info
- Hash the result hashi = hash(conci)
- Concatenate the hashes hash1 | hash2 | ... until an output of length keysize has been generated.
More formally, including various checks, the algorithm is described in the links above. The Python code posted later in the question also implements this logic.
One possible NodeJS implementation (omitting the checks from the specification) is:
QUESTION
i keep having a problem in my code coming back as Test Failed: unsupported operand type(s) for +: 'int' and 'tuple'.
i am a super beginner who is not very good at coding, so i cannot figure out what the issue is.
here is the full code.
i am making a simple icmp pinger program.
thanks everyone for your help!!! (this is my first question here so please let me know if i need to edit anything)
...ANSWER
Answered 2021-Dec-11 at 01:32The error occurs in this line:
QUESTION
I need the a string to be converted to bytes exactly as it is, so it would look like b and binascii.hexlify() would be the same for both a and b. Best way to do it? Python 3.10.0
...ANSWER
Answered 2021-Dec-04 at 05:39a = r'\x8e'
exec('my_string = b"' + a + '"')
print(my_string)
QUESTION
How can I convert a hexadecimal string = a5acf29e4d11f20b6dee54bf369ee0f8
To this exactly = (bytes([0xa5, 0xac, 0xf2, 0x9e, 0x4d, 0x11, 0xf2, 0x0b, 0x6d, 0xee, 0x54, 0xbf, 0x36, 0x9e, 0xe0, 0xf8])
I tried two approaches but they show in a different format.
- Using bytes.fromhex()
ANSWER
Answered 2021-Dec-01 at 07:53Since you have asked to display in a specific format you can easily do so on cost of your variable datatype
something like this might work
QUESTION
I installed the following package cose 0.9 from https://pypi.org/project/cose/
On their page, there is an example code:
...ANSWER
Answered 2021-Nov-30 at 17:31If you are on linux try: pip3 install cose and then python3 your_file.py
To install a library in python3 you need to use pip3. Otherwise remove the 3 from both commands.
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Install Binascii
You can use Binascii like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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