102 questions
0
votes
0
answers
8
views
Kotlinx Serialization: CBOR deserialization without deserialization strategy?
I would like to deserialize a generic cbor object using kotlinx-serialization, including tags etc., without knowing much about its structure. Basically an equivalent to a JsonObject, but for Cbor.
Is ...
- 1
0
votes
0
answers
19
views
Custom serializer for Jackson with togglebale options
I have a rather complicated Class structure that is needed to be serialized into CBOR. Now issue is that sometimes i need CBOR with tags while other times i need without tags.
Id like to be able to ...
- 1,524
1
vote
1
answer
72
views
What options should I pass to node-cbor to decode WebAuthN passkey authenticatorData?
To decode the AuthenticatorAttestationResponse: attestationObject property returned when attestationType: 'direct' is passed to .create(), this works:
const {decodeAllSync} = require("cbor");...
- 739
0
votes
0
answers
31
views
Usage of CBOR tag 27 (major type 6)
As per specification supplied with the tag registration, one supposed to use a string as type identifier. However, the specification seems to allow a great degree of freedom wrt how to use the tag.
...
0
votes
1
answer
147
views
Converting a valid cbor string to cbor bytes
how do i convert a valid cbor that is in string to bytes?
cbor = "b'\xa1bip\x186'"
Using bytes or the usual stuff isnt working e.g .encode('utf-8')
I want to be able to use loads on the data
...
- 1
0
votes
1
answer
114
views
cbor.js decodes BYTES to associative object instead of Array/TypedArray
I have a CBOR payload containing a MAP with a BYTES field:
// simplified testcase:
var data = [0xBF, 0x63, 0x72, 0x61, 0x77, 0x58, 0x10, 0x00,
0xFF, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0xFF, ...
- 18.9k
1
vote
0
answers
82
views
Avoid extra allocations while encoding data as CBOR, using kotlinx.serialization
When using kotlinx.serialization and encoding data as JSON, it's possible to write serialized data directly into an OutputStream, via Json.encodeToStream(SerializationStrategy<T>, T, ...
- 5,268
0
votes
0
answers
62
views
How to use lenient mode with FasterXML CBOR?
I want to use the CBORGenerator.Feature.LENIENT_UTF_ENCODING enum that was introduced in version 2.12 of the jackson-dataformats-binary library. I am using version 2.16.0 of the library.
I thought I ...
- 4,680
0
votes
0
answers
150
views
How can I decode CBOR-encoded data that uses CBOR byte strings in Java?
I am sending CBOR-encoded data from one application to another. The application receiving the CBOR-encoded data is a Java application. The CBOR-encoded data was encoded with strings as byte strings, i....
- 4,680
0
votes
1
answer
867
views
CBOR decode the attestationObject
I'm trying to implement webauthn and getting tripped up at the CBOR decoding part. The webauthn method returns a byte array which has to be CBOR decoded to get a json object. Since I have to send this ...
- 2,220
1
vote
0
answers
171
views
RawCborDecodeError when saving metadata in Cardano using Blockfrost Api
I am trying to save metadata on Cardano using Blockfrost API, but I keep getting 400 error:
{
"error": "Bad Request",
"message": '"transaction ...
- 177
-1
votes
1
answer
143
views
How to decode cbor encoded hex string using perl libraries?
I have a cbor encoded hex string.
when decoding using CBOR::XS
But I am getting an error as
garbage after CBOR object, at offset 2 (octet 0x41) at new.pl line 6.
use CBOR::XS;
# Replace this with your ...
- 23
1
vote
1
answer
552
views
CBOR serialization and deserialization on different platforms
I write a client-server application where the server is a Linux machine, and the client is a Windows machine. I serialize data using CBOR before sending them over a network.
I serialized data on the ...
- 121
1
vote
2
answers
779
views
How can the public key created by webauthn be decoded?
I have created a key pair using a webauthn playground, and the public key it generates is:
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA12_SHooAcAenEEhUaGH7woTdHC7sFYx9AjDbZWE3a6DakqFUFF6F7-AT-...
1
vote
0
answers
156
views
libcbor and nested structure
I have a JSON nested structure like this:
{"var1":"val1","var2":{"var1a":"val1a"}}
I have generated the cbor buffer using this function from the ...
- 47
0
votes
1
answer
434
views
Python cbor2 encode float in preferred (efficient) format
The CBOR docs state that the most efficient (less number of bytes) encoding should be preferred.
floats can be encoded as 64-bit floats, or with extensions as 32-bit, 16-bit, BigFloat or DecimalFloat ...
- 43
0
votes
0
answers
95
views
SenML parser for C# .net
I am looking for a viable solution to parse SenML data into JSON using C#.NET.
Preferably the following types -
application/senml+json
application/senml+cbor
I have seen packages in Python namely - ...
0
votes
1
answer
2k
views
Question about JSON vs CBOR serialization
I have a theorical doubt about how serialization works, and especially about the difference between serialization schemes like JSON and binary serialization schemes like CBOR.
My question is: if a ...
- 97
0
votes
1
answer
70
views
Nested maps in Qt's QCborStreamWriter?
My program provides a large amount of data, organized in nested maps, that I would like to serialize and write in a file. Originally, I used a QJsonDocument with QJsonMap's and QJsonArray's, but the ...
-1
votes
1
answer
983
views
decode hex encoded cbor string as a string in javascript
I have this hex encoded cbor string that I need decoded as a string: ...
- 11
0
votes
1
answer
129
views
How CBOR Parse Task in Standard mode works?
I wonder how cborparse in mode="standard" works cause I can't make it work.
Resources
Chainlink CBOR Parse Task - docs
Chainlink CBOR Prase Task - implementation
Chainlink CBOR Parse Task - ...
- 11
1
vote
0
answers
279
views
Opensearch: Insert documents (Fast) with CBOR and Bulking
I have to insert a lot of documents as fast as possible to an Opensearch Server (2.1.0) from a python client.
I am already using the Bulking API and considering using the CBOR format instead of plain ...
- 11
0
votes
0
answers
70
views
Unambiguity of CBOR Diagnostic Notation: RFC8610, Appendix G.3
RFC 8610, appendix G.3 states the following:
Where a byte string is to carry an embedded CBOR-encoded item, or
more generally a sequence of zero or more such items, the diagnostic
notation for these ...
- 121
1
vote
1
answer
275
views
cbor encoding dictionary with int key(s) turn to string key(s) on the server side
# client side code:
import {encode, decode} from "cbor-js"
const data = {1: 1, 2: 2, 3: :3}
const encoding = encode(data)
after sending the encoded data into the server (python) and ...
- 2,717
-1
votes
1
answer
146
views
The CBOR library for Delphi is returning a different answer than Nodejs
We are decoding a QR code and receive an unexpected (incorrect) answer from the Delphi library. the Nodejs is the expected response.
Delphi result at map position 192 text converted to Ascii
101,110,...
- 72
0
votes
0
answers
2k
views
Elasticsearch indexing error - field [data] not present as part of path [data]
I get this error: field [data] not present as part of path [data] when I attempt to ingest an attachment encoded in CBOR, in ElasticSearch 7.16. Using the ingest-attachment plugin. Files are large, so ...
- 1,524
2
votes
1
answer
3k
views
cbor2 encoding bytes using Python
I'm decoding bytes using cbor2 library but I want to reverse the process to encoding
This is my code
import cbor2
cbor_data_decoded = cbor2.loads(b'\xd2\x84M\xa2\x01&\x04H\x0e\x1b)\x96VcIV\xa0Y\...
- 21
1
vote
1
answer
362
views
Implementing Typed Arrays with cbor2
Is it possible to implement Typed Arrays using the cbor2 Python library? In the documentation I only saw that you can define a custom encoder to serialize custom objects, but instead I would like to ...
- 97
1
vote
0
answers
169
views
Exception in thread "main" java.lang.NoClassDefFoundError: com/upokecenter/cbor/CBORObject
I'm trying to decode a QR code and I'm getting this runtime error while running this line
Message a = Encrypt0Message.DecodeFromBytes(outputStream.toByteArray());:
Exception in thread "main" ...
0
votes
0
answers
400
views
Base45 encoding
I recently have taken up interest in qr codes and first learned of base45 encoding and CBOR. I have a code snippet below, what I am wondering is if there is a way to actually reverse so that you could ...
- 1,044
5
votes
1
answer
1k
views
From base64-encoded public key in DER format to COSE key, in Python
I have a base64-encoded public key in DER format.
In Python, how can I convert it into a COSE key?
Here is my failed attempt:
from base64 import b64decode
from cose.keys import CoseKey
pubkeyder = &...
- 1,733
1
vote
1
answer
759
views
Decoding covid TESTING certificate in Python - invalid base45 string
Thank you for your help.
With the following sample script, I can successfully decode a (a) covid VACCINATION bar code and pass on the json to my application (I've tested this with the bar codes in my &...
- 11
0
votes
1
answer
2k
views
CBOR encoding issue on format of keys
On javascript (not using node), I am facing different results when CBOR encoding using library (https://github.com/paroga/cbor-js) and when using CBOR online (https://cbor.me/). Note that even using a ...
- 135
-1
votes
1
answer
686
views
C++ jsoncons : cbor to json
I would like to convert cbor into json using the C++ jsoncons library (https://github.com/danielaparker/jsoncons/blob/master/doc/ref/cbor/cbor.md).
But when I print the result to console some entries ...
- 23
1
vote
0
answers
233
views
How to add a cbor.tag to a cose signature in cose-js
Does anyone with experience with cose-js know how to add a cbor tag to a cose signature? More specifically the tag "18" indicating that it is cose-sign1.
I am studying COSE for my computer ...
- 379
1
vote
1
answer
372
views
NameError: name 'cbor' is not defined
I used
cbor_payload = cbor.dumps(cert_payload)
This leads to the
NameError: name 'cbor' is not defined
message. (cbor was already installed via pip install before.)
Any hints?
- 21
0
votes
2
answers
2k
views
How to encode CBOR from the decoding buffer
Buffer is not returning the same when decoding then encoding then decoding of CBOR.
const greenpassData = cbor.decodeAllSync(cbor_data);
// --------------------------------
//Want the CBOR data after ...
- 1,358
1
vote
1
answer
954
views
How to deserialize/serialize struct as array without keys
How can I de/serialize struct without keys ? Since i will not be changing the order of fields, Indexes can act as keys which will reduce the size of payload.
I'm working with serde_json and ciborium ...
- 917
2
votes
2
answers
1k
views
Error trying to verify signature on CBOR message
I'm having problems decoding EU Digital Certificate ("Covid pass") using COSE-JAVA. Public key appears to load ok but when I try to validate the CBOR message, I get following error:
COSE....
- 822
0
votes
1
answer
87
views
library cbor introduces a new value in the conversion
I made on node.js, this program, which has an anomaly. When I do decodeAllSync I get a vector of decimal numbers
which has one fewer numbers than I get by reconverting the vector with encodeAsync. Why ...
- 445
0
votes
0
answers
199
views
CBOR encoding for a Double gives me wrong Output
I am using the CBORTree Library from Google right now, I am trying to encode a Double like this:
val cborData = CborObject.createFromJavaObject(129.33)
val cborBytes = cborData.toCborByteArray()
My ...
1
vote
0
answers
329
views
Getting the right CBOR output
I have a little code snippet, where I try to serialize a map, kind of a JSON object into a CBOR ByteArray. But I can not get the same output as in the CBOR playground cbor.me
The thing I want to ...
3
votes
1
answer
3k
views
Verify EU GreenPass with openSSL
I just received my Covid Green Pass. I've started to decode it, here are the fields I get:
header: a20448349a42b0c2d0728e0126
payload: ...
- 1,188
1
vote
1
answer
316
views
Why there are difference while coding CBOR in Python libraries and RIOT OS C library?
So I have this thing
{'apn': 'censored', 'support_data_mode': False, 'data_usr_name': 'censored', 'data_password': 'censored'}
When read this data from system that uses NanoCBOR i get something like ...
1
vote
1
answer
884
views
Retrieving data from CBOR ByteArray
I am trying to serialize a map into CBOR in Kotlin with the Jackson CBOR Dataformats Library, this works fine if the key is a String , I can retrieve the value of that key easily but when the key in ...
1
vote
1
answer
709
views
Verify COSE data (P-256)
I'm trying to verify the COSE data in the EU covid passports.
Verification works using https://github.com/panzi/verify-ehc, but this uses python libraries and I want to do it in JS. Verification ...
- 21k
1
vote
5
answers
5k
views
Convert QR decoding solution from Python to C# (EU DGC)
I am trying to convert this Python code to C# (.NET Core ideally).
Source
My goal is to convert the QR input string to another string containing the data in json. See the provided links.
#! /usr/bin/...
- 11
3
votes
2
answers
11k
views
Decode a base45 string that will lead to a cbor compressed file
Hi im trying to read my greenpass certificate, and i know that when you scan the QR code it will appear something like this HC1:NHFDFGDF......, i also know this is encoded as base45 so i made a little ...
- 31
6
votes
1
answer
11k
views
Webpack 5+Process is not defined triggered by stream-browserify
I have to decode a CBOR encoded array using the cbor node module.
When i launch my command:
const decodedData = base45.decode(greenpassBody);
const output = pako.inflate(decodedData);
const results = ...
1
vote
0
answers
394
views
Example code for using CBOR in Angular Frontend
has anybody some example code about how to decode CBOR messages in an Angular Frontend?
If I install 'cbor-web' via npm I get an exception during startup of the Angular Frontend:
Uncaught ...
- 95