CyberSource / CyberSource/cybersource-rest-samples-php

Signature bug

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Dominant language
PHP
Stars
31
Forks
51
Avg merge
36m
Merged PRs (30d)
1

Description

Hi

I have been trying to get the "Cybersource" signature using the below codes but the response always says - "authentiaction failed!"
Can you please help me to solve this

/*Signature code/
$signatureString = "host: ".$request_host."\nrequest-target: ".$httpMethod." ".$resourcePath."\ndigest: SHA-256=".$digest."\nv-c-merchant-id: ".$merchant_id;
$signatureByteString = utf8_encode($signatureString);
$decodeKey = base64_decode($merchant_secret_key);
$signature = base64_encode(hash_hmac("sha256", $signatureByteString, $decodeKey, true));

Contributor guide

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the signature code in the issue and compare its host, request-target, digest, merchant ID, key decoding, and HMAC inputs against the CyberSource REST API authentication documentation. Done means identifying the signing mismatch and confirming that the request authenticates successfully; no repository file or test is mentioned.

Written by the indexing model from the issue text.

Assessment

Tech stack
php
Domain
api, payments
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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