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REST API

Generating a Hash of the Token Header

Generate a Base64-encoded SHA-256 hash of these header fields:
kid
The ID of the key used to digitally sign the JWT.
alg
Algorithm used to sign the token header.
v-c-merchant-id
Merchant ID used in the request transaction.
Follow these steps to generate the hash:
  1. Generate the SHA-256 hash of the fields in JSON format.
  2. Encode the hashed string to Base64.

Example: Token Header Hash

NTc3N2RlOTAyZWEwNWU0NWM2YTBkNTI4Mjg0YTJmOTVlZGYxYWJlMzBjNzk5OTg1YzEzMjNiMDkzMzc0MWEwNA==

Code Example: Creating a Message Hash Using Command Line Tools

Generate the SHA-256 hash using the
shasum
 tool.
echo -n "{"kid":"cc34c0a0-bd5a-4a3c-a50d-a2a7db7643df",
"alg":"RS256","v-c-merchant-id":"merchant_id"}"
 | shasum -a 256
Base64-encode the hash value using the
base64
 tool.
echo -n "a9953cdca19433ae5ec1c4eb0dafd41df6de4d20cd47cbace3c316a1ac6d2008" | base64