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Generate a Hash of the Claim Set

Generate a Base64-encoded SHA-256 hash of these header fields:

Headers
Header Field	Description
iat	The date and time of the message origin. Date formatting is defined by RFC 7231, Section 7.1.1.1.
digest	A Base64 encoded hash of the message payload. The digest field is not included in a GET request.
digestAlgorithm	The algorithm used to hash the message payload. The message payload should be hashed using the SHA-256 algorithm. The digestAlgorithm field is not included in a GET request.

Follow these steps to generate the hash:

Generate the SHA-256 hash of the fields in JSON format.

Encode the hashed string to Base64.

Add the message body hash to the

digest

header field.

Creating a Message Hash Using Command Line Tools

Generate the SHA-256 hash using the

shasum

tool.

echo -n "{"iat":"Thur, 15 June 2017 08:12:31 GMT","digest":"tP7hDajF4f6q0ysBQCHgef5K/PBq8iMASvlEARp8tl=",
					"digestAlgorithm":"SHA-256"}" | shasum -a 256

Base64 Encoding a Message Hash Using Command Line Tools

Generate the SHA-256 hash using the

base64

tool.

echo -n "5995a4f27b4b9256a94cf54489a9ef691d8dc8a590d322780d3b202cfa2f078f" | base64

Add the message body hash to the

digest

header field

NTk5NWE0ZjI3YjRiOTI1NmE5NGNmNTQ0ODlhOWVmNjkxZDhkYzhhNTkwZDMyMjc4MGQzYjIwMmNmYTJmMDc4Zg==