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Example generate signature #913

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Example generate signature #913

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13 changes: 9 additions & 4 deletions lib/stripe/webhook.rb
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Expand Up @@ -24,10 +24,14 @@ def self.construct_event(payload, sig_header, secret,
module Signature
EXPECTED_SCHEME = "v1"

def self.compute_signature(payload, secret)
# Compute a signature for a given payload, header and secret
def self.compute_signature(payload, header, secret)
timestamp, _signatures =
get_timestamp_and_signatures(header, EXPECTED_SCHEME)

signed_payload = "#{timestamp}.#{payload}"
OpenSSL::HMAC.hexdigest(OpenSSL::Digest.new("sha256"), secret, payload)
end
private_class_method :compute_signature

# Extracts the timestamp and the signature(s) with the desired scheme
# from the header
Expand Down Expand Up @@ -67,8 +71,8 @@ def self.verify_header(payload, header, secret, tolerance: nil)
)
end

signed_payload = "#{timestamp}.#{payload}"
expected_sig = compute_signature(signed_payload, secret)

expected_sig = compute_signature(payload, header, secret)
unless signatures.any? { |s| Util.secure_compare(expected_sig, s) }
raise SignatureVerificationError.new(
"No signatures found matching the expected signature for payload",
Expand All @@ -85,6 +89,7 @@ def self.verify_header(payload, header, secret, tolerance: nil)

true
end

end
end
end