Lua

X509Certificate GetCertHash SHA256

See more Certificates Examples

Shows how to get the SHA256 hash of a certificate. Lua

local chilkat = require("chilkat")

local cert = chilkat.Cert.new()

-- Load a certificate object with a certificate.
-- The certificate object could have come from any source,
-- or perhaps was obtained from another Chilkat function.
-- The source does not matter.  What matters is that we have
-- a cert object loaded with the certificate..
local success = cert:load_from_file("qa_data/certs/cert_test123.cer")
if not success then
    print(cert.last_error_text)
    return
end

-- Get the binary DER of the certificae, and compute the SHA256 hash:
local bdDer = chilkat.BinData.new()
cert:export_cert_der_bd(bdDer)

-- Get the base64 representation of the SHA256 hash.
local certHash = bdDer:get_hash("sha256", "base64")

print("Certificate hash in base64 = " .. certHash)