Tcl

X509Certificate GetCertHash SHA256

See more Certificates Examples

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

load ./chilkat.dll

set success 0

set cert [new_CkCert]

# 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..
set success [CkCert_LoadFromFile $cert "qa_data/certs/cert_test123.cer"]
if {$success != 1} then {
    puts [CkCert_lastErrorText $cert]
    delete_CkCert $cert
    exit
}

# Get the binary DER of the certificae, and compute the SHA256 hash:
set bdDer [new_CkBinData]

CkCert_ExportCertDerBd $cert $bdDer

# Get the base64 representation of the SHA256 hash.
set certHash [CkBinData_getHash $bdDer "sha256" "base64"]

puts "Certificate hash in base64 = $certHash"

delete_CkCert $cert
delete_CkBinData $bdDer