(Ruby) Find a Certificate by it's SHA-1 Thumbprint

Finds a certificate by it's SHA-1 hex thumbprint. Parts of this example are specific to Windows because it searches the Windows Current User certificate store.

Chilkat Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

certStore = Chilkat::CkCertStore.new()

thumbprint = "12c1dd8015f3f03f7b1fa619dc24e2493ca8b4b2"

# This part of the example is specific to Windows because it is opening the Windows Current-User certificate store.
bReadOnly = true
success = certStore.OpenCurrentUserStore(bReadOnly)
if (success != true)
    print certStore.lastErrorText() + "\n";
    exit
end

# Find the certificate with the desired thumbprint
# cert is a CkCert
cert = certStore.FindCertBySha1Thumbprint(thumbprint)
if (certStore.get_LastMethodSuccess() != true)
    print "Failed to find the certificate." + "\n";
    exit
end

print "Found: " + cert.subjectCN() + "\n";

# -------------------------------------------------------------------------------------
# Alternatively, one could load a certificate store object with certs from a PEM file,
# and do the same thing..
certStorePem = Chilkat::CkCertStore.new()

success = certStorePem.LoadPemFile("pemFiles/certificates.pem")
if (success != true)
    print certStorePem.lastErrorText() + "\n";
    exit
end

# cert is a CkCert
cert = certStorePem.FindCertBySha1Thumbprint(thumbprint)
if (certStorePem.get_LastMethodSuccess() != true)
    print "Failed to find the certificate." + "\n";
    exit
end

print "Found: " + cert.subjectCN() + "\n";