Tcl

SSH HSM Public Key Authentication

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Demonstrates how to authenticate with an SSH server using public key authentication using an HSM (USB token or smartcard). Tcl

load ./chilkat.dll

set success 0

# This example assumes the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

# Note: Chilkat's PKCS11 implementation runs on Windows, Linux, MacOs, and other supported operating systems.

set pkcs11 [new_CkPkcs11]

# This would be a path to a .dylib on MacOS, or a path to a .so shared lib on Linux.
CkPkcs11_put_SharedLibPath $pkcs11 "C:/Program Files (x86)/Gemalto/IDGo 800 PKCS#11/IDPrimePKCS1164.dll"
set pin "0000"
set userType 1

# Establish a PKCS11 logged-on session using the driver (.so, .dylib, or .dll) as specified in the SharedLibPath above.
set success [CkPkcs11_QuickSession $pkcs11 $userType $pin]
if {$success == 0} then {
    puts [CkPkcs11_lastErrorText $pkcs11]
    delete_CkPkcs11 $pkcs11
    exit
}

# Set PKCS11 attributes to find our desired private key object.
set json [new_CkJsonObject]

CkJsonObject_UpdateString $json "class" "private_key"
CkJsonObject_UpdateString $json "label" "MySshKey"

# Get the PKCS11 handle to the private key located on the HSM.
set priv_handle [CkPkcs11_FindObject $pkcs11 $json]

# Get the PKCS11 handle to the corresponding public key located on the HSM.
CkJsonObject_UpdateString $json "class" "public_key"

set pub_handle [CkPkcs11_FindObject $pkcs11 $json]

set key [new_CkSshKey]

# The key type can be "rsa" or "ec"
set keyType "rsa"
set success [CkSshKey_UsePkcs11 $key $pkcs11 $priv_handle $pub_handle $keyType]
if {$success == 0} then {
    puts [CkSshKey_lastErrorText $key]
    delete_CkPkcs11 $pkcs11
    delete_CkJsonObject $json
    delete_CkSshKey $key
    exit
}

set ssh [new_CkSsh]

set success [CkSsh_Connect $ssh "example.com" 22]
if {$success != 1} then {
    puts [CkSsh_lastErrorText $ssh]
    delete_CkPkcs11 $pkcs11
    delete_CkJsonObject $json
    delete_CkSshKey $key
    delete_CkSsh $ssh
    exit
}

# Authenticate with the SSH server using the login and
# HSM private key.  (The corresponding public key should've 
# been installed on the SSH server beforehand.)
set success [CkSsh_AuthenticatePk $ssh "myLogin" $key]
if {$success != 1} then {
    puts [CkSsh_lastErrorText $ssh]
    delete_CkPkcs11 $pkcs11
    delete_CkJsonObject $json
    delete_CkSshKey $key
    delete_CkSsh $ssh
    exit
}

puts "Public-Key Authentication Successful!"

delete_CkPkcs11 $pkcs11
delete_CkJsonObject $json
delete_CkSshKey $key
delete_CkSsh $ssh