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Command-line implementation of Symantec's "VIP Access" token application on OSX. This will read from the same secret key and produce the same time-based one-time-passwords as the GUI application, but with output that can be captured and used in scripts. This can be useful for things like automating two-factor AnyConnect VPN logins through openco…
#!/usr/bin/expect -f
#
# VIPAccess.exp
#
# Command-line emulation of Symantec's VIP Access software token.
# Usage:
# ./VIPAccess.exp [v]
# If the "v" argument (or any argument) is specified, verbose output
# will be produced on stderr. The OTP value will be output on stdout.
#
set timeout 10
log_user 0
set aes_key D0D0D0E0D0D0DFDFDF2C34323937D7AE
set keychain /Users/$env(USER)/Library/Keychains/VIPAccess.keychain
proc vlog { s } { if $::argc { puts stderr $s } }
vlog "Finding machine serial number (used by VIPAccess to secure the keychain.):"
spawn /bin/sh -c "ioreg -rac IOPlatformExpertDevice | xpath 'plist/array/dict/key\[.=\"IOPlatformSerialNumber\"\]/following-sibling::*\[position()=1\]/text()' 2>/dev/null"
expect eof
set serial $expect_out(buffer)
vlog " $serial"
vlog "Reading encrypted Credential ID and OTP secret key from $keychain:"
spawn security unlock-keychain $keychain
expect "password to unlock $keychain: "
send "${serial}SymantecVIPAccess$env(USER)\n"
expect eof
spawn security find-generic-password -gl CredentialStore $keychain
expect -re \"acct\"<blob>=\"\(\[a-zA-Z0-9/+\]+=\)\"
set id_crypt $expect_out(1,string)
vlog " $id_crypt"
expect -re password:\ \"\(\[a-zA-Z0-9/+\]+=\)\"
set key_crypt $expect_out(1,string)
vlog " $key_crypt"
vlog "Decrypting Credential ID and OTP key:"
spawn /bin/sh -c "openssl enc -aes-128-cbc -d -K $aes_key -iv 0 -a <<< '$id_crypt'"
expect -re \(.*\)Symantec
set id_plain $expect_out(1,string)
vlog " $id_plain"
spawn /bin/sh -c "openssl enc -aes-128-cbc -d -K $aes_key -iv 0 -a <<< '$key_crypt' | xxd -p"
expect -re \[0-9a-f\]+
set key_plain $expect_out(0,string)
vlog " $key_plain"
vlog "Generating current OTP using secret key."
spawn oathtool --totp $key_plain
expect -re \\d+
set otp $expect_out(0,string)
puts $otp
@p120ph37
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p120ph37 commented Mar 15, 2021

@aselvan, your issue isn't that the password is wrong, it's that since OSX 10.12, there is an additional layer of access-control on keychains, in addition to the unlock mechanism. The first time this script tries to access your VIPAccess.keychain, OSX will pop up a prompt window asking (again) for the keychain password. If you paste the password there, and hit "Always Allow", that prompt will not reappear on subsequent runs of this script. (note: the same applies to the shell variant of this script that @ykhemani created).

You can echo the password to your terminal with this command if you like (for easy copy+paste into that popup dialog):

serial=$(ioreg -rac IOPlatformExpertDevice | xpath 'plist/array/dict/key[.="IOPlatformSerialNumber"]/following-sibling::*[position()=1]/text()' 2>/dev/null)
echo ${serial}SymantecVIPAccess${USER}

You can read a little bit about this additional authorization mechanism here: https://mostlikelee.com/blog-1/2017/9/16/scripting-the-macos-keychain-partition-ids

After reading the above article, you might think you can apply the "Always Allow" action directly from the terminal by doing this (but it won't work):

keychain=/Users/${USER}/Library/Keychains/VIPAccess.keychain
security set-generic-password-partition-list -S teamid:9PTGMPNXZ2,apple-tool: -k "${serial}SymantecVIPAccess${USER}" $keychain

It won't work because OSX now checks not only the partition-id but also the application-name of the accessing application, and there is currently no security subcommand to add application authorizations to an existing keychain entry. So long story short, the simplest way to do this is to just paste the password into the popup and hit "Always Allow". Or use @cyrozap's Python app instead of the Symantec app entirely: https://github.com/cyrozap/python-vipaccess

@aselvan
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aselvan commented Mar 16, 2021

@p120ph37,
Update: Please ignore my response earlier on password not working. I missed reading your note about the second time prompt. I got past that step and retrieved the secret key which is really what I am after. I have written a script that I use which is a wrapper on top of oathtool for all my other 2F needs so all I needed was the SymantecVIP secret key to generate TOTP. I am good now, thanks again.

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