Convert a cisco PKCS12 (PEM/text format) to a binary P12 for OpenSSL

convert.ps1

#
# Opens up keypair.txt and writes to keypair.p12
#

# Skip the first and last lines, and trim any whitespace
$text = (Get-Content keypair.txt | Select-Object -skip 1 | Select-Object -skiplast 1).Trim()

# Convert from Base64 to Bytes
$bytes = [System.Convert]::FromBase64String($text)

# Write the content to keypair.p12
Set-Content keypair.p12 -Value $bytes -Encoding Byte