NAME

stpm-exfiltrate - Extract key from TPM chip

SYNOPSIS

stpm-exfiltrate [ -hOps ] -k key file

DESCRIPTION

stpm-exfiltrate extracts a key that is otherwise protected by the TPM chip. This only works if the key is "migratable" (meaning it was generated in software), and the TPM owner password is known.

This is why you should generate keys in hardware (the default) with stpm-keygen and not use its -S option.

OPTIONS

-h

Show usage info.

-k key file

Key blob file to read.

-O

Use Well Known Secret for owner password. Default is ask.

-p

Ask for key PIN / password. Default is Well Known Secret.

-o

Ask for SRK PIN / password. Default is Well Known Secret.

EXAMPLES

stpm-exfiltrate -k ~/.simple-tpm-pk11/my.key
Enter owner password: blah blah
[ ... key data here ...]

stpm-exfiltrate -p -k ~/.simple-tpm-pk11/my.key
Enter owner password: blah blah
Enter key PIN: my secret password here
[ ... key data here ...]

stpm-exfiltrate -sp -k ~/.simple-tpm-pk11/my.key
Enter owner password: blah blah
Enter key PIN: my secret password here
Enter SRK PIN: 12345678
[ ... key data here ...]

DIAGNOSTICS

Most errors will probably be related to interacting with the TPM chip. Resetting the TPM chip and taking ownership should take care of most of them. See the TPM-TROUBLESHOOTING section of simple-tpm-pk11(7).

SEE ALSO

simple-tpm-pk11(7), stpm-sign(1), stpm-keygen.

AUTHOR

Simple-TPM-PK11 was written By Thomas Habets <habets@google.com> / <thomas@habets.se>.

git clone https://github.com/ThomasHabets/simple-tpm-pk11.git