linux-kernel - [PATCH RFC v2 0/5] Asymmetric TPM2 key type

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Date: Sun, 19 May 2024 03:25:35 +0300
From: Jarkko Sakkinen <jarkko@...nel.org>
To: Herbert Xu <herbert@...dor.apana.org.au>
Cc: linux-integrity@...r.kernel.org,
	keyrings@...r.kernel.org,
	Andreas.Fuchs@...ineon.com,
	James Prestwood <prestwoj@...il.com>,
	David Woodhouse <dwmw2@...radead.org>,
	Jarkko Sakkinen <jarkko@...nel.org>,
	David Howells <dhowells@...hat.com>,
	"David S. Miller" <davem@...emloft.net>,
	Peter Huewe <peterhuewe@....de>,
	Jason Gunthorpe <jgg@...pe.ca>,
	James Bottomley <James.Bottomley@...senPartnership.com>,
	Stefan Berger <stefanb@...ux.ibm.com>,
	Ard Biesheuvel <ardb@...nel.org>,
	Mario Limonciello <mario.limonciello@....com>,
	linux-crypto@...r.kernel.org (open list:CRYPTO API),
	linux-kernel@...r.kernel.org (open list)
Subject: [PATCH RFC v2 0/5] Asymmetric TPM2 key type

## Overview

Introduce tpm2_key_rsa implementing asymmetric TPM RSA key.

I submit this first as RFC as I could not execute the keyctl padd in the
following sequence (returns EBADF):

tpm2_createprimary --hierarchy o -G rsa2048 -c owner.txt
tpm2_evictcontrol -c owner.txt 0x81000001
tpm2_getcap handles-persistent
openssl genrsa -out private.pem 2048
tpm2_import -C 0x81000001 -G rsa -i private.pem -u key.pub -r key.priv
tpm2_encodeobject -C 0x81000001 -u key.pub -r key.priv -o key.priv.pem
openssl asn1parse -inform pem -in key.priv.pem -noout -out key.priv.der
key_serial=`cat key.priv.der | keyctl padd asymmetric tpm @u`

This is derived work from James Prestwoodâ€™s earlier work from 2020:
https://lore.kernel.org/all/20200518172704.29608-1-prestwoj@gmail.com/

## Change Log

v2:
Sorry for rush update. I noticed that not all changes were in the
commits. This version just fixes those compilation errors.

James Prestwood (1):
  keys: asymmetric: ASYMMETRIC_TPM2_KEY_RSA_SUBTYPE

Jarkko Sakkinen (4):
  crypto: rsa-pkcs1pad: export rsa1_asn_lookup()
  tpm: export tpm2_load_context()
  KEYS: trusted: Do not use WARN when encode fails
  KEYS: trusted: Migrate tpm2_key_{encode,decode}() to TPM driver

 crypto/asymmetric_keys/Kconfig                |  13 +
 crypto/asymmetric_keys/Makefile               |   1 +
 crypto/asymmetric_keys/tpm2_key_rsa.c         | 655 ++++++++++++++++++
 crypto/rsa-pkcs1pad.c                         |  16 +-
 drivers/char/tpm/Kconfig                      |   2 +
 drivers/char/tpm/Makefile                     |   5 +
 drivers/char/tpm/tpm.h                        |   2 -
 drivers/char/tpm/tpm2-cmd.c                   |  77 ++
 drivers/char/tpm/tpm2-space.c                 |  61 --
 drivers/char/tpm/tpm2_key.c                   | 192 +++++
 .../char/tpm}/tpm2key.asn1                    |   0
 include/crypto/rsa-pkcs1pad.h                 |  20 +
 include/crypto/tpm2_key.h                     |  36 +
 include/linux/tpm.h                           |   3 +
 security/keys/trusted-keys/Makefile           |   2 -
 security/keys/trusted-keys/trusted_tpm2.c     | 183 +----
 16 files changed, 1032 insertions(+), 236 deletions(-)
 create mode 100644 crypto/asymmetric_keys/tpm2_key_rsa.c
 create mode 100644 drivers/char/tpm/tpm2_key.c
 rename {security/keys/trusted-keys => drivers/char/tpm}/tpm2key.asn1 (100%)
 create mode 100644 include/crypto/rsa-pkcs1pad.h
 create mode 100644 include/crypto/tpm2_key.h

-- 
2.45.1