[PATCH 0/6] KEYS: asymmetric: tpm2_key_rsa

[Jarkko Sakkinen]

## Overview

Introduce tpm2_key_rsa implementing asymmetric TPM RSA key. This key type
can be enabled with CONFIG_ASYMMETRIC_TPM2_KEY_RSA_SUBTYPE config option.
Carves groundwork for similar modules in future, such as tpm2_key_ecdsa.

## Testing

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
serial=`cat key.priv.der | keyctl padd asymmetric tpm @u`
echo "abcdefg" > plaintext.txt
keyctl pkey_encrypt $serial 0 plaintext.txt enc=pkcs1 > encrypted.dat
keyctl pkey_decrypt $serial 0 encrypted.dat enc=pkcs1 > decrypted.dat
keyctl pkey_sign $serial 0 plaintext.txt enc=pkcs1 hash=sha256 > signed.dat
keyctl pkey_verify $serial 0 plaintext.txt signed.dat enc=pkcs1 hash=sha256

## References

- Derived from https://lore.kernel.org/all/20200518172704.29608-1-prestwoj@xxxxxxxxx/
- Last RFC: https://lore.kernel.org/linux-integrity/D1DMTJYL7TFC.3J3FM36K06ECD@xxxxxxxxxx/T/#t

James Prestwood (1):
  keys: asymmetric: ASYMMETRIC_TPM2_KEY_RSA_SUBTYPE

Jarkko Sakkinen (5):
  crypto: rsa-pkcs1pad: export rsa1_asn_lookup()
  lib: Expand asn1_encode_integer() to variable size integers
  tpm: Export tpm2_load_context()
  KEYS: trusted: Move tpm2_key_decode() to the TPM driver
  tpm: tpm2_key: Extend parser to TPM_LoadableKey

 crypto/asymmetric_keys/Kconfig                |  16 +
 crypto/asymmetric_keys/Makefile               |   1 +
 crypto/asymmetric_keys/tpm2_key_rsa.c         | 726 ++++++++++++++++++
 crypto/rsa-pkcs1pad.c                         |  16 +-
 drivers/char/tpm/Kconfig                      |   1 +
 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                   | 119 +++
 .../char/tpm}/tpm2key.asn1                    |   0
 include/crypto/rsa-pkcs1pad.h                 |  20 +
 include/crypto/tpm2_key.h                     |  35 +
 include/linux/asn1_encoder.h                  |   3 +-
 include/linux/tpm.h                           |   4 +
 lib/asn1_encoder.c                            | 185 ++---
 security/keys/trusted-keys/Makefile           |   2 -
 security/keys/trusted-keys/trusted_tpm2.c     | 130 +---
 18 files changed, 1138 insertions(+), 265 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