[PATCH v7 0/5] KEYS: asymmetric: tpm2_key_{rsa,ecdsa}

Jarkko Sakkinen
2024-05-28T21:08:28Z

Testing
=======

RSA
---

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

ECDSA
-----

tpm2_createprimary --hierarchy o -G ecc -c owner.txt
tpm2_evictcontrol -c owner.txt 0x81000001
openssl ecparam -name prime256v1 -genkey -noout -out private.pem
tpm2_import -C 0x81000001 -G ecc -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_sign $serial 0 plaintext.txt hash=sha256 > signed.dat
keyctl pkey_verify $serial 0 plaintext.txt signed.dat hash=sha256

Closed Issues
=============

* When verifying ECDSA signature, _ecdsa_verify() returns -EKEYREJECTED.
* v7: rewrote the signature encoder with a more structured layout.

References
==========

* v6: https://lore.kernel.org/linux-integrity/20240528035136.11464-1-jarkko@kernel.org/
* v5: https://lore.kernel.org/linux-integrity/20240523212515.4875-1-jarkko@kernel.org/
* v4: https://lore.kernel.org/linux-integrity/20240522005252.17841-1-jarkko@kernel.org/
* v3: https://lore.kernel.org/linux-integrity/20240521152659.26438-1-jarkko@kernel.org/
* v2: https://lore.kernel.org/linux-integrity/336755.1716327854@warthog.procyon.org.uk/
* v1: https://lore.kernel.org/linux-integrity/20240520184727.22038-1-jarkko@kernel.org/
* Derived from https://lore.kernel.org/all/20200518172704.29608-1-prestwoj@gmail.com/

Jarkko Sakkinen (5):
crypto: rsa-pkcs1pad: export rsa1_asn_lookup()
KEYS: trusted: Change -EINVAL to -E2BIG
crypto: tpm2_key: Introduce a TPM2 key type
keys: asymmetric: Add tpm2_key_rsa
keys: asymmetric: Add tpm2_key_ecdsa

crypto/Kconfig | 7 +
crypto/Makefile | 6 +
crypto/asymmetric_keys/Kconfig | 30 +
crypto/asymmetric_keys/Makefile | 2 +
crypto/asymmetric_keys/tpm2_key_ecdsa.c | 462 +++++++++++++++
crypto/asymmetric_keys/tpm2_key_rsa.c | 678 ++++++++++++++++++++++
crypto/ecdsa.c | 1 -
crypto/rsa-pkcs1pad.c | 16 +-
crypto/tpm2_key.asn1 | 11 +
crypto/tpm2_key.c | 134 +++++
drivers/char/tpm/tpm-buf.c | 2 +-
include/crypto/rsa-pkcs1pad.h | 20 +
include/crypto/tpm2_key.h | 46 ++
include/linux/tpm.h | 9 +
security/keys/trusted-keys/Kconfig | 2 +-
security/keys/trusted-keys/Makefile | 2 -
security/keys/trusted-keys/tpm2key.asn1 | 11 -
security/keys/trusted-keys/trusted_tpm2.c | 141 +----
18 files changed, 1447 insertions(+), 133 deletions(-)
create mode 100644 crypto/asymmetric_keys/tpm2_key_ecdsa.c
create mode 100644 crypto/asymmetric_keys/tpm2_key_rsa.c
create mode 100644 crypto/tpm2_key.asn1
create mode 100644 crypto/tpm2_key.c
create mode 100644 include/crypto/rsa-pkcs1pad.h
create mode 100644 include/crypto/tpm2_key.h
delete mode 100644 security/keys/trusted-keys/tpm2key.asn1

--
2.45.1