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Subject[RFC 0/1] ima/evm: signature verification support using asymmetric keys
Asymmetric keys were introduced in linux-3.7 to verify the signature on signed
kernel modules. The asymmetric keys infrastructure abstracts the signature
verification from the crypto details. This patch adds IMA/EVM signature
verification using asymmetric keys. Support for additional signature
verification methods can now be delegated to the asymmetric key infrastructure.

Although the module signature header and the IMA/EVM signature header could
use the same header format, to minimize the signature length and save space
in the extended attribute, the IMA/EVM header format is different than the
module signature header. The main difference is that the key identifier is
a sha1[12 - 19] hash of the key modulus and exponent and similar to the current
implementation. The only purpose is to identify corresponding key in the kernel
keyring. ima-evm-utils was updated to support the new signature format.


Dmitry Kasatkin (1):
ima: digital signature verification using asymmetric keys

security/integrity/Kconfig | 12 +++++
security/integrity/digsig.c | 103 ++++++++++++++++++++++++++++++++++++++++++-
2 files changed, 114 insertions(+), 1 deletion(-)


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