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- #
- # Key management configuration
- #
- config KEYS
- bool "Enable access key retention support"
- help
- This option provides support for retaining authentication tokens and
- access keys in the kernel.
- It also includes provision of methods by which such keys might be
- associated with a process so that network filesystems, encryption
- support and the like can find them.
- Furthermore, a special type of key is available that acts as keyring:
- a searchable sequence of keys. Each process is equipped with access
- to five standard keyrings: UID-specific, GID-specific, session,
- process and thread.
- If you are unsure as to whether this is required, answer N.
- config TRUSTED_KEYS
- tristate "TRUSTED KEYS"
- depends on KEYS && TCG_TPM
- select CRYPTO
- select CRYPTO_HMAC
- select CRYPTO_SHA1
- help
- This option provides support for creating, sealing, and unsealing
- keys in the kernel. Trusted keys are random number symmetric keys,
- generated and RSA-sealed by the TPM. The TPM only unseals the keys,
- if the boot PCRs and other criteria match. Userspace will only ever
- see encrypted blobs.
- If you are unsure as to whether this is required, answer N.
- config ENCRYPTED_KEYS
- tristate "ENCRYPTED KEYS"
- depends on KEYS
- select CRYPTO
- select CRYPTO_HMAC
- select CRYPTO_AES
- select CRYPTO_CBC
- select CRYPTO_SHA256
- select CRYPTO_RNG
- help
- This option provides support for create/encrypting/decrypting keys
- in the kernel. Encrypted keys are kernel generated random numbers,
- which are encrypted/decrypted with a 'master' symmetric key. The
- 'master' key can be either a trusted-key or user-key type.
- Userspace only ever sees/stores encrypted blobs.
- If you are unsure as to whether this is required, answer N.
- config KEYS_DEBUG_PROC_KEYS
- bool "Enable the /proc/keys file by which keys may be viewed"
- depends on KEYS
- help
- This option turns on support for the /proc/keys file - through which
- can be listed all the keys on the system that are viewable by the
- reading process.
- The only keys included in the list are those that grant View
- permission to the reading process whether or not it possesses them.
- Note that LSM security checks are still performed, and may further
- filter out keys that the current process is not authorised to view.
- Only key attributes are listed here; key payloads are not included in
- the resulting table.
- If you are unsure as to whether this is required, answer N.
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