• Mimi Zohar's avatar
    integrity: IMA as an integrity service provider · 3323eec9
    Mimi Zohar authored
    IMA provides hardware (TPM) based measurement and attestation for
    file measurements. As the Trusted Computing (TPM) model requires,
    IMA measures all files before they are accessed in any way (on the
    integrity_bprm_check, integrity_path_check and integrity_file_mmap
    hooks), and commits the measurements to the TPM. Once added to the
    TPM, measurements can not be removed.
    
    In addition, IMA maintains a list of these file measurements, which
    can be used to validate the aggregate value stored in the TPM.  The
    TPM can sign these measurements, and thus the system can prove, to
    itself and to a third party, the system's integrity in a way that
    cannot be circumvented by malicious or compromised software.
    
    - alloc ima_template_entry before calling ima_store_template()
    - log ima_add_boot_aggregate() failure
    - removed unused IMA_TEMPLATE_NAME_LEN
    - replaced hard coded string length with #define name
    Signed-off-by: default avatarMimi Zohar <zohar@us.ibm.com>
    Signed-off-by: default avatarJames Morris <jmorris@namei.org>
    3323eec9
ima_api.c 5.55 KB