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Update the ima_boot_aggregate apsects of the "README" and "help" files

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Add the missing "evmctl ima_boot_aggregate" info to the README.  Update
the "help" to include the new "--pcrs" option.  In addition, replace
the "file" option with "TPM 1.2 BIOS event log".  The new format is:

ima_boot_aggregate [--pcrs hash-algorithm,file] [TPM 1.2 BIOS event log]

Reminder: calculating the TPM PCRs based on the BIOS event log and
comparing them with the TPM PCRs should be done prior to calculating the
possible boot_aggregate value(s).

For TPM 1.2, the TPM 1.2 BIOS event log may be provided as an option
when calculating the ima_boot_aggregate.  For TPM 2.0, "tsseventextend
-sim -if <binary_bios_measurements> -ns -v", may be used to validate
the TPM 2.0 event log.

(Note: some TPM 2.0's export the BIOS event log in the TPM 1.2 format.)

Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
This commit is contained in:
Mimi Zohar 2020-07-29 17:25:25 -04:00
parent 62534f2127
commit fbd96c98c5
2 changed files with 2 additions and 1 deletions
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1
README
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@ -28,6 +28,7 @@ COMMANDS
import [--rsa] pubkey keyring
sign [-r] [--imahash | --imasig ] [--portable] [--key key] [--pass password] file
verify file
ima_boot_aggregate [--pcrs hash-algorithm,file] [TPM 1.2 BIOS event log]
ima_sign [--sigfile] [--key key] [--pass password] file
ima_verify file
ima_hash file

2
src/evmctl.c
View File

@ -2485,7 +2485,7 @@ struct command cmds[] = {
{"ima_setxattr", cmd_setxattr_ima, 0, "[--sigfile file]", "Set IMA signature from sigfile\n"},
{"ima_hash", cmd_hash_ima, 0, "file", "Make file content hash.\n"},
{"ima_measurement", cmd_ima_measurement, 0, "[--ignore-violations] [--verify-sig [--key key1, key2, ...]] [--pcrs [hash-algorithm,]file [--pcrs hash-algorithm,file] ...] file", "Verify measurement list (experimental).\n"},
{"ima_boot_aggregate", cmd_ima_bootaggr, 0, "[file]", "Calculate per TPM bank boot_aggregate digests\n"},
{"ima_boot_aggregate", cmd_ima_bootaggr, 0, "[--pcrs hash-algorithm,file] [TPM 1.2 BIOS event log]", "Calculate per TPM bank boot_aggregate digests\n"},
{"ima_fix", cmd_ima_fix, 0, "[-t fdsxm] path", "Recursively fix IMA/EVM xattrs in fix mode.\n"},
{"ima_clear", cmd_ima_clear, 0, "[-t fdsxm] path", "Recursively remove IMA/EVM xattrs.\n"},
{"sign_hash", cmd_sign_hash, 0, "[--key key] [--pass [password]", "Sign hashes from shaXsum output.\n"},