pkcsstats - Man Page
utility to display mechanism usage statistics for openCryptoki.
Displays mechanism usage statistics for openCryptoki. Usage statistics are collected by openCryptoki on a per user basis. For each user, mechanism usage is counted per configured slot and mechanism. For each mechanism a set of counters exist, one for each cryptographic strength of the cryptographic key used with the mechanism.
The available strengths are defined in the strength configuration file /etc/opencryptoki/strength.conf. Supported strengths are 112, 128, 192, and 256 representing the corresponding strength in bits. The strength configuration file defines how the strength is determined for the various key types. A strength of zero is used to count those mechanisms that do not use a key, or where the key strength is less than 112 bits.
Note: The strength does not specify the cryptographic strength of the mechanism, but the cryptographic strength of the key used with the mechanism (if any). For example, usage of mechanism CKM_SHA256 is reported under strength 0, because no key is used with this mechanism. However, usage of mechanism CKM_AES_CBC is reported under strength 128, 192, or 256, dependent on the cryptographic size of the AES key used with it (and the definitions in the strength configuration file).
Statistics collection is enabled by default. It can be disabled and configured in the openCryptoki configuration file /etc/opencryptoki/opencryptoki.conf. By default only explicit mechanism usage statistics from PKCS#11 applications are collected.
Optionally, implicit mechanism usage statistics can be collected, where additional mechanisms are specified in mechanism parameters. For example, RSA-PSS or RSA-OAEP allows to specify a hash mechanism and a mask generation function (MGF) in the mechanism parameter. ECDH allows to specify a key derivation function (KDF) in the mechanism parameter. The PBKDF2 mechanism allows to specify a pseudo random function (PRF) in the mechanism parameter.
Also optionally, opencryptoki-internal mechanism usage statistics can be collected. This collects usage statistics for crypto operations used internally for pin handling and encryption of private token objects in the data store.
Note: Implicit or internal mechanism usage can not be distinguished from explicit mechanism usage of PKCS#11 applications in the displayed statistics.
Statistics are collected in a POSIX shared memory segment per user. This shared memory segment contains all counters for all configured slots, mechanisms, and strengths. The shared memory segments are named var.lib.opencryptoki_stats_<uid>, where uid is the numeric user-id of the user the statistics belong to. The shared memory segments are automatically created for a user on the first attempt to collect statistics (when not already existent). The shared memory segments can be deleted using the pkcsstats command with the --delete, or --delete-all options.
The usage of a mechanism is counted once when the cryptographic operation is sucessfully initialized, i.e. during C_DigestInit, C_EncryptInit, C_DecryptInit, C_SignInit, C_SignRecoverInit, and C_VerifyInit. Multi-part operations involving the update functions like C_DigestUpdate, C_EncryptUpdate, C_DecryptUpdate, C_SignUpdate, and C_VerifyUpdate, are not counted additionally.
Other operations such as key generation, key derivation, key wrapping and unwrapping are counted during the respective functions like C_GenerateKey, C_GenerateKeyPair, C_DeriveKey, C_DeriveKey, C_UnwrapKey.
- -U, --user user-id
Specifies the user-id of the user to display, reset, or delete statistics for. If this option is omitted, the statistics of the current user are displayed, resetted, or deleted. Only the root user can display, reset, or delete statistics of other users.
- -S, --summary
Shows the accumulated statistics from all users. Only the root user can display the accumulated statistics from other users.
- -A, --all
Shows the statistics from all users. Only the root user can display statistics from all users.
- -a, --all-mechs
Shows the statistics for all mechanisms, also those with all-zero counters. If this option is omitted, only those mechanisms are displayed where at least one counter is non-zero.
- -s, --slot slot-id
Specifies the slot-id to display statistics for. If this option is omitted, the statistics for all configured slots are displayed.
- -r, --reset
Resets the statistics counters for the current user, or for the user specified with the --user option. Only the root user can reset the statistics from other users.
- -R, --reset-all
Resets the statistics counters for all users. Only the root user can reset the statistics from other users.
- -d, --delete
Deletes the shared memory segment containing the statistics counters for the current user, or for the user specified with the --user option. Only the root user can delete the statistics from other users.
- -D, --delete-all
Deletes the shared memory segment containing the statistics counters for all users. Only the root user can delete the statistics from other users.
- -j, --json
Shows the statistics in JSON format. This is usefull to get the statistics in a machine readable format.
- -h, --help
Displays help text and exits.