|KEYCTL_GET_SECURITY(3)||Linux Key Management Calls||KEYCTL_GET_SECURITY(3)|
#include <keyutils.h> long keyctl_get_security(key_serial_t key, char *buffer, size_t buflen); long keyctl_get_security_alloc(key_serial_t key, char **_buffer);
The caller must have view permission on a key to be able to get its security context.
buffer and buflen specify the buffer into which the string will be placed. If the buffer is too small, the full size of the string will be returned, and no copy will take place.
keyctl_get_security_alloc() is similar to keyctl_get_security() except that it allocates a buffer big enough to hold the string and copies the string into it. If successful, A pointer to the buffer is placed in *_buffer. The caller must free the buffer.
On success keyctl_get_security_alloc() returns the amount of data in the buffer, less the NUL terminator. On error, the value -1 will be returned and errno will have been set to an appropriate error.
- The key specified is invalid.
- The key specified has expired.
- The key specified had been revoked.
- The key exists, but is not viewable by the calling process.
|26 Feb 2010||Linux|