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ima: extend the measurement list to include the file signature

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This patch defines a new template called 'ima-sig', which includes
the file signature in the template data, in addition to the file's
digest and pathname.

A template is composed of a set of fields.  Associated with each
field is an initialization and display function.  This patch defines
a new template field called 'sig', the initialization function
ima_eventsig_init(), and the display function ima_show_template_sig().

This patch modifies the .field_init() function definition to include
the 'security.ima' extended attribute and length.

Changelog:
- remove unused code (Dmitry Kasatkin)
- avoid calling ima_write_template_field_data() unnecesarily (Roberto Sassu)
- rename DATA_FMT_SIG to DATA_FMT_HEX
- cleanup ima_eventsig_init() based on Roberto's comments

Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
Signed-off-by: Dmitry Kasatkin <d.kasatkin@samsung.com>
Signed-off-by: Roberto Sassu <roberto.sassu@polito.it>
This commit is contained in:
Mimi Zohar
2013-07-23 11:15:00 -04:00
parent 42a20ba5c9
commit bcbc9b0cf6
8 changed files with 73 additions and 12 deletions
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10
security/integrity/ima/ima.h
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@@ -59,7 +59,8 @@ struct ima_template_field {
const char field_id[IMA_TEMPLATE_FIELD_ID_MAX_LEN];
int (*field_init) (struct integrity_iint_cache *iint, struct file *file,
const unsigned char *filename,
struct ima_field_data *field_data);
struct evm_ima_xattr_data *xattr_value,
int xattr_len, struct ima_field_data *field_data);
void (*field_show) (struct seq_file *m, enum ima_show_type show,
struct ima_field_data *field_data);
};
@@ -134,12 +135,15 @@ int ima_collect_measurement(struct integrity_iint_cache *iint,
struct evm_ima_xattr_data **xattr_value,
int *xattr_len);
void ima_store_measurement(struct integrity_iint_cache *iint, struct file *file,
const unsigned char *filename);
const unsigned char *filename,
struct evm_ima_xattr_data *xattr_value,
int xattr_len);
void ima_audit_measurement(struct integrity_iint_cache *iint,
const unsigned char *filename);
int ima_alloc_init_template(struct integrity_iint_cache *iint,
struct file *file, const unsigned char *filename,
struct ima_template_entry **entry);
struct evm_ima_xattr_data *xattr_value,
int xattr_len, struct ima_template_entry **entry);
int ima_store_template(struct ima_template_entry *entry, int violation,
struct inode *inode, const unsigned char *filename);
const char *ima_d_path(struct path *path, char **pathbuf);