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authorRoberto Sassu <roberto.sassu@huawei.com>2021-05-28 10:38:08 +0300
committerMimi Zohar <zohar@linux.ibm.com>2021-06-01 22:17:30 +0300
commitf8216f6b957f5657c5f4c97f4b037120c6f236bc (patch)
treece1daa6226b37167710857084645f6444d89b0ba /security/integrity
parent7dcfeacc5a9d0c130160b86de23279793a8732c8 (diff)
downloadlinux-f8216f6b957f5657c5f4c97f4b037120c6f236bc.tar.xz
ima: Define new template field imode
This patch defines the new template field imode, which includes the inode mode. It can be used by a remote verifier to verify the EVM portable signature, if it was included with the template fields sig or evmsig. Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com> Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
Diffstat (limited to 'security/integrity')
-rw-r--r--security/integrity/ima/ima_template.c2
-rw-r--r--security/integrity/ima/ima_template_lib.c22
-rw-r--r--security/integrity/ima/ima_template_lib.h2
3 files changed, 26 insertions, 0 deletions
diff --git a/security/integrity/ima/ima_template.c b/security/integrity/ima/ima_template.c
index a5ecd9e2581b..43784f2bf8bd 100644
--- a/security/integrity/ima/ima_template.c
+++ b/security/integrity/ima/ima_template.c
@@ -51,6 +51,8 @@ static const struct ima_template_field supported_fields[] = {
.field_show = ima_show_template_uint},
{.field_id = "igid", .field_init = ima_eventinodegid_init,
.field_show = ima_show_template_uint},
+ {.field_id = "imode", .field_init = ima_eventinodemode_init,
+ .field_show = ima_show_template_uint},
};
/*
diff --git a/security/integrity/ima/ima_template_lib.c b/security/integrity/ima/ima_template_lib.c
index 87b40f391739..3156fb34b1af 100644
--- a/security/integrity/ima/ima_template_lib.c
+++ b/security/integrity/ima/ima_template_lib.c
@@ -596,3 +596,25 @@ int ima_eventinodegid_init(struct ima_event_data *event_data,
{
return ima_eventinodedac_init_common(event_data, field_data, false);
}
+
+/*
+ * ima_eventinodemode_init - include the inode mode as part of the template
+ * data
+ */
+int ima_eventinodemode_init(struct ima_event_data *event_data,
+ struct ima_field_data *field_data)
+{
+ struct inode *inode;
+ umode_t mode;
+
+ if (!event_data->file)
+ return 0;
+
+ inode = file_inode(event_data->file);
+ mode = inode->i_mode;
+ if (ima_canonical_fmt)
+ mode = cpu_to_le16(mode);
+
+ return ima_write_template_field_data((char *)&mode, sizeof(mode),
+ DATA_FMT_UINT, field_data);
+}
diff --git a/security/integrity/ima/ima_template_lib.h b/security/integrity/ima/ima_template_lib.h
index b0aaf109f386..6509af4a97ee 100644
--- a/security/integrity/ima/ima_template_lib.h
+++ b/security/integrity/ima/ima_template_lib.h
@@ -54,4 +54,6 @@ int ima_eventinodeuid_init(struct ima_event_data *event_data,
struct ima_field_data *field_data);
int ima_eventinodegid_init(struct ima_event_data *event_data,
struct ima_field_data *field_data);
+int ima_eventinodemode_init(struct ima_event_data *event_data,
+ struct ima_field_data *field_data);
#endif /* __LINUX_IMA_TEMPLATE_LIB_H */