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-rw-r--r--security/integrity/digsig.c30
-rw-r--r--security/integrity/ima/Kconfig8
-rw-r--r--security/integrity/ima/ima.h7
-rw-r--r--security/integrity/ima/ima_api.c22
-rw-r--r--security/integrity/ima/ima_appraise.c11
-rw-r--r--security/integrity/ima/ima_crypto.c17
-rw-r--r--security/integrity/ima/ima_fs.c14
-rw-r--r--security/integrity/ima/ima_init.c3
-rw-r--r--security/integrity/ima/ima_template.c21
-rw-r--r--security/integrity/ima/ima_template_lib.c6
-rw-r--r--security/integrity/integrity.h7
11 files changed, 68 insertions, 78 deletions
diff --git a/security/integrity/digsig.c b/security/integrity/digsig.c
index 77ca965ab684..b4af4ebc5be2 100644
--- a/security/integrity/digsig.c
+++ b/security/integrity/digsig.c
@@ -13,9 +13,7 @@
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/err.h>
-#include <linux/sched.h>
#include <linux/rbtree.h>
-#include <linux/cred.h>
#include <linux/key-type.h>
#include <linux/digsig.h>
@@ -23,19 +21,11 @@
static struct key *keyring[INTEGRITY_KEYRING_MAX];
-#ifdef CONFIG_IMA_TRUSTED_KEYRING
-static const char *keyring_name[INTEGRITY_KEYRING_MAX] = {
- ".evm",
- ".module",
- ".ima",
-};
-#else
static const char *keyring_name[INTEGRITY_KEYRING_MAX] = {
"_evm",
"_module",
"_ima",
};
-#endif
int integrity_digsig_verify(const unsigned int id, const char *sig, int siglen,
const char *digest, int digestlen)
@@ -45,7 +35,7 @@ int integrity_digsig_verify(const unsigned int id, const char *sig, int siglen,
if (!keyring[id]) {
keyring[id] =
- request_key(&key_type_keyring, keyring_name[id], NULL);
+ request_key(&key_type_keyring, keyring_name[id], NULL);
if (IS_ERR(keyring[id])) {
int err = PTR_ERR(keyring[id]);
pr_err("no %s keyring: %d\n", keyring_name[id], err);
@@ -66,21 +56,3 @@ int integrity_digsig_verify(const unsigned int id, const char *sig, int siglen,
return -EOPNOTSUPP;
}
-
-int integrity_init_keyring(const unsigned int id)
-{
- const struct cred *cred = current_cred();
- const struct user_struct *user = cred->user;
-
- keyring[id] = keyring_alloc(keyring_name[id], KUIDT_INIT(0),
- KGIDT_INIT(0), cred,
- ((KEY_POS_ALL & ~KEY_POS_SETATTR) |
- KEY_USR_VIEW | KEY_USR_READ),
- KEY_ALLOC_NOT_IN_QUOTA, user->uid_keyring);
- if (!IS_ERR(keyring[id]))
- set_bit(KEY_FLAG_TRUSTED_ONLY, &keyring[id]->flags);
- else
- pr_info("Can't allocate %s keyring (%ld)\n",
- keyring_name[id], PTR_ERR(keyring[id]));
- return 0;
-}
diff --git a/security/integrity/ima/Kconfig b/security/integrity/ima/Kconfig
index dad8d4ca2437..81a27971d884 100644
--- a/security/integrity/ima/Kconfig
+++ b/security/integrity/ima/Kconfig
@@ -123,11 +123,3 @@ config IMA_APPRAISE
For more information on integrity appraisal refer to:
<http://linux-ima.sourceforge.net>
If unsure, say N.
-
-config IMA_TRUSTED_KEYRING
- bool "Require all keys on the _ima keyring be signed"
- depends on IMA_APPRAISE && SYSTEM_TRUSTED_KEYRING
- default y
- help
- This option requires that all keys added to the _ima
- keyring be signed by a key on the system trusted keyring.
diff --git a/security/integrity/ima/ima.h b/security/integrity/ima/ima.h
index bf03c6a16cc8..0356e1d437ca 100644
--- a/security/integrity/ima/ima.h
+++ b/security/integrity/ima/ima.h
@@ -26,7 +26,8 @@
#include "../integrity.h"
-enum ima_show_type { IMA_SHOW_BINARY, IMA_SHOW_ASCII };
+enum ima_show_type { IMA_SHOW_BINARY, IMA_SHOW_BINARY_NO_FIELD_LEN,
+ IMA_SHOW_ASCII };
enum tpm_pcrs { TPM_PCR0 = 0, TPM_PCR8 = 8 };
/* digest size for IMA, fits SHA1 or MD5 */
@@ -97,7 +98,8 @@ int ima_add_template_entry(struct ima_template_entry *entry, int violation,
const char *op, struct inode *inode,
const unsigned char *filename);
int ima_calc_file_hash(struct file *file, struct ima_digest_data *hash);
-int ima_calc_field_array_hash(struct ima_field_data *field_data, int num_fields,
+int ima_calc_field_array_hash(struct ima_field_data *field_data,
+ struct ima_template_desc *desc, int num_fields,
struct ima_digest_data *hash);
int __init ima_calc_boot_aggregate(struct ima_digest_data *hash);
void ima_add_violation(struct file *file, const unsigned char *filename,
@@ -146,6 +148,7 @@ int ima_alloc_init_template(struct integrity_iint_cache *iint,
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);
+void ima_free_template_entry(struct ima_template_entry *entry);
const char *ima_d_path(struct path *path, char **pathbuf);
/* rbtree tree calls to lookup, insert, delete
diff --git a/security/integrity/ima/ima_api.c b/security/integrity/ima/ima_api.c
index 0e7540863fc2..c38bbce8c6a6 100644
--- a/security/integrity/ima/ima_api.c
+++ b/security/integrity/ima/ima_api.c
@@ -22,6 +22,19 @@
#include "ima.h"
/*
+ * ima_free_template_entry - free an existing template entry
+ */
+void ima_free_template_entry(struct ima_template_entry *entry)
+{
+ int i;
+
+ for (i = 0; i < entry->template_desc->num_fields; i++)
+ kfree(entry->template_data[i].data);
+
+ kfree(entry);
+}
+
+/*
* ima_alloc_init_template - create and initialize a new template entry
*/
int ima_alloc_init_template(struct integrity_iint_cache *iint,
@@ -37,6 +50,7 @@ int ima_alloc_init_template(struct integrity_iint_cache *iint,
if (!*entry)
return -ENOMEM;
+ (*entry)->template_desc = template_desc;
for (i = 0; i < template_desc->num_fields; i++) {
struct ima_template_field *field = template_desc->fields[i];
u32 len;
@@ -51,10 +65,9 @@ int ima_alloc_init_template(struct integrity_iint_cache *iint,
(*entry)->template_data_len += sizeof(len);
(*entry)->template_data_len += len;
}
- (*entry)->template_desc = template_desc;
return 0;
out:
- kfree(*entry);
+ ima_free_template_entry(*entry);
*entry = NULL;
return result;
}
@@ -94,6 +107,7 @@ int ima_store_template(struct ima_template_entry *entry,
/* this function uses default algo */
hash.hdr.algo = HASH_ALGO_SHA1;
result = ima_calc_field_array_hash(&entry->template_data[0],
+ entry->template_desc,
num_fields, &hash.hdr);
if (result < 0) {
integrity_audit_msg(AUDIT_INTEGRITY_PCR, inode,
@@ -133,7 +147,7 @@ void ima_add_violation(struct file *file, const unsigned char *filename,
}
result = ima_store_template(entry, violation, inode, filename);
if (result < 0)
- kfree(entry);
+ ima_free_template_entry(entry);
err_out:
integrity_audit_msg(AUDIT_INTEGRITY_PCR, inode, filename,
op, cause, result, 0);
@@ -268,7 +282,7 @@ void ima_store_measurement(struct integrity_iint_cache *iint,
if (!result || result == -EEXIST)
iint->flags |= IMA_MEASURED;
if (result < 0)
- kfree(entry);
+ ima_free_template_entry(entry);
}
void ima_audit_measurement(struct integrity_iint_cache *iint,
diff --git a/security/integrity/ima/ima_appraise.c b/security/integrity/ima/ima_appraise.c
index 46353ee517f6..734e9468aca0 100644
--- a/security/integrity/ima/ima_appraise.c
+++ b/security/integrity/ima/ima_appraise.c
@@ -381,14 +381,3 @@ int ima_inode_removexattr(struct dentry *dentry, const char *xattr_name)
}
return result;
}
-
-#ifdef CONFIG_IMA_TRUSTED_KEYRING
-static int __init init_ima_keyring(void)
-{
- int ret;
-
- ret = integrity_init_keyring(INTEGRITY_KEYRING_IMA);
- return 0;
-}
-late_initcall(init_ima_keyring);
-#endif
diff --git a/security/integrity/ima/ima_crypto.c b/security/integrity/ima/ima_crypto.c
index 676e0292dfec..fdf60def52e9 100644
--- a/security/integrity/ima/ima_crypto.c
+++ b/security/integrity/ima/ima_crypto.c
@@ -140,6 +140,7 @@ int ima_calc_file_hash(struct file *file, struct ima_digest_data *hash)
* Calculate the hash of template data
*/
static int ima_calc_field_array_hash_tfm(struct ima_field_data *field_data,
+ struct ima_template_desc *td,
int num_fields,
struct ima_digest_data *hash,
struct crypto_shash *tfm)
@@ -160,9 +161,13 @@ static int ima_calc_field_array_hash_tfm(struct ima_field_data *field_data,
return rc;
for (i = 0; i < num_fields; i++) {
- rc = crypto_shash_update(&desc.shash,
- (const u8 *) &field_data[i].len,
- sizeof(field_data[i].len));
+ if (strcmp(td->name, IMA_TEMPLATE_IMA_NAME) != 0) {
+ rc = crypto_shash_update(&desc.shash,
+ (const u8 *) &field_data[i].len,
+ sizeof(field_data[i].len));
+ if (rc)
+ break;
+ }
rc = crypto_shash_update(&desc.shash, field_data[i].data,
field_data[i].len);
if (rc)
@@ -175,7 +180,8 @@ static int ima_calc_field_array_hash_tfm(struct ima_field_data *field_data,
return rc;
}
-int ima_calc_field_array_hash(struct ima_field_data *field_data, int num_fields,
+int ima_calc_field_array_hash(struct ima_field_data *field_data,
+ struct ima_template_desc *desc, int num_fields,
struct ima_digest_data *hash)
{
struct crypto_shash *tfm;
@@ -185,7 +191,8 @@ int ima_calc_field_array_hash(struct ima_field_data *field_data, int num_fields,
if (IS_ERR(tfm))
return PTR_ERR(tfm);
- rc = ima_calc_field_array_hash_tfm(field_data, num_fields, hash, tfm);
+ rc = ima_calc_field_array_hash_tfm(field_data, desc, num_fields,
+ hash, tfm);
ima_free_tfm(tfm);
diff --git a/security/integrity/ima/ima_fs.c b/security/integrity/ima/ima_fs.c
index d47a7c86a21d..db01125926bd 100644
--- a/security/integrity/ima/ima_fs.c
+++ b/security/integrity/ima/ima_fs.c
@@ -120,6 +120,7 @@ static int ima_measurements_show(struct seq_file *m, void *v)
struct ima_template_entry *e;
int namelen;
u32 pcr = CONFIG_IMA_MEASURE_PCR_IDX;
+ bool is_ima_template = false;
int i;
/* get entry */
@@ -145,14 +146,21 @@ static int ima_measurements_show(struct seq_file *m, void *v)
ima_putc(m, e->template_desc->name, namelen);
/* 5th: template length (except for 'ima' template) */
- if (strcmp(e->template_desc->name, IMA_TEMPLATE_IMA_NAME) != 0)
+ if (strcmp(e->template_desc->name, IMA_TEMPLATE_IMA_NAME) == 0)
+ is_ima_template = true;
+
+ if (!is_ima_template)
ima_putc(m, &e->template_data_len,
sizeof(e->template_data_len));
/* 6th: template specific data */
for (i = 0; i < e->template_desc->num_fields; i++) {
- e->template_desc->fields[i]->field_show(m, IMA_SHOW_BINARY,
- &e->template_data[i]);
+ enum ima_show_type show = IMA_SHOW_BINARY;
+ struct ima_template_field *field = e->template_desc->fields[i];
+
+ if (is_ima_template && strcmp(field->field_id, "d") == 0)
+ show = IMA_SHOW_BINARY_NO_FIELD_LEN;
+ field->field_show(m, show, &e->template_data[i]);
}
return 0;
}
diff --git a/security/integrity/ima/ima_init.c b/security/integrity/ima/ima_init.c
index 15f34bd40abe..37122768554a 100644
--- a/security/integrity/ima/ima_init.c
+++ b/security/integrity/ima/ima_init.c
@@ -63,7 +63,6 @@ static void __init ima_add_boot_aggregate(void)
result = ima_calc_boot_aggregate(&hash.hdr);
if (result < 0) {
audit_cause = "hashing_error";
- kfree(entry);
goto err_out;
}
}
@@ -76,7 +75,7 @@ static void __init ima_add_boot_aggregate(void)
result = ima_store_template(entry, violation, NULL,
boot_aggregate_name);
if (result < 0)
- kfree(entry);
+ ima_free_template_entry(entry);
return;
err_out:
integrity_audit_msg(AUDIT_INTEGRITY_PCR, NULL, boot_aggregate_name, op,
diff --git a/security/integrity/ima/ima_template.c b/security/integrity/ima/ima_template.c
index 4e5da990630b..635695f6a185 100644
--- a/security/integrity/ima/ima_template.c
+++ b/security/integrity/ima/ima_template.c
@@ -90,7 +90,7 @@ static struct ima_template_field *lookup_template_field(const char *field_id)
return NULL;
}
-static int template_fmt_size(char *template_fmt)
+static int template_fmt_size(const char *template_fmt)
{
char c;
int template_fmt_len = strlen(template_fmt);
@@ -106,22 +106,29 @@ static int template_fmt_size(char *template_fmt)
return j + 1;
}
-static int template_desc_init_fields(char *template_fmt,
+static int template_desc_init_fields(const char *template_fmt,
struct ima_template_field ***fields,
int *num_fields)
{
- char *c, *template_fmt_ptr = template_fmt;
+ char *c, *template_fmt_copy, *template_fmt_ptr;
int template_num_fields = template_fmt_size(template_fmt);
int i, result = 0;
if (template_num_fields > IMA_TEMPLATE_NUM_FIELDS_MAX)
return -EINVAL;
+ /* copying is needed as strsep() modifies the original buffer */
+ template_fmt_copy = kstrdup(template_fmt, GFP_KERNEL);
+ if (template_fmt_copy == NULL)
+ return -ENOMEM;
+
*fields = kzalloc(template_num_fields * sizeof(*fields), GFP_KERNEL);
if (*fields == NULL) {
result = -ENOMEM;
goto out;
}
+
+ template_fmt_ptr = template_fmt_copy;
for (i = 0; (c = strsep(&template_fmt_ptr, "|")) != NULL &&
i < template_num_fields; i++) {
struct ima_template_field *f = lookup_template_field(c);
@@ -133,10 +140,12 @@ static int template_desc_init_fields(char *template_fmt,
(*fields)[i] = f;
}
*num_fields = i;
- return 0;
out:
- kfree(*fields);
- *fields = NULL;
+ if (result < 0) {
+ kfree(*fields);
+ *fields = NULL;
+ }
+ kfree(template_fmt_copy);
return result;
}
diff --git a/security/integrity/ima/ima_template_lib.c b/security/integrity/ima/ima_template_lib.c
index 6d01c694a32c..1683bbf289a4 100644
--- a/security/integrity/ima/ima_template_lib.c
+++ b/security/integrity/ima/ima_template_lib.c
@@ -109,9 +109,12 @@ static void ima_show_template_data_binary(struct seq_file *m,
enum data_formats datafmt,
struct ima_field_data *field_data)
{
- ima_putc(m, &field_data->len, sizeof(u32));
+ if (show != IMA_SHOW_BINARY_NO_FIELD_LEN)
+ ima_putc(m, &field_data->len, sizeof(u32));
+
if (!field_data->len)
return;
+
ima_putc(m, field_data->data, field_data->len);
}
@@ -125,6 +128,7 @@ static void ima_show_template_field_data(struct seq_file *m,
ima_show_template_data_ascii(m, show, datafmt, field_data);
break;
case IMA_SHOW_BINARY:
+ case IMA_SHOW_BINARY_NO_FIELD_LEN:
ima_show_template_data_binary(m, show, datafmt, field_data);
break;
default:
diff --git a/security/integrity/integrity.h b/security/integrity/integrity.h
index b9e7c133734a..2fb5e53e927f 100644
--- a/security/integrity/integrity.h
+++ b/security/integrity/integrity.h
@@ -137,19 +137,12 @@ static inline int integrity_digsig_verify(const unsigned int id,
#ifdef CONFIG_INTEGRITY_ASYMMETRIC_KEYS
int asymmetric_verify(struct key *keyring, const char *sig,
int siglen, const char *data, int datalen);
-
-int integrity_init_keyring(const unsigned int id);
#else
static inline int asymmetric_verify(struct key *keyring, const char *sig,
int siglen, const char *data, int datalen)
{
return -EOPNOTSUPP;
}
-
-static int integrity_init_keyring(const unsigned int id)
-{
- return 0;
-}
#endif
#ifdef CONFIG_INTEGRITY_AUDIT
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-24 10:01:26 +0300