v4.19.13 snapshot.
diff --git a/security/integrity/ima/ima.h b/security/integrity/ima/ima.h
new file mode 100644
index 0000000..67db9d9
--- /dev/null
+++ b/security/integrity/ima/ima.h
@@ -0,0 +1,323 @@
+/*
+ * Copyright (C) 2005,2006,2007,2008 IBM Corporation
+ *
+ * Authors:
+ * Reiner Sailer <sailer@watson.ibm.com>
+ * Mimi Zohar <zohar@us.ibm.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation, version 2 of the
+ * License.
+ *
+ * File: ima.h
+ * internal Integrity Measurement Architecture (IMA) definitions
+ */
+
+#ifndef __LINUX_IMA_H
+#define __LINUX_IMA_H
+
+#include <linux/types.h>
+#include <linux/crypto.h>
+#include <linux/fs.h>
+#include <linux/security.h>
+#include <linux/hash.h>
+#include <linux/tpm.h>
+#include <linux/audit.h>
+#include <crypto/hash_info.h>
+
+#include "../integrity.h"
+
+#ifdef CONFIG_HAVE_IMA_KEXEC
+#include <asm/ima.h>
+#endif
+
+enum ima_show_type { IMA_SHOW_BINARY, IMA_SHOW_BINARY_NO_FIELD_LEN,
+ IMA_SHOW_BINARY_OLD_STRING_FMT, IMA_SHOW_ASCII };
+enum tpm_pcrs { TPM_PCR0 = 0, TPM_PCR8 = 8 };
+
+/* digest size for IMA, fits SHA1 or MD5 */
+#define IMA_DIGEST_SIZE SHA1_DIGEST_SIZE
+#define IMA_EVENT_NAME_LEN_MAX 255
+
+#define IMA_HASH_BITS 9
+#define IMA_MEASURE_HTABLE_SIZE (1 << IMA_HASH_BITS)
+
+#define IMA_TEMPLATE_FIELD_ID_MAX_LEN 16
+#define IMA_TEMPLATE_NUM_FIELDS_MAX 15
+
+#define IMA_TEMPLATE_IMA_NAME "ima"
+#define IMA_TEMPLATE_IMA_FMT "d|n"
+
+/* current content of the policy */
+extern int ima_policy_flag;
+
+/* set during initialization */
+extern int ima_hash_algo;
+extern int ima_appraise;
+extern struct tpm_chip *ima_tpm_chip;
+
+/* IMA event related data */
+struct ima_event_data {
+ struct integrity_iint_cache *iint;
+ struct file *file;
+ const unsigned char *filename;
+ struct evm_ima_xattr_data *xattr_value;
+ int xattr_len;
+ const char *violation;
+};
+
+/* IMA template field data definition */
+struct ima_field_data {
+ u8 *data;
+ u32 len;
+};
+
+/* IMA template field definition */
+struct ima_template_field {
+ const char field_id[IMA_TEMPLATE_FIELD_ID_MAX_LEN];
+ int (*field_init)(struct ima_event_data *event_data,
+ struct ima_field_data *field_data);
+ void (*field_show)(struct seq_file *m, enum ima_show_type show,
+ struct ima_field_data *field_data);
+};
+
+/* IMA template descriptor definition */
+struct ima_template_desc {
+ struct list_head list;
+ char *name;
+ char *fmt;
+ int num_fields;
+ struct ima_template_field **fields;
+};
+
+struct ima_template_entry {
+ int pcr;
+ u8 digest[TPM_DIGEST_SIZE]; /* sha1 or md5 measurement hash */
+ struct ima_template_desc *template_desc; /* template descriptor */
+ u32 template_data_len;
+ struct ima_field_data template_data[0]; /* template related data */
+};
+
+struct ima_queue_entry {
+ struct hlist_node hnext; /* place in hash collision list */
+ struct list_head later; /* place in ima_measurements list */
+ struct ima_template_entry *entry;
+};
+extern struct list_head ima_measurements; /* list of all measurements */
+
+/* Some details preceding the binary serialized measurement list */
+struct ima_kexec_hdr {
+ u16 version;
+ u16 _reserved0;
+ u32 _reserved1;
+ u64 buffer_size;
+ u64 count;
+};
+
+#ifdef CONFIG_HAVE_IMA_KEXEC
+void ima_load_kexec_buffer(void);
+#else
+static inline void ima_load_kexec_buffer(void) {}
+#endif /* CONFIG_HAVE_IMA_KEXEC */
+
+/*
+ * The default binary_runtime_measurements list format is defined as the
+ * platform native format. The canonical format is defined as little-endian.
+ */
+extern bool ima_canonical_fmt;
+
+/* Internal IMA function definitions */
+int ima_init(void);
+int ima_fs_init(void);
+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_buffer_hash(const void *buf, loff_t len,
+ struct ima_digest_data *hash);
+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,
+ struct integrity_iint_cache *iint,
+ const char *op, const char *cause);
+int ima_init_crypto(void);
+void ima_putc(struct seq_file *m, void *data, int datalen);
+void ima_print_digest(struct seq_file *m, u8 *digest, u32 size);
+struct ima_template_desc *ima_template_desc_current(void);
+int ima_restore_measurement_entry(struct ima_template_entry *entry);
+int ima_restore_measurement_list(loff_t bufsize, void *buf);
+int ima_measurements_show(struct seq_file *m, void *v);
+unsigned long ima_get_binary_runtime_size(void);
+int ima_init_template(void);
+void ima_init_template_list(void);
+
+/*
+ * used to protect h_table and sha_table
+ */
+extern spinlock_t ima_queue_lock;
+
+struct ima_h_table {
+ atomic_long_t len; /* number of stored measurements in the list */
+ atomic_long_t violations;
+ struct hlist_head queue[IMA_MEASURE_HTABLE_SIZE];
+};
+extern struct ima_h_table ima_htable;
+
+static inline unsigned long ima_hash_key(u8 *digest)
+{
+ return hash_long(*digest, IMA_HASH_BITS);
+}
+
+#define __ima_hooks(hook) \
+ hook(NONE) \
+ hook(FILE_CHECK) \
+ hook(MMAP_CHECK) \
+ hook(BPRM_CHECK) \
+ hook(CREDS_CHECK) \
+ hook(POST_SETATTR) \
+ hook(MODULE_CHECK) \
+ hook(FIRMWARE_CHECK) \
+ hook(KEXEC_KERNEL_CHECK) \
+ hook(KEXEC_INITRAMFS_CHECK) \
+ hook(POLICY_CHECK) \
+ hook(MAX_CHECK)
+#define __ima_hook_enumify(ENUM) ENUM,
+
+enum ima_hooks {
+ __ima_hooks(__ima_hook_enumify)
+};
+
+/* LIM API function definitions */
+int ima_get_action(struct inode *inode, const struct cred *cred, u32 secid,
+ int mask, enum ima_hooks func, int *pcr);
+int ima_must_measure(struct inode *inode, int mask, enum ima_hooks func);
+int ima_collect_measurement(struct integrity_iint_cache *iint,
+ struct file *file, void *buf, loff_t size,
+ enum hash_algo algo);
+void ima_store_measurement(struct integrity_iint_cache *iint, struct file *file,
+ const unsigned char *filename,
+ struct evm_ima_xattr_data *xattr_value,
+ int xattr_len, int pcr);
+void ima_audit_measurement(struct integrity_iint_cache *iint,
+ const unsigned char *filename);
+int ima_alloc_init_template(struct ima_event_data *event_data,
+ struct ima_template_entry **entry);
+int ima_store_template(struct ima_template_entry *entry, int violation,
+ struct inode *inode,
+ const unsigned char *filename, int pcr);
+void ima_free_template_entry(struct ima_template_entry *entry);
+const char *ima_d_path(const struct path *path, char **pathbuf, char *filename);
+
+/* IMA policy related functions */
+int ima_match_policy(struct inode *inode, const struct cred *cred, u32 secid,
+ enum ima_hooks func, int mask, int flags, int *pcr);
+void ima_init_policy(void);
+void ima_update_policy(void);
+void ima_update_policy_flag(void);
+ssize_t ima_parse_add_rule(char *);
+void ima_delete_rules(void);
+int ima_check_policy(void);
+void *ima_policy_start(struct seq_file *m, loff_t *pos);
+void *ima_policy_next(struct seq_file *m, void *v, loff_t *pos);
+void ima_policy_stop(struct seq_file *m, void *v);
+int ima_policy_show(struct seq_file *m, void *v);
+
+/* Appraise integrity measurements */
+#define IMA_APPRAISE_ENFORCE 0x01
+#define IMA_APPRAISE_FIX 0x02
+#define IMA_APPRAISE_LOG 0x04
+#define IMA_APPRAISE_MODULES 0x08
+#define IMA_APPRAISE_FIRMWARE 0x10
+#define IMA_APPRAISE_POLICY 0x20
+#define IMA_APPRAISE_KEXEC 0x40
+
+#ifdef CONFIG_IMA_APPRAISE
+int ima_appraise_measurement(enum ima_hooks func,
+ struct integrity_iint_cache *iint,
+ struct file *file, const unsigned char *filename,
+ struct evm_ima_xattr_data *xattr_value,
+ int xattr_len);
+int ima_must_appraise(struct inode *inode, int mask, enum ima_hooks func);
+void ima_update_xattr(struct integrity_iint_cache *iint, struct file *file);
+enum integrity_status ima_get_cache_status(struct integrity_iint_cache *iint,
+ enum ima_hooks func);
+enum hash_algo ima_get_hash_algo(struct evm_ima_xattr_data *xattr_value,
+ int xattr_len);
+int ima_read_xattr(struct dentry *dentry,
+ struct evm_ima_xattr_data **xattr_value);
+
+#else
+static inline int ima_appraise_measurement(enum ima_hooks func,
+ struct integrity_iint_cache *iint,
+ struct file *file,
+ const unsigned char *filename,
+ struct evm_ima_xattr_data *xattr_value,
+ int xattr_len)
+{
+ return INTEGRITY_UNKNOWN;
+}
+
+static inline int ima_must_appraise(struct inode *inode, int mask,
+ enum ima_hooks func)
+{
+ return 0;
+}
+
+static inline void ima_update_xattr(struct integrity_iint_cache *iint,
+ struct file *file)
+{
+}
+
+static inline enum integrity_status ima_get_cache_status(struct integrity_iint_cache
+ *iint,
+ enum ima_hooks func)
+{
+ return INTEGRITY_UNKNOWN;
+}
+
+static inline enum hash_algo
+ima_get_hash_algo(struct evm_ima_xattr_data *xattr_value, int xattr_len)
+{
+ return ima_hash_algo;
+}
+
+static inline int ima_read_xattr(struct dentry *dentry,
+ struct evm_ima_xattr_data **xattr_value)
+{
+ return 0;
+}
+
+#endif /* CONFIG_IMA_APPRAISE */
+
+/* LSM based policy rules require audit */
+#ifdef CONFIG_IMA_LSM_RULES
+
+#define security_filter_rule_init security_audit_rule_init
+#define security_filter_rule_match security_audit_rule_match
+
+#else
+
+static inline int security_filter_rule_init(u32 field, u32 op, char *rulestr,
+ void **lsmrule)
+{
+ return -EINVAL;
+}
+
+static inline int security_filter_rule_match(u32 secid, u32 field, u32 op,
+ void *lsmrule,
+ struct audit_context *actx)
+{
+ return -EINVAL;
+}
+#endif /* CONFIG_IMA_LSM_RULES */
+
+#ifdef CONFIG_IMA_READ_POLICY
+#define POLICY_FILE_FLAGS (S_IWUSR | S_IRUSR)
+#else
+#define POLICY_FILE_FLAGS S_IWUSR
+#endif /* CONFIG_IMA_READ_POLICY */
+
+#endif /* __LINUX_IMA_H */