mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-21 11:44:01 +08:00
a24d22b225
Currently <crypto/sha.h> contains declarations for both SHA-1 and SHA-2, and <crypto/sha3.h> contains declarations for SHA-3. This organization is inconsistent, but more importantly SHA-1 is no longer considered to be cryptographically secure. So to the extent possible, SHA-1 shouldn't be grouped together with any of the other SHA versions, and usage of it should be phased out. Therefore, split <crypto/sha.h> into two headers <crypto/sha1.h> and <crypto/sha2.h>, and make everyone explicitly specify whether they want the declarations for SHA-1, SHA-2, or both. This avoids making the SHA-1 declarations visible to files that don't want anything to do with SHA-1. It also prepares for potentially moving sha1.h into a new insecure/ or dangerous/ directory. Signed-off-by: Eric Biggers <ebiggers@google.com> Acked-by: Ard Biesheuvel <ardb@kernel.org> Acked-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
286 lines
7.4 KiB
C
286 lines
7.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright (C) 2009-2010 IBM Corporation
|
|
*
|
|
* Authors:
|
|
* Mimi Zohar <zohar@us.ibm.com>
|
|
*/
|
|
|
|
#ifdef pr_fmt
|
|
#undef pr_fmt
|
|
#endif
|
|
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/integrity.h>
|
|
#include <crypto/sha1.h>
|
|
#include <linux/key.h>
|
|
#include <linux/audit.h>
|
|
|
|
/* iint action cache flags */
|
|
#define IMA_MEASURE 0x00000001
|
|
#define IMA_MEASURED 0x00000002
|
|
#define IMA_APPRAISE 0x00000004
|
|
#define IMA_APPRAISED 0x00000008
|
|
/*#define IMA_COLLECT 0x00000010 do not use this flag */
|
|
#define IMA_COLLECTED 0x00000020
|
|
#define IMA_AUDIT 0x00000040
|
|
#define IMA_AUDITED 0x00000080
|
|
#define IMA_HASH 0x00000100
|
|
#define IMA_HASHED 0x00000200
|
|
|
|
/* iint cache flags */
|
|
#define IMA_ACTION_FLAGS 0xff000000
|
|
#define IMA_DIGSIG_REQUIRED 0x01000000
|
|
#define IMA_PERMIT_DIRECTIO 0x02000000
|
|
#define IMA_NEW_FILE 0x04000000
|
|
#define EVM_IMMUTABLE_DIGSIG 0x08000000
|
|
#define IMA_FAIL_UNVERIFIABLE_SIGS 0x10000000
|
|
#define IMA_MODSIG_ALLOWED 0x20000000
|
|
#define IMA_CHECK_BLACKLIST 0x40000000
|
|
|
|
#define IMA_DO_MASK (IMA_MEASURE | IMA_APPRAISE | IMA_AUDIT | \
|
|
IMA_HASH | IMA_APPRAISE_SUBMASK)
|
|
#define IMA_DONE_MASK (IMA_MEASURED | IMA_APPRAISED | IMA_AUDITED | \
|
|
IMA_HASHED | IMA_COLLECTED | \
|
|
IMA_APPRAISED_SUBMASK)
|
|
|
|
/* iint subaction appraise cache flags */
|
|
#define IMA_FILE_APPRAISE 0x00001000
|
|
#define IMA_FILE_APPRAISED 0x00002000
|
|
#define IMA_MMAP_APPRAISE 0x00004000
|
|
#define IMA_MMAP_APPRAISED 0x00008000
|
|
#define IMA_BPRM_APPRAISE 0x00010000
|
|
#define IMA_BPRM_APPRAISED 0x00020000
|
|
#define IMA_READ_APPRAISE 0x00040000
|
|
#define IMA_READ_APPRAISED 0x00080000
|
|
#define IMA_CREDS_APPRAISE 0x00100000
|
|
#define IMA_CREDS_APPRAISED 0x00200000
|
|
#define IMA_APPRAISE_SUBMASK (IMA_FILE_APPRAISE | IMA_MMAP_APPRAISE | \
|
|
IMA_BPRM_APPRAISE | IMA_READ_APPRAISE | \
|
|
IMA_CREDS_APPRAISE)
|
|
#define IMA_APPRAISED_SUBMASK (IMA_FILE_APPRAISED | IMA_MMAP_APPRAISED | \
|
|
IMA_BPRM_APPRAISED | IMA_READ_APPRAISED | \
|
|
IMA_CREDS_APPRAISED)
|
|
|
|
/* iint cache atomic_flags */
|
|
#define IMA_CHANGE_XATTR 0
|
|
#define IMA_UPDATE_XATTR 1
|
|
#define IMA_CHANGE_ATTR 2
|
|
#define IMA_DIGSIG 3
|
|
#define IMA_MUST_MEASURE 4
|
|
|
|
enum evm_ima_xattr_type {
|
|
IMA_XATTR_DIGEST = 0x01,
|
|
EVM_XATTR_HMAC,
|
|
EVM_IMA_XATTR_DIGSIG,
|
|
IMA_XATTR_DIGEST_NG,
|
|
EVM_XATTR_PORTABLE_DIGSIG,
|
|
IMA_XATTR_LAST
|
|
};
|
|
|
|
struct evm_ima_xattr_data {
|
|
u8 type;
|
|
u8 data[];
|
|
} __packed;
|
|
|
|
/* Only used in the EVM HMAC code. */
|
|
struct evm_xattr {
|
|
struct evm_ima_xattr_data data;
|
|
u8 digest[SHA1_DIGEST_SIZE];
|
|
} __packed;
|
|
|
|
#define IMA_MAX_DIGEST_SIZE 64
|
|
|
|
struct ima_digest_data {
|
|
u8 algo;
|
|
u8 length;
|
|
union {
|
|
struct {
|
|
u8 unused;
|
|
u8 type;
|
|
} sha1;
|
|
struct {
|
|
u8 type;
|
|
u8 algo;
|
|
} ng;
|
|
u8 data[2];
|
|
} xattr;
|
|
u8 digest[];
|
|
} __packed;
|
|
|
|
/*
|
|
* signature format v2 - for using with asymmetric keys
|
|
*/
|
|
struct signature_v2_hdr {
|
|
uint8_t type; /* xattr type */
|
|
uint8_t version; /* signature format version */
|
|
uint8_t hash_algo; /* Digest algorithm [enum hash_algo] */
|
|
__be32 keyid; /* IMA key identifier - not X509/PGP specific */
|
|
__be16 sig_size; /* signature size */
|
|
uint8_t sig[]; /* signature payload */
|
|
} __packed;
|
|
|
|
/* integrity data associated with an inode */
|
|
struct integrity_iint_cache {
|
|
struct rb_node rb_node; /* rooted in integrity_iint_tree */
|
|
struct mutex mutex; /* protects: version, flags, digest */
|
|
struct inode *inode; /* back pointer to inode in question */
|
|
u64 version; /* track inode changes */
|
|
unsigned long flags;
|
|
unsigned long measured_pcrs;
|
|
unsigned long atomic_flags;
|
|
enum integrity_status ima_file_status:4;
|
|
enum integrity_status ima_mmap_status:4;
|
|
enum integrity_status ima_bprm_status:4;
|
|
enum integrity_status ima_read_status:4;
|
|
enum integrity_status ima_creds_status:4;
|
|
enum integrity_status evm_status:4;
|
|
struct ima_digest_data *ima_hash;
|
|
};
|
|
|
|
/* rbtree tree calls to lookup, insert, delete
|
|
* integrity data associated with an inode.
|
|
*/
|
|
struct integrity_iint_cache *integrity_iint_find(struct inode *inode);
|
|
|
|
int integrity_kernel_read(struct file *file, loff_t offset,
|
|
void *addr, unsigned long count);
|
|
|
|
#define INTEGRITY_KEYRING_EVM 0
|
|
#define INTEGRITY_KEYRING_IMA 1
|
|
#define INTEGRITY_KEYRING_PLATFORM 2
|
|
#define INTEGRITY_KEYRING_MAX 3
|
|
|
|
extern struct dentry *integrity_dir;
|
|
|
|
struct modsig;
|
|
|
|
#ifdef CONFIG_INTEGRITY_SIGNATURE
|
|
|
|
int integrity_digsig_verify(const unsigned int id, const char *sig, int siglen,
|
|
const char *digest, int digestlen);
|
|
int integrity_modsig_verify(unsigned int id, const struct modsig *modsig);
|
|
|
|
int __init integrity_init_keyring(const unsigned int id);
|
|
int __init integrity_load_x509(const unsigned int id, const char *path);
|
|
int __init integrity_load_cert(const unsigned int id, const char *source,
|
|
const void *data, size_t len, key_perm_t perm);
|
|
#else
|
|
|
|
static inline int integrity_digsig_verify(const unsigned int id,
|
|
const char *sig, int siglen,
|
|
const char *digest, int digestlen)
|
|
{
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static inline int integrity_modsig_verify(unsigned int id,
|
|
const struct modsig *modsig)
|
|
{
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static inline int integrity_init_keyring(const unsigned int id)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int __init integrity_load_cert(const unsigned int id,
|
|
const char *source,
|
|
const void *data, size_t len,
|
|
key_perm_t perm)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_INTEGRITY_SIGNATURE */
|
|
|
|
#ifdef CONFIG_INTEGRITY_ASYMMETRIC_KEYS
|
|
int asymmetric_verify(struct key *keyring, const char *sig,
|
|
int siglen, const char *data, int datalen);
|
|
#else
|
|
static inline int asymmetric_verify(struct key *keyring, const char *sig,
|
|
int siglen, const char *data, int datalen)
|
|
{
|
|
return -EOPNOTSUPP;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_IMA_APPRAISE_MODSIG
|
|
int ima_modsig_verify(struct key *keyring, const struct modsig *modsig);
|
|
#else
|
|
static inline int ima_modsig_verify(struct key *keyring,
|
|
const struct modsig *modsig)
|
|
{
|
|
return -EOPNOTSUPP;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_IMA_LOAD_X509
|
|
void __init ima_load_x509(void);
|
|
#else
|
|
static inline void ima_load_x509(void)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_EVM_LOAD_X509
|
|
void __init evm_load_x509(void);
|
|
#else
|
|
static inline void evm_load_x509(void)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_INTEGRITY_AUDIT
|
|
/* declarations */
|
|
void integrity_audit_msg(int audit_msgno, struct inode *inode,
|
|
const unsigned char *fname, const char *op,
|
|
const char *cause, int result, int info);
|
|
|
|
void integrity_audit_message(int audit_msgno, struct inode *inode,
|
|
const unsigned char *fname, const char *op,
|
|
const char *cause, int result, int info,
|
|
int errno);
|
|
|
|
static inline struct audit_buffer *
|
|
integrity_audit_log_start(struct audit_context *ctx, gfp_t gfp_mask, int type)
|
|
{
|
|
return audit_log_start(ctx, gfp_mask, type);
|
|
}
|
|
|
|
#else
|
|
static inline void integrity_audit_msg(int audit_msgno, struct inode *inode,
|
|
const unsigned char *fname,
|
|
const char *op, const char *cause,
|
|
int result, int info)
|
|
{
|
|
}
|
|
|
|
static inline void integrity_audit_message(int audit_msgno,
|
|
struct inode *inode,
|
|
const unsigned char *fname,
|
|
const char *op, const char *cause,
|
|
int result, int info, int errno)
|
|
{
|
|
}
|
|
|
|
static inline struct audit_buffer *
|
|
integrity_audit_log_start(struct audit_context *ctx, gfp_t gfp_mask, int type)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
#endif
|
|
|
|
#ifdef CONFIG_INTEGRITY_PLATFORM_KEYRING
|
|
void __init add_to_platform_keyring(const char *source, const void *data,
|
|
size_t len);
|
|
#else
|
|
static inline void __init add_to_platform_keyring(const char *source,
|
|
const void *data, size_t len)
|
|
{
|
|
}
|
|
#endif
|