evm.h 1.7 KB

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  1. /* SPDX-License-Identifier: GPL-2.0-only */
  2. /*
  3. * Copyright (C) 2005-2010 IBM Corporation
  4. *
  5. * Authors:
  6. * Mimi Zohar <zohar@us.ibm.com>
  7. * Kylene Hall <kjhall@us.ibm.com>
  8. *
  9. * File: evm.h
  10. */
  11. #ifndef __INTEGRITY_EVM_H
  12. #define __INTEGRITY_EVM_H
  13. #include <linux/xattr.h>
  14. #include <linux/security.h>
  15. #include "../integrity.h"
  16. #define EVM_INIT_HMAC 0x0001
  17. #define EVM_INIT_X509 0x0002
  18. #define EVM_ALLOW_METADATA_WRITES 0x0004
  19. #define EVM_SETUP_COMPLETE 0x80000000 /* userland has signaled key load */
  20. #define EVM_KEY_MASK (EVM_INIT_HMAC | EVM_INIT_X509)
  21. #define EVM_INIT_MASK (EVM_INIT_HMAC | EVM_INIT_X509 | EVM_SETUP_COMPLETE | \
  22. EVM_ALLOW_METADATA_WRITES)
  23. struct xattr_list {
  24. struct list_head list;
  25. char *name;
  26. };
  27. extern int evm_initialized;
  28. #define EVM_ATTR_FSUUID 0x0001
  29. extern int evm_hmac_attrs;
  30. extern struct crypto_shash *hmac_tfm;
  31. extern struct crypto_shash *hash_tfm;
  32. /* List of EVM protected security xattrs */
  33. extern struct list_head evm_config_xattrnames;
  34. struct evm_digest {
  35. struct ima_digest_data hdr;
  36. char digest[IMA_MAX_DIGEST_SIZE];
  37. } __packed;
  38. int evm_init_key(void);
  39. int evm_update_evmxattr(struct dentry *dentry,
  40. const char *req_xattr_name,
  41. const char *req_xattr_value,
  42. size_t req_xattr_value_len);
  43. int evm_calc_hmac(struct dentry *dentry, const char *req_xattr_name,
  44. const char *req_xattr_value,
  45. size_t req_xattr_value_len, struct evm_digest *data);
  46. int evm_calc_hash(struct dentry *dentry, const char *req_xattr_name,
  47. const char *req_xattr_value,
  48. size_t req_xattr_value_len, char type,
  49. struct evm_digest *data);
  50. int evm_init_hmac(struct inode *inode, const struct xattr *xattr,
  51. char *hmac_val);
  52. int evm_init_secfs(void);
  53. #endif