diff options
Diffstat (limited to 'fs/crypto/policy.c')
-rw-r--r-- | fs/crypto/policy.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/fs/crypto/policy.c b/fs/crypto/policy.c index ed3d623724cd..2a11276913a9 100644 --- a/fs/crypto/policy.c +++ b/fs/crypto/policy.c @@ -32,6 +32,26 @@ bool fscrypt_policies_equal(const union fscrypt_policy *policy1, return !memcmp(policy1, policy2, fscrypt_policy_size(policy1)); } +int fscrypt_policy_to_key_spec(const union fscrypt_policy *policy, + struct fscrypt_key_specifier *key_spec) +{ + switch (policy->version) { + case FSCRYPT_POLICY_V1: + key_spec->type = FSCRYPT_KEY_SPEC_TYPE_DESCRIPTOR; + memcpy(key_spec->u.descriptor, policy->v1.master_key_descriptor, + FSCRYPT_KEY_DESCRIPTOR_SIZE); + return 0; + case FSCRYPT_POLICY_V2: + key_spec->type = FSCRYPT_KEY_SPEC_TYPE_IDENTIFIER; + memcpy(key_spec->u.identifier, policy->v2.master_key_identifier, + FSCRYPT_KEY_IDENTIFIER_SIZE); + return 0; + default: + WARN_ON(1); + return -EINVAL; + } +} + static const union fscrypt_policy * fscrypt_get_dummy_policy(struct super_block *sb) { |