diff options
| -rw-r--r-- | fs/smb/server/auth.c | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/fs/smb/server/auth.c b/fs/smb/server/auth.c index e99409fa721c..86f521e849d5 100644 --- a/fs/smb/server/auth.c +++ b/fs/smb/server/auth.c @@ -142,6 +142,7 @@ int ksmbd_auth_ntlmv2(struct ksmbd_conn *conn, struct ksmbd_session *sess, { char ntlmv2_hash[CIFS_ENCPWD_SIZE]; char ntlmv2_rsp[CIFS_HMAC_MD5_HASH_SIZE]; + char sess_key[SMB2_NTLMV2_SESSKEY_SIZE]; struct hmac_md5_ctx ctx; int rc; @@ -164,12 +165,21 @@ int ksmbd_auth_ntlmv2(struct ksmbd_conn *conn, struct ksmbd_session *sess, /* Generate the session key */ hmac_md5_usingrawkey(ntlmv2_hash, CIFS_HMAC_MD5_HASH_SIZE, ntlmv2_rsp, CIFS_HMAC_MD5_HASH_SIZE, - sess->sess_key); + sess_key); if (crypto_memneq(ntlmv2->ntlmv2_hash, ntlmv2_rsp, - CIFS_HMAC_MD5_HASH_SIZE)) - return -EINVAL; - return 0; + CIFS_HMAC_MD5_HASH_SIZE)) { + rc = -EINVAL; + goto out; + } + + memcpy(sess->sess_key, sess_key, sizeof(sess_key)); + rc = 0; +out: + memzero_explicit(ntlmv2_hash, sizeof(ntlmv2_hash)); + memzero_explicit(ntlmv2_rsp, sizeof(ntlmv2_rsp)); + memzero_explicit(sess_key, sizeof(sess_key)); + return rc; } /** @@ -226,6 +236,8 @@ int ksmbd_decode_ntlmssp_auth_blob(struct authenticate_message *authblob, nt_len - CIFS_ENCPWD_SIZE, domain_name, conn->ntlmssp.cryptkey); kfree(domain_name); + if (ret) + return ret; /* The recovered secondary session key */ if (conn->ntlmssp.client_flags & NTLMSSP_NEGOTIATE_KEY_XCH) { |