diff options
Diffstat (limited to 'fs/cifs/cifsencrypt.c')
| -rw-r--r-- | fs/cifs/cifsencrypt.c | 55 |
1 files changed, 54 insertions, 1 deletions
diff --git a/fs/cifs/cifsencrypt.c b/fs/cifs/cifsencrypt.c index fe2bb7c4c9121c..a2c24858d40f94 100644 --- a/fs/cifs/cifsencrypt.c +++ b/fs/cifs/cifsencrypt.c @@ -1,7 +1,7 @@ /* * fs/cifs/cifsencrypt.c * - * Copyright (C) International Business Machines Corp., 2003 + * Copyright (C) International Business Machines Corp., 2005 * Author(s): Steve French (sfrench@us.ibm.com) * * This library is free software; you can redistribute it and/or modify @@ -82,6 +82,59 @@ int cifs_sign_smb(struct smb_hdr * cifs_pdu, struct TCP_Server_Info * server, return rc; } +static int cifs_calc_signature2(const struct kvec * iov, int n_vec, + const char * key, char * signature) +{ + struct MD5Context context; + + if((iov == NULL) || (signature == NULL)) + return -EINVAL; + + MD5Init(&context); + MD5Update(&context,key,CIFS_SESSION_KEY_SIZE+16); + +/* MD5Update(&context,cifs_pdu->Protocol,cifs_pdu->smb_buf_length); */ /* BB FIXME BB */ + + MD5Final(signature,&context); + + return -EOPNOTSUPP; +/* return 0; */ +} + + +int cifs_sign_smb2(struct kvec * iov, int n_vec, struct TCP_Server_Info *server, + __u32 * pexpected_response_sequence_number) +{ + int rc = 0; + char smb_signature[20]; + struct smb_hdr * cifs_pdu = iov[0].iov_base; + + if((cifs_pdu == NULL) || (server == NULL)) + return -EINVAL; + + if((cifs_pdu->Flags2 & SMBFLG2_SECURITY_SIGNATURE) == 0) + return rc; + + spin_lock(&GlobalMid_Lock); + cifs_pdu->Signature.Sequence.SequenceNumber = + cpu_to_le32(server->sequence_number); + cifs_pdu->Signature.Sequence.Reserved = 0; + + *pexpected_response_sequence_number = server->sequence_number++; + server->sequence_number++; + spin_unlock(&GlobalMid_Lock); + + rc = cifs_calc_signature2(iov, n_vec, server->mac_signing_key, + smb_signature); + if(rc) + memset(cifs_pdu->Signature.SecuritySignature, 0, 8); + else + memcpy(cifs_pdu->Signature.SecuritySignature, smb_signature, 8); + + return rc; + +} + int cifs_verify_signature(struct smb_hdr * cifs_pdu, const char * mac_key, __u32 expected_sequence_number) { |