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cifs: factor out check for extended security bit into separate function
Signed-off-by: Jeff Layton <jlayton@redhat.com> Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru> Signed-off-by: Steve French <smfrench@gmail.com>
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@ -539,6 +539,20 @@ decode_lanman_negprot_rsp(struct TCP_Server_Info *server, NEGOTIATE_RSP *pSMBr,
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}
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#endif
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static bool
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should_set_ext_sec_flag(unsigned int secFlags)
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{
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if ((secFlags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
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return true;
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else if ((secFlags & CIFSSEC_AUTH_MASK) == CIFSSEC_MAY_KRB5)
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return true;
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else if ((secFlags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
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return true;
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else if ((secFlags & CIFSSEC_AUTH_MASK) == CIFSSEC_MAY_NTLMSSP)
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return true;
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return false;
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}
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int
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CIFSSMBNegotiate(const unsigned int xid, struct cifs_ses *ses)
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{
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@ -572,15 +586,8 @@ CIFSSMBNegotiate(const unsigned int xid, struct cifs_ses *ses)
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pSMB->hdr.Mid = get_next_mid(server);
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pSMB->hdr.Flags2 |= (SMBFLG2_UNICODE | SMBFLG2_ERR_STATUS);
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if ((secFlags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
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pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC;
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else if ((secFlags & CIFSSEC_AUTH_MASK) == CIFSSEC_MAY_KRB5) {
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cifs_dbg(FYI, "Kerberos only mechanism, enable extended security\n");
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pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC;
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} else if ((secFlags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
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pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC;
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else if ((secFlags & CIFSSEC_AUTH_MASK) == CIFSSEC_MAY_NTLMSSP) {
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cifs_dbg(FYI, "NTLMSSP only mechanism, enable extended security\n");
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if (should_set_ext_sec_flag(secFlags)) {
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cifs_dbg(FYI, "Requesting extended security.");
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pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC;
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}
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