1 // SPDX-License-Identifier: GPL-2.0-or-later 2 3 #include <linux/module.h> 4 #include <linux/kernel.h> 5 #include <linux/oid_registry.h> 6 #include "cifsglob.h" 7 #include "cifs_debug.h" 8 #include "cifsproto.h" 9 #include "cifs_spnego_negtokeninit.asn1.h" 10 11 int 12 decode_negTokenInit(unsigned char *security_blob, int length, 13 struct TCP_Server_Info *server) 14 { 15 if (asn1_ber_decoder(&cifs_spnego_negtokeninit_decoder, server, 16 security_blob, length) == 0) 17 return 1; 18 else 19 return 0; 20 } 21 22 int cifs_gssapi_this_mech(void *context, size_t hdrlen, 23 unsigned char tag, const void *value, size_t vlen) 24 { 25 enum OID oid; 26 27 oid = look_up_OID(value, vlen); 28 if (oid != OID_spnego) { 29 char buf[50]; 30 31 sprint_oid(value, vlen, buf, sizeof(buf)); 32 cifs_dbg(FYI, "Error decoding negTokenInit header: unexpected OID %s\n", 33 buf); 34 return -EBADMSG; 35 } 36 return 0; 37 } 38 39 int cifs_neg_token_init_mech_type(void *context, size_t hdrlen, 40 unsigned char tag, 41 const void *value, size_t vlen) 42 { 43 struct TCP_Server_Info *server = context; 44 enum OID oid; 45 46 oid = look_up_OID(value, vlen); 47 if (oid == OID_mskrb5) 48 server->sec_mskerberos = true; 49 else if (oid == OID_krb5u2u) 50 server->sec_kerberosu2u = true; 51 else if (oid == OID_krb5) 52 server->sec_kerberos = true; 53 else if (oid == OID_ntlmssp) 54 server->sec_ntlmssp = true; 55 else { 56 char buf[50]; 57 58 sprint_oid(value, vlen, buf, sizeof(buf)); 59 cifs_dbg(FYI, "Decoding negTokenInit: unsupported OID %s\n", 60 buf); 61 } 62 return 0; 63 } 64