diff options
Diffstat (limited to 'net/sunrpc/auth_gss/gss_spkm3_token.c')
| -rw-r--r-- | net/sunrpc/auth_gss/gss_spkm3_token.c | 267 |
1 files changed, 0 insertions, 267 deletions
diff --git a/net/sunrpc/auth_gss/gss_spkm3_token.c b/net/sunrpc/auth_gss/gss_spkm3_token.c deleted file mode 100644 index a99825d..0000000 --- a/net/sunrpc/auth_gss/gss_spkm3_token.c +++ /dev/null @@ -1,267 +0,0 @@ -/* - * linux/net/sunrpc/gss_spkm3_token.c - * - * Copyright (c) 2003 The Regents of the University of Michigan. - * All rights reserved. - * - * Andy Adamson <andros@umich.edu> - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its - * contributors may be used to endorse or promote products derived - * from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED - * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE - * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR - * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF - * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING - * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS - * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - */ - -#include <linux/types.h> -#include <linux/slab.h> -#include <linux/jiffies.h> -#include <linux/sunrpc/gss_spkm3.h> -#include <linux/random.h> -#include <linux/crypto.h> - -#ifdef RPC_DEBUG -# define RPCDBG_FACILITY RPCDBG_AUTH -#endif - -/* - * asn1_bitstring_len() - * - * calculate the asn1 bitstring length of the xdr_netobject - */ -void -asn1_bitstring_len(struct xdr_netobj *in, int *enclen, int *zerobits) -{ - int i, zbit = 0,elen = in->len; - char *ptr; - - ptr = &in->data[in->len -1]; - - /* count trailing 0's */ - for(i = in->len; i > 0; i--) { - if (*ptr == 0) { - ptr--; - elen--; - } else - break; - } - - /* count number of 0 bits in final octet */ - ptr = &in->data[elen - 1]; - for(i = 0; i < 8; i++) { - short mask = 0x01; - - if (!((mask << i) & *ptr)) - zbit++; - else - break; - } - *enclen = elen; - *zerobits = zbit; -} - -/* - * decode_asn1_bitstring() - * - * decode a bitstring into a buffer of the expected length. - * enclen = bit string length - * explen = expected length (define in rfc) - */ -int -decode_asn1_bitstring(struct xdr_netobj *out, char *in, int enclen, int explen) -{ - if (!(out->data = kzalloc(explen,GFP_NOFS))) - return 0; - out->len = explen; - memcpy(out->data, in, enclen); - return 1; -} - -/* - * SPKMInnerContextToken choice SPKM_MIC asn1 token layout - * - * contextid is always 16 bytes plain data. max asn1 bitstring len = 17. - * - * tokenlen = pos[0] to end of token (max pos[45] with MD5 cksum) - * - * pos value - * ---------- - * [0] a4 SPKM-MIC tag - * [1] ?? innertoken length (max 44) - * - * - * tok_hdr piece of checksum data starts here - * - * the maximum mic-header len = 9 + 17 = 26 - * mic-header - * ---------- - * [2] 30 SEQUENCE tag - * [3] ?? mic-header length: (max 23) = TokenID + ContextID - * - * TokenID - all fields constant and can be hardcoded - * ------- - * [4] 02 Type 2 - * [5] 02 Length 2 - * [6][7] 01 01 TokenID (SPKM_MIC_TOK) - * - * ContextID - encoded length not constant, calculated - * --------- - * [8] 03 Type 3 - * [9] ?? encoded length - * [10] ?? ctxzbit - * [11] contextid - * - * mic_header piece of checksum data ends here. - * - * int-cksum - encoded length not constant, calculated - * --------- - * [??] 03 Type 3 - * [??] ?? encoded length - * [??] ?? md5zbit - * [??] int-cksum (NID_md5 = 16) - * - * maximum SPKM-MIC innercontext token length = - * 10 + encoded contextid_size(17 max) + 2 + encoded - * cksum_size (17 maxfor NID_md5) = 46 - */ - -/* - * spkm3_mic_header() - * - * Prepare the SPKM_MIC_TOK mic-header for check-sum calculation - * elen: 16 byte context id asn1 bitstring encoded length - */ -void -spkm3_mic_header(unsigned char **hdrbuf, unsigned int *hdrlen, unsigned char *ctxdata, int elen, int zbit) -{ - char *hptr = *hdrbuf; - char *top = *hdrbuf; - - *(u8 *)hptr++ = 0x30; - *(u8 *)hptr++ = elen + 7; /* on the wire header length */ - - /* tokenid */ - *(u8 *)hptr++ = 0x02; - *(u8 *)hptr++ = 0x02; - *(u8 *)hptr++ = 0x01; - *(u8 *)hptr++ = 0x01; - - /* coniextid */ - *(u8 *)hptr++ = 0x03; - *(u8 *)hptr++ = elen + 1; /* add 1 to include zbit */ - *(u8 *)hptr++ = zbit; - memcpy(hptr, ctxdata, elen); - hptr += elen; - *hdrlen = hptr - top; -} - -/* - * spkm3_mic_innercontext_token() - * - * *tokp points to the beginning of the SPKM_MIC token described - * in rfc 2025, section 3.2.1: - * - * toklen is the inner token length - */ -void -spkm3_make_mic_token(unsigned char **tokp, int toklen, struct xdr_netobj *mic_hdr, struct xdr_netobj *md5cksum, int md5elen, int md5zbit) -{ - unsigned char *ict = *tokp; - - *(u8 *)ict++ = 0xa4; - *(u8 *)ict++ = toklen; - memcpy(ict, mic_hdr->data, mic_hdr->len); - ict += mic_hdr->len; - - *(u8 *)ict++ = 0x03; - *(u8 *)ict++ = md5elen + 1; /* add 1 to include zbit */ - *(u8 *)ict++ = md5zbit; - memcpy(ict, md5cksum->data, md5elen); -} - -u32 -spkm3_verify_mic_token(unsigned char **tokp, int *mic_hdrlen, unsigned char **cksum) -{ - struct xdr_netobj spkm3_ctx_id = {.len =0, .data = NULL}; - unsigned char *ptr = *tokp; - int ctxelen; - u32 ret = GSS_S_DEFECTIVE_TOKEN; - - /* spkm3 innercontext token preamble */ - if ((ptr[0] != 0xa4) || (ptr[2] != 0x30)) { - dprintk("RPC: BAD SPKM ictoken preamble\n"); - goto out; - } - - *mic_hdrlen = ptr[3]; - - /* token type */ - if ((ptr[4] != 0x02) || (ptr[5] != 0x02)) { - dprintk("RPC: BAD asn1 SPKM3 token type\n"); - goto out; - } - - /* only support SPKM_MIC_TOK */ - if((ptr[6] != 0x01) || (ptr[7] != 0x01)) { - dprintk("RPC: ERROR unsupported SPKM3 token\n"); - goto out; - } - - /* contextid */ - if (ptr[8] != 0x03) { - dprintk("RPC: BAD SPKM3 asn1 context-id type\n"); - goto out; - } - - ctxelen = ptr[9]; - if (ctxelen > 17) { /* length includes asn1 zbit octet */ - dprintk("RPC: BAD SPKM3 contextid len %d\n", ctxelen); - goto out; - } - - /* ignore ptr[10] */ - - if(!decode_asn1_bitstring(&spkm3_ctx_id, &ptr[11], ctxelen - 1, 16)) - goto out; - - /* - * in the current implementation: the optional int-alg is not present - * so the default int-alg (md5) is used the optional snd-seq field is - * also not present - */ - - if (*mic_hdrlen != 6 + ctxelen) { - dprintk("RPC: BAD SPKM_ MIC_TOK header len %d: we only " - "support default int-alg (should be absent) " - "and do not support snd-seq\n", *mic_hdrlen); - goto out; - } - /* checksum */ - *cksum = (&ptr[10] + ctxelen); /* ctxelen includes ptr[10] */ - - ret = GSS_S_COMPLETE; -out: - kfree(spkm3_ctx_id.data); - return ret; -} - |
