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Diffstat (limited to 'net/sunrpc/auth_gss/gss_spkm3_seal.c')
-rw-r--r--net/sunrpc/auth_gss/gss_spkm3_seal.c132
1 files changed, 132 insertions, 0 deletions
diff --git a/net/sunrpc/auth_gss/gss_spkm3_seal.c b/net/sunrpc/auth_gss/gss_spkm3_seal.c
new file mode 100644
index 00000000000..25339868d46
--- /dev/null
+++ b/net/sunrpc/auth_gss/gss_spkm3_seal.c
@@ -0,0 +1,132 @@
+/*
+ * linux/net/sunrpc/gss_spkm3_seal.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
+
+/*
+ * spkm3_make_token()
+ *
+ * Only SPKM_MIC_TOK with md5 intg-alg is supported
+ */
+
+u32
+spkm3_make_token(struct spkm3_ctx *ctx, int qop_req,
+ struct xdr_buf * text, struct xdr_netobj * token,
+ int toktype)
+{
+ s32 checksum_type;
+ char tokhdrbuf[25];
+ struct xdr_netobj md5cksum = {.len = 0, .data = NULL};
+ struct xdr_netobj mic_hdr = {.len = 0, .data = tokhdrbuf};
+ int tmsglen, tokenlen = 0;
+ unsigned char *ptr;
+ s32 now;
+ int ctxelen = 0, ctxzbit = 0;
+ int md5elen = 0, md5zbit = 0;
+
+ dprintk("RPC: spkm3_make_token\n");
+
+ now = jiffies;
+ if (qop_req != 0)
+ goto out_err;
+
+ if (ctx->ctx_id.len != 16) {
+ dprintk("RPC: spkm3_make_token BAD ctx_id.len %d\n",
+ ctx->ctx_id.len);
+ goto out_err;
+ }
+
+ switch (ctx->intg_alg) {
+ case NID_md5:
+ checksum_type = CKSUMTYPE_RSA_MD5;
+ break;
+ default:
+ dprintk("RPC: gss_spkm3_seal: ctx->signalg %d not"
+ " supported\n", ctx->intg_alg);
+ goto out_err;
+ }
+ /* XXX since we don't support WRAP, perhaps we don't care... */
+ if (ctx->conf_alg != NID_cast5_cbc) {
+ dprintk("RPC: gss_spkm3_seal: ctx->sealalg %d not supported\n",
+ ctx->conf_alg);
+ goto out_err;
+ }
+
+ if (toktype == SPKM_MIC_TOK) {
+ tmsglen = 0;
+ /* Calculate checksum over the mic-header */
+ asn1_bitstring_len(&ctx->ctx_id, &ctxelen, &ctxzbit);
+ spkm3_mic_header(&mic_hdr.data, &mic_hdr.len, ctx->ctx_id.data,
+ ctxelen, ctxzbit);
+
+ if (make_checksum(checksum_type, mic_hdr.data, mic_hdr.len,
+ text, &md5cksum))
+ goto out_err;
+
+ asn1_bitstring_len(&md5cksum, &md5elen, &md5zbit);
+ tokenlen = 10 + ctxelen + 1 + 2 + md5elen + 1;
+
+ /* Create token header using generic routines */
+ token->len = g_token_size(&ctx->mech_used, tokenlen + tmsglen);
+
+ ptr = token->data;
+ g_make_token_header(&ctx->mech_used, tokenlen + tmsglen, &ptr);
+
+ spkm3_make_mic_token(&ptr, tokenlen, &mic_hdr, &md5cksum, md5elen, md5zbit);
+ } else if (toktype == SPKM_WRAP_TOK) { /* Not Supported */
+ dprintk("RPC: gss_spkm3_seal: SPKM_WRAP_TOK not supported\n");
+ goto out_err;
+ }
+ kfree(md5cksum.data);
+
+ /* XXX need to implement sequence numbers, and ctx->expired */
+
+ return GSS_S_COMPLETE;
+out_err:
+ if (md5cksum.data)
+ kfree(md5cksum.data);
+ token->data = NULL;
+ token->len = 0;
+ return GSS_S_FAILURE;
+}