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 000000000000..25339868d462
--- /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;
+}