adden new isakmpd

1 files changed, 161 insertions, 0 deletions

diff --git a/keyexchange/isakmpd-20041012/prf.c b/keyexchange/isakmpd-20041012/prf.c
new file mode 100644
index 0000000..fdb91fe
--- /dev/null
+++ b/keyexchange/isakmpd-20041012/prf.c
@@ -0,0 +1,161 @@
+/* $OpenBSD: prf.c,v 1.14 2004/05/23 18:17:56 hshoexer Exp $	 */
+/* $EOM: prf.c,v 1.7 1999/05/02 12:50:29 niklas Exp $	 */
+
+/*
+ * Copyright (c) 1998 Niels Provos.  All rights reserved.
+ * Copyright (c) 1999 Niklas Hallqvist.  All rights reserved.
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
+ */
+
+/*
+ * This code was written under funding by Ericsson Radio Systems.
+ */
+
+#include <sys/param.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "sysdep.h"
+
+#include "hash.h"
+#include "log.h"
+#include "prf.h"
+
+void	prf_hash_init(struct prf_hash_ctx *);
+void	prf_hash_update(struct prf_hash_ctx *, unsigned char *, unsigned int);
+void	prf_hash_final(unsigned char *, struct prf_hash_ctx *);
+
+/* PRF behaves likes a hash */
+
+void
+prf_hash_init(struct prf_hash_ctx *ctx)
+{
+	memcpy(ctx->hash->ctx, ctx->ctx, ctx->hash->ctxsize);
+	memcpy(ctx->hash->ctx2, ctx->ctx2, ctx->hash->ctxsize);
+}
+
+void
+prf_hash_update(struct prf_hash_ctx *ctx, unsigned char *data,
+    unsigned int len)
+{
+	ctx->hash->Update(ctx->hash->ctx, data, len);
+}
+
+void
+prf_hash_final(unsigned char *digest, struct prf_hash_ctx *ctx)
+{
+	ctx->hash->HMACFinal(digest, ctx->hash);
+}
+
+/*
+ * Obtain a Pseudo-Random Function for us. At the moment this is
+ * the HMAC version of a hash. See RFC-2104 for reference.
+ */
+struct prf *
+prf_alloc(enum prfs type, int subtype, unsigned char *shared,
+    unsigned int sharedsize)
+{
+	struct hash    *hash;
+	struct prf     *prf;
+	struct prf_hash_ctx *prfctx;
+
+	switch (type) {
+	case PRF_HMAC:
+		hash = hash_get(subtype);
+		if (!hash) {
+			log_print("prf_alloc: unknown hash type %d", subtype);
+			return 0;
+		}
+		break;
+	default:
+		log_print("prf_alloc: unknown PRF type %d", type);
+		return 0;
+	}
+
+	prf = malloc(sizeof *prf);
+	if (!prf) {
+		log_error("prf_alloc: malloc (%lu) failed",
+		    (unsigned long)sizeof *prf);
+		return 0;
+	}
+	if (type == PRF_HMAC) {
+		/* Obtain needed memory.  */
+		prfctx = malloc(sizeof *prfctx);
+		if (!prfctx) {
+			log_error("prf_alloc: malloc (%lu) failed",
+			    (unsigned long)sizeof *prfctx);
+			goto cleanprf;
+		}
+		prf->prfctx = prfctx;
+
+		prfctx->ctx = malloc(hash->ctxsize);
+		if (!prfctx->ctx) {
+			log_error("prf_alloc: malloc (%d) failed",
+			    hash->ctxsize);
+			goto cleanprfctx;
+		}
+		prfctx->ctx2 = malloc(hash->ctxsize);
+		if (!prfctx->ctx2) {
+			log_error("prf_alloc: malloc (%d) failed",
+			    hash->ctxsize);
+			free(prfctx->ctx);
+			goto cleanprfctx;
+		}
+		prf->type = PRF_HMAC;
+		prf->blocksize = hash->hashsize;
+		prfctx->hash = hash;
+
+		/* Use the correct function pointers.  */
+		prf->Init = (void(*)(void *))prf_hash_init;
+		prf->Update = (void(*)(void *, unsigned char *,
+		    unsigned int))prf_hash_update;
+		prf->Final = (void(*)(unsigned char *, void *))prf_hash_final;
+
+		/* Init HMAC contexts.  */
+		hash->HMACInit(hash, shared, sharedsize);
+
+		/* Save contexts.  */
+		memcpy(prfctx->ctx, hash->ctx, hash->ctxsize);
+		memcpy(prfctx->ctx2, hash->ctx2, hash->ctxsize);
+	}
+	return prf;
+
+cleanprfctx:
+	free(prf->prfctx);
+cleanprf:
+	free(prf);
+	return 0;
+}
+
+/* Deallocate the PRF pointed to by PRF.  */
+void
+prf_free(struct prf *prf)
+{
+	struct prf_hash_ctx *prfctx = prf->prfctx;
+
+	if (prf->type == PRF_HMAC) {
+		free(prfctx->ctx2);
+		free(prfctx->ctx);
+	}
+	free(prf->prfctx);
+	free(prf);
+}