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authorOthmar Gsenger <otti@anytun.org>2007-12-27 11:13:13 +0000
committerOthmar Gsenger <otti@anytun.org>2007-12-27 11:13:13 +0000
commit6dc4f1912caf7f01f4b977ff8aaa50be61db2aba (patch)
treed7a281c430052e04156265d9ab3108c631360a5e /keyexchange/isakmpd-20041012/prf.c
parentremoved old isakmpd (diff)
adden new isakmpd
Diffstat (limited to 'keyexchange/isakmpd-20041012/prf.c')
-rw-r--r--keyexchange/isakmpd-20041012/prf.c161
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);
+}