DANE support structures, constructructors and accessors
Also tweak some of the code in demos/bio, to enable interactive
testing of BIO_s_accept's use of SSL_dup. Changed the sconnect
client to authenticate the server, which now exercises the new
SSL_set1_host() function.
Reviewed-by: Richard Levitte <levitte@openssl.org>
diff --git a/include/internal/dane.h b/include/internal/dane.h
new file mode 100644
index 0000000..cbe33f3
--- /dev/null
+++ b/include/internal/dane.h
@@ -0,0 +1,147 @@
+/* dane.h */
+/*
+ * Written by Viktor Dukhovni (viktor@openssl.org) for the OpenSSL project
+ * 2015.
+ */
+/* ====================================================================
+ * Copyright (c) 2015 The OpenSSL Project. 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.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ * software must display the following acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For written permission, please contact
+ * licensing@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ * nor may "OpenSSL" appear in their names without prior written
+ * permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED 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 OpenSSL PROJECT OR
+ * ITS 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.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com). This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+#ifndef HEADER_INTERNAL_DANE_H
+#define HEADER_INTERNAL_DANE_H
+
+#include <openssl/safestack.h>
+
+/*-
+ * Certificate usages:
+ * https://tools.ietf.org/html/rfc6698#section-2.1.1
+ */
+#define DANETLS_USAGE_PKIX_TA 0
+#define DANETLS_USAGE_PKIX_EE 1
+#define DANETLS_USAGE_DANE_TA 2
+#define DANETLS_USAGE_DANE_EE 3
+#define DANETLS_USAGE_LAST DANETLS_USAGE_DANE_EE
+
+/*-
+ * Selectors:
+ * https://tools.ietf.org/html/rfc6698#section-2.1.2
+ */
+#define DANETLS_SELECTOR_CERT 0
+#define DANETLS_SELECTOR_SPKI 1
+#define DANETLS_SELECTOR_LAST DANETLS_SELECTOR_SPKI
+
+/*-
+ * Matching types:
+ * https://tools.ietf.org/html/rfc6698#section-2.1.3
+ */
+#define DANETLS_MATCHING_FULL 0
+#define DANETLS_MATCHING_2256 1
+#define DANETLS_MATCHING_2512 2
+#define DANETLS_MATCHING_LAST DANETLS_MATCHING_2512
+
+typedef struct danetls_record_st {
+ uint8_t usage;
+ uint8_t selector;
+ uint8_t mtype;
+ unsigned char *data;
+ size_t dlen;
+ EVP_PKEY *spki;
+} danetls_record;
+
+/*
+ * Shared DANE context
+ */
+struct dane_ctx_st {
+ const EVP_MD **mdevp; /* mtype -> digest */
+ uint8_t *mdord; /* mtype -> preference */
+ uint8_t mdmax; /* highest supported mtype */
+};
+
+/*
+ * Per connection DANE state
+ */
+struct dane_st {
+ struct dane_ctx_st *dctx;
+ STACK_OF(danetls_record) *trecs;
+ STACK_OF(X509) *certs; /* DANE-TA(2) Cert(0) Full(0) certs */
+ danetls_record *mtlsa; /* Matching TLSA record */
+ X509 *mcert; /* DANE matched cert */
+ uint32_t umask; /* Usages present */
+ int mdpth; /* Depth of matched cert */
+ int pdpth; /* Depth of PKIX trust */
+};
+
+#define DANETLS_ENABLED(dane) ((dane) && ((dane)->trecs != NULL))
+
+#define DANETLS_USAGE_BIT(u) (((uint32_t)1) << u)
+
+#define DANETLS_PKIX_TA_MASK (DANETLS_USAGE_BIT(DANETLS_USAGE_PKIX_TA))
+#define DANETLS_PKIX_EE_MASK (DANETLS_USAGE_BIT(DANETLS_USAGE_PKIX_EE))
+#define DANETLS_DANE_TA_MASK (DANETLS_USAGE_BIT(DANETLS_USAGE_DANE_TA))
+#define DANETLS_DANE_EE_MASK (DANETLS_USAGE_BIT(DANETLS_USAGE_DANE_EE))
+
+#define DANETLS_PKIX_MASK (DANETLS_PKIX_TA_MASK | DANETLS_PKIX_EE_MASK)
+#define DANETLS_DANE_MASK (DANETLS_DANE_TA_MASK | DANETLS_DANE_EE_MASK)
+#define DANETLS_TA_MASK (DANETLS_PKIX_TA_MASK | DANETLS_DANE_TA_MASK)
+#define DANETLS_EE_MASK (DANETLS_PKIX_EE_MASK | DANETLS_DANE_EE_MASK)
+
+#define DANETLS_HAS_PKIX(dane) ((dane) && ((dane)->umask & DANETLS_PKIX_MASK))
+#define DANETLS_HAS_DANE(dane) ((dane) && ((dane)->umask & DANETLS_DANE_MASK))
+#define DANETLS_HAS_TA(dane) ((dane) && ((dane)->umask & DANETLS_TA_MASK))
+#define DANETLS_HAS_EE(dane) ((dane) && ((dane)->umask & DANETLS_EE_MASK))
+
+#define DANETLS_HAS_PKIX_TA(dane) ((dane)&&((dane)->umask & DANETLS_PKIX_TA_MASK))
+#define DANETLS_HAS_PKIX_EE(dane) ((dane)&&((dane)->umask & DANETLS_PKIX_EE_MASK))
+#define DANETLS_HAS_DANE_TA(dane) ((dane)&&((dane)->umask & DANETLS_DANE_TA_MASK))
+#define DANETLS_HAS_DANE_EE(dane) ((dane)&&((dane)->umask & DANETLS_DANE_EE_MASK))
+
+#endif /* HEADER_INTERNAL_DANE_H */
