Merge remote-tracking branch 'origin/master'

# Conflicts:
#	README.md

crypto/ct/ct_x509v3.c

@@ -0,0 +1,60 @@
+/*
+ * Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#ifdef OPENSSL_NO_CT
+# error "CT is disabled"
+#endif
+
+#include "ct_locl.h"
+
+static char *i2s_poison(const X509V3_EXT_METHOD *method, void *val)
+{
+    return OPENSSL_strdup("NULL");
+}
+
+static void *s2i_poison(const X509V3_EXT_METHOD *method, X509V3_CTX *ctx, const char *str)
+{
+   return ASN1_NULL_new();
+}
+
+static int i2r_SCT_LIST(X509V3_EXT_METHOD *method, STACK_OF(SCT) *sct_list,
+                 BIO *out, int indent)
+{
+    SCT_LIST_print(sct_list, out, indent, "\n", NULL);
+    return 1;
+}
+
+/* Handlers for X509v3/OCSP Certificate Transparency extensions */
+const X509V3_EXT_METHOD v3_ct_scts[3] = {
+    /* X509v3 extension in certificates that contains SCTs */
+    { NID_ct_precert_scts, 0, NULL,
+    NULL, (X509V3_EXT_FREE)SCT_LIST_free,
+    (X509V3_EXT_D2I)d2i_SCT_LIST, (X509V3_EXT_I2D)i2d_SCT_LIST,
+    NULL, NULL,
+    NULL, NULL,
+    (X509V3_EXT_I2R)i2r_SCT_LIST, NULL,
+    NULL },
+
+    /* X509v3 extension to mark a certificate as a pre-certificate */
+    { NID_ct_precert_poison, 0, ASN1_ITEM_ref(ASN1_NULL),
+    NULL, NULL, NULL, NULL,
+    i2s_poison, s2i_poison,
+    NULL, NULL,
+    NULL, NULL,
+    NULL },
+
+    /* OCSP extension that contains SCTs */
+    { NID_ct_cert_scts, 0, NULL,
+    0, (X509V3_EXT_FREE)SCT_LIST_free,
+    (X509V3_EXT_D2I)d2i_SCT_LIST, (X509V3_EXT_I2D)i2d_SCT_LIST,
+    NULL, NULL,
+    NULL, NULL,
+    (X509V3_EXT_I2R)i2r_SCT_LIST, NULL,
+    NULL },
+};