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externals/libressl/crypto/x509/x509_issuer_cache.h

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+/* $OpenBSD: x509_issuer_cache.h,v 1.1 2020/09/11 14:30:51 beck Exp $ */
+/*
+ * Copyright (c) 2020 Bob Beck <beck@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/* x509_issuer_cache */
+#ifndef HEADER_X509_ISSUER_CACHE_H
+#define HEADER_X509_ISSUER_CACHE_H
+
+#include <sys/tree.h>
+#include <sys/queue.h>
+
+#include <openssl/x509.h>
+
+__BEGIN_HIDDEN_DECLS
+
+struct x509_issuer {
+	RB_ENTRY(x509_issuer) entry;
+	TAILQ_ENTRY(x509_issuer) queue;	/* LRU of entries */
+	/* parent_md and child_md must point to EVP_MAX_MD_SIZE of memory */
+	unsigned char *parent_md;
+	unsigned char *child_md;
+	int valid;			/* Result of signature validation. */
+};
+
+#define X509_ISSUER_CACHE_MAX 40000	/* Approx 7.5 MB, entries 200 bytes */
+
+int x509_issuer_cache_set_max(size_t max);
+int x509_issuer_cache_find(unsigned char *parent_md, unsigned char *child_md);
+void x509_issuer_cache_add(unsigned char *parent_md, unsigned char *child_md,
+    int valid);
+
+__END_HIDDEN_DECLS
+
+#endif