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+/* Copyright (C) 2018 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#pragma once
+
+#include <gnutls/gnutls.h>
+
+#include "libdnssec/binary.h"
+
+/*!
+ * Create GnuTLS X.509 private key from unencrypted PEM data.
+ *
+ * \param[in] pem PEM binary data.
+ * \param[out] key Resulting private key.
+ *
+ * \return Error code, DNSSEC_EOK if successful.
+ */
+int pem_x509(const dnssec_binary_t *pem, gnutls_x509_privkey_t *key);
+
+/*!
+ * Create GnuTLS private key from unencrypted PEM data.
+ *
+ * \param[in] pem PEM binary data.
+ * \param[out] key Resulting private key.
+ *
+ * \return Error code, DNSSEC_EOK if successful.
+ */
+int pem_privkey(const dnssec_binary_t *pem, gnutls_privkey_t *key);
+
+/*!
+ * Generate a private key and export it in the PEM format.
+ *
+ * \param[in] algorithm Algorithm to be used.
+ * \param[in] bits Size of the key to be generated.
+ * \param[out] pem Generated key in unencrypted PEM format.
+ * \param[out] id Key ID of the generated key.
+ *
+ * \return Error code, DNSSEC_EOK if successful.
+ */
+int pem_generate(gnutls_pk_algorithm_t algorithm, unsigned bits,
+ dnssec_binary_t *pem, char **id);
+
+/*!
+ * Export GnuTLS X.509 private key to PEM binary.
+ *
+ * \param[in] key Key to be exported.
+ * \param[out] pem Generated key in unencrypted PEM format.
+ *
+ * \return Error code, DNSSEC_EOK if successful.
+ */
+int pem_from_x509(gnutls_x509_privkey_t key, dnssec_binary_t *pem);
+
+/*!
+ * Get key ID of a private key in PEM format.
+ *
+ * \param[in] pem Key in unencrypted PEM format.
+ * \param[out] id ID of the key.
+ *
+ * \return Error code, DNSSEC_EOK if successful.
+ */
+int pem_keyid(const dnssec_binary_t *pem, char **id);