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+/* $OpenBSD: sshkey.h,v 1.1 2014/06/24 01:16:58 djm Exp $ */
+
+/*
+ * Copyright (c) 2000, 2001 Markus Friedl. 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.
+ */
+#ifndef SSHKEY_H
+#define SSHKEY_H
+
+#include <sys/types.h>
+
+#ifdef WITH_OPENSSL
+#include <openssl/rsa.h>
+#include <openssl/dsa.h>
+#include <openssl/ec.h>
+#else /* OPENSSL */
+#define RSA void
+#define DSA void
+#define EC_KEY void
+#define EC_GROUP void
+#define EC_POINT void
+#endif /* WITH_OPENSSL */
+
+#define SSH_RSA_MINIMUM_MODULUS_SIZE 768
+#define SSH_KEY_MAX_SIGN_DATA_SIZE (1 << 20)
+
+struct sshbuf;
+
+/* Key types */
+enum sshkey_types {
+ KEY_RSA1,
+ KEY_RSA,
+ KEY_DSA,
+ KEY_ECDSA,
+ KEY_ED25519,
+ KEY_RSA_CERT,
+ KEY_DSA_CERT,
+ KEY_ECDSA_CERT,
+ KEY_ED25519_CERT,
+ KEY_RSA_CERT_V00,
+ KEY_DSA_CERT_V00,
+ KEY_UNSPEC
+};
+
+/* Fingerprint hash algorithms */
+enum sshkey_fp_type {
+ SSH_FP_SHA1,
+ SSH_FP_MD5,
+ SSH_FP_SHA256
+};
+
+/* Fingerprint representation formats */
+enum sshkey_fp_rep {
+ SSH_FP_HEX,
+ SSH_FP_BUBBLEBABBLE,
+ SSH_FP_RANDOMART
+};
+
+/* key is stored in external hardware */
+#define SSHKEY_FLAG_EXT 0x0001
+
+#define SSHKEY_CERT_MAX_PRINCIPALS 256
+/* XXX opaquify? */
+struct sshkey_cert {
+ struct sshbuf *certblob; /* Kept around for use on wire */
+ u_int type; /* SSH2_CERT_TYPE_USER or SSH2_CERT_TYPE_HOST */
+ u_int64_t serial;
+ char *key_id;
+ u_int nprincipals;
+ char **principals;
+ u_int64_t valid_after, valid_before;
+ struct sshbuf *critical;
+ struct sshbuf *extensions;
+ struct sshkey *signature_key;
+};
+
+/* XXX opaquify? */
+struct sshkey {
+ int type;
+ int flags;
+ RSA *rsa;
+ DSA *dsa;
+ int ecdsa_nid; /* NID of curve */
+ EC_KEY *ecdsa;
+ u_char *ed25519_sk;
+ u_char *ed25519_pk;
+ struct sshkey_cert *cert;
+};
+
+#define ED25519_SK_SZ crypto_sign_ed25519_SECRETKEYBYTES
+#define ED25519_PK_SZ crypto_sign_ed25519_PUBLICKEYBYTES
+
+struct sshkey *sshkey_new(int);
+int sshkey_add_private(struct sshkey *);
+struct sshkey *sshkey_new_private(int);
+void sshkey_free(struct sshkey *);
+int sshkey_demote(const struct sshkey *, struct sshkey **);
+int sshkey_equal_public(const struct sshkey *,
+ const struct sshkey *);
+int sshkey_equal(const struct sshkey *, const struct sshkey *);
+char *sshkey_fingerprint(const struct sshkey *,
+ enum sshkey_fp_type, enum sshkey_fp_rep);
+int sshkey_fingerprint_raw(const struct sshkey *k,
+ enum sshkey_fp_type dgst_type, u_char **retp, size_t *lenp);
+const char *sshkey_type(const struct sshkey *);
+const char *sshkey_cert_type(const struct sshkey *);
+int sshkey_write(const struct sshkey *, FILE *);
+int sshkey_read(struct sshkey *, char **);
+u_int sshkey_size(const struct sshkey *);
+
+int sshkey_generate(int type, u_int bits, struct sshkey **keyp);
+int sshkey_from_private(const struct sshkey *, struct sshkey **);
+int sshkey_type_from_name(const char *);
+int sshkey_is_cert(const struct sshkey *);
+int sshkey_type_is_cert(int);
+int sshkey_type_plain(int);
+int sshkey_to_certified(struct sshkey *, int);
+int sshkey_drop_cert(struct sshkey *);
+int sshkey_certify(struct sshkey *, struct sshkey *);
+int sshkey_cert_copy(const struct sshkey *, struct sshkey *);
+int sshkey_cert_check_authority(const struct sshkey *, int, int,
+ const char *, const char **);
+int sshkey_cert_is_legacy(const struct sshkey *);
+
+int sshkey_ecdsa_nid_from_name(const char *);
+int sshkey_curve_name_to_nid(const char *);
+const char * sshkey_curve_nid_to_name(int);
+u_int sshkey_curve_nid_to_bits(int);
+int sshkey_ecdsa_bits_to_nid(int);
+int sshkey_ecdsa_key_to_nid(EC_KEY *);
+int sshkey_ec_nid_to_hash_alg(int nid);
+int sshkey_ec_validate_public(const EC_GROUP *, const EC_POINT *);
+int sshkey_ec_validate_private(const EC_KEY *);
+const char *sshkey_ssh_name(const struct sshkey *);
+const char *sshkey_ssh_name_plain(const struct sshkey *);
+int sshkey_names_valid2(const char *);
+char *key_alg_list(int, int);
+
+int sshkey_from_blob(const u_char *, size_t, struct sshkey **);
+int sshkey_to_blob_buf(const struct sshkey *, struct sshbuf *);
+int sshkey_to_blob(const struct sshkey *, u_char **, size_t *);
+int sshkey_plain_to_blob_buf(const struct sshkey *, struct sshbuf *);
+int sshkey_plain_to_blob(const struct sshkey *, u_char **, size_t *);
+
+int sshkey_sign(const struct sshkey *, u_char **, size_t *,
+ const u_char *, size_t, u_int);
+int sshkey_verify(const struct sshkey *, const u_char *, size_t,
+ const u_char *, size_t, u_int);
+
+/* for debug */
+void sshkey_dump_ec_point(const EC_GROUP *, const EC_POINT *);
+void sshkey_dump_ec_key(const EC_KEY *);
+
+/* private key parsing and serialisation */
+int sshkey_private_serialize(const struct sshkey *key, struct sshbuf *buf);
+int sshkey_private_deserialize(struct sshbuf *buf, struct sshkey **keyp);
+
+/* private key file format parsing and serialisation */
+int sshkey_private_to_fileblob(struct sshkey *key, struct sshbuf *blob,
+ const char *passphrase, const char *comment,
+ int force_new_format, const char *new_format_cipher, int new_format_rounds);
+int sshkey_parse_public_rsa1_fileblob(struct sshbuf *blob,
+ struct sshkey **keyp, char **commentp);
+int sshkey_parse_private_pem_fileblob(struct sshbuf *blob, int type,
+ const char *passphrase, struct sshkey **keyp, char **commentp);
+int sshkey_parse_private_fileblob(struct sshbuf *buffer,
+ const char *passphrase, const char *filename, struct sshkey **keyp,
+ char **commentp);
+int sshkey_parse_private_fileblob_type(struct sshbuf *blob, int type,
+ const char *passphrase, struct sshkey **keyp, char **commentp);
+
+#ifdef SSHKEY_INTERNAL
+int ssh_rsa_sign(const struct sshkey *key, u_char **sigp, size_t *lenp,
+ const u_char *data, size_t datalen, u_int compat);
+int ssh_rsa_verify(const struct sshkey *key,
+ const u_char *signature, size_t signaturelen,
+ const u_char *data, size_t datalen, u_int compat);
+int ssh_dss_sign(const struct sshkey *key, u_char **sigp, size_t *lenp,
+ const u_char *data, size_t datalen, u_int compat);
+int ssh_dss_verify(const struct sshkey *key,
+ const u_char *signature, size_t signaturelen,
+ const u_char *data, size_t datalen, u_int compat);
+int ssh_ecdsa_sign(const struct sshkey *key, u_char **sigp, size_t *lenp,
+ const u_char *data, size_t datalen, u_int compat);
+int ssh_ecdsa_verify(const struct sshkey *key,
+ const u_char *signature, size_t signaturelen,
+ const u_char *data, size_t datalen, u_int compat);
+int ssh_ed25519_sign(const struct sshkey *key, u_char **sigp, size_t *lenp,
+ const u_char *data, size_t datalen, u_int compat);
+int ssh_ed25519_verify(const struct sshkey *key,
+ const u_char *signature, size_t signaturelen,
+ const u_char *data, size_t datalen, u_int compat);
+#endif
+
+#ifndef WITH_OPENSSL
+#undef RSA
+#undef DSA
+#undef EC_KEY
+#undef EC_GROUP
+#undef EC_POINT
+#endif /* WITH_OPENSSL */
+
+#endif /* SSHKEY_H */