sshkey.h - platform/external/openssh - Gitiles

 /* $OpenBSD: sshkey.h,v 1.23 2017/12/18 02:25:15 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>
 # ifdef OPENSSL_HAS_ECC
 #  include <openssl/ec.h>
 # else /* OPENSSL_HAS_ECC */
 #  define EC_KEY	void
 #  define EC_GROUP	void
 #  define EC_POINT	void
 # endif /* OPENSSL_HAS_ECC */
 #else /* WITH_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	1024
 #define SSH_KEY_MAX_SIGN_DATA_SIZE	(1 << 20)

 struct sshbuf;

 /* Key types */
 enum sshkey_types {
 	KEY_RSA,
 	KEY_DSA,
 	KEY_ECDSA,
 	KEY_ED25519,
 	KEY_RSA_CERT,
 	KEY_DSA_CERT,
 	KEY_ECDSA_CERT,
 	KEY_ED25519_CERT,
 	KEY_UNSPEC
 };

 /* Default fingerprint hash */
 #define SSH_FP_HASH_DEFAULT	SSH_DIGEST_SHA256

 /* Fingerprint representation formats */
 enum sshkey_fp_rep {
 	SSH_FP_DEFAULT = 0,
 	SSH_FP_HEX,
 	SSH_FP_BASE64,
 	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 *,
     int, enum sshkey_fp_rep);
 int		 sshkey_fingerprint_raw(const struct sshkey *k,
     int, u_char **retp, size_t *lenp);
 const char	*sshkey_type(const struct sshkey *);
 const char	*sshkey_cert_type(const struct sshkey *);
 int		 sshkey_format_text(const struct sshkey *, struct sshbuf *);
 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	 sshkey_drop_cert(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 **);
 size_t	 sshkey_format_cert_validity(const struct sshkey_cert *,
     char *, size_t) __attribute__((__bounded__(__string__, 2, 3)));

 int	 sshkey_certify(struct sshkey *, struct sshkey *, const char *);
 /* Variant allowing use of a custom signature function (e.g. for ssh-agent) */
 typedef int sshkey_certify_signer(const struct sshkey *, u_char **, size_t *,
     const u_char *, size_t, const char *, u_int, void *);
 int	 sshkey_certify_custom(struct sshkey *, struct sshkey *, const char *,
     sshkey_certify_signer *, void *);

 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 *, int);
 char		*sshkey_alg_list(int, int, int, char);

 int	 sshkey_from_blob(const u_char *, size_t, struct sshkey **);
 int	 sshkey_fromb(struct sshbuf *, struct sshkey **);
 int	 sshkey_froms(struct sshbuf *, struct sshkey **);
 int	 sshkey_to_blob(const struct sshkey *, u_char **, size_t *);
 int	 sshkey_to_base64(const struct sshkey *, char **);
 int	 sshkey_putb(const struct sshkey *, struct sshbuf *);
 int	 sshkey_puts(const struct sshkey *, struct sshbuf *);
 int	 sshkey_plain_to_blob(const struct sshkey *, u_char **, size_t *);
 int	 sshkey_putb_plain(const struct sshkey *, struct sshbuf *);

 int	 sshkey_sigtype(const u_char *, size_t, char **);
 int	 sshkey_sign(const struct sshkey *, u_char **, size_t *,
     const u_char *, size_t, const char *, u_int);
 int	 sshkey_verify(const struct sshkey *, const u_char *, size_t,
     const u_char *, size_t, const char *, 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_private_fileblob(struct sshbuf *buffer,
     const char *passphrase, struct sshkey **keyp, char **commentp);
 int	sshkey_parse_private_fileblob_type(struct sshbuf *blob, int type,
     const char *passphrase, struct sshkey **keyp, char **commentp);

 /* XXX should be internal, but used by ssh-keygen */
 int ssh_rsa_generate_additional_parameters(struct sshkey *);

 #ifdef SSHKEY_INTERNAL
 int ssh_rsa_sign(const struct sshkey *key,
     u_char **sigp, size_t *lenp, const u_char *data, size_t datalen,
     const char *ident);
 int ssh_rsa_verify(const struct sshkey *key,
     const u_char *sig, size_t siglen, const u_char *data, size_t datalen,
     const char *alg);
 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

 #if !defined(WITH_OPENSSL)
 # undef RSA
 # undef DSA
 # undef EC_KEY
 # undef EC_GROUP
 # undef EC_POINT
 #elif !defined(OPENSSL_HAS_ECC)
 # undef EC_KEY
 # undef EC_GROUP
 # undef EC_POINT
 #endif

 #endif /* SSHKEY_H */
	/* $OpenBSD: sshkey.h,v 1.23 2017/12/18 02:25:15 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>
	# ifdef OPENSSL_HAS_ECC
	# include <openssl/ec.h>
	# else /* OPENSSL_HAS_ECC */
	# define EC_KEY void
	# define EC_GROUP void
	# define EC_POINT void
	# endif /* OPENSSL_HAS_ECC */
	#else /* WITH_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 1024
	#define SSH_KEY_MAX_SIGN_DATA_SIZE (1 << 20)

	struct sshbuf;

	/* Key types */
	enum sshkey_types {
	KEY_RSA,
	KEY_DSA,
	KEY_ECDSA,
	KEY_ED25519,
	KEY_RSA_CERT,
	KEY_DSA_CERT,
	KEY_ECDSA_CERT,
	KEY_ED25519_CERT,
	KEY_UNSPEC
	};

	/* Default fingerprint hash */
	#define SSH_FP_HASH_DEFAULT SSH_DIGEST_SHA256

	/* Fingerprint representation formats */
	enum sshkey_fp_rep {
	SSH_FP_DEFAULT = 0,
	SSH_FP_HEX,
	SSH_FP_BASE64,
	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 ,
	int, enum sshkey_fp_rep);
	int sshkey_fingerprint_raw(const struct sshkey *k,
	int, u_char *retp, size_t lenp);
	const char sshkey_type(const struct sshkey );
	const char sshkey_cert_type(const struct sshkey );
	int sshkey_format_text(const struct sshkey , struct sshbuf );
	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 sshkey_drop_cert(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 *);
	size_t sshkey_format_cert_validity(const struct sshkey_cert *,
	char *, size_t) __attribute__((__bounded__(__string__, 2, 3)));

	int sshkey_certify(struct sshkey , struct sshkey , const char *);
	/* Variant allowing use of a custom signature function (e.g. for ssh-agent) */
	typedef int sshkey_certify_signer(const struct sshkey , u_char , size_t ,
	const u_char , size_t, const char , u_int, void *);
	int sshkey_certify_custom(struct sshkey , struct sshkey , const char *,
	sshkey_certify_signer , void );

	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 *, int);
	char *sshkey_alg_list(int, int, int, char);

	int sshkey_from_blob(const u_char , size_t, struct sshkey *);
	int sshkey_fromb(struct sshbuf , struct sshkey *);
	int sshkey_froms(struct sshbuf , struct sshkey *);
	int sshkey_to_blob(const struct sshkey , u_char , size_t );
	int sshkey_to_base64(const struct sshkey , char *);
	int sshkey_putb(const struct sshkey , struct sshbuf );
	int sshkey_puts(const struct sshkey , struct sshbuf );
	int sshkey_plain_to_blob(const struct sshkey , u_char , size_t );
	int sshkey_putb_plain(const struct sshkey , struct sshbuf );

	int sshkey_sigtype(const u_char , size_t, char *);
	int sshkey_sign(const struct sshkey , u_char , size_t ,
	const u_char , size_t, const char , u_int);
	int sshkey_verify(const struct sshkey , const u_char , size_t,
	const u_char , size_t, const char , 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_private_fileblob(struct sshbuf *buffer,
	const char passphrase, struct sshkey keyp, char *commentp);
	int sshkey_parse_private_fileblob_type(struct sshbuf *blob, int type,
	const char passphrase, struct sshkey keyp, char *commentp);

	/* XXX should be internal, but used by ssh-keygen */
	int ssh_rsa_generate_additional_parameters(struct sshkey *);

	#ifdef SSHKEY_INTERNAL
	int ssh_rsa_sign(const struct sshkey *key,
	u_char *sigp, size_t lenp, const u_char *data, size_t datalen,
	const char *ident);
	int ssh_rsa_verify(const struct sshkey *key,
	const u_char sig, size_t siglen, const u_char data, size_t datalen,
	const char *alg);
	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

	#if !defined(WITH_OPENSSL)
	# undef RSA
	# undef DSA
	# undef EC_KEY
	# undef EC_GROUP
	# undef EC_POINT
	#elif !defined(OPENSSL_HAS_ECC)
	# undef EC_KEY
	# undef EC_GROUP
	# undef EC_POINT
	#endif

	#endif /* SSHKEY_H */