/* $OpenBSD: sshkey.h,v 1.31 2019/01/20 22:51:37 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 #ifdef WITH_OPENSSL #include #include # ifdef OPENSSL_HAS_ECC # include # include # else /* OPENSSL_HAS_ECC */ # define EC_KEY void # define EC_GROUP void # define EC_POINT void # endif /* OPENSSL_HAS_ECC */ #else /* WITH_OPENSSL */ # define BIGNUM void # 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_XMSS, KEY_XMSS_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 }; /* Private key serialisation formats, used on the wire */ enum sshkey_serialize_rep { SSHKEY_SERIALIZE_DEFAULT = 0, SSHKEY_SERIALIZE_STATE = 1, SSHKEY_SERIALIZE_FULL = 2, SSHKEY_SERIALIZE_INFO = 254, }; /* 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; char *signature_type; }; /* 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; char *xmss_name; char *xmss_filename; /* for state file updates */ void *xmss_state; /* depends on xmss_name, opaque */ u_char *xmss_sk; u_char *xmss_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); void sshkey_free(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_check_cert_sigtype(const struct sshkey *, const char *); 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_puts_opts(const struct sshkey *, struct sshbuf *, enum sshkey_serialize_rep); int sshkey_plain_to_blob(const struct sshkey *, u_char **, size_t *); int sshkey_putb_plain(const struct sshkey *, struct sshbuf *); 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); int sshkey_check_sigtype(const u_char *, size_t, const char *); const char *sshkey_sigalg_by_name(const char *); /* 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_serialize_opt(const struct sshkey *key, struct sshbuf *buf, enum sshkey_serialize_rep); 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_complete_crt_parameters(struct sshkey *, const BIGNUM *); /* stateful keys (e.g. XMSS) */ #ifdef NO_ATTRIBUTE_ON_PROTOTYPE_ARGS typedef void sshkey_printfn(const char *, ...); #else typedef void sshkey_printfn(const char *, ...) __attribute__((format(printf, 1, 2))); #endif int sshkey_set_filename(struct sshkey *, const char *); int sshkey_enable_maxsign(struct sshkey *, u_int32_t); u_int32_t sshkey_signatures_left(const struct sshkey *); int sshkey_forward_state(const struct sshkey *, u_int32_t, sshkey_printfn *); int sshkey_private_serialize_maxsign(const struct sshkey *key, struct sshbuf *buf, u_int32_t maxsign, sshkey_printfn *pr); #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); int ssh_xmss_sign(const struct sshkey *key, u_char **sigp, size_t *lenp, const u_char *data, size_t datalen, u_int compat); int ssh_xmss_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 */