1 /* $OpenBSD: sshkey.h,v 1.31 2019/01/20 22:51:37 djm Exp $ */
4 * Copyright (c) 2000, 2001 Markus Friedl. All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 #include <sys/types.h>
32 #include <openssl/rsa.h>
33 #include <openssl/dsa.h>
34 # ifdef OPENSSL_HAS_ECC
35 # include <openssl/ec.h>
36 # include <openssl/ecdsa.h>
37 # else /* OPENSSL_HAS_ECC */
39 # define EC_GROUP void
40 # define EC_POINT void
41 # endif /* OPENSSL_HAS_ECC */
42 #else /* WITH_OPENSSL */
47 # define EC_GROUP void
48 # define EC_POINT void
49 #endif /* WITH_OPENSSL */
51 #define SSH_RSA_MINIMUM_MODULUS_SIZE 1024
52 #define SSH_KEY_MAX_SIGN_DATA_SIZE (1 << 20)
71 /* Default fingerprint hash */
72 #define SSH_FP_HASH_DEFAULT SSH_DIGEST_SHA256
74 /* Fingerprint representation formats */
83 /* Private key serialisation formats, used on the wire */
84 enum sshkey_serialize_rep {
85 SSHKEY_SERIALIZE_DEFAULT = 0,
86 SSHKEY_SERIALIZE_STATE = 1,
87 SSHKEY_SERIALIZE_FULL = 2,
88 SSHKEY_SERIALIZE_INFO = 254,
91 /* key is stored in external hardware */
92 #define SSHKEY_FLAG_EXT 0x0001
94 #define SSHKEY_CERT_MAX_PRINCIPALS 256
97 struct sshbuf *certblob; /* Kept around for use on wire */
98 u_int type; /* SSH2_CERT_TYPE_USER or SSH2_CERT_TYPE_HOST */
103 u_int64_t valid_after, valid_before;
104 struct sshbuf *critical;
105 struct sshbuf *extensions;
106 struct sshkey *signature_key;
107 char *signature_type;
116 int ecdsa_nid; /* NID of curve */
121 char *xmss_filename; /* for state file updates */
122 void *xmss_state; /* depends on xmss_name, opaque */
125 struct sshkey_cert *cert;
128 #define ED25519_SK_SZ crypto_sign_ed25519_SECRETKEYBYTES
129 #define ED25519_PK_SZ crypto_sign_ed25519_PUBLICKEYBYTES
131 struct sshkey *sshkey_new(int);
132 void sshkey_free(struct sshkey *);
133 int sshkey_equal_public(const struct sshkey *,
134 const struct sshkey *);
135 int sshkey_equal(const struct sshkey *, const struct sshkey *);
136 char *sshkey_fingerprint(const struct sshkey *,
137 int, enum sshkey_fp_rep);
138 int sshkey_fingerprint_raw(const struct sshkey *k,
139 int, u_char **retp, size_t *lenp);
140 const char *sshkey_type(const struct sshkey *);
141 const char *sshkey_cert_type(const struct sshkey *);
142 int sshkey_format_text(const struct sshkey *, struct sshbuf *);
143 int sshkey_write(const struct sshkey *, FILE *);
144 int sshkey_read(struct sshkey *, char **);
145 u_int sshkey_size(const struct sshkey *);
147 int sshkey_generate(int type, u_int bits, struct sshkey **keyp);
148 int sshkey_from_private(const struct sshkey *, struct sshkey **);
149 int sshkey_type_from_name(const char *);
150 int sshkey_is_cert(const struct sshkey *);
151 int sshkey_type_is_cert(int);
152 int sshkey_type_plain(int);
153 int sshkey_to_certified(struct sshkey *);
154 int sshkey_drop_cert(struct sshkey *);
155 int sshkey_cert_copy(const struct sshkey *, struct sshkey *);
156 int sshkey_cert_check_authority(const struct sshkey *, int, int,
157 const char *, const char **);
158 size_t sshkey_format_cert_validity(const struct sshkey_cert *,
159 char *, size_t) __attribute__((__bounded__(__string__, 2, 3)));
160 int sshkey_check_cert_sigtype(const struct sshkey *, const char *);
162 int sshkey_certify(struct sshkey *, struct sshkey *, const char *);
163 /* Variant allowing use of a custom signature function (e.g. for ssh-agent) */
164 typedef int sshkey_certify_signer(const struct sshkey *, u_char **, size_t *,
165 const u_char *, size_t, const char *, u_int, void *);
166 int sshkey_certify_custom(struct sshkey *, struct sshkey *, const char *,
167 sshkey_certify_signer *, void *);
169 int sshkey_ecdsa_nid_from_name(const char *);
170 int sshkey_curve_name_to_nid(const char *);
171 const char * sshkey_curve_nid_to_name(int);
172 u_int sshkey_curve_nid_to_bits(int);
173 int sshkey_ecdsa_bits_to_nid(int);
174 int sshkey_ecdsa_key_to_nid(EC_KEY *);
175 int sshkey_ec_nid_to_hash_alg(int nid);
176 int sshkey_ec_validate_public(const EC_GROUP *, const EC_POINT *);
177 int sshkey_ec_validate_private(const EC_KEY *);
178 const char *sshkey_ssh_name(const struct sshkey *);
179 const char *sshkey_ssh_name_plain(const struct sshkey *);
180 int sshkey_names_valid2(const char *, int);
181 char *sshkey_alg_list(int, int, int, char);
183 int sshkey_from_blob(const u_char *, size_t, struct sshkey **);
184 int sshkey_fromb(struct sshbuf *, struct sshkey **);
185 int sshkey_froms(struct sshbuf *, struct sshkey **);
186 int sshkey_to_blob(const struct sshkey *, u_char **, size_t *);
187 int sshkey_to_base64(const struct sshkey *, char **);
188 int sshkey_putb(const struct sshkey *, struct sshbuf *);
189 int sshkey_puts(const struct sshkey *, struct sshbuf *);
190 int sshkey_puts_opts(const struct sshkey *, struct sshbuf *,
191 enum sshkey_serialize_rep);
192 int sshkey_plain_to_blob(const struct sshkey *, u_char **, size_t *);
193 int sshkey_putb_plain(const struct sshkey *, struct sshbuf *);
195 int sshkey_sign(const struct sshkey *, u_char **, size_t *,
196 const u_char *, size_t, const char *, u_int);
197 int sshkey_verify(const struct sshkey *, const u_char *, size_t,
198 const u_char *, size_t, const char *, u_int);
199 int sshkey_check_sigtype(const u_char *, size_t, const char *);
200 const char *sshkey_sigalg_by_name(const char *);
203 void sshkey_dump_ec_point(const EC_GROUP *, const EC_POINT *);
204 void sshkey_dump_ec_key(const EC_KEY *);
206 /* private key parsing and serialisation */
207 int sshkey_private_serialize(const struct sshkey *key, struct sshbuf *buf);
208 int sshkey_private_serialize_opt(const struct sshkey *key, struct sshbuf *buf,
209 enum sshkey_serialize_rep);
210 int sshkey_private_deserialize(struct sshbuf *buf, struct sshkey **keyp);
212 /* private key file format parsing and serialisation */
213 int sshkey_private_to_fileblob(struct sshkey *key, struct sshbuf *blob,
214 const char *passphrase, const char *comment,
215 int force_new_format, const char *new_format_cipher, int new_format_rounds);
216 int sshkey_parse_private_fileblob(struct sshbuf *buffer,
217 const char *passphrase, struct sshkey **keyp, char **commentp);
218 int sshkey_parse_private_fileblob_type(struct sshbuf *blob, int type,
219 const char *passphrase, struct sshkey **keyp, char **commentp);
221 /* XXX should be internal, but used by ssh-keygen */
222 int ssh_rsa_complete_crt_parameters(struct sshkey *, const BIGNUM *);
224 /* stateful keys (e.g. XMSS) */
225 #ifdef NO_ATTRIBUTE_ON_PROTOTYPE_ARGS
226 typedef void sshkey_printfn(const char *, ...);
228 typedef void sshkey_printfn(const char *, ...) __attribute__((format(printf, 1, 2)));
230 int sshkey_set_filename(struct sshkey *, const char *);
231 int sshkey_enable_maxsign(struct sshkey *, u_int32_t);
232 u_int32_t sshkey_signatures_left(const struct sshkey *);
233 int sshkey_forward_state(const struct sshkey *, u_int32_t, sshkey_printfn *);
234 int sshkey_private_serialize_maxsign(const struct sshkey *key, struct sshbuf *buf,
235 u_int32_t maxsign, sshkey_printfn *pr);
237 #ifdef SSHKEY_INTERNAL
238 int ssh_rsa_sign(const struct sshkey *key,
239 u_char **sigp, size_t *lenp, const u_char *data, size_t datalen,
241 int ssh_rsa_verify(const struct sshkey *key,
242 const u_char *sig, size_t siglen, const u_char *data, size_t datalen,
244 int ssh_dss_sign(const struct sshkey *key, u_char **sigp, size_t *lenp,
245 const u_char *data, size_t datalen, u_int compat);
246 int ssh_dss_verify(const struct sshkey *key,
247 const u_char *signature, size_t signaturelen,
248 const u_char *data, size_t datalen, u_int compat);
249 int ssh_ecdsa_sign(const struct sshkey *key, u_char **sigp, size_t *lenp,
250 const u_char *data, size_t datalen, u_int compat);
251 int ssh_ecdsa_verify(const struct sshkey *key,
252 const u_char *signature, size_t signaturelen,
253 const u_char *data, size_t datalen, u_int compat);
254 int ssh_ed25519_sign(const struct sshkey *key, u_char **sigp, size_t *lenp,
255 const u_char *data, size_t datalen, u_int compat);
256 int ssh_ed25519_verify(const struct sshkey *key,
257 const u_char *signature, size_t signaturelen,
258 const u_char *data, size_t datalen, u_int compat);
259 int ssh_xmss_sign(const struct sshkey *key, u_char **sigp, size_t *lenp,
260 const u_char *data, size_t datalen, u_int compat);
261 int ssh_xmss_verify(const struct sshkey *key,
262 const u_char *signature, size_t signaturelen,
263 const u_char *data, size_t datalen, u_int compat);
266 #if !defined(WITH_OPENSSL)
272 #elif !defined(OPENSSL_HAS_ECC)
278 #endif /* SSHKEY_H */