2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
13 # include <openssl/opensslconf.h>
15 # ifndef OPENSSL_NO_DH
16 # include <openssl/e_os2.h>
17 # include <openssl/bio.h>
18 # include <openssl/asn1.h>
19 # include <openssl/ossl_typ.h>
20 # if OPENSSL_API_COMPAT < 0x10100000L
21 # include <openssl/bn.h>
28 # ifndef OPENSSL_DH_MAX_MODULUS_BITS
29 # define OPENSSL_DH_MAX_MODULUS_BITS 10000
32 # define OPENSSL_DH_FIPS_MIN_MODULUS_BITS 1024
34 # define DH_FLAG_CACHE_MONT_P 0x01
36 # if OPENSSL_API_COMPAT < 0x10100000L
38 * Does nothing. Previously this switched off constant time behaviour.
40 # define DH_FLAG_NO_EXP_CONSTTIME 0x00
44 * If this flag is set the DH method is FIPS compliant and can be used in
45 * FIPS mode. This is set in the validated module method. If an application
46 * sets this flag in its own methods it is its responsibility to ensure the
47 * result is compliant.
50 # define DH_FLAG_FIPS_METHOD 0x0400
53 * If this flag is set the operations normally disabled in FIPS mode are
54 * permitted it is then the applications responsibility to ensure that the
58 # define DH_FLAG_NON_FIPS_ALLOW 0x0400
60 /* Already defined in ossl_typ.h */
61 /* typedef struct dh_st DH; */
62 /* typedef struct dh_method DH_METHOD; */
64 DECLARE_ASN1_ITEM(DHparams)
66 # define DH_GENERATOR_2 2
67 /* #define DH_GENERATOR_3 3 */
68 # define DH_GENERATOR_5 5
70 /* DH_check error codes */
71 # define DH_CHECK_P_NOT_PRIME 0x01
72 # define DH_CHECK_P_NOT_SAFE_PRIME 0x02
73 # define DH_UNABLE_TO_CHECK_GENERATOR 0x04
74 # define DH_NOT_SUITABLE_GENERATOR 0x08
75 # define DH_CHECK_Q_NOT_PRIME 0x10
76 # define DH_CHECK_INVALID_Q_VALUE 0x20
77 # define DH_CHECK_INVALID_J_VALUE 0x40
79 /* DH_check_pub_key error codes */
80 # define DH_CHECK_PUBKEY_TOO_SMALL 0x01
81 # define DH_CHECK_PUBKEY_TOO_LARGE 0x02
82 # define DH_CHECK_PUBKEY_INVALID 0x04
85 * primes p where (p-1)/2 is prime too are called "safe"; we define this for
86 * backward compatibility:
88 # define DH_CHECK_P_NOT_STRONG_PRIME DH_CHECK_P_NOT_SAFE_PRIME
90 # define d2i_DHparams_fp(fp,x) (DH *)ASN1_d2i_fp((char *(*)())DH_new, \
91 (char *(*)())d2i_DHparams,(fp),(unsigned char **)(x))
92 # define i2d_DHparams_fp(fp,x) ASN1_i2d_fp(i2d_DHparams,(fp), \
94 # define d2i_DHparams_bio(bp,x) ASN1_d2i_bio_of(DH,DH_new,d2i_DHparams,bp,x)
95 # define i2d_DHparams_bio(bp,x) ASN1_i2d_bio_of_const(DH,i2d_DHparams,bp,x)
97 DH *DHparams_dup(DH *);
99 const DH_METHOD *DH_OpenSSL(void);
101 void DH_set_default_method(const DH_METHOD *meth);
102 const DH_METHOD *DH_get_default_method(void);
103 int DH_set_method(DH *dh, const DH_METHOD *meth);
104 DH *DH_new_method(ENGINE *engine);
107 void DH_free(DH *dh);
108 int DH_up_ref(DH *dh);
109 int DH_bits(const DH *dh);
110 int DH_size(const DH *dh);
111 int DH_security_bits(const DH *dh);
112 #define DH_get_ex_new_index(l, p, newf, dupf, freef) \
113 CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_DH, l, p, newf, dupf, freef)
114 int DH_set_ex_data(DH *d, int idx, void *arg);
115 void *DH_get_ex_data(DH *d, int idx);
117 /* Deprecated version */
118 DEPRECATEDIN_0_9_8(DH *DH_generate_parameters(int prime_len, int generator,
119 void (*callback) (int, int,
124 int DH_generate_parameters_ex(DH *dh, int prime_len, int generator,
127 int DH_check(const DH *dh, int *codes);
128 int DH_check_pub_key(const DH *dh, const BIGNUM *pub_key, int *codes);
129 int DH_generate_key(DH *dh);
130 int DH_compute_key(unsigned char *key, const BIGNUM *pub_key, DH *dh);
131 int DH_compute_key_padded(unsigned char *key, const BIGNUM *pub_key, DH *dh);
132 DH *d2i_DHparams(DH **a, const unsigned char **pp, long length);
133 int i2d_DHparams(const DH *a, unsigned char **pp);
134 DH *d2i_DHxparams(DH **a, const unsigned char **pp, long length);
135 int i2d_DHxparams(const DH *a, unsigned char **pp);
136 # ifndef OPENSSL_NO_STDIO
137 int DHparams_print_fp(FILE *fp, const DH *x);
139 int DHparams_print(BIO *bp, const DH *x);
141 /* RFC 5114 parameters */
142 DH *DH_get_1024_160(void);
143 DH *DH_get_2048_224(void);
144 DH *DH_get_2048_256(void);
146 # ifndef OPENSSL_NO_CMS
148 int DH_KDF_X9_42(unsigned char *out, size_t outlen,
149 const unsigned char *Z, size_t Zlen,
150 ASN1_OBJECT *key_oid,
151 const unsigned char *ukm, size_t ukmlen, const EVP_MD *md);
154 void DH_get0_pqg(const DH *dh,
155 const BIGNUM **p, const BIGNUM **q, const BIGNUM **g);
156 int DH_set0_pqg(DH *dh, BIGNUM *p, BIGNUM *q, BIGNUM *g);
157 void DH_get0_key(const DH *dh,
158 const BIGNUM **pub_key, const BIGNUM **priv_key);
159 int DH_set0_key(DH *dh, BIGNUM *pub_key, BIGNUM *priv_key);
160 void DH_clear_flags(DH *dh, int flags);
161 int DH_test_flags(const DH *dh, int flags);
162 void DH_set_flags(DH *dh, int flags);
163 ENGINE *DH_get0_engine(DH *d);
164 long DH_get_length(const DH *dh);
165 int DH_set_length(DH *dh, long length);
167 DH_METHOD *DH_meth_new(const char *name, int flags);
168 void DH_meth_free(DH_METHOD *dhm);
169 DH_METHOD *DH_meth_dup(const DH_METHOD *dhm);
170 const char *DH_meth_get0_name(const DH_METHOD *dhm);
171 int DH_meth_set1_name(DH_METHOD *dhm, const char *name);
172 int DH_meth_get_flags(DH_METHOD *dhm);
173 int DH_meth_set_flags(DH_METHOD *dhm, int flags);
174 void *DH_meth_get0_app_data(const DH_METHOD *dhm);
175 int DH_meth_set0_app_data(DH_METHOD *dhm, void *app_data);
176 int (*DH_meth_get_generate_key(const DH_METHOD *dhm)) (DH *);
177 int DH_meth_set_generate_key(DH_METHOD *dhm, int (*generate_key) (DH *));
178 int (*DH_meth_get_compute_key(const DH_METHOD *dhm))
179 (unsigned char *key, const BIGNUM *pub_key, DH *dh);
180 int DH_meth_set_compute_key(DH_METHOD *dhm,
181 int (*compute_key) (unsigned char *key, const BIGNUM *pub_key, DH *dh));
182 int (*DH_meth_get_bn_mod_exp(const DH_METHOD *dhm))
183 (const DH *, BIGNUM *, const BIGNUM *, const BIGNUM *, const BIGNUM *,
184 BN_CTX *, BN_MONT_CTX *);
185 int DH_meth_set_bn_mod_exp(DH_METHOD *dhm,
186 int (*bn_mod_exp) (const DH *, BIGNUM *, const BIGNUM *, const BIGNUM *,
187 const BIGNUM *, BN_CTX *, BN_MONT_CTX *));
188 int (*DH_meth_get_init(const DH_METHOD *dhm))(DH *);
189 int DH_meth_set_init(DH_METHOD *dhm, int (*init)(DH *));
190 int (*DH_meth_get_finish(const DH_METHOD *dhm)) (DH *);
191 int DH_meth_set_finish(DH_METHOD *dhm, int (*finish) (DH *));
192 int (*DH_meth_get_generate_params(const DH_METHOD *dhm))
193 (DH *, int, int, BN_GENCB *);
194 int DH_meth_set_generate_params(DH_METHOD *dhm,
195 int (*generate_params) (DH *, int, int, BN_GENCB *));
198 # define EVP_PKEY_CTX_set_dh_paramgen_prime_len(ctx, len) \
199 EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_PARAMGEN, \
200 EVP_PKEY_CTRL_DH_PARAMGEN_PRIME_LEN, len, NULL)
202 # define EVP_PKEY_CTX_set_dh_paramgen_subprime_len(ctx, len) \
203 EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_PARAMGEN, \
204 EVP_PKEY_CTRL_DH_PARAMGEN_SUBPRIME_LEN, len, NULL)
206 # define EVP_PKEY_CTX_set_dh_paramgen_type(ctx, typ) \
207 EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_PARAMGEN, \
208 EVP_PKEY_CTRL_DH_PARAMGEN_TYPE, typ, NULL)
210 # define EVP_PKEY_CTX_set_dh_paramgen_generator(ctx, gen) \
211 EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_PARAMGEN, \
212 EVP_PKEY_CTRL_DH_PARAMGEN_GENERATOR, gen, NULL)
214 # define EVP_PKEY_CTX_set_dh_rfc5114(ctx, gen) \
215 EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, EVP_PKEY_OP_PARAMGEN, \
216 EVP_PKEY_CTRL_DH_RFC5114, gen, NULL)
218 # define EVP_PKEY_CTX_set_dhx_rfc5114(ctx, gen) \
219 EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, EVP_PKEY_OP_PARAMGEN, \
220 EVP_PKEY_CTRL_DH_RFC5114, gen, NULL)
222 # define EVP_PKEY_CTX_set_dh_kdf_type(ctx, kdf) \
223 EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, \
224 EVP_PKEY_OP_DERIVE, \
225 EVP_PKEY_CTRL_DH_KDF_TYPE, kdf, NULL)
227 # define EVP_PKEY_CTX_get_dh_kdf_type(ctx) \
228 EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, \
229 EVP_PKEY_OP_DERIVE, \
230 EVP_PKEY_CTRL_DH_KDF_TYPE, -2, NULL)
232 # define EVP_PKEY_CTX_set0_dh_kdf_oid(ctx, oid) \
233 EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, \
234 EVP_PKEY_OP_DERIVE, \
235 EVP_PKEY_CTRL_DH_KDF_OID, 0, (void *)oid)
237 # define EVP_PKEY_CTX_get0_dh_kdf_oid(ctx, poid) \
238 EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, \
239 EVP_PKEY_OP_DERIVE, \
240 EVP_PKEY_CTRL_GET_DH_KDF_OID, 0, (void *)poid)
242 # define EVP_PKEY_CTX_set_dh_kdf_md(ctx, md) \
243 EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, \
244 EVP_PKEY_OP_DERIVE, \
245 EVP_PKEY_CTRL_DH_KDF_MD, 0, (void *)md)
247 # define EVP_PKEY_CTX_get_dh_kdf_md(ctx, pmd) \
248 EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, \
249 EVP_PKEY_OP_DERIVE, \
250 EVP_PKEY_CTRL_GET_DH_KDF_MD, 0, (void *)pmd)
252 # define EVP_PKEY_CTX_set_dh_kdf_outlen(ctx, len) \
253 EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, \
254 EVP_PKEY_OP_DERIVE, \
255 EVP_PKEY_CTRL_DH_KDF_OUTLEN, len, NULL)
257 # define EVP_PKEY_CTX_get_dh_kdf_outlen(ctx, plen) \
258 EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, \
259 EVP_PKEY_OP_DERIVE, \
260 EVP_PKEY_CTRL_GET_DH_KDF_OUTLEN, 0, (void *)plen)
262 # define EVP_PKEY_CTX_set0_dh_kdf_ukm(ctx, p, plen) \
263 EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, \
264 EVP_PKEY_OP_DERIVE, \
265 EVP_PKEY_CTRL_DH_KDF_UKM, plen, (void *)p)
267 # define EVP_PKEY_CTX_get0_dh_kdf_ukm(ctx, p) \
268 EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, \
269 EVP_PKEY_OP_DERIVE, \
270 EVP_PKEY_CTRL_GET_DH_KDF_UKM, 0, (void *)p)
272 # define EVP_PKEY_CTRL_DH_PARAMGEN_PRIME_LEN (EVP_PKEY_ALG_CTRL + 1)
273 # define EVP_PKEY_CTRL_DH_PARAMGEN_GENERATOR (EVP_PKEY_ALG_CTRL + 2)
274 # define EVP_PKEY_CTRL_DH_RFC5114 (EVP_PKEY_ALG_CTRL + 3)
275 # define EVP_PKEY_CTRL_DH_PARAMGEN_SUBPRIME_LEN (EVP_PKEY_ALG_CTRL + 4)
276 # define EVP_PKEY_CTRL_DH_PARAMGEN_TYPE (EVP_PKEY_ALG_CTRL + 5)
277 # define EVP_PKEY_CTRL_DH_KDF_TYPE (EVP_PKEY_ALG_CTRL + 6)
278 # define EVP_PKEY_CTRL_DH_KDF_MD (EVP_PKEY_ALG_CTRL + 7)
279 # define EVP_PKEY_CTRL_GET_DH_KDF_MD (EVP_PKEY_ALG_CTRL + 8)
280 # define EVP_PKEY_CTRL_DH_KDF_OUTLEN (EVP_PKEY_ALG_CTRL + 9)
281 # define EVP_PKEY_CTRL_GET_DH_KDF_OUTLEN (EVP_PKEY_ALG_CTRL + 10)
282 # define EVP_PKEY_CTRL_DH_KDF_UKM (EVP_PKEY_ALG_CTRL + 11)
283 # define EVP_PKEY_CTRL_GET_DH_KDF_UKM (EVP_PKEY_ALG_CTRL + 12)
284 # define EVP_PKEY_CTRL_DH_KDF_OID (EVP_PKEY_ALG_CTRL + 13)
285 # define EVP_PKEY_CTRL_GET_DH_KDF_OID (EVP_PKEY_ALG_CTRL + 14)
288 # define EVP_PKEY_DH_KDF_NONE 1
289 # ifndef OPENSSL_NO_CMS
290 # define EVP_PKEY_DH_KDF_X9_42 2
293 /* BEGIN ERROR CODES */
295 * The following lines are auto generated by the script mkerr.pl. Any changes
296 * made after this point may be overwritten when the script is next run.
299 int ERR_load_DH_strings(void);
301 /* Error codes for the DH functions. */
303 /* Function codes. */
304 # define DH_F_COMPUTE_KEY 102
305 # define DH_F_DHPARAMS_PRINT_FP 101
306 # define DH_F_DH_BUILTIN_GENPARAMS 106
307 # define DH_F_DH_CMS_DECRYPT 114
308 # define DH_F_DH_CMS_SET_PEERKEY 115
309 # define DH_F_DH_CMS_SET_SHARED_INFO 116
310 # define DH_F_DH_METH_DUP 117
311 # define DH_F_DH_METH_NEW 118
312 # define DH_F_DH_METH_SET1_NAME 119
313 # define DH_F_DH_NEW_METHOD 105
314 # define DH_F_DH_PARAM_DECODE 107
315 # define DH_F_DH_PRIV_DECODE 110
316 # define DH_F_DH_PRIV_ENCODE 111
317 # define DH_F_DH_PUB_DECODE 108
318 # define DH_F_DH_PUB_ENCODE 109
319 # define DH_F_DO_DH_PRINT 100
320 # define DH_F_GENERATE_KEY 103
321 # define DH_F_PKEY_DH_DERIVE 112
322 # define DH_F_PKEY_DH_KEYGEN 113
325 # define DH_R_BAD_GENERATOR 101
326 # define DH_R_BN_DECODE_ERROR 109
327 # define DH_R_BN_ERROR 106
328 # define DH_R_DECODE_ERROR 104
329 # define DH_R_INVALID_PUBKEY 102
330 # define DH_R_KDF_PARAMETER_ERROR 112
331 # define DH_R_KEYS_NOT_SET 108
332 # define DH_R_MODULUS_TOO_LARGE 103
333 # define DH_R_NO_PARAMETERS_SET 107
334 # define DH_R_NO_PRIVATE_VALUE 100
335 # define DH_R_PARAMETER_ENCODING_ERROR 105
336 # define DH_R_PEER_KEY_ERROR 111
337 # define DH_R_SHARED_INFO_ERROR 113