dh.h 13 KB

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  1. /*
  2. * Copyright 1995-2023 The OpenSSL Project Authors. All Rights Reserved.
  3. *
  4. * Licensed under the Apache License 2.0 (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
  8. */
  9. #ifndef OPENSSL_DH_H
  10. #define OPENSSL_DH_H
  11. #pragma once
  12. #include <openssl/macros.h>
  13. #ifndef OPENSSL_NO_DEPRECATED_3_0
  14. #define HEADER_DH_H
  15. #endif
  16. #include <openssl/opensslconf.h>
  17. #include <openssl/types.h>
  18. #ifdef __cplusplus
  19. extern "C" {
  20. #endif
  21. #include <stdlib.h>
  22. /*
  23. * DH parameter generation types used by EVP_PKEY_CTX_set_dh_paramgen_type()
  24. * Note that additions/changes to this set of values requires corresponding
  25. * adjustments to range checks in dh_gen()
  26. */
  27. #define DH_PARAMGEN_TYPE_GENERATOR 0 /* Use a safe prime generator */
  28. #define DH_PARAMGEN_TYPE_FIPS_186_2 1 /* Use FIPS186-2 standard */
  29. #define DH_PARAMGEN_TYPE_FIPS_186_4 2 /* Use FIPS186-4 standard */
  30. #define DH_PARAMGEN_TYPE_GROUP 3 /* Use a named safe prime group */
  31. int EVP_PKEY_CTX_set_dh_paramgen_type(EVP_PKEY_CTX *ctx, int typ);
  32. int EVP_PKEY_CTX_set_dh_paramgen_gindex(EVP_PKEY_CTX *ctx, int gindex);
  33. int EVP_PKEY_CTX_set_dh_paramgen_seed(EVP_PKEY_CTX *ctx,
  34. const unsigned char *seed,
  35. size_t seedlen);
  36. int EVP_PKEY_CTX_set_dh_paramgen_prime_len(EVP_PKEY_CTX *ctx, int pbits);
  37. int EVP_PKEY_CTX_set_dh_paramgen_subprime_len(EVP_PKEY_CTX *ctx, int qlen);
  38. int EVP_PKEY_CTX_set_dh_paramgen_generator(EVP_PKEY_CTX *ctx, int gen);
  39. int EVP_PKEY_CTX_set_dh_nid(EVP_PKEY_CTX *ctx, int nid);
  40. int EVP_PKEY_CTX_set_dh_rfc5114(EVP_PKEY_CTX *ctx, int gen);
  41. int EVP_PKEY_CTX_set_dhx_rfc5114(EVP_PKEY_CTX *ctx, int gen);
  42. int EVP_PKEY_CTX_set_dh_pad(EVP_PKEY_CTX *ctx, int pad);
  43. int EVP_PKEY_CTX_set_dh_kdf_type(EVP_PKEY_CTX *ctx, int kdf);
  44. int EVP_PKEY_CTX_get_dh_kdf_type(EVP_PKEY_CTX *ctx);
  45. int EVP_PKEY_CTX_set0_dh_kdf_oid(EVP_PKEY_CTX *ctx, ASN1_OBJECT *oid);
  46. int EVP_PKEY_CTX_get0_dh_kdf_oid(EVP_PKEY_CTX *ctx, ASN1_OBJECT **oid);
  47. int EVP_PKEY_CTX_set_dh_kdf_md(EVP_PKEY_CTX *ctx, const EVP_MD *md);
  48. int EVP_PKEY_CTX_get_dh_kdf_md(EVP_PKEY_CTX *ctx, const EVP_MD **md);
  49. int EVP_PKEY_CTX_set_dh_kdf_outlen(EVP_PKEY_CTX *ctx, int len);
  50. int EVP_PKEY_CTX_get_dh_kdf_outlen(EVP_PKEY_CTX *ctx, int *len);
  51. int EVP_PKEY_CTX_set0_dh_kdf_ukm(EVP_PKEY_CTX *ctx, unsigned char *ukm, int len);
  52. #ifndef OPENSSL_NO_DEPRECATED_3_0
  53. OSSL_DEPRECATEDIN_3_0
  54. int EVP_PKEY_CTX_get0_dh_kdf_ukm(EVP_PKEY_CTX *ctx, unsigned char **ukm);
  55. #endif
  56. #define EVP_PKEY_CTRL_DH_PARAMGEN_PRIME_LEN (EVP_PKEY_ALG_CTRL + 1)
  57. #define EVP_PKEY_CTRL_DH_PARAMGEN_GENERATOR (EVP_PKEY_ALG_CTRL + 2)
  58. #define EVP_PKEY_CTRL_DH_RFC5114 (EVP_PKEY_ALG_CTRL + 3)
  59. #define EVP_PKEY_CTRL_DH_PARAMGEN_SUBPRIME_LEN (EVP_PKEY_ALG_CTRL + 4)
  60. #define EVP_PKEY_CTRL_DH_PARAMGEN_TYPE (EVP_PKEY_ALG_CTRL + 5)
  61. #define EVP_PKEY_CTRL_DH_KDF_TYPE (EVP_PKEY_ALG_CTRL + 6)
  62. #define EVP_PKEY_CTRL_DH_KDF_MD (EVP_PKEY_ALG_CTRL + 7)
  63. #define EVP_PKEY_CTRL_GET_DH_KDF_MD (EVP_PKEY_ALG_CTRL + 8)
  64. #define EVP_PKEY_CTRL_DH_KDF_OUTLEN (EVP_PKEY_ALG_CTRL + 9)
  65. #define EVP_PKEY_CTRL_GET_DH_KDF_OUTLEN (EVP_PKEY_ALG_CTRL + 10)
  66. #define EVP_PKEY_CTRL_DH_KDF_UKM (EVP_PKEY_ALG_CTRL + 11)
  67. #define EVP_PKEY_CTRL_GET_DH_KDF_UKM (EVP_PKEY_ALG_CTRL + 12)
  68. #define EVP_PKEY_CTRL_DH_KDF_OID (EVP_PKEY_ALG_CTRL + 13)
  69. #define EVP_PKEY_CTRL_GET_DH_KDF_OID (EVP_PKEY_ALG_CTRL + 14)
  70. #define EVP_PKEY_CTRL_DH_NID (EVP_PKEY_ALG_CTRL + 15)
  71. #define EVP_PKEY_CTRL_DH_PAD (EVP_PKEY_ALG_CTRL + 16)
  72. /* KDF types */
  73. #define EVP_PKEY_DH_KDF_NONE 1
  74. #define EVP_PKEY_DH_KDF_X9_42 2
  75. #ifndef OPENSSL_NO_STDIO
  76. #include <stdio.h>
  77. #endif
  78. #ifndef OPENSSL_NO_DH
  79. #include <openssl/e_os2.h>
  80. #include <openssl/bio.h>
  81. #include <openssl/asn1.h>
  82. #ifndef OPENSSL_NO_DEPRECATED_1_1_0
  83. #include <openssl/bn.h>
  84. #endif
  85. #include <openssl/dherr.h>
  86. #ifndef OPENSSL_DH_MAX_MODULUS_BITS
  87. #define OPENSSL_DH_MAX_MODULUS_BITS 10000
  88. #endif
  89. #ifndef OPENSSL_DH_CHECK_MAX_MODULUS_BITS
  90. #define OPENSSL_DH_CHECK_MAX_MODULUS_BITS 32768
  91. #endif
  92. #define OPENSSL_DH_FIPS_MIN_MODULUS_BITS 1024
  93. #define DH_FLAG_CACHE_MONT_P 0x01
  94. #define DH_FLAG_TYPE_MASK 0xF000
  95. #define DH_FLAG_TYPE_DH 0x0000
  96. #define DH_FLAG_TYPE_DHX 0x1000
  97. #ifndef OPENSSL_NO_DEPRECATED_1_1_0
  98. /*
  99. * Does nothing. Previously this switched off constant time behaviour.
  100. */
  101. #define DH_FLAG_NO_EXP_CONSTTIME 0x00
  102. #endif
  103. #ifndef OPENSSL_NO_DEPRECATED_3_0
  104. /*
  105. * If this flag is set the DH method is FIPS compliant and can be used in
  106. * FIPS mode. This is set in the validated module method. If an application
  107. * sets this flag in its own methods it is its responsibility to ensure the
  108. * result is compliant.
  109. */
  110. #define DH_FLAG_FIPS_METHOD 0x0400
  111. /*
  112. * If this flag is set the operations normally disabled in FIPS mode are
  113. * permitted it is then the applications responsibility to ensure that the
  114. * usage is compliant.
  115. */
  116. #define DH_FLAG_NON_FIPS_ALLOW 0x0400
  117. #endif
  118. /* Already defined in ossl_typ.h */
  119. /* typedef struct dh_st DH; */
  120. /* typedef struct dh_method DH_METHOD; */
  121. DECLARE_ASN1_ITEM(DHparams)
  122. #ifndef OPENSSL_NO_DEPRECATED_3_0
  123. #define DH_GENERATOR_2 2
  124. #define DH_GENERATOR_3 3
  125. #define DH_GENERATOR_5 5
  126. /* DH_check error codes, some of them shared with DH_check_pub_key */
  127. /*
  128. * NB: These values must align with the equivalently named macros in
  129. * internal/ffc.h.
  130. */
  131. #define DH_CHECK_P_NOT_PRIME 0x01
  132. #define DH_CHECK_P_NOT_SAFE_PRIME 0x02
  133. #define DH_UNABLE_TO_CHECK_GENERATOR 0x04
  134. #define DH_NOT_SUITABLE_GENERATOR 0x08
  135. #define DH_CHECK_Q_NOT_PRIME 0x10
  136. #define DH_CHECK_INVALID_Q_VALUE 0x20 /* +DH_check_pub_key */
  137. #define DH_CHECK_INVALID_J_VALUE 0x40
  138. #define DH_MODULUS_TOO_SMALL 0x80
  139. #define DH_MODULUS_TOO_LARGE 0x100 /* +DH_check_pub_key */
  140. /* DH_check_pub_key error codes */
  141. #define DH_CHECK_PUBKEY_TOO_SMALL 0x01
  142. #define DH_CHECK_PUBKEY_TOO_LARGE 0x02
  143. #define DH_CHECK_PUBKEY_INVALID 0x04
  144. /*
  145. * primes p where (p-1)/2 is prime too are called "safe"; we define this for
  146. * backward compatibility:
  147. */
  148. #define DH_CHECK_P_NOT_STRONG_PRIME DH_CHECK_P_NOT_SAFE_PRIME
  149. #define d2i_DHparams_fp(fp, x) \
  150. (DH *)ASN1_d2i_fp((void *(*)(void))DH_new, \
  151. (d2i_of_void *)d2i_DHparams, \
  152. (fp), \
  153. (void **)(x))
  154. #define i2d_DHparams_fp(fp, x) \
  155. ASN1_i2d_fp(i2d_DHparams, (fp), (unsigned char *)(x))
  156. #define d2i_DHparams_bio(bp, x) \
  157. ASN1_d2i_bio_of(DH, DH_new, d2i_DHparams, bp, x)
  158. #define i2d_DHparams_bio(bp, x) \
  159. ASN1_i2d_bio_of(DH, i2d_DHparams, bp, x)
  160. #define d2i_DHxparams_fp(fp, x) \
  161. (DH *)ASN1_d2i_fp((void *(*)(void))DH_new, \
  162. (d2i_of_void *)d2i_DHxparams, \
  163. (fp), \
  164. (void **)(x))
  165. #define i2d_DHxparams_fp(fp, x) \
  166. ASN1_i2d_fp(i2d_DHxparams, (fp), (unsigned char *)(x))
  167. #define d2i_DHxparams_bio(bp, x) \
  168. ASN1_d2i_bio_of(DH, DH_new, d2i_DHxparams, bp, x)
  169. #define i2d_DHxparams_bio(bp, x) \
  170. ASN1_i2d_bio_of(DH, i2d_DHxparams, bp, x)
  171. DECLARE_ASN1_DUP_FUNCTION_name_attr(OSSL_DEPRECATEDIN_3_0, DH, DHparams)
  172. OSSL_DEPRECATEDIN_3_0 const DH_METHOD *DH_OpenSSL(void);
  173. OSSL_DEPRECATEDIN_3_0 void DH_set_default_method(const DH_METHOD *meth);
  174. OSSL_DEPRECATEDIN_3_0 const DH_METHOD *DH_get_default_method(void);
  175. OSSL_DEPRECATEDIN_3_0 int DH_set_method(DH *dh, const DH_METHOD *meth);
  176. OSSL_DEPRECATEDIN_3_0 DH *DH_new_method(ENGINE *engine);
  177. OSSL_DEPRECATEDIN_3_0 DH *DH_new(void);
  178. OSSL_DEPRECATEDIN_3_0 void DH_free(DH *dh);
  179. OSSL_DEPRECATEDIN_3_0 int DH_up_ref(DH *dh);
  180. OSSL_DEPRECATEDIN_3_0 int DH_bits(const DH *dh);
  181. OSSL_DEPRECATEDIN_3_0 int DH_size(const DH *dh);
  182. OSSL_DEPRECATEDIN_3_0 int DH_security_bits(const DH *dh);
  183. #define DH_get_ex_new_index(l, p, newf, dupf, freef) \
  184. CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_DH, l, p, newf, dupf, freef)
  185. OSSL_DEPRECATEDIN_3_0 int DH_set_ex_data(DH *d, int idx, void *arg);
  186. OSSL_DEPRECATEDIN_3_0 void *DH_get_ex_data(const DH *d, int idx);
  187. OSSL_DEPRECATEDIN_3_0 int DH_generate_parameters_ex(DH *dh, int prime_len,
  188. int generator,
  189. BN_GENCB *cb);
  190. OSSL_DEPRECATEDIN_3_0 int DH_check_params_ex(const DH *dh);
  191. OSSL_DEPRECATEDIN_3_0 int DH_check_ex(const DH *dh);
  192. OSSL_DEPRECATEDIN_3_0 int DH_check_pub_key_ex(const DH *dh, const BIGNUM *pub_key);
  193. OSSL_DEPRECATEDIN_3_0 int DH_check_params(const DH *dh, int *ret);
  194. OSSL_DEPRECATEDIN_3_0 int DH_check(const DH *dh, int *codes);
  195. OSSL_DEPRECATEDIN_3_0 int DH_check_pub_key(const DH *dh, const BIGNUM *pub_key,
  196. int *codes);
  197. OSSL_DEPRECATEDIN_3_0 int DH_generate_key(DH *dh);
  198. OSSL_DEPRECATEDIN_3_0 int DH_compute_key(unsigned char *key,
  199. const BIGNUM *pub_key, DH *dh);
  200. OSSL_DEPRECATEDIN_3_0 int DH_compute_key_padded(unsigned char *key,
  201. const BIGNUM *pub_key, DH *dh);
  202. DECLARE_ASN1_ENCODE_FUNCTIONS_only_attr(OSSL_DEPRECATEDIN_3_0, DH, DHparams)
  203. DECLARE_ASN1_ENCODE_FUNCTIONS_only_attr(OSSL_DEPRECATEDIN_3_0, DH, DHxparams)
  204. #ifndef OPENSSL_NO_STDIO
  205. OSSL_DEPRECATEDIN_3_0 int DHparams_print_fp(FILE *fp, const DH *x);
  206. #endif
  207. OSSL_DEPRECATEDIN_3_0 int DHparams_print(BIO *bp, const DH *x);
  208. /* RFC 5114 parameters */
  209. OSSL_DEPRECATEDIN_3_0 DH *DH_get_1024_160(void);
  210. OSSL_DEPRECATEDIN_3_0 DH *DH_get_2048_224(void);
  211. OSSL_DEPRECATEDIN_3_0 DH *DH_get_2048_256(void);
  212. /* Named parameters, currently RFC7919 and RFC3526 */
  213. OSSL_DEPRECATEDIN_3_0 DH *DH_new_by_nid(int nid);
  214. OSSL_DEPRECATEDIN_3_0 int DH_get_nid(const DH *dh);
  215. /* RFC2631 KDF */
  216. OSSL_DEPRECATEDIN_3_0 int DH_KDF_X9_42(unsigned char *out, size_t outlen,
  217. const unsigned char *Z, size_t Zlen,
  218. ASN1_OBJECT *key_oid,
  219. const unsigned char *ukm,
  220. size_t ukmlen, const EVP_MD *md);
  221. OSSL_DEPRECATEDIN_3_0 void DH_get0_pqg(const DH *dh, const BIGNUM **p,
  222. const BIGNUM **q, const BIGNUM **g);
  223. OSSL_DEPRECATEDIN_3_0 int DH_set0_pqg(DH *dh, BIGNUM *p, BIGNUM *q, BIGNUM *g);
  224. OSSL_DEPRECATEDIN_3_0 void DH_get0_key(const DH *dh, const BIGNUM **pub_key,
  225. const BIGNUM **priv_key);
  226. OSSL_DEPRECATEDIN_3_0 int DH_set0_key(DH *dh, BIGNUM *pub_key, BIGNUM *priv_key);
  227. OSSL_DEPRECATEDIN_3_0 const BIGNUM *DH_get0_p(const DH *dh);
  228. OSSL_DEPRECATEDIN_3_0 const BIGNUM *DH_get0_q(const DH *dh);
  229. OSSL_DEPRECATEDIN_3_0 const BIGNUM *DH_get0_g(const DH *dh);
  230. OSSL_DEPRECATEDIN_3_0 const BIGNUM *DH_get0_priv_key(const DH *dh);
  231. OSSL_DEPRECATEDIN_3_0 const BIGNUM *DH_get0_pub_key(const DH *dh);
  232. OSSL_DEPRECATEDIN_3_0 void DH_clear_flags(DH *dh, int flags);
  233. OSSL_DEPRECATEDIN_3_0 int DH_test_flags(const DH *dh, int flags);
  234. OSSL_DEPRECATEDIN_3_0 void DH_set_flags(DH *dh, int flags);
  235. OSSL_DEPRECATEDIN_3_0 ENGINE *DH_get0_engine(DH *d);
  236. OSSL_DEPRECATEDIN_3_0 long DH_get_length(const DH *dh);
  237. OSSL_DEPRECATEDIN_3_0 int DH_set_length(DH *dh, long length);
  238. OSSL_DEPRECATEDIN_3_0 DH_METHOD *DH_meth_new(const char *name, int flags);
  239. OSSL_DEPRECATEDIN_3_0 void DH_meth_free(DH_METHOD *dhm);
  240. OSSL_DEPRECATEDIN_3_0 DH_METHOD *DH_meth_dup(const DH_METHOD *dhm);
  241. OSSL_DEPRECATEDIN_3_0 const char *DH_meth_get0_name(const DH_METHOD *dhm);
  242. OSSL_DEPRECATEDIN_3_0 int DH_meth_set1_name(DH_METHOD *dhm, const char *name);
  243. OSSL_DEPRECATEDIN_3_0 int DH_meth_get_flags(const DH_METHOD *dhm);
  244. OSSL_DEPRECATEDIN_3_0 int DH_meth_set_flags(DH_METHOD *dhm, int flags);
  245. OSSL_DEPRECATEDIN_3_0 void *DH_meth_get0_app_data(const DH_METHOD *dhm);
  246. OSSL_DEPRECATEDIN_3_0 int DH_meth_set0_app_data(DH_METHOD *dhm, void *app_data);
  247. OSSL_DEPRECATEDIN_3_0 int (*DH_meth_get_generate_key(const DH_METHOD *dhm))(DH *);
  248. OSSL_DEPRECATEDIN_3_0 int DH_meth_set_generate_key(DH_METHOD *dhm,
  249. int (*generate_key)(DH *));
  250. OSSL_DEPRECATEDIN_3_0 int (*DH_meth_get_compute_key(const DH_METHOD *dhm))(unsigned char *key,
  251. const BIGNUM *pub_key,
  252. DH *dh);
  253. OSSL_DEPRECATEDIN_3_0 int DH_meth_set_compute_key(DH_METHOD *dhm,
  254. int (*compute_key)(unsigned char *key,
  255. const BIGNUM *pub_key,
  256. DH *dh));
  257. OSSL_DEPRECATEDIN_3_0 int (*DH_meth_get_bn_mod_exp(const DH_METHOD *dhm))(const DH *, BIGNUM *,
  258. const BIGNUM *,
  259. const BIGNUM *,
  260. const BIGNUM *, BN_CTX *,
  261. BN_MONT_CTX *);
  262. OSSL_DEPRECATEDIN_3_0 int DH_meth_set_bn_mod_exp(DH_METHOD *dhm,
  263. int (*bn_mod_exp)(const DH *, BIGNUM *,
  264. const BIGNUM *, const BIGNUM *,
  265. const BIGNUM *, BN_CTX *,
  266. BN_MONT_CTX *));
  267. OSSL_DEPRECATEDIN_3_0 int (*DH_meth_get_init(const DH_METHOD *dhm))(DH *);
  268. OSSL_DEPRECATEDIN_3_0 int DH_meth_set_init(DH_METHOD *dhm, int (*init)(DH *));
  269. OSSL_DEPRECATEDIN_3_0 int (*DH_meth_get_finish(const DH_METHOD *dhm))(DH *);
  270. OSSL_DEPRECATEDIN_3_0 int DH_meth_set_finish(DH_METHOD *dhm, int (*finish)(DH *));
  271. OSSL_DEPRECATEDIN_3_0 int (*DH_meth_get_generate_params(const DH_METHOD *dhm))(DH *, int, int,
  272. BN_GENCB *);
  273. OSSL_DEPRECATEDIN_3_0 int DH_meth_set_generate_params(DH_METHOD *dhm,
  274. int (*generate_params)(DH *, int, int,
  275. BN_GENCB *));
  276. #endif /* OPENSSL_NO_DEPRECATED_3_0 */
  277. #ifndef OPENSSL_NO_DEPRECATED_0_9_8
  278. OSSL_DEPRECATEDIN_0_9_8 DH *DH_generate_parameters(int prime_len, int generator,
  279. void (*callback)(int, int,
  280. void *),
  281. void *cb_arg);
  282. #endif
  283. #endif
  284. #ifdef __cplusplus
  285. }
  286. #endif
  287. #endif