3 /**********************************************************************
5 * Copyright (c) 2006 Cryptocom LTD *
6 * This file is distributed under the same license as OpenSSL *
8 * Internal declarations used in GOST engine *
9 * OpenSSL 0.9.9 libraries required to compile and use *
11 **********************************************************************/
12 # include <openssl/bn.h>
13 # include <openssl/evp.h>
14 # include <openssl/dsa.h>
15 # include <openssl/asn1t.h>
16 # include <openssl/x509.h>
17 # include <openssl/engine.h>
18 # include <openssl/ec.h>
20 # include "gosthash.h"
21 /* Control commands */
22 # define GOST_PARAM_CRYPT_PARAMS 0
23 # define GOST_PARAM_PBE_PARAMS 1
24 # define GOST_PARAM_MAX 1
25 # define GOST_CTRL_CRYPT_PARAMS (ENGINE_CMD_BASE+GOST_PARAM_CRYPT_PARAMS)
26 # define GOST_CTRL_PBE_PARAMS (ENGINE_CMD_BASE+GOST_PARAM_PBE_PARAMS)
28 extern const ENGINE_CMD_DEFN gost_cmds[];
29 int gost_control_func(ENGINE *e, int cmd, long i, void *p, void (*f) (void));
30 const char *get_gost_engine_param(int param);
31 int gost_set_default_param(int param, const char *value);
32 void gost_param_free(void);
34 /* method registration */
36 int register_ameth_gost(int nid, EVP_PKEY_ASN1_METHOD **ameth,
37 const char *pemstr, const char *info);
38 int register_pmeth_gost(int id, EVP_PKEY_METHOD **pmeth, int flags);
40 /* Gost-specific pmeth control-function parameters */
41 /* For GOST R34.10 parameters */
42 # define param_ctrl_string "paramset"
43 # define EVP_PKEY_CTRL_GOST_PARAMSET (EVP_PKEY_ALG_CTRL+1)
44 /* For GOST 28147 MAC */
45 # define key_ctrl_string "key"
46 # define hexkey_ctrl_string "hexkey"
47 # define EVP_PKEY_CTRL_GOST_MAC_HEXKEY (EVP_PKEY_ALG_CTRL+3)
48 /* Pmeth internal representation */
49 struct gost_pmeth_data {
50 int sign_param_nid; /* Should be set whenever parameters are
53 unsigned char *shared_ukm;
57 struct gost_mac_pmeth_data {
60 unsigned char key[32];
62 /* GOST-specific ASN1 structures */
65 ASN1_OCTET_STRING *encrypted_key;
66 ASN1_OCTET_STRING *imit;
69 DECLARE_ASN1_FUNCTIONS(GOST_KEY_INFO)
73 X509_PUBKEY *ephem_key;
74 ASN1_OCTET_STRING *eph_iv;
75 } GOST_KEY_AGREEMENT_INFO;
77 DECLARE_ASN1_FUNCTIONS(GOST_KEY_AGREEMENT_INFO)
80 GOST_KEY_INFO *key_info;
81 GOST_KEY_AGREEMENT_INFO *key_agreement_info;
84 DECLARE_ASN1_FUNCTIONS(GOST_KEY_TRANSPORT)
86 typedef struct { /* FIXME incomplete */
87 GOST_KEY_TRANSPORT *gkt;
88 } GOST_CLIENT_KEY_EXCHANGE_PARAMS;
91 * Hacks to shorten symbols to 31 characters or less, or OpenVMS. This mimics
92 * what's done in symhacks.h, but since this is a very local header file, I
93 * prefered to put this hack directly here. -- Richard Levitte
95 # ifdef OPENSSL_SYS_VMS
96 # undef GOST_CLIENT_KEY_EXCHANGE_PARAMS_it
97 # define GOST_CLIENT_KEY_EXCHANGE_PARAMS_it GOST_CLIENT_KEY_EXC_PARAMS_it
98 # undef GOST_CLIENT_KEY_EXCHANGE_PARAMS_new
99 # define GOST_CLIENT_KEY_EXCHANGE_PARAMS_new GOST_CLIENT_KEY_EXC_PARAMS_new
100 # undef GOST_CLIENT_KEY_EXCHANGE_PARAMS_free
101 # define GOST_CLIENT_KEY_EXCHANGE_PARAMS_free GOST_CLIENT_KEY_EXC_PARAMS_free
102 # undef d2i_GOST_CLIENT_KEY_EXCHANGE_PARAMS
103 # define d2i_GOST_CLIENT_KEY_EXCHANGE_PARAMS d2i_GOST_CLIENT_KEY_EXC_PARAMS
104 # undef i2d_GOST_CLIENT_KEY_EXCHANGE_PARAMS
105 # define i2d_GOST_CLIENT_KEY_EXCHANGE_PARAMS i2d_GOST_CLIENT_KEY_EXC_PARAMS
106 # endif /* End of hack */
107 DECLARE_ASN1_FUNCTIONS(GOST_CLIENT_KEY_EXCHANGE_PARAMS)
109 ASN1_OBJECT *key_params;
110 ASN1_OBJECT *hash_params;
111 ASN1_OBJECT *cipher_params;
114 DECLARE_ASN1_FUNCTIONS(GOST_KEY_PARAMS)
117 ASN1_OCTET_STRING *iv;
118 ASN1_OBJECT *enc_param_set;
119 } GOST_CIPHER_PARAMS;
121 DECLARE_ASN1_FUNCTIONS(GOST_CIPHER_PARAMS)
124 ASN1_OCTET_STRING *masked_priv_key;
125 ASN1_OCTET_STRING *public_key;
128 DECLARE_ASN1_FUNCTIONS(MASKED_GOST_KEY)
130 /*============== Message digest and cipher related structures ==========*/
132 * Structure used as EVP_MD_CTX-md_data. It allows to avoid storing
133 * in the md-data pointers to dynamically allocated memory. I
134 * cannot invent better way to avoid memory leaks, because openssl
135 * insist on invoking Init on Final-ed digests, and there is no
136 * reliable way to find out whether pointer in the passed md_data is
139 struct ossl_gost_digest_ctx {
143 /* EVP_MD structure for GOST R 34.11 */
144 extern EVP_MD digest_gost;
145 /* EVP MD structure for GOST R 34.11-2012 algorithms */
146 extern EVP_MD digest_gost2012_256;
147 extern EVP_MD digest_gost2012_512;
148 /* EVP_MD structure for GOST 28147 in MAC mode */
149 extern EVP_MD imit_gost_cpa;
150 extern EVP_MD imit_gost_cp_12;
151 /* Cipher context used for EVP_CIPHER operation */
152 struct ossl_gost_cipher_ctx {
158 /* Structure to map parameter NID to S-block */
159 struct gost_cipher_info {
161 gost_subst_block *sblock;
164 /* Context for MAC */
165 struct ossl_gost_imit_ctx {
167 unsigned char buffer[8];
168 unsigned char partial_block[8];
174 /* Table which maps parameter NID to S-blocks */
175 extern struct gost_cipher_info gost_cipher_list[];
176 /* Find encryption params from ASN1_OBJECT */
177 const struct gost_cipher_info *get_encryption_params(ASN1_OBJECT *obj);
178 /* Implementation of GOST 28147-89 cipher in CFB and CNT modes */
179 extern EVP_CIPHER cipher_gost;
180 extern EVP_CIPHER cipher_gost_cpacnt;
181 extern EVP_CIPHER cipher_gost_cpcnt_12;
182 # define EVP_MD_CTRL_KEY_LEN (EVP_MD_CTRL_ALG_CTRL+3)
183 # define EVP_MD_CTRL_SET_KEY (EVP_MD_CTRL_ALG_CTRL+4)
184 /* EVP_PKEY_METHOD key encryption callbacks */
185 /* From gost94_keyx.c */
186 int pkey_GOST94cp_encrypt(EVP_PKEY_CTX *ctx, unsigned char *out,
187 size_t *outlen, const unsigned char *key,
190 int pkey_GOST94cp_decrypt(EVP_PKEY_CTX *ctx, unsigned char *out,
191 size_t *outlen, const unsigned char *in,
193 /* From gost_ec_keyx.c */
194 int pkey_GOST_ECcp_encrypt(EVP_PKEY_CTX *ctx, unsigned char *out,
195 size_t *outlen, const unsigned char *key,
198 int pkey_GOST_ECcp_decrypt(EVP_PKEY_CTX *ctx, unsigned char *out,
199 size_t *outlen, const unsigned char *in,
201 /* derive functions */
202 /* From gost_ec_keyx.c */
203 int pkey_gost_ec_derive(EVP_PKEY_CTX *ctx, unsigned char *key,
205 /* From gost94_keyx.c */
206 int pkey_gost94_derive(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen);
207 /* Internal functions for signature algorithms */
208 int fill_GOST94_params(DSA *dsa, int nid);
209 int fill_GOST_EC_params(EC_KEY *eckey, int nid);
210 int gost_sign_keygen(DSA *dsa);
211 int gost_ec_keygen(EC_KEY *ec);
213 DSA_SIG *gost_do_sign(const unsigned char *dgst, int dlen, DSA *dsa);
214 DSA_SIG *gost_ec_sign(const unsigned char *dgst, int dlen, EC_KEY *eckey);
216 int gost_do_verify(const unsigned char *dgst, int dgst_len,
217 DSA_SIG *sig, DSA *dsa);
218 int gost_ec_verify(const unsigned char *dgst, int dgst_len,
219 DSA_SIG *sig, EC_KEY *ec);
220 int gost_ec_compute_public(EC_KEY *ec);
221 int gost94_compute_public(DSA *dsa);
222 /*============== miscellaneous functions============================= */
223 /* from gost_sign.c */
224 /* Convert GOST R 34.11 hash sum to bignum according to standard */
225 BIGNUM *hashsum2bn(const unsigned char *dgst, int len);
227 * Store bignum in byte array of given length, prepending by zeros if
230 int store_bignum(BIGNUM *bn, unsigned char *buf, int len);
231 /* Read bignum, which can have few MSB all-zeros from buffer*/
232 BIGNUM *getbnfrombuf(const unsigned char *buf, size_t len);
233 /* Pack GOST R 34.10 signature according to CryptoPro rules */
234 int pack_sign_cp(DSA_SIG *s, int order, unsigned char *sig, size_t *siglen);
235 /* Unpack GOST R 34.10 signature according to CryptoPro rules */
236 DSA_SIG *unpack_cp_signature(const unsigned char *sig, size_t siglen);
238 /* Get private key as BIGNUM from both R 34.10-94 and R 34.10-2001 keys*/
239 /* Returns pointer into EVP_PKEY structure */
240 BIGNUM *gost_get0_priv_key(const EVP_PKEY *pkey);
241 /* Find NID by GOST 94 parameters */
242 int gost94_nid_by_params(DSA *p);