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>
22 /* Control commands */
23 #define GOST_PARAM_CRYPT_PARAMS 0
24 #define GOST_PARAM_MAX 0
25 #define GOST_CTRL_CRYPT_PARAMS (ENGINE_CMD_BASE+GOST_PARAM_CRYPT_PARAMS)
27 extern const ENGINE_CMD_DEFN gost_cmds[];
28 int gost_control_func(ENGINE *e,int cmd, long i, void *p, void (*f)(void));
29 const char *get_gost_engine_param(int param);
30 int gost_set_default_param(int param, const char *value);
31 void gost_param_free(void);
33 /* method registration */
35 int register_ameth_gost (int nid, EVP_PKEY_ASN1_METHOD **ameth, const char* pemstr, const char* info);
36 int register_pmeth_gost (int id, EVP_PKEY_METHOD **pmeth, int flags);
38 /* Gost-specific pmeth control-function parameters */
39 /* For GOST R34.10 parameters */
40 #define param_ctrl_string "paramset"
41 #define EVP_PKEY_CTRL_GOST_PARAMSET (EVP_PKEY_ALG_CTRL+1)
42 /* For GOST 28147 MAC */
43 #define key_ctrl_string "key"
44 #define hexkey_ctrl_string "hexkey"
45 #define EVP_PKEY_CTRL_GOST_MAC_HEXKEY (EVP_PKEY_ALG_CTRL+3)
46 /* Pmeth internal representation */
47 struct gost_pmeth_data {
48 int sign_param_nid; /* Should be set whenever parameters are filled */
50 unsigned char *shared_ukm;
53 struct gost_mac_pmeth_data {
56 unsigned char key[32];
58 /* GOST-specific ASN1 structures */
62 ASN1_OCTET_STRING *encrypted_key;
63 ASN1_OCTET_STRING *imit;
66 DECLARE_ASN1_FUNCTIONS(GOST_KEY_INFO)
70 X509_PUBKEY *ephem_key;
71 ASN1_OCTET_STRING *eph_iv;
72 } GOST_KEY_AGREEMENT_INFO;
74 DECLARE_ASN1_FUNCTIONS(GOST_KEY_AGREEMENT_INFO)
77 GOST_KEY_INFO *key_info;
78 GOST_KEY_AGREEMENT_INFO *key_agreement_info;
81 DECLARE_ASN1_FUNCTIONS(GOST_KEY_TRANSPORT)
83 typedef struct { /* FIXME incomplete */
84 GOST_KEY_TRANSPORT *gkt;
85 } GOST_CLIENT_KEY_EXCHANGE_PARAMS;
87 DECLARE_ASN1_FUNCTIONS(GOST_CLIENT_KEY_EXCHANGE_PARAMS)
89 ASN1_OBJECT *key_params;
90 ASN1_OBJECT *hash_params;
91 ASN1_OBJECT *cipher_params;
94 DECLARE_ASN1_FUNCTIONS(GOST_KEY_PARAMS)
97 ASN1_OCTET_STRING *iv;
98 ASN1_OBJECT *enc_param_set;
101 DECLARE_ASN1_FUNCTIONS(GOST_CIPHER_PARAMS)
102 /*============== Message digest and cipher related structures ==========*/
103 /* Structure used as EVP_MD_CTX-md_data.
104 * It allows to avoid storing in the md-data pointers to
105 * dynamically allocated memory.
107 * I cannot invent better way to avoid memory leaks, because
108 * openssl insist on invoking Init on Final-ed digests, and there
109 * is no reliable way to find out whether pointer in the passed
110 * md_data is valid or not.
112 struct ossl_gost_digest_ctx {
116 /* EVP_MD structure for GOST R 34.11 */
117 extern EVP_MD digest_gost;
118 /* EVP_MD structure for GOST 28147 in MAC mode */
119 extern EVP_MD imit_gost_cpa;
120 /* Cipher context used for EVP_CIPHER operation */
121 struct ossl_gost_cipher_ctx {
127 /* Structure to map parameter NID to S-block */
128 struct gost_cipher_info {
130 gost_subst_block *sblock;
133 /* Context for MAC */
134 struct ossl_gost_imit_ctx {
136 unsigned char buffer[8];
137 unsigned char partial_block[8];
143 /* Table which maps parameter NID to S-blocks */
144 extern struct gost_cipher_info gost_cipher_list[];
145 /* Find encryption params from ASN1_OBJECT */
146 const struct gost_cipher_info *get_encryption_params(ASN1_OBJECT *obj);
147 /* Implementation of GOST 28147-89 cipher in CFB and CNT modes */
148 extern EVP_CIPHER cipher_gost;
149 extern EVP_CIPHER cipher_gost_cpacnt;
150 #define EVP_MD_CTRL_KEY_LEN (EVP_MD_CTRL_ALG_CTRL+3)
151 #define EVP_MD_CTRL_SET_KEY (EVP_MD_CTRL_ALG_CTRL+4)
152 /* EVP_PKEY_METHOD key encryption callbacks */
153 /* From gost94_keyx.c */
154 int pkey_GOST94cp_encrypt(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen, const unsigned char* key, size_t key_len );
156 int pkey_GOST94cp_decrypt(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen, const unsigned char* in, size_t in_len );
157 /* From gost2001_keyx.c */
158 int pkey_GOST01cp_encrypt(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen, const unsigned char* key, size_t key_len );
160 int pkey_GOST01cp_decrypt(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen, const unsigned char* in, size_t in_len );
161 /* derive functions */
162 /* From gost2001_keyx.c */
163 int pkey_gost2001_derive(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen);
164 /* From gost94_keyx.c */
165 int pkey_gost94_derive(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen);
166 /* Internal functions for signature algorithms */
167 int fill_GOST94_params(DSA *dsa,int nid);
168 int fill_GOST2001_params(EC_KEY *eckey, int nid);
169 int gost_sign_keygen(DSA *dsa) ;
170 int gost2001_keygen(EC_KEY *ec) ;
172 DSA_SIG *gost_do_sign(const unsigned char *dgst,int dlen, DSA *dsa) ;
173 DSA_SIG *gost2001_do_sign(const unsigned char *dgst,int dlen, EC_KEY *eckey);
175 int gost_do_verify(const unsigned char *dgst, int dgst_len,
176 DSA_SIG *sig, DSA *dsa) ;
177 int gost2001_do_verify(const unsigned char *dgst,int dgst_len,
178 DSA_SIG *sig, EC_KEY *ec);
179 int gost2001_compute_public(EC_KEY *ec) ;
180 int gost94_compute_public(DSA *dsa) ;
181 /*============== miscellaneous functions============================= */
182 /* from gost_sign.c */
183 /* Convert GOST R 34.11 hash sum to bignum according to standard */
184 BIGNUM *hashsum2bn(const unsigned char *dgst) ;
185 /* Store bignum in byte array of given length, prepending by zeros
187 int store_bignum(BIGNUM *bn, unsigned char *buf,int len);
188 /* Read bignum, which can have few MSB all-zeros from buffer*/
189 BIGNUM *getbnfrombuf(const unsigned char *buf,size_t len);
190 /* Pack GOST R 34.10 signature according to CryptoPro rules */
191 int pack_sign_cp(DSA_SIG *s,int order,unsigned char *sig, size_t *siglen);
192 /* Unpack GOST R 34.10 signature according to CryptoPro rules */
193 DSA_SIG *unpack_cp_signature(const unsigned char *sig,size_t siglen) ;
195 /* Get private key as BIGNUM from both R 34.10-94 and R 34.10-2001 keys*/
196 /* Returns pointer into EVP_PKEY structure */
197 BIGNUM* gost_get0_priv_key(const EVP_PKEY *pkey) ;
198 /* Find NID by GOST 94 parameters */
199 int gost94_nid_by_params(DSA *p) ;