1 /**********************************************************************
3 * Copyright (c) 2005-2006 Cryptocom LTD *
4 * This file is distributed under the same license as OpenSSL *
6 * Implementation of RFC 4357 (GOST R 34.10) Publick key method *
8 * Requires OpenSSL 0.9.9 for compilation *
9 **********************************************************************/
10 #include <openssl/evp.h>
11 #include <openssl/objects.h>
12 #include <openssl/ec.h>
13 #include <openssl/x509v3.h> /*For string_to_hex */
17 #include "gost_params.h"
19 #include "e_gost_err.h"
20 /*-------init, cleanup, copy - uniform for all algs ---------------*/
21 /* Allocates new gost_pmeth_data structure and assigns it as data */
22 static int pkey_gost_init(EVP_PKEY_CTX *ctx)
24 struct gost_pmeth_data *data;
25 EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(ctx);
26 data = OPENSSL_malloc(sizeof(struct gost_pmeth_data));
28 memset(data,0,sizeof(struct gost_pmeth_data));
29 if (pkey && EVP_PKEY_get0(pkey))
31 switch (EVP_PKEY_base_id(pkey)) {
32 case NID_id_GostR3410_94:
33 data->sign_param_nid = gost94_nid_by_params(EVP_PKEY_get0(pkey));
35 case NID_id_GostR3410_2001:
36 data->sign_param_nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(EVP_PKEY_get0((EVP_PKEY *)pkey)));
42 EVP_PKEY_CTX_set_data(ctx,data);
46 /* Copies contents of gost_pmeth_data structure */
47 static int pkey_gost_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
49 struct gost_pmeth_data *dst_data,*src_data;
50 if (!pkey_gost_init(dst))
54 src_data = EVP_PKEY_CTX_get_data(src);
55 dst_data = EVP_PKEY_CTX_get_data(dst);
56 *dst_data = *src_data;
57 if (src_data -> shared_ukm) {
58 dst_data->shared_ukm=NULL;
63 /* Frees up gost_pmeth_data structure */
64 static void pkey_gost_cleanup (EVP_PKEY_CTX *ctx)
66 struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx);
67 if (data->shared_ukm) OPENSSL_free(data->shared_ukm);
71 /* --------------------- control functions ------------------------------*/
72 static int pkey_gost_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
74 struct gost_pmeth_data *pctx = (struct gost_pmeth_data*)EVP_PKEY_CTX_get_data(ctx);
77 case EVP_PKEY_CTRL_MD:
79 if (EVP_MD_type((const EVP_MD *)p2) != NID_id_GostR3411_94)
81 GOSTerr(GOST_F_PKEY_GOST_CTRL, GOST_R_INVALID_DIGEST_TYPE);
84 pctx->md = (EVP_MD *)p2;
89 case EVP_PKEY_CTRL_PKCS7_ENCRYPT:
90 case EVP_PKEY_CTRL_PKCS7_DECRYPT:
91 case EVP_PKEY_CTRL_PKCS7_SIGN:
94 case EVP_PKEY_CTRL_GOST_PARAMSET:
95 pctx->sign_param_nid = (int)p1;
97 case EVP_PKEY_CTRL_SET_IV:
98 pctx->shared_ukm=OPENSSL_malloc((int)p1);
99 memcpy(pctx->shared_ukm,p2,(int) p1);
107 static int pkey_gost_ctrl94_str(EVP_PKEY_CTX *ctx,
108 const char *type, const char *value)
111 if(!strcmp(type, param_ctrl_string))
117 if (strlen(value) == 1)
119 switch(toupper(value[0]))
122 param_nid = NID_id_GostR3410_94_CryptoPro_A_ParamSet;
125 param_nid = NID_id_GostR3410_94_CryptoPro_B_ParamSet;
128 param_nid = NID_id_GostR3410_94_CryptoPro_C_ParamSet;
131 param_nid = NID_id_GostR3410_94_CryptoPro_D_ParamSet;
138 else if ((strlen(value) == 2) && (toupper(value[0]) == 'X'))
140 switch (toupper(value[1]))
143 param_nid = NID_id_GostR3410_94_CryptoPro_XchA_ParamSet;
146 param_nid = NID_id_GostR3410_94_CryptoPro_XchB_ParamSet;
149 param_nid = NID_id_GostR3410_94_CryptoPro_XchC_ParamSet;
158 R3410_params *p = R3410_paramset;
159 param_nid = OBJ_txt2nid(value);
160 if (param_nid == NID_undef)
164 for (;p->nid != NID_undef;p++)
166 if (p->nid == param_nid) break;
168 if (p->nid == NID_undef)
170 GOSTerr(GOST_F_PKEY_GOST_CTRL94_STR,
171 GOST_R_INVALID_PARAMSET);
176 return pkey_gost_ctrl(ctx, EVP_PKEY_CTRL_GOST_PARAMSET,
182 static int pkey_gost_ctrl01_str(EVP_PKEY_CTX *ctx,
183 const char *type, const char *value)
186 if(!strcmp(type, param_ctrl_string))
192 if (strlen(value) == 1)
194 switch(toupper(value[0]))
197 param_nid = NID_id_GostR3410_2001_CryptoPro_A_ParamSet;
200 param_nid = NID_id_GostR3410_2001_CryptoPro_B_ParamSet;
203 param_nid = NID_id_GostR3410_2001_CryptoPro_C_ParamSet;
206 param_nid = NID_id_GostR3410_2001_TestParamSet;
213 else if ((strlen(value) == 2) && (toupper(value[0]) == 'X'))
215 switch (toupper(value[1]))
218 param_nid = NID_id_GostR3410_2001_CryptoPro_XchA_ParamSet;
221 param_nid = NID_id_GostR3410_2001_CryptoPro_XchB_ParamSet;
230 R3410_2001_params *p = R3410_2001_paramset;
231 param_nid = OBJ_txt2nid(value);
232 if (param_nid == NID_undef)
236 for (;p->nid != NID_undef;p++)
238 if (p->nid == param_nid) break;
240 if (p->nid == NID_undef)
242 GOSTerr(GOST_F_PKEY_GOST_CTRL01_STR,
243 GOST_R_INVALID_PARAMSET);
248 return pkey_gost_ctrl(ctx, EVP_PKEY_CTRL_GOST_PARAMSET,
254 /* --------------------- key generation --------------------------------*/
256 static int pkey_gost_paramgen_init(EVP_PKEY_CTX *ctx) {
259 static int pkey_gost94_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
261 struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx);
263 if (data->sign_param_nid == NID_undef)
265 GOSTerr(GOST_F_PKEY_GOST94_PARAMGEN,
266 GOST_R_NO_PARAMETERS_SET);
270 if (!fill_GOST94_params(dsa,data->sign_param_nid))
275 EVP_PKEY_assign(pkey,NID_id_GostR3410_94,dsa);
278 static int pkey_gost01_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
280 struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx);
283 if (data->sign_param_nid == NID_undef)
285 GOSTerr(GOST_F_PKEY_GOST01_PARAMGEN,
286 GOST_R_NO_PARAMETERS_SET);
291 if (!fill_GOST2001_params(ec,data->sign_param_nid))
296 EVP_PKEY_assign(pkey,NID_id_GostR3410_2001,ec);
300 /* Generates Gost_R3410_94_cp key */
301 static int pkey_gost94cp_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
304 if (!pkey_gost94_paramgen(ctx,pkey)) return 0;
305 dsa = EVP_PKEY_get0(pkey);
306 gost_sign_keygen(dsa);
310 /* Generates GOST_R3410 2001 key and assigns it using specified type */
311 static int pkey_gost01cp_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
314 if (!pkey_gost01_paramgen(ctx,pkey)) return 0;
315 ec = EVP_PKEY_get0(pkey);
322 /* ----------- sign callbacks --------------------------------------*/
324 static int pkey_gost94_cp_sign(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
325 const unsigned char *tbs, size_t tbs_len)
327 DSA_SIG *unpacked_sig=NULL;
328 EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(ctx);
329 if (!siglen) return 0;
332 *siglen= 64; /* better to check size of pkey->pkey.dsa-q */
335 unpacked_sig = gost_do_sign(tbs,tbs_len,EVP_PKEY_get0(pkey));
340 return pack_sign_cp(unpacked_sig,32,sig,siglen);
343 static int pkey_gost01_cp_sign(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
344 const unsigned char *tbs, size_t tbs_len)
346 DSA_SIG *unpacked_sig=NULL;
347 EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(ctx);
348 if (!siglen) return 0;
351 *siglen= 64; /* better to check size of curve order*/
354 unpacked_sig = gost2001_do_sign(tbs,tbs_len,EVP_PKEY_get0(pkey));
359 return pack_sign_cp(unpacked_sig,32,sig,siglen);
362 /* ------------------- verify callbacks ---------------------------*/
364 static int pkey_gost94_cp_verify(EVP_PKEY_CTX *ctx, const unsigned char *sig,
365 size_t siglen, const unsigned char *tbs, size_t tbs_len)
368 EVP_PKEY* pub_key = EVP_PKEY_CTX_get0_pkey(ctx);
369 DSA_SIG *s=unpack_cp_signature(sig,siglen);
371 if (pub_key) ok = gost_do_verify(tbs,tbs_len,s,EVP_PKEY_get0(pub_key));
377 static int pkey_gost01_cp_verify(EVP_PKEY_CTX *ctx, const unsigned char *sig,
378 size_t siglen, const unsigned char *tbs, size_t tbs_len)
381 EVP_PKEY* pub_key = EVP_PKEY_CTX_get0_pkey(ctx);
382 DSA_SIG *s=unpack_cp_signature(sig,siglen);
385 fprintf(stderr,"R=");
386 BN_print_fp(stderr,s->r);
387 fprintf(stderr,"\nS=");
388 BN_print_fp(stderr,s->s);
389 fprintf(stderr,"\n");
391 if (pub_key) ok = gost2001_do_verify(tbs,tbs_len,s,EVP_PKEY_get0(pub_key));
396 /* ------------- encrypt init -------------------------------------*/
397 /* Generates ephermeral key */
398 static int pkey_gost_encrypt_init(EVP_PKEY_CTX *ctx)
402 /* --------------- Derive init ------------------------------------*/
403 static int pkey_gost_derive_init(EVP_PKEY_CTX *ctx)
407 /* -------- PKEY_METHOD for GOST MAC algorithm --------------------*/
408 static int pkey_gost_mac_init(EVP_PKEY_CTX *ctx)
410 struct gost_mac_pmeth_data *data;
411 data = OPENSSL_malloc(sizeof(struct gost_mac_pmeth_data));
413 memset(data,0,sizeof(struct gost_mac_pmeth_data));
414 EVP_PKEY_CTX_set_data(ctx,data);
417 static void pkey_gost_mac_cleanup (EVP_PKEY_CTX *ctx)
419 struct gost_mac_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx);
422 static int pkey_gost_mac_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
424 struct gost_mac_pmeth_data *dst_data,*src_data;
425 if (!pkey_gost_mac_init(dst))
429 src_data = EVP_PKEY_CTX_get_data(src);
430 dst_data = EVP_PKEY_CTX_get_data(dst);
431 *dst_data = *src_data;
435 static int pkey_gost_mac_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
437 struct gost_mac_pmeth_data *data =
438 (struct gost_mac_pmeth_data*)EVP_PKEY_CTX_get_data(ctx);
442 case EVP_PKEY_CTRL_MD:
444 if (EVP_MD_type((const EVP_MD *)p2) != NID_id_Gost28147_89_MAC)
446 GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL, GOST_R_INVALID_DIGEST_TYPE);
449 data->md = (EVP_MD *)p2;
454 case EVP_PKEY_CTRL_PKCS7_ENCRYPT:
455 case EVP_PKEY_CTRL_PKCS7_DECRYPT:
456 case EVP_PKEY_CTRL_PKCS7_SIGN:
458 case EVP_PKEY_CTRL_SET_MAC_KEY:
461 GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL,
462 GOST_R_INVALID_MAC_KEY_LENGTH);
466 memcpy(data->key,p2,32);
469 case EVP_PKEY_CTRL_DIGESTINIT:
471 EVP_MD_CTX *mctx = p2;
475 EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(ctx);
478 GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL,GOST_R_MAC_KEY_NOT_SET);
481 key = EVP_PKEY_get0(pkey);
484 GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL,GOST_R_MAC_KEY_NOT_SET);
490 return mctx->digest->md_ctrl(mctx,EVP_MD_CTRL_SET_KEY,32,key);
495 static int pkey_gost_mac_ctrl_str(EVP_PKEY_CTX *ctx,
496 const char *type, const char *value)
498 if (!strcmp(type, key_ctrl_string))
500 if (strlen(value)!=32)
502 GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL_STR,
503 GOST_R_INVALID_MAC_KEY_LENGTH);
506 return pkey_gost_mac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY,
509 if (!strcmp(type, hexkey_ctrl_string))
511 long keylen; int ret;
512 unsigned char *keybuf=string_to_hex(value,&keylen);
515 GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL_STR,
516 GOST_R_INVALID_MAC_KEY_LENGTH);
519 ret= pkey_gost_mac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY,
521 OPENSSL_free(keybuf);
528 static int pkey_gost_mac_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
530 struct gost_mac_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx);
531 unsigned char *keydata;
534 GOSTerr(GOST_F_PKEY_GOST_MAC_KEYGEN,GOST_R_MAC_KEY_NOT_SET);
537 keydata = OPENSSL_malloc(32);
538 memcpy(keydata,data->key,32);
539 EVP_PKEY_assign(pkey, NID_id_Gost28147_89_MAC, keydata);
543 static int pkey_gost_mac_signctx_init(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx)
548 static int pkey_gost_mac_signctx(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen, EVP_MD_CTX *mctx)
550 unsigned int tmpsiglen=*siglen; /* for platforms where sizeof(int)!=sizeof(size_t)*/
557 ret=EVP_DigestFinal_ex(mctx,sig,&tmpsiglen);
561 /* ----------------------------------------------------------------*/
562 int register_pmeth_gost(int id, EVP_PKEY_METHOD **pmeth,int flags)
564 *pmeth = EVP_PKEY_meth_new(id, flags);
565 if (!*pmeth) return 0;
569 case NID_id_GostR3410_94:
570 EVP_PKEY_meth_set_ctrl(*pmeth,pkey_gost_ctrl, pkey_gost_ctrl94_str);
571 EVP_PKEY_meth_set_keygen(*pmeth,NULL,pkey_gost94cp_keygen);
572 EVP_PKEY_meth_set_sign(*pmeth, NULL, pkey_gost94_cp_sign);
573 EVP_PKEY_meth_set_verify(*pmeth, NULL, pkey_gost94_cp_verify);
574 EVP_PKEY_meth_set_encrypt(*pmeth,
575 pkey_gost_encrypt_init, pkey_GOST94cp_encrypt);
576 EVP_PKEY_meth_set_decrypt(*pmeth, NULL, pkey_GOST94cp_decrypt);
577 EVP_PKEY_meth_set_derive(*pmeth,
578 pkey_gost_derive_init, pkey_gost94_derive);
579 EVP_PKEY_meth_set_paramgen(*pmeth, pkey_gost_paramgen_init,pkey_gost94_paramgen);
581 case NID_id_GostR3410_2001:
582 EVP_PKEY_meth_set_ctrl(*pmeth,pkey_gost_ctrl, pkey_gost_ctrl01_str);
583 EVP_PKEY_meth_set_sign(*pmeth, NULL, pkey_gost01_cp_sign);
584 EVP_PKEY_meth_set_verify(*pmeth, NULL, pkey_gost01_cp_verify);
586 EVP_PKEY_meth_set_keygen(*pmeth, NULL, pkey_gost01cp_keygen);
588 EVP_PKEY_meth_set_encrypt(*pmeth,
589 pkey_gost_encrypt_init, pkey_GOST01cp_encrypt);
590 EVP_PKEY_meth_set_decrypt(*pmeth, NULL, pkey_GOST01cp_decrypt);
591 EVP_PKEY_meth_set_derive(*pmeth,
592 pkey_gost_derive_init, pkey_gost2001_derive);
593 EVP_PKEY_meth_set_paramgen(*pmeth, pkey_gost_paramgen_init,pkey_gost01_paramgen);
595 case NID_id_Gost28147_89_MAC:
596 EVP_PKEY_meth_set_ctrl(*pmeth,pkey_gost_mac_ctrl, pkey_gost_mac_ctrl_str);
597 EVP_PKEY_meth_set_signctx(*pmeth,pkey_gost_mac_signctx_init, pkey_gost_mac_signctx);
598 EVP_PKEY_meth_set_keygen(*pmeth,NULL, pkey_gost_mac_keygen);
599 EVP_PKEY_meth_set_init(*pmeth,pkey_gost_mac_init);
600 EVP_PKEY_meth_set_cleanup(*pmeth,pkey_gost_mac_cleanup);
601 EVP_PKEY_meth_set_copy(*pmeth,pkey_gost_mac_copy);
603 default: /*Unsupported method*/
606 EVP_PKEY_meth_set_init(*pmeth, pkey_gost_init);
607 EVP_PKEY_meth_set_cleanup(*pmeth, pkey_gost_cleanup);
609 EVP_PKEY_meth_set_copy(*pmeth, pkey_gost_copy);
610 /*FIXME derive etc...*/