573 lines
15 KiB
C
573 lines
15 KiB
C
/**********************************************************************
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* gost_pmeth.c *
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* Copyright (c) 2005-2006 Cryptocom LTD *
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* This file is distributed under the same license as OpenSSL *
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* *
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* Implementation of RFC 4357 (GOST R 34.10) Publick key method *
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* for OpenSSL *
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* Requires OpenSSL 0.9.9 for compilation *
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**********************************************************************/
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#include <openssl/evp.h>
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#include <openssl/objects.h>
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#include <openssl/ec.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include "gost_params.h"
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#include "gost_lcl.h"
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#include "e_gost_err.h"
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/*-------init, cleanup, copy - uniform for all algs ---------------*/
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/* Allocates new gost_pmeth_data structure and assigns it as data */
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static int pkey_gost_init(EVP_PKEY_CTX *ctx)
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{
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struct gost_pmeth_data *data;
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data = OPENSSL_malloc(sizeof(struct gost_pmeth_data));
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if (!data) return 0;
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memset(data,0,sizeof(struct gost_pmeth_data));
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EVP_PKEY_CTX_set_data(ctx,data);
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return 1;
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}
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/* Copies contents of gost_pmeth_data structure */
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static int pkey_gost_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
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{
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struct gost_pmeth_data *dst_data,*src_data;
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if (!pkey_gost_init(dst))
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{
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return 0;
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}
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src_data = EVP_PKEY_CTX_get_data(src);
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dst_data = EVP_PKEY_CTX_get_data(dst);
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*dst_data = *src_data;
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if (src_data -> eph_seckey)
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{
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dst_data ->eph_seckey = NULL;
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}
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return 1;
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}
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/* Frees up gost_pmeth_data structure */
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static void pkey_gost_cleanup (EVP_PKEY_CTX *ctx)
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{
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struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx);
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if (data->eph_seckey) EVP_PKEY_free(data->eph_seckey);
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OPENSSL_free(data);
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}
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/* --------------------- control functions ------------------------------*/
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static int pkey_gost_ctrl (EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
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{
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struct gost_pmeth_data *pctx = (struct gost_pmeth_data*)EVP_PKEY_CTX_get_data(ctx);
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switch (type)
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{
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case EVP_PKEY_CTRL_MD:
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{
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if (EVP_MD_type((const EVP_MD *)p2) != NID_id_GostR3411_94)
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{
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GOSTerr(GOST_F_PKEY_GOST_CTRL, GOST_R_INVALID_DIGEST_TYPE);
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return 0;
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}
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pctx->md = (EVP_MD *)p2;
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return 1;
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}
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break;
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case EVP_PKEY_CTRL_PKCS7_ENCRYPT:
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case EVP_PKEY_CTRL_PKCS7_DECRYPT:
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case EVP_PKEY_CTRL_PKCS7_SIGN:
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return 1;
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case EVP_PKEY_CTRL_GOST_PARAMSET:
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pctx->sign_param_nid = (int)p1;
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return 1;
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}
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return -2;
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}
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static int pkey_gost_ctrl94cc_str(EVP_PKEY_CTX *ctx,
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const char *type, const char *value)
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{
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if(!strcmp(type, param_ctrl_string))
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{
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return pkey_gost_ctrl(ctx, EVP_PKEY_CTRL_GOST_PARAMSET,
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NID_id_GostR3410_94_CryptoPro_A_ParamSet,
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NULL);
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}
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return -2;
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}
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static int pkey_gost_ctrl01cc_str(EVP_PKEY_CTX *ctx,
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const char *type, const char *value)
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{
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if(!strcmp(type, param_ctrl_string))
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{
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return pkey_gost_ctrl(ctx, EVP_PKEY_CTRL_GOST_PARAMSET,
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NID_id_GostR3410_2001_ParamSet_cc,NULL);
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}
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return -2;
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}
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static int pkey_gost_ctrl94_str(EVP_PKEY_CTX *ctx,
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const char *type, const char *value)
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{
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int param_nid=0;
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if(!strcmp(type, param_ctrl_string))
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{
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if (!value)
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{
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return 0;
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}
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if (strlen(value) == 1)
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{
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switch(toupper(value[0]))
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{
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case 'A':
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param_nid = NID_id_GostR3410_94_CryptoPro_A_ParamSet;
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break;
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case 'B':
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param_nid = NID_id_GostR3410_94_CryptoPro_B_ParamSet;
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break;
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case 'C':
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param_nid = NID_id_GostR3410_94_CryptoPro_C_ParamSet;
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break;
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case 'D':
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param_nid = NID_id_GostR3410_94_CryptoPro_D_ParamSet;
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break;
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default:
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return 0;
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break;
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}
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}
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else if ((strlen(value) == 2) && (toupper(value[0]) == 'X'))
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{
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switch (toupper(value[1]))
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{
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case 'A':
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param_nid = NID_id_GostR3410_94_CryptoPro_XchA_ParamSet;
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break;
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case 'B':
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param_nid = NID_id_GostR3410_94_CryptoPro_XchB_ParamSet;
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break;
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case 'C':
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param_nid = NID_id_GostR3410_94_CryptoPro_XchC_ParamSet;
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break;
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default:
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return 0;
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break;
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}
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}
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else
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{
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R3410_params *p = R3410_paramset;
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param_nid = OBJ_txt2nid(value);
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if (param_nid == NID_undef)
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{
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return 0;
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}
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for (;p->nid != NID_undef;p++)
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{
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if (p->nid == param_nid) break;
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}
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if (p->nid == NID_undef)
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{
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GOSTerr(GOST_F_PKEY_GOST_CTRL94_STR,
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GOST_R_INVALID_PARAMSET);
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return 0;
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}
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}
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return pkey_gost_ctrl(ctx, EVP_PKEY_CTRL_GOST_PARAMSET,
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param_nid, NULL);
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}
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return -2;
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}
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static int pkey_gost_ctrl01_str(EVP_PKEY_CTX *ctx,
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const char *type, const char *value)
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{
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int param_nid=0;
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if(!strcmp(type, param_ctrl_string))
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{
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if (!value)
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{
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return 0;
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}
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if (strlen(value) == 1)
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{
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switch(toupper(value[0]))
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{
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case 'A':
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param_nid = NID_id_GostR3410_2001_CryptoPro_A_ParamSet;
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break;
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case 'B':
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param_nid = NID_id_GostR3410_2001_CryptoPro_B_ParamSet;
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break;
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case 'C':
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param_nid = NID_id_GostR3410_2001_CryptoPro_C_ParamSet;
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break;
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case '0':
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param_nid = NID_id_GostR3410_2001_TestParamSet;
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break;
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default:
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return 0;
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break;
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}
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}
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else if ((strlen(value) == 2) && (toupper(value[0]) == 'X'))
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{
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switch (toupper(value[1]))
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{
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case 'A':
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param_nid = NID_id_GostR3410_2001_CryptoPro_XchA_ParamSet;
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break;
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case 'B':
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param_nid = NID_id_GostR3410_2001_CryptoPro_XchB_ParamSet;
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break;
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default:
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return 0;
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break;
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}
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}
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else
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{
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R3410_2001_params *p = R3410_2001_paramset;
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param_nid = OBJ_txt2nid(value);
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if (param_nid == NID_undef)
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{
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return 0;
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}
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for (;p->nid != NID_undef;p++)
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{
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if (p->nid == param_nid) break;
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}
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if (p->nid == NID_undef)
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{
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GOSTerr(GOST_F_PKEY_GOST_CTRL01_STR,
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GOST_R_INVALID_PARAMSET);
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return 0;
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}
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}
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return pkey_gost_ctrl(ctx, EVP_PKEY_CTRL_GOST_PARAMSET,
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param_nid, NULL);
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}
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return -2;
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}
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/* --------------------- key generation --------------------------------*/
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/* Generates GOST 94 key and assigns it setting specified type */
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static int pkey_gost94_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey,int type)
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{
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struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx);
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DSA *dsa=NULL;
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if (data->sign_param_nid == NID_undef)
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{
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if (type== NID_id_GostR3410_94_cc)
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{
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data->sign_param_nid = NID_id_GostR3410_94_CryptoPro_A_ParamSet;
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}
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else
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{
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GOSTerr(GOST_F_PKEY_GOST94_KEYGEN,
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GOST_R_NO_PARAMETERS_SET);
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return 0;
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}
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}
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dsa = DSA_new();
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if (!fill_GOST94_params(dsa,data->sign_param_nid))
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{
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DSA_free(dsa);
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return 0;
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}
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gost_sign_keygen(dsa);
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EVP_PKEY_assign(pkey,type,dsa);
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return 1;
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}
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/* Generates Gost_R3410_94_cc key */
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static int pkey_gost94cc_keygen (EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
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{
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return pkey_gost94_keygen(ctx,pkey,NID_id_GostR3410_94_cc);
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}
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/* Generates Gost_R3410_94_cp key */
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static int pkey_gost94cp_keygen (EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
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{
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return pkey_gost94_keygen(ctx,pkey,NID_id_GostR3410_94);
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}
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/* Generates GOST_R3410 2001 key and assigns it using specified type */
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static int pkey_gost01_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey,int type)
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{
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struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx);
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EC_KEY *ec=NULL;
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if (data->sign_param_nid == NID_undef)
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{
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if (type == NID_id_GostR3410_2001_cc)
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{
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data->sign_param_nid = NID_id_GostR3410_2001_ParamSet_cc;
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}
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else {
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GOSTerr(GOST_F_PKEY_GOST01_KEYGEN,
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GOST_R_NO_PARAMETERS_SET);
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return 0;
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}
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}
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ec = EC_KEY_new();
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if (!fill_GOST2001_params(ec,data->sign_param_nid))
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{
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EC_KEY_free(ec);
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return 0;
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}
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gost2001_keygen(ec);
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EVP_PKEY_assign(pkey,type,ec);
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return 1;
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}
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/* Generates GOST R3410 2001_cc key */
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static int pkey_gost01cc_keygen (EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
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{
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return pkey_gost01_keygen(ctx,pkey,NID_id_GostR3410_2001_cc);
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}
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/* Generates GOST R3410 2001_cp key */
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static int pkey_gost01cp_keygen (EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
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{
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return pkey_gost01_keygen(ctx,pkey,NID_id_GostR3410_2001);
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}
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/* ----------- sign callbacks --------------------------------------*/
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static int pkey_gost94_cc_sign(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
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const unsigned char *tbs, size_t tbs_len)
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{
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DSA_SIG *unpacked_sig=NULL;
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EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(ctx);
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if (!siglen) return 0;
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if (!sig)
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{
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*siglen= 64; /* better to check size of pkey->pkey.dsa-q */
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return 1;
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}
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unpacked_sig = gost_do_sign(tbs,tbs_len,EVP_PKEY_get0(pkey));
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if (!unpacked_sig)
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{
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return 0;
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}
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return pack_sign_cc(unpacked_sig,32,sig,siglen);
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}
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static int pkey_gost94_cp_sign(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
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const unsigned char *tbs, size_t tbs_len)
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{
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DSA_SIG *unpacked_sig=NULL;
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EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(ctx);
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if (!siglen) return 0;
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if (!sig)
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{
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*siglen= 64; /* better to check size of pkey->pkey.dsa-q */
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return 1;
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}
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unpacked_sig = gost_do_sign(tbs,tbs_len,EVP_PKEY_get0(pkey));
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if (!unpacked_sig)
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{
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return 0;
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}
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return pack_sign_cp(unpacked_sig,32,sig,siglen);
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}
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static int pkey_gost01_cc_sign(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
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const unsigned char *tbs, size_t tbs_len)
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{
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DSA_SIG *unpacked_sig=NULL;
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EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(ctx);
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if (!siglen) return 0;
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if (!sig)
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{
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*siglen= 64; /* better to check size of curve order*/
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return 1;
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}
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unpacked_sig = gost2001_do_sign(tbs,tbs_len,EVP_PKEY_get0(pkey));
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if (!unpacked_sig)
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{
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return 0;
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}
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return pack_sign_cc(unpacked_sig,32,sig,siglen);
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}
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static int pkey_gost01_cp_sign(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
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const unsigned char *tbs, size_t tbs_len)
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{
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DSA_SIG *unpacked_sig=NULL;
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EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(ctx);
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if (!siglen) return 0;
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if (!sig)
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{
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*siglen= 64; /* better to check size of curve order*/
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return 1;
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}
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unpacked_sig = gost2001_do_sign(tbs,tbs_len,EVP_PKEY_get0(pkey));
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if (!unpacked_sig)
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{
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return 0;
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}
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return pack_sign_cp(unpacked_sig,32,sig,siglen);
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}
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/* ------------------- verify callbacks ---------------------------*/
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static int pkey_gost94_cc_verify(EVP_PKEY_CTX *ctx, const unsigned char *sig,
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size_t siglen, const unsigned char *tbs, size_t tbs_len)
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{
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int ok = 0;
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EVP_PKEY* pub_key = EVP_PKEY_CTX_get0_pkey(ctx);
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DSA_SIG *s=unpack_cc_signature(sig,siglen);
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if (!s) return 0;
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if (pub_key) ok = gost_do_verify(tbs,tbs_len,s,EVP_PKEY_get0(pub_key));
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DSA_SIG_free(s);
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return ok;
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}
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static int pkey_gost94_cp_verify(EVP_PKEY_CTX *ctx, const unsigned char *sig,
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size_t siglen, const unsigned char *tbs, size_t tbs_len)
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{
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int ok = 0;
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EVP_PKEY* pub_key = EVP_PKEY_CTX_get0_pkey(ctx);
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DSA_SIG *s=unpack_cp_signature(sig,siglen);
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if (!s) return 0;
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if (pub_key) ok = gost_do_verify(tbs,tbs_len,s,EVP_PKEY_get0(pub_key));
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DSA_SIG_free(s);
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return ok;
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}
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static int pkey_gost01_cc_verify(EVP_PKEY_CTX *ctx, const unsigned char *sig,
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size_t siglen, const unsigned char *tbs, size_t tbs_len)
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{
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int ok = 0;
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EVP_PKEY* pub_key = EVP_PKEY_CTX_get0_pkey(ctx);
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DSA_SIG *s=unpack_cc_signature(sig,siglen);
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#ifdef DEBUG_SIGN
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fprintf(stderr,"R=");
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BN_print_fp(stderr,s->r);
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fprintf(stderr,"\nS=");
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BN_print_fp(stderr,s->s);
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fprintf(stderr,"\n");
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#endif
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if (!s) return 0;
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if (pub_key) ok = gost2001_do_verify(tbs,tbs_len,s,EVP_PKEY_get0(pub_key));
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DSA_SIG_free(s);
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return ok;
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}
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static int pkey_gost01_cp_verify(EVP_PKEY_CTX *ctx, const unsigned char *sig,
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size_t siglen, const unsigned char *tbs, size_t tbs_len)
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{
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int ok = 0;
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EVP_PKEY* pub_key = EVP_PKEY_CTX_get0_pkey(ctx);
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DSA_SIG *s=unpack_cp_signature(sig,siglen);
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if (!s) return 0;
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#ifdef DEBUG_SIGN
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fprintf(stderr,"R=");
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BN_print_fp(stderr,s->r);
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fprintf(stderr,"\nS=");
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BN_print_fp(stderr,s->s);
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fprintf(stderr,"\n");
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#endif
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if (pub_key) ok = gost2001_do_verify(tbs,tbs_len,s,EVP_PKEY_get0(pub_key));
|
|
DSA_SIG_free(s);
|
|
return ok;
|
|
}
|
|
|
|
/* ------------- encrypt init -------------------------------------*/
|
|
/* Generates ephermeral key */
|
|
static int pkey_gost_encrypt_init(EVP_PKEY_CTX *ctx)
|
|
{
|
|
struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx);
|
|
EVP_PKEY *eph_key = EVP_PKEY_new();
|
|
EVP_PKEY *old_key =EVP_PKEY_CTX_get0_pkey(ctx);
|
|
|
|
if (data->eph_seckey) EVP_PKEY_free(data->eph_seckey);
|
|
EVP_PKEY_assign(eph_key,EVP_PKEY_base_id(old_key),NULL);
|
|
if (!EVP_PKEY_copy_parameters(eph_key,old_key)) return 0;
|
|
switch (EVP_PKEY_base_id(old_key))
|
|
{
|
|
case NID_id_GostR3410_2001:
|
|
case NID_id_GostR3410_2001_cc:
|
|
gost2001_keygen(EVP_PKEY_get0(eph_key));
|
|
break;
|
|
case NID_id_GostR3410_94:
|
|
case NID_id_GostR3410_94_cc:
|
|
gost_sign_keygen(EVP_PKEY_get0(eph_key));
|
|
break;
|
|
|
|
|
|
}
|
|
|
|
|
|
data->eph_seckey=eph_key;
|
|
return 1;
|
|
}
|
|
|
|
/* ----------------------------------------------------------------*/
|
|
int register_pmeth_gost(int id, EVP_PKEY_METHOD **pmeth,int flags)
|
|
{
|
|
*pmeth = EVP_PKEY_meth_new(id, flags);
|
|
if (!*pmeth) return 0;
|
|
|
|
switch (id)
|
|
{
|
|
case NID_id_GostR3410_94_cc:
|
|
EVP_PKEY_meth_set_ctrl(*pmeth,pkey_gost_ctrl, pkey_gost_ctrl94cc_str);
|
|
EVP_PKEY_meth_set_keygen(*pmeth,NULL,pkey_gost94cc_keygen);
|
|
EVP_PKEY_meth_set_sign(*pmeth, NULL, pkey_gost94_cc_sign);
|
|
EVP_PKEY_meth_set_verify(*pmeth, NULL, pkey_gost94_cc_verify);
|
|
EVP_PKEY_meth_set_encrypt(*pmeth,
|
|
pkey_gost_encrypt_init, pkey_GOST94cc_encrypt);
|
|
EVP_PKEY_meth_set_decrypt(*pmeth, NULL, pkey_GOST94cc_decrypt);
|
|
break;
|
|
case NID_id_GostR3410_94:
|
|
EVP_PKEY_meth_set_ctrl(*pmeth,pkey_gost_ctrl, pkey_gost_ctrl94_str);
|
|
EVP_PKEY_meth_set_keygen(*pmeth,NULL,pkey_gost94cp_keygen);
|
|
EVP_PKEY_meth_set_sign(*pmeth, NULL, pkey_gost94_cp_sign);
|
|
EVP_PKEY_meth_set_verify(*pmeth, NULL, pkey_gost94_cp_verify);
|
|
EVP_PKEY_meth_set_encrypt(*pmeth,
|
|
pkey_gost_encrypt_init, pkey_GOST94cp_encrypt);
|
|
EVP_PKEY_meth_set_decrypt(*pmeth, NULL, pkey_GOST94cp_decrypt);
|
|
|
|
|
|
break;
|
|
case NID_id_GostR3410_2001_cc:
|
|
EVP_PKEY_meth_set_ctrl(*pmeth,pkey_gost_ctrl, pkey_gost_ctrl01cc_str);
|
|
EVP_PKEY_meth_set_sign(*pmeth, NULL, pkey_gost01_cc_sign);
|
|
EVP_PKEY_meth_set_verify(*pmeth, NULL, pkey_gost01_cc_verify);
|
|
|
|
EVP_PKEY_meth_set_keygen(*pmeth, NULL, pkey_gost01cc_keygen);
|
|
|
|
EVP_PKEY_meth_set_encrypt(*pmeth,
|
|
pkey_gost_encrypt_init, pkey_GOST01cc_encrypt);
|
|
EVP_PKEY_meth_set_decrypt(*pmeth, NULL, pkey_GOST01cc_decrypt);
|
|
break;
|
|
/* There is intentionally no break here */
|
|
case NID_id_GostR3410_2001:
|
|
EVP_PKEY_meth_set_ctrl(*pmeth,pkey_gost_ctrl, pkey_gost_ctrl01_str);
|
|
EVP_PKEY_meth_set_sign(*pmeth, NULL, pkey_gost01_cp_sign);
|
|
EVP_PKEY_meth_set_verify(*pmeth, NULL, pkey_gost01_cp_verify);
|
|
|
|
EVP_PKEY_meth_set_keygen(*pmeth, NULL, pkey_gost01cp_keygen);
|
|
|
|
EVP_PKEY_meth_set_encrypt(*pmeth,
|
|
pkey_gost_encrypt_init, pkey_GOST01cp_encrypt);
|
|
EVP_PKEY_meth_set_decrypt(*pmeth, NULL, pkey_GOST01cp_decrypt);
|
|
break;
|
|
default: /*Unsupported method*/
|
|
return 0;
|
|
}
|
|
EVP_PKEY_meth_set_init(*pmeth, pkey_gost_init);
|
|
EVP_PKEY_meth_set_cleanup(*pmeth, pkey_gost_cleanup);
|
|
|
|
EVP_PKEY_meth_set_copy(*pmeth, pkey_gost_copy);
|
|
/*FIXME derive etc...*/
|
|
|
|
return 1;
|
|
}
|
|
|