580 lines
14 KiB
C
580 lines
14 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 <openssl/x509v3.h> /*For string_to_hex */
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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 -> shared_ukm) {
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dst_data->shared_ukm=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->shared_ukm) OPENSSL_free(data->shared_ukm);
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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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case EVP_PKEY_CTRL_SET_IV:
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pctx->shared_ukm=OPENSSL_malloc((int)p1);
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memcpy(pctx->shared_ukm,p2,(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_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_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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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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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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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,NID_id_GostR3410_94,dsa);
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return 1;
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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_gost01cp_keygen (EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
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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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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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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,NID_id_GostR3410_2001,ec);
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return 1;
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}
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/* ----------- sign callbacks --------------------------------------*/
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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_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_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_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));
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DSA_SIG_free(s);
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return ok;
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}
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/* ------------- encrypt init -------------------------------------*/
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/* Generates ephermeral key */
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static int pkey_gost_encrypt_init(EVP_PKEY_CTX *ctx)
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{
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return 1;
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}
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/* --------------- Derive init ------------------------------------*/
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static int pkey_gost_derive_init(EVP_PKEY_CTX *ctx)
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{
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return 1;
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}
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/* -------- PKEY_METHOD for GOST MAC algorithm --------------------*/
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static int pkey_gost_mac_init(EVP_PKEY_CTX *ctx)
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{
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struct gost_mac_pmeth_data *data;
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data = OPENSSL_malloc(sizeof(struct gost_mac_pmeth_data));
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if (!data) return 0;
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memset(data,0,sizeof(struct gost_mac_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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static void pkey_gost_mac_cleanup (EVP_PKEY_CTX *ctx)
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{
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struct gost_mac_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx);
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OPENSSL_free(data);
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}
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static int pkey_gost_mac_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
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{
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struct gost_mac_pmeth_data *dst_data,*src_data;
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if (!pkey_gost_mac_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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return 1;
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}
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static int pkey_gost_mac_ctrl (EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
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{
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struct gost_mac_pmeth_data *data =
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(struct gost_mac_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_Gost28147_89_MAC)
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{
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GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL, GOST_R_INVALID_DIGEST_TYPE);
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return 0;
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}
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data->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_SET_MAC_KEY:
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if (p1 != 32)
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{
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GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL,
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GOST_R_INVALID_MAC_KEY_LENGTH);
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return 0;
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}
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memcpy(data->key,p2,32);
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data->key_set = 1;
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return 1;
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case EVP_PKEY_CTRL_DIGESTINIT:
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{
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EVP_MD_CTX *mctx = p2;
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void *key;
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if (!data->key_set)
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{
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EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(ctx);
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if (!pkey)
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{
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GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL,GOST_R_MAC_KEY_NOT_SET);
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return 0;
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}
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key = EVP_PKEY_get0(pkey);
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if (!key)
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{
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GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL,GOST_R_MAC_KEY_NOT_SET);
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return 0;
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}
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} else {
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key = &(data->key);
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}
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return mctx->digest->md_ctrl(mctx,EVP_MD_CTRL_SET_KEY,32,key);
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}
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}
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return -2;
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}
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static int pkey_gost_mac_ctrl_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, key_ctrl_string))
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{
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if (strlen(value)!=32)
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{
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GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL_STR,
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GOST_R_INVALID_MAC_KEY_LENGTH);
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return 0;
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}
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return pkey_gost_mac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY,
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32,(char *)value);
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}
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if (!strcmp(type, hexkey_ctrl_string))
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{
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long keylen; int ret;
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unsigned char *keybuf=string_to_hex(value,&keylen);
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if (keylen != 32)
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{
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GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL_STR,
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GOST_R_INVALID_MAC_KEY_LENGTH);
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return 0;
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}
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ret= pkey_gost_mac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY,
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32,keybuf);
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OPENSSL_free(keybuf);
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return ret;
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}
|
|
return -2;
|
|
}
|
|
|
|
static int pkey_gost_mac_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
|
|
{
|
|
struct gost_mac_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx);
|
|
unsigned char *keydata;
|
|
if (!data->key_set)
|
|
{
|
|
GOSTerr(GOST_F_PKEY_GOST_MAC_KEYGEN,GOST_R_MAC_KEY_NOT_SET);
|
|
return 0;
|
|
}
|
|
keydata = OPENSSL_malloc(32);
|
|
memcpy(keydata,data->key,32);
|
|
EVP_PKEY_assign(pkey, NID_id_Gost28147_89_MAC, keydata);
|
|
return 1;
|
|
}
|
|
|
|
static int pkey_gost_mac_signctx_init(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
static int pkey_gost_mac_signctx(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen, EVP_MD_CTX *mctx)
|
|
{
|
|
unsigned int tmpsiglen=*siglen; /* for platforms where sizeof(int)!=sizeof(size_t)*/
|
|
int ret;
|
|
if (!sig)
|
|
{
|
|
*siglen = 4;
|
|
return 1;
|
|
}
|
|
ret=EVP_DigestFinal_ex(mctx,sig,&tmpsiglen);
|
|
*siglen = tmpsiglen;
|
|
return ret;
|
|
}
|
|
/* ----------------------------------------------------------------*/
|
|
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:
|
|
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);
|
|
EVP_PKEY_meth_set_derive(*pmeth,
|
|
pkey_gost_derive_init, pkey_gost94_derive);
|
|
break;
|
|
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);
|
|
EVP_PKEY_meth_set_derive(*pmeth,
|
|
pkey_gost_derive_init, pkey_gost2001_derive);
|
|
break;
|
|
case NID_id_Gost28147_89_MAC:
|
|
EVP_PKEY_meth_set_ctrl(*pmeth,pkey_gost_mac_ctrl, pkey_gost_mac_ctrl_str);
|
|
EVP_PKEY_meth_set_signctx(*pmeth,pkey_gost_mac_signctx_init, pkey_gost_mac_signctx);
|
|
EVP_PKEY_meth_set_keygen(*pmeth,NULL, pkey_gost_mac_keygen);
|
|
EVP_PKEY_meth_set_init(*pmeth,pkey_gost_mac_init);
|
|
EVP_PKEY_meth_set_cleanup(*pmeth,pkey_gost_mac_cleanup);
|
|
EVP_PKEY_meth_set_copy(*pmeth,pkey_gost_mac_copy);
|
|
return 1;
|
|
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;
|
|
}
|
|
|