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613 lines
19 KiB
613 lines
19 KiB
/********************************************************************** |
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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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EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(ctx); |
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data = OPENSSL_malloc(sizeof(struct gost_pmeth_data)); |
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if (!data) |
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return 0; |
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memset(data, 0, sizeof(struct gost_pmeth_data)); |
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if (pkey && EVP_PKEY_get0(pkey)) { |
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switch (EVP_PKEY_base_id(pkey)) { |
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case NID_id_GostR3410_94: |
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data->sign_param_nid = gost94_nid_by_params(EVP_PKEY_get0(pkey)); |
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break; |
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case NID_id_GostR3410_2001: |
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data->sign_param_nid = |
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EC_GROUP_get_curve_name(EC_KEY_get0_group |
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(EVP_PKEY_get0((EVP_PKEY *)pkey))); |
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break; |
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default: |
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return 0; |
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} |
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} |
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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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|
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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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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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|
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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) |
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OPENSSL_free(data->shared_ukm); |
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OPENSSL_free(data); |
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} |
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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 = |
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(struct gost_pmeth_data *)EVP_PKEY_CTX_get_data(ctx); |
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switch (type) { |
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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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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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|
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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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case EVP_PKEY_CTRL_DIGESTINIT: |
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#ifndef OPENSSL_NO_CMS |
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case EVP_PKEY_CTRL_CMS_ENCRYPT: |
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case EVP_PKEY_CTRL_CMS_DECRYPT: |
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case EVP_PKEY_CTRL_CMS_SIGN: |
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#endif |
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return 1; |
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|
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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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case EVP_PKEY_CTRL_PEER_KEY: |
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if (p1 == 0 || p1 == 1) /* call from EVP_PKEY_derive_set_peer */ |
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return 1; |
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if (p1 == 2) /* TLS: peer key used? */ |
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return pctx->peer_key_used; |
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if (p1 == 3) /* TLS: peer key used! */ |
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return (pctx->peer_key_used = 1); |
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return -2; |
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} |
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return -2; |
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} |
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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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if (!value) { |
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return 0; |
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} |
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if (strlen(value) == 1) { |
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switch (toupper((unsigned char)value[0])) { |
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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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} else if ((strlen(value) == 2) |
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&& (toupper((unsigned char)value[0]) == 'X')) { |
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switch (toupper((unsigned char)value[1])) { |
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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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} else { |
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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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return 0; |
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} |
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for (; p->nid != NID_undef; p++) { |
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if (p->nid == param_nid) |
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break; |
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} |
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if (p->nid == NID_undef) { |
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GOSTerr(GOST_F_PKEY_GOST_CTRL94_STR, 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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|
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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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if (!value) { |
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return 0; |
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} |
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if (strlen(value) == 1) { |
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switch (toupper((unsigned char)value[0])) { |
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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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} else if ((strlen(value) == 2) |
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&& (toupper((unsigned char)value[0]) == 'X')) { |
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switch (toupper((unsigned char)value[1])) { |
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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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} else { |
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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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return 0; |
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} |
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for (; p->nid != NID_undef; p++) { |
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if (p->nid == param_nid) |
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break; |
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} |
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if (p->nid == NID_undef) { |
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GOSTerr(GOST_F_PKEY_GOST_CTRL01_STR, 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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|
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/* --------------------- key generation --------------------------------*/ |
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|
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static int pkey_gost_paramgen_init(EVP_PKEY_CTX *ctx) |
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{ |
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return 1; |
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} |
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|
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static int pkey_gost94_paramgen(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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GOSTerr(GOST_F_PKEY_GOST94_PARAMGEN, 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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DSA_free(dsa); |
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return 0; |
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} |
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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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|
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static int pkey_gost01_paramgen(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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GOSTerr(GOST_F_PKEY_GOST01_PARAMGEN, GOST_R_NO_PARAMETERS_SET); |
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return 0; |
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} |
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if (!ec) |
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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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EC_KEY_free(ec); |
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return 0; |
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} |
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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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|
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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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DSA *dsa; |
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if (!pkey_gost94_paramgen(ctx, pkey)) |
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return 0; |
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dsa = EVP_PKEY_get0(pkey); |
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gost_sign_keygen(dsa); |
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return 1; |
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} |
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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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EC_KEY *ec; |
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if (!pkey_gost01_paramgen(ctx, pkey)) |
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return 0; |
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ec = EVP_PKEY_get0(pkey); |
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gost2001_keygen(ec); |
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return 1; |
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} |
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|
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/* ----------- sign callbacks --------------------------------------*/ |
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|
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static int pkey_gost94_cp_sign(EVP_PKEY_CTX *ctx, unsigned char *sig, |
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size_t *siglen, const unsigned char *tbs, |
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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) |
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return 0; |
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if (!sig) { |
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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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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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|
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static int pkey_gost01_cp_sign(EVP_PKEY_CTX *ctx, unsigned char *sig, |
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size_t *siglen, const unsigned char *tbs, |
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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) |
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return 0; |
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if (!sig) { |
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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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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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|
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/* ------------------- verify callbacks ---------------------------*/ |
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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, |
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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) |
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return 0; |
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if (pub_key) |
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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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|
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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, |
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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) |
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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) |
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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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|
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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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|
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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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|
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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) |
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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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|
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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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|
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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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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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|
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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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|
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switch (type) { |
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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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GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL, |
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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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|
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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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GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL, GOST_R_INVALID_MAC_KEY_LENGTH); |
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return 0; |
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} |
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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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EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(ctx); |
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if (!pkey) { |
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GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL, |
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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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GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL, |
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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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|
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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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if (strlen(value) != 32) { |
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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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long keylen; |
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int ret; |
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unsigned char *keybuf = string_to_hex(value, &keylen); |
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if (!keybuf || keylen != 32) { |
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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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OPENSSL_free(keybuf); |
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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, 32, keybuf); |
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OPENSSL_free(keybuf); |
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return ret; |
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|
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} |
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return -2; |
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} |
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|
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static int pkey_gost_mac_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey) |
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{ |
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struct gost_mac_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx); |
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unsigned char *keydata; |
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if (!data->key_set) { |
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GOSTerr(GOST_F_PKEY_GOST_MAC_KEYGEN, GOST_R_MAC_KEY_NOT_SET); |
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return 0; |
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} |
|
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); |
|
EVP_PKEY_meth_set_paramgen(*pmeth, pkey_gost_paramgen_init, |
|
pkey_gost94_paramgen); |
|
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); |
|
EVP_PKEY_meth_set_paramgen(*pmeth, pkey_gost_paramgen_init, |
|
pkey_gost01_paramgen); |
|
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; |
|
}
|
|
|