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238 lines
7.1 KiB
C
238 lines
7.1 KiB
C
/* ====================================================================
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* Copyright (c) 2016 The GmSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the GmSSL Project.
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* (http://gmssl.org/)"
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*
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* 4. The name "GmSSL Project" must not be used to endorse or promote
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* products derived from this software without prior written
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* permission. For written permission, please contact
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* guanzhi1980@gmail.com.
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*
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* 5. Products derived from this software may not be called "GmSSL"
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* nor may "GmSSL" appear in their names without prior written
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* permission of the GmSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the GmSSL Project
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* (http://gmssl.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE GmSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE GmSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES
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* LOSS OF USE, DATA, OR PROFITS OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <openssl/err.h>
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#include <openssl/evp.h>
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#include <openssl/rand.h>
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#include <openssl/gmsdf.h>
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#include <openssl/engine.h>
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#include "sdf_lcl.h"
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/*
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* Unlike the `SDF_OpenDevice`, we always assume that the `SDF_OpenSession` can
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* be called multiple times, and the implementation will always return a new
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* session handle on success. But noramlly the hardware and the software can
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* only support limited sessions, so this function can also failed.
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*
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* For portability, the application should assume that only one cryptographic
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* operation can be processed over one session. For example, do not mix
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* symmetric encryption and hash functions over the same session. The
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* implementation might support multiple operations, check the vendor's manual.
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*/
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/*
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* there are two purpose for session:
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* (1) hold session information
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* (2) a reference to ENGINE
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*/
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/*
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typedef struct {
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uint32_t magic;
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char *app;
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ENGINE *engine;
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char *passwords[SDF_MAX_KEY_INDEX];
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EVP_MD_CTX *md_ctx;
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} SDF_SESSION;
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*/
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int SDF_OpenSession(
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void *hDeviceHandle,
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void **phSessionHandle)
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{
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int ret = SDR_UNKNOWERR;
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SDF_SESSION *session = NULL;
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if (!hDeviceHandle || !phSessionHandle) {
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SDFerr(SDF_F_SDF_OPENSESSION, ERR_R_PASSED_NULL_PARAMETER);
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return SDR_INARGERR;
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}
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if (hDeviceHandle != deviceHandle) {
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SDFerr(SDF_F_SDF_OPENSESSION, SDF_R_INVALID_DEVICE_HANDLE);
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return SDR_INARGERR;
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}
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if (!(session = OPENSSL_zalloc(sizeof(*session)))) {
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SDFerr(SDF_F_SDF_OPENSESSION, ERR_R_MALLOC_FAILURE);
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ret = SDR_NOBUFFER;
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goto end;
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}
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session->magic = SDF_SESSION_MAGIC;
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#ifndef OPENSSL_NO_ENGINE
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if (!(session->engine = ENGINE_by_id(SDF_ENGINE_ID))) {
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SDFerr(SDF_F_SDF_OPENSESSION, SDF_R_LOAD_ENGINE_FAILURE);
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ret = SDR_HARDFAIL;
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goto end;
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}
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#endif
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*phSessionHandle = session;
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session = NULL;
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ret = SDR_OK;
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end:
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OPENSSL_free(session);
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return ret;
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}
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int SDF_CloseSession(
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void *hSessionHandle)
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{
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SDF_SESSION *session = (SDF_SESSION *)hSessionHandle;
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int i;
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if (!hSessionHandle) {
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return SDR_OK;
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}
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if (session->magic != SDF_SESSION_MAGIC) {
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SDFerr(SDF_F_SDF_CLOSESESSION, SDF_R_INVALID_SESSION);
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return SDR_INARGERR;
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}
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#ifndef OPENSSL_NO_ENGINE
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if (session->engine) {
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ENGINE_finish(session->engine);
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ENGINE_free(session->engine);
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session->engine = NULL;
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}
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#endif
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for (i = 0; i <= SDF_MAX_KEY_INDEX; i++) {
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OPENSSL_clear_free(session->password[i],
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strlen(session->password[i]));
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session->password[i] = NULL;
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}
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OPENSSL_free(session);
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return SDR_OK;
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}
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/* we try that the password is correct by `ENGINE_load_private_key`, then we
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* destory the returned `EVP_PKEY` and keep the verified password in the
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* session. We can use `UI_set_result` to pass the password to the ENGINE
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*/
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int SDF_GetPrivateKeyAccessRight(
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void *hSessionHandle,
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unsigned int uiKeyIndex,
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unsigned char *pucPassword,
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unsigned int uiPwdLength)
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{
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SDF_SESSION *session = (SDF_SESSION *)hSessionHandle;
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EVP_PKEY *pkey = NULL;
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char *key_id = NULL;
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UI_METHOD *ui_meth = NULL;
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void *cb_data = NULL;
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if (!hSessionHandle || !pucPassword) {
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SDFerr(SDF_F_SDF_GETPRIVATEKEYACCESSRIGHT,
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ERR_R_PASSED_NULL_PARAMETER);
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return SDR_INARGERR;
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}
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if (session->magic != SDF_SESSION_MAGIC) {
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SDFerr(SDF_F_SDF_GETPRIVATEKEYACCESSRIGHT,
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SDF_R_INVALID_SESSION_HANDLE);
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return SDR_INARGERR;
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}
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if (uiKeyIndex <= 0 || uiKeyIndex > SDF_MAX_KEY_INDEX) {
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SDFerr(SDF_F_SDF_GETPRIVATEKEYACCESSRIGHT,
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SDF_R_INVALID_KEY_INDEX);
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return -1;
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}
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if (uiPwdLength <= 0 || uiPwdLength > INT_MAX) {
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SDFerr(SDF_F_SDF_GETPRIVATEKEYACCESSRIGHT,
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SDF_R_INVALID_PASSWORD_LENGTH);
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return SDR_INARGERR;
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}
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if (!(pkey = ENGINE_load_private_key(session->engine, key_id,
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ui_meth, cb_data))) {
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SDFerr(SDF_F_SDF_GETPRIVATEKEYACCESSRIGHT, ERR_R_ENGINE_LIB);
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return 0;
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}
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return SDR_OK;
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}
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int SDF_ReleasePrivateKeyAccessRight(
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void *hSessionHandle,
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unsigned int uiKeyIndex)
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{
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SDF_SESSION *session = (SDF_SESSION *)hSessionHandle;
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if (!hSessionHandle) {
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SDFerr(SDF_F_SDF_RELEASEPRIVATEKEYACCESSRIGHT,
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ERR_R_PASSED_NULL_PARAMETER);
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return SDR_INARGERR;
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}
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if (session->magic != SDF_SESSION_MAGIC) {
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SDFerr(SDF_F_SDF_RELEASEPRIVATEKEYACCESSRIGHT,
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SDF_R_INVALID_SESSION_HANDLE);
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return SDR_INARGERR;
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}
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if (uiKeyIndex <= 0 || uiKeyIndex > SDF_MAX_KEY_INDEX) {
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SDFerr(SDF_F_SDF_RELEASEPRIVATEKEYACCESSRIGHT,
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SDF_R_INVALID_KEY_INDEX);
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return -1;
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}
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if (session->password[uiKeyIndex]) {
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OPENSSL_clear_free(session->password[uiKeyIndex],
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strlen(session->password[uiKeyIndex]));
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session->password[uiKeyIndex] = NULL;
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}
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return SDR_OK;
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}
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