WolfSSL
/
wolfssl-examples
mirror of https://github.com/wolfSSL/wolfssl-examples.git
1
0
Fork 0
Code Issues Releases Wiki Activity
wolfssl-examples/ocsp/ocsp_nonblock/ocsp_nonblock.c

237 lines
7.5 KiB
C
Raw Blame History

/* ocsp_nonblock.c
*
* Copyright (C) 2006-2022 wolfSSL Inc.
*
* This file is part of wolfSSL. (formerly known as CyaSSL)
*
* wolfSSL is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* wolfSSL is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
**/
#include <wolfssl/options.h>
#include <wolfssl/ssl.h>
#include <wolfssl/wolfio.h>
#include <wolfssl/error-ssl.h>
#include <wolfssl/wolfcrypt/error-crypt.h>
#include <wolfssl/wolfcrypt/logging.h>
static const char* kCACertsDir = "ca_certs"; /* put CA certs into this directory */
static const char* kGoogleCom = "google.pem"; /* www.google.com */
#ifndef HTTP_SCRATCH_BUFFER_SIZE
#define HTTP_SCRATCH_BUFFER_SIZE 512
#endif
#ifndef MAX_URL_ITEM_SIZE
#define MAX_URL_ITEM_SIZE 80
#endif
#ifndef DEFAULT_TIMEOUT_SEC
#define DEFAULT_TIMEOUT_SEC 0 /* no timeout */
#endif
static int io_timeout_sec = DEFAULT_TIMEOUT_SEC;
static SOCKET_T sfd = SOCKET_INVALID;
static word16 port;
static char path[MAX_URL_ITEM_SIZE];
static char domainName[MAX_URL_ITEM_SIZE];
static int nonBlockCnt = 0;
static byte* httpBuf;
/* Return size of the OCSP response or negative for error */
static int OcspLookupNonBlockCb(void* ctx, const char* url, int urlSz,
byte* ocspReqBuf, int ocspReqSz, byte** ocspRespBuf)
{
int ret = WOLFSSL_CBIO_ERR_GENERAL;
if (sfd != SOCKET_INVALID) {
ret = wolfIO_HttpProcessResponseOcsp(sfd, ocspRespBuf,
httpBuf, HTTP_SCRATCH_BUFFER_SIZE, NULL);
nonBlockCnt++;
if (ret == OCSP_WANT_READ)
return WOLFSSL_CBIO_ERR_WANT_READ;
printf("OCSP Response: ret %d, nonblock count %d\n",
ret, nonBlockCnt);
XFREE(httpBuf, NULL, DYNAMIC_TYPE_OCSP);
httpBuf = NULL;
return ret;
}
if (ocspReqBuf == NULL || ocspReqSz == 0) {
printf("OCSP request is required for lookup\n");
}
else if (ocspRespBuf == NULL) {
printf("Cannot save OCSP response\n");
}
else if (wolfIO_DecodeUrl(url, urlSz, domainName, path, &port) < 0) {
printf("Unable to decode OCSP URL\n");
}
else {
/* Note: This is free'd in OcspRespFreeCb callback */
int httpBufSz = HTTP_SCRATCH_BUFFER_SIZE;
httpBuf = (byte*)XMALLOC(httpBufSz, NULL, DYNAMIC_TYPE_OCSP);
printf("OCSP Lookup:\n");
printf("\tURL: %s\n", url);
printf("\tDomain: %s\n", domainName);
printf("\tPath: %s\n", path);
printf("\tPort: %d\n", port);
if (httpBuf == NULL) {
printf("Unable to create OCSP response buffer\n");
}
else {
httpBufSz = wolfIO_HttpBuildRequestOcsp(domainName, path, ocspReqSz,
httpBuf, httpBufSz);
ret = wolfIO_TcpConnect(&sfd, domainName, port, io_timeout_sec);
if (ret == 0) {
#if defined(WOLFSSL_NONBLOCK_OCSP) && defined(HAVE_IO_TIMEOUT)
wolfIO_SetBlockingMode(sfd, 1); /* non-blocking */
#endif
if (wolfIO_Send(sfd, (char*)httpBuf, httpBufSz, 0) !=
httpBufSz) {
printf("OCSP http request failed\n");
}
else if (wolfIO_Send(sfd, (char*)ocspReqBuf, ocspReqSz, 0) !=
ocspReqSz) {
printf("OCSP ocsp request failed\n");
}
else {
do {
ret = wolfIO_HttpProcessResponseOcsp(sfd, ocspRespBuf,
httpBuf, HTTP_SCRATCH_BUFFER_SIZE, NULL);
nonBlockCnt++;
if (ret == OCSP_WANT_READ)
return WOLFSSL_CBIO_ERR_WANT_READ;
} while (ret == OCSP_WANT_READ);
printf("OCSP Response: ret %d, nonblock count %d\n",
ret, nonBlockCnt);
}
}
else {
printf("OCSP Responder connection failed\n");
}
if (sfd != SOCKET_INVALID)
CloseSocket(sfd);
XFREE(httpBuf, NULL, DYNAMIC_TYPE_OCSP);
httpBuf = NULL;
}
}
(void)ctx;
printf("Resp ret: %d\n", ret);
return ret;
}
static void OcspRespFreeCb(void* ctx, byte *resp)
{
if (resp)
XFREE(resp, NULL, DYNAMIC_TYPE_OCSP);
httpBuf = NULL;
(void)ctx;
}
int main(int argc, char** argv)
{
int ret;
WOLFSSL_CERT_MANAGER* pCm;
char pem[2048];
int pemSz = 0;
byte der[2000];
int derSz = 0;
FILE* file;
const char* certFile = kGoogleCom;
#if 0
wolfSSL_Debugging_ON();
#endif
if (argc > 1) {
certFile = argv[1];
}
/* Create certificate manager context */
pCm = wolfSSL_CertManagerNew();
if (pCm) {
#ifdef HAVE_OCSP
/* Enable OCSP */
ret = wolfSSL_CertManagerEnableOCSP(pCm, 0);
if (ret == WOLFSSL_SUCCESS) {
/* Setup callbacks for OCSP */
ret = wolfSSL_CertManagerSetOCSP_Cb(pCm,
OcspLookupNonBlockCb,
OcspRespFreeCb,
NULL /* optional context */
);
}
#else
ret = WOLFSSL_SUCCESS;
#endif
if (ret == WOLFSSL_SUCCESS) {
/* Load root CAs into Certificate Manager */
ret = wolfSSL_CertManagerLoadCA(pCm, NULL, kCACertsDir);
printf("Loaded Trusted CA dir %s (ret %d)\n", kCACertsDir, ret);
}
if (ret == WOLFSSL_SUCCESS) {
/* Load PEM to buffer */
file = fopen(certFile, "rb");
if (file != NULL) {
pemSz = fread(pem, 1, sizeof(pem), file);
fclose(file);
}
/* Convert certificate to DER/ASN.1 */
ret = wc_CertPemToDer(
(byte*)pem, pemSz,
der, sizeof(der), CERT_TYPE);
if (ret >= 0) {
derSz = ret;
ret = WOLFSSL_SUCCESS;
}
printf("Convert Google.com PEM cert to DER (ret %d)\n", ret);
}
if (ret == WOLFSSL_SUCCESS) {
/* Load and verify certificate */
ret = wolfSSL_CertManagerVerifyBuffer(pCm,
der, derSz, WOLFSSL_FILETYPE_ASN1);
printf("Verify Google.com cert: %d\n", ret);
}
#ifdef HAVE_OCSP
if (ret == WOLFSSL_SUCCESS) {
/* Check OCSP for certificate */
do {
ret = wolfSSL_CertManagerCheckOCSP(pCm,
der, derSz);
} while (ret == OCSP_WANT_READ);
printf("Check OCSP for Google.com (ret %d)\n", ret);
}
#endif
wolfSSL_CertManagerFree(pCm);
}
else {
ret = MEMORY_E;
}
printf("Ret = %d: %s\n",
ret, (ret == WOLFSSL_SUCCESS) ?
"success" :
wc_GetErrorString(ret));
return ret;
}
Reference in New Issue View Git Blame Copy Permalink