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|
/* ocsp_ht.c */
/*
* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
* 2006.
*/
/* ====================================================================
* Copyright (c) 2006 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* licensing@OpenSSL.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* (eay@cryptsoft.com). This product includes software written by Tim
* Hudson (tjh@cryptsoft.com).
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include "e_os.h"
#include <openssl/asn1.h>
#include <openssl/ocsp.h>
#include <openssl/err.h>
#include <openssl/buffer.h>
/* Stateful OCSP request code, supporting non-blocking I/O */
/* Opaque OCSP request status structure */
struct ocsp_req_ctx_st {
int state; /* Current I/O state */
unsigned char *iobuf; /* Line buffer */
int iobuflen; /* Line buffer length */
BIO *io; /* BIO to perform I/O with */
BIO *mem; /* Memory BIO response is built into */
unsigned long asn1_len; /* ASN1 length of response */
unsigned long max_resp_len; /* Maximum length of response */
};
#define OCSP_MAX_RESP_LENGTH (100 * 1024)
#define OCSP_MAX_LINE_LEN 4096;
/* OCSP states */
/* If set no reading should be performed */
#define OHS_NOREAD 0x1000
/* Error condition */
#define OHS_ERROR (0 | OHS_NOREAD)
/* First line being read */
#define OHS_FIRSTLINE 1
/* MIME headers being read */
#define OHS_HEADERS 2
/* OCSP initial header (tag + length) being read */
#define OHS_ASN1_HEADER 3
/* OCSP content octets being read */
#define OHS_ASN1_CONTENT 4
/* First call: ready to start I/O */
#define OHS_ASN1_WRITE_INIT (5 | OHS_NOREAD)
/* Request being sent */
#define OHS_ASN1_WRITE (6 | OHS_NOREAD)
/* Request being flushed */
#define OHS_ASN1_FLUSH (7 | OHS_NOREAD)
/* Completed */
#define OHS_DONE (8 | OHS_NOREAD)
/* Headers set, no final \r\n included */
#define OHS_HTTP_HEADER (9 | OHS_NOREAD)
static int parse_http_line1(char *line);
OCSP_REQ_CTX *OCSP_REQ_CTX_new(BIO *io, int maxline)
{
OCSP_REQ_CTX *rctx;
rctx = OPENSSL_malloc(sizeof(OCSP_REQ_CTX));
if (!rctx)
return NULL;
rctx->state = OHS_ERROR;
rctx->max_resp_len = OCSP_MAX_RESP_LENGTH;
rctx->mem = BIO_new(BIO_s_mem());
rctx->io = io;
rctx->asn1_len = 0;
if (maxline > 0)
rctx->iobuflen = maxline;
else
rctx->iobuflen = OCSP_MAX_LINE_LEN;
rctx->iobuf = OPENSSL_malloc(rctx->iobuflen);
if (!rctx->iobuf || !rctx->mem) {
OCSP_REQ_CTX_free(rctx);
return NULL;
}
return rctx;
}
void OCSP_REQ_CTX_free(OCSP_REQ_CTX *rctx)
{
BIO_free(rctx->mem);
if (rctx->iobuf)
OPENSSL_free(rctx->iobuf);
OPENSSL_free(rctx);
}
BIO *OCSP_REQ_CTX_get0_mem_bio(OCSP_REQ_CTX *rctx)
{
return rctx->mem;
}
void OCSP_set_max_response_length(OCSP_REQ_CTX *rctx, unsigned long len)
{
if (len == 0)
rctx->max_resp_len = OCSP_MAX_RESP_LENGTH;
else
rctx->max_resp_len = len;
}
int OCSP_REQ_CTX_i2d(OCSP_REQ_CTX *rctx, const ASN1_ITEM *it, ASN1_VALUE *val)
{
static const char req_hdr[] =
"Content-Type: application/ocsp-request\r\n"
"Content-Length: %d\r\n\r\n";
int reqlen = ASN1_item_i2d(val, NULL, it);
if (BIO_printf(rctx->mem, req_hdr, reqlen) <= 0)
return 0;
if (ASN1_item_i2d_bio(it, rctx->mem, val) <= 0)
return 0;
rctx->state = OHS_ASN1_WRITE_INIT;
return 1;
}
int OCSP_REQ_CTX_nbio_d2i(OCSP_REQ_CTX *rctx,
ASN1_VALUE **pval, const ASN1_ITEM *it)
{
int rv, len;
const unsigned char *p;
rv = OCSP_REQ_CTX_nbio(rctx);
if (rv != 1)
return rv;
len = BIO_get_mem_data(rctx->mem, &p);
*pval = ASN1_item_d2i(NULL, &p, len, it);
if (*pval == NULL) {
rctx->state = OHS_ERROR;
return 0;
}
return 1;
}
int OCSP_REQ_CTX_http(OCSP_REQ_CTX *rctx, const char *op, const char *path)
{
static const char http_hdr[] = "%s %s HTTP/1.0\r\n";
if (!path)
path = "/";
if (BIO_printf(rctx->mem, http_hdr, op, path) <= 0)
return 0;
rctx->state = OHS_HTTP_HEADER;
return 1;
}
int OCSP_REQ_CTX_set1_req(OCSP_REQ_CTX *rctx, OCSP_REQUEST *req)
{
return OCSP_REQ_CTX_i2d(rctx, ASN1_ITEM_rptr(OCSP_REQUEST),
(ASN1_VALUE *)req);
}
int OCSP_REQ_CTX_add1_header(OCSP_REQ_CTX *rctx,
const char *name, const char *value)
{
if (!name)
return 0;
if (BIO_puts(rctx->mem, name) <= 0)
return 0;
if (value) {
if (BIO_write(rctx->mem, ": ", 2) != 2)
return 0;
if (BIO_puts(rctx->mem, value) <= 0)
return 0;
}
if (BIO_write(rctx->mem, "\r\n", 2) != 2)
return 0;
rctx->state = OHS_HTTP_HEADER;
return 1;
}
OCSP_REQ_CTX *OCSP_sendreq_new(BIO *io, const char *path, OCSP_REQUEST *req,
int maxline)
{
OCSP_REQ_CTX *rctx = NULL;
rctx = OCSP_REQ_CTX_new(io, maxline);
if (!rctx)
return NULL;
if (!OCSP_REQ_CTX_http(rctx, "POST", path))
goto err;
if (req && !OCSP_REQ_CTX_set1_req(rctx, req))
goto err;
return rctx;
err:
OCSP_REQ_CTX_free(rctx);
return NULL;
}
/*
* Parse the HTTP response. This will look like this: "HTTP/1.0 200 OK". We
* need to obtain the numeric code and (optional) informational message.
*/
static int parse_http_line1(char *line)
{
int retcode;
char *p, *q, *r;
/* Skip to first white space (passed protocol info) */
for (p = line; *p && !isspace((unsigned
|