Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcrypto/crypto/../../libssl/src/crypto/ocsp/ocsp_ht.c	Lines:	0	184	0.0 %
Date:	2016-12-06	Branches:	0	138	0.0 %


/* $OpenBSD: ocsp_ht.c,v 1.22 2014/10/03 06:02:38 doug Exp $ */
/* 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 <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 */
};

#define OCSP_MAX_REQUEST_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
/* 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)


static int parse_http_line1(char *line);

void
OCSP_REQ_CTX_free(OCSP_REQ_CTX *rctx)
{
	if (rctx == NULL)
		return;

	BIO_free(rctx->mem);
	free(rctx->iobuf);
	free(rctx);
}

int
OCSP_REQ_CTX_set1_req(OCSP_REQ_CTX *rctx, OCSP_REQUEST *req)
{
	if (BIO_printf(rctx->mem, "Content-Type: application/ocsp-request\r\n"
	    "Content-Length: %d\r\n\r\n", i2d_OCSP_REQUEST(req, NULL)) <= 0)
		return 0;
	if (i2d_OCSP_REQUEST_bio(rctx->mem, req) <= 0)
		return 0;
	rctx->state = OHS_ASN1_WRITE;
	rctx->asn1_len = BIO_get_mem_data(rctx->mem, NULL);
	return 1;
}

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;
	return 1;
}

OCSP_REQ_CTX *
OCSP_sendreq_new(BIO *io, char *path, OCSP_REQUEST *req, int maxline)
{
	OCSP_REQ_CTX *rctx;

	rctx = malloc(sizeof(OCSP_REQ_CTX));
	if (rctx == NULL)
		return NULL;
	rctx->state = OHS_ERROR;
	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 = malloc(rctx->iobuflen);
	if (!rctx->iobuf) {
		BIO_free(rctx->mem);
		free(rctx);
		return NULL;
	}
	if (!path)
		path = "/";

	if (BIO_printf(rctx->mem, "POST %s HTTP/1.0\r\n", path) <= 0) {
		free(rctx->iobuf);
		BIO_free(rctx->mem);
		free(rctx);
		return NULL;
	}

	if (req && !OCSP_REQ_CTX_set1_req(rctx, req)) {
		free(rctx->iobuf);
		BIO_free(rctx->mem);
		free(rctx);
		return NULL;
	}

	return rctx;
}

/* 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 char)*p); p++)
		continue;
	if (!*p) {
		OCSPerr(OCSP_F_PARSE_HTTP_LINE1,
		    OCSP_R_SERVER_RESPONSE_PARSE_ERROR);
		return 0;
	}

	/* Skip past white space to start of response code */
	while (*p && isspace((unsigned char)*p))
		p++;
	if (!*p) {
		OCSPerr(OCSP_F_PARSE_HTTP_LINE1,
		    OCSP_R_SERVER_RESPONSE_PARSE_ERROR);
		return 0;
	}

	/* Find end of response code: first whitespace after start of code */
	for (q = p; *q && !isspace((unsigned char)*q); q++)
		continue;
	if (!*q) {
		OCSPerr(OCSP_F_PARSE_HTTP_LINE1,
		    OCSP_R_SERVER_RESPONSE_PARSE_ERROR);
		return 0;
	}

	/* Set end of response code and start of message */
	*q++ = 0;

	/* Attempt to parse numeric code */
	retcode = strtoul(p, &r, 10);

	if (*r)
		return 0;

	/* Skip over any leading white space in message */
	while (*q && isspace((unsigned char)*q))
		q++;
	if (*q) {
		/* Finally zap any trailing white space in message (include
		 * CRLF) */

		/* We know q has a non white space character so this is OK */
		for (r = q + strlen(q) - 1; isspace((unsigned char)*r); r--)
			*r = 0;
	}
	if (retcode != 200) {
		OCSPerr(OCSP_F_PARSE_HTTP_LINE1, OCSP_R_SERVER_RESPONSE_ERROR);
		if (!*q)
			ERR_asprintf_error_data("Code=%s", p);
		else
			ERR_asprintf_error_data("Code=%s,Reason=%s", p, q);
		return 0;
	}

	return 1;
}

int
OCSP_sendreq_nbio(OCSP_RESPONSE **presp, OCSP_REQ_CTX *rctx)
{
	int i, n;
	const unsigned char *p;

next_io:
	if (!(rctx->state & OHS_NOREAD)) {
		n = BIO_read(rctx->io, rctx->iobuf, rctx->iobuflen);

		if (n <= 0) {
			if (BIO_should_retry(rctx->io))
				return -1;
			return 0;
		}

		/* Write data to memory BIO */
		if (BIO_write(rctx->mem, rctx->iobuf, n) != n)
			return 0;
	}

	switch (rctx->state) {
	case OHS_ASN1_WRITE:
		n = BIO_get_mem_data(rctx->mem, &p);
		i = BIO_write(rctx->io,
		    p + (n - rctx->asn1_len), rctx->asn1_len);
		if (i <= 0) {
			if (BIO_should_retry(rctx->io))
				return -1;
			rctx->state = OHS_ERROR;
			return 0;
		}

		rctx->asn1_len -= i;
		if (rctx->asn1_len > 0)
			goto next_io;

		rctx->state = OHS_ASN1_FLUSH;

		(void)BIO_reset(rctx->mem);
		/* FALLTHROUGH */

	case OHS_ASN1_FLUSH:
		i = BIO_flush(rctx->io);
		if (i > 0) {
			rctx->state = OHS_FIRSTLINE;
			goto next_io;
		}

		if (BIO_should_retry(rctx->io))
			return -1;

		rctx->state = OHS_ERROR;
		return 0;

	case OHS_ERROR:
		return 0;

	case OHS_FIRSTLINE:
	case OHS_HEADERS:
		/* Attempt to read a line in */
next_line:
		/* Due to &%^*$" memory BIO behaviour with BIO_gets we
		 * have to check there's a complete line in there before
		 * calling BIO_gets or we'll just get a partial read.
		 */
		n = BIO_get_mem_data(rctx->mem, &p);
		if ((n <= 0) || !memchr(p, '\n', n)) {
			if (n >= rctx->iobuflen) {
				rctx->state = OHS_ERROR;
				return 0;
			}
			goto next_io;
		}
		n = BIO_gets(rctx->mem, (char *)rctx->iobuf, rctx->iobuflen);
		if (n <= 0) {
			if (BIO_should_retry(rctx->mem))
				goto next_io;
			rctx->state = OHS_ERROR;
			return 0;
		}

		/* Don't allow excessive lines */
		if (n == rctx->iobuflen) {
			rctx->state = OHS_ERROR;
			return 0;
		}

		/* First line */
		if (rctx->state == OHS_FIRSTLINE) {
			if (parse_http_line1((char *)rctx->iobuf)) {
				rctx->state = OHS_HEADERS;
				goto next_line;
			} else {
				rctx->state = OHS_ERROR;
				return 0;
			}
		} else {
			/* Look for blank line: end of headers */
			for (p = rctx->iobuf; *p; p++) {
				if ((*p != '\r') && (*p != '\n'))
					break;
			}
			if (*p)
				goto next_line;

			rctx->state = OHS_ASN1_HEADER;
		}
		/* FALLTRHOUGH */

	case OHS_ASN1_HEADER:
		/* Now reading ASN1 header: can read at least 2 bytes which
		 * is enough for ASN1 SEQUENCE header and either length field
		 * or at least the length of the length field.
		 */
		n = BIO_get_mem_data(rctx->mem, &p);
		if (n < 2)
			goto next_io;

		/* Check it is an ASN1 SEQUENCE */
		if (*p++ != (V_ASN1_SEQUENCE|V_ASN1_CONSTRUCTED)) {
			rctx->state = OHS_ERROR;
			return 0;
		}

		/* Check out length field */
		if (*p & 0x80) {
			/* If MSB set on initial length octet we can now
			 * always read 6 octets: make sure we have them.
			 */
			if (n < 6)
				goto next_io;
			n = *p & 0x7F;
			/* Not NDEF or excessive length */
			if (!n || (n > 4)) {
				rctx->state = OHS_ERROR;
				return 0;
			}
			p++;
			rctx->asn1_len = 0;
			for (i = 0; i < n; i++) {
				rctx->asn1_len <<= 8;
				rctx->asn1_len |= *p++;
			}

			if (rctx->asn1_len > OCSP_MAX_REQUEST_LENGTH) {
				rctx->state = OHS_ERROR;
				return 0;
			}

			rctx->asn1_len += n + 2;
		} else
			rctx->asn1_len = *p + 2;

		rctx->state = OHS_ASN1_CONTENT;

		/* FALLTHROUGH */

	case OHS_ASN1_CONTENT:
		n = BIO_get_mem_data(rctx->mem, &p);
		if (n < (int)rctx->asn1_len)
			goto next_io;

		*presp = d2i_OCSP_RESPONSE(NULL, &p, rctx->asn1_len);
		if (*presp) {
			rctx->state = OHS_DONE;
			return 1;
		}

		rctx->state = OHS_ERROR;
		return 0;

	case OHS_DONE:
		return 1;
	}

	return 0;
}

/* Blocking OCSP request handler: now a special case of non-blocking I/O */
OCSP_RESPONSE *
OCSP_sendreq_bio(BIO *b, char *path, OCSP_REQUEST *req)
{
	OCSP_RESPONSE *resp = NULL;
	OCSP_REQ_CTX *ctx;
	int rv;

	ctx = OCSP_sendreq_new(b, path, req, -1);
	if (ctx == NULL)
		return NULL;

	do {
		rv = OCSP_sendreq_nbio(&resp, ctx);
	} while ((rv == -1) && BIO_should_retry(b));

	OCSP_REQ_CTX_free(ctx);

	if (rv)
		return resp;

	return NULL;
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: ocsp_ht.c,v 1.22 2014/10/03 06:02:38 doug Exp $ */
2			/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3			* project 2006.
4			*/
5			/* ====================================================================
6			* Copyright (c) 2006 The OpenSSL Project. All rights reserved.
7			*
8			* Redistribution and use in source and binary forms, with or without
9			* modification, are permitted provided that the following conditions
10			* are met:
11			*
12			* 1. Redistributions of source code must retain the above copyright
13			* notice, this list of conditions and the following disclaimer.
14			*
15			* 2. Redistributions in binary form must reproduce the above copyright
16			* notice, this list of conditions and the following disclaimer in
17			* the documentation and/or other materials provided with the
18			* distribution.
19			*
20			* 3. All advertising materials mentioning features or use of this
21			* software must display the following acknowledgment:
22			* "This product includes software developed by the OpenSSL Project
23			* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24			*
25			* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26			* endorse or promote products derived from this software without
27			* prior written permission. For written permission, please contact
28			* licensing@OpenSSL.org.
29			*
30			* 5. Products derived from this software may not be called "OpenSSL"
31			* nor may "OpenSSL" appear in their names without prior written
32			* permission of the OpenSSL Project.
33			*
34			* 6. Redistributions of any form whatsoever must retain the following
35			* acknowledgment:
36			* "This product includes software developed by the OpenSSL Project
37			* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38			*
39			* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40			* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42			* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43			* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44			* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45			* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46			* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48			* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49			* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50			* OF THE POSSIBILITY OF SUCH DAMAGE.
51			* ====================================================================
52			*
53			* This product includes cryptographic software written by Eric Young
54			* (eay@cryptsoft.com). This product includes software written by Tim
55			* Hudson (tjh@cryptsoft.com).
56			*
57			*/
58
59			#include <stdio.h>
60			#include <stdlib.h>
61			#include <ctype.h>
62			#include <string.h>
63			#include <openssl/asn1.h>
64			#include <openssl/ocsp.h>
65			#include <openssl/err.h>
66			#include <openssl/buffer.h>
67
68			/* Stateful OCSP request code, supporting non-blocking I/O */
69
70			/* Opaque OCSP request status structure */
71
72			struct ocsp_req_ctx_st {
73			int state; /* Current I/O state */
74			unsigned char iobuf; / Line buffer */
75			int iobuflen; /* Line buffer length */
76			BIO io; / BIO to perform I/O with */
77			BIO mem; / Memory BIO response is built into */
78			unsigned long asn1_len; /* ASN1 length of response */
79			};
80
81			#define OCSP_MAX_REQUEST_LENGTH (100 * 1024)
82			#define OCSP_MAX_LINE_LEN 4096;
83
84			/* OCSP states */
85
86			/* If set no reading should be performed */
87			#define OHS_NOREAD 0x1000
88			/* Error condition */
89			#define OHS_ERROR (0 \| OHS_NOREAD)
90			/* First line being read */
91			#define OHS_FIRSTLINE 1
92			/* MIME headers being read */
93			#define OHS_HEADERS 2
94			/* OCSP initial header (tag + length) being read */
95			#define OHS_ASN1_HEADER 3
96			/* OCSP content octets being read */
97			#define OHS_ASN1_CONTENT 4
98			/* Request being sent */
99			#define OHS_ASN1_WRITE (6 \| OHS_NOREAD)
100			/* Request being flushed */
101			#define OHS_ASN1_FLUSH (7 \| OHS_NOREAD)
102			/* Completed */
103			#define OHS_DONE (8 \| OHS_NOREAD)
104
105
106			static int parse_http_line1(char *line);
107
108			void
109			OCSP_REQ_CTX_free(OCSP_REQ_CTX *rctx)
110			{
111			if (rctx == NULL)
112			return;
113
114			BIO_free(rctx->mem);
115			free(rctx->iobuf);
116			free(rctx);
117			}
118
119			int
120			OCSP_REQ_CTX_set1_req(OCSP_REQ_CTX rctx, OCSP_REQUEST req)
121			{
122			if (BIO_printf(rctx->mem, "Content-Type: application/ocsp-request\r\n"
123			"Content-Length: %d\r\n\r\n", i2d_OCSP_REQUEST(req, NULL)) <= 0)
124			return 0;
125			if (i2d_OCSP_REQUEST_bio(rctx->mem, req) <= 0)
126			return 0;
127			rctx->state = OHS_ASN1_WRITE;
128			rctx->asn1_len = BIO_get_mem_data(rctx->mem, NULL);
129			return 1;
130			}
131
132			int
133			OCSP_REQ_CTX_add1_header(OCSP_REQ_CTX rctx, const char name,
134			const char *value)
135			{
136			if (!name)
137			return 0;
138			if (BIO_puts(rctx->mem, name) <= 0)
139			return 0;
140			if (value) {
141			if (BIO_write(rctx->mem, ": ", 2) != 2)
142			return 0;
143			if (BIO_puts(rctx->mem, value) <= 0)
144			return 0;
145			}
146			if (BIO_write(rctx->mem, "\r\n", 2) != 2)
147			return 0;
148			return 1;
149			}
150
151			OCSP_REQ_CTX *
152			OCSP_sendreq_new(BIO io, char path, OCSP_REQUEST *req, int maxline)
153			{
154			OCSP_REQ_CTX *rctx;
155
156			rctx = malloc(sizeof(OCSP_REQ_CTX));
157			if (rctx == NULL)
158			return NULL;
159			rctx->state = OHS_ERROR;
160			rctx->mem = BIO_new(BIO_s_mem());
161			rctx->io = io;
162			rctx->asn1_len = 0;
163			if (maxline > 0)
164			rctx->iobuflen = maxline;
165			else
166			rctx->iobuflen = OCSP_MAX_LINE_LEN;
167			rctx->iobuf = malloc(rctx->iobuflen);
168			if (!rctx->iobuf) {
169			BIO_free(rctx->mem);
170			free(rctx);
171			return NULL;
172			}
173			if (!path)
174			path = "/";
175
176			if (BIO_printf(rctx->mem, "POST %s HTTP/1.0\r\n", path) <= 0) {
177			free(rctx->iobuf);
178			BIO_free(rctx->mem);
179			free(rctx);
180			return NULL;
181			}
182
183			if (req && !OCSP_REQ_CTX_set1_req(rctx, req)) {
184			free(rctx->iobuf);
185			BIO_free(rctx->mem);
186			free(rctx);
187			return NULL;
188			}
189
190			return rctx;
191			}
192
193			/* Parse the HTTP response. This will look like this:
194			* "HTTP/1.0 200 OK". We need to obtain the numeric code and
195			* (optional) informational message.
196			*/
197			static int
198			parse_http_line1(char *line)
199			{
200			int retcode;
201			char p, q, *r;
202
203			/* Skip to first white space (passed protocol info) */
204			for (p = line; p && !isspace((unsigned char)p); p++)
205			continue;
206			if (!*p) {
207			OCSPerr(OCSP_F_PARSE_HTTP_LINE1,
208			OCSP_R_SERVER_RESPONSE_PARSE_ERROR);
209			return 0;
210			}
211
212			/* Skip past white space to start of response code */
213			while (p && isspace((unsigned char)p))
214			p++;
215			if (!*p) {
216			OCSPerr(OCSP_F_PARSE_HTTP_LINE1,
217			OCSP_R_SERVER_RESPONSE_PARSE_ERROR);
218			return 0;
219			}
220
221			/* Find end of response code: first whitespace after start of code */
222			for (q = p; q && !isspace((unsigned char)q); q++)
223			continue;
224			if (!*q) {
225			OCSPerr(OCSP_F_PARSE_HTTP_LINE1,
226			OCSP_R_SERVER_RESPONSE_PARSE_ERROR);
227			return 0;
228			}
229
230			/* Set end of response code and start of message */
231			*q++ = 0;
232
233			/* Attempt to parse numeric code */
234			retcode = strtoul(p, &r, 10);
235
236			if (*r)
237			return 0;
238
239			/* Skip over any leading white space in message */
240			while (q && isspace((unsigned char)q))
241			q++;
242			if (*q) {
243			/* Finally zap any trailing white space in message (include
244			* CRLF) */
245
246			/* We know q has a non white space character so this is OK */
247			for (r = q + strlen(q) - 1; isspace((unsigned char)*r); r--)
248			*r = 0;
249			}
250			if (retcode != 200) {
251			OCSPerr(OCSP_F_PARSE_HTTP_LINE1, OCSP_R_SERVER_RESPONSE_ERROR);
252			if (!*q)
253			ERR_asprintf_error_data("Code=%s", p);
254			else
255			ERR_asprintf_error_data("Code=%s,Reason=%s", p, q);
256			return 0;
257			}
258
259			return 1;
260			}
261
262			int
263			OCSP_sendreq_nbio(OCSP_RESPONSE *presp, OCSP_REQ_CTX rctx)
264			{
265			int i, n;
266			const unsigned char *p;
267
268			next_io:
269			if (!(rctx->state & OHS_NOREAD)) {
270			n = BIO_read(rctx->io, rctx->iobuf, rctx->iobuflen);
271
272			if (n <= 0) {
273			if (BIO_should_retry(rctx->io))
274			return -1;
275			return 0;
276			}
277
278			/* Write data to memory BIO */
279			if (BIO_write(rctx->mem, rctx->iobuf, n) != n)
280			return 0;
281			}
282
283			switch (rctx->state) {
284			case OHS_ASN1_WRITE:
285			n = BIO_get_mem_data(rctx->mem, &p);
286			i = BIO_write(rctx->io,
287			p + (n - rctx->asn1_len), rctx->asn1_len);
288			if (i <= 0) {
289			if (BIO_should_retry(rctx->io))
290			return -1;
291			rctx->state = OHS_ERROR;
292			return 0;
293			}
294
295			rctx->asn1_len -= i;
296			if (rctx->asn1_len > 0)
297			goto next_io;
298
299			rctx->state = OHS_ASN1_FLUSH;
300
301			(void)BIO_reset(rctx->mem);
302			/* FALLTHROUGH */
303
304			case OHS_ASN1_FLUSH:
305			i = BIO_flush(rctx->io);
306			if (i > 0) {
307			rctx->state = OHS_FIRSTLINE;
308			goto next_io;
309			}
310
311			if (BIO_should_retry(rctx->io))
312			return -1;
313
314			rctx->state = OHS_ERROR;
315			return 0;
316
317			case OHS_ERROR:
318			return 0;
319
320			case OHS_FIRSTLINE:
321			case OHS_HEADERS:
322			/* Attempt to read a line in */
323			next_line:
324			/* Due to &%^*$" memory BIO behaviour with BIO_gets we
325			* have to check there's a complete line in there before
326			* calling BIO_gets or we'll just get a partial read.
327			*/
328			n = BIO_get_mem_data(rctx->mem, &p);
329			if ((n <= 0) \|\| !memchr(p, '\n', n)) {
330			if (n >= rctx->iobuflen) {
331			rctx->state = OHS_ERROR;
332			return 0;
333			}
334			goto next_io;
335			}
336			n = BIO_gets(rctx->mem, (char *)rctx->iobuf, rctx->iobuflen);
337			if (n <= 0) {
338			if (BIO_should_retry(rctx->mem))
339			goto next_io;
340			rctx->state = OHS_ERROR;
341			return 0;
342			}
343
344			/* Don't allow excessive lines */
345			if (n == rctx->iobuflen) {
346			rctx->state = OHS_ERROR;
347			return 0;
348			}
349
350			/* First line */
351			if (rctx->state == OHS_FIRSTLINE) {
352			if (parse_http_line1((char *)rctx->iobuf)) {
353			rctx->state = OHS_HEADERS;
354			goto next_line;
355			} else {
356			rctx->state = OHS_ERROR;
357			return 0;
358			}
359			} else {
360			/* Look for blank line: end of headers */
361			for (p = rctx->iobuf; *p; p++) {
362			if ((p != '\r') && (p != '\n'))
363			break;
364			}
365			if (*p)
366			goto next_line;
367
368			rctx->state = OHS_ASN1_HEADER;
369			}
370			/* FALLTRHOUGH */
371
372			case OHS_ASN1_HEADER:
373			/* Now reading ASN1 header: can read at least 2 bytes which
374			* is enough for ASN1 SEQUENCE header and either length field
375			* or at least the length of the length field.
376			*/
377			n = BIO_get_mem_data(rctx->mem, &p);
378			if (n < 2)
379			goto next_io;
380
381			/* Check it is an ASN1 SEQUENCE */
382			if (*p++ != (V_ASN1_SEQUENCE\|V_ASN1_CONSTRUCTED)) {
383			rctx->state = OHS_ERROR;
384			return 0;
385			}
386
387			/* Check out length field */
388			if (*p & 0x80) {
389			/* If MSB set on initial length octet we can now
390			* always read 6 octets: make sure we have them.
391			*/
392			if (n < 6)
393			goto next_io;
394			n = *p & 0x7F;
395			/* Not NDEF or excessive length */
396			if (!n \|\| (n > 4)) {
397			rctx->state = OHS_ERROR;
398			return 0;
399			}
400			p++;
401			rctx->asn1_len = 0;
402			for (i = 0; i < n; i++) {
403			rctx->asn1_len <<= 8;
404			rctx->asn1_len \|= *p++;
405			}
406
407			if (rctx->asn1_len > OCSP_MAX_REQUEST_LENGTH) {
408			rctx->state = OHS_ERROR;
409			return 0;
410			}
411
412			rctx->asn1_len += n + 2;
413			} else
414			rctx->asn1_len = *p + 2;
415
416			rctx->state = OHS_ASN1_CONTENT;
417
418			/* FALLTHROUGH */
419
420			case OHS_ASN1_CONTENT:
421			n = BIO_get_mem_data(rctx->mem, &p);
422			if (n < (int)rctx->asn1_len)
423			goto next_io;
424
425			*presp = d2i_OCSP_RESPONSE(NULL, &p, rctx->asn1_len);
426			if (*presp) {
427			rctx->state = OHS_DONE;
428			return 1;
429			}
430
431			rctx->state = OHS_ERROR;
432			return 0;
433
434			case OHS_DONE:
435			return 1;
436			}
437
438			return 0;
439			}
440
441			/* Blocking OCSP request handler: now a special case of non-blocking I/O */
442			OCSP_RESPONSE *
443			OCSP_sendreq_bio(BIO b, char path, OCSP_REQUEST *req)
444			{
445			OCSP_RESPONSE *resp = NULL;
446			OCSP_REQ_CTX *ctx;
447			int rv;
448
449			ctx = OCSP_sendreq_new(b, path, req, -1);
450			if (ctx == NULL)
451			return NULL;
452
453			do {
454			rv = OCSP_sendreq_nbio(&resp, ctx);
455			} while ((rv == -1) && BIO_should_retry(b));
456
457			OCSP_REQ_CTX_free(ctx);
458
459			if (rv)
460			return resp;
461
462			return NULL;
463			}