mirror of
https://github.com/libp2p/go-openssl.git
synced 2025-01-29 05:10:10 +08:00
space monkey internal commit export
[katamari commit: 53135767bbc8a5d26c9a2db6e3e66791f36398b8]
This commit is contained in:
JT Olds
parent
46356e074d
commit
a9b372afa5
8
conn.go
8
conn.go
@ -358,6 +358,14 @@ func (c *Conn) Write(b []byte) (written int, err error) {
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return 0, err
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}
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func (c *Conn) VerifyHostname(host string) error {
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cert, err := c.PeerCertificate()
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if err != nil {
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return err
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}
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return cert.VerifyHostname(host)
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}
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func (c *Conn) LocalAddr() net.Addr {
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return c.conn.LocalAddr()
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}
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367
hostname.c
Normal file
367
hostname.c
Normal file
@ -0,0 +1,367 @@
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/* Go-OpenSSL notice:
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This file is required for all OpenSSL versions prior to 1.1.0. This simply
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provides the new 1.1.0 X509_check_* methods for hostname validation if they
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don't already exist.
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*/
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#include <openssl/x509.h>
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#ifndef X509_CHECK_FLAG_ALWAYS_CHECK_SUBJECT
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/* portions from x509v3.h and v3_utl.c */
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/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
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* project.
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*/
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/* ====================================================================
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* Copyright (c) 1999-2003 The OpenSSL 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 OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* licensing@OpenSSL.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL 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 OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL 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 OpenSSL 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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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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/* X509 v3 extension utilities */
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#include <stdlib.h>
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#include <openssl/ssl.h>
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#include <openssl/conf.h>
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#include <openssl/x509v3.h>
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#define X509_CHECK_FLAG_ALWAYS_CHECK_SUBJECT 0x1
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#define X509_CHECK_FLAG_NO_WILDCARDS 0x2
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typedef int (*equal_fn)(const unsigned char *pattern, size_t pattern_len,
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const unsigned char *subject, size_t subject_len);
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/* Compare while ASCII ignoring case. */
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static int equal_nocase(const unsigned char *pattern, size_t pattern_len,
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const unsigned char *subject, size_t subject_len)
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{
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if (pattern_len != subject_len)
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return 0;
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while (pattern_len)
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{
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unsigned char l = *pattern;
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unsigned char r = *subject;
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/* The pattern must not contain NUL characters. */
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if (l == 0)
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return 0;
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if (l != r)
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{
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if ('A' <= l && l <= 'Z')
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l = (l - 'A') + 'a';
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if ('A' <= r && r <= 'Z')
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r = (r - 'A') + 'a';
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if (l != r)
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return 0;
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}
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++pattern;
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++subject;
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--pattern_len;
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}
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return 1;
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}
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/* Compare using memcmp. */
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static int equal_case(const unsigned char *pattern, size_t pattern_len,
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const unsigned char *subject, size_t subject_len)
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{
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/* The pattern must not contain NUL characters. */
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if (memchr(pattern, '\0', pattern_len) != NULL)
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return 0;
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if (pattern_len != subject_len)
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return 0;
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return !memcmp(pattern, subject, pattern_len);
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}
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/* RFC 5280, section 7.5, requires that only the domain is compared in
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a case-insensitive manner. */
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static int equal_email(const unsigned char *a, size_t a_len,
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const unsigned char *b, size_t b_len)
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{
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size_t i = a_len;
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if (a_len != b_len)
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return 0;
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/* We search backwards for the '@' character, so that we do
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not have to deal with quoted local-parts. The domain part
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is compared in a case-insensitive manner. */
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while (i > 0)
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{
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--i;
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if (a[i] == '@' || b[i] == '@')
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{
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if (!equal_nocase(a + i, a_len - i,
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b + i, a_len - i))
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return 0;
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break;
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}
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}
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if (i == 0)
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i = a_len;
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return equal_case(a, i, b, i);
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}
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/* Compare the prefix and suffix with the subject, and check that the
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characters in-between are valid. */
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static int wildcard_match(const unsigned char *prefix, size_t prefix_len,
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const unsigned char *suffix, size_t suffix_len,
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const unsigned char *subject, size_t subject_len)
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{
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const unsigned char *wildcard_start;
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const unsigned char *wildcard_end;
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const unsigned char *p;
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if (subject_len < prefix_len + suffix_len)
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return 0;
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if (!equal_nocase(prefix, prefix_len, subject, prefix_len))
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return 0;
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wildcard_start = subject + prefix_len;
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wildcard_end = subject + (subject_len - suffix_len);
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if (!equal_nocase(wildcard_end, suffix_len, suffix, suffix_len))
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return 0;
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/* The wildcard must match at least one character. */
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if (wildcard_start == wildcard_end)
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return 0;
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/* Check that the part matched by the wildcard contains only
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permitted characters and only matches a single label. */
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for (p = wildcard_start; p != wildcard_end; ++p)
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if (!(('0' <= *p && *p <= '9') ||
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('A' <= *p && *p <= 'Z') ||
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('a' <= *p && *p <= 'z') ||
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*p == '-'))
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return 0;
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return 1;
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}
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/* Checks if the memory region consistens of [0-9A-Za-z.-]. */
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static int valid_domain_characters(const unsigned char *p, size_t len)
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{
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while (len)
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{
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if (!(('0' <= *p && *p <= '9') ||
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('A' <= *p && *p <= 'Z') ||
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('a' <= *p && *p <= 'z') ||
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*p == '-' || *p == '.'))
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return 0;
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++p;
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--len;
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}
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return 1;
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}
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/* Find the '*' in a wildcard pattern. If no such character is found
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or the pattern is otherwise invalid, returns NULL. */
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static const unsigned char *wildcard_find_star(const unsigned char *pattern,
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size_t pattern_len)
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{
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const unsigned char *star = memchr(pattern, '*', pattern_len);
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size_t dot_count = 0;
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const unsigned char *suffix_start;
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size_t suffix_length;
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if (star == NULL)
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return NULL;
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suffix_start = star + 1;
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suffix_length = (pattern + pattern_len) - (star + 1);
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if (!(valid_domain_characters(pattern, star - pattern) &&
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valid_domain_characters(suffix_start, suffix_length)))
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return NULL;
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/* Check that the suffix matches at least two labels. */
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while (suffix_length)
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{
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if (*suffix_start == '.')
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++dot_count;
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++suffix_start;
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--suffix_length;
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}
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if (dot_count < 2)
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return NULL;
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return star;
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}
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/* Compare using wildcards. */
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static int equal_wildcard(const unsigned char *pattern, size_t pattern_len,
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const unsigned char *subject, size_t subject_len)
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{
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const unsigned char *star = wildcard_find_star(pattern, pattern_len);
|
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if (star == NULL)
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return equal_nocase(pattern, pattern_len,
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subject, subject_len);
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return wildcard_match(pattern, star - pattern,
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star + 1, (pattern + pattern_len) - star - 1,
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subject, subject_len);
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}
|
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|
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/* Compare an ASN1_STRING to a supplied string. If they match
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* return 1. If cmp_type > 0 only compare if string matches the
|
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* type, otherwise convert it to UTF8.
|
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*/
|
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static int do_check_string(ASN1_STRING *a, int cmp_type, equal_fn equal,
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const unsigned char *b, size_t blen)
|
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{
|
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if (!a->data || !a->length)
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return 0;
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if (cmp_type > 0)
|
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{
|
||||
if (cmp_type != a->type)
|
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return 0;
|
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if (cmp_type == V_ASN1_IA5STRING)
|
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return equal(a->data, a->length, b, blen);
|
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if (a->length == (int)blen && !memcmp(a->data, b, blen))
|
||||
return 1;
|
||||
else
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return 0;
|
||||
}
|
||||
else
|
||||
{
|
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int astrlen, rv;
|
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unsigned char *astr;
|
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astrlen = ASN1_STRING_to_UTF8(&astr, a);
|
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if (astrlen < 0)
|
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return -1;
|
||||
rv = equal(astr, astrlen, b, blen);
|
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OPENSSL_free(astr);
|
||||
return rv;
|
||||
}
|
||||
}
|
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|
||||
static int do_x509_check(X509 *x, const unsigned char *chk, size_t chklen,
|
||||
unsigned int flags, int check_type)
|
||||
{
|
||||
STACK_OF(GENERAL_NAME) *gens = NULL;
|
||||
X509_NAME *name = NULL;
|
||||
int i;
|
||||
int cnid;
|
||||
int alt_type;
|
||||
equal_fn equal;
|
||||
if (check_type == GEN_EMAIL)
|
||||
{
|
||||
cnid = NID_pkcs9_emailAddress;
|
||||
alt_type = V_ASN1_IA5STRING;
|
||||
equal = equal_email;
|
||||
}
|
||||
else if (check_type == GEN_DNS)
|
||||
{
|
||||
cnid = NID_commonName;
|
||||
alt_type = V_ASN1_IA5STRING;
|
||||
if (flags & X509_CHECK_FLAG_NO_WILDCARDS)
|
||||
equal = equal_nocase;
|
||||
else
|
||||
equal = equal_wildcard;
|
||||
}
|
||||
else
|
||||
{
|
||||
cnid = 0;
|
||||
alt_type = V_ASN1_OCTET_STRING;
|
||||
equal = equal_case;
|
||||
}
|
||||
|
||||
if (chklen == 0)
|
||||
chklen = strlen((const char *)chk);
|
||||
|
||||
gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
|
||||
if (gens)
|
||||
{
|
||||
int rv = 0;
|
||||
for (i = 0; i < sk_GENERAL_NAME_num(gens); i++)
|
||||
{
|
||||
GENERAL_NAME *gen;
|
||||
ASN1_STRING *cstr;
|
||||
gen = sk_GENERAL_NAME_value(gens, i);
|
||||
if(gen->type != check_type)
|
||||
continue;
|
||||
if (check_type == GEN_EMAIL)
|
||||
cstr = gen->d.rfc822Name;
|
||||
else if (check_type == GEN_DNS)
|
||||
cstr = gen->d.dNSName;
|
||||
else
|
||||
cstr = gen->d.iPAddress;
|
||||
if (do_check_string(cstr, alt_type, equal, chk, chklen))
|
||||
{
|
||||
rv = 1;
|
||||
break;
|
||||
}
|
||||
}
|
||||
GENERAL_NAMES_free(gens);
|
||||
if (rv)
|
||||
return 1;
|
||||
if (!(flags & X509_CHECK_FLAG_ALWAYS_CHECK_SUBJECT) || !cnid)
|
||||
return 0;
|
||||
}
|
||||
i = -1;
|
||||
name = X509_get_subject_name(x);
|
||||
while((i = X509_NAME_get_index_by_NID(name, cnid, i)) >= 0)
|
||||
{
|
||||
X509_NAME_ENTRY *ne;
|
||||
ASN1_STRING *str;
|
||||
ne = X509_NAME_get_entry(name, i);
|
||||
str = X509_NAME_ENTRY_get_data(ne);
|
||||
if (do_check_string(str, -1, equal, chk, chklen))
|
||||
return 1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
int X509_check_host(X509 *x, const unsigned char *chk, size_t chklen,
|
||||
unsigned int flags)
|
||||
{
|
||||
return do_x509_check(x, chk, chklen, flags, GEN_DNS);
|
||||
}
|
||||
|
||||
int X509_check_email(X509 *x, const unsigned char *chk, size_t chklen,
|
||||
unsigned int flags)
|
||||
{
|
||||
return do_x509_check(x, chk, chklen, flags, GEN_EMAIL);
|
||||
}
|
||||
|
||||
int X509_check_ip(X509 *x, const unsigned char *chk, size_t chklen,
|
||||
unsigned int flags)
|
||||
{
|
||||
return do_x509_check(x, chk, chklen, flags, GEN_IPADD);
|
||||
}
|
||||
|
||||
#endif
|
||||
98
hostname.go
Normal file
98
hostname.go
Normal file
@ -0,0 +1,98 @@
|
||||
// Copyright (C) 2014 Space Monkey, Inc.
|
||||
|
||||
package openssl
|
||||
|
||||
/*
|
||||
#cgo pkg-config: openssl
|
||||
#include <openssl/ssl.h>
|
||||
#include <openssl/conf.h>
|
||||
#include <openssl/x509.h>
|
||||
|
||||
#ifndef X509_CHECK_FLAG_ALWAYS_CHECK_SUBJECT
|
||||
#define X509_CHECK_FLAG_ALWAYS_CHECK_SUBJECT 0x1
|
||||
#define X509_CHECK_FLAG_NO_WILDCARDS 0x2
|
||||
|
||||
extern int X509_check_host(X509 *x, const unsigned char *chk, size_t chklen,
|
||||
unsigned int flags);
|
||||
extern int X509_check_email(X509 *x, const unsigned char *chk, size_t chklen,
|
||||
unsigned int flags);
|
||||
extern int X509_check_ip(X509 *x, const unsigned char *chk, size_t chklen,
|
||||
unsigned int flags);
|
||||
#endif
|
||||
*/
|
||||
import "C"
|
||||
|
||||
import (
|
||||
"net"
|
||||
"unsafe"
|
||||
|
||||
"code.spacemonkey.com/go/errors"
|
||||
)
|
||||
|
||||
var (
|
||||
ValidationError = errors.New(SSLError, "Host validation error")
|
||||
)
|
||||
|
||||
type CheckFlags int
|
||||
|
||||
const (
|
||||
AlwaysCheckSubject CheckFlags = C.X509_CHECK_FLAG_ALWAYS_CHECK_SUBJECT
|
||||
NoWildcards CheckFlags = C.X509_CHECK_FLAG_NO_WILDCARDS
|
||||
)
|
||||
|
||||
func (c *Certificate) CheckHost(host string, flags CheckFlags) error {
|
||||
chost := unsafe.Pointer(C.CString(host))
|
||||
defer C.free(chost)
|
||||
rv := C.X509_check_host(c.x, (*C.uchar)(chost), C.size_t(len(host)),
|
||||
C.uint(flags))
|
||||
if rv > 0 {
|
||||
return nil
|
||||
}
|
||||
if rv == 0 {
|
||||
return ValidationError.New(
|
||||
"cert failed validation for host %s", host)
|
||||
}
|
||||
return SSLError.New("hostname validation failed")
|
||||
}
|
||||
|
||||
func (c *Certificate) CheckEmail(email string, flags CheckFlags) error {
|
||||
cemail := unsafe.Pointer(C.CString(email))
|
||||
defer C.free(cemail)
|
||||
rv := C.X509_check_email(c.x, (*C.uchar)(cemail), C.size_t(len(email)),
|
||||
C.uint(flags))
|
||||
if rv > 0 {
|
||||
return nil
|
||||
}
|
||||
if rv == 0 {
|
||||
return ValidationError.New(
|
||||
"cert failed validation for email %s", email)
|
||||
}
|
||||
return SSLError.New("email validation failed")
|
||||
}
|
||||
|
||||
func (c *Certificate) CheckIP(ip net.IP, flags CheckFlags) error {
|
||||
cip := unsafe.Pointer(&ip[0])
|
||||
rv := C.X509_check_ip(c.x, (*C.uchar)(cip), C.size_t(len(ip)),
|
||||
C.uint(flags))
|
||||
if rv > 0 {
|
||||
return nil
|
||||
}
|
||||
if rv == 0 {
|
||||
return ValidationError.New(
|
||||
"cert failed validation for ip %s", ip.String())
|
||||
}
|
||||
return SSLError.New("ip validation failed")
|
||||
}
|
||||
|
||||
func (c *Certificate) VerifyHostname(host string) error {
|
||||
var ip net.IP
|
||||
if len(host) >= 3 && host[0] == '[' && host[len(host)-1] == ']' {
|
||||
ip = net.ParseIP(host[1 : len(host)-1])
|
||||
} else {
|
||||
ip = net.ParseIP(host)
|
||||
}
|
||||
if ip != nil {
|
||||
return c.CheckIP(ip, 0)
|
||||
}
|
||||
return c.CheckHost(host, 0)
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user