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buffer.c

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1/* $OpenBSD: buffer.c,v 1.27 2017/05/02 03:59:44 deraadt Exp $ */-
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)-
3 * All rights reserved.-
4 *-
5 * This package is an SSL implementation written-
6 * by Eric Young (eay@cryptsoft.com).-
7 * The implementation was written so as to conform with Netscapes SSL.-
8 *-
9 * This library is free for commercial and non-commercial use as long as-
10 * the following conditions are aheared to. The following conditions-
11 * apply to all code found in this distribution, be it the RC4, RSA,-
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation-
13 * included with this distribution is covered by the same copyright terms-
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).-
15 *-
16 * Copyright remains Eric Young's, and as such any Copyright notices in-
17 * the code are not to be removed.-
18 * If this package is used in a product, Eric Young should be given attribution-
19 * as the author of the parts of the library used.-
20 * This can be in the form of a textual message at program startup or-
21 * in documentation (online or textual) provided with the package.-
22 *-
23 * Redistribution and use in source and binary forms, with or without-
24 * modification, are permitted provided that the following conditions-
25 * are met:-
26 * 1. Redistributions of source code must retain the copyright-
27 * notice, this list of conditions and the following disclaimer.-
28 * 2. Redistributions in binary form must reproduce the above copyright-
29 * notice, this list of conditions and the following disclaimer in the-
30 * documentation and/or other materials provided with the distribution.-
31 * 3. All advertising materials mentioning features or use of this software-
32 * must display the following acknowledgement:-
33 * "This product includes cryptographic software written by-
34 * Eric Young (eay@cryptsoft.com)"-
35 * The word 'cryptographic' can be left out if the rouines from the library-
36 * being used are not cryptographic related :-).-
37 * 4. If you include any Windows specific code (or a derivative thereof) from-
38 * the apps directory (application code) you must include an acknowledgement:-
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"-
40 *-
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND-
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE-
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE-
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE-
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL-
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS-
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)-
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT-
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY-
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF-
51 * SUCH DAMAGE.-
52 *-
53 * The licence and distribution terms for any publically available version or-
54 * derivative of this code cannot be changed. i.e. this code cannot simply be-
55 * copied and put under another distribution licence-
56 * [including the GNU Public Licence.]-
57 */-
58-
59#include <stdio.h>-
60#include <stdlib.h>-
61#include <string.h>-
62-
63#include <openssl/buffer.h>-
64#include <openssl/err.h>-
65-
66/*-
67 * LIMIT_BEFORE_EXPANSION is the maximum n such that (n + 3) / 3 * 4 < 2**31.-
68 * That function is applied in several functions in this file and this limit-
69 * ensures that the result fits in an int.-
70 */-
71#define LIMIT_BEFORE_EXPANSION 0x5ffffffc-
72-
73BUF_MEM *-
74BUF_MEM_new(void)-
75{-
76 BUF_MEM *ret;-
77-
78 if ((ret = calloc(1, sizeof(BUF_MEM))) == NULL) {
(ret = calloc(...== ((void *)0)Description
TRUEnever evaluated
FALSEevaluated 2708 times by 10 tests
Evaluated by:
  • asn1test
  • base64test
  • clienttest
  • keypairtest
  • libcrypto.so.44.0.1
  • pkcs7test
  • servertest
  • ssltest
  • tlstest
  • verifytest
0-2708
79 BUFerror(ERR_R_MALLOC_FAILURE);-
80 return (NULL);
never executed: return ( ((void *)0) );
0
81 }-
82-
83 return (ret);
executed 2708 times by 10 tests: return (ret);
Executed by:
  • asn1test
  • base64test
  • clienttest
  • keypairtest
  • libcrypto.so.44.0.1
  • pkcs7test
  • servertest
  • ssltest
  • tlstest
  • verifytest
2708
84}-
85-
86void-
87BUF_MEM_free(BUF_MEM *a)-
88{-
89 if (a == NULL)
a == ((void *)0)Description
TRUEevaluated 502 times by 12 tests
Evaluated by:
  • cipher_list
  • cipherstest
  • clienttest
  • freenull
  • libcrypto.so.44.0.1
  • servertest
  • ssl_versions
  • ssltest
  • tls_ext_alpn
  • tls_prf
  • tlsexttest
  • tlstest
FALSEevaluated 1660 times by 10 tests
Evaluated by:
  • asn1test
  • base64test
  • clienttest
  • keypairtest
  • libcrypto.so.44.0.1
  • pkcs7test
  • servertest
  • ssltest
  • tlstest
  • verifytest
502-1660
90 return;
executed 502 times by 12 tests: return;
Executed by:
  • cipher_list
  • cipherstest
  • clienttest
  • freenull
  • libcrypto.so.44.0.1
  • servertest
  • ssl_versions
  • ssltest
  • tls_ext_alpn
  • tls_prf
  • tlsexttest
  • tlstest
502
91-
92 freezero(a->data, a->max);-
93 free(a);-
94}
executed 1660 times by 10 tests: end of block
Executed by:
  • asn1test
  • base64test
  • clienttest
  • keypairtest
  • libcrypto.so.44.0.1
  • pkcs7test
  • servertest
  • ssltest
  • tlstest
  • verifytest
1660
95-
96int-
97BUF_MEM_grow(BUF_MEM *str, size_t len)-
98{-
99 return BUF_MEM_grow_clean(str, len);
executed 8446 times by 9 tests: return BUF_MEM_grow_clean(str, len);
Executed by:
  • asn1test
  • clienttest
  • keypairtest
  • libcrypto.so.44.0.1
  • pkcs7test
  • servertest
  • ssltest
  • tlstest
  • verifytest
8446
100}-
101-
102int-
103BUF_MEM_grow_clean(BUF_MEM *str, size_t len)-
104{-
105 char *ret;-
106 size_t n;-
107-
108 if (str->max >= len) {
str->max >= lenDescription
TRUEevaluated 7020 times by 9 tests
Evaluated by:
  • asn1test
  • base64test
  • clienttest
  • keypairtest
  • libcrypto.so.44.0.1
  • pkcs7test
  • servertest
  • ssltest
  • tlstest
FALSEevaluated 3223 times by 10 tests
Evaluated by:
  • asn1test
  • base64test
  • clienttest
  • keypairtest
  • libcrypto.so.44.0.1
  • pkcs7test
  • servertest
  • ssltest
  • tlstest
  • verifytest
3223-7020
109 if (str->length >= len)
str->length >= lenDescription
TRUEevaluated 1298 times by 8 tests
Evaluated by:
  • asn1test
  • clienttest
  • keypairtest
  • libcrypto.so.44.0.1
  • pkcs7test
  • servertest
  • ssltest
  • tlstest
FALSEevaluated 5722 times by 8 tests
Evaluated by:
  • asn1test
  • base64test
  • keypairtest
  • libcrypto.so.44.0.1
  • pkcs7test
  • servertest
  • ssltest
  • tlstest
1298-5722
110 memset(&str->data[len], 0, str->length - len);
executed 1298 times by 8 tests: memset(&str->data[len], 0, str->length - len);
Executed by:
  • asn1test
  • clienttest
  • keypairtest
  • libcrypto.so.44.0.1
  • pkcs7test
  • servertest
  • ssltest
  • tlstest
1298
111 str->length = len;-
112 return (len);
executed 7020 times by 9 tests: return (len);
Executed by:
  • asn1test
  • base64test
  • clienttest
  • keypairtest
  • libcrypto.so.44.0.1
  • pkcs7test
  • servertest
  • ssltest
  • tlstest
7020
113 }-
114-
115 if (len > LIMIT_BEFORE_EXPANSION) {
len > 0x5ffffffcDescription
TRUEnever evaluated
FALSEevaluated 3223 times by 10 tests
Evaluated by:
  • asn1test
  • base64test
  • clienttest
  • keypairtest
  • libcrypto.so.44.0.1
  • pkcs7test
  • servertest
  • ssltest
  • tlstest
  • verifytest
0-3223
116 BUFerror(ERR_R_MALLOC_FAILURE);-
117 return 0;
never executed: return 0;
0
118 }-
119-
120 n = (len + 3) / 3 * 4;-
121 if ((ret = recallocarray(str->data, str->max, n, 1)) == NULL) {
(ret = recallo...== ((void *)0)Description
TRUEnever evaluated
FALSEevaluated 3223 times by 10 tests
Evaluated by:
  • asn1test
  • base64test
  • clienttest
  • keypairtest
  • libcrypto.so.44.0.1
  • pkcs7test
  • servertest
  • ssltest
  • tlstest
  • verifytest
0-3223
122 BUFerror(ERR_R_MALLOC_FAILURE);-
123 return (0);
never executed: return (0);
0
124 }-
125 str->data = ret;-
126 str->max = n;-
127 str->length = len;-
128-
129 return (len);
executed 3223 times by 10 tests: return (len);
Executed by:
  • asn1test
  • base64test
  • clienttest
  • keypairtest
  • libcrypto.so.44.0.1
  • pkcs7test
  • servertest
  • ssltest
  • tlstest
  • verifytest
3223
130}-
131-
132void-
133BUF_reverse(unsigned char *out, const unsigned char *in, size_t size)-
134{-
135 size_t i;-
136-
137 if (in) {
inDescription
TRUEnever evaluated
FALSEnever evaluated
0
138 out += size - 1;-
139 for (i = 0; i < size; i++)
i < sizeDescription
TRUEnever evaluated
FALSEnever evaluated
0
140 *out-- = *in++;
never executed: *out-- = *in++;
0
141 } else {
never executed: end of block
0
142 unsigned char *q;-
143 char c;-
144 q = out + size - 1;-
145 for (i = 0; i < size / 2; i++) {
i < size / 2Description
TRUEnever evaluated
FALSEnever evaluated
0
146 c = *q;-
147 *q-- = *out;-
148 *out++ = c;-
149 }
never executed: end of block
0
150 }
never executed: end of block
0
151}-
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