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buffer.c

Absolute File Name:/home/opencoverage/opencoverage/guest-scripts/openssl/src/crypto/buffer/buffer.c
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1/*-
2 * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.-
3 *-
4 * Licensed under the OpenSSL license (the "License"). You may not use-
5 * this file except in compliance with the License. You can obtain a copy-
6 * in the file LICENSE in the source distribution or at-
7 * https://www.openssl.org/source/license.html-
8 */-
9-
10#include <stdio.h>-
11#include "internal/cryptlib.h"-
12#include <openssl/buffer.h>-
13-
14/*-
15 * LIMIT_BEFORE_EXPANSION is the maximum n such that (n+3)/3*4 < 2**31. That-
16 * function is applied in several functions in this file and this limit-
17 * ensures that the result fits in an int.-
18 */-
19#define LIMIT_BEFORE_EXPANSION 0x5ffffffc-
20-
21BUF_MEM *BUF_MEM_new_ex(unsigned long flags)-
22{-
23 BUF_MEM *ret;-
24-
25 ret = BUF_MEM_new();-
26 if (ret != NULL)
ret != ((void *)0)Description
TRUEevaluated 111695 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
FALSEnever evaluated
0-111695
27 ret->flags = flags;
executed 111695 times by 1 test: ret->flags = flags;
Executed by:
  • libcrypto.so.1.1
111695
28 return ret;
executed 111695 times by 1 test: return ret;
Executed by:
  • libcrypto.so.1.1
111695
29}-
30-
31BUF_MEM *BUF_MEM_new(void)-
32{-
33 BUF_MEM *ret;-
34-
35 ret = OPENSSL_zalloc(sizeof(*ret));-
36 if (ret == NULL) {
ret == ((void *)0)Description
TRUEnever evaluated
FALSEevaluated 520915 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
0-520915
37 BUFerr(BUF_F_BUF_MEM_NEW, ERR_R_MALLOC_FAILURE);-
38 return NULL;
never executed: return ((void *)0) ;
0
39 }-
40 return ret;
executed 520915 times by 1 test: return ret;
Executed by:
  • libcrypto.so.1.1
520915
41}-
42-
43void BUF_MEM_free(BUF_MEM *a)-
44{-
45 if (a == NULL)
a == ((void *)0)Description
TRUEevaluated 48617 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
FALSEevaluated 400405 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
48617-400405
46 return;
executed 48617 times by 1 test: return;
Executed by:
  • libcrypto.so.1.1
48617
47 if (a->data != NULL) {
a->data != ((void *)0)Description
TRUEevaluated 185075 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
FALSEevaluated 215330 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
185075-215330
48 if (a->flags & BUF_MEM_FLAG_SECURE)
a->flags & 0x01Description
TRUEevaluated 7751 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
FALSEevaluated 177324 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
7751-177324
49 OPENSSL_secure_clear_free(a->data, a->max);
executed 7751 times by 1 test: CRYPTO_secure_clear_free(a->data, a->max, __FILE__, 49);
Executed by:
  • libcrypto.so.1.1
7751
50 else-
51 OPENSSL_clear_free(a->data, a->max);
executed 177324 times by 1 test: CRYPTO_clear_free(a->data, a->max, __FILE__, 51);
Executed by:
  • libcrypto.so.1.1
177324
52 }-
53 OPENSSL_free(a);-
54}
executed 400405 times by 1 test: end of block
Executed by:
  • libcrypto.so.1.1
400405
55-
56/* Allocate a block of secure memory; copy over old data if there-
57 * was any, and then free it. */-
58static char *sec_alloc_realloc(BUF_MEM *str, size_t len)-
59{-
60 char *ret;-
61-
62 ret = OPENSSL_secure_malloc(len);-
63 if (str->data != NULL) {
str->data != ((void *)0)Description
TRUEevaluated 33012 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
FALSEevaluated 7751 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
7751-33012
64 if (ret != NULL) {
ret != ((void *)0)Description
TRUEevaluated 33012 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
FALSEnever evaluated
0-33012
65 memcpy(ret, str->data, str->length);-
66 OPENSSL_secure_clear_free(str->data, str->length);-
67 str->data = NULL;-
68 }
executed 33012 times by 1 test: end of block
Executed by:
  • libcrypto.so.1.1
33012
69 }
executed 33012 times by 1 test: end of block
Executed by:
  • libcrypto.so.1.1
33012
70 return ret;
executed 40763 times by 1 test: return ret;
Executed by:
  • libcrypto.so.1.1
40763
71}-
72-
73size_t BUF_MEM_grow(BUF_MEM *str, size_t len)-
74{-
75 char *ret;-
76 size_t n;-
77-
78 if (str->length >= len) {
str->length >= lenDescription
TRUEevaluated 168621 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
FALSEevaluated 279011 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
168621-279011
79 str->length = len;-
80 return len;
executed 168621 times by 1 test: return len;
Executed by:
  • libcrypto.so.1.1
168621
81 }-
82 if (str->max >= len) {
str->max >= lenDescription
TRUEevaluated 18361 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
FALSEevaluated 260650 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
18361-260650
83 if (str->data != NULL)
str->data != ((void *)0)Description
TRUEevaluated 18361 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
FALSEnever evaluated
0-18361
84 memset(&str->data[str->length], 0, len - str->length);
executed 18361 times by 1 test: memset(&str->data[str->length], 0, len - str->length);
Executed by:
  • libcrypto.so.1.1
18361
85 str->length = len;-
86 return len;
executed 18361 times by 1 test: return len;
Executed by:
  • libcrypto.so.1.1
18361
87 }-
88 /* This limit is sufficient to ensure (len+3)/3*4 < 2**31 */-
89 if (len > LIMIT_BEFORE_EXPANSION) {
len > 0x5ffffffcDescription
TRUEnever evaluated
FALSEevaluated 260650 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
0-260650
90 BUFerr(BUF_F_BUF_MEM_GROW, ERR_R_MALLOC_FAILURE);-
91 return 0;
never executed: return 0;
0
92 }-
93 n = (len + 3) / 3 * 4;-
94 if ((str->flags & BUF_MEM_FLAG_SECURE))
(str->flags & 0x01)Description
TRUEnever evaluated
FALSEevaluated 260650 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
0-260650
95 ret = sec_alloc_realloc(str, n);
never executed: ret = sec_alloc_realloc(str, n);
0
96 else-
97 ret = OPENSSL_realloc(str->data, n);
executed 260650 times by 1 test: ret = CRYPTO_realloc(str->data, n, __FILE__, 97);
Executed by:
  • libcrypto.so.1.1
260650
98 if (ret == NULL) {
ret == ((void *)0)Description
TRUEnever evaluated
FALSEevaluated 260650 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
0-260650
99 BUFerr(BUF_F_BUF_MEM_GROW, ERR_R_MALLOC_FAILURE);-
100 len = 0;-
101 } else {
never executed: end of block
0
102 str->data = ret;-
103 str->max = n;-
104 memset(&str->data[str->length], 0, len - str->length);-
105 str->length = len;-
106 }
executed 260650 times by 1 test: end of block
Executed by:
  • libcrypto.so.1.1
260650
107 return len;
executed 260650 times by 1 test: return len;
Executed by:
  • libcrypto.so.1.1
260650
108}-
109-
110size_t BUF_MEM_grow_clean(BUF_MEM *str, size_t len)-
111{-
112 char *ret;-
113 size_t n;-
114-
115 if (str->length >= len) {
str->length >= lenDescription
TRUEevaluated 25688 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
FALSEevaluated 1016139 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
25688-1016139
116 if (str->data != NULL)
str->data != ((void *)0)Description
TRUEevaluated 25688 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
FALSEnever evaluated
0-25688
117 memset(&str->data[len], 0, str->length - len);
executed 25688 times by 1 test: memset(&str->data[len], 0, str->length - len);
Executed by:
  • libcrypto.so.1.1
25688
118 str->length = len;-
119 return len;
executed 25688 times by 1 test: return len;
Executed by:
  • libcrypto.so.1.1
25688
120 }-
121 if (str->max >= len) {
str->max >= lenDescription
TRUEevaluated 785629 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
FALSEevaluated 230510 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
230510-785629
122 memset(&str->data[str->length], 0, len - str->length);-
123 str->length = len;-
124 return len;
executed 785629 times by 1 test: return len;
Executed by:
  • libcrypto.so.1.1
785629
125 }-
126 /* This limit is sufficient to ensure (len+3)/3*4 < 2**31 */-
127 if (len > LIMIT_BEFORE_EXPANSION) {
len > 0x5ffffffcDescription
TRUEnever evaluated
FALSEevaluated 230510 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
0-230510
128 BUFerr(BUF_F_BUF_MEM_GROW_CLEAN, ERR_R_MALLOC_FAILURE);-
129 return 0;
never executed: return 0;
0
130 }-
131 n = (len + 3) / 3 * 4;-
132 if ((str->flags & BUF_MEM_FLAG_SECURE))
(str->flags & 0x01)Description
TRUEevaluated 40763 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
FALSEevaluated 189747 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
40763-189747
133 ret = sec_alloc_realloc(str, n);
executed 40763 times by 1 test: ret = sec_alloc_realloc(str, n);
Executed by:
  • libcrypto.so.1.1
40763
134 else-
135 ret = OPENSSL_clear_realloc(str->data, str->max, n);
executed 189747 times by 1 test: ret = CRYPTO_clear_realloc(str->data, str->max, n, __FILE__, 135);
Executed by:
  • libcrypto.so.1.1
189747
136 if (ret == NULL) {
ret == ((void *)0)Description
TRUEnever evaluated
FALSEevaluated 230510 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
0-230510
137 BUFerr(BUF_F_BUF_MEM_GROW_CLEAN, ERR_R_MALLOC_FAILURE);-
138 len = 0;-
139 } else {
never executed: end of block
0
140 str->data = ret;-
141 str->max = n;-
142 memset(&str->data[str->length], 0, len - str->length);-
143 str->length = len;-
144 }
executed 230510 times by 1 test: end of block
Executed by:
  • libcrypto.so.1.1
230510
145 return len;
executed 230510 times by 1 test: return len;
Executed by:
  • libcrypto.so.1.1
230510
146}-
147-
148void BUF_reverse(unsigned char *out, const unsigned char *in, size_t size)-
149{-
150 size_t i;-
151 if (in) {
inDescription
TRUEevaluated 3 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
FALSEevaluated 123 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
3-123
152 out += size - 1;-
153 for (i = 0; i < size; i++)
i < sizeDescription
TRUEevaluated 24 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
FALSEevaluated 3 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
3-24
154 *out-- = *in++;
executed 24 times by 1 test: *out-- = *in++;
Executed by:
  • libcrypto.so.1.1
24
155 } else {
executed 3 times by 1 test: end of block
Executed by:
  • libcrypto.so.1.1
3
156 unsigned char *q;-
157 char c;-
158 q = out + size - 1;-
159 for (i = 0; i < size / 2; i++) {
i < size / 2Description
TRUEevaluated 348 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
FALSEevaluated 123 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
123-348
160 c = *q;-
161 *q-- = *out;-
162 *out++ = c;-
163 }
executed 348 times by 1 test: end of block
Executed by:
  • libcrypto.so.1.1
348
164 }
executed 123 times by 1 test: end of block
Executed by:
  • libcrypto.so.1.1
123
165}-
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