/src/wolfssl-heapmath/src/ssl_misc.c

Source (jump to first uncovered line)
/* ssl_misc.c
 *
 * Copyright (C) 2006-2025 wolfSSL Inc.
 *
 * This file is part of wolfSSL.
 *
 * wolfSSL is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * wolfSSL is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
 */

#include <wolfssl/wolfcrypt/libwolfssl_sources.h>

#if !defined(WOLFSSL_SSL_MISC_INCLUDED)
    #ifndef WOLFSSL_IGNORE_FILE_WARN
        #warning ssl_misc.c does not need to be compiled separately from ssl.c
    #endif
#else

#if defined(OPENSSL_EXTRA) && !defined(WOLFCRYPT_ONLY)
#ifndef NO_BIO

/* Amount of memory to allocate/add. */
#define READ_BIO_FILE_CHUNK     128

/* Read a file in chunks.
 *
 * Allocates a chunk and reads into it until it is full.
 *
 * @param [in, out] bio   BIO object to read with.
 * @param [out]     data  Read data in a new buffer.
 * @return  Negative on error.
 * @return  Number of bytes read on success.
 */
static int wolfssl_read_bio_file(WOLFSSL_BIO* bio, char** data)
{
    int ret = 0;
    char* mem;
    char* p;

    /* Allocate buffer to hold a chunk of data. */
    mem = (char*)XMALLOC(READ_BIO_FILE_CHUNK, NULL, DYNAMIC_TYPE_TMP_BUFFER);
    if (mem == NULL) {
        WOLFSSL_ERROR_MSG("Memory allocation error");
        ret = MEMORY_E;
    }

    if (ret == 0) {
        int sz;

        /* ret is the number of bytes read and is zero. */

        /* p is where to read in next chunk. */
        p = mem;
        /* Memory available to read into is one chunk. */
        sz = READ_BIO_FILE_CHUNK;
        /* Keep reading in chunks until no more or an error. */
        while ((sz = wolfSSL_BIO_read(bio, p, sz)) > 0) {
            int remaining;

            /* Update total read. */
            ret += sz;
            /* Calculate remaining unused memory. */
            remaining = READ_BIO_FILE_CHUNK - (ret % READ_BIO_FILE_CHUNK);
            /* Check for space remaining. */
            if (remaining != READ_BIO_FILE_CHUNK) {
                /* Update where data is read into. */
                p += sz;
                /* Maximum possible size is the remaining buffer size. */
                sz = remaining;
            }
            else {
                /* No space left for more data to be read - add a chunk. */
                p = (char*)XREALLOC(mem, ret + READ_BIO_FILE_CHUNK, NULL,
                    DYNAMIC_TYPE_TMP_BUFFER);
                if (p == NULL) {
                    sz = MEMORY_E;
                    break;
                }

                /* Set mem to new pointer. */
                mem = p;
                /* Set p to where to read in next chunk. */
                p += ret;
                /* Read in a new chunk. */
                sz = READ_BIO_FILE_CHUNK;
            }
        }
        if ((sz < 0) || (ret == 0)) {
            /* Dispose of memory on error or no data read. */
            XFREE(mem, NULL, DYNAMIC_TYPE_TMP_BUFFER);
            mem = NULL;
            /* Return error. */
            ret = sz;
        }
    }

    *data = mem;
    return ret;
}

/* Read exactly the required amount into a newly allocated buffer.
 *
 * @param [in, out] bio   BIO object to read with.
 * @param [in       sz    Amount of data to read.
 * @param [out]     data  Read data in a new buffer.
 * @return  Negative on error.
 * @return  Number of bytes read on success.
 */
static int wolfssl_read_bio_len(WOLFSSL_BIO* bio, int sz, char** data)
{
    int ret = 0;
    char* mem;

    /* Allocate buffer to hold data. */
    mem = (char*)XMALLOC((size_t)sz, NULL, DYNAMIC_TYPE_TMP_BUFFER);
    if (mem == NULL) {
        WOLFSSL_ERROR_MSG("Memory allocation error");
        ret = MEMORY_E;
    }
    else if ((ret = wolfSSL_BIO_read(bio, mem, sz)) != sz) {
        /* Pending data not read. */
        XFREE(mem, NULL, DYNAMIC_TYPE_TMP_BUFFER);
        mem = NULL;
        ret = MEMORY_E;
    }

    *data = mem;
    return ret;
}

/* Read all the data from a BIO.
 *
 * @param [in, out] bio         BIO object to read with.
 * @param [out]     data        Read data in a buffer.
 * @param [out]     dataSz      Amount of data read in bytes.
 * @param [out]     memAlloced  Indicates whether return buffer was allocated.
 * @return  Negative on error.
 * @return  0 on success.
 */
static int wolfssl_read_bio(WOLFSSL_BIO* bio, char** data, int* dataSz,
    int* memAlloced)
{
    int ret;
    int sz;

    if (bio->type == WOLFSSL_BIO_MEMORY) {
        ret = wolfSSL_BIO_get_mem_data(bio, data);
        if (ret > 0) {
            /* Advance the write index in the memory bio */
            WOLFSSL_BIO* mem_bio = bio;
            for (; mem_bio != NULL; mem_bio = mem_bio->next) {
                if (mem_bio->type == WOLFSSL_BIO_MEMORY)
                    break;
            }
            if (mem_bio == NULL)
                mem_bio = bio; /* Default to input */
            mem_bio->rdIdx += ret;
        }
        *memAlloced = 0;
    }
    /* Get pending or, when a file BIO, get length of file. */
    else if ((sz = wolfSSL_BIO_pending(bio)) > 0) {
        ret = wolfssl_read_bio_len(bio, sz, data);
        if (ret > 0) {
            *memAlloced = 1;
        }
    }
    else if (bio->type == WOLFSSL_BIO_FILE) {
        ret = wolfssl_read_bio_file(bio, data);
        if (ret > 0) {
            *memAlloced = 1;
        }
    }
    else {
        WOLFSSL_ERROR_MSG("No data read from bio");
        *memAlloced = 0;
        ret = NOT_COMPILED_IN;
    }

    if (ret >= 0) {
        *dataSz = ret;
        ret = 0;
    }

    return ret;
}
#endif /* !NO_BIO */
#endif /* OPENSSL_EXTRA && !WOLFCRYPT_ONLY */

#if (defined(OPENSSL_EXTRA) || defined(PERSIST_CERT_CACHE) || \
     !defined(NO_CERTS)) && !defined(WOLFCRYPT_ONLY) && !defined(NO_FILESYSTEM)
/* Read all the data from a file.
 *
 * @param [in]  fp          File pointer to read with.
 * @param [out] fileSz      Amount of data remaining in file in bytes.
 * @return  WOLFSSL_BAD_FILE on error.
 * @return  0 on success.
 */
static int wolfssl_file_len(XFILE fp, long* fileSz)
{
    int ret = 0;
    long sz = 0;
    long curr = 0;

    if (fp == XBADFILE) {
        ret = WOLFSSL_BAD_FILE;
    }
    if (ret == 0) {
        /* Get file offset at end of file. */
        curr = (long)XFTELL(fp);
        if (curr < 0) {
            ret = WOLFSSL_BAD_FILE;
        }
    }
    /* Move to end of file. */
    if ((ret == 0) && (XFSEEK(fp, 0, SEEK_END) != 0)) {
        ret = WOLFSSL_BAD_FILE;
    }
    if (ret == 0) {
        /* Get file offset at end of file and subtract current offset. */
        sz = (long)XFTELL(fp) - curr;
        if (sz < 0) {
            ret = WOLFSSL_BAD_FILE;
        }
    }
    /* Go back to original offset in file. */
    if ((ret == 0) && (XFSEEK(fp, curr, SEEK_SET) != 0)) {
        ret = WOLFSSL_BAD_FILE;
    }
    /* Validate size. */
    if ((ret == 0) && ((sz > MAX_WOLFSSL_FILE_SIZE) || (sz <= 0L))) {
        ret = WOLFSSL_BAD_FILE;
    }
    if (ret == 0) {
        *fileSz = sz;
    }

    return ret;
}
#endif

#if (defined(OPENSSL_EXTRA) || defined(PERSIST_CERT_CACHE)) && \
    !defined(WOLFCRYPT_ONLY) && !defined(NO_FILESYSTEM)
/* Read all the data from a file.
 *
 * @param [in]  fp          File pointer to read with.
 * @param [out] data        Read data in an allocated buffer.
 * @param [out] dataSz      Amount of data read in bytes.
 * @return  WOLFSSL_BAD_FILE when reading fails.
 * @return  MEMORY_E when memory allocation fails.
 * @return  0 on success.
 */
static int wolfssl_read_file(XFILE fp, char** data, int* dataSz)
{
    int ret = 0;
    long sz = 0;
    char* mem = NULL;

    ret = wolfssl_file_len(fp, &sz);
    if (ret == 0) {
        /* Allocate memory big enough to hold whole file. */
        mem = (char*)XMALLOC((size_t)sz, NULL, DYNAMIC_TYPE_TMP_BUFFER);
        if (mem == NULL) {
            ret = MEMORY_E;
        }
    }
    /* Read whole file into new buffer. */
    if ((ret == 0) && ((int)XFREAD(mem, 1, (size_t)sz, fp) != sz)) {
        ret = WOLFSSL_BAD_FILE;
    }
    if (ret == 0) {
        *dataSz = (int)sz;
        *data = mem;
        mem = NULL;
    }

    XFREE(mem, NULL, DYNAMIC_TYPE_TMP_BUFFER);
    return ret;
}
#endif /* (OPENSSL_EXTRA || PERSIST_CERT_CACHE) && !WOLFCRYPT_ONLY &&
        * !NO_FILESYSTEM */

#if !defined(WOLFCRYPT_ONLY) && !defined(NO_CERTS)

#ifdef WOLFSSL_SMALL_STACK

/* Buffer and size with no stack buffer. */
typedef struct {
    /* Dynamically allocated buffer. */
    byte* buffer;
    /* Size of buffer in bytes. */
    word32 sz;
} StaticBuffer;

/* Initialize static buffer.
 *
 * @param [in, out] sb  Static buffer.
 */
static void static_buffer_init(StaticBuffer* sb)
{
    sb->buffer = NULL;
    sb->sz = 0;
}

/* Set the size of the buffer.
 *
 * Can only set size once.
 *
 * @param [in] sb    Static buffer.
 * @param [in] len   Length required.
 * @param [in] heap  Dynamic memory allocation hint.
 * @param [in] type  Type of dynamic memory.
 * @return  0 on success.
 * @return  MEMORY_E when dynamic memory allocation fails.
 */
static int static_buffer_set_size(StaticBuffer* sb, word32 len, void* heap,
    int type)
{
    int ret = 0;

    (void)heap;
    (void)type;

    sb->buffer = (byte*)XMALLOC(len, heap, type);
    if (sb->buffer == NULL) {
        ret = MEMORY_E;
    }
    else {
        sb->sz = len;
    }

    return ret;
}

/* Dispose of dynamically allocated buffer.
 *
 * @param [in] sb    Static buffer.
 * @param [in] heap  Dynamic memory allocation hint.
 * @param [in] type  Type of dynamic memory.
 */
static void static_buffer_free(StaticBuffer* sb, void* heap, int type)
{
    (void)heap;
    (void)type;
    XFREE(sb->buffer, heap, type);
}

#else

/* Buffer and size with stack buffer set and option to dynamically allocate. */
typedef struct {
    /* Stack or heap buffer. */
    byte* buffer;
    /* Size of buffer in bytes. */
    word32 sz;
    /* Indicates whether the buffer was dynamically allocated. */
    int dyn;
} StaticBuffer;

/* Initialize static buffer.
 *
 * @param [in, out] sb           Static buffer.
 * @param [in]      stackBuffer  Buffer allocated on the stack.
 * @param [in]      len          Length of stack buffer.
 */
static void static_buffer_init(StaticBuffer* sb, byte* stackBuffer, word32 len)
{
    sb->buffer = stackBuffer;
    sb->sz = len;
    sb->dyn = 0;
}

/* Set the size of the buffer.
 *
 * Pre: Buffer on the stack set with its size.
 * Can only set size once.
 *
 * @param [in] sb    Static buffer.
 * @param [in] len   Length required.
 * @param [in] heap  Dynamic memory allocation hint.
 * @param [in] type  Type of dynamic memory.
 * @return  0 on success.
 * @return  MEMORY_E when dynamic memory allocation fails.
 */
static int static_buffer_set_size(StaticBuffer* sb, word32 len, void* heap,
    int type)
{
    int ret = 0;

    (void)heap;
    (void)type;

    if (len > sb->sz) {
        byte* buff = (byte*)XMALLOC(len, heap, type);
        if (buff == NULL) {
            ret = MEMORY_E;
        }
        else {
            sb->buffer = buff;
            sb->sz = len;
            sb->dyn = 1;
        }
    }

    return ret;
}

/* Dispose of dynamically allocated buffer.
 *
 * @param [in] sb    Static buffer.
 * @param [in] heap  Dynamic memory allocation hint.
 * @param [in] type  Type of dynamic memory.
 */
static void static_buffer_free(StaticBuffer* sb, void* heap, int type)
{
    (void)heap;
    (void)type;

    if (sb->dyn) {
        XFREE(sb->buffer, heap, type);
    }
}

#endif /* WOLFSSL_SMALL_STACK */

#ifndef NO_FILESYSTEM

/* Read all the data from a file into content.
 *
 * @param [in]      fname    File pointer to read with.
 * @param [in, out] content  Read data in an allocated buffer.
 * @param [in]      heap     Dynamic memory allocation hint.
 * @param [in]      type     Type of dynamic memory.
 * @param [out]     size     Amount of data read in bytes.
 * @return  0 on success.
 * @return  WOLFSSL_BAD_FILE when reading fails.
 * @return  MEMORY_E when memory allocation fails.
 */
static int wolfssl_read_file_static(const char* fname, StaticBuffer* content,
    void* heap, int type, long* size)
{
    int ret = 0;
    XFILE file = XBADFILE;
    long sz = 0;

    /* Check filename is usable. */
    if (fname == NULL) {
        ret = WOLFSSL_BAD_FILE;
    }
    /* Open file for reading. */
    if ((ret == 0) && ((file = XFOPEN(fname, "rb")) == XBADFILE)) {
        ret = WOLFSSL_BAD_FILE;
    }
    if (ret == 0) {
        /* Get length of file. */
        ret = wolfssl_file_len(file, &sz);
    }
    if (ret == 0) {
        /* Set the buffer to be big enough to hold all data. */
        ret = static_buffer_set_size(content, (word32)sz, heap, type);
    }
    /* Read data from file. */
    if ((ret == 0) && ((size_t)XFREAD(content->buffer, 1, (size_t)sz, file) !=
            (size_t)sz)) {
        ret = WOLFSSL_BAD_FILE;
    }

    /* Close file if opened. */
    if (file != XBADFILE) {
        XFCLOSE(file);
    }
    /* Return size read. */
    *size = sz;
    return ret;
}

#endif /* !NO_FILESYSTEM */

#endif /* !WOLFCRYPT_ONLY && !NO_CERTS */

#endif /* !WOLFSSL_SSL_MISC_INCLUDED */


Coverage Report

Created: 2025-07-23 06:59

Line	Count	Source (jump to first uncovered line)
1		/* ssl_misc.c
2		*
3		* Copyright (C) 2006-2025 wolfSSL Inc.
4		*
5		* This file is part of wolfSSL.
6		*
7		* wolfSSL is free software; you can redistribute it and/or modify
8		* it under the terms of the GNU General Public License as published by
9		* the Free Software Foundation; either version 3 of the License, or
10		* (at your option) any later version.
11		*
12		* wolfSSL is distributed in the hope that it will be useful,
13		* but WITHOUT ANY WARRANTY; without even the implied warranty of
14		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15		* GNU General Public License for more details.
16		*
17		* You should have received a copy of the GNU General Public License
18		* along with this program; if not, write to the Free Software
19		* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
20		*/
21
22		#include <wolfssl/wolfcrypt/libwolfssl_sources.h>
23
24		#if !defined(WOLFSSL_SSL_MISC_INCLUDED)
25		#ifndef WOLFSSL_IGNORE_FILE_WARN
26		#warning ssl_misc.c does not need to be compiled separately from ssl.c
27		#endif
28		#else
29
30		#if defined(OPENSSL_EXTRA) && !defined(WOLFCRYPT_ONLY)
31		#ifndef NO_BIO
32
33		/* Amount of memory to allocate/add. */
34		#define READ_BIO_FILE_CHUNK 128
35
36		/* Read a file in chunks.
37		*
38		* Allocates a chunk and reads into it until it is full.
39		*
40		* @param [in, out] bio BIO object to read with.
41		* @param [out] data Read data in a new buffer.
42		* @return Negative on error.
43		* @return Number of bytes read on success.
44		*/
45		static int wolfssl_read_bio_file(WOLFSSL_BIO* bio, char** data)
46		{
47		int ret = 0;
48		char* mem;
49		char* p;
50
51		/* Allocate buffer to hold a chunk of data. */
52		mem = (char*)XMALLOC(READ_BIO_FILE_CHUNK, NULL, DYNAMIC_TYPE_TMP_BUFFER);
53		if (mem == NULL) {
54		WOLFSSL_ERROR_MSG("Memory allocation error");
55		ret = MEMORY_E;
56		}
57
58		if (ret == 0) {
59		int sz;
60
61		/* ret is the number of bytes read and is zero. */
62
63		/* p is where to read in next chunk. */
64		p = mem;
65		/* Memory available to read into is one chunk. */
66		sz = READ_BIO_FILE_CHUNK;
67		/* Keep reading in chunks until no more or an error. */
68		while ((sz = wolfSSL_BIO_read(bio, p, sz)) > 0) {
69		int remaining;
70
71		/* Update total read. */
72		ret += sz;
73		/* Calculate remaining unused memory. */
74		remaining = READ_BIO_FILE_CHUNK - (ret % READ_BIO_FILE_CHUNK);
75		/* Check for space remaining. */
76		if (remaining != READ_BIO_FILE_CHUNK) {
77		/* Update where data is read into. */
78		p += sz;
79		/* Maximum possible size is the remaining buffer size. */
80		sz = remaining;
81		}
82		else {
83		/* No space left for more data to be read - add a chunk. */
84		p = (char*)XREALLOC(mem, ret + READ_BIO_FILE_CHUNK, NULL,
85		DYNAMIC_TYPE_TMP_BUFFER);
86		if (p == NULL) {
87		sz = MEMORY_E;
88		break;
89		}
90
91		/* Set mem to new pointer. */
92		mem = p;
93		/* Set p to where to read in next chunk. */
94		p += ret;
95		/* Read in a new chunk. */
96		sz = READ_BIO_FILE_CHUNK;
97		}
98		}
99		if ((sz < 0) \|\| (ret == 0)) {
100		/* Dispose of memory on error or no data read. */
101		XFREE(mem, NULL, DYNAMIC_TYPE_TMP_BUFFER);
102		mem = NULL;
103		/* Return error. */
104		ret = sz;
105		}
106		}
107
108		*data = mem;
109		return ret;
110		}
111
112		/* Read exactly the required amount into a newly allocated buffer.
113		*
114		* @param [in, out] bio BIO object to read with.
115		* @param [in sz Amount of data to read.
116		* @param [out] data Read data in a new buffer.
117		* @return Negative on error.
118		* @return Number of bytes read on success.
119		*/
120		static int wolfssl_read_bio_len(WOLFSSL_BIO* bio, int sz, char** data)
121		{
122		int ret = 0;
123		char* mem;
124
125		/* Allocate buffer to hold data. */
126		mem = (char*)XMALLOC((size_t)sz, NULL, DYNAMIC_TYPE_TMP_BUFFER);
127		if (mem == NULL) {
128		WOLFSSL_ERROR_MSG("Memory allocation error");
129		ret = MEMORY_E;
130		}
131		else if ((ret = wolfSSL_BIO_read(bio, mem, sz)) != sz) {
132		/* Pending data not read. */
133		XFREE(mem, NULL, DYNAMIC_TYPE_TMP_BUFFER);
134		mem = NULL;
135		ret = MEMORY_E;
136		}
137
138		*data = mem;
139		return ret;
140		}
141
142		/* Read all the data from a BIO.
143		*
144		* @param [in, out] bio BIO object to read with.
145		* @param [out] data Read data in a buffer.
146		* @param [out] dataSz Amount of data read in bytes.
147		* @param [out] memAlloced Indicates whether return buffer was allocated.
148		* @return Negative on error.
149		* @return 0 on success.
150		*/
151		static int wolfssl_read_bio(WOLFSSL_BIO* bio, char** data, int* dataSz,
152		int* memAlloced)
153		{
154		int ret;
155		int sz;
156
157		if (bio->type == WOLFSSL_BIO_MEMORY) {
158		ret = wolfSSL_BIO_get_mem_data(bio, data);
159		if (ret > 0) {
160		/* Advance the write index in the memory bio */
161		WOLFSSL_BIO* mem_bio = bio;
162		for (; mem_bio != NULL; mem_bio = mem_bio->next) {
163		if (mem_bio->type == WOLFSSL_BIO_MEMORY)
164		break;
165		}
166		if (mem_bio == NULL)
167		mem_bio = bio; /* Default to input */
168		mem_bio->rdIdx += ret;
169		}
170		*memAlloced = 0;
171		}
172		/* Get pending or, when a file BIO, get length of file. */
173		else if ((sz = wolfSSL_BIO_pending(bio)) > 0) {
174		ret = wolfssl_read_bio_len(bio, sz, data);
175		if (ret > 0) {
176		*memAlloced = 1;
177		}
178		}
179		else if (bio->type == WOLFSSL_BIO_FILE) {
180		ret = wolfssl_read_bio_file(bio, data);
181		if (ret > 0) {
182		*memAlloced = 1;
183		}
184		}
185		else {
186		WOLFSSL_ERROR_MSG("No data read from bio");
187		*memAlloced = 0;
188		ret = NOT_COMPILED_IN;
189		}
190
191		if (ret >= 0) {
192		*dataSz = ret;
193		ret = 0;
194		}
195
196		return ret;
197		}
198		#endif /* !NO_BIO */
199		#endif /* OPENSSL_EXTRA && !WOLFCRYPT_ONLY */
200
201		#if (defined(OPENSSL_EXTRA) \|\| defined(PERSIST_CERT_CACHE) \|\| \
202		!defined(NO_CERTS)) && !defined(WOLFCRYPT_ONLY) && !defined(NO_FILESYSTEM)
203		/* Read all the data from a file.
204		*
205		* @param [in] fp File pointer to read with.
206		* @param [out] fileSz Amount of data remaining in file in bytes.
207		* @return WOLFSSL_BAD_FILE on error.
208		* @return 0 on success.
209		*/
210		static int wolfssl_file_len(XFILE fp, long* fileSz)
211	40	{
212	40	int ret = 0;
213	40	long sz = 0;
214	40	long curr = 0;
215
216	40	if (fp == XBADFILE) {
217	0	ret = WOLFSSL_BAD_FILE;
218	0	}
219	40	if (ret == 0) {
220		/* Get file offset at end of file. */
221	40	curr = (long)XFTELL(fp);
222	40	if (curr < 0) {
223	0	ret = WOLFSSL_BAD_FILE;
224	0	}
225	40	}
226		/* Move to end of file. */
227	40	if ((ret == 0) && (XFSEEK(fp, 0, SEEK_END) != 0)) {
228	0	ret = WOLFSSL_BAD_FILE;
229	0	}
230	40	if (ret == 0) {
231		/* Get file offset at end of file and subtract current offset. */
232	40	sz = (long)XFTELL(fp) - curr;
233	40	if (sz < 0) {
234	0	ret = WOLFSSL_BAD_FILE;
235	0	}
236	40	}
237		/* Go back to original offset in file. */
238	40	if ((ret == 0) && (XFSEEK(fp, curr, SEEK_SET) != 0)) {
239	0	ret = WOLFSSL_BAD_FILE;
240	0	}
241		/* Validate size. */
242	40	if ((ret == 0) && ((sz > MAX_WOLFSSL_FILE_SIZE) \|\| (sz <= 0L))) {
243	0	ret = WOLFSSL_BAD_FILE;
244	0	}
245	40	if (ret == 0) {
246	40	*fileSz = sz;
247	40	}
248
249	40	return ret;
250	40	}
251		#endif
252
253		#if (defined(OPENSSL_EXTRA) \|\| defined(PERSIST_CERT_CACHE)) && \
254		!defined(WOLFCRYPT_ONLY) && !defined(NO_FILESYSTEM)
255		/* Read all the data from a file.
256		*
257		* @param [in] fp File pointer to read with.
258		* @param [out] data Read data in an allocated buffer.
259		* @param [out] dataSz Amount of data read in bytes.
260		* @return WOLFSSL_BAD_FILE when reading fails.
261		* @return MEMORY_E when memory allocation fails.
262		* @return 0 on success.
263		*/
264		static int wolfssl_read_file(XFILE fp, char** data, int* dataSz)
265		{
266		int ret = 0;
267		long sz = 0;
268		char* mem = NULL;
269
270		ret = wolfssl_file_len(fp, &sz);
271		if (ret == 0) {
272		/* Allocate memory big enough to hold whole file. */
273		mem = (char*)XMALLOC((size_t)sz, NULL, DYNAMIC_TYPE_TMP_BUFFER);
274		if (mem == NULL) {
275		ret = MEMORY_E;
276		}
277		}
278		/* Read whole file into new buffer. */
279		if ((ret == 0) && ((int)XFREAD(mem, 1, (size_t)sz, fp) != sz)) {
280		ret = WOLFSSL_BAD_FILE;
281		}
282		if (ret == 0) {
283		*dataSz = (int)sz;
284		*data = mem;
285		mem = NULL;
286		}
287
288		XFREE(mem, NULL, DYNAMIC_TYPE_TMP_BUFFER);
289		return ret;
290		}
291		#endif /* (OPENSSL_EXTRA \|\| PERSIST_CERT_CACHE) && !WOLFCRYPT_ONLY &&
292		* !NO_FILESYSTEM */
293
294		#if !defined(WOLFCRYPT_ONLY) && !defined(NO_CERTS)
295
296		#ifdef WOLFSSL_SMALL_STACK
297
298		/* Buffer and size with no stack buffer. */
299		typedef struct {
300		/* Dynamically allocated buffer. */
301		byte* buffer;
302		/* Size of buffer in bytes. */
303		word32 sz;
304		} StaticBuffer;
305
306		/* Initialize static buffer.
307		*
308		* @param [in, out] sb Static buffer.
309		*/
310		static void static_buffer_init(StaticBuffer* sb)
311	40	{
312	40	sb->buffer = NULL;
313	40	sb->sz = 0;
314	40	}
315
316		/* Set the size of the buffer.
317		*
318		* Can only set size once.
319		*
320		* @param [in] sb Static buffer.
321		* @param [in] len Length required.
322		* @param [in] heap Dynamic memory allocation hint.
323		* @param [in] type Type of dynamic memory.
324		* @return 0 on success.
325		* @return MEMORY_E when dynamic memory allocation fails.
326		*/
327		static int static_buffer_set_size(StaticBuffer* sb, word32 len, void* heap,
328		int type)
329	40	{
330	40	int ret = 0;
331
332	40	(void)heap;
333	40	(void)type;
334
335	40	sb->buffer = (byte*)XMALLOC(len, heap, type);
336	40	if (sb->buffer == NULL) {
337	0	ret = MEMORY_E;
338	0	}
339	40	else {
340	40	sb->sz = len;
341	40	}
342
343	40	return ret;
344	40	}
345
346		/* Dispose of dynamically allocated buffer.
347		*
348		* @param [in] sb Static buffer.
349		* @param [in] heap Dynamic memory allocation hint.
350		* @param [in] type Type of dynamic memory.
351		*/
352		static void static_buffer_free(StaticBuffer* sb, void* heap, int type)
353	40	{
354	40	(void)heap;
355	40	(void)type;
356	40	XFREE(sb->buffer, heap, type);
357	40	}
358
359		#else
360
361		/* Buffer and size with stack buffer set and option to dynamically allocate. */
362		typedef struct {
363		/* Stack or heap buffer. */
364		byte* buffer;
365		/* Size of buffer in bytes. */
366		word32 sz;
367		/* Indicates whether the buffer was dynamically allocated. */
368		int dyn;
369		} StaticBuffer;
370
371		/* Initialize static buffer.
372		*
373		* @param [in, out] sb Static buffer.
374		* @param [in] stackBuffer Buffer allocated on the stack.
375		* @param [in] len Length of stack buffer.
376		*/
377		static void static_buffer_init(StaticBuffer* sb, byte* stackBuffer, word32 len)
378		{
379		sb->buffer = stackBuffer;
380		sb->sz = len;
381		sb->dyn = 0;
382		}
383
384		/* Set the size of the buffer.
385		*
386		* Pre: Buffer on the stack set with its size.
387		* Can only set size once.
388		*
389		* @param [in] sb Static buffer.
390		* @param [in] len Length required.
391		* @param [in] heap Dynamic memory allocation hint.
392		* @param [in] type Type of dynamic memory.
393		* @return 0 on success.
394		* @return MEMORY_E when dynamic memory allocation fails.
395		*/
396		static int static_buffer_set_size(StaticBuffer* sb, word32 len, void* heap,
397		int type)
398		{
399		int ret = 0;
400
401		(void)heap;
402		(void)type;
403
404		if (len > sb->sz) {
405		byte* buff = (byte*)XMALLOC(len, heap, type);
406		if (buff == NULL) {
407		ret = MEMORY_E;
408		}
409		else {
410		sb->buffer = buff;
411		sb->sz = len;
412		sb->dyn = 1;
413		}
414		}
415
416		return ret;
417		}
418
419		/* Dispose of dynamically allocated buffer.
420		*
421		* @param [in] sb Static buffer.
422		* @param [in] heap Dynamic memory allocation hint.
423		* @param [in] type Type of dynamic memory.
424		*/
425		static void static_buffer_free(StaticBuffer* sb, void* heap, int type)
426		{
427		(void)heap;
428		(void)type;
429
430		if (sb->dyn) {
431		XFREE(sb->buffer, heap, type);
432		}
433		}
434
435		#endif /* WOLFSSL_SMALL_STACK */
436
437		#ifndef NO_FILESYSTEM
438
439		/* Read all the data from a file into content.
440		*
441		* @param [in] fname File pointer to read with.
442		* @param [in, out] content Read data in an allocated buffer.
443		* @param [in] heap Dynamic memory allocation hint.
444		* @param [in] type Type of dynamic memory.
445		* @param [out] size Amount of data read in bytes.
446		* @return 0 on success.
447		* @return WOLFSSL_BAD_FILE when reading fails.
448		* @return MEMORY_E when memory allocation fails.
449		*/
450		static int wolfssl_read_file_static(const char* fname, StaticBuffer* content,
451		void* heap, int type, long* size)
452	40	{
453	40	int ret = 0;
454	40	XFILE file = XBADFILE;
455	40	long sz = 0;
456
457		/* Check filename is usable. */
458	40	if (fname == NULL) {
459	0	ret = WOLFSSL_BAD_FILE;
460	0	}
461		/* Open file for reading. */
462	40	if ((ret == 0) && ((file = XFOPEN(fname, "rb")) == XBADFILE)) {
463	0	ret = WOLFSSL_BAD_FILE;
464	0	}
465	40	if (ret == 0) {
466		/* Get length of file. */
467	40	ret = wolfssl_file_len(file, &sz);
468	40	}
469	40	if (ret == 0) {
470		/* Set the buffer to be big enough to hold all data. */
471	40	ret = static_buffer_set_size(content, (word32)sz, heap, type);
472	40	}
473		/* Read data from file. */
474	40	if ((ret == 0) && ((size_t)XFREAD(content->buffer, 1, (size_t)sz, file) !=
475	40	(size_t)sz)) {
476	0	ret = WOLFSSL_BAD_FILE;
477	0	}
478
479		/* Close file if opened. */
480	40	if (file != XBADFILE) {
481	40	XFCLOSE(file);
482	40	}
483		/* Return size read. */
484	40	*size = sz;
485	40	return ret;
486	40	}
487
488		#endif /* !NO_FILESYSTEM */
489
490		#endif /* !WOLFCRYPT_ONLY && !NO_CERTS */
491
492		#endif /* !WOLFSSL_SSL_MISC_INCLUDED */
493