[efi-boot-shim.git] / Cryptlib / OpenSSL / crypto / bio / bss_mem.c

/* crypto/bio/bss_mem.c */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 *
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 *
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 *
 * 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 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 acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 *
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS 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 AUTHOR OR 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.
 *
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */

#include <stdio.h>
#include <errno.h>
#include "cryptlib.h"
#include <openssl/bio.h>

static int mem_write(BIO *h, const char *buf, int num);
static int mem_read(BIO *h, char *buf, int size);
static int mem_puts(BIO *h, const char *str);
static int mem_gets(BIO *h, char *str, int size);
static long mem_ctrl(BIO *h, int cmd, long arg1, void *arg2);
static int mem_new(BIO *h);
static int mem_free(BIO *data);
static BIO_METHOD mem_method = {
    BIO_TYPE_MEM,
    "memory buffer",
    mem_write,
    mem_read,
    mem_puts,
    mem_gets,
    mem_ctrl,
    mem_new,
    mem_free,
    NULL,
};

/*
 * bio->num is used to hold the value to return on 'empty', if it is 0,
 * should_retry is not set
 */

BIO_METHOD *BIO_s_mem(void)
{
    return (&mem_method);
}


BIO *BIO_new_mem_buf(const void *buf, int len)
{
    BIO *ret;
    BUF_MEM *b;
    size_t sz;

    if (!buf) {
        BIOerr(BIO_F_BIO_NEW_MEM_BUF, BIO_R_NULL_PARAMETER);
        return NULL;
    }
    sz = (len < 0) ? strlen(buf) : (size_t)len;
    if (!(ret = BIO_new(BIO_s_mem())))
        return NULL;
    b = (BUF_MEM *)ret->ptr;
    /* Cast away const and trust in the MEM_RDONLY flag. */
    b->data = (void *)buf;
    b->length = sz;
    b->max = sz;
    ret->flags |= BIO_FLAGS_MEM_RDONLY;
    /* Since this is static data retrying wont help */
    ret->num = 0;
    return ret;
}

static int mem_new(BIO *bi)
{
    BUF_MEM *b;

    if ((b = BUF_MEM_new()) == NULL)
        return (0);
    bi->shutdown = 1;
    bi->init = 1;
    bi->num = -1;
    bi->ptr = (char *)b;
    return (1);
}

static int mem_free(BIO *a)
{
    if (a == NULL)
        return (0);
    if (a->shutdown) {
        if ((a->init) && (a->ptr != NULL)) {
            BUF_MEM *b;
            b = (BUF_MEM *)a->ptr;
            if (a->flags & BIO_FLAGS_MEM_RDONLY)
                b->data = NULL;
            BUF_MEM_free(b);
            a->ptr = NULL;
        }
    }
    return (1);
}

static int mem_read(BIO *b, char *out, int outl)
{
    int ret = -1;
    BUF_MEM *bm;

    bm = (BUF_MEM *)b->ptr;
    BIO_clear_retry_flags(b);
    ret = (outl >= 0 && (size_t)outl > bm->length) ? (int)bm->length : outl;
    if ((out != NULL) && (ret > 0)) {
        memcpy(out, bm->data, ret);
        bm->length -= ret;
        if (b->flags & BIO_FLAGS_MEM_RDONLY)
            bm->data += ret;
        else {
            memmove(&(bm->data[0]), &(bm->data[ret]), bm->length);
        }
    } else if (bm->length == 0) {
        ret = b->num;
        if (ret != 0)
            BIO_set_retry_read(b);
    }
    return (ret);
}

static int mem_write(BIO *b, const char *in, int inl)
{
    int ret = -1;
    int blen;
    BUF_MEM *bm;

    bm = (BUF_MEM *)b->ptr;
    if (in == NULL) {
        BIOerr(BIO_F_MEM_WRITE, BIO_R_NULL_PARAMETER);
        goto end;
    }

    if (b->flags & BIO_FLAGS_MEM_RDONLY) {
        BIOerr(BIO_F_MEM_WRITE, BIO_R_WRITE_TO_READ_ONLY_BIO);
        goto end;
    }

    BIO_clear_retry_flags(b);
    blen = bm->length;
    if (BUF_MEM_grow_clean(bm, blen + inl) != (blen + inl))
        goto end;
    memcpy(&(bm->data[blen]), in, inl);
    ret = inl;
 end:
    return (ret);
}

static long mem_ctrl(BIO *b, int cmd, long num, void *ptr)
{
    long ret = 1;
    char **pptr;

    BUF_MEM *bm = (BUF_MEM *)b->ptr;

    switch (cmd) {
    case BIO_CTRL_RESET:
        if (bm->data != NULL) {
            /* For read only case reset to the start again */
            if (b->flags & BIO_FLAGS_MEM_RDONLY) {
                bm->data -= bm->max - bm->length;
                bm->length = bm->max;
            } else {
                memset(bm->data, 0, bm->max);
                bm->length = 0;
            }
        }
        break;
    case BIO_CTRL_EOF:
        ret = (long)(bm->length == 0);
        break;
    case BIO_C_SET_BUF_MEM_EOF_RETURN:
        b->num = (int)num;
        break;
    case BIO_CTRL_INFO:
        ret = (long)bm->length;
        if (ptr != NULL) {
            pptr = (char **)ptr;
            *pptr = (char *)&(bm->data[0]);
        }
        break;
    case BIO_C_SET_BUF_MEM:
        mem_free(b);
        b->shutdown = (int)num;
        b->ptr = ptr;
        break;
    case BIO_C_GET_BUF_MEM_PTR:
        if (ptr != NULL) {
            pptr = (char **)ptr;
            *pptr = (char *)bm;
        }
        break;
    case BIO_CTRL_GET_CLOSE:
        ret = (long)b->shutdown;
        break;
    case BIO_CTRL_SET_CLOSE:
        b->shutdown = (int)num;
        break;

    case BIO_CTRL_WPENDING:
        ret = 0L;
        break;
    case BIO_CTRL_PENDING:
        ret = (long)bm->length;
        break;
    case BIO_CTRL_DUP:
    case BIO_CTRL_FLUSH:
        ret = 1;
        break;
    case BIO_CTRL_PUSH:
    case BIO_CTRL_POP:
    default:
        ret = 0;
        break;
    }
    return (ret);
}

static int mem_gets(BIO *bp, char *buf, int size)
{
    int i, j;
    int ret = -1;
    char *p;
    BUF_MEM *bm = (BUF_MEM *)bp->ptr;

    BIO_clear_retry_flags(bp);
    j = bm->length;
    if ((size - 1) < j)
        j = size - 1;
    if (j <= 0) {
        *buf = '\0';
        return 0;
    }
    p = bm->data;
    for (i = 0; i < j; i++) {
        if (p[i] == '\n') {
            i++;
            break;
        }
    }

    /*
     * i is now the max num of bytes to copy, either j or up to
     * and including the first newline
     */

    i = mem_read(bp, buf, i);
    if (i > 0)
        buf[i] = '\0';
    ret = i;
    return (ret);
}

static int mem_puts(BIO *bp, const char *str)
{
    int n, ret;

    n = strlen(str);
    ret = mem_write(bp, str, n);
    /* memory semantics is that it will always work */
    return (ret);
}
Commit	Line	Data
3e575651 SL	1	/* crypto/bio/bss_mem.c */
	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.
d3819813	8	*
3e575651 SL	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).
d3819813	15	*
3e575651 SL	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.
d3819813	22	*
3e575651 SL	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 :-).
d3819813	37	* 4. If you include any Windows specific code (or a derivative thereof) from
3e575651 SL	38	* the apps directory (application code) you must include an acknowledgement:
3e575651 SL	39	* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
d3819813	40	*
3e575651 SL	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.
d3819813	52	*
3e575651 SL	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 <errno.h>
	61	#include "cryptlib.h"
	62	#include <openssl/bio.h>
	63
	64	static int mem_write(BIO h, const char buf, int num);
	65	static int mem_read(BIO h, char buf, int size);
	66	static int mem_puts(BIO h, const char str);
	67	static int mem_gets(BIO h, char str, int size);
	68	static long mem_ctrl(BIO h, int cmd, long arg1, void arg2);
	69	static int mem_new(BIO *h);
	70	static int mem_free(BIO *data);
d3819813 MTL	71	static BIO_METHOD mem_method = {
	72	BIO_TYPE_MEM,
	73	"memory buffer",
	74	mem_write,
	75	mem_read,
	76	mem_puts,
	77	mem_gets,
	78	mem_ctrl,
	79	mem_new,
	80	mem_free,
	81	NULL,
	82	};
3e575651	83
d3819813 MTL	84	/*
	85	* bio->num is used to hold the value to return on 'empty', if it is 0,
	86	* should_retry is not set
	87	*/
3e575651 SL	88
3e575651 SL	89	BIO_METHOD *BIO_s_mem(void)
d3819813 MTL	90	{
	91	return (&mem_method);
	92	}
3e575651	93
62f0afa2 MTL	94
62f0afa2 MTL	95	BIO BIO_new_mem_buf(const void buf, int len)
3e575651	96	{
d3819813 MTL	97	BIO *ret;
	98	BUF_MEM *b;
	99	size_t sz;
	100
	101	if (!buf) {
	102	BIOerr(BIO_F_BIO_NEW_MEM_BUF, BIO_R_NULL_PARAMETER);
	103	return NULL;
	104	}
	105	sz = (len < 0) ? strlen(buf) : (size_t)len;
	106	if (!(ret = BIO_new(BIO_s_mem())))
	107	return NULL;
	108	b = (BUF_MEM *)ret->ptr;
62f0afa2 MTL	109	/* Cast away const and trust in the MEM_RDONLY flag. */
62f0afa2 MTL	110	b->data = (void *)buf;
d3819813 MTL	111	b->length = sz;
	112	b->max = sz;
	113	ret->flags \|= BIO_FLAGS_MEM_RDONLY;
	114	/* Since this is static data retrying wont help */
	115	ret->num = 0;
	116	return ret;
3e575651 SL	117	}
	118
	119	static int mem_new(BIO *bi)
d3819813 MTL	120	{
d3819813 MTL	121	BUF_MEM *b;
3e575651	122
d3819813 MTL	123	if ((b = BUF_MEM_new()) == NULL)
	124	return (0);
	125	bi->shutdown = 1;
	126	bi->init = 1;
	127	bi->num = -1;
	128	bi->ptr = (char *)b;
	129	return (1);
	130	}
3e575651 SL	131
3e575651 SL	132	static int mem_free(BIO *a)
d3819813 MTL	133	{
	134	if (a == NULL)
	135	return (0);
	136	if (a->shutdown) {
	137	if ((a->init) && (a->ptr != NULL)) {
	138	BUF_MEM *b;
	139	b = (BUF_MEM *)a->ptr;
	140	if (a->flags & BIO_FLAGS_MEM_RDONLY)
	141	b->data = NULL;
	142	BUF_MEM_free(b);
	143	a->ptr = NULL;
	144	}
	145	}
	146	return (1);
	147	}
	148
3e575651	149	static int mem_read(BIO b, char out, int outl)
d3819813 MTL	150	{
	151	int ret = -1;
	152	BUF_MEM *bm;
3e575651	153
d3819813 MTL	154	bm = (BUF_MEM *)b->ptr;
	155	BIO_clear_retry_flags(b);
	156	ret = (outl >= 0 && (size_t)outl > bm->length) ? (int)bm->length : outl;
	157	if ((out != NULL) && (ret > 0)) {
	158	memcpy(out, bm->data, ret);
	159	bm->length -= ret;
	160	if (b->flags & BIO_FLAGS_MEM_RDONLY)
	161	bm->data += ret;
	162	else {
	163	memmove(&(bm->data[0]), &(bm->data[ret]), bm->length);
	164	}
	165	} else if (bm->length == 0) {
	166	ret = b->num;
	167	if (ret != 0)
	168	BIO_set_retry_read(b);
	169	}
	170	return (ret);
	171	}
3e575651 SL	172
3e575651 SL	173	static int mem_write(BIO b, const char in, int inl)
d3819813 MTL	174	{
	175	int ret = -1;
	176	int blen;
	177	BUF_MEM *bm;
3e575651	178
d3819813 MTL	179	bm = (BUF_MEM *)b->ptr;
	180	if (in == NULL) {
	181	BIOerr(BIO_F_MEM_WRITE, BIO_R_NULL_PARAMETER);
	182	goto end;
	183	}
3e575651	184
d3819813 MTL	185	if (b->flags & BIO_FLAGS_MEM_RDONLY) {
	186	BIOerr(BIO_F_MEM_WRITE, BIO_R_WRITE_TO_READ_ONLY_BIO);
	187	goto end;
	188	}
3e575651	189
d3819813 MTL	190	BIO_clear_retry_flags(b);
	191	blen = bm->length;
	192	if (BUF_MEM_grow_clean(bm, blen + inl) != (blen + inl))
	193	goto end;
	194	memcpy(&(bm->data[blen]), in, inl);
	195	ret = inl;
	196	end:
	197	return (ret);
	198	}
3e575651 SL	199
3e575651 SL	200	static long mem_ctrl(BIO b, int cmd, long num, void ptr)
d3819813 MTL	201	{
	202	long ret = 1;
	203	char **pptr;
3e575651	204
d3819813	205	BUF_MEM bm = (BUF_MEM )b->ptr;
3e575651	206
d3819813 MTL	207	switch (cmd) {
	208	case BIO_CTRL_RESET:
	209	if (bm->data != NULL) {
	210	/* For read only case reset to the start again */
	211	if (b->flags & BIO_FLAGS_MEM_RDONLY) {
	212	bm->data -= bm->max - bm->length;
	213	bm->length = bm->max;
	214	} else {
	215	memset(bm->data, 0, bm->max);
	216	bm->length = 0;
	217	}
	218	}
	219	break;
	220	case BIO_CTRL_EOF:
	221	ret = (long)(bm->length == 0);
	222	break;
	223	case BIO_C_SET_BUF_MEM_EOF_RETURN:
	224	b->num = (int)num;
	225	break;
	226	case BIO_CTRL_INFO:
	227	ret = (long)bm->length;
	228	if (ptr != NULL) {
	229	pptr = (char **)ptr;
	230	pptr = (char )&(bm->data[0]);
	231	}
	232	break;
	233	case BIO_C_SET_BUF_MEM:
	234	mem_free(b);
	235	b->shutdown = (int)num;
	236	b->ptr = ptr;
	237	break;
	238	case BIO_C_GET_BUF_MEM_PTR:
	239	if (ptr != NULL) {
	240	pptr = (char **)ptr;
	241	pptr = (char )bm;
	242	}
	243	break;
	244	case BIO_CTRL_GET_CLOSE:
	245	ret = (long)b->shutdown;
	246	break;
	247	case BIO_CTRL_SET_CLOSE:
	248	b->shutdown = (int)num;
	249	break;
3e575651	250
d3819813 MTL	251	case BIO_CTRL_WPENDING:
	252	ret = 0L;
	253	break;
	254	case BIO_CTRL_PENDING:
	255	ret = (long)bm->length;
	256	break;
	257	case BIO_CTRL_DUP:
	258	case BIO_CTRL_FLUSH:
	259	ret = 1;
	260	break;
	261	case BIO_CTRL_PUSH:
	262	case BIO_CTRL_POP:
	263	default:
	264	ret = 0;
	265	break;
	266	}
	267	return (ret);
	268	}
3e575651 SL	269
3e575651 SL	270	static int mem_gets(BIO bp, char buf, int size)
d3819813 MTL	271	{
	272	int i, j;
	273	int ret = -1;
	274	char *p;
	275	BUF_MEM bm = (BUF_MEM )bp->ptr;
3e575651	276
d3819813 MTL	277	BIO_clear_retry_flags(bp);
	278	j = bm->length;
	279	if ((size - 1) < j)
	280	j = size - 1;
	281	if (j <= 0) {
	282	*buf = '\0';
	283	return 0;
	284	}
	285	p = bm->data;
	286	for (i = 0; i < j; i++) {
	287	if (p[i] == '\n') {
	288	i++;
	289	break;
	290	}
	291	}
3e575651	292
d3819813 MTL	293	/*
	294	* i is now the max num of bytes to copy, either j or up to
	295	* and including the first newline
	296	*/
3e575651	297
d3819813 MTL	298	i = mem_read(bp, buf, i);
	299	if (i > 0)
	300	buf[i] = '\0';
	301	ret = i;
	302	return (ret);
	303	}
3e575651 SL	304
3e575651 SL	305	static int mem_puts(BIO bp, const char str)
d3819813 MTL	306	{
d3819813 MTL	307	int n, ret;
3e575651	308
d3819813 MTL	309	n = strlen(str);
	310	ret = mem_write(bp, str, n);
	311	/* memory semantics is that it will always work */
	312	return (ret);
	313	}