[efi-boot-shim.git] / Cryptlib / OpenSSL / crypto / asn1 / a_d2i_fp.c

/* crypto/asn1/a_d2i_fp.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 <limits.h>
#include "cryptlib.h"
#include <openssl/buffer.h>
#include <openssl/asn1_mac.h>

static int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb);

#ifndef NO_OLD_ASN1
# ifndef OPENSSL_NO_FP_API

void *ASN1_d2i_fp(void *(*xnew) (void), d2i_of_void *d2i, FILE *in, void **x)
{
    BIO *b;
    void *ret;

    if ((b = BIO_new(BIO_s_file())) == NULL) {
        ASN1err(ASN1_F_ASN1_D2I_FP, ERR_R_BUF_LIB);
        return (NULL);
    }
    BIO_set_fp(b, in, BIO_NOCLOSE);
    ret = ASN1_d2i_bio(xnew, d2i, b, x);
    BIO_free(b);
    return (ret);
}
# endif

void *ASN1_d2i_bio(void *(*xnew) (void), d2i_of_void *d2i, BIO *in, void **x)
{
    BUF_MEM *b = NULL;
    const unsigned char *p;
    void *ret = NULL;
    int len;

    len = asn1_d2i_read_bio(in, &b);
    if (len < 0)
        goto err;

    p = (unsigned char *)b->data;
    ret = d2i(x, &p, len);
 err:
    if (b != NULL)
        BUF_MEM_free(b);
    return (ret);
}

#endif

void *ASN1_item_d2i_bio(const ASN1_ITEM *it, BIO *in, void *x)
{
    BUF_MEM *b = NULL;
    const unsigned char *p;
    void *ret = NULL;
    int len;

    len = asn1_d2i_read_bio(in, &b);
    if (len < 0)
        goto err;

    p = (const unsigned char *)b->data;
    ret = ASN1_item_d2i(x, &p, len, it);
 err:
    if (b != NULL)
        BUF_MEM_free(b);
    return (ret);
}

#ifndef OPENSSL_NO_FP_API
void *ASN1_item_d2i_fp(const ASN1_ITEM *it, FILE *in, void *x)
{
    BIO *b;
    char *ret;

    if ((b = BIO_new(BIO_s_file())) == NULL) {
        ASN1err(ASN1_F_ASN1_ITEM_D2I_FP, ERR_R_BUF_LIB);
        return (NULL);
    }
    BIO_set_fp(b, in, BIO_NOCLOSE);
    ret = ASN1_item_d2i_bio(it, b, x);
    BIO_free(b);
    return (ret);
}
#endif

#define HEADER_SIZE   8
#define ASN1_CHUNK_INITIAL_SIZE (16 * 1024)
static int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb)
{
    BUF_MEM *b;
    unsigned char *p;
    int i;
    ASN1_const_CTX c;
    size_t want = HEADER_SIZE;
    int eos = 0;
    size_t off = 0;
    size_t len = 0;

    b = BUF_MEM_new();
    if (b == NULL) {
        ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ERR_R_MALLOC_FAILURE);
        return -1;
    }

    ERR_clear_error();
    for (;;) {
        if (want >= (len - off)) {
            want -= (len - off);

            if (len + want < len || !BUF_MEM_grow_clean(b, len + want)) {
                ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ERR_R_MALLOC_FAILURE);
                goto err;
            }
            i = BIO_read(in, &(b->data[len]), want);
            if ((i < 0) && ((len - off) == 0)) {
                ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ASN1_R_NOT_ENOUGH_DATA);
                goto err;
            }
            if (i > 0) {
                if (len + i < len) {
                    ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ASN1_R_TOO_LONG);
                    goto err;
                }
                len += i;
            }
        }
        /* else data already loaded */

        p = (unsigned char *)&(b->data[off]);
        c.p = p;
        c.inf = ASN1_get_object(&(c.p), &(c.slen), &(c.tag), &(c.xclass),
                                len - off);
        if (c.inf & 0x80) {
            unsigned long e;

            e = ERR_GET_REASON(ERR_peek_error());
            if (e != ASN1_R_TOO_LONG)
                goto err;
            else
                ERR_clear_error(); /* clear error */
        }
        i = c.p - p;            /* header length */
        off += i;               /* end of data */

        if (c.inf & 1) {
            /* no data body so go round again */
            eos++;
            if (eos < 0) {
                ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ASN1_R_HEADER_TOO_LONG);
                goto err;
            }
            want = HEADER_SIZE;
        } else if (eos && (c.slen == 0) && (c.tag == V_ASN1_EOC)) {
            /* eos value, so go back and read another header */
            eos--;
            if (eos <= 0)
                break;
            else
                want = HEADER_SIZE;
        } else {
            /* suck in c.slen bytes of data */
            want = c.slen;
            if (want > (len - off)) {
                size_t chunk_max = ASN1_CHUNK_INITIAL_SIZE;

                want -= (len - off);
                if (want > INT_MAX /* BIO_read takes an int length */  ||
                    len + want < len) {
                    ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ASN1_R_TOO_LONG);
                    goto err;
                }
                while (want > 0) {
                    /*
                     * Read content in chunks of increasing size
                     * so we can return an error for EOF without
                     * having to allocate the entire content length
                     * in one go.
                     */
                    size_t chunk = want > chunk_max ? chunk_max : want;

                    if (!BUF_MEM_grow_clean(b, len + chunk)) {
                        ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ERR_R_MALLOC_FAILURE);
                        goto err;
                    }
                    want -= chunk;
                    while (chunk > 0) {
                        i = BIO_read(in, &(b->data[len]), chunk);
                        if (i <= 0) {
                            ASN1err(ASN1_F_ASN1_D2I_READ_BIO,
                                    ASN1_R_NOT_ENOUGH_DATA);
                            goto err;
                        }
                    /*
                     * This can't overflow because |len+want| didn't
                     * overflow.
                     */
                        len += i;
                        chunk -= i;
                    }
                    if (chunk_max < INT_MAX/2)
                        chunk_max *= 2;
                }
            }
            if (off + c.slen < off) {
                ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ASN1_R_TOO_LONG);
                goto err;
            }
            off += c.slen;
            if (eos <= 0) {
                break;
            } else
                want = HEADER_SIZE;
        }
    }

    if (off > INT_MAX) {
        ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ASN1_R_TOO_LONG);
        goto err;
    }

    *pb = b;
    return off;
 err:
    if (b != NULL)
        BUF_MEM_free(b);
    return -1;
}
Commit	Line	Data
3e575651 SL	1	/* crypto/asn1/a_d2i_fp.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 <limits.h>
	61	#include "cryptlib.h"
	62	#include <openssl/buffer.h>
	63	#include <openssl/asn1_mac.h>
	64
	65	static int asn1_d2i_read_bio(BIO in, BUF_MEM *pb);
	66
	67	#ifndef NO_OLD_ASN1
d3819813	68	# ifndef OPENSSL_NO_FP_API
3e575651	69
d3819813 MTL	70	void ASN1_d2i_fp(void (xnew) (void), d2i_of_void d2i, FILE in, void *x)
	71	{
	72	BIO *b;
	73	void *ret;
3e575651	74
d3819813 MTL	75	if ((b = BIO_new(BIO_s_file())) == NULL) {
	76	ASN1err(ASN1_F_ASN1_D2I_FP, ERR_R_BUF_LIB);
	77	return (NULL);
	78	}
	79	BIO_set_fp(b, in, BIO_NOCLOSE);
	80	ret = ASN1_d2i_bio(xnew, d2i, b, x);
	81	BIO_free(b);
	82	return (ret);
	83	}
	84	# endif
3e575651	85
d3819813 MTL	86	void ASN1_d2i_bio(void (xnew) (void), d2i_of_void d2i, BIO in, void *x)
	87	{
	88	BUF_MEM *b = NULL;
	89	const unsigned char *p;
	90	void *ret = NULL;
	91	int len;
3e575651	92
d3819813 MTL	93	len = asn1_d2i_read_bio(in, &b);
	94	if (len < 0)
	95	goto err;
3e575651	96
d3819813 MTL	97	p = (unsigned char *)b->data;
	98	ret = d2i(x, &p, len);
	99	err:
	100	if (b != NULL)
	101	BUF_MEM_free(b);
	102	return (ret);
	103	}
3e575651 SL	104
	105	#endif
	106
	107	void ASN1_item_d2i_bio(const ASN1_ITEM it, BIO in, void x)
d3819813 MTL	108	{
	109	BUF_MEM *b = NULL;
	110	const unsigned char *p;
	111	void *ret = NULL;
	112	int len;
3e575651	113
d3819813 MTL	114	len = asn1_d2i_read_bio(in, &b);
	115	if (len < 0)
	116	goto err;
3e575651	117
d3819813 MTL	118	p = (const unsigned char *)b->data;
	119	ret = ASN1_item_d2i(x, &p, len, it);
	120	err:
	121	if (b != NULL)
	122	BUF_MEM_free(b);
	123	return (ret);
	124	}
3e575651 SL	125
	126	#ifndef OPENSSL_NO_FP_API
	127	void ASN1_item_d2i_fp(const ASN1_ITEM it, FILE in, void x)
d3819813 MTL	128	{
	129	BIO *b;
	130	char *ret;
3e575651	131
d3819813 MTL	132	if ((b = BIO_new(BIO_s_file())) == NULL) {
	133	ASN1err(ASN1_F_ASN1_ITEM_D2I_FP, ERR_R_BUF_LIB);
	134	return (NULL);
	135	}
	136	BIO_set_fp(b, in, BIO_NOCLOSE);
	137	ret = ASN1_item_d2i_bio(it, b, x);
	138	BIO_free(b);
	139	return (ret);
	140	}
3e575651 SL	141	#endif
	142
	143	#define HEADER_SIZE 8
62f0afa2	144	#define ASN1_CHUNK_INITIAL_SIZE (16 * 1024)
3e575651	145	static int asn1_d2i_read_bio(BIO in, BUF_MEM *pb)
d3819813 MTL	146	{
	147	BUF_MEM *b;
	148	unsigned char *p;
	149	int i;
	150	ASN1_const_CTX c;
	151	size_t want = HEADER_SIZE;
	152	int eos = 0;
	153	size_t off = 0;
	154	size_t len = 0;
3e575651	155
d3819813 MTL	156	b = BUF_MEM_new();
	157	if (b == NULL) {
	158	ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ERR_R_MALLOC_FAILURE);
	159	return -1;
	160	}
3e575651	161
d3819813 MTL	162	ERR_clear_error();
	163	for (;;) {
	164	if (want >= (len - off)) {
	165	want -= (len - off);
3e575651	166
d3819813 MTL	167	if (len + want < len \|\| !BUF_MEM_grow_clean(b, len + want)) {
	168	ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ERR_R_MALLOC_FAILURE);
	169	goto err;
	170	}
	171	i = BIO_read(in, &(b->data[len]), want);
	172	if ((i < 0) && ((len - off) == 0)) {
	173	ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ASN1_R_NOT_ENOUGH_DATA);
	174	goto err;
	175	}
	176	if (i > 0) {
	177	if (len + i < len) {
	178	ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ASN1_R_TOO_LONG);
	179	goto err;
	180	}
	181	len += i;
	182	}
	183	}
	184	/* else data already loaded */
3e575651	185
d3819813 MTL	186	p = (unsigned char *)&(b->data[off]);
	187	c.p = p;
	188	c.inf = ASN1_get_object(&(c.p), &(c.slen), &(c.tag), &(c.xclass),
	189	len - off);
	190	if (c.inf & 0x80) {
	191	unsigned long e;
3e575651	192
d3819813 MTL	193	e = ERR_GET_REASON(ERR_peek_error());
	194	if (e != ASN1_R_TOO_LONG)
	195	goto err;
	196	else
	197	ERR_clear_error(); /* clear error */
	198	}
	199	i = c.p - p; /* header length */
	200	off += i; /* end of data */
3e575651	201
d3819813 MTL	202	if (c.inf & 1) {
	203	/* no data body so go round again */
	204	eos++;
	205	if (eos < 0) {
	206	ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ASN1_R_HEADER_TOO_LONG);
	207	goto err;
	208	}
	209	want = HEADER_SIZE;
	210	} else if (eos && (c.slen == 0) && (c.tag == V_ASN1_EOC)) {
	211	/* eos value, so go back and read another header */
	212	eos--;
	213	if (eos <= 0)
	214	break;
	215	else
	216	want = HEADER_SIZE;
	217	} else {
	218	/* suck in c.slen bytes of data */
	219	want = c.slen;
	220	if (want > (len - off)) {
62f0afa2 MTL	221	size_t chunk_max = ASN1_CHUNK_INITIAL_SIZE;
62f0afa2 MTL	222
d3819813 MTL	223	want -= (len - off);
	224	if (want > INT_MAX /* BIO_read takes an int length */ \|\|
	225	len + want < len) {
	226	ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ASN1_R_TOO_LONG);
	227	goto err;
	228	}
d3819813	229	while (want > 0) {
62f0afa2 MTL	230	/*
	231	* Read content in chunks of increasing size
	232	* so we can return an error for EOF without
	233	* having to allocate the entire content length
	234	* in one go.
	235	*/
	236	size_t chunk = want > chunk_max ? chunk_max : want;
	237
	238	if (!BUF_MEM_grow_clean(b, len + chunk)) {
	239	ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ERR_R_MALLOC_FAILURE);
d3819813 MTL	240	goto err;
d3819813 MTL	241	}
62f0afa2 MTL	242	want -= chunk;
	243	while (chunk > 0) {
	244	i = BIO_read(in, &(b->data[len]), chunk);
	245	if (i <= 0) {
	246	ASN1err(ASN1_F_ASN1_D2I_READ_BIO,
	247	ASN1_R_NOT_ENOUGH_DATA);
	248	goto err;
	249	}
d3819813 MTL	250	/*
	251	* This can't overflow because \|len+want\| didn't
	252	* overflow.
	253	*/
62f0afa2 MTL	254	len += i;
	255	chunk -= i;
	256	}
	257	if (chunk_max < INT_MAX/2)
	258	chunk_max *= 2;
d3819813 MTL	259	}
	260	}
	261	if (off + c.slen < off) {
	262	ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ASN1_R_TOO_LONG);
	263	goto err;
	264	}
	265	off += c.slen;
	266	if (eos <= 0) {
	267	break;
	268	} else
	269	want = HEADER_SIZE;
	270	}
	271	}
3e575651	272
d3819813 MTL	273	if (off > INT_MAX) {
	274	ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ASN1_R_TOO_LONG);
	275	goto err;
	276	}
3e575651	277
d3819813 MTL	278	*pb = b;
	279	return off;
	280	err:
	281	if (b != NULL)
	282	BUF_MEM_free(b);
	283	return -1;
	284	}