openssl/crypto/asn1/a_i2d_fp.c

/* crypto/asn1/a_i2d_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 "internal/cryptlib.h"
#include <openssl/buffer.h>
#include <openssl/asn1.h>

#ifndef NO_OLD_ASN1

# ifndef OPENSSL_NO_STDIO
int ASN1_i2d_fp(i2d_of_void *i2d, FILE *out, void *x)
{
    BIO *b;
    int ret;

    if ((b = BIO_new(BIO_s_file())) == NULL) {
        ASN1err(ASN1_F_ASN1_I2D_FP, ERR_R_BUF_LIB);
        return (0);
    }
    BIO_set_fp(b, out, BIO_NOCLOSE);
    ret = ASN1_i2d_bio(i2d, b, x);
    BIO_free(b);
    return (ret);
}
# endif

int ASN1_i2d_bio(i2d_of_void *i2d, BIO *out, unsigned char *x)
{
    char *b;
    unsigned char *p;
    int i, j = 0, n, ret = 1;

    n = i2d(x, NULL);
    b = OPENSSL_malloc(n);
    if (b == NULL) {
        ASN1err(ASN1_F_ASN1_I2D_BIO, ERR_R_MALLOC_FAILURE);
        return (0);
    }

    p = (unsigned char *)b;
    i2d(x, &p);

    for (;;) {
        i = BIO_write(out, &(b[j]), n);
        if (i == n)
            break;
        if (i <= 0) {
            ret = 0;
            break;
        }
        j += i;
        n -= i;
    }
    OPENSSL_free(b);
    return (ret);
}

#endif

#ifndef OPENSSL_NO_STDIO
int ASN1_item_i2d_fp(const ASN1_ITEM *it, FILE *out, void *x)
{
    BIO *b;
    int ret;

    if ((b = BIO_new(BIO_s_file())) == NULL) {
        ASN1err(ASN1_F_ASN1_ITEM_I2D_FP, ERR_R_BUF_LIB);
        return (0);
    }
    BIO_set_fp(b, out, BIO_NOCLOSE);
    ret = ASN1_item_i2d_bio(it, b, x);
    BIO_free(b);
    return (ret);
}
#endif

int ASN1_item_i2d_bio(const ASN1_ITEM *it, BIO *out, void *x)
{
    unsigned char *b = NULL;
    int i, j = 0, n, ret = 1;

    n = ASN1_item_i2d(x, &b, it);
    if (b == NULL) {
        ASN1err(ASN1_F_ASN1_ITEM_I2D_BIO, ERR_R_MALLOC_FAILURE);
        return (0);
    }

    for (;;) {
        i = BIO_write(out, &(b[j]), n);
        if (i == n)
            break;
        if (i <= 0) {
            ret = 0;
            break;
        }
        j += i;
        n -= i;
    }
    OPENSSL_free(b);
    return (ret);
}