crypto/asn1/t_pkey.c

/* crypto/asn1/t_pkey.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.]
 */
/* ====================================================================
 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 * Binary polynomial ECC support in OpenSSL originally developed by
 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
 */

#include <stdio.h>
#include "cryptlib.h"
#include <openssl/objects.h>
#include <openssl/buffer.h>
#include <openssl/bn.h>
#ifndef OPENSSL_NO_RSA
# include <openssl/rsa.h>
#endif
#ifndef OPENSSL_NO_DH
# include <openssl/dh.h>
#endif
#ifndef OPENSSL_NO_DSA
# include <openssl/dsa.h>
#endif
#ifndef OPENSSL_NO_EC
# include <openssl/ec.h>
#endif

static int print(BIO *fp, const char *str, const BIGNUM *num,
                 unsigned char *buf, int off);
#ifndef OPENSSL_NO_EC
static int print_bin(BIO *fp, const char *str, const unsigned char *num,
                     size_t len, int off);
#endif
#ifndef OPENSSL_NO_RSA
# ifndef OPENSSL_NO_FP_API
int RSA_print_fp(FILE *fp, const RSA *x, int off)
{
    BIO *b;
    int ret;

    if ((b = BIO_new(BIO_s_file())) == NULL) {
        RSAerr(RSA_F_RSA_PRINT_FP, ERR_R_BUF_LIB);
        return (0);
    }
    BIO_set_fp(b, fp, BIO_NOCLOSE);
    ret = RSA_print(b, x, off);
    BIO_free(b);
    return (ret);
}
# endif

int RSA_print(BIO *bp, const RSA *x, int off)
{
    char str[128];
    const char *s;
    unsigned char *m = NULL;
    int ret = 0, mod_len = 0;
    size_t buf_len = 0, i;

    if (x->n)
        buf_len = (size_t)BN_num_bytes(x->n);
    if (x->e)
        if (buf_len < (i = (size_t)BN_num_bytes(x->e)))
            buf_len = i;
    if (x->d)
        if (buf_len < (i = (size_t)BN_num_bytes(x->d)))
            buf_len = i;
    if (x->p)
        if (buf_len < (i = (size_t)BN_num_bytes(x->p)))
            buf_len = i;
    if (x->q)
        if (buf_len < (i = (size_t)BN_num_bytes(x->q)))
            buf_len = i;
    if (x->dmp1)
        if (buf_len < (i = (size_t)BN_num_bytes(x->dmp1)))
            buf_len = i;
    if (x->dmq1)
        if (buf_len < (i = (size_t)BN_num_bytes(x->dmq1)))
            buf_len = i;
    if (x->iqmp)
        if (buf_len < (i = (size_t)BN_num_bytes(x->iqmp)))
            buf_len = i;

    m = (unsigned char *)OPENSSL_malloc(buf_len + 10);
    if (m == NULL) {
        RSAerr(RSA_F_RSA_PRINT, ERR_R_MALLOC_FAILURE);
        goto err;
    }

    if (x->n != NULL)
        mod_len = BN_num_bits(x->n);

    if (x->d != NULL) {
        if (!BIO_indent(bp, off, 128))
            goto err;
        if (BIO_printf(bp, "Private-Key: (%d bit)\n", mod_len)
            <= 0)
            goto err;
    }

    if (x->d == NULL)
        BIO_snprintf(str, sizeof str, "Modulus (%d bit):", mod_len);
    else
        BUF_strlcpy(str, "modulus:", sizeof str);
    if (!print(bp, str, x->n, m, off))
        goto err;
    s = (x->d == NULL) ? "Exponent:" : "publicExponent:";
    if ((x->e != NULL) && !print(bp, s, x->e, m, off))
        goto err;
    if ((x->d != NULL) && !print(bp, "privateExponent:", x->d, m, off))
        goto err;
    if ((x->p != NULL) && !print(bp, "prime1:", x->p, m, off))
        goto err;
    if ((x->q != NULL) && !print(bp, "prime2:", x->q, m, off))
        goto err;
    if ((x->dmp1 != NULL) && !print(bp, "exponent1:", x->dmp1, m, off))
        goto err;
    if ((x->dmq1 != NULL) && !print(bp, "exponent2:", x->dmq1, m, off))
        goto err;
    if ((x->iqmp != NULL) && !print(bp, "coefficient:", x->iqmp, m, off))
        goto err;
    ret = 1;
 err:
    if (m != NULL)
        OPENSSL_free(m);
    return (ret);
}
#endif                          /* OPENSSL_NO_RSA */

#ifndef OPENSSL_NO_DSA
# ifndef OPENSSL_NO_FP_API
int DSA_print_fp(FILE *fp, const DSA *x, int off)
{
    BIO *b;
    int ret;

    if ((b = BIO_new(BIO_s_file())) == NULL) {
        DSAerr(DSA_F_DSA_PRINT_FP, ERR_R_BUF_LIB);
        return (0);
    }
    BIO_set_fp(b, fp, BIO_NOCLOSE);
    ret = DSA_print(b, x, off);
    BIO_free(b);
    return (ret);
}
# endif

int DSA_print(BIO *bp, const DSA *x, int off)
{
    unsigned char *m = NULL;
    int ret = 0;
    size_t buf_len = 0, i;

    if (x->p)
        buf_len = (size_t)BN_num_bytes(x->p);
    if (x->q)
        if (buf_len < (i = (size_t)BN_num_bytes(x->q)))
            buf_len = i;
    if (x->g)
        if (buf_len < (i = (size_t)BN_num_bytes(x->g)))
            buf_len = i;
    if (x->priv_key)
        if (buf_len < (i = (size_t)BN_num_bytes(x->priv_key)))
            buf_len = i;
    if (x->pub_key)
        if (buf_len < (i = (size_t)BN_num_bytes(x->pub_key)))
            buf_len = i;

    m = (unsigned char *)OPENSSL_malloc(buf_len + 10);
    if (m == NULL) {
        DSAerr(DSA_F_DSA_PRINT, ERR_R_MALLOC_FAILURE);
        goto err;
    }

    if (x->priv_key != NULL) {
        if (!BIO_indent(bp, off, 128))
            goto err;
        if (BIO_printf(bp, "Private-Key: (%d bit)\n", BN_num_bits(x->p))
            <= 0)
            goto err;
    }

    if ((x->priv_key != NULL) && !print(bp, "priv:", x->priv_key, m, off))
        goto err;
    if ((x->pub_key != NULL) && !print(bp, "pub: ", x->pub_key, m, off))
        goto err;
    if ((x->p != NULL) && !print(bp, "P:   ", x->p, m, off))
        goto err;
    if ((x->q != NULL) && !print(bp, "Q:   ", x->q, m, off))
        goto err;
    if ((x->g != NULL) && !print(bp, "G:   ", x->g, m, off))
        goto err;
    ret = 1;
 err:
    if (m != NULL)
        OPENSSL_free(m);
    return (ret);
}
#endif                          /* !OPENSSL_NO_DSA */

#ifndef OPENSSL_NO_EC
# ifndef OPENSSL_NO_FP_API
int ECPKParameters_print_fp(FILE *fp, const EC_GROUP *x, int off)
{
    BIO *b;
    int ret;

    if ((b = BIO_new(BIO_s_file())) == NULL) {
        ECerr(EC_F_ECPKPARAMETERS_PRINT_FP, ERR_R_BUF_LIB);
        return (0);
    }
    BIO_set_fp(b, fp, BIO_NOCLOSE);
    ret = ECPKParameters_print(b, x, off);
    BIO_free(b);
    return (ret);
}

int EC_KEY_print_fp(FILE *fp, const EC_KEY *x, int off)
{
    BIO *b;
    int ret;

    if ((b = BIO_new(BIO_s_file())) == NULL) {
        ECerr(EC_F_EC_KEY_PRINT_FP, ERR_R_BIO_LIB);
        return (0);
    }
    BIO_set_fp(b, fp, BIO_NOCLOSE);
    ret = EC_KEY_print(b, x, off);
    BIO_free(b);
    return (ret);
}
# endif

int ECPKParameters_print(BIO *bp, const EC_GROUP *x, int off)
{
    unsigned char *buffer = NULL;
    size_t buf_len = 0, i;
    int ret = 0, reason = ERR_R_BIO_LIB;
    BN_CTX *ctx = NULL;
    const EC_POINT *point = NULL;
    BIGNUM *p = NULL, *a = NULL, *b = NULL, *gen = NULL,
        *order = NULL, *cofactor = NULL;
    const unsigned char *seed;
    size_t seed_len = 0;

    static const char *gen_compressed = "Generator (compressed):";
    static const char *gen_uncompressed = "Generator (uncompressed):";
    static const char *gen_hybrid = "Generator (hybrid):";

    if (!x) {
        reason = ERR_R_PASSED_NULL_PARAMETER;
        goto err;
    }

    if (EC_GROUP_get_asn1_flag(x)) {
        /* the curve parameter are given by an asn1 OID */
        int nid;

        if (!BIO_indent(bp, off, 128))
            goto err;

        nid = EC_GROUP_get_curve_name(x);
        if (nid == 0)
            goto err;

        if (BIO_printf(bp, "ASN1 OID: %s", OBJ_nid2sn(nid)) <= 0)
            goto err;
        if (BIO_printf(bp, "\n") <= 0)
            goto err;
    } else {
        /* explicit parameters */
        int is_char_two = 0;
        point_conversion_form_t form;
        int tmp_nid = EC_METHOD_get_field_type(EC_GROUP_method_of(x));

        if (tmp_nid == NID_X9_62_characteristic_two_field)
            is_char_two = 1;

        if ((p = BN_new()) == NULL || (a = BN_new()) == NULL ||
            (b = BN_new()) == NULL || (order = BN_new()) == NULL ||
            (cofactor = BN_new()) == NULL) {
            reason = ERR_R_MALLOC_FAILURE;
            goto err;
        }

        if (is_char_two) {
            if (!EC_GROUP_get_curve_GF2m(x, p, a, b, ctx)) {
                reason = ERR_R_EC_LIB;
                goto err;
            }
        } else {                /* prime field */

            if (!EC_GROUP_get_curve_GFp(x, p, a, b, ctx)) {
                reason = ERR_R_EC_LIB;
                goto err;
            }
        }

        if ((point = EC_GROUP_get0_generator(x)) == NULL) {
            reason = ERR_R_EC_LIB;
            goto err;
        }
        if (!EC_GROUP_get_order(x, order, NULL) ||
            !EC_GROUP_get_cofactor(x, cofactor, NULL)) {
            reason = ERR_R_EC_LIB;
            goto err;
        }

        form = EC_GROUP_get_point_conversion_form(x);

        if ((gen = EC_POINT_point2bn(x, point, form, NULL, ctx)) == NULL) {
            reason = ERR_R_EC_LIB;
            goto err;
        }

        buf_len = (size_t)BN_num_bytes(p);
        if (buf_len < (i = (size_t)BN_num_bytes(a)))
            buf_len = i;
        if (buf_len < (i = (size_t)BN_num_bytes(b)))
            buf_len = i;
        if (buf_len < (i = (size_t)BN_num_bytes(gen)))
            buf_len = i;
        if (buf_len < (i = (size_t)BN_num_bytes(order)))
            buf_len = i;
        if (buf_len < (i = (size_t)BN_num_bytes(cofactor)))
            buf_len = i;

        if ((seed = EC_GROUP_get0_seed(x)) != NULL)
            seed_len = EC_GROUP_get_seed_len(x);

        buf_len += 10;
        if ((buffer = OPENSSL_malloc(buf_len)) == NULL) {
            reason = ERR_R_MALLOC_FAILURE;
            goto err;
        }

        if (!BIO_indent(bp, off, 128))
            goto err;

        /* print the 'short name' of the field type */
        if (BIO_printf(bp, "Field Type: %s\n", OBJ_nid2sn(tmp_nid))
            <= 0)
            goto err;

        if (is_char_two) {
            /* print the 'short name' of the base type OID */
            int basis_type = EC_GROUP_get_basis_type(x);
            if (basis_type == 0)
                goto err;

            if (!BIO_indent(bp, off, 128))
                goto err;

            if (BIO_printf(bp, "Basis Type: %s\n",
                           OBJ_nid2sn(basis_type)) <= 0)
                goto err;

            /* print the polynomial */
            if ((p != NULL) && !print(bp, "Polynomial:", p, buffer, off))
                goto err;
        } else {
            if ((p != NULL) && !print(bp, "Prime:", p, buffer, off))
                goto err;
        }
        if ((a != NULL) && !print(bp, "A:   ", a, buffer, off))
            goto err;
        if ((b != NULL) && !print(bp, "B:   ", b, buffer, off))
            goto err;
        if (form == POINT_CONVERSION_COMPRESSED) {
            if ((gen != NULL) && !print(bp, gen_compressed, gen, buffer, off))
                goto err;
        } else if (form == POINT_CONVERSION_UNCOMPRESSED) {
            if ((gen != NULL) && !print(bp, gen_uncompressed, gen,
                                        buffer, off))
                goto err;
        } else {                /* form == POINT_CONVERSION_HYBRID */

            if ((gen != NULL) && !print(bp, gen_hybrid, gen, buffer, off))
                goto err;
        }
        if ((order != NULL) && !print(bp, "Order: ", order, buffer, off))
            goto err;
        if ((cofactor != NULL) && !print(bp, "Cofactor: ", cofactor,
                                         buffer, off))
            goto err;
        if (seed && !print_bin(bp, "Seed:", seed, seed_len, off))
            goto err;
    }
    ret = 1;
 err:
    if (!ret)
        ECerr(EC_F_ECPKPARAMETERS_PRINT, reason);
    if (p)
        BN_free(p);
    if (a)
        BN_free(a);
    if (b)
        BN_free(b);
    if (gen)
        BN_free(gen);
    if (order)
        BN_free(order);
    if (cofactor)
        BN_free(cofactor);
    if (ctx)
        BN_CTX_free(ctx);
    if (buffer != NULL)
        OPENSSL_free(buffer);
    return (ret);
}

int EC_KEY_print(BIO *bp, const EC_KEY *x, int off)
{
    unsigned char *buffer = NULL;
    size_t buf_len = 0, i;
    int ret = 0, reason = ERR_R_BIO_LIB;
    BIGNUM *pub_key = NULL, *order = NULL;
    BN_CTX *ctx = NULL;
    const EC_GROUP *group;
    const EC_POINT *public_key;
    const BIGNUM *priv_key;

    if (x == NULL || (group = EC_KEY_get0_group(x)) == NULL) {
        reason = ERR_R_PASSED_NULL_PARAMETER;
        goto err;
    }

    public_key = EC_KEY_get0_public_key(x);
    if ((pub_key = EC_POINT_point2bn(group, public_key,
                                     EC_KEY_get_conv_form(x), NULL,
                                     ctx)) == NULL) {
        reason = ERR_R_EC_LIB;
        goto err;
    }

    buf_len = (size_t)BN_num_bytes(pub_key);
    priv_key = EC_KEY_get0_private_key(x);
    if (priv_key != NULL) {
        if ((i = (size_t)BN_num_bytes(priv_key)) > buf_len)
            buf_len = i;
    }

    buf_len += 10;
    if ((buffer = OPENSSL_malloc(buf_len)) == NULL) {
        reason = ERR_R_MALLOC_FAILURE;
        goto err;
    }

    if (priv_key != NULL) {
        if (!BIO_indent(bp, off, 128))
            goto err;
        if ((order = BN_new()) == NULL)
            goto err;
        if (!EC_GROUP_get_order(group, order, NULL))
            goto err;
        if (BIO_printf(bp, "Private-Key: (%d bit)\n",
                       BN_num_bits(order)) <= 0)
            goto err;
    }

    if ((priv_key != NULL) && !print(bp, "priv:", priv_key, buffer, off))
        goto err;
    if ((pub_key != NULL) && !print(bp, "pub: ", pub_key, buffer, off))
        goto err;
    if (!ECPKParameters_print(bp, group, off))
        goto err;
    ret = 1;
 err:
    if (!ret)
        ECerr(EC_F_EC_KEY_PRINT, reason);
    if (pub_key)
        BN_free(pub_key);
    if (order)
        BN_free(order);
    if (ctx)
        BN_CTX_free(ctx);
    if (buffer != NULL)
        OPENSSL_free(buffer);
    return (ret);
}
#endif                          /* OPENSSL_NO_EC */

static int print(BIO *bp, const char *number, const BIGNUM *num,
                 unsigned char *buf, int off)
{
    int n, i;
    const char *neg;

    if (num == NULL)
        return (1);
    neg = (BN_is_negative(num)) ? "-" : "";
    if (!BIO_indent(bp, off, 128))
        return 0;
    if (BN_is_zero(num)) {
        if (BIO_printf(bp, "%s 0\n", number) <= 0)
            return 0;
        return 1;
    }

    if (BN_num_bytes(num) <= BN_BYTES) {
        if (BIO_printf(bp, "%s %s%lu (%s0x%lx)\n", number, neg,
                       (unsigned long)num->d[0], neg,
                       (unsigned long)num->d[0])
            <= 0)
            return (0);
    } else {
        buf[0] = 0;
        if (BIO_printf(bp, "%s%s", number,
                       (neg[0] == '-') ? " (Negative)" : "") <= 0)
            return (0);
        n = BN_bn2bin(num, &buf[1]);

        if (buf[1] & 0x80)
            n++;
        else
            buf++;

        for (i = 0; i < n; i++) {
            if ((i % 15) == 0) {
                if (BIO_puts(bp, "\n") <= 0 || !BIO_indent(bp, off + 4, 128))
                    return 0;
            }
            if (BIO_printf(bp, "%02x%s", buf[i], ((i + 1) == n) ? "" : ":")
                <= 0)
                return (0);
        }
        if (BIO_write(bp, "\n", 1) <= 0)
            return (0);
    }
    return (1);
}

#ifndef OPENSSL_NO_EC
static int print_bin(BIO *fp, const char *name, const unsigned char *buf,
                     size_t len, int off)
{
    size_t i;
    char str[128];

    if (buf == NULL)
        return 1;
    if (off) {
        if (off > 128)
            off = 128;
        memset(str, ' ', off);
        if (BIO_write(fp, str, off) <= 0)
            return 0;
    }

    if (BIO_printf(fp, "%s", name) <= 0)
        return 0;

    for (i = 0; i < len; i++) {
        if ((i % 15) == 0) {
            str[0] = '\n';
            memset(&(str[1]), ' ', off + 4);
            if (BIO_write(fp, str, off + 1 + 4) <= 0)
                return 0;
        }
        if (BIO_printf(fp, "%02x%s", buf[i], ((i + 1) == len) ? "" : ":") <=
            0)
            return 0;
    }
    if (BIO_write(fp, "\n", 1) <= 0)
        return 0;

    return 1;
}
#endif

#ifndef OPENSSL_NO_DH
# ifndef OPENSSL_NO_FP_API
int DHparams_print_fp(FILE *fp, const DH *x)
{
    BIO *b;
    int ret;

    if ((b = BIO_new(BIO_s_file())) == NULL) {
        DHerr(DH_F_DHPARAMS_PRINT_FP, ERR_R_BUF_LIB);
        return (0);
    }
    BIO_set_fp(b, fp, BIO_NOCLOSE);
    ret = DHparams_print(b, x);
    BIO_free(b);
    return (ret);
}
# endif

int DHparams_print(BIO *bp, const DH *x)
{
    unsigned char *m = NULL;
    int reason = ERR_R_BUF_LIB, ret = 0;
    size_t buf_len = 0, i;

    if (x->p)
        buf_len = (size_t)BN_num_bytes(x->p);
    else {
        reason = ERR_R_PASSED_NULL_PARAMETER;
        goto err;
    }
    if (x->g)
        if (buf_len < (i = (size_t)BN_num_bytes(x->g)))
            buf_len = i;
    m = (unsigned char *)OPENSSL_malloc(buf_len + 10);
    if (m == NULL) {
        reason = ERR_R_MALLOC_FAILURE;
        goto err;
    }

    if (BIO_printf(bp, "Diffie-Hellman-Parameters: (%d bit)\n",
                   BN_num_bits(x->p)) <= 0)
        goto err;
    if (!print(bp, "prime:", x->p, m, 4))
        goto err;
    if (!print(bp, "generator:", x->g, m, 4))
        goto err;
    if (x->length != 0) {
        if (BIO_printf(bp, "    recommended-private-length: %d bits\n",
                       (int)x->length) <= 0)
            goto err;
    }
    ret = 1;
    if (0) {
 err:
        DHerr(DH_F_DHPARAMS_PRINT, reason);
    }
    if (m != NULL)
        OPENSSL_free(m);
    return (ret);
}
#endif

#ifndef OPENSSL_NO_DSA
# ifndef OPENSSL_NO_FP_API
int DSAparams_print_fp(FILE *fp, const DSA *x)
{
    BIO *b;
    int ret;

    if ((b = BIO_new(BIO_s_file())) == NULL) {
        DSAerr(DSA_F_DSAPARAMS_PRINT_FP, ERR_R_BUF_LIB);
        return (0);
    }
    BIO_set_fp(b, fp, BIO_NOCLOSE);
    ret = DSAparams_print(b, x);
    BIO_free(b);
    return (ret);
}
# endif

int DSAparams_print(BIO *bp, const DSA *x)
{
    unsigned char *m = NULL;
    int ret = 0;
    size_t buf_len = 0, i;

    if (x->p)
        buf_len = (size_t)BN_num_bytes(x->p);
    else {
        DSAerr(DSA_F_DSAPARAMS_PRINT, DSA_R_MISSING_PARAMETERS);
        goto err;
    }
    if (x->q)
        if (buf_len < (i = (size_t)BN_num_bytes(x->q)))
            buf_len = i;
    if (x->g)
        if (buf_len < (i = (size_t)BN_num_bytes(x->g)))
            buf_len = i;
    m = (unsigned char *)OPENSSL_malloc(buf_len + 10);
    if (m == NULL) {
        DSAerr(DSA_F_DSAPARAMS_PRINT, ERR_R_MALLOC_FAILURE);
        goto err;
    }

    if (BIO_printf(bp, "DSA-Parameters: (%d bit)\n", BN_num_bits(x->p)) <= 0)
        goto err;
    if (!print(bp, "p:", x->p, m, 4))
        goto err;
    if ((x->q != NULL) && !print(bp, "q:", x->q, m, 4))
        goto err;
    if ((x->g != NULL) && !print(bp, "g:", x->g, m, 4))
        goto err;
    ret = 1;
 err:
    if (m != NULL)
        OPENSSL_free(m);
    return (ret);
}

#endif                          /* !OPENSSL_NO_DSA */

#ifndef OPENSSL_NO_EC
# ifndef OPENSSL_NO_FP_API
int ECParameters_print_fp(FILE *fp, const EC_KEY *x)
{
    BIO *b;
    int ret;

    if ((b = BIO_new(BIO_s_file())) == NULL) {
        ECerr(EC_F_ECPARAMETERS_PRINT_FP, ERR_R_BIO_LIB);
        return (0);
    }
    BIO_set_fp(b, fp, BIO_NOCLOSE);
    ret = ECParameters_print(b, x);
    BIO_free(b);
    return (ret);
}
# endif

int ECParameters_print(BIO *bp, const EC_KEY *x)
{
    int reason = ERR_R_EC_LIB, ret = 0;
    BIGNUM *order = NULL;
    const EC_GROUP *group;

    if (x == NULL || (group = EC_KEY_get0_group(x)) == NULL) {
        reason = ERR_R_PASSED_NULL_PARAMETER;;
        goto err;
    }

    if ((order = BN_new()) == NULL) {
        reason = ERR_R_MALLOC_FAILURE;
        goto err;
    }

    if (!EC_GROUP_get_order(group, order, NULL)) {
        reason = ERR_R_EC_LIB;
        goto err;
    }

    if (BIO_printf(bp, "ECDSA-Parameters: (%d bit)\n",
                   BN_num_bits(order)) <= 0)
        goto err;
    if (!ECPKParameters_print(bp, group, 4))
        goto err;
    ret = 1;
 err:
    if (order)
        BN_free(order);
    ECerr(EC_F_ECPARAMETERS_PRINT, reason);
    return (ret);
}

#endif