Use p==NULL not !p (in if statements, mainly)

[thirdparty/openssl.git] / crypto / evp / evp_pkey.c

/* evp_pkey.c */
/*
 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
 * 1999.
 */
/* ====================================================================
 * Copyright (c) 1999-2005 The OpenSSL Project.  All rights reserved.
 *
 * 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 above 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 acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    licensing@OpenSSL.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED 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 OpenSSL PROJECT OR
 * ITS 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.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */

#include <stdio.h>
#include <stdlib.h>
#include "cryptlib.h"
#include <openssl/x509.h>
#include <openssl/rand.h>
#include "internal/asn1_int.h"

/* Extract a private key from a PKCS8 structure */

EVP_PKEY *EVP_PKCS82PKEY(PKCS8_PRIV_KEY_INFO *p8)
{
    EVP_PKEY *pkey = NULL;
    ASN1_OBJECT *algoid;
    char obj_tmp[80];

    if (!PKCS8_pkey_get0(&algoid, NULL, NULL, NULL, p8))
        return NULL;

    if ((pkey = EVP_PKEY_new()) == NULL) {
        EVPerr(EVP_F_EVP_PKCS82PKEY, ERR_R_MALLOC_FAILURE);
        return NULL;
    }

    if (!EVP_PKEY_set_type(pkey, OBJ_obj2nid(algoid))) {
        EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM);
        i2t_ASN1_OBJECT(obj_tmp, 80, algoid);
        ERR_add_error_data(2, "TYPE=", obj_tmp);
        goto error;
    }

    if (pkey->ameth->priv_decode) {
        if (!pkey->ameth->priv_decode(pkey, p8)) {
            EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_PRIVATE_KEY_DECODE_ERROR);
            goto error;
        }
    } else {
        EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_METHOD_NOT_SUPPORTED);
        goto error;
    }

    return pkey;

 error:
    EVP_PKEY_free(pkey);
    return NULL;
}

PKCS8_PRIV_KEY_INFO *EVP_PKEY2PKCS8(EVP_PKEY *pkey)
{
    return EVP_PKEY2PKCS8_broken(pkey, PKCS8_OK);
}

/* Turn a private key into a PKCS8 structure */

PKCS8_PRIV_KEY_INFO *EVP_PKEY2PKCS8_broken(EVP_PKEY *pkey, int broken)
{
    PKCS8_PRIV_KEY_INFO *p8;

    if ((p8 = PKCS8_PRIV_KEY_INFO_new()) == NULL) {
        EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN, ERR_R_MALLOC_FAILURE);
        return NULL;
    }
    p8->broken = broken;

    if (pkey->ameth) {
        if (pkey->ameth->priv_encode) {
            if (!pkey->ameth->priv_encode(p8, pkey)) {
                EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN,
                       EVP_R_PRIVATE_KEY_ENCODE_ERROR);
                goto error;
            }
        } else {
            EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN, EVP_R_METHOD_NOT_SUPPORTED);
            goto error;
        }
    } else {
        EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN,
               EVP_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM);
        goto error;
    }
    RAND_add(p8->pkey->value.octet_string->data,
             p8->pkey->value.octet_string->length, 0.0);
    return p8;
 error:
    PKCS8_PRIV_KEY_INFO_free(p8);
    return NULL;
}

PKCS8_PRIV_KEY_INFO *PKCS8_set_broken(PKCS8_PRIV_KEY_INFO *p8, int broken)
{
    switch (broken) {

    case PKCS8_OK:
        p8->broken = PKCS8_OK;
        return p8;

    case PKCS8_NO_OCTET:
        p8->broken = PKCS8_NO_OCTET;
        p8->pkey->type = V_ASN1_SEQUENCE;
        return p8;

    default:
        EVPerr(EVP_F_PKCS8_SET_BROKEN, EVP_R_PKCS8_UNKNOWN_BROKEN_TYPE);
        return NULL;
    }
}

/* EVP_PKEY attribute functions */

int EVP_PKEY_get_attr_count(const EVP_PKEY *key)
{
    return X509at_get_attr_count(key->attributes);
}

int EVP_PKEY_get_attr_by_NID(const EVP_PKEY *key, int nid, int lastpos)
{
    return X509at_get_attr_by_NID(key->attributes, nid, lastpos);
}

int EVP_PKEY_get_attr_by_OBJ(const EVP_PKEY *key, ASN1_OBJECT *obj,
                             int lastpos)
{
    return X509at_get_attr_by_OBJ(key->attributes, obj, lastpos);
}

X509_ATTRIBUTE *EVP_PKEY_get_attr(const EVP_PKEY *key, int loc)
{
    return X509at_get_attr(key->attributes, loc);
}

X509_ATTRIBUTE *EVP_PKEY_delete_attr(EVP_PKEY *key, int loc)
{
    return X509at_delete_attr(key->attributes, loc);
}

int EVP_PKEY_add1_attr(EVP_PKEY *key, X509_ATTRIBUTE *attr)
{
    if (X509at_add1_attr(&key->attributes, attr))
        return 1;
    return 0;
}

int EVP_PKEY_add1_attr_by_OBJ(EVP_PKEY *key,
                              const ASN1_OBJECT *obj, int type,
                              const unsigned char *bytes, int len)
{
    if (X509at_add1_attr_by_OBJ(&key->attributes, obj, type, bytes, len))
        return 1;
    return 0;
}

int EVP_PKEY_add1_attr_by_NID(EVP_PKEY *key,
                              int nid, int type,
                              const unsigned char *bytes, int len)
{
    if (X509at_add1_attr_by_NID(&key->attributes, nid, type, bytes, len))
        return 1;
    return 0;
}

int EVP_PKEY_add1_attr_by_txt(EVP_PKEY *key,
                              const char *attrname, int type,
                              const unsigned char *bytes, int len)
{
    if (X509at_add1_attr_by_txt(&key->attributes, attrname, type, bytes, len))
        return 1;
    return 0;
}