/* crypto/pem/pem_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.]

 */

#include <stdio.h>

#include "cryptlib.h"

#include <openssl/buffer.h>

#include <openssl/objects.h>

#include <openssl/evp.h>

#include <openssl/rand.h>

#include <openssl/x509.h>

#include <openssl/pkcs12.h>

#include <openssl/pem.h>

static int do_pk8pkey(BIO *bp, EVP_PKEY *x, int isder,

                      int nid, const EVP_CIPHER *enc,

                      char *kstr, int klen, pem_password_cb *cb, void *u);

static int do_pk8pkey_fp(FILE *bp, EVP_PKEY *x, int isder,

                         int nid, const EVP_CIPHER *enc,

                         char *kstr, int klen, pem_password_cb *cb, void *u);

/*

 * These functions write a private key in PKCS#8 format: it is a "drop in"

 * replacement for PEM_write_bio_PrivateKey() and friends. As usual if 'enc'

 * is NULL then it uses the unencrypted private key form. The 'nid' versions

 * uses PKCS#5 v1.5 PBE algorithms whereas the others use PKCS#5 v2.0.

 */

int PEM_write_bio_PKCS8PrivateKey_nid(BIO *bp, EVP_PKEY *x, int nid,

                                      char *kstr, int klen,

                                      pem_password_cb *cb, void *u)

{

    return do_pk8pkey(bp, x, 0, nid, NULL, kstr, klen, cb, u);

}

int PEM_write_bio_PKCS8PrivateKey(BIO *bp, EVP_PKEY *x, const EVP_CIPHER *enc,

                                  char *kstr, int klen,

                                  pem_password_cb *cb, void *u)

{

    return do_pk8pkey(bp, x, 0, -1, enc, kstr, klen, cb, u);

}

int i2d_PKCS8PrivateKey_bio(BIO *bp, EVP_PKEY *x, const EVP_CIPHER *enc,

                            char *kstr, int klen,

                            pem_password_cb *cb, void *u)

{

    return do_pk8pkey(bp, x, 1, -1, enc, kstr, klen, cb, u);

}

int i2d_PKCS8PrivateKey_nid_bio(BIO *bp, EVP_PKEY *x, int nid,

                                char *kstr, int klen,

                                pem_password_cb *cb, void *u)

{

    return do_pk8pkey(bp, x, 1, nid, NULL, kstr, klen, cb, u);

}

static int do_pk8pkey(BIO *bp, EVP_PKEY *x, int isder, int nid,

                      const EVP_CIPHER *enc, char *kstr, int klen,

                      pem_password_cb *cb, void *u)

{

    X509_SIG *p8;

    PKCS8_PRIV_KEY_INFO *p8inf;

    char buf[PEM_BUFSIZE];

    int ret;

    if (!(p8inf = EVP_PKEY2PKCS8(x))) {

        PEMerr(PEM_F_DO_PK8PKEY, PEM_R_ERROR_CONVERTING_PRIVATE_KEY);

        return 0;

    }

    if (enc || (nid != -1)) {

        if (!kstr) {

            if (!cb)

                klen = PEM_def_callback(buf, PEM_BUFSIZE, 1, u);

            else

                klen = cb(buf, PEM_BUFSIZE, 1, u);

            if (klen <= 0) {

                PEMerr(PEM_F_DO_PK8PKEY, PEM_R_READ_KEY);

                PKCS8_PRIV_KEY_INFO_free(p8inf);

                return 0;

            }

            kstr = buf;

        }

        p8 = PKCS8_encrypt(nid, enc, kstr, klen, NULL, 0, 0, p8inf);

        if (kstr == buf)

            OPENSSL_cleanse(buf, klen);

        PKCS8_PRIV_KEY_INFO_free(p8inf);

        if (p8 == NULL)

            return 0;

        if (isder)

            ret = i2d_PKCS8_bio(bp, p8);

        else

            ret = PEM_write_bio_PKCS8(bp, p8);

        X509_SIG_free(p8);

        return ret;

    } else {

        if (isder)

            ret = i2d_PKCS8_PRIV_KEY_INFO_bio(bp, p8inf);

        else

            ret = PEM_write_bio_PKCS8_PRIV_KEY_INFO(bp, p8inf);

        PKCS8_PRIV_KEY_INFO_free(p8inf);

        return ret;

    }

}

EVP_PKEY *d2i_PKCS8PrivateKey_bio(BIO *bp, EVP_PKEY **x, pem_password_cb *cb,

                                  void *u)

{

    PKCS8_PRIV_KEY_INFO *p8inf = NULL;

    X509_SIG *p8 = NULL;

    int klen;

    EVP_PKEY *ret;

    char psbuf[PEM_BUFSIZE];

    p8 = d2i_PKCS8_bio(bp, NULL);

    if (!p8)

        return NULL;

    if (cb)

        klen = cb(psbuf, PEM_BUFSIZE, 0, u);

    else

        klen = PEM_def_callback(psbuf, PEM_BUFSIZE, 0, u);

    if (klen <= 0) {

        PEMerr(PEM_F_D2I_PKCS8PRIVATEKEY_BIO, PEM_R_BAD_PASSWORD_READ);

        X509_SIG_free(p8);

        return NULL;

    }

    p8inf = PKCS8_decrypt(p8, psbuf, klen);

    X509_SIG_free(p8);

    OPENSSL_cleanse(psbuf, klen);

    if (!p8inf)

        return NULL;

    ret = EVP_PKCS82PKEY(p8inf);

    PKCS8_PRIV_KEY_INFO_free(p8inf);

    if (!ret)

        return NULL;

    if (x) {

        if (*x)

            EVP_PKEY_free(*x);

        *x = ret;

    }

    return ret;

}

#ifndef OPENSSL_NO_FP_API

int i2d_PKCS8PrivateKey_fp(FILE *fp, EVP_PKEY *x, const EVP_CIPHER *enc,

                           char *kstr, int klen, pem_password_cb *cb, void *u)

{

    return do_pk8pkey_fp(fp, x, 1, -1, enc, kstr, klen, cb, u);

}

int i2d_PKCS8PrivateKey_nid_fp(FILE *fp, EVP_PKEY *x, int nid,

                               char *kstr, int klen,

                               pem_password_cb *cb, void *u)

{

    return do_pk8pkey_fp(fp, x, 1, nid, NULL, kstr, klen, cb, u);

}

int PEM_write_PKCS8PrivateKey_nid(FILE *fp, EVP_PKEY *x, int nid,

                                  char *kstr, int klen,

                                  pem_password_cb *cb, void *u)

{

    return do_pk8pkey_fp(fp, x, 0, nid, NULL, kstr, klen, cb, u);

}

int PEM_write_PKCS8PrivateKey(FILE *fp, EVP_PKEY *x, const EVP_CIPHER *enc,

                              char *kstr, int klen, pem_password_cb *cb,

                              void *u)

{

    return do_pk8pkey_fp(fp, x, 0, -1, enc, kstr, klen, cb, u);

}

static int do_pk8pkey_fp(FILE *fp, EVP_PKEY *x, int isder, int nid,

                         const EVP_CIPHER *enc, char *kstr, int klen,

                         pem_password_cb *cb, void *u)

{

    BIO *bp;

    int ret;

    if (!(bp = BIO_new_fp(fp, BIO_NOCLOSE))) {

        PEMerr(PEM_F_DO_PK8PKEY_FP, ERR_R_BUF_LIB);

        return (0);

    }

    ret = do_pk8pkey(bp, x, isder, nid, enc, kstr, klen, cb, u);

    BIO_free(bp);

    return ret;

}

EVP_PKEY *d2i_PKCS8PrivateKey_fp(FILE *fp, EVP_PKEY **x, pem_password_cb *cb,

                                 void *u)

{

    BIO *bp;

    EVP_PKEY *ret;

    if (!(bp = BIO_new_fp(fp, BIO_NOCLOSE))) {

        PEMerr(PEM_F_D2I_PKCS8PRIVATEKEY_FP, ERR_R_BUF_LIB);

        return NULL;

    }

    ret = d2i_PKCS8PrivateKey_bio(bp, x, cb, u);

    BIO_free(bp);

    return ret;

}

#endif

IMPLEMENT_PEM_rw(PKCS8, X509_SIG, PEM_STRING_PKCS8, X509_SIG)

IMPLEMENT_PEM_rw(PKCS8_PRIV_KEY_INFO, PKCS8_PRIV_KEY_INFO, PEM_STRING_PKCS8INF,

             PKCS8_PRIV_KEY_INFO)