/*

 * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.

 *

 * Licensed under the OpenSSL license (the "License").  You may not use

 * this file except in compliance with the License.  You can obtain a copy

 * in the file LICENSE in the source distribution or at

 * https://www.openssl.org/source/license.html

 */

#include <stdio.h>

#include "internal/cryptlib.h"

#include <openssl/bio.h>

#include <openssl/evp.h>

#include <openssl/x509.h>

#include <openssl/pkcs7.h>

#include <openssl/pem.h>

#include <openssl/rsa.h>

#include <openssl/dsa.h>

#include <openssl/dh.h>

#ifndef OPENSSL_NO_RSA

static RSA *pkey_get_rsa(EVP_PKEY *key, RSA **rsa);

#endif

#ifndef OPENSSL_NO_DSA

static DSA *pkey_get_dsa(EVP_PKEY *key, DSA **dsa);

#endif

#ifndef OPENSSL_NO_EC

static EC_KEY *pkey_get_eckey(EVP_PKEY *key, EC_KEY **eckey);

#endif

IMPLEMENT_PEM_rw(X509_REQ, X509_REQ, PEM_STRING_X509_REQ, X509_REQ)

IMPLEMENT_PEM_write(X509_REQ_NEW, X509_REQ, PEM_STRING_X509_REQ_OLD, X509_REQ)

IMPLEMENT_PEM_rw(X509_CRL, X509_CRL, PEM_STRING_X509_CRL, X509_CRL)

IMPLEMENT_PEM_rw(PKCS7, PKCS7, PEM_STRING_PKCS7, PKCS7)

IMPLEMENT_PEM_rw(NETSCAPE_CERT_SEQUENCE, NETSCAPE_CERT_SEQUENCE,

                 PEM_STRING_X509, NETSCAPE_CERT_SEQUENCE)

#ifndef OPENSSL_NO_RSA

/*

 * We treat RSA or DSA private keys as a special case. For private keys we

 * read in an EVP_PKEY structure with PEM_read_bio_PrivateKey() and extract

 * the relevant private key: this means can handle "traditional" and PKCS#8

 * formats transparently.

 */

static RSA *pkey_get_rsa(EVP_PKEY *key, RSA **rsa)

{

    RSA *rtmp;

    if (!key)

        return NULL;

    rtmp = EVP_PKEY_get1_RSA(key);

    EVP_PKEY_free(key);

    if (!rtmp)

        return NULL;

    if (rsa) {

        RSA_free(*rsa);

        *rsa = rtmp;

    }

    return rtmp;

}

RSA *PEM_read_bio_RSAPrivateKey(BIO *bp, RSA **rsa, pem_password_cb *cb,

                                void *u)

{

    EVP_PKEY *pktmp;

    pktmp = PEM_read_bio_PrivateKey(bp, NULL, cb, u);

    return pkey_get_rsa(pktmp, rsa);

}

# ifndef OPENSSL_NO_STDIO

RSA *PEM_read_RSAPrivateKey(FILE *fp, RSA **rsa, pem_password_cb *cb, void *u)

{

    EVP_PKEY *pktmp;

    pktmp = PEM_read_PrivateKey(fp, NULL, cb, u);

    return pkey_get_rsa(pktmp, rsa);

}

# endif

IMPLEMENT_PEM_write_cb_const(RSAPrivateKey, RSA, PEM_STRING_RSA,

                             RSAPrivateKey)

IMPLEMENT_PEM_rw_const(RSAPublicKey, RSA, PEM_STRING_RSA_PUBLIC,

                       RSAPublicKey)

IMPLEMENT_PEM_rw(RSA_PUBKEY, RSA, PEM_STRING_PUBLIC, RSA_PUBKEY)

#endif

#ifndef OPENSSL_NO_DSA

static DSA *pkey_get_dsa(EVP_PKEY *key, DSA **dsa)

{

    DSA *dtmp;

    if (!key)

        return NULL;

    dtmp = EVP_PKEY_get1_DSA(key);

    EVP_PKEY_free(key);

    if (!dtmp)

        return NULL;

    if (dsa) {

        DSA_free(*dsa);

        *dsa = dtmp;

    }

    return dtmp;

}

DSA *PEM_read_bio_DSAPrivateKey(BIO *bp, DSA **dsa, pem_password_cb *cb,

                                void *u)

{

    EVP_PKEY *pktmp;

    pktmp = PEM_read_bio_PrivateKey(bp, NULL, cb, u);

    return pkey_get_dsa(pktmp, dsa); /* will free pktmp */

}

IMPLEMENT_PEM_write_cb_const(DSAPrivateKey, DSA, PEM_STRING_DSA,

                             DSAPrivateKey)

IMPLEMENT_PEM_rw(DSA_PUBKEY, DSA, PEM_STRING_PUBLIC, DSA_PUBKEY)

# ifndef OPENSSL_NO_STDIO

DSA *PEM_read_DSAPrivateKey(FILE *fp, DSA **dsa, pem_password_cb *cb, void *u)

{

    EVP_PKEY *pktmp;

    pktmp = PEM_read_PrivateKey(fp, NULL, cb, u);

    return pkey_get_dsa(pktmp, dsa); /* will free pktmp */

}

# endif

IMPLEMENT_PEM_rw_const(DSAparams, DSA, PEM_STRING_DSAPARAMS, DSAparams)

#endif

#ifndef OPENSSL_NO_EC

static EC_KEY *pkey_get_eckey(EVP_PKEY *key, EC_KEY **eckey)

{

    EC_KEY *dtmp;

    if (!key)

        return NULL;

    dtmp = EVP_PKEY_get1_EC_KEY(key);

    EVP_PKEY_free(key);

    if (!dtmp)

        return NULL;

    if (eckey) {

        EC_KEY_free(*eckey);

        *eckey = dtmp;

    }

    return dtmp;

}

EC_KEY *PEM_read_bio_ECPrivateKey(BIO *bp, EC_KEY **key, pem_password_cb *cb,

                                  void *u)

{

    EVP_PKEY *pktmp;

    pktmp = PEM_read_bio_PrivateKey(bp, NULL, cb, u);

    return pkey_get_eckey(pktmp, key); /* will free pktmp */

}

IMPLEMENT_PEM_rw_const(ECPKParameters, EC_GROUP, PEM_STRING_ECPARAMETERS,

                       ECPKParameters)

IMPLEMENT_PEM_write_cb(ECPrivateKey, EC_KEY, PEM_STRING_ECPRIVATEKEY,

                       ECPrivateKey)

IMPLEMENT_PEM_rw(EC_PUBKEY, EC_KEY, PEM_STRING_PUBLIC, EC_PUBKEY)

# ifndef OPENSSL_NO_STDIO

EC_KEY *PEM_read_ECPrivateKey(FILE *fp, EC_KEY **eckey, pem_password_cb *cb,

                              void *u)

{

    EVP_PKEY *pktmp;

    pktmp = PEM_read_PrivateKey(fp, NULL, cb, u);

    return pkey_get_eckey(pktmp, eckey); /* will free pktmp */

}

# endif

#endif

#ifndef OPENSSL_NO_DH

IMPLEMENT_PEM_write_const(DHparams, DH, PEM_STRING_DHPARAMS, DHparams)

IMPLEMENT_PEM_write_const(DHxparams, DH, PEM_STRING_DHXPARAMS, DHxparams)

#endif

IMPLEMENT_PEM_rw(PUBKEY, EVP_PKEY, PEM_STRING_PUBLIC, PUBKEY)