/* $OpenBSD: rsa_asn1.c,v 1.15 2019/10/25 14:40:18 jsing Exp $ */

/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL

 * project 2000.

 */

/* ====================================================================

 * Copyright (c) 2000-2005 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,

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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

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 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED

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 * ====================================================================

 *

 * 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 <openssl/asn1t.h>

#include <openssl/bn.h>

#include <openssl/rsa.h>

#include <openssl/x509.h>

#include "rsa_locl.h"

/* Override the default free and new methods */

static int

rsa_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, void *exarg)

{

  if (operation == ASN1_OP_NEW_PRE) {

    *pval = (ASN1_VALUE *)RSA_new();

    if (*pval)

      return 2;

    return 0;

  } else if (operation == ASN1_OP_FREE_PRE) {

    RSA_free((RSA *)*pval);

    *pval = NULL;

    return 2;

  }

  return 1;

}

static const ASN1_AUX RSAPrivateKey_aux = {

  .app_data = NULL,

  .flags = 0,

  .ref_offset = 0,

  .ref_lock = 0,

  .asn1_cb = rsa_cb,

  .enc_offset = 0,

};

static const ASN1_TEMPLATE RSAPrivateKey_seq_tt[] = {

  {

    .flags = 0,

    .tag = 0,

    .offset = offsetof(RSA, version),

    .field_name = "version",

    .item = &LONG_it,

  },

  {

    .flags = 0,

    .tag = 0,

    .offset = offsetof(RSA, n),

    .field_name = "n",

    .item = &BIGNUM_it,

  },

  {

    .flags = 0,

    .tag = 0,

    .offset = offsetof(RSA, e),

    .field_name = "e",

    .item = &BIGNUM_it,

  },

  {

    .flags = 0,

    .tag = 0,

    .offset = offsetof(RSA, d),

    .field_name = "d",

    .item = &BIGNUM_it,

  },

  {

    .flags = 0,

    .tag = 0,

    .offset = offsetof(RSA, p),

    .field_name = "p",

    .item = &BIGNUM_it,

  },

  {

    .flags = 0,

    .tag = 0,

    .offset = offsetof(RSA, q),

    .field_name = "q",

    .item = &BIGNUM_it,

  },

  {

    .flags = 0,

    .tag = 0,

    .offset = offsetof(RSA, dmp1),

    .field_name = "dmp1",

    .item = &BIGNUM_it,

  },

  {

    .flags = 0,

    .tag = 0,

    .offset = offsetof(RSA, dmq1),

    .field_name = "dmq1",

    .item = &BIGNUM_it,

  },

  {

    .flags = 0,

    .tag = 0,

    .offset = offsetof(RSA, iqmp),

    .field_name = "iqmp",

    .item = &BIGNUM_it,

  },

};

const ASN1_ITEM RSAPrivateKey_it = {

  .itype = ASN1_ITYPE_SEQUENCE,

  .utype = V_ASN1_SEQUENCE,

  .templates = RSAPrivateKey_seq_tt,

  .tcount = sizeof(RSAPrivateKey_seq_tt) / sizeof(ASN1_TEMPLATE),

  .funcs = &RSAPrivateKey_aux,

  .size = sizeof(RSA),

  .sname = "RSA",

};

static const ASN1_AUX RSAPublicKey_aux = {

  .app_data = NULL,

  .flags = 0,

  .ref_offset = 0,

  .ref_lock = 0,

  .asn1_cb = rsa_cb,

  .enc_offset = 0,

};

static const ASN1_TEMPLATE RSAPublicKey_seq_tt[] = {

  {

    .flags = 0,

    .tag = 0,

    .offset = offsetof(RSA, n),

    .field_name = "n",

    .item = &BIGNUM_it,

  },

  {

    .flags = 0,

    .tag = 0,

    .offset = offsetof(RSA, e),

    .field_name = "e",

    .item = &BIGNUM_it,

  },

};

const ASN1_ITEM RSAPublicKey_it = {

  .itype = ASN1_ITYPE_SEQUENCE,

  .utype = V_ASN1_SEQUENCE,

  .templates = RSAPublicKey_seq_tt,

  .tcount = sizeof(RSAPublicKey_seq_tt) / sizeof(ASN1_TEMPLATE),

  .funcs = &RSAPublicKey_aux,

  .size = sizeof(RSA),

  .sname = "RSA",

};

static int

rsa_pss_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, void *exarg)

{

  /* Free up maskHash */

  if (operation == ASN1_OP_FREE_PRE) {

    RSA_PSS_PARAMS *pss = (RSA_PSS_PARAMS *)*pval;

    X509_ALGOR_free(pss->maskHash);

  }

  return 1;

}

static const ASN1_AUX RSA_PSS_PARAMS_aux = {

  .app_data = NULL,

  .flags = 0,

  .ref_offset = 0,

  .ref_lock = 0,

  .asn1_cb = rsa_pss_cb,

  .enc_offset = 0,

};

static const ASN1_TEMPLATE RSA_PSS_PARAMS_seq_tt[] = {

  {

    .flags = ASN1_TFLG_EXPLICIT | ASN1_TFLG_OPTIONAL,

    .tag = 0,

    .offset = offsetof(RSA_PSS_PARAMS, hashAlgorithm),

    .field_name = "hashAlgorithm",

    .item = &X509_ALGOR_it,

  },

  {

    .flags = ASN1_TFLG_EXPLICIT | ASN1_TFLG_OPTIONAL,

    .tag = 1,

    .offset = offsetof(RSA_PSS_PARAMS, maskGenAlgorithm),

    .field_name = "maskGenAlgorithm",

    .item = &X509_ALGOR_it,

  },

  {

    .flags = ASN1_TFLG_EXPLICIT | ASN1_TFLG_OPTIONAL,

    .tag = 2,

    .offset = offsetof(RSA_PSS_PARAMS, saltLength),

    .field_name = "saltLength",

    .item = &ASN1_INTEGER_it,

  },

  {

    .flags = ASN1_TFLG_EXPLICIT | ASN1_TFLG_OPTIONAL,

    .tag = 3,

    .offset = offsetof(RSA_PSS_PARAMS, trailerField),

    .field_name = "trailerField",

    .item = &ASN1_INTEGER_it,

  },

};

const ASN1_ITEM RSA_PSS_PARAMS_it = {

  .itype = ASN1_ITYPE_SEQUENCE,

  .utype = V_ASN1_SEQUENCE,

  .templates = RSA_PSS_PARAMS_seq_tt,

  .tcount = sizeof(RSA_PSS_PARAMS_seq_tt) / sizeof(ASN1_TEMPLATE),

  .funcs = &RSA_PSS_PARAMS_aux,

  .size = sizeof(RSA_PSS_PARAMS),

  .sname = "RSA_PSS_PARAMS",

};

RSA_PSS_PARAMS *

d2i_RSA_PSS_PARAMS(RSA_PSS_PARAMS **a, const unsigned char **in, long len)

{

  return (RSA_PSS_PARAMS *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,

      &RSA_PSS_PARAMS_it);

}

int

i2d_RSA_PSS_PARAMS(RSA_PSS_PARAMS *a, unsigned char **out)

{

  return ASN1_item_i2d((ASN1_VALUE *)a, out, &RSA_PSS_PARAMS_it);

}

RSA_PSS_PARAMS *

RSA_PSS_PARAMS_new(void)

{

  return (RSA_PSS_PARAMS *)ASN1_item_new(&RSA_PSS_PARAMS_it);

}

void

RSA_PSS_PARAMS_free(RSA_PSS_PARAMS *a)

{

  ASN1_item_free((ASN1_VALUE *)a, &RSA_PSS_PARAMS_it);

}

static int

rsa_oaep_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, void *exarg)

{

  /* Free up maskHash */

  if (operation == ASN1_OP_FREE_PRE) {

    RSA_OAEP_PARAMS *oaep = (RSA_OAEP_PARAMS *)*pval;

    X509_ALGOR_free(oaep->maskHash);

  }

  return 1;

}

static const ASN1_AUX RSA_OAEP_PARAMS_aux = {

  .app_data = NULL,

  .flags = 0,

  .ref_offset = 0,

  .ref_lock = 0,

  .asn1_cb = rsa_oaep_cb,

  .enc_offset = 0,

};

static const ASN1_TEMPLATE RSA_OAEP_PARAMS_seq_tt[] = {

  {

    .flags = ASN1_TFLG_EXPLICIT | ASN1_TFLG_OPTIONAL,

    .tag = 0,

    .offset = offsetof(RSA_OAEP_PARAMS, hashFunc),

    .field_name = "hashFunc",

    .item = &X509_ALGOR_it,

  },

  {

    .flags = ASN1_TFLG_EXPLICIT | ASN1_TFLG_OPTIONAL,

    .tag = 1,

    .offset = offsetof(RSA_OAEP_PARAMS, maskGenFunc),

    .field_name = "maskGenFunc",

    .item = &X509_ALGOR_it,

  },

  {

    .flags = ASN1_TFLG_EXPLICIT | ASN1_TFLG_OPTIONAL,

    .tag = 2,

    .offset = offsetof(RSA_OAEP_PARAMS, pSourceFunc),

    .field_name = "pSourceFunc",

    .item = &X509_ALGOR_it,

  },

};

const ASN1_ITEM RSA_OAEP_PARAMS_it = {

  .itype = ASN1_ITYPE_SEQUENCE,

  .utype = V_ASN1_SEQUENCE,

  .templates = RSA_OAEP_PARAMS_seq_tt,

  .tcount = sizeof(RSA_OAEP_PARAMS_seq_tt) / sizeof(ASN1_TEMPLATE),

  .funcs = &RSA_OAEP_PARAMS_aux,

  .size = sizeof(RSA_OAEP_PARAMS),

  .sname = "RSA_OAEP_PARAMS",

};

RSA_OAEP_PARAMS *

d2i_RSA_OAEP_PARAMS(RSA_OAEP_PARAMS **a, const unsigned char **in, long len)

{

  return (RSA_OAEP_PARAMS *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,

      &RSA_OAEP_PARAMS_it);

}

int

i2d_RSA_OAEP_PARAMS(RSA_OAEP_PARAMS *a, unsigned char **out)

{

  return ASN1_item_i2d((ASN1_VALUE *)a, out, &RSA_OAEP_PARAMS_it);

}

RSA_OAEP_PARAMS *

RSA_OAEP_PARAMS_new(void)

{

  return (RSA_OAEP_PARAMS *)ASN1_item_new(&RSA_OAEP_PARAMS_it);

}

void

RSA_OAEP_PARAMS_free(RSA_OAEP_PARAMS *a)

{

  ASN1_item_free((ASN1_VALUE *)a, &RSA_OAEP_PARAMS_it);

}

RSA *

d2i_RSAPrivateKey(RSA **a, const unsigned char **in, long len)

{

  return (RSA *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,

      &RSAPrivateKey_it);

}

int

i2d_RSAPrivateKey(const RSA *a, unsigned char **out)

{

  return ASN1_item_i2d((ASN1_VALUE *)a, out, &RSAPrivateKey_it);

}

RSA *

d2i_RSAPublicKey(RSA **a, const unsigned char **in, long len)

{

  return (RSA *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,

      &RSAPublicKey_it);

}

int

i2d_RSAPublicKey(const RSA *a, unsigned char **out)

{

  return ASN1_item_i2d((ASN1_VALUE *)a, out, &RSAPublicKey_it);

}

RSA *

RSAPublicKey_dup(RSA *rsa)

{

  return ASN1_item_dup(&RSAPublicKey_it, rsa);

}

RSA *

RSAPrivateKey_dup(RSA *rsa)

{

  return ASN1_item_dup(&RSAPrivateKey_it, rsa);

}