/*

 * Copyright 1999-2016 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/pkcs12.h>

#include "p12_lcl.h"

/* Pack an object into an OCTET STRING and turn into a safebag */

PKCS12_SAFEBAG *PKCS12_item_pack_safebag(void *obj, const ASN1_ITEM *it,

                                         int nid1, int nid2)

{

    PKCS12_BAGS *bag;

    PKCS12_SAFEBAG *safebag;

    if ((bag = PKCS12_BAGS_new()) == NULL) {

        PKCS12err(PKCS12_F_PKCS12_ITEM_PACK_SAFEBAG, ERR_R_MALLOC_FAILURE);

        return NULL;

    }

    bag->type = OBJ_nid2obj(nid1);

    if (!ASN1_item_pack(obj, it, &bag->value.octet)) {

        PKCS12err(PKCS12_F_PKCS12_ITEM_PACK_SAFEBAG, ERR_R_MALLOC_FAILURE);

        goto err;

    }

    if ((safebag = PKCS12_SAFEBAG_new()) == NULL) {

        PKCS12err(PKCS12_F_PKCS12_ITEM_PACK_SAFEBAG, ERR_R_MALLOC_FAILURE);

        goto err;

    }

    safebag->value.bag = bag;

    safebag->type = OBJ_nid2obj(nid2);

    return safebag;

 err:

    PKCS12_BAGS_free(bag);

    return NULL;

}

/* Turn a stack of SAFEBAGS into a PKCS#7 data Contentinfo */

PKCS7 *PKCS12_pack_p7data(STACK_OF(PKCS12_SAFEBAG) *sk)

{

    PKCS7 *p7;

    if ((p7 = PKCS7_new()) == NULL) {

        PKCS12err(PKCS12_F_PKCS12_PACK_P7DATA, ERR_R_MALLOC_FAILURE);

        return NULL;

    }

    p7->type = OBJ_nid2obj(NID_pkcs7_data);

    if ((p7->d.data = ASN1_OCTET_STRING_new()) == NULL) {

        PKCS12err(PKCS12_F_PKCS12_PACK_P7DATA, ERR_R_MALLOC_FAILURE);

        goto err;

    }

    if (!ASN1_item_pack(sk, ASN1_ITEM_rptr(PKCS12_SAFEBAGS), &p7->d.data)) {

        PKCS12err(PKCS12_F_PKCS12_PACK_P7DATA, PKCS12_R_CANT_PACK_STRUCTURE);

        goto err;

    }

    return p7;

 err:

    PKCS7_free(p7);

    return NULL;

}

/* Unpack SAFEBAGS from PKCS#7 data ContentInfo */

STACK_OF(PKCS12_SAFEBAG) *PKCS12_unpack_p7data(PKCS7 *p7)

{

    if (!PKCS7_type_is_data(p7)) {

        PKCS12err(PKCS12_F_PKCS12_UNPACK_P7DATA,

                  PKCS12_R_CONTENT_TYPE_NOT_DATA);

        return NULL;

    }

    return ASN1_item_unpack(p7->d.data, ASN1_ITEM_rptr(PKCS12_SAFEBAGS));

}

/* Turn a stack of SAFEBAGS into a PKCS#7 encrypted data ContentInfo */

PKCS7 *PKCS12_pack_p7encdata(int pbe_nid, const char *pass, int passlen,

                             unsigned char *salt, int saltlen, int iter,

                             STACK_OF(PKCS12_SAFEBAG) *bags)

{

    PKCS7 *p7;

    X509_ALGOR *pbe;

    const EVP_CIPHER *pbe_ciph;

    if ((p7 = PKCS7_new()) == NULL) {

        PKCS12err(PKCS12_F_PKCS12_PACK_P7ENCDATA, ERR_R_MALLOC_FAILURE);

        return NULL;

    }

    if (!PKCS7_set_type(p7, NID_pkcs7_encrypted)) {

        PKCS12err(PKCS12_F_PKCS12_PACK_P7ENCDATA,

                  PKCS12_R_ERROR_SETTING_ENCRYPTED_DATA_TYPE);

        goto err;

    }

    pbe_ciph = EVP_get_cipherbynid(pbe_nid);

    if (pbe_ciph)

        pbe = PKCS5_pbe2_set(pbe_ciph, iter, salt, saltlen);

    else

        pbe = PKCS5_pbe_set(pbe_nid, iter, salt, saltlen);

    if (!pbe) {

        PKCS12err(PKCS12_F_PKCS12_PACK_P7ENCDATA, ERR_R_MALLOC_FAILURE);

        goto err;

    }

    X509_ALGOR_free(p7->d.encrypted->enc_data->algorithm);

    p7->d.encrypted->enc_data->algorithm = pbe;

    ASN1_OCTET_STRING_free(p7->d.encrypted->enc_data->enc_data);

    if (!(p7->d.encrypted->enc_data->enc_data =

          PKCS12_item_i2d_encrypt(pbe, ASN1_ITEM_rptr(PKCS12_SAFEBAGS), pass,

                                  passlen, bags, 1))) {

        PKCS12err(PKCS12_F_PKCS12_PACK_P7ENCDATA, PKCS12_R_ENCRYPT_ERROR);

        goto err;

    }

    return p7;

 err:

    PKCS7_free(p7);

    return NULL;

}

STACK_OF(PKCS12_SAFEBAG) *PKCS12_unpack_p7encdata(PKCS7 *p7, const char *pass,

                                                  int passlen)

{

    if (!PKCS7_type_is_encrypted(p7))

        return NULL;

    return PKCS12_item_decrypt_d2i(p7->d.encrypted->enc_data->algorithm,

                                   ASN1_ITEM_rptr(PKCS12_SAFEBAGS),

                                   pass, passlen,

                                   p7->d.encrypted->enc_data->enc_data, 1);

}

PKCS8_PRIV_KEY_INFO *PKCS12_decrypt_skey(const PKCS12_SAFEBAG *bag,

                                         const char *pass, int passlen)

{

    return PKCS8_decrypt(bag->value.shkeybag, pass, passlen);

}

int PKCS12_pack_authsafes(PKCS12 *p12, STACK_OF(PKCS7) *safes)

{

    if (ASN1_item_pack(safes, ASN1_ITEM_rptr(PKCS12_AUTHSAFES),

                       &p12->authsafes->d.data))

        return 1;

    return 0;

}

STACK_OF(PKCS7) *PKCS12_unpack_authsafes(const PKCS12 *p12)

{

    if (!PKCS7_type_is_data(p12->authsafes)) {

        PKCS12err(PKCS12_F_PKCS12_UNPACK_AUTHSAFES,

                  PKCS12_R_CONTENT_TYPE_NOT_DATA);

        return NULL;

    }

    return ASN1_item_unpack(p12->authsafes->d.data,

                            ASN1_ITEM_rptr(PKCS12_AUTHSAFES));

}