/*

 * Copyright 1999-2021 The OpenSSL Project Authors. All Rights Reserved.

 *

 * Licensed under the Apache License 2.0 (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/core.h>

#include <openssl/core_names.h>

#include <openssl/pkcs12.h>

#include "p12_local.h"

#include "crypto/pkcs7/pk7_local.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) {

        ERR_raise(ERR_LIB_PKCS12, ERR_R_MALLOC_FAILURE);

        return NULL;

    }

    bag->type = OBJ_nid2obj(nid1);

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

        ERR_raise(ERR_LIB_PKCS12, ERR_R_MALLOC_FAILURE);

        goto err;

    }

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

        ERR_raise(ERR_LIB_PKCS12, 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) {

        ERR_raise(ERR_LIB_PKCS12, ERR_R_MALLOC_FAILURE);

        return NULL;

    }

    p7->type = OBJ_nid2obj(NID_pkcs7_data);

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

        ERR_raise(ERR_LIB_PKCS12, ERR_R_MALLOC_FAILURE);

        goto err;

    }

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

        ERR_raise(ERR_LIB_PKCS12, 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)) {

        ERR_raise(ERR_LIB_PKCS12, 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_ex(int pbe_nid, const char *pass, int passlen,

                                unsigned char *salt, int saltlen, int iter,

                                STACK_OF(PKCS12_SAFEBAG) *bags,

                                OSSL_LIB_CTX *ctx, const char *propq)

{

    PKCS7 *p7;

    X509_ALGOR *pbe;

    const EVP_CIPHER *pbe_ciph = NULL;

    EVP_CIPHER *pbe_ciph_fetch = NULL;

    if ((p7 = PKCS7_new_ex(ctx, propq)) == NULL) {

        ERR_raise(ERR_LIB_PKCS12, ERR_R_MALLOC_FAILURE);

        return NULL;

    }

    if (!PKCS7_set_type(p7, NID_pkcs7_encrypted)) {

        ERR_raise(ERR_LIB_PKCS12, PKCS12_R_ERROR_SETTING_ENCRYPTED_DATA_TYPE);

        goto err;

    }

    ERR_set_mark();

    pbe_ciph = pbe_ciph_fetch = EVP_CIPHER_fetch(ctx, OBJ_nid2sn(pbe_nid), propq);

    if (pbe_ciph == NULL)

        pbe_ciph = EVP_get_cipherbynid(pbe_nid);

    ERR_pop_to_mark();

    if (pbe_ciph != NULL) {

        pbe = PKCS5_pbe2_set_iv_ex(pbe_ciph, iter, salt, saltlen, NULL, -1, ctx);

    } else {

        pbe = PKCS5_pbe_set_ex(pbe_nid, iter, salt, saltlen, ctx);

    }

    if (pbe == NULL) {

        ERR_raise(ERR_LIB_PKCS12, 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_ex(pbe, ASN1_ITEM_rptr(PKCS12_SAFEBAGS), pass,

                                     passlen, bags, 1, ctx, propq))) {

        ERR_raise(ERR_LIB_PKCS12, PKCS12_R_ENCRYPT_ERROR);

        goto err;

    }

    EVP_CIPHER_free(pbe_ciph_fetch);

    return p7;

 err:

    PKCS7_free(p7);

    EVP_CIPHER_free(pbe_ciph_fetch);

    return NULL;

}

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

                             unsigned char *salt, int saltlen, int iter,

                             STACK_OF(PKCS12_SAFEBAG) *bags)

{

    return PKCS12_pack_p7encdata_ex(pbe_nid, pass, passlen, salt, saltlen,

                                    iter, bags, NULL, 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_ex(p7->d.encrypted->enc_data->algorithm,

                                   ASN1_ITEM_rptr(PKCS12_SAFEBAGS),

                                   pass, passlen,

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

                                   p7->ctx.libctx, p7->ctx.propq);

}

PKCS8_PRIV_KEY_INFO *PKCS12_decrypt_skey_ex(const PKCS12_SAFEBAG *bag,

                                            const char *pass, int passlen,

                                            OSSL_LIB_CTX *ctx, const char *propq)

{

    return PKCS8_decrypt_ex(bag->value.shkeybag, pass, passlen, ctx, propq);

}

PKCS8_PRIV_KEY_INFO *PKCS12_decrypt_skey(const PKCS12_SAFEBAG *bag,

                                         const char *pass, int passlen)

{

    return PKCS12_decrypt_skey_ex(bag, pass, passlen, NULL, NULL);

}

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)

{

    STACK_OF(PKCS7) *p7s;

    PKCS7 *p7;

    int i;

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

        ERR_raise(ERR_LIB_PKCS12, PKCS12_R_CONTENT_TYPE_NOT_DATA);

        return NULL;

    }

    p7s = ASN1_item_unpack(p12->authsafes->d.data,

                           ASN1_ITEM_rptr(PKCS12_AUTHSAFES));

    if (p7s != NULL) {

        for (i = 0; i < sk_PKCS7_num(p7s); i++) {

            p7 = sk_PKCS7_value(p7s, i);

            if (!ossl_pkcs7_ctx_propagate(p12->authsafes, p7))

                goto err;

        }

    }

    return p7s;

err:

    sk_PKCS7_free(p7s);

    return NULL;

}