/*

 * Copyright 2006-2021 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 "internal/cryptlib.h"

#include <openssl/objects.h>

#include <openssl/ts.h>

#include "ts_local.h"

TS_VERIFY_CTX *TS_VERIFY_CTX_new(void)

{

    TS_VERIFY_CTX *ctx = OPENSSL_zalloc(sizeof(*ctx));

    if (ctx == NULL)

        ERR_raise(ERR_LIB_TS, ERR_R_MALLOC_FAILURE);

    return ctx;

}

void TS_VERIFY_CTX_init(TS_VERIFY_CTX *ctx)

{

    OPENSSL_assert(ctx != NULL);

    memset(ctx, 0, sizeof(*ctx));

}

void TS_VERIFY_CTX_free(TS_VERIFY_CTX *ctx)

{

    if (!ctx)

        return;

    TS_VERIFY_CTX_cleanup(ctx);

    OPENSSL_free(ctx);

}

int TS_VERIFY_CTX_add_flags(TS_VERIFY_CTX *ctx, int f)

{

    ctx->flags |= f;

    return ctx->flags;

}

int TS_VERIFY_CTX_set_flags(TS_VERIFY_CTX *ctx, int f)

{

    ctx->flags = f;

    return ctx->flags;

}

BIO *TS_VERIFY_CTX_set_data(TS_VERIFY_CTX *ctx, BIO *b)

{

    ctx->data = b;

    return ctx->data;

}

X509_STORE *TS_VERIFY_CTX_set_store(TS_VERIFY_CTX *ctx, X509_STORE *s)

{

    ctx->store = s;

    return ctx->store;

}

STACK_OF(X509) *TS_VERIFY_CTX_set_certs(TS_VERIFY_CTX *ctx,

                                        STACK_OF(X509) *certs)

{

    ctx->certs = certs;

    return ctx->certs;

}

unsigned char *TS_VERIFY_CTX_set_imprint(TS_VERIFY_CTX *ctx,

                                         unsigned char *hexstr, long len)

{

    OPENSSL_free(ctx->imprint);

    ctx->imprint = hexstr;

    ctx->imprint_len = len;

    return ctx->imprint;

}

void TS_VERIFY_CTX_cleanup(TS_VERIFY_CTX *ctx)

{

    if (!ctx)

        return;

    X509_STORE_free(ctx->store);

    sk_X509_pop_free(ctx->certs, X509_free);

    ASN1_OBJECT_free(ctx->policy);

    X509_ALGOR_free(ctx->md_alg);

    OPENSSL_free(ctx->imprint);

    BIO_free_all(ctx->data);

    ASN1_INTEGER_free(ctx->nonce);

    GENERAL_NAME_free(ctx->tsa_name);

    TS_VERIFY_CTX_init(ctx);

}

TS_VERIFY_CTX *TS_REQ_to_TS_VERIFY_CTX(TS_REQ *req, TS_VERIFY_CTX *ctx)

{

    TS_VERIFY_CTX *ret = ctx;

    ASN1_OBJECT *policy;

    TS_MSG_IMPRINT *imprint;

    X509_ALGOR *md_alg;

    ASN1_OCTET_STRING *msg;

    const ASN1_INTEGER *nonce;

    OPENSSL_assert(req != NULL);

    if (ret)

        TS_VERIFY_CTX_cleanup(ret);

    else if ((ret = TS_VERIFY_CTX_new()) == NULL)

        return NULL;

    ret->flags = TS_VFY_ALL_IMPRINT & ~(TS_VFY_TSA_NAME | TS_VFY_SIGNATURE);

    if ((policy = req->policy_id) != NULL) {

        if ((ret->policy = OBJ_dup(policy)) == NULL)

            goto err;

    } else

        ret->flags &= ~TS_VFY_POLICY;

    imprint = req->msg_imprint;

    md_alg = imprint->hash_algo;

    if ((ret->md_alg = X509_ALGOR_dup(md_alg)) == NULL)

        goto err;

    msg = imprint->hashed_msg;

    ret->imprint_len = ASN1_STRING_length(msg);

    if (ret->imprint_len <= 0)

        goto err;

    if ((ret->imprint = OPENSSL_malloc(ret->imprint_len)) == NULL)

        goto err;

    memcpy(ret->imprint, ASN1_STRING_get0_data(msg), ret->imprint_len);

    if ((nonce = req->nonce) != NULL) {

        if ((ret->nonce = ASN1_INTEGER_dup(nonce)) == NULL)

            goto err;

    } else

        ret->flags &= ~TS_VFY_NONCE;

    return ret;

 err:

    if (ctx)

        TS_VERIFY_CTX_cleanup(ctx);

    else

        TS_VERIFY_CTX_free(ret);

    return NULL;

}