/*

 * Copyright 2008-2026 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 <openssl/asn1t.h>

#include <openssl/x509.h>

#include <openssl/err.h>

#include <openssl/pem.h>

#include <openssl/cms.h>

#include "cms_local.h"

#include <crypto/asn1.h>

/* unfortunately cannot constify BIO_new_NDEF() due to this and PKCS7_stream() */

int CMS_stream(unsigned char ***boundary, CMS_ContentInfo *cms)

{

    ASN1_OCTET_STRING **pos;

    pos = CMS_get0_content(cms);

    if (pos == NULL)

        return 0;

    if (*pos == NULL)

        *pos = ASN1_OCTET_STRING_new();

    if (*pos != NULL) {

        (*pos)->flags |= ASN1_STRING_FLAG_NDEF;

        (*pos)->flags &= ~ASN1_STRING_FLAG_CONT;

        *boundary = &(*pos)->data;

        return 1;

    }

    ERR_raise(ERR_LIB_CMS, ERR_R_CMS_LIB);

    return 0;

}

CMS_ContentInfo *d2i_CMS_bio(BIO *bp, CMS_ContentInfo **cms)

{

    CMS_ContentInfo *ci;

    const CMS_CTX *ctx = ossl_cms_get0_cmsctx(cms == NULL ? NULL : *cms);

    ci = ASN1_item_d2i_bio_ex(ASN1_ITEM_rptr(CMS_ContentInfo), bp, cms,

        ossl_cms_ctx_get0_libctx(ctx),

        ossl_cms_ctx_get0_propq(ctx));

    if (ci != NULL) {

        ERR_set_mark();

        ossl_cms_resolve_libctx(ci);

        ERR_pop_to_mark();

    }

    return ci;

}

int i2d_CMS_bio(BIO *bp, CMS_ContentInfo *cms)

{

    return ASN1_item_i2d_bio(ASN1_ITEM_rptr(CMS_ContentInfo), bp, cms);

}

IMPLEMENT_PEM_rw(CMS, CMS_ContentInfo, PEM_STRING_CMS, CMS_ContentInfo)

Unexecuted instantiation: PEM_write_bio_CMS

Unexecuted instantiation: PEM_write_CMS

BIO *BIO_new_CMS(BIO *out, CMS_ContentInfo *cms)

{

    return BIO_new_NDEF(out, (ASN1_VALUE *)cms,

        ASN1_ITEM_rptr(CMS_ContentInfo));

}

/* CMS wrappers round generalised stream and MIME routines */

int i2d_CMS_bio_stream(BIO *out, CMS_ContentInfo *cms, BIO *in, int flags)

{

    return i2d_ASN1_bio_stream(out, (ASN1_VALUE *)cms, in, flags,

        ASN1_ITEM_rptr(CMS_ContentInfo));

}

int PEM_write_bio_CMS_stream(BIO *out, CMS_ContentInfo *cms, BIO *in,

    int flags)

{

    return PEM_write_bio_ASN1_stream(out, (ASN1_VALUE *)cms, in, flags,

        "CMS", ASN1_ITEM_rptr(CMS_ContentInfo));

}

int SMIME_write_CMS(BIO *bio, CMS_ContentInfo *cms, BIO *data, int flags)

{

    STACK_OF(X509_ALGOR) *mdalgs;

    int ctype_nid = OBJ_obj2nid(cms->contentType);

    int econt_nid = OBJ_obj2nid(CMS_get0_eContentType(cms));

    const CMS_CTX *ctx = ossl_cms_get0_cmsctx(cms);

    if (ctype_nid == NID_pkcs7_signed)

        mdalgs = cms->d.signedData->digestAlgorithms;

    else

        mdalgs = NULL;

    return SMIME_write_ASN1_ex(bio, (ASN1_VALUE *)cms, data, flags, ctype_nid,

        econt_nid, mdalgs,

        ASN1_ITEM_rptr(CMS_ContentInfo),

        ossl_cms_ctx_get0_libctx(ctx),

        ossl_cms_ctx_get0_propq(ctx));

}

CMS_ContentInfo *SMIME_read_CMS_ex(BIO *bio, int flags, BIO **bcont,

    CMS_ContentInfo **cms)

{

    CMS_ContentInfo *ci;

    const CMS_CTX *ctx = ossl_cms_get0_cmsctx(cms == NULL ? NULL : *cms);

    ci = (CMS_ContentInfo *)SMIME_read_ASN1_ex(bio, flags, bcont,

        ASN1_ITEM_rptr(CMS_ContentInfo),

        (ASN1_VALUE **)cms,

        ossl_cms_ctx_get0_libctx(ctx),

        ossl_cms_ctx_get0_propq(ctx));

    if (ci != NULL) {

        ERR_set_mark();

        ossl_cms_resolve_libctx(ci);

        ERR_pop_to_mark();

    }

    return ci;

}

CMS_ContentInfo *SMIME_read_CMS(BIO *bio, BIO **bcont)

{

    return SMIME_read_CMS_ex(bio, 0, bcont, NULL);

}