/* $OpenBSD: cms_smime.c,v 1.31 2025/11/28 06:07:09 tb Exp $ */
/*
 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
 * project.
 */
/* ====================================================================
 * Copyright (c) 2008 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,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 */

#include <sys/types.h>

#include <stddef.h>

#include <openssl/asn1.h>
#include <openssl/bio.h>
#include <openssl/cms.h>
#include <openssl/evp.h>
#include <openssl/objects.h>
#include <openssl/pkcs7.h>
#include <openssl/x509.h>
#include <openssl/x509_vfy.h>

#include "cms_local.h"
#include "err_local.h"

static BIO *
cms_get_text_bio(BIO *out, unsigned int flags)
{
        BIO *rbio;

        if (out == NULL)
                rbio = BIO_new(BIO_s_null());
        else if (flags & CMS_TEXT) {
                rbio = BIO_new(BIO_s_mem());
                BIO_set_mem_eof_return(rbio, 0);
        } else
                rbio = out;

        return rbio;
}

static int
cms_copy_content(BIO *out, BIO *in, unsigned int flags)
{
        unsigned char buf[4096];
        int r = 0, i;
        BIO *tmpout;

        tmpout = cms_get_text_bio(out, flags);

        if (tmpout == NULL) {
                CMSerror(ERR_R_MALLOC_FAILURE);
                goto err;
        }

        /* Read all content through chain to process digest, decrypt etc */
        for (;;) {
                i = BIO_read(in, buf, sizeof(buf));
                if (i <= 0) {
                        if (BIO_method_type(in) == BIO_TYPE_CIPHER) {
                                if (!BIO_get_cipher_status(in))
                                        goto err;
                        }
                        if (i < 0)
                                goto err;
                        break;
                }

                if (tmpout && (BIO_write(tmpout, buf, i) != i))
                        goto err;
        }

        if (flags & CMS_TEXT) {
                if (!SMIME_text(tmpout, out)) {
                        CMSerror(CMS_R_SMIME_TEXT_ERROR);
                        goto err;
                }
        }

        r = 1;

 err:
        if (tmpout != out)
                BIO_free(tmpout);

        return r;
}

static int
check_content(CMS_ContentInfo *cms)
{
        ASN1_OCTET_STRING **pos = CMS_get0_content(cms);

        if (!pos || !*pos) {
                CMSerror(CMS_R_NO_CONTENT);
                return 0;
        }

        return 1;
}

static void
do_free_upto(BIO *f, BIO *upto)
{
        if (upto) {
                BIO *tbio;
                do {
                        tbio = BIO_pop(f);
                        BIO_free(f);
                        f = tbio;
                }
                while (f && f != upto);
        } else
                BIO_free_all(f);
}

int
CMS_data(CMS_ContentInfo *cms, BIO *out, unsigned int flags)
{
        BIO *cont;
        int r;

        if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_data) {
                CMSerror(CMS_R_TYPE_NOT_DATA);
                return 0;
        }
        cont = CMS_dataInit(cms, NULL);
        if (!cont)
                return 0;
        r = cms_copy_content(out, cont, flags);
        BIO_free_all(cont);

        return r;
}
LCRYPTO_ALIAS(CMS_data);

CMS_ContentInfo *
CMS_data_create(BIO *in, unsigned int flags)
{
        CMS_ContentInfo *cms;

        cms = cms_Data_create();
        if (!cms)
                return NULL;

        if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
                return cms;

        CMS_ContentInfo_free(cms);

        return NULL;
}
LCRYPTO_ALIAS(CMS_data_create);

int
CMS_digest_verify(CMS_ContentInfo *cms, BIO *dcont, BIO *out, unsigned int flags)
{
        BIO *cont;
        int r;

        if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_digest) {
                CMSerror(CMS_R_TYPE_NOT_DIGESTED_DATA);
                return 0;
        }

        if (!dcont && !check_content(cms))
                return 0;

        cont = CMS_dataInit(cms, dcont);
        if (!cont)
                return 0;
        r = cms_copy_content(out, cont, flags);
        if (r)
                r = cms_DigestedData_do_final(cms, cont, 1);
        do_free_upto(cont, dcont);

        return r;
}
LCRYPTO_ALIAS(CMS_digest_verify);

CMS_ContentInfo *
CMS_digest_create(BIO *in, const EVP_MD *md, unsigned int flags)
{
        CMS_ContentInfo *cms;

        if (!md)
                md = EVP_sha1();
        cms = cms_DigestedData_create(md);
        if (!cms)
                return NULL;

        if (!(flags & CMS_DETACHED))
                CMS_set_detached(cms, 0);

        if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
                return cms;

        CMS_ContentInfo_free(cms);

        return NULL;
}
LCRYPTO_ALIAS(CMS_digest_create);

int
CMS_EncryptedData_decrypt(CMS_ContentInfo *cms, const unsigned char *key,
    size_t keylen, BIO *dcont, BIO *out, unsigned int flags)
{
        BIO *cont;
        int r;

        if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_encrypted) {
                CMSerror(CMS_R_TYPE_NOT_ENCRYPTED_DATA);
                return 0;
        }

        if (!dcont && !check_content(cms))
                return 0;

        if (CMS_EncryptedData_set1_key(cms, NULL, key, keylen) <= 0)
                return 0;
        cont = CMS_dataInit(cms, dcont);
        if (!cont)
                return 0;
        r = cms_copy_content(out, cont, flags);
        do_free_upto(cont, dcont);

        return r;
}
LCRYPTO_ALIAS(CMS_EncryptedData_decrypt);

CMS_ContentInfo *
CMS_EncryptedData_encrypt(BIO *in, const EVP_CIPHER *cipher,
    const unsigned char *key, size_t keylen, unsigned int flags)
{
        CMS_ContentInfo *cms = NULL;

        if (cipher == NULL) {
                CMSerror(CMS_R_NO_CIPHER);
                goto err;
        }

        if ((cms = CMS_ContentInfo_new()) == NULL)
                goto err;

        if (!CMS_EncryptedData_set1_key(cms, cipher, key, keylen))
                goto err;

        if ((flags & CMS_DETACHED) == 0) {
                if (!CMS_set_detached(cms, 0))
                        goto err;
        }

        if ((flags & (CMS_STREAM | CMS_PARTIAL)) == 0) {
                if (!CMS_final(cms, in, NULL, flags))
                        goto err;
        }

        return cms;

 err:
        CMS_ContentInfo_free(cms);

        return NULL;
}
LCRYPTO_ALIAS(CMS_EncryptedData_encrypt);

static int
cms_signerinfo_verify_cert(CMS_SignerInfo *si, X509_STORE *store,
    STACK_OF(X509) *certs, STACK_OF(X509_CRL) *crls)
{
        X509_STORE_CTX *ctx = X509_STORE_CTX_new();
        X509 *signer;
        int i, j, r = 0;

        if (ctx == NULL) {
                CMSerror(ERR_R_MALLOC_FAILURE);
                goto err;
        }
        CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
        if (!X509_STORE_CTX_init(ctx, store, signer, certs)) {
                CMSerror(CMS_R_STORE_INIT_ERROR);
                goto err;
        }
        X509_STORE_CTX_set_default(ctx, "smime_sign");
        if (crls)
                X509_STORE_CTX_set0_crls(ctx, crls);

        i = X509_verify_cert(ctx);
        if (i <= 0) {
                j = X509_STORE_CTX_get_error(ctx);
                CMSerror(CMS_R_CERTIFICATE_VERIFY_ERROR);
                ERR_asprintf_error_data("Verify error: %s",
                    X509_verify_cert_error_string(j));
                goto err;
        }
        r = 1;

 err:
        X509_STORE_CTX_free(ctx);

        return r;
}

int
CMS_verify(CMS_ContentInfo *cms, STACK_OF(X509) *certs, X509_STORE *store,
    BIO *dcont, BIO *out, unsigned int flags)
{
        CMS_SignerInfo *si;
        STACK_OF(CMS_SignerInfo) *sinfos;
        STACK_OF(X509) *cms_certs = NULL;
        STACK_OF(X509_CRL) *crls = NULL;
        X509 *signer;
        int i, scount = 0, ret = 0;
        BIO *cmsbio = NULL, *tmpin = NULL, *tmpout = NULL;

        if (!dcont && !check_content(cms))
                return 0;
        if (dcont && !(flags & CMS_BINARY)) {
                const ASN1_OBJECT *coid = CMS_get0_eContentType(cms);
                if (OBJ_obj2nid(coid) == NID_id_ct_asciiTextWithCRLF)
                        flags |= CMS_ASCIICRLF;
        }

        /* Attempt to find all signer certificates */

        sinfos = CMS_get0_SignerInfos(cms);
        if (sk_CMS_SignerInfo_num(sinfos) <= 0) {
                CMSerror(CMS_R_NO_SIGNERS);
                goto err;
        }

        for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
                si = sk_CMS_SignerInfo_value(sinfos, i);
                CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
                if (signer)
                        scount++;
        }

        if (scount != sk_CMS_SignerInfo_num(sinfos))
                scount += CMS_set1_signers_certs(cms, certs, flags);

        if (scount != sk_CMS_SignerInfo_num(sinfos)) {
                CMSerror(CMS_R_SIGNER_CERTIFICATE_NOT_FOUND);
                goto err;
        }

        /* Attempt to verify all signers certs */

        if (!(flags & CMS_NO_SIGNER_CERT_VERIFY)) {
                cms_certs = CMS_get1_certs(cms);
                if (!(flags & CMS_NOCRL))
                        crls = CMS_get1_crls(cms);
                for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
                        si = sk_CMS_SignerInfo_value(sinfos, i);
                        if (!cms_signerinfo_verify_cert(si, store, cms_certs, crls))
                                goto err;
                }
        }

        /* Attempt to verify all SignerInfo signed attribute signatures */

        if (!(flags & CMS_NO_ATTR_VERIFY)) {
                for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
                        si = sk_CMS_SignerInfo_value(sinfos, i);
                        if (CMS_signed_get_attr_count(si) < 0)
                                continue;
                        if (CMS_SignerInfo_verify(si) <= 0)
                                goto err;
                }
        }

        /*
         * Performance optimization: if the content is a memory BIO then store
         * its contents in a temporary read only memory BIO. This avoids
         * potentially large numbers of slow copies of data which will occur when
         * reading from a read write memory BIO when signatures are calculated.
         */

        if (dcont && (BIO_method_type(dcont) == BIO_TYPE_MEM)) {
                char *ptr;
                long len;

                len = BIO_get_mem_data(dcont, &ptr);
                tmpin = BIO_new_mem_buf(ptr, len);
                if (tmpin == NULL) {
                        CMSerror(ERR_R_MALLOC_FAILURE);
                        goto err2;
                }
        } else
                tmpin = dcont;

        /*
         * If not binary mode and detached generate digests by *writing* through
         * the BIO. That makes it possible to canonicalise the input.
         */
        if (!(flags & SMIME_BINARY) && dcont) {
                /*
                 * Create output BIO so we can either handle text or to ensure
                 * included content doesn't override detached content.
                 */
                tmpout = cms_get_text_bio(out, flags);
                if (!tmpout) {
                        CMSerror(ERR_R_MALLOC_FAILURE);
                        goto err;
                }
                cmsbio = CMS_dataInit(cms, tmpout);
                if (!cmsbio)
                        goto err;
                /*
                 * Don't use SMIME_TEXT for verify: it adds headers and we want to
                 * remove them.
                 */
                SMIME_crlf_copy(dcont, cmsbio, flags & ~SMIME_TEXT);

                if (flags & CMS_TEXT) {
                        if (!SMIME_text(tmpout, out)) {
                                CMSerror(CMS_R_SMIME_TEXT_ERROR);
                                goto err;
                        }
                }
        } else {
                cmsbio = CMS_dataInit(cms, tmpin);
                if (!cmsbio)
                        goto err;

                if (!cms_copy_content(out, cmsbio, flags))
                        goto err;

        }
        if (!(flags & CMS_NO_CONTENT_VERIFY)) {
                for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
                        si = sk_CMS_SignerInfo_value(sinfos, i);
                        if (CMS_SignerInfo_verify_content(si, cmsbio) <= 0) {
                                CMSerror(CMS_R_CONTENT_VERIFY_ERROR);
                                goto err;
                        }
                }
        }

        ret = 1;

 err:
        if (!(flags & SMIME_BINARY) && dcont) {
                do_free_upto(cmsbio, tmpout);
                if (tmpin != dcont)
                        BIO_free(tmpin);
        } else {
                if (dcont && (tmpin == dcont))
                        do_free_upto(cmsbio, dcont);
                else
                        BIO_free_all(cmsbio);
        }

        if (out != tmpout)
                BIO_free_all(tmpout);

 err2:
        sk_X509_pop_free(cms_certs, X509_free);
        sk_X509_CRL_pop_free(crls, X509_CRL_free);

        return ret;
}
LCRYPTO_ALIAS(CMS_verify);

int
CMS_verify_receipt(CMS_ContentInfo *rcms, CMS_ContentInfo *ocms,
    STACK_OF(X509) *certs, X509_STORE *store, unsigned int flags)
{
        int r;

        flags &= ~(CMS_DETACHED | CMS_TEXT);
        r = CMS_verify(rcms, certs, store, NULL, NULL, flags);
        if (r <= 0)
                return r;

        return cms_Receipt_verify(rcms, ocms);
}
LCRYPTO_ALIAS(CMS_verify_receipt);

CMS_ContentInfo *
CMS_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs, BIO *data,
    unsigned int flags)
{
        CMS_ContentInfo *cms;
        int i;

        cms = CMS_ContentInfo_new();
        if (cms == NULL || !CMS_SignedData_init(cms))
                goto merr;
        if (flags & CMS_ASCIICRLF &&
            !CMS_set1_eContentType(cms, OBJ_nid2obj(NID_id_ct_asciiTextWithCRLF)))
                goto err;

        if (pkey && !CMS_add1_signer(cms, signcert, pkey, NULL, flags)) {
                CMSerror(CMS_R_ADD_SIGNER_ERROR);
                goto err;
        }

        for (i = 0; i < sk_X509_num(certs); i++) {
                X509 *x = sk_X509_value(certs, i);
                if (!CMS_add1_cert(cms, x))
                        goto merr;
        }

        if (!(flags & CMS_DETACHED))
                CMS_set_detached(cms, 0);

        if ((flags & (CMS_STREAM | CMS_PARTIAL)) ||
            CMS_final(cms, data, NULL, flags))
                return cms;
        else
                goto err;

 merr:
        CMSerror(ERR_R_MALLOC_FAILURE);

 err:
        CMS_ContentInfo_free(cms);

        return NULL;
}
LCRYPTO_ALIAS(CMS_sign);

CMS_ContentInfo *
CMS_sign_receipt(CMS_SignerInfo *si, X509 *signcert, EVP_PKEY *pkey,
    STACK_OF(X509) *certs, unsigned int flags)
{
        CMS_SignerInfo *rct_si;
        CMS_ContentInfo *cms = NULL;
        ASN1_OCTET_STRING **pos, *os;
        BIO *rct_cont = NULL;
        int r = 0;

        flags &= ~(CMS_STREAM | CMS_TEXT);
        /* Not really detached but avoids content being allocated */
        flags |= CMS_PARTIAL | CMS_BINARY | CMS_DETACHED;
        if (!pkey || !signcert) {
                CMSerror(CMS_R_NO_KEY_OR_CERT);
                return NULL;
        }

        /* Initialize signed data */

        cms = CMS_sign(NULL, NULL, certs, NULL, flags);
        if (!cms)
                goto err;

        /* Set inner content type to signed receipt */
        if (!CMS_set1_eContentType(cms, OBJ_nid2obj(NID_id_smime_ct_receipt)))
                goto err;

        rct_si = CMS_add1_signer(cms, signcert, pkey, NULL, flags);
        if (!rct_si) {
                CMSerror(CMS_R_ADD_SIGNER_ERROR);
                goto err;
        }

        os = cms_encode_Receipt(si);
        if (!os)
                goto err;

        /* Set content to digest */
        rct_cont = BIO_new_mem_buf(os->data, os->length);
        if (!rct_cont)
                goto err;

        /* Add msgSigDigest attribute */

        if (!cms_msgSigDigest_add1(rct_si, si))
                goto err;

        /* Finalize structure */
        if (!CMS_final(cms, rct_cont, NULL, flags))
                goto err;

        /* Set embedded content */
        pos = CMS_get0_content(cms);
        *pos = os;

        r = 1;

 err:
        BIO_free(rct_cont);
        if (r)
                return cms;
        CMS_ContentInfo_free(cms);

        return NULL;
}
LCRYPTO_ALIAS(CMS_sign_receipt);

CMS_ContentInfo *
CMS_encrypt(STACK_OF(X509) *certs, BIO *data, const EVP_CIPHER *cipher,
    unsigned int flags)
{
        CMS_ContentInfo *cms;
        int i;
        X509 *recip;

        cms = CMS_EnvelopedData_create(cipher);
        if (!cms)
                goto merr;
        for (i = 0; i < sk_X509_num(certs); i++) {
                recip = sk_X509_value(certs, i);
                if (!CMS_add1_recipient_cert(cms, recip, flags)) {
                        CMSerror(CMS_R_RECIPIENT_ERROR);
                        goto err;
                }
        }

        if (!(flags & CMS_DETACHED))
                CMS_set_detached(cms, 0);

        if ((flags & (CMS_STREAM | CMS_PARTIAL)) ||
            CMS_final(cms, data, NULL, flags))
                return cms;
        else
                goto err;

 merr:
        CMSerror(ERR_R_MALLOC_FAILURE);
 err:
        CMS_ContentInfo_free(cms);

        return NULL;
}
LCRYPTO_ALIAS(CMS_encrypt);

static int
cms_kari_set1_pkey(CMS_ContentInfo *cms, CMS_RecipientInfo *ri, EVP_PKEY *pk,
    X509 *cert)
{
        int i;
        STACK_OF(CMS_RecipientEncryptedKey) *reks;
        CMS_RecipientEncryptedKey *rek;

        reks = CMS_RecipientInfo_kari_get0_reks(ri);
        for (i = 0; i < sk_CMS_RecipientEncryptedKey_num(reks); i++) {
                int rv;

                rek = sk_CMS_RecipientEncryptedKey_value(reks, i);
                if (cert != NULL && CMS_RecipientEncryptedKey_cert_cmp(rek, cert))
                        continue;
                CMS_RecipientInfo_kari_set0_pkey(ri, pk);
                rv = CMS_RecipientInfo_kari_decrypt(cms, ri, rek);
                CMS_RecipientInfo_kari_set0_pkey(ri, NULL);
                if (rv > 0)
                        return 1;
                return cert == NULL ? 0 : -1;
        }

        return 0;
}

int
CMS_decrypt_set1_pkey(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert)
{
        STACK_OF(CMS_RecipientInfo) *ris;
        CMS_RecipientInfo *ri;
        int i, r, ri_type;
        int debug = 0, match_ri = 0;

        ris = CMS_get0_RecipientInfos(cms);
        if (ris)
                debug = cms->d.envelopedData->encryptedContentInfo->debug;
        ri_type = cms_pkey_get_ri_type(pk);
        if (ri_type == CMS_RECIPINFO_NONE) {
                CMSerror(CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
                return 0;
        }

        for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++) {
                ri = sk_CMS_RecipientInfo_value(ris, i);
                if (CMS_RecipientInfo_type(ri) != ri_type)
                        continue;
                match_ri = 1;
                if (ri_type == CMS_RECIPINFO_AGREE) {
                        r = cms_kari_set1_pkey(cms, ri, pk, cert);
                        if (r > 0)
                                return 1;
                        if (r < 0)
                                return 0;
                }
                /*
                 * If we have a cert try matching RecipientInfo otherwise try them
                 * all.
                 */
                else if (!cert || !CMS_RecipientInfo_ktri_cert_cmp(ri, cert)) {
                        EVP_PKEY_up_ref(pk);
                        CMS_RecipientInfo_set0_pkey(ri, pk);
                        r = CMS_RecipientInfo_decrypt(cms, ri);
                        CMS_RecipientInfo_set0_pkey(ri, NULL);
                        if (cert) {
                                /*
                                 * If not debugging clear any error and return success to
                                 * avoid leaking of information useful to MMA
                                 */
                                if (!debug) {
                                        ERR_clear_error();
                                        return 1;
                                }
                                if (r > 0)
                                        return 1;
                                CMSerror(CMS_R_DECRYPT_ERROR);
                                return 0;
                        }
                        /*
                         * If no cert and not debugging don't leave loop after first
                         * successful decrypt. Always attempt to decrypt all recipients
                         * to avoid leaking timing of a successful decrypt.
                         */
                        else if (r > 0 && debug)
                                return 1;
                }
        }
        /* If no cert, key transport and not debugging always return success */
        if (cert == NULL && ri_type == CMS_RECIPINFO_TRANS && match_ri && !debug) {
                ERR_clear_error();
                return 1;
        }

        CMSerror(CMS_R_NO_MATCHING_RECIPIENT);

        return 0;
}
LCRYPTO_ALIAS(CMS_decrypt_set1_pkey);

int
CMS_decrypt_set1_key(CMS_ContentInfo *cms, unsigned char *key, size_t keylen,
    const unsigned char *id, size_t idlen)
{
        STACK_OF(CMS_RecipientInfo) *ris;
        CMS_RecipientInfo *ri;
        int i, r;

        ris = CMS_get0_RecipientInfos(cms);
        for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++) {
                ri = sk_CMS_RecipientInfo_value(ris, i);
                if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_KEK)
                        continue;

                /*
                 * If we have an id try matching RecipientInfo otherwise try them
                 * all.
                 */
                if (!id || (CMS_RecipientInfo_kekri_id_cmp(ri, id, idlen) == 0)) {
                        CMS_RecipientInfo_set0_key(ri, key, keylen);
                        r = CMS_RecipientInfo_decrypt(cms, ri);
                        CMS_RecipientInfo_set0_key(ri, NULL, 0);
                        if (r > 0)
                                return 1;
                        if (id) {
                                CMSerror(CMS_R_DECRYPT_ERROR);
                                return 0;
                        }
                        ERR_clear_error();
                }
        }

        CMSerror(CMS_R_NO_MATCHING_RECIPIENT);

        return 0;
}
LCRYPTO_ALIAS(CMS_decrypt_set1_key);

int
CMS_decrypt_set1_password(CMS_ContentInfo *cms, unsigned char *pass,
    ssize_t passlen)
{
        STACK_OF(CMS_RecipientInfo) *ris;
        CMS_RecipientInfo *ri;
        int i, r;

        ris = CMS_get0_RecipientInfos(cms);
        for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++) {
                ri = sk_CMS_RecipientInfo_value(ris, i);
                if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_PASS)
                        continue;
                CMS_RecipientInfo_set0_password(ri, pass, passlen);
                r = CMS_RecipientInfo_decrypt(cms, ri);
                CMS_RecipientInfo_set0_password(ri, NULL, 0);
                if (r > 0)
                        return 1;
        }

        CMSerror(CMS_R_NO_MATCHING_RECIPIENT);

        return 0;
}
LCRYPTO_ALIAS(CMS_decrypt_set1_password);

int
CMS_decrypt(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert, BIO *dcont,
    BIO *out, unsigned int flags)
{
        int r;
        BIO *cont;

        if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_enveloped) {
                CMSerror(CMS_R_TYPE_NOT_ENVELOPED_DATA);
                return 0;
        }
        if (!dcont && !check_content(cms))
                return 0;
        if (flags & CMS_DEBUG_DECRYPT)
                cms->d.envelopedData->encryptedContentInfo->debug = 1;
        else
                cms->d.envelopedData->encryptedContentInfo->debug = 0;
        if (!cert)
                cms->d.envelopedData->encryptedContentInfo->havenocert = 1;
        else
                cms->d.envelopedData->encryptedContentInfo->havenocert = 0;
        if (!pk && !cert && !dcont && !out)
                return 1;
        if (pk && !CMS_decrypt_set1_pkey(cms, pk, cert))
                return 0;
        cont = CMS_dataInit(cms, dcont);
        if (!cont)
                return 0;
        r = cms_copy_content(out, cont, flags);
        do_free_upto(cont, dcont);

        return r;
}
LCRYPTO_ALIAS(CMS_decrypt);

int
CMS_final(CMS_ContentInfo *cms, BIO *data, BIO *dcont, unsigned int flags)
{
        BIO *cmsbio;
        int ret = 0;

        if ((cmsbio = CMS_dataInit(cms, dcont)) == NULL) {
                CMSerror(CMS_R_CMS_LIB);
                return 0;
        }

        SMIME_crlf_copy(data, cmsbio, flags);

        (void)BIO_flush(cmsbio);

        if (!CMS_dataFinal(cms, cmsbio)) {
                CMSerror(CMS_R_CMS_DATAFINAL_ERROR);
                goto err;
        }

        ret = 1;

 err:
        do_free_upto(cmsbio, dcont);

        return ret;
}
LCRYPTO_ALIAS(CMS_final);

int
CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out, unsigned int flags)
{
        CMSerror(CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
        return 0;
}
LCRYPTO_ALIAS(CMS_uncompress);

CMS_ContentInfo *
CMS_compress(BIO *in, int comp_nid, unsigned int flags)
{
        CMSerror(CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
        return NULL;
}
LCRYPTO_ALIAS(CMS_compress);