[thirdparty/openssl.git] / crypto / pkcs7 / pk7_smime.c

/* pk7_smime.c */
/*
 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
 * project.
 */
/* ====================================================================
 * Copyright (c) 1999-2004 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.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */

/* Simple PKCS#7 processing functions */

#include <stdio.h>
#include "internal/cryptlib.h"
#include <openssl/x509.h>
#include <openssl/x509v3.h>


#define BUFFERSIZE 4096

static int pkcs7_copy_existing_digest(PKCS7 *p7, PKCS7_SIGNER_INFO *si);

PKCS7 *PKCS7_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs,
                  BIO *data, int flags)
{
    PKCS7 *p7;
    int i;

    if ((p7 = PKCS7_new()) == NULL) {
        PKCS7err(PKCS7_F_PKCS7_SIGN, ERR_R_MALLOC_FAILURE);
        return NULL;
    }

    if (!PKCS7_set_type(p7, NID_pkcs7_signed))
        goto err;

    if (!PKCS7_content_new(p7, NID_pkcs7_data))
        goto err;

    if (pkey && !PKCS7_sign_add_signer(p7, signcert, pkey, NULL, flags)) {
        PKCS7err(PKCS7_F_PKCS7_SIGN, PKCS7_R_PKCS7_ADD_SIGNER_ERROR);
        goto err;
    }

    if (!(flags & PKCS7_NOCERTS)) {
        for (i = 0; i < sk_X509_num(certs); i++) {
            if (!PKCS7_add_certificate(p7, sk_X509_value(certs, i)))
                goto err;
        }
    }

    if (flags & PKCS7_DETACHED)
        PKCS7_set_detached(p7, 1);

    if (flags & (PKCS7_STREAM | PKCS7_PARTIAL))
        return p7;

    if (PKCS7_final(p7, data, flags))
        return p7;

 err:
    PKCS7_free(p7);
    return NULL;
}

int PKCS7_final(PKCS7 *p7, BIO *data, int flags)
{
    BIO *p7bio;
    int ret = 0;

    if ((p7bio = PKCS7_dataInit(p7, NULL)) == NULL) {
        PKCS7err(PKCS7_F_PKCS7_FINAL, ERR_R_MALLOC_FAILURE);
        return 0;
    }

    SMIME_crlf_copy(data, p7bio, flags);

    (void)BIO_flush(p7bio);

    if (!PKCS7_dataFinal(p7, p7bio)) {
        PKCS7err(PKCS7_F_PKCS7_FINAL, PKCS7_R_PKCS7_DATASIGN);
        goto err;
    }

    ret = 1;

 err:
    BIO_free_all(p7bio);

    return ret;

}

/* Check to see if a cipher exists and if so add S/MIME capabilities */

static int add_cipher_smcap(STACK_OF(X509_ALGOR) *sk, int nid, int arg)
{
    if (EVP_get_cipherbynid(nid))
        return PKCS7_simple_smimecap(sk, nid, arg);
    return 1;
}

static int add_digest_smcap(STACK_OF(X509_ALGOR) *sk, int nid, int arg)
{
    if (EVP_get_digestbynid(nid))
        return PKCS7_simple_smimecap(sk, nid, arg);
    return 1;
}

PKCS7_SIGNER_INFO *PKCS7_sign_add_signer(PKCS7 *p7, X509 *signcert,
                                         EVP_PKEY *pkey, const EVP_MD *md,
                                         int flags)
{
    PKCS7_SIGNER_INFO *si = NULL;
    STACK_OF(X509_ALGOR) *smcap = NULL;
    if (!X509_check_private_key(signcert, pkey)) {
        PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER,
                 PKCS7_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
        return NULL;
    }

    if ((si = PKCS7_add_signature(p7, signcert, pkey, md)) == NULL) {
        PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER,
                 PKCS7_R_PKCS7_ADD_SIGNATURE_ERROR);
        return NULL;
    }

    if (!(flags & PKCS7_NOCERTS)) {
        if (!PKCS7_add_certificate(p7, signcert))
            goto err;
    }

    if (!(flags & PKCS7_NOATTR)) {
        if (!PKCS7_add_attrib_content_type(si, NULL))
            goto err;
        /* Add SMIMECapabilities */
        if (!(flags & PKCS7_NOSMIMECAP)) {
            if ((smcap = sk_X509_ALGOR_new_null()) == NULL) {
                PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER, ERR_R_MALLOC_FAILURE);
                goto err;
            }
            if (!add_cipher_smcap(smcap, NID_aes_256_cbc, -1)
                || !add_digest_smcap(smcap, NID_id_GostR3411_2012_256, -1)
                || !add_digest_smcap(smcap, NID_id_GostR3411_2012_512, -1)
                || !add_digest_smcap(smcap, NID_id_GostR3411_94, -1)
                || !add_cipher_smcap(smcap, NID_id_Gost28147_89, -1)
                || !add_cipher_smcap(smcap, NID_aes_192_cbc, -1)
                || !add_cipher_smcap(smcap, NID_aes_128_cbc, -1)
                || !add_cipher_smcap(smcap, NID_des_ede3_cbc, -1)
                || !add_cipher_smcap(smcap, NID_rc2_cbc, 128)
                || !add_cipher_smcap(smcap, NID_rc2_cbc, 64)
                || !add_cipher_smcap(smcap, NID_des_cbc, -1)
                || !add_cipher_smcap(smcap, NID_rc2_cbc, 40)
                || !PKCS7_add_attrib_smimecap(si, smcap))
                goto err;
            sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
            smcap = NULL;
        }
        if (flags & PKCS7_REUSE_DIGEST) {
            if (!pkcs7_copy_existing_digest(p7, si))
                goto err;
            if (!(flags & PKCS7_PARTIAL) && !PKCS7_SIGNER_INFO_sign(si))
                goto err;
        }
    }
    return si;
 err:
    sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
    return NULL;
}

/*
 * Search for a digest matching SignerInfo digest type and if found copy
 * across.
 */

static int pkcs7_copy_existing_digest(PKCS7 *p7, PKCS7_SIGNER_INFO *si)
{
    int i;
    STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
    PKCS7_SIGNER_INFO *sitmp;
    ASN1_OCTET_STRING *osdig = NULL;
    sinfos = PKCS7_get_signer_info(p7);
    for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) {
        sitmp = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
        if (si == sitmp)
            break;
        if (sk_X509_ATTRIBUTE_num(sitmp->auth_attr) <= 0)
            continue;
        if (!OBJ_cmp(si->digest_alg->algorithm, sitmp->digest_alg->algorithm)) {
            osdig = PKCS7_digest_from_attributes(sitmp->auth_attr);
            break;
        }

    }

    if (osdig)
        return PKCS7_add1_attrib_digest(si, osdig->data, osdig->length);

    PKCS7err(PKCS7_F_PKCS7_COPY_EXISTING_DIGEST,
             PKCS7_R_NO_MATCHING_DIGEST_TYPE_FOUND);
    return 0;
}

int PKCS7_verify(PKCS7 *p7, STACK_OF(X509) *certs, X509_STORE *store,
                 BIO *indata, BIO *out, int flags)
{
    STACK_OF(X509) *signers;
    X509 *signer;
    STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
    PKCS7_SIGNER_INFO *si;
    X509_STORE_CTX cert_ctx;
    char *buf = NULL;
    int i, j = 0, k, ret = 0;
    BIO *p7bio = NULL;
    BIO *tmpin = NULL, *tmpout = NULL;

    if (!p7) {
        PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_INVALID_NULL_POINTER);
        return 0;
    }

    if (!PKCS7_type_is_signed(p7)) {
        PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_WRONG_CONTENT_TYPE);
        return 0;
    }

    /* Check for no data and no content: no data to verify signature */
    if (PKCS7_get_detached(p7) && !indata) {
        PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_NO_CONTENT);
        return 0;
    }

    /* Check for data and content: two sets of data */
    if (!PKCS7_get_detached(p7) && indata) {
        PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_CONTENT_AND_DATA_PRESENT);
        return 0;
    }

    sinfos = PKCS7_get_signer_info(p7);

    if (!sinfos || !sk_PKCS7_SIGNER_INFO_num(sinfos)) {
        PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_NO_SIGNATURES_ON_DATA);
        return 0;
    }

    signers = PKCS7_get0_signers(p7, certs, flags);
    if (!signers)
        return 0;

    /* Now verify the certificates */

    if (!(flags & PKCS7_NOVERIFY))
        for (k = 0; k < sk_X509_num(signers); k++) {
            signer = sk_X509_value(signers, k);
            if (!(flags & PKCS7_NOCHAIN)) {
                if (!X509_STORE_CTX_init(&cert_ctx, store, signer,
                                         p7->d.sign->cert)) {
                    PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_X509_LIB);
                    goto err;
                }
                X509_STORE_CTX_set_default(&cert_ctx, "smime_sign");
            } else if (!X509_STORE_CTX_init(&cert_ctx, store, signer, NULL)) {
                PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_X509_LIB);
                goto err;
            }
            if (!(flags & PKCS7_NOCRL))
                X509_STORE_CTX_set0_crls(&cert_ctx, p7->d.sign->crl);
            i = X509_verify_cert(&cert_ctx);
            if (i <= 0)
                j = X509_STORE_CTX_get_error(&cert_ctx);
            X509_STORE_CTX_cleanup(&cert_ctx);
            if (i <= 0) {
                PKCS7err(PKCS7_F_PKCS7_VERIFY,
                         PKCS7_R_CERTIFICATE_VERIFY_ERROR);
                ERR_add_error_data(2, "Verify error:",
                                   X509_verify_cert_error_string(j));
                goto err;
            }
            /* Check for revocation status here */
        }

    /*
     * 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 (indata && (BIO_method_type(indata) == BIO_TYPE_MEM)) {
        char *ptr;
        long len;
        len = BIO_get_mem_data(indata, &ptr);
        tmpin = BIO_new_mem_buf(ptr, len);
        if (tmpin == NULL) {
            PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_MALLOC_FAILURE);
            goto err;
        }
    } else
        tmpin = indata;

    if ((p7bio = PKCS7_dataInit(p7, tmpin)) == NULL)
        goto err;

    if (flags & PKCS7_TEXT) {
        if ((tmpout = BIO_new(BIO_s_mem())) == NULL) {
            PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_MALLOC_FAILURE);
            goto err;
        }
        BIO_set_mem_eof_return(tmpout, 0);
    } else
        tmpout = out;

    /* We now have to 'read' from p7bio to calculate digests etc. */
    if ((buf = OPENSSL_malloc(BUFFERSIZE)) == NULL) {
        PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_MALLOC_FAILURE);
        goto err;
    }
    for (;;) {
        i = BIO_read(p7bio, buf, BUFFERSIZE);
        if (i <= 0)
            break;
        if (tmpout)
            BIO_write(tmpout, buf, i);
    }

    if (flags & PKCS7_TEXT) {
        if (!SMIME_text(tmpout, out)) {
            PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_SMIME_TEXT_ERROR);
            BIO_free(tmpout);
            goto err;
        }
        BIO_free(tmpout);
    }

    /* Now Verify All Signatures */
    if (!(flags & PKCS7_NOSIGS))
        for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) {
            si = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
            signer = sk_X509_value(signers, i);
            j = PKCS7_signatureVerify(p7bio, p7, si, signer);
            if (j <= 0) {
                PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_SIGNATURE_FAILURE);
                goto err;
            }
        }

    ret = 1;

 err:
    OPENSSL_free(buf);
    if (tmpin == indata) {
        if (indata)
            BIO_pop(p7bio);
    }
    BIO_free_all(p7bio);
    sk_X509_free(signers);
    return ret;
}

STACK_OF(X509) *PKCS7_get0_signers(PKCS7 *p7, STACK_OF(X509) *certs,
                                   int flags)
{
    STACK_OF(X509) *signers;
    STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
    PKCS7_SIGNER_INFO *si;
    PKCS7_ISSUER_AND_SERIAL *ias;
    X509 *signer;
    int i;

    if (!p7) {
        PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS, PKCS7_R_INVALID_NULL_POINTER);
        return NULL;
    }

    if (!PKCS7_type_is_signed(p7)) {
        PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS, PKCS7_R_WRONG_CONTENT_TYPE);
        return NULL;
    }

    /* Collect all the signers together */

    sinfos = PKCS7_get_signer_info(p7);

    if (sk_PKCS7_SIGNER_INFO_num(sinfos) <= 0) {
        PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS, PKCS7_R_NO_SIGNERS);
        return 0;
    }

    if ((signers = sk_X509_new_null()) == NULL) {
        PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS, ERR_R_MALLOC_FAILURE);
        return NULL;
    }

    for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) {
        si = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
        ias = si->issuer_and_serial;
        signer = NULL;
        /* If any certificates passed they take priority */
        if (certs)
            signer = X509_find_by_issuer_and_serial(certs,
                                                    ias->issuer, ias->serial);
        if (!signer && !(flags & PKCS7_NOINTERN)
            && p7->d.sign->cert)
            signer =
                X509_find_by_issuer_and_serial(p7->d.sign->cert,
                                               ias->issuer, ias->serial);
        if (!signer) {
            PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,
                     PKCS7_R_SIGNER_CERTIFICATE_NOT_FOUND);
            sk_X509_free(signers);
            return 0;
        }

        if (!sk_X509_push(signers, signer)) {
            sk_X509_free(signers);
            return NULL;
        }
    }
    return signers;
}

/* Build a complete PKCS#7 enveloped data */

PKCS7 *PKCS7_encrypt(STACK_OF(X509) *certs, BIO *in, const EVP_CIPHER *cipher,
                     int flags)
{
    PKCS7 *p7;
    BIO *p7bio = NULL;
    int i;
    X509 *x509;
    if ((p7 = PKCS7_new()) == NULL) {
        PKCS7err(PKCS7_F_PKCS7_ENCRYPT, ERR_R_MALLOC_FAILURE);
        return NULL;
    }

    if (!PKCS7_set_type(p7, NID_pkcs7_enveloped))
        goto err;
    if (!PKCS7_set_cipher(p7, cipher)) {
        PKCS7err(PKCS7_F_PKCS7_ENCRYPT, PKCS7_R_ERROR_SETTING_CIPHER);
        goto err;
    }

    for (i = 0; i < sk_X509_num(certs); i++) {
        x509 = sk_X509_value(certs, i);
        if (!PKCS7_add_recipient(p7, x509)) {
            PKCS7err(PKCS7_F_PKCS7_ENCRYPT, PKCS7_R_ERROR_ADDING_RECIPIENT);
            goto err;
        }
    }

    if (flags & PKCS7_STREAM)
        return p7;

    if (PKCS7_final(p7, in, flags))
        return p7;

 err:

    BIO_free_all(p7bio);
    PKCS7_free(p7);
    return NULL;

}

int PKCS7_decrypt(PKCS7 *p7, EVP_PKEY *pkey, X509 *cert, BIO *data, int flags)
{
    BIO *tmpmem;
    int ret = 0, i;
    char *buf = NULL;

    if (!p7) {
        PKCS7err(PKCS7_F_PKCS7_DECRYPT, PKCS7_R_INVALID_NULL_POINTER);
        return 0;
    }

    if (!PKCS7_type_is_enveloped(p7)) {
        PKCS7err(PKCS7_F_PKCS7_DECRYPT, PKCS7_R_WRONG_CONTENT_TYPE);
        return 0;
    }

    if (cert && !X509_check_private_key(cert, pkey)) {
        PKCS7err(PKCS7_F_PKCS7_DECRYPT,
                 PKCS7_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
        return 0;
    }

    if ((tmpmem = PKCS7_dataDecode(p7, pkey, NULL, cert)) == NULL) {
        PKCS7err(PKCS7_F_PKCS7_DECRYPT, PKCS7_R_DECRYPT_ERROR);
        return 0;
    }

    if (flags & PKCS7_TEXT) {
        BIO *tmpbuf, *bread;
        /* Encrypt BIOs can't do BIO_gets() so add a buffer BIO */
        if ((tmpbuf = BIO_new(BIO_f_buffer())) == NULL) {
            PKCS7err(PKCS7_F_PKCS7_DECRYPT, ERR_R_MALLOC_FAILURE);
            BIO_free_all(tmpmem);
            return 0;
        }
        if ((bread = BIO_push(tmpbuf, tmpmem)) == NULL) {
            PKCS7err(PKCS7_F_PKCS7_DECRYPT, ERR_R_MALLOC_FAILURE);
            BIO_free_all(tmpbuf);
            BIO_free_all(tmpmem);
            return 0;
        }
        ret = SMIME_text(bread, data);
        if (ret > 0 && BIO_method_type(tmpmem) == BIO_TYPE_CIPHER) {
            if (!BIO_get_cipher_status(tmpmem))
                ret = 0;
        }
        BIO_free_all(bread);
        return ret;
    }
    if ((buf = OPENSSL_malloc(BUFFERSIZE)) == NULL) {
        PKCS7err(PKCS7_F_PKCS7_DECRYPT, ERR_R_MALLOC_FAILURE);
        goto err;
    }
    for (;;) {
        i = BIO_read(tmpmem, buf, BUFFERSIZE);
        if (i <= 0) {
            ret = 1;
            if (BIO_method_type(tmpmem) == BIO_TYPE_CIPHER) {
                if (!BIO_get_cipher_status(tmpmem))
                    ret = 0;
            }

            break;
        }
        if (BIO_write(data, buf, i) != i) {
            break;
        }
    }
err:
    OPENSSL_free(buf);
    BIO_free_all(tmpmem);
    return ret;
}
Commit	Line	Data
5a9a4b29	1	/* pk7_smime.c */
0f113f3e MC	2	/*
0f113f3e MC	3	* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
27068df7	4	* project.
5a9a4b29 DSH	5	*/
5a9a4b29 DSH	6	/* ====================================================================
9d10b15e	7	* Copyright (c) 1999-2004 The OpenSSL Project. All rights reserved.
5a9a4b29 DSH	8	*
	9	* Redistribution and use in source and binary forms, with or without
	10	* modification, are permitted provided that the following conditions
	11	* are met:
	12	*
	13	* 1. Redistributions of source code must retain the above copyright
0f113f3e	14	* notice, this list of conditions and the following disclaimer.
5a9a4b29 DSH	15	*
	16	* 2. Redistributions in binary form must reproduce the above copyright
	17	* notice, this list of conditions and the following disclaimer in
	18	* the documentation and/or other materials provided with the
	19	* distribution.
	20	*
	21	* 3. All advertising materials mentioning features or use of this
	22	* software must display the following acknowledgment:
	23	* "This product includes software developed by the OpenSSL Project
	24	* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
	25	*
	26	* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
	27	* endorse or promote products derived from this software without
	28	* prior written permission. For written permission, please contact
	29	* licensing@OpenSSL.org.
	30	*
	31	* 5. Products derived from this software may not be called "OpenSSL"
	32	* nor may "OpenSSL" appear in their names without prior written
	33	* permission of the OpenSSL Project.
	34	*
	35	* 6. Redistributions of any form whatsoever must retain the following
	36	* acknowledgment:
	37	* "This product includes software developed by the OpenSSL Project
	38	* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
	39	*
	40	* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
	41	* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	42	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	43	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
	44	* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	45	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	46	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	47	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	48	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	49	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	50	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
	51	* OF THE POSSIBILITY OF SUCH DAMAGE.
	52	* ====================================================================
	53	*
	54	* This product includes cryptographic software written by Eric Young
	55	* (eay@cryptsoft.com). This product includes software written by Tim
	56	* Hudson (tjh@cryptsoft.com).
	57	*
	58	*/
	59
	60	/* Simple PKCS#7 processing functions */
	61
	62	#include <stdio.h>
b39fc560	63	#include "internal/cryptlib.h"
5a9a4b29 DSH	64	#include <openssl/x509.h>
	65	#include <openssl/x509v3.h>
	66
8e704858 RS	67
	68	#define BUFFERSIZE 4096
	69
55311921 DSH	70	static int pkcs7_copy_existing_digest(PKCS7 p7, PKCS7_SIGNER_INFO si);
55311921 DSH	71
5a9a4b29	72	PKCS7 PKCS7_sign(X509 signcert, EVP_PKEY pkey, STACK_OF(X509) certs,
0f113f3e	73	BIO *data, int flags)
5a9a4b29	74	{
0f113f3e MC	75	PKCS7 *p7;
	76	int i;
	77
75ebbd9a	78	if ((p7 = PKCS7_new()) == NULL) {
0f113f3e MC	79	PKCS7err(PKCS7_F_PKCS7_SIGN, ERR_R_MALLOC_FAILURE);
	80	return NULL;
	81	}
	82
	83	if (!PKCS7_set_type(p7, NID_pkcs7_signed))
	84	goto err;
	85
	86	if (!PKCS7_content_new(p7, NID_pkcs7_data))
	87	goto err;
	88
	89	if (pkey && !PKCS7_sign_add_signer(p7, signcert, pkey, NULL, flags)) {
	90	PKCS7err(PKCS7_F_PKCS7_SIGN, PKCS7_R_PKCS7_ADD_SIGNER_ERROR);
	91	goto err;
	92	}
	93
	94	if (!(flags & PKCS7_NOCERTS)) {
	95	for (i = 0; i < sk_X509_num(certs); i++) {
	96	if (!PKCS7_add_certificate(p7, sk_X509_value(certs, i)))
	97	goto err;
	98	}
	99	}
	100
	101	if (flags & PKCS7_DETACHED)
	102	PKCS7_set_detached(p7, 1);
	103
	104	if (flags & (PKCS7_STREAM \| PKCS7_PARTIAL))
	105	return p7;
	106
	107	if (PKCS7_final(p7, data, flags))
	108	return p7;
	109
	110	err:
	111	PKCS7_free(p7);
	112	return NULL;
60f20632 DSH	113	}
	114
	115	int PKCS7_final(PKCS7 p7, BIO data, int flags)
0f113f3e MC	116	{
	117	BIO *p7bio;
	118	int ret = 0;
8e704858	119
75ebbd9a	120	if ((p7bio = PKCS7_dataInit(p7, NULL)) == NULL) {
0f113f3e MC	121	PKCS7err(PKCS7_F_PKCS7_FINAL, ERR_R_MALLOC_FAILURE);
	122	return 0;
	123	}
60f20632	124
0f113f3e	125	SMIME_crlf_copy(data, p7bio, flags);
994df5a2	126
0f113f3e	127	(void)BIO_flush(p7bio);
60f20632	128
0f113f3e MC	129	if (!PKCS7_dataFinal(p7, p7bio)) {
	130	PKCS7err(PKCS7_F_PKCS7_FINAL, PKCS7_R_PKCS7_DATASIGN);
	131	goto err;
	132	}
5a9a4b29	133
0f113f3e	134	ret = 1;
60f20632	135
0f113f3e MC	136	err:
0f113f3e MC	137	BIO_free_all(p7bio);
60f20632	138
0f113f3e	139	return ret;
27068df7	140
0f113f3e	141	}
27068df7	142
60f20632	143	/* Check to see if a cipher exists and if so add S/MIME capabilities */
27068df7	144
60f20632	145	static int add_cipher_smcap(STACK_OF(X509_ALGOR) *sk, int nid, int arg)
0f113f3e MC	146	{
	147	if (EVP_get_cipherbynid(nid))
	148	return PKCS7_simple_smimecap(sk, nid, arg);
	149	return 1;
	150	}
5a9a4b29	151
61e5ec4b	152	static int add_digest_smcap(STACK_OF(X509_ALGOR) *sk, int nid, int arg)
0f113f3e MC	153	{
	154	if (EVP_get_digestbynid(nid))
	155	return PKCS7_simple_smimecap(sk, nid, arg);
	156	return 1;
	157	}
61e5ec4b	158
60f20632	159	PKCS7_SIGNER_INFO PKCS7_sign_add_signer(PKCS7 p7, X509 *signcert,
0f113f3e MC	160	EVP_PKEY pkey, const EVP_MD md,
	161	int flags)
	162	{
	163	PKCS7_SIGNER_INFO *si = NULL;
	164	STACK_OF(X509_ALGOR) *smcap = NULL;
	165	if (!X509_check_private_key(signcert, pkey)) {
	166	PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER,
	167	PKCS7_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
	168	return NULL;
	169	}
	170
75ebbd9a	171	if ((si = PKCS7_add_signature(p7, signcert, pkey, md)) == NULL) {
0f113f3e MC	172	PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER,
	173	PKCS7_R_PKCS7_ADD_SIGNATURE_ERROR);
	174	return NULL;
	175	}
	176
	177	if (!(flags & PKCS7_NOCERTS)) {
	178	if (!PKCS7_add_certificate(p7, signcert))
	179	goto err;
	180	}
	181
	182	if (!(flags & PKCS7_NOATTR)) {
	183	if (!PKCS7_add_attrib_content_type(si, NULL))
	184	goto err;
	185	/* Add SMIMECapabilities */
	186	if (!(flags & PKCS7_NOSMIMECAP)) {
75ebbd9a	187	if ((smcap = sk_X509_ALGOR_new_null()) == NULL) {
0f113f3e MC	188	PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER, ERR_R_MALLOC_FAILURE);
	189	goto err;
	190	}
	191	if (!add_cipher_smcap(smcap, NID_aes_256_cbc, -1)
c58f3e42 MC	192	\|\| !add_digest_smcap(smcap, NID_id_GostR3411_2012_256, -1)
c58f3e42 MC	193	\|\| !add_digest_smcap(smcap, NID_id_GostR3411_2012_512, -1)
0f113f3e MC	194	\|\| !add_digest_smcap(smcap, NID_id_GostR3411_94, -1)
	195	\|\| !add_cipher_smcap(smcap, NID_id_Gost28147_89, -1)
	196	\|\| !add_cipher_smcap(smcap, NID_aes_192_cbc, -1)
	197	\|\| !add_cipher_smcap(smcap, NID_aes_128_cbc, -1)
	198	\|\| !add_cipher_smcap(smcap, NID_des_ede3_cbc, -1)
	199	\|\| !add_cipher_smcap(smcap, NID_rc2_cbc, 128)
	200	\|\| !add_cipher_smcap(smcap, NID_rc2_cbc, 64)
	201	\|\| !add_cipher_smcap(smcap, NID_des_cbc, -1)
	202	\|\| !add_cipher_smcap(smcap, NID_rc2_cbc, 40)
	203	\|\| !PKCS7_add_attrib_smimecap(si, smcap))
	204	goto err;
	205	sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
	206	smcap = NULL;
	207	}
	208	if (flags & PKCS7_REUSE_DIGEST) {
	209	if (!pkcs7_copy_existing_digest(p7, si))
	210	goto err;
	211	if (!(flags & PKCS7_PARTIAL) && !PKCS7_SIGNER_INFO_sign(si))
	212	goto err;
	213	}
	214	}
	215	return si;
	216	err:
222561fe	217	sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
0f113f3e MC	218	return NULL;
	219	}
	220
	221	/*
	222	* Search for a digest matching SignerInfo digest type and if found copy
	223	* across.
55311921 DSH	224	*/
	225
	226	static int pkcs7_copy_existing_digest(PKCS7 p7, PKCS7_SIGNER_INFO si)
0f113f3e MC	227	{
	228	int i;
	229	STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
	230	PKCS7_SIGNER_INFO *sitmp;
	231	ASN1_OCTET_STRING *osdig = NULL;
	232	sinfos = PKCS7_get_signer_info(p7);
	233	for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) {
	234	sitmp = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
	235	if (si == sitmp)
	236	break;
	237	if (sk_X509_ATTRIBUTE_num(sitmp->auth_attr) <= 0)
	238	continue;
	239	if (!OBJ_cmp(si->digest_alg->algorithm, sitmp->digest_alg->algorithm)) {
	240	osdig = PKCS7_digest_from_attributes(sitmp->auth_attr);
	241	break;
	242	}
	243
	244	}
	245
	246	if (osdig)
	247	return PKCS7_add1_attrib_digest(si, osdig->data, osdig->length);
	248
	249	PKCS7err(PKCS7_F_PKCS7_COPY_EXISTING_DIGEST,
	250	PKCS7_R_NO_MATCHING_DIGEST_TYPE_FOUND);
	251	return 0;
	252	}
55311921	253
5a9a4b29	254	int PKCS7_verify(PKCS7 p7, STACK_OF(X509) certs, X509_STORE *store,
0f113f3e	255	BIO indata, BIO out, int flags)
5a9a4b29	256	{
0f113f3e MC	257	STACK_OF(X509) *signers;
	258	X509 *signer;
	259	STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
	260	PKCS7_SIGNER_INFO *si;
	261	X509_STORE_CTX cert_ctx;
8e704858	262	char *buf = NULL;
0f113f3e	263	int i, j = 0, k, ret = 0;
55500ea7 AG	264	BIO *p7bio = NULL;
55500ea7 AG	265	BIO tmpin = NULL, tmpout = NULL;
0f113f3e MC	266
	267	if (!p7) {
	268	PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_INVALID_NULL_POINTER);
	269	return 0;
	270	}
	271
	272	if (!PKCS7_type_is_signed(p7)) {
	273	PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_WRONG_CONTENT_TYPE);
	274	return 0;
	275	}
	276
	277	/* Check for no data and no content: no data to verify signature */
	278	if (PKCS7_get_detached(p7) && !indata) {
	279	PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_NO_CONTENT);
	280	return 0;
	281	}
02a938c9	282
0f113f3e MC	283	/* Check for data and content: two sets of data */
	284	if (!PKCS7_get_detached(p7) && indata) {
	285	PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_CONTENT_AND_DATA_PRESENT);
	286	return 0;
	287	}
5a9a4b29	288
0f113f3e MC	289	sinfos = PKCS7_get_signer_info(p7);
	290
	291	if (!sinfos \|\| !sk_PKCS7_SIGNER_INFO_num(sinfos)) {
	292	PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_NO_SIGNATURES_ON_DATA);
	293	return 0;
	294	}
	295
	296	signers = PKCS7_get0_signers(p7, certs, flags);
0f113f3e MC	297	if (!signers)
	298	return 0;
	299
	300	/* Now verify the certificates */
	301
	302	if (!(flags & PKCS7_NOVERIFY))
	303	for (k = 0; k < sk_X509_num(signers); k++) {
	304	signer = sk_X509_value(signers, k);
	305	if (!(flags & PKCS7_NOCHAIN)) {
	306	if (!X509_STORE_CTX_init(&cert_ctx, store, signer,
	307	p7->d.sign->cert)) {
	308	PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_X509_LIB);
55500ea7	309	goto err;
0f113f3e MC	310	}
	311	X509_STORE_CTX_set_default(&cert_ctx, "smime_sign");
	312	} else if (!X509_STORE_CTX_init(&cert_ctx, store, signer, NULL)) {
	313	PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_X509_LIB);
55500ea7	314	goto err;
0f113f3e MC	315	}
	316	if (!(flags & PKCS7_NOCRL))
	317	X509_STORE_CTX_set0_crls(&cert_ctx, p7->d.sign->crl);
	318	i = X509_verify_cert(&cert_ctx);
	319	if (i <= 0)
	320	j = X509_STORE_CTX_get_error(&cert_ctx);
	321	X509_STORE_CTX_cleanup(&cert_ctx);
	322	if (i <= 0) {
	323	PKCS7err(PKCS7_F_PKCS7_VERIFY,
	324	PKCS7_R_CERTIFICATE_VERIFY_ERROR);
	325	ERR_add_error_data(2, "Verify error:",
	326	X509_verify_cert_error_string(j));
55500ea7	327	goto err;
0f113f3e MC	328	}
	329	/* Check for revocation status here */
	330	}
	331
	332	/*
	333	* Performance optimization: if the content is a memory BIO then store
	334	* its contents in a temporary read only memory BIO. This avoids
	335	* potentially large numbers of slow copies of data which will occur when
	336	* reading from a read write memory BIO when signatures are calculated.
	337	*/
	338
	339	if (indata && (BIO_method_type(indata) == BIO_TYPE_MEM)) {
	340	char *ptr;
	341	long len;
	342	len = BIO_get_mem_data(indata, &ptr);
	343	tmpin = BIO_new_mem_buf(ptr, len);
	344	if (tmpin == NULL) {
	345	PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_MALLOC_FAILURE);
55500ea7	346	goto err;
0f113f3e MC	347	}
	348	} else
	349	tmpin = indata;
	350
75ebbd9a	351	if ((p7bio = PKCS7_dataInit(p7, tmpin)) == NULL)
0f113f3e MC	352	goto err;
	353
	354	if (flags & PKCS7_TEXT) {
75ebbd9a	355	if ((tmpout = BIO_new(BIO_s_mem())) == NULL) {
0f113f3e MC	356	PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_MALLOC_FAILURE);
	357	goto err;
	358	}
	359	BIO_set_mem_eof_return(tmpout, 0);
	360	} else
	361	tmpout = out;
	362
	363	/* We now have to 'read' from p7bio to calculate digests etc. */
8e704858 RS	364	if ((buf = OPENSSL_malloc(BUFFERSIZE)) == NULL) {
	365	PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_MALLOC_FAILURE);
	366	goto err;
	367	}
0f113f3e	368	for (;;) {
8e704858	369	i = BIO_read(p7bio, buf, BUFFERSIZE);
0f113f3e MC	370	if (i <= 0)
	371	break;
	372	if (tmpout)
	373	BIO_write(tmpout, buf, i);
	374	}
	375
	376	if (flags & PKCS7_TEXT) {
	377	if (!SMIME_text(tmpout, out)) {
	378	PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_SMIME_TEXT_ERROR);
	379	BIO_free(tmpout);
	380	goto err;
	381	}
	382	BIO_free(tmpout);
	383	}
	384
	385	/* Now Verify All Signatures */
	386	if (!(flags & PKCS7_NOSIGS))
	387	for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) {
	388	si = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
	389	signer = sk_X509_value(signers, i);
	390	j = PKCS7_signatureVerify(p7bio, p7, si, signer);
	391	if (j <= 0) {
	392	PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_SIGNATURE_FAILURE);
	393	goto err;
	394	}
	395	}
	396
	397	ret = 1;
	398
	399	err:
8e704858	400	OPENSSL_free(buf);
0f113f3e MC	401	if (tmpin == indata) {
	402	if (indata)
	403	BIO_pop(p7bio);
	404	}
	405	BIO_free_all(p7bio);
0f113f3e	406	sk_X509_free(signers);
0f113f3e	407	return ret;
5a9a4b29 DSH	408	}
5a9a4b29 DSH	409
0f113f3e MC	410	STACK_OF(X509) PKCS7_get0_signers(PKCS7 p7, STACK_OF(X509) *certs,
0f113f3e MC	411	int flags)
55ec5861	412	{
0f113f3e MC	413	STACK_OF(X509) *signers;
	414	STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
	415	PKCS7_SIGNER_INFO *si;
	416	PKCS7_ISSUER_AND_SERIAL *ias;
	417	X509 *signer;
	418	int i;
	419
	420	if (!p7) {
	421	PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS, PKCS7_R_INVALID_NULL_POINTER);
	422	return NULL;
	423	}
	424
	425	if (!PKCS7_type_is_signed(p7)) {
	426	PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS, PKCS7_R_WRONG_CONTENT_TYPE);
	427	return NULL;
	428	}
	429
	430	/* Collect all the signers together */
	431
	432	sinfos = PKCS7_get_signer_info(p7);
	433
	434	if (sk_PKCS7_SIGNER_INFO_num(sinfos) <= 0) {
	435	PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS, PKCS7_R_NO_SIGNERS);
	436	return 0;
	437	}
	438
75ebbd9a	439	if ((signers = sk_X509_new_null()) == NULL) {
0f113f3e MC	440	PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS, ERR_R_MALLOC_FAILURE);
	441	return NULL;
	442	}
	443
	444	for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) {
	445	si = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
	446	ias = si->issuer_and_serial;
	447	signer = NULL;
	448	/* If any certificates passed they take priority */
	449	if (certs)
	450	signer = X509_find_by_issuer_and_serial(certs,
	451	ias->issuer, ias->serial);
	452	if (!signer && !(flags & PKCS7_NOINTERN)
	453	&& p7->d.sign->cert)
	454	signer =
	455	X509_find_by_issuer_and_serial(p7->d.sign->cert,
	456	ias->issuer, ias->serial);
	457	if (!signer) {
	458	PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,
	459	PKCS7_R_SIGNER_CERTIFICATE_NOT_FOUND);
	460	sk_X509_free(signers);
	461	return 0;
	462	}
	463
	464	if (!sk_X509_push(signers, signer)) {
	465	sk_X509_free(signers);
	466	return NULL;
	467	}
	468	}
	469	return signers;
55ec5861 DSH	470	}
55ec5861 DSH	471
5a9a4b29 DSH	472	/* Build a complete PKCS#7 enveloped data */
5a9a4b29 DSH	473
13588350	474	PKCS7 PKCS7_encrypt(STACK_OF(X509) certs, BIO in, const EVP_CIPHER cipher,
0f113f3e	475	int flags)
5a9a4b29	476	{
0f113f3e MC	477	PKCS7 *p7;
	478	BIO *p7bio = NULL;
	479	int i;
	480	X509 *x509;
75ebbd9a	481	if ((p7 = PKCS7_new()) == NULL) {
0f113f3e MC	482	PKCS7err(PKCS7_F_PKCS7_ENCRYPT, ERR_R_MALLOC_FAILURE);
	483	return NULL;
	484	}
	485
	486	if (!PKCS7_set_type(p7, NID_pkcs7_enveloped))
	487	goto err;
	488	if (!PKCS7_set_cipher(p7, cipher)) {
	489	PKCS7err(PKCS7_F_PKCS7_ENCRYPT, PKCS7_R_ERROR_SETTING_CIPHER);
	490	goto err;
	491	}
	492
	493	for (i = 0; i < sk_X509_num(certs); i++) {
	494	x509 = sk_X509_value(certs, i);
	495	if (!PKCS7_add_recipient(p7, x509)) {
	496	PKCS7err(PKCS7_F_PKCS7_ENCRYPT, PKCS7_R_ERROR_ADDING_RECIPIENT);
	497	goto err;
	498	}
	499	}
	500
	501	if (flags & PKCS7_STREAM)
	502	return p7;
	503
	504	if (PKCS7_final(p7, in, flags))
	505	return p7;
	506
	507	err:
	508
	509	BIO_free_all(p7bio);
	510	PKCS7_free(p7);
	511	return NULL;
5a9a4b29 DSH	512
	513	}
	514
	515	int PKCS7_decrypt(PKCS7 p7, EVP_PKEY pkey, X509 cert, BIO data, int flags)
	516	{
0f113f3e	517	BIO *tmpmem;
29717229	518	int ret = 0, i;
8e704858	519	char *buf = NULL;
0f113f3e MC	520
	521	if (!p7) {
	522	PKCS7err(PKCS7_F_PKCS7_DECRYPT, PKCS7_R_INVALID_NULL_POINTER);
	523	return 0;
	524	}
	525
	526	if (!PKCS7_type_is_enveloped(p7)) {
	527	PKCS7err(PKCS7_F_PKCS7_DECRYPT, PKCS7_R_WRONG_CONTENT_TYPE);
	528	return 0;
	529	}
	530
	531	if (cert && !X509_check_private_key(cert, pkey)) {
	532	PKCS7err(PKCS7_F_PKCS7_DECRYPT,
	533	PKCS7_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
	534	return 0;
	535	}
	536
75ebbd9a	537	if ((tmpmem = PKCS7_dataDecode(p7, pkey, NULL, cert)) == NULL) {
0f113f3e MC	538	PKCS7err(PKCS7_F_PKCS7_DECRYPT, PKCS7_R_DECRYPT_ERROR);
	539	return 0;
	540	}
	541
	542	if (flags & PKCS7_TEXT) {
	543	BIO tmpbuf, bread;
	544	/* Encrypt BIOs can't do BIO_gets() so add a buffer BIO */
75ebbd9a	545	if ((tmpbuf = BIO_new(BIO_f_buffer())) == NULL) {
0f113f3e MC	546	PKCS7err(PKCS7_F_PKCS7_DECRYPT, ERR_R_MALLOC_FAILURE);
	547	BIO_free_all(tmpmem);
	548	return 0;
	549	}
75ebbd9a	550	if ((bread = BIO_push(tmpbuf, tmpmem)) == NULL) {
0f113f3e MC	551	PKCS7err(PKCS7_F_PKCS7_DECRYPT, ERR_R_MALLOC_FAILURE);
	552	BIO_free_all(tmpbuf);
	553	BIO_free_all(tmpmem);
	554	return 0;
	555	}
	556	ret = SMIME_text(bread, data);
	557	if (ret > 0 && BIO_method_type(tmpmem) == BIO_TYPE_CIPHER) {
	558	if (!BIO_get_cipher_status(tmpmem))
	559	ret = 0;
	560	}
	561	BIO_free_all(bread);
	562	return ret;
8e704858 RS	563	}
	564	if ((buf = OPENSSL_malloc(BUFFERSIZE)) == NULL) {
	565	PKCS7err(PKCS7_F_PKCS7_DECRYPT, ERR_R_MALLOC_FAILURE);
	566	goto err;
	567	}
	568	for (;;) {
	569	i = BIO_read(tmpmem, buf, BUFFERSIZE);
	570	if (i <= 0) {
	571	ret = 1;
	572	if (BIO_method_type(tmpmem) == BIO_TYPE_CIPHER) {
	573	if (!BIO_get_cipher_status(tmpmem))
	574	ret = 0;
0f113f3e	575	}
8e704858 RS	576
	577	break;
	578	}
	579	if (BIO_write(data, buf, i) != i) {
8e704858	580	break;
0f113f3e	581	}
0f113f3e	582	}
8e704858 RS	583	err:
	584	OPENSSL_free(buf);
	585	BIO_free_all(tmpmem);
	586	return ret;
5a9a4b29	587	}