/*

 * Copyright 2008-2019 The OpenSSL Project Authors. All Rights Reserved.

 *

 * Licensed under the OpenSSL license (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

 */

/* CMS utility function */

#include <stdio.h>

#include <string.h>

#include "apps.h"

#include "progs.h"

#ifndef OPENSSL_NO_CMS

# include <openssl/crypto.h>

# include <openssl/pem.h>

# include <openssl/err.h>

# include <openssl/x509_vfy.h>

# include <openssl/x509v3.h>

# include <openssl/cms.h>

static int save_certs(char *signerfile, STACK_OF(X509) *signers);

static int cms_cb(int ok, X509_STORE_CTX *ctx);

static void receipt_request_print(CMS_ContentInfo *cms);

static CMS_ReceiptRequest *make_receipt_request(STACK_OF(OPENSSL_STRING)

                                                *rr_to, int rr_allorfirst, STACK_OF(OPENSSL_STRING)

                                                *rr_from);

static int cms_set_pkey_param(EVP_PKEY_CTX *pctx,

                              STACK_OF(OPENSSL_STRING) *param);

# define SMIME_OP        0x10

# define SMIME_IP        0x20

# define SMIME_SIGNERS   0x40

# define SMIME_ENCRYPT           (1 | SMIME_OP)

# define SMIME_DECRYPT           (2 | SMIME_IP)

# define SMIME_SIGN              (3 | SMIME_OP | SMIME_SIGNERS)

# define SMIME_VERIFY            (4 | SMIME_IP)

# define SMIME_CMSOUT            (5 | SMIME_IP | SMIME_OP)

# define SMIME_RESIGN            (6 | SMIME_IP | SMIME_OP | SMIME_SIGNERS)

# define SMIME_DATAOUT           (7 | SMIME_IP)

# define SMIME_DATA_CREATE       (8 | SMIME_OP)

# define SMIME_DIGEST_VERIFY     (9 | SMIME_IP)

# define SMIME_DIGEST_CREATE     (10 | SMIME_OP)

# define SMIME_UNCOMPRESS        (11 | SMIME_IP)

# define SMIME_COMPRESS          (12 | SMIME_OP)

# define SMIME_ENCRYPTED_DECRYPT (13 | SMIME_IP)

# define SMIME_ENCRYPTED_ENCRYPT (14 | SMIME_OP)

# define SMIME_SIGN_RECEIPT      (15 | SMIME_IP | SMIME_OP)

# define SMIME_VERIFY_RECEIPT    (16 | SMIME_IP)

static int verify_err = 0;

typedef struct cms_key_param_st cms_key_param;

struct cms_key_param_st {

    int idx;

    STACK_OF(OPENSSL_STRING) *param;

    cms_key_param *next;

};

typedef enum OPTION_choice {

    OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,

    OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT, OPT_ENCRYPT,

    OPT_DECRYPT, OPT_SIGN, OPT_SIGN_RECEIPT, OPT_RESIGN,

    OPT_VERIFY, OPT_VERIFY_RETCODE, OPT_VERIFY_RECEIPT,

    OPT_CMSOUT, OPT_DATA_OUT, OPT_DATA_CREATE, OPT_DIGEST_VERIFY,

    OPT_DIGEST_CREATE, OPT_COMPRESS, OPT_UNCOMPRESS,

    OPT_ED_DECRYPT, OPT_ED_ENCRYPT, OPT_DEBUG_DECRYPT, OPT_TEXT,

    OPT_ASCIICRLF, OPT_NOINTERN, OPT_NOVERIFY, OPT_NOCERTS,

    OPT_NOATTR, OPT_NODETACH, OPT_NOSMIMECAP, OPT_BINARY, OPT_KEYID,

    OPT_NOSIGS, OPT_NO_CONTENT_VERIFY, OPT_NO_ATTR_VERIFY, OPT_INDEF,

    OPT_NOINDEF, OPT_CRLFEOL, OPT_NOOUT, OPT_RR_PRINT,

    OPT_RR_ALL, OPT_RR_FIRST, OPT_RCTFORM, OPT_CERTFILE, OPT_CAFILE,

    OPT_CAPATH, OPT_NOCAPATH, OPT_NOCAFILE,OPT_CONTENT, OPT_PRINT,

    OPT_SECRETKEY, OPT_SECRETKEYID, OPT_PWRI_PASSWORD, OPT_ECONTENT_TYPE,

    OPT_PASSIN, OPT_TO, OPT_FROM, OPT_SUBJECT, OPT_SIGNER, OPT_RECIP,

    OPT_CERTSOUT, OPT_MD, OPT_INKEY, OPT_KEYFORM, OPT_KEYOPT, OPT_RR_FROM,

    OPT_RR_TO, OPT_AES128_WRAP, OPT_AES192_WRAP, OPT_AES256_WRAP,

    OPT_3DES_WRAP, OPT_ENGINE,

    OPT_R_ENUM,

    OPT_V_ENUM,

    OPT_CIPHER

} OPTION_CHOICE;

const OPTIONS cms_options[] = {

    {OPT_HELP_STR, 1, '-', "Usage: %s [options] cert.pem...\n"},

    {OPT_HELP_STR, 1, '-',

        "  cert.pem... recipient certs for encryption\n"},

    {OPT_HELP_STR, 1, '-', "Valid options are:\n"},

    {"help", OPT_HELP, '-', "Display this summary"},

    {"inform", OPT_INFORM, 'c', "Input format SMIME (default), PEM or DER"},

    {"outform", OPT_OUTFORM, 'c',

     "Output format SMIME (default), PEM or DER"},

    {"in", OPT_IN, '<', "Input file"},

    {"out", OPT_OUT, '>', "Output file"},

    {"encrypt", OPT_ENCRYPT, '-', "Encrypt message"},

    {"decrypt", OPT_DECRYPT, '-', "Decrypt encrypted message"},

    {"sign", OPT_SIGN, '-', "Sign message"},

    {"sign_receipt", OPT_SIGN_RECEIPT, '-', "Generate a signed receipt for the message"},

    {"resign", OPT_RESIGN, '-', "Resign a signed message"},

    {"verify", OPT_VERIFY, '-', "Verify signed message"},

    {"verify_retcode", OPT_VERIFY_RETCODE, '-'},

    {"verify_receipt", OPT_VERIFY_RECEIPT, '<'},

    {"cmsout", OPT_CMSOUT, '-', "Output CMS structure"},

    {"data_out", OPT_DATA_OUT, '-'},

    {"data_create", OPT_DATA_CREATE, '-'},

    {"digest_verify", OPT_DIGEST_VERIFY, '-'},

    {"digest_create", OPT_DIGEST_CREATE, '-'},

    {"compress", OPT_COMPRESS, '-'},

    {"uncompress", OPT_UNCOMPRESS, '-'},

    {"EncryptedData_decrypt", OPT_ED_DECRYPT, '-'},

    {"EncryptedData_encrypt", OPT_ED_ENCRYPT, '-'},

    {"debug_decrypt", OPT_DEBUG_DECRYPT, '-'},

    {"text", OPT_TEXT, '-', "Include or delete text MIME headers"},

    {"asciicrlf", OPT_ASCIICRLF, '-'},

    {"nointern", OPT_NOINTERN, '-',

     "Don't search certificates in message for signer"},

    {"noverify", OPT_NOVERIFY, '-', "Don't verify signers certificate"},

    {"nocerts", OPT_NOCERTS, '-',

     "Don't include signers certificate when signing"},

    {"noattr", OPT_NOATTR, '-', "Don't include any signed attributes"},

    {"nodetach", OPT_NODETACH, '-', "Use opaque signing"},

    {"nosmimecap", OPT_NOSMIMECAP, '-', "Omit the SMIMECapabilities attribute"},

    {"binary", OPT_BINARY, '-', "Don't translate message to text"},

    {"keyid", OPT_KEYID, '-', "Use subject key identifier"},

    {"nosigs", OPT_NOSIGS, '-', "Don't verify message signature"},

    {"no_content_verify", OPT_NO_CONTENT_VERIFY, '-'},

    {"no_attr_verify", OPT_NO_ATTR_VERIFY, '-'},

    {"stream", OPT_INDEF, '-', "Enable CMS streaming"},

    {"indef", OPT_INDEF, '-', "Same as -stream"},

    {"noindef", OPT_NOINDEF, '-', "Disable CMS streaming"},

    {"crlfeol", OPT_CRLFEOL, '-', "Use CRLF as EOL termination instead of CR only" },

    {"noout", OPT_NOOUT, '-', "For the -cmsout operation do not output the parsed CMS structure"},

    {"receipt_request_print", OPT_RR_PRINT, '-', "Print CMS Receipt Request" },

    {"receipt_request_all", OPT_RR_ALL, '-'},

    {"receipt_request_first", OPT_RR_FIRST, '-'},

    {"rctform", OPT_RCTFORM, 'F', "Receipt file format"},

    {"certfile", OPT_CERTFILE, '<', "Other certificates file"},

    {"CAfile", OPT_CAFILE, '<', "Trusted certificates file"},

    {"CApath", OPT_CAPATH, '/', "trusted certificates directory"},

    {"no-CAfile", OPT_NOCAFILE, '-',

     "Do not load the default certificates file"},

    {"no-CApath", OPT_NOCAPATH, '-',

     "Do not load certificates from the default certificates directory"},

    {"content", OPT_CONTENT, '<',

     "Supply or override content for detached signature"},

    {"print", OPT_PRINT, '-',

     "For the -cmsout operation print out all fields of the CMS structure"},

    {"secretkey", OPT_SECRETKEY, 's'},

    {"secretkeyid", OPT_SECRETKEYID, 's'},

    {"pwri_password", OPT_PWRI_PASSWORD, 's'},

    {"econtent_type", OPT_ECONTENT_TYPE, 's'},

    {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},

    {"to", OPT_TO, 's', "To address"},

    {"from", OPT_FROM, 's', "From address"},

    {"subject", OPT_SUBJECT, 's', "Subject"},

    {"signer", OPT_SIGNER, 's', "Signer certificate file"},

    {"recip", OPT_RECIP, '<', "Recipient cert file for decryption"},

    {"certsout", OPT_CERTSOUT, '>', "Certificate output file"},

    {"md", OPT_MD, 's', "Digest algorithm to use when signing or resigning"},

    {"inkey", OPT_INKEY, 's',

     "Input private key (if not signer or recipient)"},

    {"keyform", OPT_KEYFORM, 'f', "Input private key format (PEM or ENGINE)"},

    {"keyopt", OPT_KEYOPT, 's', "Set public key parameters as n:v pairs"},

    {"receipt_request_from", OPT_RR_FROM, 's'},

    {"receipt_request_to", OPT_RR_TO, 's'},

    {"", OPT_CIPHER, '-', "Any supported cipher"},

    OPT_R_OPTIONS,

    OPT_V_OPTIONS,

    {"aes128-wrap", OPT_AES128_WRAP, '-', "Use AES128 to wrap key"},

    {"aes192-wrap", OPT_AES192_WRAP, '-', "Use AES192 to wrap key"},

    {"aes256-wrap", OPT_AES256_WRAP, '-', "Use AES256 to wrap key"},

# ifndef OPENSSL_NO_DES

    {"des3-wrap", OPT_3DES_WRAP, '-', "Use 3DES-EDE to wrap key"},

# endif

# ifndef OPENSSL_NO_ENGINE

    {"engine", OPT_ENGINE, 's', "Use engine e, possibly a hardware device"},

# endif

    {NULL}

};

int cms_main(int argc, char **argv)

{

    ASN1_OBJECT *econtent_type = NULL;

    BIO *in = NULL, *out = NULL, *indata = NULL, *rctin = NULL;

    CMS_ContentInfo *cms = NULL, *rcms = NULL;

    CMS_ReceiptRequest *rr = NULL;

    ENGINE *e = NULL;

    EVP_PKEY *key = NULL;

    const EVP_CIPHER *cipher = NULL, *wrap_cipher = NULL;

    const EVP_MD *sign_md = NULL;

    STACK_OF(OPENSSL_STRING) *rr_to = NULL, *rr_from = NULL;

    STACK_OF(OPENSSL_STRING) *sksigners = NULL, *skkeys = NULL;

    STACK_OF(X509) *encerts = NULL, *other = NULL;

    X509 *cert = NULL, *recip = NULL, *signer = NULL;

    X509_STORE *store = NULL;

    X509_VERIFY_PARAM *vpm = NULL;

    char *certfile = NULL, *keyfile = NULL, *contfile = NULL;

    const char *CAfile = NULL, *CApath = NULL;

    char *certsoutfile = NULL;

    int noCAfile = 0, noCApath = 0;

    char *infile = NULL, *outfile = NULL, *rctfile = NULL;

    char *passinarg = NULL, *passin = NULL, *signerfile = NULL, *recipfile = NULL;

    char *to = NULL, *from = NULL, *subject = NULL, *prog;

    cms_key_param *key_first = NULL, *key_param = NULL;

    int flags = CMS_DETACHED, noout = 0, print = 0, keyidx = -1, vpmtouched = 0;

    int informat = FORMAT_SMIME, outformat = FORMAT_SMIME;

    int operation = 0, ret = 1, rr_print = 0, rr_allorfirst = -1;

    int verify_retcode = 0, rctformat = FORMAT_SMIME, keyform = FORMAT_PEM;

    size_t secret_keylen = 0, secret_keyidlen = 0;

    unsigned char *pwri_pass = NULL, *pwri_tmp = NULL;

    unsigned char *secret_key = NULL, *secret_keyid = NULL;

    long ltmp;

    const char *mime_eol = "\n";

    OPTION_CHOICE o;

    if ((vpm = X509_VERIFY_PARAM_new()) == NULL)

        return 1;

    prog = opt_init(argc, argv, cms_options);

    while ((o = opt_next()) != OPT_EOF) {

        switch (o) {

        case OPT_EOF:

        case OPT_ERR:

 opthelp:

            BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);

            goto end;

        case OPT_HELP:

            opt_help(cms_options);

            ret = 0;

            goto end;

        case OPT_INFORM:

            if (!opt_format(opt_arg(), OPT_FMT_PDS, &informat))

                goto opthelp;

            break;

        case OPT_OUTFORM:

            if (!opt_format(opt_arg(), OPT_FMT_PDS, &outformat))

                goto opthelp;

            break;

        case OPT_OUT:

            outfile = opt_arg();

            break;

        case OPT_ENCRYPT:

            operation = SMIME_ENCRYPT;

            break;

        case OPT_DECRYPT:

            operation = SMIME_DECRYPT;

            break;

        case OPT_SIGN:

            operation = SMIME_SIGN;

            break;

        case OPT_SIGN_RECEIPT:

            operation = SMIME_SIGN_RECEIPT;

            break;

        case OPT_RESIGN:

            operation = SMIME_RESIGN;

            break;

        case OPT_VERIFY:

            operation = SMIME_VERIFY;

            break;

        case OPT_VERIFY_RETCODE:

            verify_retcode = 1;

            break;

        case OPT_VERIFY_RECEIPT:

            operation = SMIME_VERIFY_RECEIPT;

            rctfile = opt_arg();

            break;

        case OPT_CMSOUT:

            operation = SMIME_CMSOUT;

            break;

        case OPT_DATA_OUT:

            operation = SMIME_DATAOUT;

            break;

        case OPT_DATA_CREATE:

            operation = SMIME_DATA_CREATE;

            break;

        case OPT_DIGEST_VERIFY:

            operation = SMIME_DIGEST_VERIFY;

            break;

        case OPT_DIGEST_CREATE:

            operation = SMIME_DIGEST_CREATE;

            break;

        case OPT_COMPRESS:

            operation = SMIME_COMPRESS;

            break;

        case OPT_UNCOMPRESS:

            operation = SMIME_UNCOMPRESS;

            break;

        case OPT_ED_DECRYPT:

            operation = SMIME_ENCRYPTED_DECRYPT;

            break;

        case OPT_ED_ENCRYPT:

            operation = SMIME_ENCRYPTED_ENCRYPT;

            break;

        case OPT_DEBUG_DECRYPT:

            flags |= CMS_DEBUG_DECRYPT;

            break;

        case OPT_TEXT:

            flags |= CMS_TEXT;

            break;

        case OPT_ASCIICRLF:

            flags |= CMS_ASCIICRLF;

            break;

        case OPT_NOINTERN:

            flags |= CMS_NOINTERN;

            break;

        case OPT_NOVERIFY:

            flags |= CMS_NO_SIGNER_CERT_VERIFY;

            break;

        case OPT_NOCERTS:

            flags |= CMS_NOCERTS;

            break;

        case OPT_NOATTR:

            flags |= CMS_NOATTR;

            break;

        case OPT_NODETACH:

            flags &= ~CMS_DETACHED;

            break;

        case OPT_NOSMIMECAP:

            flags |= CMS_NOSMIMECAP;

            break;

        case OPT_BINARY:

            flags |= CMS_BINARY;

            break;

        case OPT_KEYID:

            flags |= CMS_USE_KEYID;

            break;

        case OPT_NOSIGS:

            flags |= CMS_NOSIGS;

            break;

        case OPT_NO_CONTENT_VERIFY:

            flags |= CMS_NO_CONTENT_VERIFY;

            break;

        case OPT_NO_ATTR_VERIFY:

            flags |= CMS_NO_ATTR_VERIFY;

            break;

        case OPT_INDEF:

            flags |= CMS_STREAM;

            break;

        case OPT_NOINDEF:

            flags &= ~CMS_STREAM;

            break;

        case OPT_CRLFEOL:

            mime_eol = "\r\n";

            flags |= CMS_CRLFEOL;

            break;

        case OPT_NOOUT:

            noout = 1;

            break;

        case OPT_RR_PRINT:

            rr_print = 1;

            break;

        case OPT_RR_ALL:

            rr_allorfirst = 0;

            break;

        case OPT_RR_FIRST:

            rr_allorfirst = 1;

            break;

        case OPT_RCTFORM:

            if (rctformat == FORMAT_SMIME)

                rcms = SMIME_read_CMS(rctin, NULL);

            else if (rctformat == FORMAT_PEM)

                rcms = PEM_read_bio_CMS(rctin, NULL, NULL, NULL);

            else if (rctformat == FORMAT_ASN1)

                if (!opt_format(opt_arg(),

                                OPT_FMT_PEMDER | OPT_FMT_SMIME, &rctformat))

                    goto opthelp;

            break;

        case OPT_CERTFILE:

            certfile = opt_arg();

            break;

        case OPT_CAFILE:

            CAfile = opt_arg();

            break;

        case OPT_CAPATH:

            CApath = opt_arg();

            break;

        case OPT_NOCAFILE:

            noCAfile = 1;

            break;

        case OPT_NOCAPATH:

            noCApath = 1;

            break;

        case OPT_IN:

            infile = opt_arg();

            break;

        case OPT_CONTENT:

            contfile = opt_arg();

            break;

        case OPT_RR_FROM:

            if (rr_from == NULL

                && (rr_from = sk_OPENSSL_STRING_new_null()) == NULL)

                goto end;

            sk_OPENSSL_STRING_push(rr_from, opt_arg());

            break;

        case OPT_RR_TO:

            if (rr_to == NULL

                && (rr_to = sk_OPENSSL_STRING_new_null()) == NULL)

                goto end;

            sk_OPENSSL_STRING_push(rr_to, opt_arg());

            break;

        case OPT_PRINT:

            noout = print = 1;

            break;

        case OPT_SECRETKEY:

            if (secret_key != NULL) {

                BIO_printf(bio_err, "Invalid key (supplied twice) %s\n",

                           opt_arg());

                goto opthelp;

            }

            secret_key = OPENSSL_hexstr2buf(opt_arg(), &ltmp);

            if (secret_key == NULL) {

                BIO_printf(bio_err, "Invalid key %s\n", opt_arg());

                goto end;

            }

            secret_keylen = (size_t)ltmp;

            break;

        case OPT_SECRETKEYID:

            if (secret_keyid != NULL) {

                BIO_printf(bio_err, "Invalid id (supplied twice) %s\n",

                           opt_arg());

                goto opthelp;

            }

            secret_keyid = OPENSSL_hexstr2buf(opt_arg(), &ltmp);

            if (secret_keyid == NULL) {

                BIO_printf(bio_err, "Invalid id %s\n", opt_arg());

                goto opthelp;

            }

            secret_keyidlen = (size_t)ltmp;

            break;

        case OPT_PWRI_PASSWORD:

            pwri_pass = (unsigned char *)opt_arg();

            break;

        case OPT_ECONTENT_TYPE:

            if (econtent_type != NULL) {

                BIO_printf(bio_err, "Invalid OID (supplied twice) %s\n",

                           opt_arg());

                goto opthelp;

            }

            econtent_type = OBJ_txt2obj(opt_arg(), 0);

            if (econtent_type == NULL) {

                BIO_printf(bio_err, "Invalid OID %s\n", opt_arg());

                goto opthelp;

            }

            break;

        case OPT_ENGINE:

            e = setup_engine(opt_arg(), 0);

            break;

        case OPT_PASSIN:

            passinarg = opt_arg();

            break;

        case OPT_TO:

            to = opt_arg();

            break;

        case OPT_FROM:

            from = opt_arg();

            break;

        case OPT_SUBJECT:

            subject = opt_arg();

            break;

        case OPT_CERTSOUT:

            certsoutfile = opt_arg();

            break;

        case OPT_MD:

            if (!opt_md(opt_arg(), &sign_md))

                goto end;

            break;

        case OPT_SIGNER:

            /* If previous -signer argument add signer to list */

            if (signerfile != NULL) {

                if (sksigners == NULL

                    && (sksigners = sk_OPENSSL_STRING_new_null()) == NULL)

                    goto end;

                sk_OPENSSL_STRING_push(sksigners, signerfile);

                if (keyfile == NULL)

                    keyfile = signerfile;

                if (skkeys == NULL

                    && (skkeys = sk_OPENSSL_STRING_new_null()) == NULL)

                    goto end;

                sk_OPENSSL_STRING_push(skkeys, keyfile);

                keyfile = NULL;

            }

            signerfile = opt_arg();

            break;

        case OPT_INKEY:

            /* If previous -inkey argument add signer to list */

            if (keyfile != NULL) {

                if (signerfile == NULL) {

                    BIO_puts(bio_err, "Illegal -inkey without -signer\n");

                    goto end;

                }

                if (sksigners == NULL

                    && (sksigners = sk_OPENSSL_STRING_new_null()) == NULL)

                    goto end;

                sk_OPENSSL_STRING_push(sksigners, signerfile);

                signerfile = NULL;

                if (skkeys == NULL

                    && (skkeys = sk_OPENSSL_STRING_new_null()) == NULL)

                    goto end;

                sk_OPENSSL_STRING_push(skkeys, keyfile);

            }

            keyfile = opt_arg();

            break;

        case OPT_KEYFORM:

            if (!opt_format(opt_arg(), OPT_FMT_ANY, &keyform))

                goto opthelp;

            break;

        case OPT_RECIP:

            if (operation == SMIME_ENCRYPT) {

                if (encerts == NULL && (encerts = sk_X509_new_null()) == NULL)

                    goto end;

                cert = load_cert(opt_arg(), FORMAT_PEM,

                                 "recipient certificate file");

                if (cert == NULL)

                    goto end;

                sk_X509_push(encerts, cert);

                cert = NULL;

            } else {

                recipfile = opt_arg();

            }

            break;

        case OPT_CIPHER:

            if (!opt_cipher(opt_unknown(), &cipher))

                goto end;

            break;

        case OPT_KEYOPT:

            keyidx = -1;

            if (operation == SMIME_ENCRYPT) {

                if (encerts != NULL)

                    keyidx += sk_X509_num(encerts);

            } else {

                if (keyfile != NULL || signerfile != NULL)

                    keyidx++;

                if (skkeys != NULL)

                    keyidx += sk_OPENSSL_STRING_num(skkeys);

            }

            if (keyidx < 0) {

                BIO_printf(bio_err, "No key specified\n");

                goto opthelp;

            }

            if (key_param == NULL || key_param->idx != keyidx) {

                cms_key_param *nparam;

                nparam = app_malloc(sizeof(*nparam), "key param buffer");

                nparam->idx = keyidx;

                if ((nparam->param = sk_OPENSSL_STRING_new_null()) == NULL)

                    goto end;

                nparam->next = NULL;

                if (key_first == NULL)

                    key_first = nparam;

                else

                    key_param->next = nparam;

                key_param = nparam;

            }

            sk_OPENSSL_STRING_push(key_param->param, opt_arg());

            break;

        case OPT_V_CASES:

            if (!opt_verify(o, vpm))

                goto end;

            vpmtouched++;

            break;

        case OPT_R_CASES:

            if (!opt_rand(o))

                goto end;

            break;

        case OPT_3DES_WRAP:

# ifndef OPENSSL_NO_DES

            wrap_cipher = EVP_des_ede3_wrap();

# endif

            break;

        case OPT_AES128_WRAP:

            wrap_cipher = EVP_aes_128_wrap();

            break;

        case OPT_AES192_WRAP:

            wrap_cipher = EVP_aes_192_wrap();

            break;

        case OPT_AES256_WRAP:

            wrap_cipher = EVP_aes_256_wrap();

            break;

        }

    }

    argc = opt_num_rest();

    argv = opt_rest();

    if ((rr_allorfirst != -1 || rr_from != NULL) && rr_to == NULL) {

        BIO_puts(bio_err, "No Signed Receipts Recipients\n");

        goto opthelp;

    }

    if (!(operation & SMIME_SIGNERS) && (rr_to != NULL || rr_from != NULL)) {

        BIO_puts(bio_err, "Signed receipts only allowed with -sign\n");

        goto opthelp;

    }

    if (!(operation & SMIME_SIGNERS) && (skkeys != NULL || sksigners != NULL)) {

        BIO_puts(bio_err, "Multiple signers or keys not allowed\n");

        goto opthelp;

    }

    if (operation & SMIME_SIGNERS) {

        if (keyfile != NULL && signerfile == NULL) {

            BIO_puts(bio_err, "Illegal -inkey without -signer\n");

            goto opthelp;

        }

        /* Check to see if any final signer needs to be appended */

        if (signerfile != NULL) {

            if (sksigners == NULL

                && (sksigners = sk_OPENSSL_STRING_new_null()) == NULL)

                goto end;

            sk_OPENSSL_STRING_push(sksigners, signerfile);

            if (skkeys == NULL && (skkeys = sk_OPENSSL_STRING_new_null()) == NULL)

                goto end;

            if (keyfile == NULL)

                keyfile = signerfile;

            sk_OPENSSL_STRING_push(skkeys, keyfile);

        }

        if (sksigners == NULL) {

            BIO_printf(bio_err, "No signer certificate specified\n");

            goto opthelp;

        }

        signerfile = NULL;

        keyfile = NULL;

    } else if (operation == SMIME_DECRYPT) {

        if (recipfile == NULL && keyfile == NULL

            && secret_key == NULL && pwri_pass == NULL) {

            BIO_printf(bio_err,

                       "No recipient certificate or key specified\n");

            goto opthelp;

        }

    } else if (operation == SMIME_ENCRYPT) {

        if (*argv == NULL && secret_key == NULL

            && pwri_pass == NULL && encerts == NULL) {

            BIO_printf(bio_err, "No recipient(s) certificate(s) specified\n");

            goto opthelp;

        }

    } else if (!operation) {

        BIO_printf(bio_err, "No operation option (-encrypt|-decrypt|-sign|-verify|...) specified.\n");

        goto opthelp;

    }

    if (!app_passwd(passinarg, NULL, &passin, NULL)) {

        BIO_printf(bio_err, "Error getting password\n");

        goto end;

    }

    ret = 2;

    if (!(operation & SMIME_SIGNERS))

        flags &= ~CMS_DETACHED;

    if (!(operation & SMIME_OP))

        if (flags & CMS_BINARY)

            outformat = FORMAT_BINARY;

    if (!(operation & SMIME_IP))

        if (flags & CMS_BINARY)

            informat = FORMAT_BINARY;

    if (operation == SMIME_ENCRYPT) {

        if (!cipher) {

# ifndef OPENSSL_NO_DES

            cipher = EVP_des_ede3_cbc();

# else

            BIO_printf(bio_err, "No cipher selected\n");

            goto end;

# endif

        }

        if (secret_key && !secret_keyid) {

            BIO_printf(bio_err, "No secret key id\n");

            goto end;

        }

        if (*argv && encerts == NULL)

            if ((encerts = sk_X509_new_null()) == NULL)

                goto end;

        while (*argv) {

            if ((cert = load_cert(*argv, FORMAT_PEM,

                                  "recipient certificate file")) == NULL)

                goto end;

            sk_X509_push(encerts, cert);

            cert = NULL;

            argv++;

        }

    }

    if (certfile != NULL) {

        if (!load_certs(certfile, &other, FORMAT_PEM, NULL,

                        "certificate file")) {

            ERR_print_errors(bio_err);

            goto end;

        }

    }

    if (recipfile != NULL && (operation == SMIME_DECRYPT)) {

        if ((recip = load_cert(recipfile, FORMAT_PEM,

                               "recipient certificate file")) == NULL) {

            ERR_print_errors(bio_err);

            goto end;

        }

    }

    if (operation == SMIME_SIGN_RECEIPT) {

        if ((signer = load_cert(signerfile, FORMAT_PEM,

                                "receipt signer certificate file")) == NULL) {

            ERR_print_errors(bio_err);

            goto end;

        }

    }

    if (operation == SMIME_DECRYPT) {

        if (keyfile == NULL)

            keyfile = recipfile;

    } else if ((operation == SMIME_SIGN) || (operation == SMIME_SIGN_RECEIPT)) {

        if (keyfile == NULL)

            keyfile = signerfile;

    } else {

        keyfile = NULL;

    }

    if (keyfile != NULL) {

        key = load_key(keyfile, keyform, 0, passin, e, "signing key file");

        if (key == NULL)

            goto end;

    }

    in = bio_open_default(infile, 'r', informat);

    if (in == NULL)

        goto end;

    if (operation & SMIME_IP) {

        if (informat == FORMAT_SMIME) {

            cms = SMIME_read_CMS(in, &indata);

        } else if (informat == FORMAT_PEM) {

            cms = PEM_read_bio_CMS(in, NULL, NULL, NULL);

        } else if (informat == FORMAT_ASN1) {

            cms = d2i_CMS_bio(in, NULL);

        } else {

            BIO_printf(bio_err, "Bad input format for CMS file\n");

            goto end;

        }

        if (cms == NULL) {

            BIO_printf(bio_err, "Error reading S/MIME message\n");

            goto end;

        }

        if (contfile != NULL) {

            BIO_free(indata);

            if ((indata = BIO_new_file(contfile, "rb")) == NULL) {

                BIO_printf(bio_err, "Can't read content file %s\n", contfile);

                goto end;

            }

        }

        if (certsoutfile != NULL) {

            STACK_OF(X509) *allcerts;

            allcerts = CMS_get1_certs(cms);

            if (!save_certs(certsoutfile, allcerts)) {

                BIO_printf(bio_err,

                           "Error writing certs to %s\n", certsoutfile);

                ret = 5;

                goto end;

            }

            sk_X509_pop_free(allcerts, X509_free);

        }

    }

    if (rctfile != NULL) {

        char *rctmode = (rctformat == FORMAT_ASN1) ? "rb" : "r";

        if ((rctin = BIO_new_file(rctfile, rctmode)) == NULL) {

            BIO_printf(bio_err, "Can't open receipt file %s\n", rctfile);

            goto end;

        }

        if (rctformat == FORMAT_SMIME) {

            rcms = SMIME_read_CMS(rctin, NULL);

        } else if (rctformat == FORMAT_PEM) {

            rcms = PEM_read_bio_CMS(rctin, NULL, NULL, NULL);

        } else if (rctformat == FORMAT_ASN1) {

            rcms = d2i_CMS_bio(rctin, NULL);

        } else {

            BIO_printf(bio_err, "Bad input format for receipt\n");

            goto end;

        }

        if (rcms == NULL) {

            BIO_printf(bio_err, "Error reading receipt\n");

            goto end;

        }

    }

    out = bio_open_default(outfile, 'w', outformat);

    if (out == NULL)

        goto end;

    if ((operation == SMIME_VERIFY) || (operation == SMIME_VERIFY_RECEIPT)) {

        if ((store = setup_verify(CAfile, CApath, noCAfile, noCApath)) == NULL)

            goto end;

        X509_STORE_set_verify_cb(store, cms_cb);

        if (vpmtouched)

            X509_STORE_set1_param(store, vpm);

    }

    ret = 3;

    if (operation == SMIME_DATA_CREATE) {

        cms = CMS_data_create(in, flags);

    } else if (operation == SMIME_DIGEST_CREATE) {

        cms = CMS_digest_create(in, sign_md, flags);

    } else if (operation == SMIME_COMPRESS) {

        cms = CMS_compress(in, -1, flags);

    } else if (operation == SMIME_ENCRYPT) {

        int i;

        flags |= CMS_PARTIAL;

        cms = CMS_encrypt(NULL, in, cipher, flags);

        if (cms == NULL)

            goto end;

        for (i = 0; i < sk_X509_num(encerts); i++) {

            CMS_RecipientInfo *ri;

            cms_key_param *kparam;

            int tflags = flags;

            X509 *x = sk_X509_value(encerts, i);

            for (kparam = key_first; kparam; kparam = kparam->next) {

                if (kparam->idx == i) {

                    tflags |= CMS_KEY_PARAM;

                    break;

                }

            }

            ri = CMS_add1_recipient_cert(cms, x, tflags);

            if (ri == NULL)

                goto end;

            if (kparam != NULL) {

                EVP_PKEY_CTX *pctx;

                pctx = CMS_RecipientInfo_get0_pkey_ctx(ri);

                if (!cms_set_pkey_param(pctx, kparam->param))

                    goto end;

            }

            if (CMS_RecipientInfo_type(ri) == CMS_RECIPINFO_AGREE

                && wrap_cipher) {

                EVP_CIPHER_CTX *wctx;

                wctx = CMS_RecipientInfo_kari_get0_ctx(ri);

                EVP_EncryptInit_ex(wctx, wrap_cipher, NULL, NULL, NULL);

            }

        }

        if (secret_key != NULL) {

            if (!CMS_add0_recipient_key(cms, NID_undef,

                                        secret_key, secret_keylen,

                                        secret_keyid, secret_keyidlen,

                                        NULL, NULL, NULL))

                goto end;

            /* NULL these because call absorbs them */

            secret_key = NULL;

            secret_keyid = NULL;

        }

        if (pwri_pass != NULL) {

            pwri_tmp = (unsigned char *)OPENSSL_strdup((char *)pwri_pass);

            if (pwri_tmp == NULL)

                goto end;

            if (CMS_add0_recipient_password(cms,

                                            -1, NID_undef, NID_undef,

                                            pwri_tmp, -1, NULL) == NULL)

                goto end;

            pwri_tmp = NULL;

        }

        if (!(flags & CMS_STREAM)) {

            if (!CMS_final(cms, in, NULL, flags))

                goto end;

        }

    } else if (operation == SMIME_ENCRYPTED_ENCRYPT) {

        cms = CMS_EncryptedData_encrypt(in, cipher,

                                        secret_key, secret_keylen, flags);

    } else if (operation == SMIME_SIGN_RECEIPT) {

        CMS_ContentInfo *srcms = NULL;

        STACK_OF(CMS_SignerInfo) *sis;

        CMS_SignerInfo *si;

        sis = CMS_get0_SignerInfos(cms);

        if (sis == NULL)