/*
 * Copyright 2008-2025 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the Apache License 2.0 (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

/* CMS utility function */

#include <stdio.h>
#include <string.h>
#include "apps.h"
#include "progs.h"

#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 0x100
#define SMIME_IP 0x200
#define SMIME_SIGNERS 0x400
#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_RESIGN (5 | SMIME_IP | SMIME_OP | SMIME_SIGNERS)
#define SMIME_SIGN_RECEIPT (6 | SMIME_IP | SMIME_OP)
#define SMIME_VERIFY_RECEIPT (7 | SMIME_IP)
#define SMIME_DIGEST_CREATE (8 | SMIME_OP)
#define SMIME_DIGEST_VERIFY (9 | SMIME_IP)
#define SMIME_COMPRESS (10 | SMIME_OP)
#define SMIME_UNCOMPRESS (11 | SMIME_IP)
#define SMIME_ENCRYPTED_ENCRYPT (12 | SMIME_OP)
#define SMIME_ENCRYPTED_DECRYPT (13 | SMIME_IP)
#define SMIME_DATA_CREATE (14 | SMIME_OP)
#define SMIME_DATA_OUT (15 | SMIME_IP)
#define SMIME_CMSOUT (16 | SMIME_IP | SMIME_OP)

static int verify_err = 0;

typedef struct cms_key_param_st cms_key_param;
typedef struct cms_recip_opt_st cms_recip_opt;

struct cms_key_param_st {
    int idx;
    STACK_OF(OPENSSL_STRING) *param;
    cms_key_param *next;
};

struct cms_recip_opt_st {
    int idx;
    const char *kdf;
    unsigned char *ukm_data;
    long ukm_data_length;
    cms_recip_opt *next;
};

typedef enum OPTION_choice {
    OPT_COMMON,
    OPT_INFORM,
    OPT_OUTFORM,
    OPT_IN,
    OPT_OUT,
    OPT_ENCRYPT,
    OPT_DECRYPT,
    OPT_SIGN,
    OPT_CADES,
    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,
    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_NO_SIGNING_TIME,
    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_CASTORE,
    OPT_NOCAPATH,
    OPT_NOCAFILE,
    OPT_NOCASTORE,
    OPT_CONTENT,
    OPT_PRINT,
    OPT_NAMEOPT,
    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_WRAP,
    OPT_R_ENUM,
    OPT_PROV_ENUM,
    OPT_CONFIG,
    OPT_V_ENUM,
    OPT_CIPHER,
    OPT_KEKCIPHER,
    OPT_ORIGINATOR,
    OPT_RECIP_UKM,
    OPT_RECIP_KDF
} OPTION_CHOICE;

const OPTIONS cms_options[] = {
    { OPT_HELP_STR, 1, '-', "Usage: %s [options] [cert...]\n" },
    { "help", OPT_HELP, '-', "Display this summary" },

    OPT_SECTION("General"),
    { "in", OPT_IN, '<', "Input file" },
    { "out", OPT_OUT, '>', "Output file" },
    OPT_CONFIG_OPTION,

    OPT_SECTION("Operation"),
    { "encrypt", OPT_ENCRYPT, '-', "Encrypt message" },
    { "decrypt", OPT_DECRYPT, '-', "Decrypt encrypted message" },
    { "sign", OPT_SIGN, '-', "Sign message" },
    { "verify", OPT_VERIFY, '-', "Verify signed message" },
    { "resign", OPT_RESIGN, '-', "Resign a signed message" },
    { "sign_receipt", OPT_SIGN_RECEIPT, '-',
        "Generate a signed receipt for a message" },
    { "verify_receipt", OPT_VERIFY_RECEIPT, '<',
        "Verify receipts; exit if receipt signatures do not verify" },
    { "digest", OPT_DIGEST, 's', "Sign a pre-computed digest in hex notation" },
    { "digest_create", OPT_DIGEST_CREATE, '-',
        "Create a CMS \"DigestedData\" object" },
    { "digest_verify", OPT_DIGEST_VERIFY, '-',
        "Verify a CMS \"DigestedData\" object and output it" },
    { "compress", OPT_COMPRESS, '-', "Create a CMS \"CompressedData\" object" },
    { "uncompress", OPT_UNCOMPRESS, '-',
        "Uncompress a CMS \"CompressedData\" object" },
    { "EncryptedData_encrypt", OPT_ED_ENCRYPT, '-',
        "Create CMS \"EncryptedData\" object using symmetric key" },
    { "EncryptedData_decrypt", OPT_ED_DECRYPT, '-',
        "Decrypt CMS \"EncryptedData\" object using symmetric key" },
    { "data_create", OPT_DATA_CREATE, '-', "Create a CMS \"Data\" object" },
    { "data_out", OPT_DATA_OUT, '-', "Copy CMS \"Data\" object to output" },
    { "cmsout", OPT_CMSOUT, '-', "Output CMS structure" },

    OPT_SECTION("File format"),
    { "inform", OPT_INFORM, 'c', "Input format SMIME (default), PEM or DER" },
    { "outform", OPT_OUTFORM, 'c',
        "Output format SMIME (default), PEM or DER" },
    { "rctform", OPT_RCTFORM, 'F', "Receipt file format" },
    { "stream", OPT_INDEF, '-', "Enable CMS streaming" },
    { "indef", OPT_INDEF, '-', "Same as -stream" },
    { "noindef", OPT_NOINDEF, '-', "Disable CMS streaming" },
    { "binary", OPT_BINARY, '-',
        "Treat input as binary: do not translate to canonical form" },
    { "crlfeol", OPT_CRLFEOL, '-',
        "Use CRLF as EOL termination instead of LF only" },
    { "asciicrlf", OPT_ASCIICRLF, '-',
        "Perform CRLF canonicalisation when signing" },

    OPT_SECTION("Keys and passwords"),
    { "pwri_password", OPT_PWRI_PASSWORD, 's',
        "Specific password for recipient" },
    { "secretkey", OPT_SECRETKEY, 's',
        "Use specified hex-encoded key to decrypt/encrypt recipients or content" },
    { "secretkeyid", OPT_SECRETKEYID, 's',
        "Identity of the -secretkey for CMS \"KEKRecipientInfo\" object" },
    { "inkey", OPT_INKEY, 's',
        "Input private key (if not signer or recipient)" },
    { "passin", OPT_PASSIN, 's', "Input file pass phrase source" },
    { "keyopt", OPT_KEYOPT, 's', "Set public key parameters as n:v pairs" },
    { "keyform", OPT_KEYFORM, 'f', "Input private key format (DER/PEM)" },
    OPT_PROV_OPTIONS,
    OPT_R_OPTIONS,

    OPT_SECTION("Encryption and decryption"),
    { "originator", OPT_ORIGINATOR, 's', "Originator certificate file" },
    { "recip", OPT_RECIP, '<', "Recipient cert file" },
    { "cert...", OPT_PARAM, '.',
        "Recipient certs (optional; used only when encrypting)" },
    { "", OPT_CIPHER, '-',
        "The encryption algorithm to use (any supported cipher)" },
    { "kekcipher", OPT_KEKCIPHER, 's',
        "The key encryption algorithm to use" },
    { "wrap", OPT_WRAP, 's',
        "Key wrap algorithm to use when encrypting with key agreement or key encapsulation" },
    { "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" },
    { "des3-wrap", OPT_3DES_WRAP, '-', "Use 3DES-EDE to wrap key" },
    { "debug_decrypt", OPT_DEBUG_DECRYPT, '-',
        "Disable MMA protection, return error if no recipient found (see doc)" },
    { "recip_kdf", OPT_RECIP_KDF, 's', "Set KEMRecipientInfo KDF for current recipient" },
    { "recip_ukm", OPT_RECIP_UKM, 's', "KEMRecipientInfo user keying material for current recipient, in hex notation" },

    OPT_SECTION("Signing"),
    { "md", OPT_MD, 's', "Digest algorithm to use" },
    { "signer", OPT_SIGNER, 's', "Signer certificate input file" },
    { "certfile", OPT_CERTFILE, '<',
        "Extra signer and intermediate CA certificates to include when signing" },
    { OPT_MORE_STR, 0, 0,
        "or to use as preferred signer certs and for chain building when verifying" },
    { "cades", OPT_CADES, '-',
        "Include signingCertificate attribute (CAdES-BES)" },
    { "nodetach", OPT_NODETACH, '-', "Use opaque signing" },
    { "nocerts", OPT_NOCERTS, '-',
        "Don't include signer's certificate when signing" },
    { "noattr", OPT_NOATTR, '-', "Don't include any signed attributes" },
    { "nosmimecap", OPT_NOSMIMECAP, '-', "Omit the SMIMECapabilities attribute" },
    { "no_signing_time", OPT_NO_SIGNING_TIME, '-',
        "Omit the signing time attribute" },
    { "receipt_request_all", OPT_RR_ALL, '-',
        "When signing, create a receipt request for all recipients" },
    { "receipt_request_first", OPT_RR_FIRST, '-',
        "When signing, create a receipt request for first recipient" },
    { "receipt_request_from", OPT_RR_FROM, 's',
        "Create signed receipt request with specified email address" },
    { "receipt_request_to", OPT_RR_TO, 's',
        "Create signed receipt targeted to specified address" },

    OPT_SECTION("Verification"),
    { "signer", OPT_DUP, 's', "Signer certificate(s) output file" },
    { "content", OPT_CONTENT, '<',
        "Supply or override content for detached signature" },
    { "no_content_verify", OPT_NO_CONTENT_VERIFY, '-',
        "Do not verify signed content signatures" },
    { "no_attr_verify", OPT_NO_ATTR_VERIFY, '-',
        "Do not verify signed attribute signatures" },
    { "nosigs", OPT_NOSIGS, '-', "Don't verify message signature" },
    { "noverify", OPT_NOVERIFY, '-', "Don't verify signers certificate" },
    { "nointern", OPT_NOINTERN, '-',
        "Don't search certificates in message for signer" },
    { "cades", OPT_DUP, '-', "Check signingCertificate (CAdES-BES)" },
    { "verify_retcode", OPT_VERIFY_RETCODE, '-',
        "Exit non-zero on verification failure" },
    { "CAfile", OPT_CAFILE, '<', "Trusted certificates file" },
    { "CApath", OPT_CAPATH, '/', "Trusted certificates directory" },
    { "CAstore", OPT_CASTORE, ':', "Trusted certificates store URI" },
    { "no-CAfile", OPT_NOCAFILE, '-',
        "Do not load the default certificates file" },
    { "no-CApath", OPT_NOCAPATH, '-',
        "Do not load certificates from the default certificates directory" },
    { "no-CAstore", OPT_NOCASTORE, '-',
        "Do not load certificates from the default certificates store" },

    OPT_SECTION("Output"),
    { "keyid", OPT_KEYID, '-', "Use subject key identifier" },
    { "econtent_type", OPT_ECONTENT_TYPE, 's', "OID for external content" },
    { "text", OPT_TEXT, '-', "Include or delete text MIME headers" },
    { "certsout", OPT_CERTSOUT, '>', "Certificate output file" },
    { "to", OPT_TO, 's', "To address" },
    { "from", OPT_FROM, 's', "From address" },
    { "subject", OPT_SUBJECT, 's', "Subject" },

    OPT_SECTION("Printing"),
    { "noout", OPT_NOOUT, '-',
        "For the -cmsout operation do not output the parsed CMS structure" },
    { "print", OPT_PRINT, '-',
        "For the -cmsout operation print out all fields of the CMS structure" },
    { "nameopt", OPT_NAMEOPT, 's',
        "For the -print option specifies various strings printing options" },
    { "receipt_request_print", OPT_RR_PRINT, '-', "Print CMS Receipt Request" },

    OPT_V_OPTIONS,
    { NULL }
};

static CMS_ContentInfo *load_content_info(int informat, BIO *in, int flags,
    BIO **indata, const char *name)
{
    CMS_ContentInfo *ret, *ci;

    ret = CMS_ContentInfo_new_ex(app_get0_libctx(), app_get0_propq());
    if (ret == NULL) {
        BIO_puts(bio_err, "Error allocating CMS_contentinfo\n");
        return NULL;
    }
    switch (informat) {
    case FORMAT_SMIME:
        ci = SMIME_read_CMS_ex(in, flags, indata, &ret);
        break;
    case FORMAT_PEM:
        ci = PEM_read_bio_CMS(in, &ret, NULL, NULL);
        break;
    case FORMAT_ASN1:
        ci = d2i_CMS_bio(in, &ret);
        break;
    default:
        BIO_printf(bio_err, "Bad input format for %s\n", name);
        goto err;
    }
    if (ci == NULL) {
        BIO_printf(bio_err, "Error reading %s Content Info\n", name);
        goto err;
    }
    return ret;
err:
    CMS_ContentInfo_free(ret);
    return NULL;
}

static cms_recip_opt *alloc_recip_opt(int recipidx)
{
    cms_recip_opt *opt;

    opt = app_malloc(sizeof(*opt), "recipient options buffer");
    opt->idx = recipidx;
    opt->next = NULL;
    opt->kdf = NULL;
    opt->ukm_data = NULL;
    opt->ukm_data_length = 0;
    return opt;
}

int cms_main(int argc, char **argv)
{
    CONF *conf = NULL;
    ASN1_OBJECT *econtent_type = NULL;
    BIO *in = NULL, *out = NULL, *indata = NULL, *rctin = NULL;
    CMS_ContentInfo *cms = NULL, *rcms = NULL;
    CMS_ReceiptRequest *rr = NULL;
    EVP_PKEY *key = NULL;
    EVP_CIPHER *cipher = NULL, *wrap_cipher = NULL, *kekcipher = NULL;
    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 = sk_X509_new_null(), *other = NULL;
    X509 *cert = NULL, *recip = NULL, *signer = NULL, *originator = NULL;
    X509_STORE *store = NULL;
    X509_VERIFY_PARAM *vpm = X509_VERIFY_PARAM_new();
    char *certfile = NULL, *keyfile = NULL, *contfile = NULL;
    const char *CAfile = NULL, *CApath = NULL, *CAstore = NULL;
    char *certsoutfile = NULL, *digestname = NULL, *wrapname = NULL;
    int noCAfile = 0, noCApath = 0, noCAstore = 0;
    char *digesthex = NULL;
    unsigned char *digestbin = NULL;
    long digestlen = 0;
    char *infile = NULL, *outfile = NULL, *rctfile = NULL;
    char *passinarg = NULL, *passin = NULL, *signerfile = NULL;
    char *originatorfile = NULL, *recipfile = NULL;
    char *ciphername = NULL, *kekciphername = NULL;
    char *to = NULL, *from = NULL, *subject = NULL, *prog;
    cms_key_param *key_first = NULL, *key_param = NULL;
    int flags = CMS_DETACHED, binary_files = 0;
    int 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_UNDEF;
    size_t secret_keylen = 0, secret_keyidlen = 0;
    unsigned char *pwri_pass = NULL, *pwri_tmp = NULL;
    unsigned char *secret_key = NULL, *secret_keyid = NULL;
    cms_recip_opt *recip_first = NULL, *recip_opt = NULL;
    int recipidx = -1;
    long ltmp;
    const char *mime_eol = "\n";
    OPTION_CHOICE o;
    OSSL_LIB_CTX *libctx = app_get0_libctx();

    if (encerts == NULL || vpm == NULL)
        goto end;

    opt_set_unknown_name("cipher");
    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_VERIFY:
            operation = SMIME_VERIFY;
            break;
        case OPT_RESIGN:
            operation = SMIME_RESIGN;
            break;
        case OPT_SIGN_RECEIPT:
            operation = SMIME_SIGN_RECEIPT;
            break;
        case OPT_VERIFY_RECEIPT:
            operation = SMIME_VERIFY_RECEIPT;
            rctfile = opt_arg();
            break;
        case OPT_VERIFY_RETCODE:
            verify_retcode = 1;
            break;
        case OPT_DIGEST_CREATE:
            operation = SMIME_DIGEST_CREATE;
            break;
        case OPT_DIGEST:
            digesthex = opt_arg();
            break;
        case OPT_DIGEST_VERIFY:
            operation = SMIME_DIGEST_VERIFY;
            break;
        case OPT_COMPRESS:
            operation = SMIME_COMPRESS;
            break;
        case OPT_UNCOMPRESS:
            operation = SMIME_UNCOMPRESS;
            break;
        case OPT_ED_ENCRYPT:
            operation = SMIME_ENCRYPTED_ENCRYPT;
            break;
        case OPT_ED_DECRYPT:
            operation = SMIME_ENCRYPTED_DECRYPT;
            break;
        case OPT_DATA_CREATE:
            operation = SMIME_DATA_CREATE;
            break;
        case OPT_DATA_OUT:
            operation = SMIME_DATA_OUT;
            break;
        case OPT_CMSOUT:
            operation = SMIME_CMSOUT;
            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_NO_SIGNING_TIME:
            flags |= CMS_NO_SIGNING_TIME;
            break;
        case OPT_BINARY:
            flags |= CMS_BINARY;
            break;
        case OPT_CADES:
            flags |= CMS_CADES;
            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 (!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_CASTORE:
            CAstore = opt_arg();
            break;
        case OPT_NOCAFILE:
            noCAfile = 1;
            break;
        case OPT_NOCAPATH:
            noCApath = 1;
            break;
        case OPT_NOCASTORE:
            noCAstore = 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;
            if (sk_OPENSSL_STRING_push(rr_from, opt_arg()) <= 0)
                goto end;
            break;
        case OPT_RR_TO:
            if (rr_to == NULL
                && (rr_to = sk_OPENSSL_STRING_new_null()) == NULL)
                goto end;
            if (sk_OPENSSL_STRING_push(rr_to, opt_arg()) <= 0)
                goto end;
            break;
        case OPT_PRINT:
            noout = print = 1;
            break;
        case OPT_NAMEOPT:
            if (!set_nameopt(opt_arg()))
                goto opthelp;
            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_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:
            digestname = opt_arg();
            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;
                if (sk_OPENSSL_STRING_push(sksigners, signerfile) <= 0)
                    goto end;
                if (keyfile == NULL)
                    keyfile = signerfile;
                if (skkeys == NULL
                    && (skkeys = sk_OPENSSL_STRING_new_null()) == NULL)
                    goto end;
                if (sk_OPENSSL_STRING_push(skkeys, keyfile) <= 0)
                    goto end;
                keyfile = NULL;
            }
            signerfile = opt_arg();
            break;
        case OPT_ORIGINATOR:
            originatorfile = 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;
                if (sk_OPENSSL_STRING_push(sksigners, signerfile) <= 0)
                    goto end;
                signerfile = NULL;
                if (skkeys == NULL
                    && (skkeys = sk_OPENSSL_STRING_new_null()) == NULL)
                    goto end;
                if (sk_OPENSSL_STRING_push(skkeys, keyfile) <= 0)
                    goto end;
            }
            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) {
                cert = load_cert(opt_arg(), FORMAT_UNDEF,
                    "recipient certificate file");
                if (cert == NULL)
                    goto end;
                if (!sk_X509_push(encerts, cert))
                    goto end;
                cert = NULL;
            } else {
                recipfile = opt_arg();
            }
            break;
        case OPT_RECIP_KDF:
        case OPT_RECIP_UKM:
            recipidx = -1;
            if (operation == SMIME_ENCRYPT) {
                if (sk_X509_num(encerts) > 0)
                    recipidx += sk_X509_num(encerts);
            }
            if (recipidx < 0) {
                BIO_printf(bio_err, "No recipient specified\n");
                goto opthelp;
            }
            if (recip_opt == NULL || recip_opt->idx != recipidx) {
                cms_recip_opt *nopt;

                nopt = alloc_recip_opt(recipidx);
                if (recip_first == NULL)
                    recip_first = nopt;
                else
                    recip_opt->next = nopt;
                recip_opt = nopt;
            }
            if (o == OPT_RECIP_KDF) {
                if (recip_opt->kdf != NULL) {
                    BIO_puts(bio_err, "Illegal multiple -recip_kdf for one -recip\n");
                    goto end;
                }
                recip_opt->kdf = opt_arg();
            } else {
                if (recip_opt->ukm_data != NULL) {
                    BIO_puts(bio_err, "Illegal multiple -recip_ukm for one -recip\n");
                    goto end;
                }
                recip_opt->ukm_data = OPENSSL_hexstr2buf(opt_arg(),
                    &recip_opt->ukm_data_length);
                if (recip_opt->ukm_data == NULL) {
                    BIO_printf(bio_err, "Invalid hex value after -recip_ukm\n");
                    goto end;
                }
            }
            break;
        case OPT_CIPHER:
            ciphername = opt_unknown();
            break;
        case OPT_KEKCIPHER:
            kekciphername = opt_arg();
            break;
        case OPT_KEYOPT:
            keyidx = -1;
            if (operation == SMIME_ENCRYPT) {
                if (sk_X509_num(encerts) > 0)
                    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_puts(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");
                if ((nparam->param = sk_OPENSSL_STRING_new_null()) == NULL) {
                    OPENSSL_free(nparam);
                    goto end;
                }
                nparam->idx = keyidx;
                nparam->next = NULL;
                if (key_first == NULL)
                    key_first = nparam;
                else
                    key_param->next = nparam;
                key_param = nparam;
            }
            if (sk_OPENSSL_STRING_push(key_param->param, opt_arg()) <= 0)
                goto end;
            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_PROV_CASES:
            if (!opt_provider(o))
                goto end;
            break;
        case OPT_CONFIG:
            conf = app_load_config_modules(opt_arg());
            if (conf == NULL)
                goto end;
            break;
        case OPT_WRAP:
            wrapname = opt_arg();
            break;
        case OPT_AES128_WRAP:
        case OPT_AES192_WRAP:
        case OPT_AES256_WRAP:
        case OPT_3DES_WRAP:
            wrapname = opt_flag() + 1;
            break;
        }
    }
    if (!app_RAND_load())
        goto end;

    if (digestname != NULL) {
        if (!opt_md(digestname, &sign_md))
            goto end;
    }
    if (!opt_cipher_any(ciphername, &cipher))
        goto end;
    if (kekciphername != NULL && !opt_cipher_any(kekciphername, &kekcipher))
        goto end;
    if (wrapname != NULL) {
        if (!opt_cipher_any(wrapname, &wrap_cipher))
            goto end;
    }

    /* Remaining args are files to process. */
    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 ((flags & CMS_CADES) != 0) {
        if ((flags & CMS_NOATTR) != 0) {
            BIO_puts(bio_err, "Incompatible options: "
                              "CAdES requires signed attributes\n");
            goto opthelp;
        }
        if (operation == SMIME_VERIFY
            && (flags & (CMS_NO_SIGNER_CERT_VERIFY | CMS_NO_ATTR_VERIFY)) != 0) {
            BIO_puts(bio_err, "Incompatible options: CAdES validation requires"
                              " certs and signed attributes validations\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;
            if (sk_OPENSSL_STRING_push(sksigners, signerfile) <= 0)
                goto end;
            if (skkeys == NULL && (skkeys = sk_OPENSSL_STRING_new_null()) == NULL)
                goto end;
            if (keyfile == NULL)
                keyfile = signerfile;
            if (sk_OPENSSL_STRING_push(skkeys, keyfile) <= 0)
                goto end;
        }
        if (sksigners == NULL) {
            BIO_puts(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_puts(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 && sk_X509_num(encerts) <= 0) {
            BIO_puts(bio_err, "No recipient(s) certificate(s) specified\n");
            goto opthelp;
        }
    } else if (!operation) {
        BIO_puts(bio_err, "No operation option (-encrypt|-decrypt|-sign|-verify|...) specified.\n");
        goto opthelp;
    }

    if (!app_passwd(passinarg, NULL, &passin, NULL)) {
        BIO_puts(bio_err, "Error getting password\n");
        goto end;
    }

    ret = 2;

    if ((operation & SMIME_SIGNERS) == 0) {
        if ((flags & CMS_DETACHED) == 0)
            BIO_puts(bio_err,
                "Warning: -nodetach option is ignored for non-signing operation\n");

        flags &= ~CMS_DETACHED;
    }
    if ((operation & SMIME_IP) == 0 && contfile != NULL)
        BIO_puts(bio_err,
            "Warning: -contfile option is ignored for the given operation\n");
    if (operation != SMIME_ENCRYPT && *argv != NULL)
        BIO_puts(bio_err,
            "Warning: recipient certificate file parameters ignored for operation other than -encrypt\n");
    if (operation != SMIME_ENCRYPT && recip_first != NULL)
        BIO_puts(bio_err,
            "Warning: -recip_kdf and -recip_ukm parameters ignored for operation other than -encrypt\n");

    if ((flags & CMS_BINARY) != 0) {
        if (!(operation & SMIME_OP))
            outformat = FORMAT_BINARY;
        if (!(operation & SMIME_IP))
            informat = FORMAT_BINARY;
        if ((operation & SMIME_SIGNERS) != 0 && (flags & CMS_DETACHED) != 0)
            binary_files = 1;
        if ((operation & SMIME_IP) != 0 && contfile == NULL)
            binary_files = 1;
    }

    if (operation == SMIME_ENCRYPT) {
        if (!cipher)
            cipher = (EVP_CIPHER *)EVP_aes_256_cbc();
        if (secret_key && !secret_keyid) {
            BIO_puts(bio_err, "No secret key id\n");
            goto end;
        }

        for (; *argv != NULL; argv++) {
            cert = load_cert(*argv, FORMAT_UNDEF,
                "recipient certificate file");
            if (cert == NULL)
                goto end;
            if (!sk_X509_push(encerts, cert))
                goto end;
            cert = NULL;
        }
    }

    if (certfile != NULL
        && !load_certs(certfile, 0, &other, NULL, "certificate file"))
        goto end;

    if (recipfile != NULL && (operation == SMIME_DECRYPT)
        && (recip = load_cert(recipfile, FORMAT_UNDEF,
                "recipient certificate file"))
            == NULL)
        goto end;

    if (originatorfile != NULL
        && (originator = load_cert(originatorfile, FORMAT_UNDEF,
                "originator certificate file"))
            == NULL)
        goto end;

    if (operation == SMIME_SIGN_RECEIPT
        && (signer = load_cert(signerfile, FORMAT_UNDEF,
                "receipt signer certificate file"))
            == NULL)
        goto end;

    if ((operation == SMIME_DECRYPT) || (operation == SMIME_ENCRYPT)) {
        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, "signing key");
        if (key == NULL)
            goto end;
    }

    if (digesthex != NULL) {
        if (operation != SMIME_SIGN) {
            BIO_puts(bio_err,
                "Cannot use -digest for non-signing operation\n");
            goto end;
        }
        if (infile != NULL
            || (flags & CMS_DETACHED) == 0
            || (flags & CMS_STREAM) != 0) {
            BIO_puts(bio_err,
                "Cannot use -digest when -in, -nodetach or streaming is used\n");
            goto end;
        }
        digestbin = OPENSSL_hexstr2buf(digesthex, &digestlen);
        if (digestbin == NULL) {
            BIO_puts(bio_err,
                "Invalid hex value after -digest\n");
            goto end;
        }
    } else {
        in = bio_open_default(infile, 'r',
            binary_files ? FORMAT_BINARY : informat);
        if (in == NULL)
            goto end;
    }

    if (operation & SMIME_IP) {
        cms = load_content_info(informat, in, flags, &indata, "SMIME");
        if (cms == NULL)
            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;
            }
            OSSL_STACK_OF_X509_free(allcerts);
        }
    }

    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;
        }

        rcms = load_content_info(rctformat, rctin, 0, NULL, "receipt");
        if (rcms == NULL)
            goto end;
    }

    out = bio_open_default(outfile, 'w',
        binary_files ? FORMAT_BINARY : outformat);
    if (out == NULL)
        goto end;

    if ((operation == SMIME_VERIFY) || (operation == SMIME_VERIFY_RECEIPT)) {
        if ((store = setup_verify(CAfile, noCAfile, CApath, noCApath,
                 CAstore, noCAstore))
            == 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_ex(in, flags, libctx, app_get0_propq());
    } else if (operation == SMIME_DIGEST_CREATE) {
        cms = CMS_digest_create_ex(in, sign_md, flags, libctx, app_get0_propq());
    } else if (operation == SMIME_COMPRESS) {
        cms = CMS_compress(in, -1, flags);
    } else if (operation == SMIME_ENCRYPT) {
        int i;
        flags |= CMS_PARTIAL;
        cms = CMS_encrypt_ex(NULL, in, cipher, flags, libctx, app_get0_propq());
        if (cms == NULL)
            goto end;
        for (i = 0; i < sk_X509_num(encerts); i++) {
            CMS_RecipientInfo *ri;
            int ri_type;
            cms_key_param *kparam;
            cms_recip_opt *ropt;
            int tflags = flags | CMS_KEY_PARAM;
            /* This flag enforces allocating the EVP_PKEY_CTX for the recipient here */
            EVP_PKEY_CTX *pctx;
            X509 *x = sk_X509_value(encerts, i);
            int res;

            for (kparam = key_first; kparam; kparam = kparam->next) {
                if (kparam->idx == i)
                    break;
            }
            for (ropt = recip_first; ropt; ropt = ropt->next) {
                if (ropt->idx == i)
                    break;
            }
            ri = CMS_add1_recipient(cms, x, key, originator, tflags);
            if (ri == NULL)
                goto end;

            ri_type = CMS_RecipientInfo_type(ri);

            pctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
            if (pctx != NULL && kparam != NULL) {
                if (!cms_set_pkey_param(pctx, kparam->param))
                    goto end;
            }

            res = EVP_PKEY_CTX_ctrl(pctx, -1, -1,
                EVP_PKEY_CTRL_CIPHER,
                EVP_CIPHER_get_nid(cipher), NULL);
            if (res <= 0 && res != -2)
                goto end;

            if (wrap_cipher != NULL) {
                EVP_CIPHER_CTX *wctx = NULL;

                if (ri_type == CMS_RECIPINFO_AGREE)
                    wctx = CMS_RecipientInfo_kari_get0_ctx(ri);
                else if (ri_type == CMS_RECIPINFO_KEM)
                    wctx = CMS_RecipientInfo_kemri_get0_ctx(ri);
                if (wctx != NULL) {
                    if (EVP_EncryptInit_ex(wctx, wrap_cipher, NULL, NULL, NULL) != 1)
                        goto end;
                }
            }

            if (ropt != NULL && ri_type == CMS_RECIPINFO_KEM) {
                if (ropt->ukm_data != NULL) {
                    if (!CMS_RecipientInfo_kemri_set_ukm(ri, ropt->ukm_data,
                            (int)ropt->ukm_data_length))
                        goto end;
                }
                if (ropt->kdf != NULL) {
                    X509_ALGOR *kdf_algo;
                    ASN1_OBJECT *kdf_obj;

                    kdf_algo = CMS_RecipientInfo_kemri_get0_kdf_alg(ri);
                    kdf_obj = OBJ_txt2obj(ropt->kdf, 0);
                    if (kdf_obj == NULL) {
                        BIO_printf(bio_err, "Unknown KDF %s\n", ropt->kdf);
                        goto end;
                    }
                    /* Only works for OIDs without params */
                    if (!X509_ALGOR_set0(kdf_algo, kdf_obj, V_ASN1_UNDEF, NULL))
                        goto end;
                }
            }
        }

        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, kekcipher)
                == NULL)
                goto end;
            pwri_tmp = NULL;
        }
        if (!(flags & CMS_STREAM)) {
            if (!CMS_final(cms, in, NULL, flags)) {
                if (originator != NULL
                    && ERR_GET_REASON(ERR_peek_error())
                        == CMS_R_ERROR_UNSUPPORTED_STATIC_KEY_AGREEMENT) {
                    BIO_puts(bio_err, "Cannot use originator for encryption\n");
                    goto end;
                }
                goto end;
            }
        }
    } else if (operation == SMIME_ENCRYPTED_ENCRYPT) {
        cms = CMS_EncryptedData_encrypt_ex(in, cipher, secret_key,
            secret_keylen, flags, libctx, app_get0_propq());

    } 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)
            goto end;
        si = sk_CMS_SignerInfo_value(sis, 0);
        srcms = CMS_sign_receipt(si, signer, key, other, flags);
        if (srcms == NULL)
            goto end;
        CMS_ContentInfo_free(cms);
        cms = srcms;
    } else if (operation & SMIME_SIGNERS) {
        int i;
        /*
         * If detached data content and not signing pre-computed digest, we
         * enable streaming if S/MIME output format.
         */
        if (operation == SMIME_SIGN) {

            if ((flags & CMS_DETACHED) != 0 && digestbin == NULL) {
                if (outformat == FORMAT_SMIME)
                    flags |= CMS_STREAM;
            }
            flags |= CMS_PARTIAL;
            cms = CMS_sign_ex(NULL, NULL, other, in, flags, libctx, app_get0_propq());
            if (cms == NULL) {
                BIO_puts(bio_err, "CMS SignedData Creation Error\n");
                goto end;
            }
            if (econtent_type != NULL)
                CMS_set1_eContentType(cms, econtent_type);

            if (rr_to != NULL
                && ((rr = make_receipt_request(rr_to, rr_allorfirst, rr_from))
                    == NULL)) {
                BIO_puts(bio_err, "Signed Receipt Request Creation Error\n");
                goto end;
            }
        } else {
            flags |= CMS_REUSE_DIGEST;
        }
        for (i = 0; i < sk_OPENSSL_STRING_num(sksigners); i++) {
            CMS_SignerInfo *si;
            cms_key_param *kparam;
            int tflags = flags;
            signerfile = sk_OPENSSL_STRING_value(sksigners, i);
            keyfile = sk_OPENSSL_STRING_value(skkeys, i);

            signer = load_cert(signerfile, FORMAT_UNDEF, "signer certificate");
            if (signer == NULL) {
                ret = 2;
                goto end;
            }
            key = load_key(keyfile, keyform, 0, passin, "signing key");
            if (key == NULL) {
                ret = 2;
                goto end;
            }

            for (kparam = key_first; kparam; kparam = kparam->next) {
                if (kparam->idx == i) {
                    tflags |= CMS_KEY_PARAM;
                    break;
                }
            }
            si = CMS_add1_signer(cms, signer, key, sign_md, tflags);
            if (si == NULL) {
                BIO_printf(bio_err, "Error adding SignerInfo with key from %s\n", keyfile);
                goto end;
            }

            if (kparam != NULL) {
                EVP_PKEY_CTX *pctx = CMS_SignerInfo_get0_pkey_ctx(si);

                if (!cms_set_pkey_param(pctx, kparam->param))
                    goto end;
            }
            if (rr != NULL && !CMS_add1_ReceiptRequest(si, rr)) {
                BIO_puts(bio_err, "Error adding CMS ReceiptRequest\n");
                goto end;
            }
            X509_free(signer);
            signer = NULL;
            EVP_PKEY_free(key);
            key = NULL;
        }
        /* If not streaming or resigning finalize structure */
        if (operation == SMIME_SIGN && (flags & CMS_STREAM) == 0) {
            int res;

            if (digestbin != NULL) /* Use pre-computed digest instead of content */
                res = CMS_final_digest(cms, digestbin, digestlen, NULL, flags);
            else
                res = CMS_final(cms, in, NULL, flags);
            if (!res) {
                BIO_puts(bio_err, "Error finalizing CMS structure\n");
                goto end;
            }
        }
    }

    if (cms == NULL) {
        BIO_puts(bio_err, "Error creating CMS structure\n");
        goto end;
    }

    ret = 4;
    if (operation == SMIME_DECRYPT) {
        if (flags & CMS_DEBUG_DECRYPT)
            CMS_decrypt(cms, NULL, NULL, NULL, NULL, flags);

        if (secret_key != NULL) {
            if (!CMS_decrypt_set1_key(cms,
                    secret_key, secret_keylen,
                    secret_keyid, secret_keyidlen)) {
                BIO_puts(bio_err, "Error decrypting CMS using secret key\n");
                goto end;
            }
        }

        if (key != NULL) {
            if (!CMS_decrypt_set1_pkey_and_peer(cms, key, recip, originator)) {
                BIO_puts(bio_err, "Error decrypting CMS using private key\n");
                goto end;
            }
        }

        if (pwri_pass != NULL) {
            if (!CMS_decrypt_set1_password(cms, pwri_pass, -1)) {
                BIO_puts(bio_err, "Error decrypting CMS using password\n");
                goto end;
            }
        }

        if (!CMS_decrypt(cms, NULL, NULL, indata, out, flags)) {
            BIO_puts(bio_err, "Error decrypting CMS structure\n");
            goto end;
        }
    } else if (operation == SMIME_DATA_OUT) {
        if (!CMS_data(cms, out, flags))
            goto end;
    } else if (operation == SMIME_UNCOMPRESS) {
        if (!CMS_uncompress(cms, indata, out, flags))
            goto end;
    } else if (operation == SMIME_DIGEST_VERIFY) {
        if (CMS_digest_verify(cms, indata, out, flags) > 0) {
            BIO_puts(bio_err, "Verification successful\n");
        } else {
            BIO_puts(bio_err, "Verification failure\n");
            goto end;
        }
    } else if (operation == SMIME_ENCRYPTED_DECRYPT) {
        if (!CMS_EncryptedData_decrypt(cms, secret_key, secret_keylen,
                indata, out, flags))
            goto end;
    } else if (operation == SMIME_VERIFY) {
        if (CMS_verify(cms, other, store, indata, out, flags) > 0) {
            BIO_printf(bio_err, "%s Verification successful\n",
                (flags & CMS_CADES) != 0 ? "CAdES" : "CMS");
        } else {
            BIO_printf(bio_err, "%s Verification failure\n",
                (flags & CMS_CADES) != 0 ? "CAdES" : "CMS");
            if (verify_retcode)
                ret = verify_err + 32;
            goto end;
        }
        if (signerfile != NULL) {
            STACK_OF(X509) *signers = CMS_get0_signers(cms);

            if (!save_certs(signerfile, signers)) {
                BIO_printf(bio_err,
                    "Error writing signers to %s\n", signerfile);
                ret = 5;
                goto end;
            }
            sk_X509_free(signers);
        }
        if (rr_print)
            receipt_request_print(cms);

    } else if (operation == SMIME_VERIFY_RECEIPT) {
        if (CMS_verify_receipt(rcms, cms, other, store, flags) > 0) {
            BIO_puts(bio_err, "Verification successful\n");
        } else {
            BIO_puts(bio_err, "Verification failure\n");
            goto end;
        }
    } else {
        /* within this block, ret > 0 means 'ok' */
        if (noout) {
            if (print) {
                ASN1_PCTX *pctx = NULL;
                if (get_nameopt() != XN_FLAG_ONELINE) {
                    pctx = ASN1_PCTX_new();
                    if (pctx != NULL) { /* Print anyway if malloc failed */
                        ASN1_PCTX_set_flags(pctx, ASN1_PCTX_FLAGS_SHOW_ABSENT);
                        ASN1_PCTX_set_str_flags(pctx, get_nameopt());
                        ASN1_PCTX_set_nm_flags(pctx, get_nameopt());
                    }
                }
                CMS_ContentInfo_print_ctx(out, cms, 0, pctx);
                ASN1_PCTX_free(pctx);
            }
            ret = 1;
        } else if (outformat == FORMAT_SMIME) {
            if (to != NULL && BIO_printf(out, "To: %s%s", to, mime_eol) < 0)
                goto end;
            if (from != NULL && BIO_printf(out, "From: %s%s", from, mime_eol) < 0)
                goto end;
            if (subject != NULL && BIO_printf(out, "Subject: %s%s", subject, mime_eol) < 0)
                goto end;
            if (operation == SMIME_RESIGN)
                ret = SMIME_write_CMS(out, cms, indata, flags);
            else
                ret = SMIME_write_CMS(out, cms, in, flags);
        } else if (outformat == FORMAT_PEM) {
            ret = PEM_write_bio_CMS_stream(out, cms, in, flags);
        } else if (outformat == FORMAT_ASN1) {
            ret = i2d_CMS_bio_stream(out, cms, in, flags);
        } else {
            BIO_puts(bio_err, "Bad output format for CMS file\n");
            goto end;
        }
        if (ret <= 0) {
            BIO_puts(bio_err, "Error writing CMS output\n");
            ret = 6;
            goto end;
        }
    }
    ret = 0;
end:
    if (ret != 0)
        ERR_print_errors(bio_err);
    OSSL_STACK_OF_X509_free(encerts);
    OSSL_STACK_OF_X509_free(other);
    X509_VERIFY_PARAM_free(vpm);
    sk_OPENSSL_STRING_free(sksigners);
    sk_OPENSSL_STRING_free(skkeys);
    OPENSSL_free(secret_key);
    OPENSSL_free(secret_keyid);
    OPENSSL_free(pwri_tmp);
    ASN1_OBJECT_free(econtent_type);
    CMS_ReceiptRequest_free(rr);
    sk_OPENSSL_STRING_free(rr_to);
    sk_OPENSSL_STRING_free(rr_from);
    for (key_param = key_first; key_param;) {
        cms_key_param *tparam;
        sk_OPENSSL_STRING_free(key_param->param);
        tparam = key_param->next;
        OPENSSL_free(key_param);
        key_param = tparam;
    }
    for (recip_opt = recip_first; recip_opt != NULL;) {
        cms_recip_opt *topt;

        OPENSSL_free(recip_opt->ukm_data);
        topt = recip_opt->next;
        OPENSSL_free(recip_opt);
        recip_opt = topt;
    }
    X509_STORE_free(store);
    X509_free(cert);
    X509_free(recip);
    X509_free(signer);
    X509_free(originator);
    EVP_PKEY_free(key);
    EVP_CIPHER_free(cipher);
    EVP_CIPHER_free(kekcipher);
    EVP_CIPHER_free(wrap_cipher);
    EVP_MD_free(sign_md);
    CMS_ContentInfo_free(cms);
    CMS_ContentInfo_free(rcms);
    BIO_free(rctin);
    BIO_free(in);
    BIO_free(indata);
    BIO_free_all(out);
    OPENSSL_free(digestbin);
    OPENSSL_free(passin);
    NCONF_free(conf);
    return ret;
}

static int save_certs(char *signerfile, STACK_OF(X509) *signers)
{
    int i;
    BIO *tmp;
    if (signerfile == NULL)
        return 1;
    tmp = BIO_new_file(signerfile, "w");
    if (tmp == NULL)
        return 0;
    for (i = 0; i < sk_X509_num(signers); i++)
        PEM_write_bio_X509(tmp, sk_X509_value(signers, i));
    BIO_free(tmp);
    return 1;
}

/* Minimal callback just to output policy info (if any) */

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

    error = X509_STORE_CTX_get_error(ctx);

    verify_err = error;

    if ((error != X509_V_ERR_NO_EXPLICIT_POLICY)
        && ((error != X509_V_OK) || (ok != 2)))
        return ok;

    policies_print(ctx);

    return ok;
}

static void gnames_stack_print(STACK_OF(GENERAL_NAMES) *gns)
{
    STACK_OF(GENERAL_NAME) *gens;
    GENERAL_NAME *gen;
    int i, j;

    for (i = 0; i < sk_GENERAL_NAMES_num(gns); i++) {
        gens = sk_GENERAL_NAMES_value(gns, i);
        for (j = 0; j < sk_GENERAL_NAME_num(gens); j++) {
            gen = sk_GENERAL_NAME_value(gens, j);
            BIO_puts(bio_err, "    ");
            GENERAL_NAME_print(bio_err, gen);
            BIO_puts(bio_err, "\n");
        }
    }
    return;
}

static void receipt_request_print(CMS_ContentInfo *cms)
{
    STACK_OF(CMS_SignerInfo) *sis;
    CMS_SignerInfo *si;
    CMS_ReceiptRequest *rr;
    int allorfirst;
    STACK_OF(GENERAL_NAMES) *rto, *rlist;
    ASN1_STRING *scid;
    int i, rv;
    sis = CMS_get0_SignerInfos(cms);
    for (i = 0; i < sk_CMS_SignerInfo_num(sis); i++) {
        si = sk_CMS_SignerInfo_value(sis, i);
        rv = CMS_get1_ReceiptRequest(si, &rr);
        BIO_printf(bio_err, "Signer %d:\n", i + 1);
        if (rv == 0) {
            BIO_puts(bio_err, "  No Receipt Request\n");
        } else if (rv < 0) {
            BIO_puts(bio_err, "  Receipt Request Parse Error\n");
            ERR_print_errors(bio_err);
        } else {
            const char *id;
            int idlen;
            CMS_ReceiptRequest_get0_values(rr, &scid, &allorfirst,
                &rlist, &rto);
            BIO_puts(bio_err, "  Signed Content ID:\n");
            idlen = ASN1_STRING_length(scid);
            id = (const char *)ASN1_STRING_get0_data(scid);
            BIO_dump_indent(bio_err, id, idlen, 4);
            BIO_puts(bio_err, "  Receipts From");
            if (rlist != NULL) {
                BIO_puts(bio_err, " List:\n");
                gnames_stack_print(rlist);
            } else if (allorfirst == 1) {
                BIO_puts(bio_err, ": First Tier\n");
            } else if (allorfirst == 0) {
                BIO_puts(bio_err, ": All\n");
            } else {
                BIO_printf(bio_err, " Unknown (%d)\n", allorfirst);
            }
            BIO_puts(bio_err, "  Receipts To:\n");
            gnames_stack_print(rto);
        }
        CMS_ReceiptRequest_free(rr);
    }
}

static STACK_OF(GENERAL_NAMES) *make_names_stack(STACK_OF(OPENSSL_STRING) *ns)
{
    int i;
    STACK_OF(GENERAL_NAMES) *ret;
    GENERAL_NAMES *gens = NULL;
    GENERAL_NAME *gen = NULL;
    ret = sk_GENERAL_NAMES_new_null();
    if (ret == NULL)
        goto err;
    for (i = 0; i < sk_OPENSSL_STRING_num(ns); i++) {
        char *str = sk_OPENSSL_STRING_value(ns, i);
        gen = a2i_GENERAL_NAME(NULL, NULL, NULL, GEN_EMAIL, str, 0);
        if (gen == NULL)
            goto err;
        gens = GENERAL_NAMES_new();
        if (gens == NULL)
            goto err;
        if (!sk_GENERAL_NAME_push(gens, gen))
            goto err;
        gen = NULL;
        if (!sk_GENERAL_NAMES_push(ret, gens))
            goto err;
        gens = NULL;
    }

    return ret;

err:
    sk_GENERAL_NAMES_pop_free(ret, GENERAL_NAMES_free);
    GENERAL_NAMES_free(gens);
    GENERAL_NAME_free(gen);
    return NULL;
}

static CMS_ReceiptRequest *make_receipt_request(STACK_OF(OPENSSL_STRING) *rr_to, int rr_allorfirst,
    STACK_OF(OPENSSL_STRING) *rr_from)
{
    STACK_OF(GENERAL_NAMES) *rct_to = NULL, *rct_from = NULL;
    CMS_ReceiptRequest *rr;

    rct_to = make_names_stack(rr_to);
    if (rct_to == NULL)
        goto err;
    if (rr_from != NULL) {
        rct_from = make_names_stack(rr_from);
        if (rct_from == NULL)
            goto err;
    } else {
        rct_from = NULL;
    }
    rr = CMS_ReceiptRequest_create0_ex(NULL, -1, rr_allorfirst, rct_from,
        rct_to, app_get0_libctx());
    if (rr == NULL)
        goto err;
    return rr;
err:
    sk_GENERAL_NAMES_pop_free(rct_to, GENERAL_NAMES_free);
    sk_GENERAL_NAMES_pop_free(rct_from, GENERAL_NAMES_free);
    return NULL;
}

static int cms_set_pkey_param(EVP_PKEY_CTX *pctx,
    STACK_OF(OPENSSL_STRING) *param)
{
    char *keyopt;
    int i;
    if (sk_OPENSSL_STRING_num(param) <= 0)
        return 1;
    for (i = 0; i < sk_OPENSSL_STRING_num(param); i++) {
        keyopt = sk_OPENSSL_STRING_value(param, i);
        if (pkey_ctrl_string(pctx, keyopt) <= 0) {
            BIO_printf(bio_err, "Error setting CMS key parameter \"%s\"\n", keyopt);
            return 0;
        }
    }
    return 1;
}