コード例 #1
0
ファイル: cms.c プロジェクト: davidlt/openssl-fedora
int MAIN(int argc, char **argv)
{
    ENGINE *e = NULL;
    int operation = 0;
    int ret = 0;
    char **args;
    const char *inmode = "r", *outmode = "w";
    char *infile = NULL, *outfile = NULL, *rctfile = NULL;
    char *signerfile = NULL, *recipfile = NULL;
    STACK_OF(OPENSSL_STRING) *sksigners = NULL, *skkeys = NULL;
    char *certfile = NULL, *keyfile = NULL, *contfile = NULL;
    char *certsoutfile = NULL;
    const EVP_CIPHER *cipher = NULL, *wrap_cipher = NULL;
    CMS_ContentInfo *cms = NULL, *rcms = NULL;
    X509_STORE *store = NULL;
    X509 *cert = NULL, *recip = NULL, *signer = NULL;
    EVP_PKEY *key = NULL;
    STACK_OF(X509) *encerts = NULL, *other = NULL;
    BIO *in = NULL, *out = NULL, *indata = NULL, *rctin = NULL;
    int badarg = 0;
    int flags = CMS_DETACHED, noout = 0, print = 0;
    int verify_retcode = 0;
    int rr_print = 0, rr_allorfirst = -1;
    STACK_OF(OPENSSL_STRING) *rr_to = NULL, *rr_from = NULL;
    CMS_ReceiptRequest *rr = NULL;
    char *to = NULL, *from = NULL, *subject = NULL;
    char *CAfile = NULL, *CApath = NULL;
    char *passargin = NULL, *passin = NULL;
    char *inrand = NULL;
    int need_rand = 0;
    const EVP_MD *sign_md = NULL;
    int informat = FORMAT_SMIME, outformat = FORMAT_SMIME;
    int rctformat = FORMAT_SMIME, keyform = FORMAT_PEM;
# ifndef OPENSSL_NO_ENGINE
    char *engine = NULL;
# endif
    unsigned char *secret_key = NULL, *secret_keyid = NULL;
    unsigned char *pwri_pass = NULL, *pwri_tmp = NULL;
    size_t secret_keylen = 0, secret_keyidlen = 0;

    cms_key_param *key_first = NULL, *key_param = NULL;

    ASN1_OBJECT *econtent_type = NULL;

    X509_VERIFY_PARAM *vpm = NULL;

    args = argv + 1;
    ret = 1;

    apps_startup();

    if (bio_err == NULL) {
        if ((bio_err = BIO_new(BIO_s_file())) != NULL)
            BIO_set_fp(bio_err, stderr, BIO_NOCLOSE | BIO_FP_TEXT);
    }

    if (!load_config(bio_err, NULL))
        goto end;

    while (!badarg && *args && *args[0] == '-') {
        if (!strcmp(*args, "-encrypt"))
            operation = SMIME_ENCRYPT;
        else if (!strcmp(*args, "-decrypt"))
            operation = SMIME_DECRYPT;
        else if (!strcmp(*args, "-sign"))
            operation = SMIME_SIGN;
        else if (!strcmp(*args, "-sign_receipt"))
            operation = SMIME_SIGN_RECEIPT;
        else if (!strcmp(*args, "-resign"))
            operation = SMIME_RESIGN;
        else if (!strcmp(*args, "-verify"))
            operation = SMIME_VERIFY;
        else if (!strcmp(*args, "-verify_retcode"))
            verify_retcode = 1;
        else if (!strcmp(*args, "-verify_receipt")) {
            operation = SMIME_VERIFY_RECEIPT;
            if (!args[1])
                goto argerr;
            args++;
            rctfile = *args;
        } else if (!strcmp(*args, "-cmsout"))
            operation = SMIME_CMSOUT;
        else if (!strcmp(*args, "-data_out"))
            operation = SMIME_DATAOUT;
        else if (!strcmp(*args, "-data_create"))
            operation = SMIME_DATA_CREATE;
        else if (!strcmp(*args, "-digest_verify"))
            operation = SMIME_DIGEST_VERIFY;
        else if (!strcmp(*args, "-digest_create"))
            operation = SMIME_DIGEST_CREATE;
        else if (!strcmp(*args, "-compress"))
            operation = SMIME_COMPRESS;
        else if (!strcmp(*args, "-uncompress"))
            operation = SMIME_UNCOMPRESS;
        else if (!strcmp(*args, "-EncryptedData_decrypt"))
            operation = SMIME_ENCRYPTED_DECRYPT;
        else if (!strcmp(*args, "-EncryptedData_encrypt"))
            operation = SMIME_ENCRYPTED_ENCRYPT;
# ifndef OPENSSL_NO_DES
        else if (!strcmp(*args, "-des3"))
            cipher = EVP_des_ede3_cbc();
        else if (!strcmp(*args, "-des"))
            cipher = EVP_des_cbc();
        else if (!strcmp(*args, "-des3-wrap"))
            wrap_cipher = EVP_des_ede3_wrap();
# endif
# ifndef OPENSSL_NO_SEED
        else if (!strcmp(*args, "-seed"))
            cipher = EVP_seed_cbc();
# endif
# ifndef OPENSSL_NO_RC2
        else if (!strcmp(*args, "-rc2-40"))
            cipher = EVP_rc2_40_cbc();
        else if (!strcmp(*args, "-rc2-128"))
            cipher = EVP_rc2_cbc();
        else if (!strcmp(*args, "-rc2-64"))
            cipher = EVP_rc2_64_cbc();
# endif
# ifndef OPENSSL_NO_AES
        else if (!strcmp(*args, "-aes128"))
            cipher = EVP_aes_128_cbc();
        else if (!strcmp(*args, "-aes192"))
            cipher = EVP_aes_192_cbc();
        else if (!strcmp(*args, "-aes256"))
            cipher = EVP_aes_256_cbc();
        else if (!strcmp(*args, "-aes128-wrap"))
            wrap_cipher = EVP_aes_128_wrap();
        else if (!strcmp(*args, "-aes192-wrap"))
            wrap_cipher = EVP_aes_192_wrap();
        else if (!strcmp(*args, "-aes256-wrap"))
            wrap_cipher = EVP_aes_256_wrap();
# endif
# ifndef OPENSSL_NO_CAMELLIA
        else if (!strcmp(*args, "-camellia128"))
            cipher = EVP_camellia_128_cbc();
        else if (!strcmp(*args, "-camellia192"))
            cipher = EVP_camellia_192_cbc();
        else if (!strcmp(*args, "-camellia256"))
            cipher = EVP_camellia_256_cbc();
# endif
        else if (!strcmp(*args, "-debug_decrypt"))
            flags |= CMS_DEBUG_DECRYPT;
        else if (!strcmp(*args, "-text"))
            flags |= CMS_TEXT;
        else if (!strcmp(*args, "-nointern"))
            flags |= CMS_NOINTERN;
        else if (!strcmp(*args, "-noverify")
                 || !strcmp(*args, "-no_signer_cert_verify"))
            flags |= CMS_NO_SIGNER_CERT_VERIFY;
        else if (!strcmp(*args, "-nocerts"))
            flags |= CMS_NOCERTS;
        else if (!strcmp(*args, "-noattr"))
            flags |= CMS_NOATTR;
        else if (!strcmp(*args, "-nodetach"))
            flags &= ~CMS_DETACHED;
        else if (!strcmp(*args, "-nosmimecap"))
            flags |= CMS_NOSMIMECAP;
        else if (!strcmp(*args, "-binary"))
            flags |= CMS_BINARY;
        else if (!strcmp(*args, "-keyid"))
            flags |= CMS_USE_KEYID;
        else if (!strcmp(*args, "-nosigs"))
            flags |= CMS_NOSIGS;
        else if (!strcmp(*args, "-no_content_verify"))
            flags |= CMS_NO_CONTENT_VERIFY;
        else if (!strcmp(*args, "-no_attr_verify"))
            flags |= CMS_NO_ATTR_VERIFY;
        else if (!strcmp(*args, "-stream"))
            flags |= CMS_STREAM;
        else if (!strcmp(*args, "-indef"))
            flags |= CMS_STREAM;
        else if (!strcmp(*args, "-noindef"))
            flags &= ~CMS_STREAM;
        else if (!strcmp(*args, "-nooldmime"))
            flags |= CMS_NOOLDMIMETYPE;
        else if (!strcmp(*args, "-crlfeol"))
            flags |= CMS_CRLFEOL;
        else if (!strcmp(*args, "-noout"))
            noout = 1;
        else if (!strcmp(*args, "-receipt_request_print"))
            rr_print = 1;
        else if (!strcmp(*args, "-receipt_request_all"))
            rr_allorfirst = 0;
        else if (!strcmp(*args, "-receipt_request_first"))
            rr_allorfirst = 1;
        else if (!strcmp(*args, "-receipt_request_from")) {
            if (!args[1])
                goto argerr;
            args++;
            if (!rr_from)
                rr_from = sk_OPENSSL_STRING_new_null();
            sk_OPENSSL_STRING_push(rr_from, *args);
        } else if (!strcmp(*args, "-receipt_request_to")) {
            if (!args[1])
                goto argerr;
            args++;
            if (!rr_to)
                rr_to = sk_OPENSSL_STRING_new_null();
            sk_OPENSSL_STRING_push(rr_to, *args);
        } else if (!strcmp(*args, "-print")) {
            noout = 1;
            print = 1;
        } else if (!strcmp(*args, "-secretkey")) {
            long ltmp;
            if (!args[1])
                goto argerr;
            args++;
            secret_key = string_to_hex(*args, &ltmp);
            if (!secret_key) {
                BIO_printf(bio_err, "Invalid key %s\n", *args);
                goto argerr;
            }
            secret_keylen = (size_t)ltmp;
        } else if (!strcmp(*args, "-secretkeyid")) {
            long ltmp;
            if (!args[1])
                goto argerr;
            args++;
            secret_keyid = string_to_hex(*args, &ltmp);
            if (!secret_keyid) {
                BIO_printf(bio_err, "Invalid id %s\n", *args);
                goto argerr;
            }
            secret_keyidlen = (size_t)ltmp;
        } else if (!strcmp(*args, "-pwri_password")) {
            if (!args[1])
                goto argerr;
            args++;
            pwri_pass = (unsigned char *)*args;
        } else if (!strcmp(*args, "-econtent_type")) {
            if (!args[1])
                goto argerr;
            args++;
            econtent_type = OBJ_txt2obj(*args, 0);
            if (!econtent_type) {
                BIO_printf(bio_err, "Invalid OID %s\n", *args);
                goto argerr;
            }
        } else if (!strcmp(*args, "-rand")) {
            if (!args[1])
                goto argerr;
            args++;
            inrand = *args;
            need_rand = 1;
        }
# ifndef OPENSSL_NO_ENGINE
        else if (!strcmp(*args, "-engine")) {
            if (!args[1])
                goto argerr;
            engine = *++args;
        }
# endif
        else if (!strcmp(*args, "-passin")) {
            if (!args[1])
                goto argerr;
            passargin = *++args;
        } else if (!strcmp(*args, "-to")) {
            if (!args[1])
                goto argerr;
            to = *++args;
        } else if (!strcmp(*args, "-from")) {
            if (!args[1])
                goto argerr;
            from = *++args;
        } else if (!strcmp(*args, "-subject")) {
            if (!args[1])
                goto argerr;
            subject = *++args;
        } else if (!strcmp(*args, "-signer")) {
            if (!args[1])
                goto argerr;
            /* If previous -signer argument add signer to list */

            if (signerfile) {
                if (!sksigners)
                    sksigners = sk_OPENSSL_STRING_new_null();
                sk_OPENSSL_STRING_push(sksigners, signerfile);
                if (!keyfile)
                    keyfile = signerfile;
                if (!skkeys)
                    skkeys = sk_OPENSSL_STRING_new_null();
                sk_OPENSSL_STRING_push(skkeys, keyfile);
                keyfile = NULL;
            }
            signerfile = *++args;
        } else if (!strcmp(*args, "-recip")) {
            if (!args[1])
                goto argerr;
            if (operation == SMIME_ENCRYPT) {
                if (!encerts)
                    encerts = sk_X509_new_null();
                cert = load_cert(bio_err, *++args, FORMAT_PEM,
                                 NULL, e, "recipient certificate file");
                if (!cert)
                    goto end;
                sk_X509_push(encerts, cert);
                cert = NULL;
            } else
                recipfile = *++args;
        } else if (!strcmp(*args, "-certsout")) {
            if (!args[1])
                goto argerr;
            certsoutfile = *++args;
        } else if (!strcmp(*args, "-md")) {
            if (!args[1])
                goto argerr;
            sign_md = EVP_get_digestbyname(*++args);
            if (sign_md == NULL) {
                BIO_printf(bio_err, "Unknown digest %s\n", *args);
                goto argerr;
            }
        } else if (!strcmp(*args, "-inkey")) {
            if (!args[1])
                goto argerr;
            /* If previous -inkey arument add signer to list */
            if (keyfile) {
                if (!signerfile) {
                    BIO_puts(bio_err, "Illegal -inkey without -signer\n");
                    goto argerr;
                }
                if (!sksigners)
                    sksigners = sk_OPENSSL_STRING_new_null();
                sk_OPENSSL_STRING_push(sksigners, signerfile);
                signerfile = NULL;
                if (!skkeys)
                    skkeys = sk_OPENSSL_STRING_new_null();
                sk_OPENSSL_STRING_push(skkeys, keyfile);
            }
            keyfile = *++args;
        } else if (!strcmp(*args, "-keyform")) {
            if (!args[1])
                goto argerr;
            keyform = str2fmt(*++args);
        } else if (!strcmp(*args, "-keyopt")) {
            int keyidx = -1;
            if (!args[1])
                goto argerr;
            if (operation == SMIME_ENCRYPT) {
                if (encerts)
                    keyidx += sk_X509_num(encerts);
            } else {
                if (keyfile || signerfile)
                    keyidx++;
                if (skkeys)
                    keyidx += sk_OPENSSL_STRING_num(skkeys);
            }
            if (keyidx < 0) {
                BIO_printf(bio_err, "No key specified\n");
                goto argerr;
            }
            if (key_param == NULL || key_param->idx != keyidx) {
                cms_key_param *nparam;
                nparam = OPENSSL_malloc(sizeof(cms_key_param));
                if (!nparam) {
                    BIO_printf(bio_err, "Out of memory\n");
                    goto argerr;
                }
                nparam->idx = keyidx;
                nparam->param = sk_OPENSSL_STRING_new_null();
                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, *++args);
        } else if (!strcmp(*args, "-rctform")) {
            if (!args[1])
                goto argerr;
            rctformat = str2fmt(*++args);
        } else if (!strcmp(*args, "-certfile")) {
            if (!args[1])
                goto argerr;
            certfile = *++args;
        } else if (!strcmp(*args, "-CAfile")) {
            if (!args[1])
                goto argerr;
            CAfile = *++args;
        } else if (!strcmp(*args, "-CApath")) {
            if (!args[1])
                goto argerr;
            CApath = *++args;
        } else if (!strcmp(*args, "-in")) {
            if (!args[1])
                goto argerr;
            infile = *++args;
        } else if (!strcmp(*args, "-inform")) {
            if (!args[1])
                goto argerr;
            informat = str2fmt(*++args);
        } else if (!strcmp(*args, "-outform")) {
            if (!args[1])
                goto argerr;
            outformat = str2fmt(*++args);
        } else if (!strcmp(*args, "-out")) {
            if (!args[1])
                goto argerr;
            outfile = *++args;
        } else if (!strcmp(*args, "-content")) {
            if (!args[1])
                goto argerr;
            contfile = *++args;
        } else if (args_verify(&args, NULL, &badarg, bio_err, &vpm))
            continue;
        else if ((cipher = EVP_get_cipherbyname(*args + 1)) == NULL)
            badarg = 1;
        args++;
    }

    if (((rr_allorfirst != -1) || rr_from) && !rr_to) {
        BIO_puts(bio_err, "No Signed Receipts Recipients\n");
        goto argerr;
    }

    if (!(operation & SMIME_SIGNERS) && (rr_to || rr_from)) {
        BIO_puts(bio_err, "Signed receipts only allowed with -sign\n");
        goto argerr;
    }
    if (!(operation & SMIME_SIGNERS) && (skkeys || sksigners)) {
        BIO_puts(bio_err, "Multiple signers or keys not allowed\n");
        goto argerr;
    }

    if (operation & SMIME_SIGNERS) {
        if (keyfile && !signerfile) {
            BIO_puts(bio_err, "Illegal -inkey without -signer\n");
            goto argerr;
        }
        /* Check to see if any final signer needs to be appended */
        if (signerfile) {
            if (!sksigners)
                sksigners = sk_OPENSSL_STRING_new_null();
            sk_OPENSSL_STRING_push(sksigners, signerfile);
            if (!skkeys)
                skkeys = sk_OPENSSL_STRING_new_null();
            if (!keyfile)
                keyfile = signerfile;
            sk_OPENSSL_STRING_push(skkeys, keyfile);
        }
        if (!sksigners) {
            BIO_printf(bio_err, "No signer certificate specified\n");
            badarg = 1;
        }
        signerfile = NULL;
        keyfile = NULL;
        need_rand = 1;
    }

    else if (operation == SMIME_DECRYPT) {
        if (!recipfile && !keyfile && !secret_key && !pwri_pass) {
            BIO_printf(bio_err,
                       "No recipient certificate or key specified\n");
            badarg = 1;
        }
    } else if (operation == SMIME_ENCRYPT) {
        if (!*args && !secret_key && !pwri_pass && !encerts) {
            BIO_printf(bio_err, "No recipient(s) certificate(s) specified\n");
            badarg = 1;
        }
        need_rand = 1;
    } else if (!operation)
        badarg = 1;

    if (badarg) {
 argerr:
        BIO_printf(bio_err, "Usage cms [options] cert.pem ...\n");
        BIO_printf(bio_err, "where options are\n");
        BIO_printf(bio_err, "-encrypt       encrypt message\n");
        BIO_printf(bio_err, "-decrypt       decrypt encrypted message\n");
        BIO_printf(bio_err, "-sign          sign message\n");
        BIO_printf(bio_err, "-verify        verify signed message\n");
        BIO_printf(bio_err, "-cmsout        output CMS structure\n");
# ifndef OPENSSL_NO_DES
        BIO_printf(bio_err, "-des3          encrypt with triple DES\n");
        BIO_printf(bio_err, "-des           encrypt with DES\n");
# endif
# ifndef OPENSSL_NO_SEED
        BIO_printf(bio_err, "-seed          encrypt with SEED\n");
# endif
# ifndef OPENSSL_NO_RC2
        BIO_printf(bio_err, "-rc2-40        encrypt with RC2-40 (default)\n");
        BIO_printf(bio_err, "-rc2-64        encrypt with RC2-64\n");
        BIO_printf(bio_err, "-rc2-128       encrypt with RC2-128\n");
# endif
# ifndef OPENSSL_NO_AES
        BIO_printf(bio_err, "-aes128, -aes192, -aes256\n");
        BIO_printf(bio_err,
                   "               encrypt PEM output with cbc aes\n");
# endif
# ifndef OPENSSL_NO_CAMELLIA
        BIO_printf(bio_err, "-camellia128, -camellia192, -camellia256\n");
        BIO_printf(bio_err,
                   "               encrypt PEM output with cbc camellia\n");
# endif
        BIO_printf(bio_err,
                   "-nointern      don't search certificates in message for signer\n");
        BIO_printf(bio_err,
                   "-nosigs        don't verify message signature\n");
        BIO_printf(bio_err,
                   "-noverify      don't verify signers certificate\n");
        BIO_printf(bio_err,
                   "-nocerts       don't include signers certificate when signing\n");
        BIO_printf(bio_err, "-nodetach      use opaque signing\n");
        BIO_printf(bio_err,
                   "-noattr        don't include any signed attributes\n");
        BIO_printf(bio_err,
                   "-binary        don't translate message to text\n");
        BIO_printf(bio_err, "-certfile file other certificates file\n");
        BIO_printf(bio_err, "-certsout file certificate output file\n");
        BIO_printf(bio_err, "-signer file   signer certificate file\n");
        BIO_printf(bio_err,
                   "-recip  file   recipient certificate file for decryption\n");
        BIO_printf(bio_err, "-keyid         use subject key identifier\n");
        BIO_printf(bio_err, "-in file       input file\n");
        BIO_printf(bio_err,
                   "-inform arg    input format SMIME (default), PEM or DER\n");
        BIO_printf(bio_err,
                   "-inkey file    input private key (if not signer or recipient)\n");
        BIO_printf(bio_err,
                   "-keyform arg   input private key format (PEM or ENGINE)\n");
        BIO_printf(bio_err, "-keyopt nm:v   set public key parameters\n");
        BIO_printf(bio_err, "-out file      output file\n");
        BIO_printf(bio_err,
                   "-outform arg   output format SMIME (default), PEM or DER\n");
        BIO_printf(bio_err,
                   "-content file  supply or override content for detached signature\n");
        BIO_printf(bio_err, "-to addr       to address\n");
        BIO_printf(bio_err, "-from ad       from address\n");
        BIO_printf(bio_err, "-subject s     subject\n");
        BIO_printf(bio_err,
                   "-text          include or delete text MIME headers\n");
        BIO_printf(bio_err,
                   "-CApath dir    trusted certificates directory\n");
        BIO_printf(bio_err, "-CAfile file   trusted certificates file\n");
        BIO_printf(bio_err,
                   "-trusted_first use trusted certificates first when building the trust chain\n");
        BIO_printf(bio_err,
                   "-no_alt_chains only ever use the first certificate chain found\n");
        BIO_printf(bio_err,
                   "-crl_check     check revocation status of signer's certificate using CRLs\n");
        BIO_printf(bio_err,
                   "-crl_check_all check revocation status of signer's certificate chain using CRLs\n");
# ifndef OPENSSL_NO_ENGINE
        BIO_printf(bio_err,
                   "-engine e      use engine e, possibly a hardware device.\n");
# endif
        BIO_printf(bio_err, "-passin arg    input file pass phrase source\n");
        BIO_printf(bio_err, "-rand file%cfile%c...\n", LIST_SEPARATOR_CHAR,
                   LIST_SEPARATOR_CHAR);
        BIO_printf(bio_err,
                   "               load the file (or the files in the directory) into\n");
        BIO_printf(bio_err, "               the random number generator\n");
        BIO_printf(bio_err,
                   "cert.pem       recipient certificate(s) for encryption\n");
        goto end;
    }
# ifndef OPENSSL_NO_ENGINE
    e = setup_engine(bio_err, engine, 0);
# endif

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

    if (need_rand) {
        app_RAND_load_file(NULL, bio_err, (inrand != NULL));
        if (inrand != NULL)
            BIO_printf(bio_err, "%ld semi-random bytes loaded\n",
                       app_RAND_load_files(inrand));
    }

    ret = 2;

    if (!(operation & SMIME_SIGNERS))
        flags &= ~CMS_DETACHED;

    if (operation & SMIME_OP) {
        if (outformat == FORMAT_ASN1)
            outmode = "wb";
    } else {
        if (flags & CMS_BINARY)
            outmode = "wb";
    }

    if (operation & SMIME_IP) {
        if (informat == FORMAT_ASN1)
            inmode = "rb";
    } else {
        if (flags & CMS_BINARY)
            inmode = "rb";
    }

    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 (*args && !encerts)
            encerts = sk_X509_new_null();
        while (*args) {
            if (!(cert = load_cert(bio_err, *args, FORMAT_PEM,
                                   NULL, e, "recipient certificate file")))
                goto end;
            sk_X509_push(encerts, cert);
            cert = NULL;
            args++;
        }
    }

    if (certfile) {
        if (!(other = load_certs(bio_err, certfile, FORMAT_PEM, NULL,
                                 e, "certificate file"))) {
            ERR_print_errors(bio_err);
            goto end;
        }
    }

    if (recipfile && (operation == SMIME_DECRYPT)) {
        if (!(recip = load_cert(bio_err, recipfile, FORMAT_PEM, NULL,
                                e, "recipient certificate file"))) {
            ERR_print_errors(bio_err);
            goto end;
        }
    }

    if (operation == SMIME_SIGN_RECEIPT) {
        if (!(signer = load_cert(bio_err, signerfile, FORMAT_PEM, NULL,
                                 e, "receipt signer certificate file"))) {
            ERR_print_errors(bio_err);
            goto end;
        }
    }

    if (operation == SMIME_DECRYPT) {
        if (!keyfile)
            keyfile = recipfile;
    } else if ((operation == SMIME_SIGN) || (operation == SMIME_SIGN_RECEIPT)) {
        if (!keyfile)
            keyfile = signerfile;
    } else
        keyfile = NULL;

    if (keyfile) {
        key = load_key(bio_err, keyfile, keyform, 0, passin, e,
                       "signing key file");
        if (!key)
            goto end;
    }

    if (infile) {
        if (!(in = BIO_new_file(infile, inmode))) {
            BIO_printf(bio_err, "Can't open input file %s\n", infile);
            goto end;
        }
    } else
        in = BIO_new_fp(stdin, BIO_NOCLOSE);

    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) {
            BIO_printf(bio_err, "Error reading S/MIME message\n");
            goto end;
        }
        if (contfile) {
            BIO_free(indata);
            if (!(indata = BIO_new_file(contfile, "rb"))) {
                BIO_printf(bio_err, "Can't read content file %s\n", contfile);
                goto end;
            }
        }
        if (certsoutfile) {
            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) {
        char *rctmode = (rctformat == FORMAT_ASN1) ? "rb" : "r";
        if (!(rctin = BIO_new_file(rctfile, rctmode))) {
            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) {
            BIO_printf(bio_err, "Error reading receipt\n");
            goto end;
        }
    }

    if (outfile) {
        if (!(out = BIO_new_file(outfile, outmode))) {
            BIO_printf(bio_err, "Can't open output file %s\n", outfile);
            goto end;
        }
    } else {
        out = BIO_new_fp(stdout, BIO_NOCLOSE);
# ifdef OPENSSL_SYS_VMS
        {
            BIO *tmpbio = BIO_new(BIO_f_linebuffer());
            out = BIO_push(tmpbio, out);
        }
# endif
    }

    if ((operation == SMIME_VERIFY) || (operation == SMIME_VERIFY_RECEIPT)) {
        if (!(store = setup_verify(bio_err, CAfile, CApath)))
            goto end;
        X509_STORE_set_verify_cb(store, cms_cb);
        if (vpm)
            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)
            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)
                goto end;
            if (kparam) {
                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) {
            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) {
            pwri_tmp = (unsigned char *)BUF_strdup((char *)pwri_pass);
            if (!pwri_tmp)
                goto end;
            if (!CMS_add0_recipient_password(cms,
                                             -1, NID_undef, NID_undef,
                                             pwri_tmp, -1, 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)
            goto end;
        si = sk_CMS_SignerInfo_value(sis, 0);
        srcms = CMS_sign_receipt(si, signer, key, other, flags);
        if (!srcms)
            goto end;
        CMS_ContentInfo_free(cms);
        cms = srcms;
    } else if (operation & SMIME_SIGNERS) {
        int i;
        /*
         * If detached data content we enable streaming if S/MIME output
         * format.
         */
        if (operation == SMIME_SIGN) {

            if (flags & CMS_DETACHED) {
                if (outformat == FORMAT_SMIME)
                    flags |= CMS_STREAM;
            }
            flags |= CMS_PARTIAL;
            cms = CMS_sign(NULL, NULL, other, in, flags);
            if (!cms)
                goto end;
            if (econtent_type)
                CMS_set1_eContentType(cms, econtent_type);

            if (rr_to) {
                rr = make_receipt_request(rr_to, rr_allorfirst, rr_from);
                if (!rr) {
                    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(bio_err, signerfile, FORMAT_PEM, NULL,
                               e, "signer certificate");
            if (!signer)
                goto end;
            key = load_key(bio_err, keyfile, keyform, 0, passin, e,
                           "signing key file");
            if (!key)
                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)
                goto end;
            if (kparam) {
                EVP_PKEY_CTX *pctx;
                pctx = CMS_SignerInfo_get0_pkey_ctx(si);
                if (!cms_set_pkey_param(pctx, kparam->param))
                    goto end;
            }
            if (rr && !CMS_add1_ReceiptRequest(si, rr))
                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)) {
            if (!CMS_final(cms, in, NULL, flags))
                goto end;
        }
    }

    if (!cms) {
        BIO_printf(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) {
            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) {
            if (!CMS_decrypt_set1_pkey(cms, key, recip)) {
                BIO_puts(bio_err, "Error decrypting CMS using private key\n");
                goto end;
            }
        }

        if (pwri_pass) {
            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_printf(bio_err, "Error decrypting CMS structure\n");
            goto end;
        }
    } else if (operation == SMIME_DATAOUT) {
        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_printf(bio_err, "Verification successful\n");
        else {
            BIO_printf(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, "Verification successful\n");
        else {
            BIO_printf(bio_err, "Verification failure\n");
            if (verify_retcode)
                ret = verify_err + 32;
            goto end;
        }
        if (signerfile) {
            STACK_OF(X509) *signers;
            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(bio_err, cms);

    } else if (operation == SMIME_VERIFY_RECEIPT) {
        if (CMS_verify_receipt(rcms, cms, other, store, flags) > 0)
            BIO_printf(bio_err, "Verification successful\n");
        else {
            BIO_printf(bio_err, "Verification failure\n");
            goto end;
        }
    } else {
        if (noout) {
            if (print)
                CMS_ContentInfo_print_ctx(out, cms, 0, NULL);
        } else if (outformat == FORMAT_SMIME) {
            if (to)
                BIO_printf(out, "To: %s\n", to);
            if (from)
                BIO_printf(out, "From: %s\n", from);
            if (subject)
                BIO_printf(out, "Subject: %s\n", subject);
            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_printf(bio_err, "Bad output format for CMS file\n");
            goto end;
        }
        if (ret <= 0) {
            ret = 6;
            goto end;
        }
    }
    ret = 0;
 end:
    if (ret)
        ERR_print_errors(bio_err);
    if (need_rand)
        app_RAND_write_file(NULL, bio_err);
    sk_X509_pop_free(encerts, X509_free);
    sk_X509_pop_free(other, X509_free);
    if (vpm)
        X509_VERIFY_PARAM_free(vpm);
    if (sksigners)
        sk_OPENSSL_STRING_free(sksigners);
    if (skkeys)
        sk_OPENSSL_STRING_free(skkeys);
    if (secret_key)
        OPENSSL_free(secret_key);
    if (secret_keyid)
        OPENSSL_free(secret_keyid);
    if (pwri_tmp)
        OPENSSL_free(pwri_tmp);
    if (econtent_type)
        ASN1_OBJECT_free(econtent_type);
    if (rr)
        CMS_ReceiptRequest_free(rr);
    if (rr_to)
        sk_OPENSSL_STRING_free(rr_to);
    if (rr_from)
        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;
    }
    X509_STORE_free(store);
    X509_free(cert);
    X509_free(recip);
    X509_free(signer);
    EVP_PKEY_free(key);
    CMS_ContentInfo_free(cms);
    CMS_ContentInfo_free(rcms);
    BIO_free(rctin);
    BIO_free(in);
    BIO_free(indata);
    BIO_free_all(out);
    if (passin)
        OPENSSL_free(passin);
    return (ret);
}
コード例 #2
0
ファイル: cms.c プロジェクト: Muffo/openssl
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, *inrand = 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 need_rand = 0, 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_NOOLDMIME:
            flags |= CMS_NOOLDMIMETYPE;
            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:
            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:
            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:
            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_RAND:
            inrand = opt_arg();
            need_rand = 1;
            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) {
                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) {
                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)
                    keyidx += sk_X509_num(encerts);
            } else {
                if (keyfile || signerfile)
                    keyidx++;
                if (skkeys)
                    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_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) && !rr_to) {
        BIO_puts(bio_err, "No Signed Receipts Recipients\n");
        goto opthelp;
    }

    if (!(operation & SMIME_SIGNERS) && (rr_to || rr_from)) {
        BIO_puts(bio_err, "Signed receipts only allowed with -sign\n");
        goto opthelp;
    }
    if (!(operation & SMIME_SIGNERS) && (skkeys || sksigners)) {
        BIO_puts(bio_err, "Multiple signers or keys not allowed\n");
        goto opthelp;
    }

    if (operation & SMIME_SIGNERS) {
        if (keyfile && !signerfile) {
            BIO_puts(bio_err, "Illegal -inkey without -signer\n");
            goto opthelp;
        }
        /* Check to see if any final signer needs to be appended */
        if (signerfile) {
            if (!sksigners
                && (sksigners = sk_OPENSSL_STRING_new_null()) == NULL)
                goto end;
            sk_OPENSSL_STRING_push(sksigners, signerfile);
            if (!skkeys && (skkeys = sk_OPENSSL_STRING_new_null()) == NULL)
                goto end;
            if (!keyfile)
                keyfile = signerfile;
            sk_OPENSSL_STRING_push(skkeys, keyfile);
        }
        if (!sksigners) {
            BIO_printf(bio_err, "No signer certificate specified\n");
            goto opthelp;
        }
        signerfile = NULL;
        keyfile = NULL;
        need_rand = 1;
    }

    else if (operation == SMIME_DECRYPT) {
        if (!recipfile && !keyfile && !secret_key && !pwri_pass) {
            BIO_printf(bio_err,
                       "No recipient certificate or key specified\n");
            goto opthelp;
        }
    } else if (operation == SMIME_ENCRYPT) {
        if (*argv == NULL && !secret_key && !pwri_pass && !encerts) {
            BIO_printf(bio_err, "No recipient(s) certificate(s) specified\n");
            goto opthelp;
        }
        need_rand = 1;
    } else if (!operation)
        goto opthelp;

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

    if (need_rand) {
        app_RAND_load_file(NULL, (inrand != NULL));
        if (inrand != NULL)
            BIO_printf(bio_err, "%ld semi-random bytes loaded\n",
                       app_RAND_load_files(inrand));
    }

    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)
            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) {
        if (!load_certs(certfile, &other, FORMAT_PEM, NULL,
                        "certificate file")) {
            ERR_print_errors(bio_err);
            goto end;
        }
    }

    if (recipfile && (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)
            keyfile = recipfile;
    } else if ((operation == SMIME_SIGN) || (operation == SMIME_SIGN_RECEIPT)) {
        if (!keyfile)
            keyfile = signerfile;
    } else
        keyfile = NULL;

    if (keyfile) {
        key = load_key(keyfile, keyform, 0, passin, e, "signing key file");
        if (!key)
            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) {
            BIO_printf(bio_err, "Error reading S/MIME message\n");
            goto end;
        }
        if (contfile) {
            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) {
            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) {
        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) {
            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)
            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)
                goto end;
            if (kparam) {
                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) {
            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) {
            pwri_tmp = (unsigned char *)OPENSSL_strdup((char *)pwri_pass);
            if (!pwri_tmp)
                goto end;
            if (!CMS_add0_recipient_password(cms,
                                             -1, NID_undef, NID_undef,
                                             pwri_tmp, -1, 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)
            goto end;
        si = sk_CMS_SignerInfo_value(sis, 0);
        srcms = CMS_sign_receipt(si, signer, key, other, flags);
        if (!srcms)
            goto end;
        CMS_ContentInfo_free(cms);
        cms = srcms;
    } else if (operation & SMIME_SIGNERS) {
        int i;
        /*
         * If detached data content we enable streaming if S/MIME output
         * format.
         */
        if (operation == SMIME_SIGN) {

            if (flags & CMS_DETACHED) {
                if (outformat == FORMAT_SMIME)
                    flags |= CMS_STREAM;
            }
            flags |= CMS_PARTIAL;
            cms = CMS_sign(NULL, NULL, other, in, flags);
            if (!cms)
                goto end;
            if (econtent_type)
                CMS_set1_eContentType(cms, econtent_type);

            if (rr_to) {
                rr = make_receipt_request(rr_to, rr_allorfirst, rr_from);
                if (!rr) {
                    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_PEM, "signer certificate");
            if (!signer)
                goto end;
            key = load_key(keyfile, keyform, 0, passin, e, "signing key file");
            if (!key)
                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)
                goto end;
            if (kparam) {
                EVP_PKEY_CTX *pctx;
                pctx = CMS_SignerInfo_get0_pkey_ctx(si);
                if (!cms_set_pkey_param(pctx, kparam->param))
                    goto end;
            }
            if (rr && !CMS_add1_ReceiptRequest(si, rr))
                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)) {
            if (!CMS_final(cms, in, NULL, flags))
                goto end;
        }
    }

    if (!cms) {
        BIO_printf(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) {
            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) {
            if (!CMS_decrypt_set1_pkey(cms, key, recip)) {
                BIO_puts(bio_err, "Error decrypting CMS using private key\n");
                goto end;
            }
        }

        if (pwri_pass) {
            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_printf(bio_err, "Error decrypting CMS structure\n");
            goto end;
        }
    } else if (operation == SMIME_DATAOUT) {
        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_printf(bio_err, "Verification successful\n");
        else {
            BIO_printf(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, "Verification successful\n");
        else {
            BIO_printf(bio_err, "Verification failure\n");
            if (verify_retcode)
                ret = verify_err + 32;
            goto end;
        }
        if (signerfile) {
            STACK_OF(X509) *signers;
            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_printf(bio_err, "Verification successful\n");
        else {
            BIO_printf(bio_err, "Verification failure\n");
            goto end;
        }
    } else {
        if (noout) {
            if (print)
                CMS_ContentInfo_print_ctx(out, cms, 0, NULL);
        } else if (outformat == FORMAT_SMIME) {
            if (to)
                BIO_printf(out, "To: %s%s", to, mime_eol);
            if (from)
                BIO_printf(out, "From: %s%s", from, mime_eol);
            if (subject)
                BIO_printf(out, "Subject: %s%s", subject, mime_eol);
            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_printf(bio_err, "Bad output format for CMS file\n");
            goto end;
        }
        if (ret <= 0) {
            ret = 6;
            goto end;
        }
    }
    ret = 0;
 end:
    if (ret)
        ERR_print_errors(bio_err);
    if (need_rand)
        app_RAND_write_file(NULL);
    sk_X509_pop_free(encerts, X509_free);
    sk_X509_pop_free(other, X509_free);
    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;
    }
    X509_STORE_free(store);
    X509_free(cert);
    X509_free(recip);
    X509_free(signer);
    EVP_PKEY_free(key);
    CMS_ContentInfo_free(cms);
    CMS_ContentInfo_free(rcms);
    BIO_free(rctin);
    BIO_free(in);
    BIO_free(indata);
    BIO_free_all(out);
    OPENSSL_free(passin);
    return (ret);
}