예제 #1
0
/**
 * @brief prints the usage of the program to the stderr output
 *
 * If message is set, program is exitet with 1 (error)
 * @param message message in case of an error
 */
static void
usage(const char *message)
{
	fprintf(stderr,
		"Usage: scepclient\n"
		" --help (-h)                       show usage and exit\n"
		" --version (-v)                    show version and exit\n"
		" --quiet (-q)                      do not write log output to stderr\n"
		" --in (-i) <type>[=<filename>]     use <filename> of <type> for input \n"
		"                                   <type> = pkcs1 | cacert-enc |  cacert-sig\n"
		"                                   - if no pkcs1 input is defined, a \n"
		"                                     RSA key will be generated\n"
		"                                   - if no filename is given, default is used\n"
		" --out (-o) <type>[=<filename>]    write output of <type> to <filename>\n"
		"                                   multiple outputs are allowed\n"
		"                                   <type> = pkcs1 | pkcs10 | pkcs7 | cert-self | cert | cacert\n"
		"                                   - type cacert defines filename prefix of\n"
		"                                     received CA certificate(s)\n"
		"                                   - if no filename is given, default is used\n"
		" --optionsfrom (-+) <filename>     reads additional options from given file\n"
		" --force (-f)                      force existing file(s)\n"
		"\n"
		"Options for key generation (pkcs1):\n"
		" --keylength (-k) <bits>           key length for RSA key generation\n"
											"(default: 2048 bits)\n"
		"\n"
		"Options for validity:\n"
		" --days (-D) <days>                validity in days\n"
		" --startdate (-S) <YYMMDDHHMMSS>Z  not valid before date\n"
		" --enddate   (-E) <YYMMDDHHMMSS>Z  not valid after date\n"
		"\n"
		"Options for request generation (pkcs10):\n"
		" --dn (-d) <dn>                    comma separated list of distinguished names\n"
		" --subjectAltName (-s) <t>=<v>     include subjectAltName in certificate request\n"
		"                                   <t> =  email | dns | ip \n"
		" --password (-p) <pw>              challenge password\n"
		"                                   - if pw is '%%prompt', password gets prompted for\n"
		" --algorithm (-a) <algo>           use specified algorithm for PKCS#7 encryption\n"
		"                                   <algo> = des | 3des (default) | aes128| aes192 | \n"
		"                                   aes256 | camellia128 | camellia192 | camellia256\n"
		"\n"
		"Options for enrollment (cert):\n"
		" --url (-u) <url>                  url of the SCEP server\n"
		" --method (-m) post | get          http request type\n"
		" --interval (-t) <seconds>         manual mode poll interval in seconds (default 20s)\n"
		" --maxpolltime (-x) <seconds>      max poll time in seconds when in manual mode\n"
		"                                   (default: unlimited)\n"
#ifdef DEBUG
		"\n"
		"Debugging output:\n"
		" --debug-all (-A)                  show everything except private\n"
		" --debug-parsing (-P)              show parsing relevant stuff\n"
		" --debug-raw (-R)                  show raw hex dumps\n"
		" --debug-control (-C)              show control flow output\n"
		" --debug-controlmore (-M)          show more control flow\n"
		" --debug-private (-X)              show sensitive data (private keys, etc.)\n"
#endif
		);
	exit_scepclient(message);
}
예제 #2
0
/**
 * @brief main of scepclient
 *
 * @param argc number of arguments
 * @param argv pointer to the argument values
 */
int main(int argc, char **argv)
{
	/* external values */
	extern char * optarg;
	extern int optind;

	/* type of input and output files */
	typedef enum {
		PKCS1      =  0x01,
		PKCS10     =  0x02,
		PKCS7      =  0x04,
		CERT_SELF  =  0x08,
		CERT       =  0x10,
		CACERT_ENC =  0x20,
		CACERT_SIG =  0x40
	} scep_filetype_t;

	/* filetype to read from, defaults to "generate a key" */
	scep_filetype_t filetype_in = 0;

	/* filetype to write to, no default here */
	scep_filetype_t filetype_out = 0;

	/* input files */
	char *file_in_pkcs1      = DEFAULT_FILENAME_PKCS1;
	char *file_in_cacert_enc = DEFAULT_FILENAME_CACERT_ENC;
	char *file_in_cacert_sig = DEFAULT_FILENAME_CACERT_SIG;

	/* output files */
	char *file_out_pkcs1     = DEFAULT_FILENAME_PKCS1;
	char *file_out_pkcs10    = DEFAULT_FILENAME_PKCS10;
	char *file_out_pkcs7     = DEFAULT_FILENAME_PKCS7;
	char *file_out_cert_self = DEFAULT_FILENAME_CERT_SELF;
	char *file_out_cert      = DEFAULT_FILENAME_CERT;
	char *file_out_prefix_cacert = DEFAULT_FILENAME_PREFIX_CACERT;

	/* by default user certificate is requested */
	bool request_ca_certificate = FALSE;

	/* by default existing files are not overwritten */
	bool force = FALSE;

	/* length of RSA key in bits */
	u_int rsa_keylength = DEFAULT_RSA_KEY_LENGTH;

	/* validity of self-signed certificate */
	time_t validity  = DEFAULT_CERT_VALIDITY;
	time_t notBefore = 0;
	time_t notAfter  = 0;

	/* distinguished name for requested certificate, ASCII format */
	char *distinguishedName = NULL;

	/* challenge password */
	char challenge_password_buffer[MAX_PASSWORD_LENGTH];

	/* symmetric encryption algorithm used by pkcs7, default is 3DES */
	int pkcs7_symmetric_cipher = OID_3DES_EDE_CBC;

	/* digest algorithm used by pkcs7, default is SHA-1 */
	int pkcs7_digest_alg = OID_SHA1;

	/* signature algorithm used by pkcs10, default is SHA-1 */
	hash_algorithm_t pkcs10_signature_alg = HASH_SHA1;

	/* URL of the SCEP-Server */
	char *scep_url = NULL;

	/* http request method, default is GET */
	bool http_get_request = TRUE;

	/* poll interval time in manual mode in seconds */
	u_int poll_interval = DEFAULT_POLL_INTERVAL;

	/* maximum poll time */
	u_int max_poll_time = 0;

	err_t ugh = NULL;

	/* initialize library */
	if (!library_init(NULL))
	{
		library_deinit();
		exit(SS_RC_LIBSTRONGSWAN_INTEGRITY);
	}
	if (lib->integrity &&
		!lib->integrity->check_file(lib->integrity, "scepclient", argv[0]))
	{
		fprintf(stderr, "integrity check of scepclient failed\n");
		library_deinit();
		exit(SS_RC_DAEMON_INTEGRITY);
	}

	/* initialize global variables */
	pkcs1             = chunk_empty;
	pkcs7             = chunk_empty;
	serialNumber      = chunk_empty;
	transID           = chunk_empty;
	fingerprint       = chunk_empty;
	encoding          = chunk_empty;
	pkcs10_encoding   = chunk_empty;
	issuerAndSubject  = chunk_empty;
	challengePassword = chunk_empty;
	getCertInitial    = chunk_empty;
	scep_response     = chunk_empty;
	subjectAltNames   = linked_list_create();
	options           = options_create();
	log_to_stderr     = TRUE;

	for (;;)
	{
		static const struct option long_opts[] = {
			/* name, has_arg, flag, val */
			{ "help", no_argument, NULL, 'h' },
			{ "version", no_argument, NULL, 'v' },
			{ "optionsfrom", required_argument, NULL, '+' },
			{ "quiet", no_argument, NULL, 'q' },
			{ "in", required_argument, NULL, 'i' },
			{ "out", required_argument, NULL, 'o' },
			{ "force", no_argument, NULL, 'f' },
			{ "keylength", required_argument, NULL, 'k' },
			{ "dn", required_argument, NULL, 'd' },
			{ "days", required_argument, NULL, 'D' },
			{ "startdate", required_argument, NULL, 'S' },
			{ "enddate", required_argument, NULL, 'E' },
			{ "subjectAltName", required_argument, NULL, 's' },
			{ "password", required_argument, NULL, 'p' },
			{ "algorithm", required_argument, NULL, 'a' },
			{ "url", required_argument, NULL, 'u' },
			{ "method", required_argument, NULL, 'm' },
			{ "interval", required_argument, NULL, 't' },
			{ "maxpolltime", required_argument, NULL, 'x' },
#ifdef DEBUG
			{ "debug-all", no_argument, NULL, 'A' },
			{ "debug-parsing", no_argument, NULL, 'P'},
			{ "debug-raw", no_argument, NULL, 'R'},
			{ "debug-control", no_argument, NULL, 'C'},
			{ "debug-controlmore", no_argument, NULL, 'M'},
			{ "debug-private", no_argument, NULL, 'X'},
#endif
			{ 0,0,0,0 }
		};

		/* parse next option */
		int c = getopt_long(argc, argv, "hv+:qi:o:fk:d:s:p:a:u:m:t:x:APRCMS", long_opts, NULL);

		switch (c)
		{
		case EOF:       /* end of flags */
			break;

		case 'h':       /* --help */
			usage(NULL);

		case 'v':       /* --version */
			version();

		case 'q':       /* --quiet */
			log_to_stderr = FALSE;
			continue;

		case 'i':       /* --in <type> [= <filename>] */
			{
				char *filename = strstr(optarg, "=");

				if (filename)
				{
					/* replace '=' by '\0' */
					*filename = '\0';
					/* set pointer to start of filename */
					filename++;
				}
				if (strcaseeq("pkcs1", optarg))
				{
					filetype_in |= PKCS1;
					if (filename)
						file_in_pkcs1 = filename;
				}
				else if (strcaseeq("cacert-enc", optarg))
				{
					filetype_in |= CACERT_ENC;
					if (filename)
						file_in_cacert_enc = filename;
				}
				else if (strcaseeq("cacert-sig", optarg))
				{
					filetype_in |= CACERT_SIG;
					if (filename)
						 file_in_cacert_sig = filename;
				}
				else
				{
					usage("invalid --in file type");
				}
				continue;
			}

		case 'o':       /* --out <type> [= <filename>] */
			{
				char *filename = strstr(optarg, "=");

				if (filename)
				{
					/* replace '=' by '\0' */
					*filename = '\0';
					/* set pointer to start of filename */
					filename++;
				}
				if (strcaseeq("pkcs1", optarg))
				{
					filetype_out |= PKCS1;
					if (filename)
						file_out_pkcs1 = filename;
				}
				else if (strcaseeq("pkcs10", optarg))
				{
					filetype_out |= PKCS10;
					if (filename)
						file_out_pkcs10 = filename;
				}
				else if (strcaseeq("pkcs7", optarg))
				{
					filetype_out |= PKCS7;
					if (filename)
						file_out_pkcs7 = filename;
				}
				else if (strcaseeq("cert-self", optarg))
				{
					filetype_out |= CERT_SELF;
					if (filename)
						file_out_cert_self = filename;
				}
				else if (strcaseeq("cert", optarg))
				{
					filetype_out |= CERT;
					if (filename)
						file_out_cert = filename;
				}
				else if (strcaseeq("cacert", optarg))
				{
					request_ca_certificate = TRUE;
					if (filename)
						file_out_prefix_cacert = filename;
				}
				else
				{
					usage("invalid --out file type");
				}
				continue;
			}

		case 'f':       /* --force */
			force = TRUE;
			continue;

		case '+':       /* --optionsfrom <filename> */
			if (!options->from(options, optarg, &argc, &argv, optind))
			{
				exit_scepclient("optionsfrom failed");
			}
			continue;

		case 'k':        /* --keylength <length> */
			{
				div_t q;

				rsa_keylength = atoi(optarg);
				if (rsa_keylength == 0)
					usage("invalid keylength");

				/* check if key length is a multiple of 8 bits */
				q = div(rsa_keylength, 2*BITS_PER_BYTE);
				if (q.rem != 0)
				{
					exit_scepclient("keylength is not a multiple of %d bits!"
						, 2*BITS_PER_BYTE);
				}
				continue;
			}

		case 'D':       /* --days */
			if (optarg == NULL || !isdigit(optarg[0]))
				usage("missing number of days");
			{
				char *endptr;
				long days = strtol(optarg, &endptr, 0);

				if (*endptr != '\0' || endptr == optarg
				|| days <= 0)
					usage("<days> must be a positive number");
				validity = 24*3600*days;
			}
			continue;

		case 'S':       /* --startdate */
			if (optarg == NULL || strlen(optarg) != 13 || optarg[12] != 'Z')
				usage("date format must be YYMMDDHHMMSSZ");
			{
				chunk_t date = { optarg, 13 };
				notBefore = asn1_to_time(&date, ASN1_UTCTIME);
			}
			continue;

		case 'E':       /* --enddate */
			if (optarg == NULL || strlen(optarg) != 13 || optarg[12] != 'Z')
				usage("date format must be YYMMDDHHMMSSZ");
			{
				chunk_t date = { optarg, 13 };
				notAfter = asn1_to_time(&date, ASN1_UTCTIME);
			}
			continue;

		case 'd':       /* --dn */
			if (distinguishedName)
				usage("only one distinguished name allowed");
			distinguishedName = optarg;
			continue;

		case 's':       /* --subjectAltName */
			{
				char *value = strstr(optarg, "=");

				if (value)
				{
					/* replace '=' by '\0' */
					*value = '\0';
					/* set pointer to start of value */
					value++;
				}

				if (strcaseeq("email", optarg) ||
					strcaseeq("dns", optarg)   ||
					strcaseeq("ip", optarg))
				{
					subjectAltNames->insert_last(subjectAltNames,
								 identification_create_from_string(value));
					continue;
				}
				else
				{
					usage("invalid --subjectAltName type");
					continue;
				}
			}

		case 'p':       /* --password */
			if (challengePassword.len > 0)
			{
				usage("only one challenge password allowed");
			}
			if (strcaseeq("%prompt", optarg))
			{
				printf("Challenge password: "******"challenge password could not be read");
				}
			}
			else
			{
				challengePassword.ptr = optarg;
				challengePassword.len = strlen(optarg);
			}
			continue;

		case 'u':       /* -- url */
			if (scep_url)
			{
				usage("only one URL argument allowed");
			}
			scep_url = optarg;
			continue;

		case 'm':       /* --method */
			if (strcaseeq("get", optarg))
			{
				http_get_request = TRUE;
			}
			else if (strcaseeq("post", optarg))
			{
				http_get_request = FALSE;
			}
			else
			{
				usage("invalid http request method specified");
			}
			continue;

		case 't':       /* --interval */
			poll_interval = atoi(optarg);
			if (poll_interval <= 0)
			{
				usage("invalid interval specified");
			}
			continue;

		case 'x':       /* --maxpolltime */
			max_poll_time = atoi(optarg);
			if (max_poll_time < 0)
			{
				usage("invalid maxpolltime specified");
			}
			continue;

		case 'a':       /*--algorithm */
		{
			const proposal_token_t *token;

			token = proposal_get_token(optarg, strlen(optarg));
			if (token == NULL || token->type != ENCRYPTION_ALGORITHM)
			{
				usage("invalid algorithm specified");
			}
			pkcs7_symmetric_cipher = encryption_algorithm_to_oid(
										token->algorithm, token->keysize);
			if (pkcs7_symmetric_cipher == OID_UNKNOWN)
			{
				usage("unsupported encryption algorithm specified");
			}
			continue;
		}
#ifdef DEBUG
		case 'A':       /* --debug-all */
			base_debugging |= DBG_ALL;
			continue;
		case 'P':       /* debug parsing */
			base_debugging |= DBG_PARSING;
			continue;
		case 'R':       /* debug raw */
			base_debugging |= DBG_RAW;
			continue;
		case 'C':       /* debug control */
			base_debugging |= DBG_CONTROL;
			continue;
		case 'M':       /* debug control more */
			base_debugging |= DBG_CONTROLMORE;
			continue;
		case 'X':       /* debug private */
			base_debugging |= DBG_PRIVATE;
			continue;
#endif
		default:
			usage("unknown option");
		}
		/* break from loop */
		break;
	}
	cur_debugging = base_debugging;

	init_log("scepclient");

	/* load plugins, further infrastructure may need it */
	if (!lib->plugins->load(lib->plugins, NULL,
			lib->settings->get_str(lib->settings, "scepclient.load", PLUGINS)))
	{
		exit_scepclient("plugin loading failed");
	}
	print_plugins();

	if ((filetype_out == 0) && (!request_ca_certificate))
	{
		usage ("--out filetype required");
	}
	if (request_ca_certificate && (filetype_out > 0 || filetype_in > 0))
	{
		usage("in CA certificate request, no other --in or --out option allowed");
	}

	/* check if url is given, if cert output defined */
	if (((filetype_out & CERT) || request_ca_certificate) && !scep_url)
	{
		usage("URL of SCEP server required");
	}

	/* check for sanity of --in/--out */
	if (!filetype_in && (filetype_in > filetype_out))
	{
		usage("cannot generate --out of given --in!");
	}

	/*
	 * input of PKCS#1 file
	 */
	if (filetype_in & PKCS1)    /* load an RSA key pair from file */
	{
		char *path = concatenate_paths(PRIVATE_KEY_PATH, file_in_pkcs1);

		private_key = lib->creds->create(lib->creds, CRED_PRIVATE_KEY, KEY_RSA,
										 BUILD_FROM_FILE, path, BUILD_END);
	}
	else                                /* generate an RSA key pair */
	{
		private_key = lib->creds->create(lib->creds, CRED_PRIVATE_KEY, KEY_RSA,
										 BUILD_KEY_SIZE, rsa_keylength,
										 BUILD_END);
	}
	if (private_key == NULL)
	{
		exit_scepclient("no RSA private key available");
	}
	public_key = private_key->get_public_key(private_key);

	/* check for minimum key length */
	if (private_key->get_keysize(private_key) < RSA_MIN_OCTETS / BITS_PER_BYTE)
	{
		exit_scepclient("length of RSA key has to be at least %d bits"
			,RSA_MIN_OCTETS * BITS_PER_BYTE);
	}

	/*
	 * input of PKCS#10 file
	 */
	if (filetype_in & PKCS10)
	{
		/* user wants to load a pkcs10 request
		 * operation is not yet supported
		 * would require a PKCS#10 parsing function

		pkcs10 = pkcs10_read_from_file(file_in_pkcs10);

		 */
	}
	else
	{
		if (distinguishedName == NULL)
		{
			char buf[BUF_LEN];
			int n = sprintf(buf, DEFAULT_DN);

			/* set the common name to the hostname */
			if (gethostname(buf + n, BUF_LEN - n) || strlen(buf) == n)
			{
				exit_scepclient("no hostname defined, use "
								"--dn <distinguished name> option");
			}
			distinguishedName = buf;
		}

		DBG(DBG_CONTROL,
			DBG_log("dn: '%s'", distinguishedName);
		)
		subject = identification_create_from_string(distinguishedName);
		if (subject->get_type(subject) != ID_DER_ASN1_DN)
		{
			exit_scepclient("parsing of distinguished name failed");
		}

		DBG(DBG_CONTROL,
			DBG_log("building pkcs10 object:")
		)
		pkcs10_req = lib->creds->create(lib->creds, CRED_CERTIFICATE,
						CERT_PKCS10_REQUEST,
						BUILD_SIGNING_KEY, private_key,
						BUILD_SUBJECT, subject,
						BUILD_SUBJECT_ALTNAMES, subjectAltNames,
						BUILD_CHALLENGE_PWD, challengePassword,
						BUILD_DIGEST_ALG, pkcs10_signature_alg,
						BUILD_END);
		if (!pkcs10_req)
		{
			exit_scepclient("generating pkcs10 request failed");
		}
		pkcs10_req->get_encoding(pkcs10_req, CERT_ASN1_DER, &pkcs10_encoding);
		fingerprint = scep_generate_pkcs10_fingerprint(pkcs10_encoding);
		plog("  fingerprint:    %s", fingerprint.ptr);
	}
예제 #3
0
/**
 * @brief main of scepclient
 *
 * @param argc number of arguments
 * @param argv pointer to the argument values
 */
int main(int argc, char **argv)
{
    /* external values */
    extern char * optarg;
    extern int optind;

    /* type of input and output files */
    typedef enum {
        PKCS1      =  0x01,
        PKCS10     =  0x02,
        PKCS7      =  0x04,
        CERT_SELF  =  0x08,
        CERT       =  0x10,
        CACERT_ENC =  0x20,
        CACERT_SIG =  0x40,
    } scep_filetype_t;

    /* filetype to read from, defaults to "generate a key" */
    scep_filetype_t filetype_in = 0;

    /* filetype to write to, no default here */
    scep_filetype_t filetype_out = 0;

    /* input files */
    char *file_in_pkcs1      = DEFAULT_FILENAME_PKCS1;
    char *file_in_pkcs10     = DEFAULT_FILENAME_PKCS10;
    char *file_in_cert_self  = DEFAULT_FILENAME_CERT_SELF;
    char *file_in_cacert_enc = DEFAULT_FILENAME_CACERT_ENC;
    char *file_in_cacert_sig = DEFAULT_FILENAME_CACERT_SIG;

    /* output files */
    char *file_out_pkcs1     = DEFAULT_FILENAME_PKCS1;
    char *file_out_pkcs10    = DEFAULT_FILENAME_PKCS10;
    char *file_out_pkcs7     = DEFAULT_FILENAME_PKCS7;
    char *file_out_cert_self = DEFAULT_FILENAME_CERT_SELF;
    char *file_out_cert      = DEFAULT_FILENAME_CERT;
    char *file_out_ca_cert   = DEFAULT_FILENAME_CACERT_ENC;

    /* by default user certificate is requested */
    bool request_ca_certificate = FALSE;

    /* by default existing files are not overwritten */
    bool force = FALSE;

    /* length of RSA key in bits */
    u_int rsa_keylength = DEFAULT_RSA_KEY_LENGTH;

    /* validity of self-signed certificate */
    time_t validity  = DEFAULT_CERT_VALIDITY;
    time_t notBefore = 0;
    time_t notAfter  = 0;

    /* distinguished name for requested certificate, ASCII format */
    char *distinguishedName = NULL;

    /* challenge password */
    char challenge_password_buffer[MAX_PASSWORD_LENGTH];

    /* symmetric encryption algorithm used by pkcs7, default is DES */
    encryption_algorithm_t pkcs7_symmetric_cipher = ENCR_DES;
    size_t pkcs7_key_size = 0;

    /* digest algorithm used by pkcs7, default is MD5 */
    hash_algorithm_t pkcs7_digest_alg = HASH_MD5;

    /* signature algorithm used by pkcs10, default is MD5 */
    hash_algorithm_t pkcs10_signature_alg = HASH_MD5;

    /* URL of the SCEP-Server */
    char *scep_url = NULL;

    /* Name of CA to fetch CA certs for */
    char *ca_name = "CAIdentifier";

    /* http request method, default is GET */
    bool http_get_request = TRUE;

    /* poll interval time in manual mode in seconds */
    u_int poll_interval = DEFAULT_POLL_INTERVAL;

    /* maximum poll time */
    u_int max_poll_time = 0;

    err_t ugh = NULL;

    /* initialize library */
    if (!library_init(NULL))
    {
        library_deinit();
        exit(SS_RC_LIBSTRONGSWAN_INTEGRITY);
    }
    if (lib->integrity &&
            !lib->integrity->check_file(lib->integrity, "scepclient", argv[0]))
    {
        fprintf(stderr, "integrity check of scepclient failed\n");
        library_deinit();
        exit(SS_RC_DAEMON_INTEGRITY);
    }

    /* initialize global variables */
    pkcs1             = chunk_empty;
    pkcs7             = chunk_empty;
    serialNumber      = chunk_empty;
    transID           = chunk_empty;
    fingerprint       = chunk_empty;
    encoding          = chunk_empty;
    pkcs10_encoding   = chunk_empty;
    issuerAndSubject  = chunk_empty;
    challengePassword = chunk_empty;
    getCertInitial    = chunk_empty;
    scep_response     = chunk_empty;
    subjectAltNames   = linked_list_create();
    options           = options_create();

    for (;;)
    {
        static const struct option long_opts[] = {
            /* name, has_arg, flag, val */
            { "help", no_argument, NULL, 'h' },
            { "version", no_argument, NULL, 'v' },
            { "optionsfrom", required_argument, NULL, '+' },
            { "quiet", no_argument, NULL, 'q' },
            { "debug", required_argument, NULL, 'l' },
            { "in", required_argument, NULL, 'i' },
            { "out", required_argument, NULL, 'o' },
            { "force", no_argument, NULL, 'f' },
            { "httptimeout", required_argument, NULL, 'T' },
            { "keylength", required_argument, NULL, 'k' },
            { "dn", required_argument, NULL, 'd' },
            { "days", required_argument, NULL, 'D' },
            { "startdate", required_argument, NULL, 'S' },
            { "enddate", required_argument, NULL, 'E' },
            { "subjectAltName", required_argument, NULL, 's' },
            { "password", required_argument, NULL, 'p' },
            { "algorithm", required_argument, NULL, 'a' },
            { "url", required_argument, NULL, 'u' },
            { "caname", required_argument, NULL, 'c'},
            { "method", required_argument, NULL, 'm' },
            { "interval", required_argument, NULL, 't' },
            { "maxpolltime", required_argument, NULL, 'x' },
            { 0,0,0,0 }
        };

        /* parse next option */
        int c = getopt_long(argc, argv, "hv+:qi:o:fk:d:s:p:a:u:c:m:t:x:APRCMS", long_opts, NULL);

        switch (c)
        {
        case EOF:       /* end of flags */
            break;

        case 'h':       /* --help */
            usage(NULL);

        case 'v':       /* --version */
            version();

        case 'q':       /* --quiet */
            log_to_stderr = FALSE;
            continue;

        case 'l':		/* --debug <level> */
            default_loglevel = atoi(optarg);
            continue;

        case 'i':       /* --in <type> [= <filename>] */
        {
            char *filename = strstr(optarg, "=");

            if (filename)
            {
                /* replace '=' by '\0' */
                *filename = '\0';
                /* set pointer to start of filename */
                filename++;
            }
            if (strcaseeq("pkcs1", optarg))
            {
                filetype_in |= PKCS1;
                if (filename)
                    file_in_pkcs1 = filename;
            }
            else if (strcaseeq("pkcs10", optarg))
            {
                filetype_in |= PKCS10;
                if (filename)
                    file_in_pkcs10 = filename;
            }
            else if (strcaseeq("cacert-enc", optarg))
            {
                filetype_in |= CACERT_ENC;
                if (filename)
                    file_in_cacert_enc = filename;
            }
            else if (strcaseeq("cacert-sig", optarg))
            {
                filetype_in |= CACERT_SIG;
                if (filename)
                    file_in_cacert_sig = filename;
            }
            else if (strcaseeq("cert-self", optarg))
            {
                filetype_in |= CERT_SELF;
                if (filename)
                    file_in_cert_self = filename;
            }
            else
            {
                usage("invalid --in file type");
            }
            continue;
        }

        case 'o':       /* --out <type> [= <filename>] */
        {
            char *filename = strstr(optarg, "=");

            if (filename)
            {
                /* replace '=' by '\0' */
                *filename = '\0';
                /* set pointer to start of filename */
                filename++;
            }
            if (strcaseeq("pkcs1", optarg))
            {
                filetype_out |= PKCS1;
                if (filename)
                    file_out_pkcs1 = filename;
            }
            else if (strcaseeq("pkcs10", optarg))
            {
                filetype_out |= PKCS10;
                if (filename)
                    file_out_pkcs10 = filename;
            }
            else if (strcaseeq("pkcs7", optarg))
            {
                filetype_out |= PKCS7;
                if (filename)
                    file_out_pkcs7 = filename;
            }
            else if (strcaseeq("cert-self", optarg))
            {
                filetype_out |= CERT_SELF;
                if (filename)
                    file_out_cert_self = filename;
            }
            else if (strcaseeq("cert", optarg))
            {
                filetype_out |= CERT;
                if (filename)
                    file_out_cert = filename;
            }
            else if (strcaseeq("cacert", optarg))
            {
                request_ca_certificate = TRUE;
                if (filename)
                    file_out_ca_cert = filename;
            }
            else
            {
                usage("invalid --out file type");
            }
            continue;
        }

        case 'f':       /* --force */
            force = TRUE;
            continue;

        case 'T':       /* --httptimeout */
            http_timeout = atoi(optarg);
            if (http_timeout <= 0)
            {
                usage("invalid httptimeout specified");
            }
            continue;

        case '+':       /* --optionsfrom <filename> */
            if (!options->from(options, optarg, &argc, &argv, optind))
            {
                exit_scepclient("optionsfrom failed");
            }
            continue;

        case 'k':        /* --keylength <length> */
        {
            div_t q;

            rsa_keylength = atoi(optarg);
            if (rsa_keylength == 0)
                usage("invalid keylength");

            /* check if key length is a multiple of 8 bits */
            q = div(rsa_keylength, 2*BITS_PER_BYTE);
            if (q.rem != 0)
            {
                exit_scepclient("keylength is not a multiple of %d bits!"
                                , 2*BITS_PER_BYTE);
            }
            continue;
        }

        case 'D':       /* --days */
            if (optarg == NULL || !isdigit(optarg[0]))
            {
                usage("missing number of days");
            }
            else
            {
                char *endptr;
                long days = strtol(optarg, &endptr, 0);

                if (*endptr != '\0' || endptr == optarg
                        || days <= 0)
                    usage("<days> must be a positive number");
                validity = 24*3600*days;
            }
            continue;

        case 'S':       /* --startdate */
            if (optarg == NULL || strlen(optarg) != 13 || optarg[12] != 'Z')
            {
                usage("date format must be YYMMDDHHMMSSZ");
            }
            else
            {
                chunk_t date = { optarg, 13 };
                notBefore = asn1_to_time(&date, ASN1_UTCTIME);
            }
            continue;

        case 'E':       /* --enddate */
            if (optarg == NULL || strlen(optarg) != 13 || optarg[12] != 'Z')
            {
                usage("date format must be YYMMDDHHMMSSZ");
            }
            else
            {
                chunk_t date = { optarg, 13 };
                notAfter = asn1_to_time(&date, ASN1_UTCTIME);
            }
            continue;

        case 'd':       /* --dn */
            if (distinguishedName)
            {
                usage("only one distinguished name allowed");
            }
            distinguishedName = optarg;
            continue;

        case 's':       /* --subjectAltName */
        {
            char *value = strstr(optarg, "=");

            if (value)
            {
                /* replace '=' by '\0' */
                *value = '\0';
                /* set pointer to start of value */
                value++;
            }

            if (strcaseeq("email", optarg) ||
                    strcaseeq("dns", optarg) ||
                    strcaseeq("ip", optarg))
            {
                subjectAltNames->insert_last(subjectAltNames,
                                             identification_create_from_string(value));
                continue;
            }
            else
            {
                usage("invalid --subjectAltName type");
                continue;
            }
        }

        case 'p':       /* --password */
            if (challengePassword.len > 0)
            {
                usage("only one challenge password allowed");
            }
            if (strcaseeq("%prompt", optarg))
            {
                printf("Challenge password: "******"challenge password could not be read");
                }
            }
            else
            {
                challengePassword.ptr = optarg;
                challengePassword.len = strlen(optarg);
            }
            continue;

        case 'u':       /* -- url */
            if (scep_url)
            {
                usage("only one URL argument allowed");
            }
            scep_url = optarg;
            continue;

        case 'c':       /* -- caname */
            ca_name = optarg;
            continue;

        case 'm':       /* --method */
            if (strcaseeq("get", optarg))
            {
                http_get_request = TRUE;
            }
            else if (strcaseeq("post", optarg))
            {
                http_get_request = FALSE;
            }
            else
            {
                usage("invalid http request method specified");
            }
            continue;

        case 't':       /* --interval */
            poll_interval = atoi(optarg);
            if (poll_interval <= 0)
            {
                usage("invalid interval specified");
            }
            continue;

        case 'x':       /* --maxpolltime */
            max_poll_time = atoi(optarg);
            continue;

        case 'a':       /*--algorithm [<type>=]algo */
        {
            const proposal_token_t *token;
            char *type = optarg;
            char *algo = strstr(optarg, "=");

            if (algo)
            {
                *algo = '\0';
                algo++;
            }
            else
            {
                type = "enc";
                algo = optarg;
            }

            if (strcaseeq("enc", type))
            {
                token = lib->proposal->get_token(lib->proposal, algo);
                if (token == NULL || token->type != ENCRYPTION_ALGORITHM)
                {
                    usage("invalid algorithm specified");
                }
                pkcs7_symmetric_cipher = token->algorithm;
                pkcs7_key_size = token->keysize;
                if (encryption_algorithm_to_oid(token->algorithm,
                                                token->keysize) == OID_UNKNOWN)
                {
                    usage("unsupported encryption algorithm specified");
                }
            }
            else if (strcaseeq("dgst", type) ||
                     strcaseeq("sig", type))
            {
                hash_algorithm_t hash;

                token = lib->proposal->get_token(lib->proposal, algo);
                if (token == NULL || token->type != INTEGRITY_ALGORITHM)
                {
                    usage("invalid algorithm specified");
                }
                hash = hasher_algorithm_from_integrity(token->algorithm,
                                                       NULL);
                if (hash == OID_UNKNOWN)
                {
                    usage("invalid algorithm specified");
                }
                if (strcaseeq("dgst", type))
                {
                    pkcs7_digest_alg = hash;
                }
                else
                {
                    pkcs10_signature_alg = hash;
                }
            }
            else
            {
                usage("invalid --algorithm type");
            }
            continue;
        }
        default:
            usage("unknown option");
        }
        /* break from loop */
        break;
    }

    init_log("scepclient");

    /* load plugins, further infrastructure may need it */
    if (!lib->plugins->load(lib->plugins, NULL,
                            lib->settings->get_str(lib->settings, "scepclient.load", PLUGINS)))
    {
        exit_scepclient("plugin loading failed");
    }
    DBG1(DBG_APP, "  loaded plugins: %s",
         lib->plugins->loaded_plugins(lib->plugins));

    if ((filetype_out == 0) && (!request_ca_certificate))
    {
        usage("--out filetype required");
    }
    if (request_ca_certificate && (filetype_out > 0 || filetype_in > 0))
    {
        usage("in CA certificate request, no other --in or --out option allowed");
    }

    /* check if url is given, if cert output defined */
    if (((filetype_out & CERT) || request_ca_certificate) && !scep_url)
    {
        usage("URL of SCEP server required");
    }

    /* check for sanity of --in/--out */
    if (!filetype_in && (filetype_in > filetype_out))
    {
        usage("cannot generate --out of given --in!");
    }

    /* get CA cert */
    if (request_ca_certificate)
    {
        char ca_path[PATH_MAX];
        container_t *container;
        pkcs7_t *pkcs7;

        if (!scep_http_request(scep_url, chunk_create(ca_name, strlen(ca_name)),
                               SCEP_GET_CA_CERT, http_get_request,
                               http_timeout, &scep_response))
        {
            exit_scepclient("did not receive a valid scep response");
        }

        join_paths(ca_path, sizeof(ca_path), CA_CERT_PATH, file_out_ca_cert);

        pkcs7 = lib->creds->create(lib->creds, CRED_CONTAINER, CONTAINER_PKCS7,
                                   BUILD_BLOB_ASN1_DER, scep_response, BUILD_END);

        if (!pkcs7)
        {   /* no PKCS#7 encoded CA+RA certificates, assume simple CA cert */

            DBG1(DBG_APP, "unable to parse PKCS#7, assuming plain CA cert");
            if (!chunk_write(scep_response, ca_path, "ca cert",  0022, force))
            {
                exit_scepclient("could not write ca cert file '%s'", ca_path);
            }
        }
        else
        {
            enumerator_t *enumerator;
            certificate_t *cert;
            int ra_certs = 0, ca_certs = 0;
            int ra_index = 1, ca_index = 1;

            enumerator = pkcs7->create_cert_enumerator(pkcs7);
            while (enumerator->enumerate(enumerator, &cert))
            {
                x509_t *x509 = (x509_t*)cert;
                if (x509->get_flags(x509) & X509_CA)
                {
                    ca_certs++;
                }
                else
                {
                    ra_certs++;
                }
            }
            enumerator->destroy(enumerator);

            enumerator = pkcs7->create_cert_enumerator(pkcs7);
            while (enumerator->enumerate(enumerator, &cert))
            {
                x509_t *x509 = (x509_t*)cert;
                bool ca_cert = x509->get_flags(x509) & X509_CA;
                char cert_path[PATH_MAX], *path = ca_path;

                if (ca_cert && ca_certs > 1)
                {
                    add_path_suffix(cert_path, sizeof(cert_path), ca_path,
                                    "-%.1d", ca_index++);
                    path = cert_path;
                }
                else if (!ca_cert)
                {   /* use CA name as base for RA certs */
                    if (ra_certs > 1)
                    {
                        add_path_suffix(cert_path, sizeof(cert_path), ca_path,
                                        "-ra-%.1d", ra_index++);
                    }
                    else
                    {
                        add_path_suffix(cert_path, sizeof(cert_path), ca_path,
                                        "-ra");
                    }
                    path = cert_path;
                }

                if (!cert->get_encoding(cert, CERT_ASN1_DER, &encoding) ||
                        !chunk_write(encoding, path,
                                     ca_cert ? "ca cert" : "ra cert", 0022, force))
                {
                    exit_scepclient("could not write cert file '%s'", path);
                }
                chunk_free(&encoding);
            }
            enumerator->destroy(enumerator);
            container = &pkcs7->container;
            container->destroy(container);
        }
        exit_scepclient(NULL); /* no further output required */
    }

    creds = mem_cred_create();
    lib->credmgr->add_set(lib->credmgr, &creds->set);

    /*
     * input of PKCS#1 file
     */
    if (filetype_in & PKCS1)    /* load an RSA key pair from file */
    {
        char path[PATH_MAX];

        join_paths(path, sizeof(path), PRIVATE_KEY_PATH, file_in_pkcs1);

        private_key = lib->creds->create(lib->creds, CRED_PRIVATE_KEY, KEY_RSA,
                                         BUILD_FROM_FILE, path, BUILD_END);
    }
    else                                /* generate an RSA key pair */
    {
        private_key = lib->creds->create(lib->creds, CRED_PRIVATE_KEY, KEY_RSA,
                                         BUILD_KEY_SIZE, rsa_keylength,
                                         BUILD_END);
    }
    if (private_key == NULL)
    {
        exit_scepclient("no RSA private key available");
    }
    creds->add_key(creds, private_key->get_ref(private_key));
    public_key = private_key->get_public_key(private_key);

    /* check for minimum key length */
    if (private_key->get_keysize(private_key) < RSA_MIN_OCTETS / BITS_PER_BYTE)
    {
        exit_scepclient("length of RSA key has to be at least %d bits",
                        RSA_MIN_OCTETS * BITS_PER_BYTE);
    }

    /*
     * input of PKCS#10 file
     */
    if (filetype_in & PKCS10)
    {
        char path[PATH_MAX];

        join_paths(path, sizeof(path), REQ_PATH, file_in_pkcs10);

        pkcs10_req = lib->creds->create(lib->creds, CRED_CERTIFICATE,
                                        CERT_PKCS10_REQUEST, BUILD_FROM_FILE,
                                        path, BUILD_END);
        if (!pkcs10_req)
        {
            exit_scepclient("could not read certificate request '%s'", path);
        }
        subject = pkcs10_req->get_subject(pkcs10_req);
        subject = subject->clone(subject);
    }
    else
    {
        if (distinguishedName == NULL)
        {
            char buf[BUF_LEN];
            int n = sprintf(buf, DEFAULT_DN);

            /* set the common name to the hostname */
            if (gethostname(buf + n, BUF_LEN - n) || strlen(buf) == n)
            {
                exit_scepclient("no hostname defined, use "
                                "--dn <distinguished name> option");
            }
            distinguishedName = buf;
        }

        DBG2(DBG_APP, "dn: '%s'", distinguishedName);
        subject = identification_create_from_string(distinguishedName);
        if (subject->get_type(subject) != ID_DER_ASN1_DN)
        {
            exit_scepclient("parsing of distinguished name failed");
        }

        DBG2(DBG_APP, "building pkcs10 object:");
        pkcs10_req = lib->creds->create(lib->creds, CRED_CERTIFICATE,
                                        CERT_PKCS10_REQUEST,
                                        BUILD_SIGNING_KEY, private_key,
                                        BUILD_SUBJECT, subject,
                                        BUILD_SUBJECT_ALTNAMES, subjectAltNames,
                                        BUILD_CHALLENGE_PWD, challengePassword,
                                        BUILD_DIGEST_ALG, pkcs10_signature_alg,
                                        BUILD_END);
        if (!pkcs10_req)
        {
            exit_scepclient("generating pkcs10 request failed");
        }
    }
    pkcs10_req->get_encoding(pkcs10_req, CERT_ASN1_DER, &pkcs10_encoding);
    fingerprint = scep_generate_pkcs10_fingerprint(pkcs10_encoding);
    DBG1(DBG_APP, "  fingerprint:    %s", fingerprint.ptr);

    /*
     * output of PKCS#10 file
     */
    if (filetype_out & PKCS10)
    {
        char path[PATH_MAX];

        join_paths(path, sizeof(path), REQ_PATH, file_out_pkcs10);

        if (!chunk_write(pkcs10_encoding, path, "pkcs10",  0022, force))
        {
            exit_scepclient("could not write pkcs10 file '%s'", path);
        }
        filetype_out &= ~PKCS10;   /* delete PKCS10 flag */
    }

    if (!filetype_out)
    {
        exit_scepclient(NULL); /* no further output required */
    }

    /*
     * output of PKCS#1 file
     */
    if (filetype_out & PKCS1)
    {
        char path[PATH_MAX];

        join_paths(path, sizeof(path), PRIVATE_KEY_PATH, file_out_pkcs1);

        DBG2(DBG_APP, "building pkcs1 object:");
        if (!private_key->get_encoding(private_key, PRIVKEY_ASN1_DER, &pkcs1) ||
                !chunk_write(pkcs1, path, "pkcs1", 0066, force))
        {
            exit_scepclient("could not write pkcs1 file '%s'", path);
        }
        filetype_out &= ~PKCS1;   /* delete PKCS1 flag */
    }

    if (!filetype_out)
    {
        exit_scepclient(NULL); /* no further output required */
    }

    scep_generate_transaction_id(public_key, &transID, &serialNumber);
    DBG1(DBG_APP, "  transaction ID: %.*s", (int)transID.len, transID.ptr);

    /*
     * read or generate self-signed X.509 certificate
     */
    if (filetype_in & CERT_SELF)
    {
        char path[PATH_MAX];

        join_paths(path, sizeof(path), HOST_CERT_PATH, file_in_cert_self);

        x509_signer = lib->creds->create(lib->creds, CRED_CERTIFICATE, CERT_X509,
                                         BUILD_FROM_FILE, path, BUILD_END);
        if (!x509_signer)
        {
            exit_scepclient("could not read certificate file '%s'", path);
        }
    }
    else
    {
        notBefore = notBefore ? notBefore : time(NULL);
        notAfter  = notAfter  ? notAfter  : (notBefore + validity);
        x509_signer = lib->creds->create(lib->creds, CRED_CERTIFICATE, CERT_X509,
                                         BUILD_SIGNING_KEY, private_key,
                                         BUILD_PUBLIC_KEY, public_key,
                                         BUILD_SUBJECT, subject,
                                         BUILD_NOT_BEFORE_TIME, notBefore,
                                         BUILD_NOT_AFTER_TIME, notAfter,
                                         BUILD_SERIAL, serialNumber,
                                         BUILD_SUBJECT_ALTNAMES, subjectAltNames,
                                         BUILD_END);
        if (!x509_signer)
        {
            exit_scepclient("generating certificate failed");
        }
    }
    creds->add_cert(creds, TRUE, x509_signer->get_ref(x509_signer));

    /*
     * output of self-signed X.509 certificate file
     */
    if (filetype_out & CERT_SELF)
    {
        char path[PATH_MAX];

        join_paths(path, sizeof(path), HOST_CERT_PATH, file_out_cert_self);

        if (!x509_signer->get_encoding(x509_signer, CERT_ASN1_DER, &encoding))
        {
            exit_scepclient("encoding certificate failed");
        }
        if (!chunk_write(encoding, path, "self-signed cert", 0022, force))
        {
            exit_scepclient("could not write self-signed cert file '%s'", path);
        }
        chunk_free(&encoding);
        filetype_out &= ~CERT_SELF;   /* delete CERT_SELF flag */
    }

    if (!filetype_out)
    {
        exit_scepclient(NULL); /* no further output required */
    }

    /*
     * load ca encryption certificate
     */
    {
        char path[PATH_MAX];

        join_paths(path, sizeof(path), CA_CERT_PATH, file_in_cacert_enc);

        x509_ca_enc = lib->creds->create(lib->creds, CRED_CERTIFICATE, CERT_X509,
                                         BUILD_FROM_FILE, path, BUILD_END);
        if (!x509_ca_enc)
        {
            exit_scepclient("could not load encryption cacert file '%s'", path);
        }
    }

    /*
     * input of PKCS#7 file
     */
    if (filetype_in & PKCS7)
    {
        /* user wants to load a pkcs7 encrypted request
         * operation is not yet supported!
         * would require additional parsing of transaction-id

           pkcs7 = pkcs7_read_from_file(file_in_pkcs7);

         */
    }
    else
    {
        DBG2(DBG_APP, "building pkcs7 request");
        pkcs7 = scep_build_request(pkcs10_encoding,
                                   transID, SCEP_PKCSReq_MSG, x509_ca_enc,
                                   pkcs7_symmetric_cipher, pkcs7_key_size,
                                   x509_signer, pkcs7_digest_alg, private_key);
        if (!pkcs7.ptr)
        {
            exit_scepclient("failed to build pkcs7 request");
        }
    }

    /*
     * output pkcs7 encrypted and signed certificate request
     */
    if (filetype_out & PKCS7)
    {
        char path[PATH_MAX];

        join_paths(path, sizeof(path), REQ_PATH, file_out_pkcs7);

        if (!chunk_write(pkcs7, path, "pkcs7 encrypted request", 0022, force))
        {
            exit_scepclient("could not write pkcs7 file '%s'", path);
        }
        filetype_out &= ~PKCS7;   /* delete PKCS7 flag */
    }

    if (!filetype_out)
    {
        exit_scepclient(NULL); /* no further output required */
    }

    /*
     * output certificate fetch from SCEP server
     */
    if (filetype_out & CERT)
    {
        bool stored = FALSE;
        certificate_t *cert;
        enumerator_t  *enumerator;
        char path[PATH_MAX];
        time_t poll_start = 0;
        pkcs7_t *p7;
        container_t *container = NULL;
        chunk_t chunk;
        scep_attributes_t attrs = empty_scep_attributes;

        join_paths(path, sizeof(path), CA_CERT_PATH, file_in_cacert_sig);

        x509_ca_sig = lib->creds->create(lib->creds, CRED_CERTIFICATE, CERT_X509,
                                         BUILD_FROM_FILE, path, BUILD_END);
        if (!x509_ca_sig)
        {
            exit_scepclient("could not load signature cacert file '%s'", path);
        }

        creds->add_cert(creds, TRUE, x509_ca_sig->get_ref(x509_ca_sig));

        if (!scep_http_request(scep_url, pkcs7, SCEP_PKI_OPERATION,
                               http_get_request, http_timeout, &scep_response))
        {
            exit_scepclient("did not receive a valid scep response");
        }
        ugh = scep_parse_response(scep_response, transID, &container, &attrs);
        if (ugh != NULL)
        {
            exit_scepclient(ugh);
        }

        /* in case of manual mode, we are going into a polling loop */
        if (attrs.pkiStatus == SCEP_PENDING)
        {
            identification_t *issuer = x509_ca_sig->get_subject(x509_ca_sig);

            DBG1(DBG_APP, "  scep request pending, polling every %d seconds",
                 poll_interval);
            poll_start = time_monotonic(NULL);
            issuerAndSubject = asn1_wrap(ASN1_SEQUENCE, "cc",
                                         issuer->get_encoding(issuer),
                                         subject);
        }
        while (attrs.pkiStatus == SCEP_PENDING)
        {
            if (max_poll_time > 0 &&
                    (time_monotonic(NULL) - poll_start >= max_poll_time))
            {
                exit_scepclient("maximum poll time reached: %d seconds"
                                , max_poll_time);
            }
            DBG2(DBG_APP, "going to sleep for %d seconds", poll_interval);
            sleep(poll_interval);
            free(scep_response.ptr);
            container->destroy(container);

            DBG2(DBG_APP, "fingerprint:    %.*s",
                 (int)fingerprint.len, fingerprint.ptr);
            DBG2(DBG_APP, "transaction ID: %.*s",
                 (int)transID.len, transID.ptr);

            chunk_free(&getCertInitial);
            getCertInitial = scep_build_request(issuerAndSubject,
                                                transID, SCEP_GetCertInitial_MSG, x509_ca_enc,
                                                pkcs7_symmetric_cipher, pkcs7_key_size,
                                                x509_signer, pkcs7_digest_alg, private_key);
            if (!getCertInitial.ptr)
            {
                exit_scepclient("failed to build scep request");
            }
            if (!scep_http_request(scep_url, getCertInitial, SCEP_PKI_OPERATION,
                                   http_get_request, http_timeout, &scep_response))
            {
                exit_scepclient("did not receive a valid scep response");
            }
            ugh = scep_parse_response(scep_response, transID, &container, &attrs);
            if (ugh != NULL)
            {
                exit_scepclient(ugh);
            }
        }

        if (attrs.pkiStatus != SCEP_SUCCESS)
        {
            container->destroy(container);
            exit_scepclient("reply status is not 'SUCCESS'");
        }

        if (!container->get_data(container, &chunk))
        {
            container->destroy(container);
            exit_scepclient("extracting signed-data failed");
        }
        container->destroy(container);

        /* decrypt enveloped-data container */
        container = lib->creds->create(lib->creds,
                                       CRED_CONTAINER, CONTAINER_PKCS7,
                                       BUILD_BLOB_ASN1_DER, chunk,
                                       BUILD_END);
        free(chunk.ptr);
        if (!container)
        {
            exit_scepclient("could not decrypt envelopedData");
        }

        if (!container->get_data(container, &chunk))
        {
            container->destroy(container);
            exit_scepclient("extracting encrypted-data failed");
        }
        container->destroy(container);

        /* parse signed-data container */
        container = lib->creds->create(lib->creds,
                                       CRED_CONTAINER, CONTAINER_PKCS7,
                                       BUILD_BLOB_ASN1_DER, chunk,
                                       BUILD_END);
        free(chunk.ptr);
        if (!container)
        {
            exit_scepclient("could not parse singed-data");
        }
        /* no need to verify the signed-data container, the signature does NOT
         * cover the contained certificates */

        /* store the end entity certificate */
        join_paths(path, sizeof(path), HOST_CERT_PATH, file_out_cert);

        p7 = (pkcs7_t*)container;
        enumerator = p7->create_cert_enumerator(p7);
        while (enumerator->enumerate(enumerator, &cert))
        {
            x509_t *x509 = (x509_t*)cert;

            if (!(x509->get_flags(x509) & X509_CA))
            {
                if (stored)
                {
                    exit_scepclient("multiple certs received, only first stored");
                }
                if (!cert->get_encoding(cert, CERT_ASN1_DER, &encoding) ||
                        !chunk_write(encoding, path, "requested cert", 0022, force))
                {
                    exit_scepclient("could not write cert file '%s'", path);
                }
                chunk_free(&encoding);
                stored = TRUE;
            }
        }
        enumerator->destroy(enumerator);
        container->destroy(container);
        chunk_free(&attrs.transID);
        chunk_free(&attrs.senderNonce);
        chunk_free(&attrs.recipientNonce);

        filetype_out &= ~CERT;   /* delete CERT flag */
    }

    exit_scepclient(NULL);
    return -1; /* should never be reached */
}
예제 #4
0
/**
 * @brief prints the program version and exits
 *
 */
static void
version(void)
{
	printf("scepclient %s\n", scepclient_version);
	exit_scepclient(NULL);
}
예제 #5
0
/**
 * @brief prints the usage of the program to the stderr output
 *
 * If message is set, program is exitet with 1 (error)
 * @param message message in case of an error
 */
static void usage(const char *message)
{
    fprintf(stderr,
            "Usage: scepclient\n"
            " --help (-h)                       show usage and exit\n"
            " --version (-v)                    show version and exit\n"
            " --quiet (-q)                      do not write log output to stderr\n"
            " --in (-i) <type>[=<filename>]     use <filename> of <type> for input\n"
            "                                   <type> = pkcs1 | pkcs10 | cert-self\n"
            "                                            cacert-enc | cacert-sig\n"
            "                                   - if no pkcs1 input is defined, an RSA\n"
            "                                     key will be generated\n"
            "                                   - if no pkcs10 input is defined, a\n"
            "                                     PKCS#10 request will be generated\n"
            "                                   - if no cert-self input is defined, a\n"
            "                                     self-signed certificate will be generated\n"
            "                                   - if no filename is given, default is used\n"
            " --out (-o) <type>[=<filename>]    write output of <type> to <filename>\n"
            "                                   multiple outputs are allowed\n"
            "                                   <type> = pkcs1 | pkcs10 | pkcs7 | cert-self |\n"
            "                                            cert | cacert\n"
            "                                   - type cacert defines filename prefix of\n"
            "                                     received CA certificate(s)\n"
            "                                   - if no filename is given, default is used\n"
            " --optionsfrom (-+) <filename>     reads additional options from given file\n"
            " --force (-f)                      force existing file(s)\n"
            " --httptimeout (-T)                timeout for HTTP operations (default: 30s)\n"
            "\n"
            "Options for key generation (pkcs1):\n"
            " --keylength (-k) <bits>           key length for RSA key generation\n"
            "                                   (default: 2048 bits)\n"
            "\n"
            "Options for validity:\n"
            " --days (-D) <days>                validity in days\n"
            " --startdate (-S) <YYMMDDHHMMSS>Z  not valid before date\n"
            " --enddate   (-E) <YYMMDDHHMMSS>Z  not valid after date\n"
            "\n"
            "Options for request generation (pkcs10):\n"
            " --dn (-d) <dn>                    comma separated list of distinguished names\n"
            " --subjectAltName (-s) <t>=<v>     include subjectAltName in certificate request\n"
            "                                   <t> =  email | dns | ip \n"
            " --password (-p) <pw>              challenge password\n"
            "                                   - use '%%prompt' as pw for a password prompt\n"
            " --algorithm (-a) [<type>=]<algo>  algorithm to be used for PKCS#7 encryption,\n"
            "                                   PKCS#7 digest or PKCS#10 signature\n"
            "                                   <type> = enc | dgst | sig\n"
            "                                   - if no type is given enc is assumed\n"
            "                                   <algo> = des (default) | 3des | aes128 |\n"
            "                                            aes192 | aes256 | camellia128 |\n"
            "                                            camellia192 | camellia256\n"
            "                                   <algo> = md5 (default) | sha1 | sha256 |\n"
            "                                            sha384 | sha512\n"
            "\n"
            "Options for CA certificate acquisition:\n"
            " --caname (-c) <name>              name of CA to fetch CA certificate(s)\n"
            "                                   (default: CAIdentifier)\n"
            "Options for enrollment (cert):\n"
            " --url (-u) <url>                  url of the SCEP server\n"
            " --method (-m) post | get          http request type\n"
            " --interval (-t) <seconds>         poll interval in seconds (default 20s)\n"
            " --maxpolltime (-x) <seconds>      max poll time in seconds when in manual mode\n"
            "                                   (default: unlimited)\n"
            "\n"
            "Debugging output:\n"
            " --debug (-l) <level>              changes the log level (-1..4, default: 1)\n"
           );
    exit_scepclient(message);
}