ntp-keygen.mdoc.in revision 316068
1316068Sdelphij.Dd March 21 2017 2275970Scy.Dt NTP_KEYGEN @NTP_KEYGEN_MS@ User Commands 3275970Scy.Os 4275970Scy.\" EDIT THIS FILE WITH CAUTION (ntp-keygen-opts.mdoc) 5275970Scy.\" 6316068Sdelphij.\" It has been AutoGen-ed March 21, 2017 at 10:45:59 AM by AutoGen 5.18.5 7275970Scy.\" From the definitions ntp-keygen-opts.def 8275970Scy.\" and the template file agmdoc-cmd.tpl 9275970Scy.Sh NAME 10275970Scy.Nm ntp-keygen 11275970Scy.Nd Create a NTP host key 12275970Scy.Sh SYNOPSIS 13275970Scy.Nm 14275970Scy.\" Mixture of short (flag) options and long options 15275970Scy.Op Fl flags 16275970Scy.Op Fl flag Op Ar value 17275970Scy.Op Fl \-option\-name Ns Oo Oo Ns "=| " Oc Ns Ar value Oc 18275970Scy.Pp 19275970ScyAll arguments must be options. 20275970Scy.Pp 21275970Scy.Sh DESCRIPTION 22275970ScyThis program generates cryptographic data files used by the NTPv4 23275970Scyauthentication and identification schemes. 24275970ScyIt generates MD5 key files used in symmetric key cryptography. 25275970ScyIn addition, if the OpenSSL software library has been installed, 26275970Scyit generates keys, certificate and identity files used in public key 27275970Scycryptography. 28275970ScyThese files are used for cookie encryption, 29275970Scydigital signature and challenge/response identification algorithms 30275970Scycompatible with the Internet standard security infrastructure. 31275970Scy.Pp 32275970ScyAll files are in PEM\-encoded printable ASCII format, 33275970Scyso they can be embedded as MIME attachments in mail to other sites 34275970Scyand certificate authorities. 35275970ScyBy default, files are not encrypted. 36275970Scy.Pp 37275970ScyWhen used to generate message digest keys, the program produces a file 38275970Scycontaining ten pseudo\-random printable ASCII strings suitable for the 39275970ScyMD5 message digest algorithm included in the distribution. 40275970ScyIf the OpenSSL library is installed, it produces an additional ten 41275970Scyhex\-encoded random bit strings suitable for the SHA1 and other message 42275970Scydigest algorithms. 43275970ScyThe message digest keys file must be distributed and stored 44275970Scyusing secure means beyond the scope of NTP itself. 45275970ScyBesides the keys used for ordinary NTP associations, additional keys 46275970Scycan be defined as passwords for the 47275970Scy.Xr ntpq @NTPQ_MS@ 48275970Scyand 49275970Scy.Xr ntpdc @NTPDC_MS@ 50275970Scyutility programs. 51275970Scy.Pp 52275970ScyThe remaining generated files are compatible with other OpenSSL 53275970Scyapplications and other Public Key Infrastructure (PKI) resources. 54275970ScyCertificates generated by this program are compatible with extant 55275970Scyindustry practice, although some users might find the interpretation of 56275970ScyX509v3 extension fields somewhat liberal. 57275970ScyHowever, the identity keys are probably not compatible with anything 58275970Scyother than Autokey. 59275970Scy.Pp 60275970ScySome files used by this program are encrypted using a private password. 61275970ScyThe 62275970Scy.Fl p 63275970Scyoption specifies the password for local encrypted files and the 64275970Scy.Fl q 65275970Scyoption the password for encrypted files sent to remote sites. 66275970ScyIf no password is specified, the host name returned by the Unix 67275970Scy.Fn gethostname 68275970Scyfunction, normally the DNS name of the host is used. 69275970Scy.Pp 70275970ScyThe 71275970Scy.Ar pw 72275970Scyoption of the 73275970Scy.Ar crypto 74275970Scyconfiguration command specifies the read 75275970Scypassword for previously encrypted local files. 76275970ScyThis must match the local password used by this program. 77275970ScyIf not specified, the host name is used. 78275970ScyThus, if files are generated by this program without password, 79275970Scythey can be read back by 80275970Scy.Ar ntpd 81275970Scywithout password but only on the same host. 82275970Scy.Pp 83275970ScyNormally, encrypted files for each host are generated by that host and 84275970Scyused only by that host, although exceptions exist as noted later on 85275970Scythis page. 86275970ScyThe symmetric keys file, normally called 87275970Scy.Ar ntp.keys , 88275970Scyis usually installed in 89275970Scy.Pa /etc . 90275970ScyOther files and links are usually installed in 91275970Scy.Pa /usr/local/etc , 92275970Scywhich is normally in a shared filesystem in 93275970ScyNFS\-mounted networks and cannot be changed by shared clients. 94275970ScyThe location of the keys directory can be changed by the 95275970Scy.Ar keysdir 96275970Scyconfiguration command in such cases. 97275970ScyNormally, this is in 98275970Scy.Pa /etc . 99275970Scy.Pp 100275970ScyThis program directs commentary and error messages to the standard 101275970Scyerror stream 102275970Scy.Ar stderr 103275970Scyand remote files to the standard output stream 104275970Scy.Ar stdout 105275970Scywhere they can be piped to other applications or redirected to files. 106275970ScyThe names used for generated files and links all begin with the 107275970Scystring 108275970Scy.Ar ntpkey 109275970Scyand include the file type, generating host and filestamp, 110275970Scyas described in the 111275970Scy.Dq Cryptographic Data Files 112275970Scysection below. 113275970Scy.Ss Running the Program 114275970ScyTo test and gain experience with Autokey concepts, log in as root and 115275970Scychange to the keys directory, usually 116275970Scy.Pa /usr/local/etc 117275970ScyWhen run for the first time, or if all files with names beginning with 118275970Scy.Ar ntpkey 119275970Scyhave been removed, use the 120275970Scy.Nm 121275970Scycommand without arguments to generate a 122275970Scydefault RSA host key and matching RSA\-MD5 certificate with expiration 123275970Scydate one year hence. 124275970ScyIf run again without options, the program uses the 125275970Scyexisting keys and parameters and generates only a new certificate with 126275970Scynew expiration date one year hence. 127275970Scy.Pp 128275970ScyRun the command on as many hosts as necessary. 129275970ScyDesignate one of them as the trusted host (TH) using 130275970Scy.Nm 131275970Scywith the 132275970Scy.Fl T 133275970Scyoption and configure it to synchronize from reliable Internet servers. 134275970ScyThen configure the other hosts to synchronize to the TH directly or 135275970Scyindirectly. 136275970ScyA certificate trail is created when Autokey asks the immediately 137275970Scyascendant host towards the TH to sign its certificate, which is then 138275970Scyprovided to the immediately descendant host on request. 139275970ScyAll group hosts should have acyclic certificate trails ending on the TH. 140275970Scy.Pp 141275970ScyThe host key is used to encrypt the cookie when required and so must be 142275970ScyRSA type. 143275970ScyBy default, the host key is also the sign key used to encrypt 144275970Scysignatures. 145275970ScyA different sign key can be assigned using the 146275970Scy.Fl S 147275970Scyoption and this can be either RSA or DSA type. 148275970ScyBy default, the signature 149275970Scymessage digest type is MD5, but any combination of sign key type and 150275970Scymessage digest type supported by the OpenSSL library can be specified 151275970Scyusing the 152275970Scy.Fl c 153275970Scyoption. 154275970ScyThe rules say cryptographic media should be generated with proventic 155275970Scyfilestamps, which means the host should already be synchronized before 156275970Scythis program is run. 157275970ScyThis of course creates a chicken\-and\-egg problem 158275970Scywhen the host is started for the first time. 159275970ScyAccordingly, the host time 160275970Scyshould be set by some other means, such as eyeball\-and\-wristwatch, at 161275970Scyleast so that the certificate lifetime is within the current year. 162275970ScyAfter that and when the host is synchronized to a proventic source, the 163275970Scycertificate should be re\-generated. 164275970Scy.Pp 165275970ScyAdditional information on trusted groups and identity schemes is on the 166275970Scy.Dq Autokey Public\-Key Authentication 167275970Scypage. 168275970Scy.Pp 169275970ScyThe 170275970Scy.Xr ntpd @NTPD_MS@ 171275970Scyconfiguration command 172275970Scy.Ic crypto pw Ar password 173275970Scyspecifies the read password for previously encrypted files. 174275970ScyThe daemon expires on the spot if the password is missing 175275970Scyor incorrect. 176275970ScyFor convenience, if a file has been previously encrypted, 177275970Scythe default read password is the name of the host running 178275970Scythe program. 179275970ScyIf the previous write password is specified as the host name, 180275970Scythese files can be read by that host with no explicit password. 181275970Scy.Pp 182275970ScyFile names begin with the prefix 183275970Scy.Cm ntpkey_ 184275970Scyand end with the postfix 185275970Scy.Ar _hostname.filestamp , 186275970Scywhere 187275970Scy.Ar hostname 188275970Scyis the owner name, usually the string returned 189275970Scyby the Unix gethostname() routine, and 190275970Scy.Ar filestamp 191275970Scyis the NTP seconds when the file was generated, in decimal digits. 192275970ScyThis both guarantees uniqueness and simplifies maintenance 193275970Scyprocedures, since all files can be quickly removed 194275970Scyby a 195275970Scy.Ic rm ntpkey\&* 196275970Scycommand or all files generated 197275970Scyat a specific time can be removed by a 198275970Scy.Ic rm 199275970Scy.Ar \&*filestamp 200275970Scycommand. 201275970ScyTo further reduce the risk of misconfiguration, 202275970Scythe first two lines of a file contain the file name 203275970Scyand generation date and time as comments. 204275970Scy.Pp 205275970ScyAll files are installed by default in the keys directory 206275970Scy.Pa /usr/local/etc , 207275970Scywhich is normally in a shared filesystem 208275970Scyin NFS\-mounted networks. 209275970ScyThe actual location of the keys directory 210275970Scyand each file can be overridden by configuration commands, 211275970Scybut this is not recommended. 212275970ScyNormally, the files for each host are generated by that host 213275970Scyand used only by that host, although exceptions exist 214275970Scyas noted later on this page. 215275970Scy.Pp 216275970ScyNormally, files containing private values, 217275970Scyincluding the host key, sign key and identification parameters, 218275970Scyare permitted root read/write\-only; 219275970Scywhile others containing public values are permitted world readable. 220275970ScyAlternatively, files containing private values can be encrypted 221275970Scyand these files permitted world readable, 222275970Scywhich simplifies maintenance in shared file systems. 223275970ScySince uniqueness is insured by the hostname and 224275970Scyfile name extensions, the files for a NFS server and 225275970Scydependent clients can all be installed in the same shared directory. 226275970Scy.Pp 227275970ScyThe recommended practice is to keep the file name extensions 228275970Scywhen installing a file and to install a soft link 229275970Scyfrom the generic names specified elsewhere on this page 230275970Scyto the generated files. 231275970ScyThis allows new file generations to be activated simply 232275970Scyby changing the link. 233275970ScyIf a link is present, ntpd follows it to the file name 234275970Scyto extract the filestamp. 235275970ScyIf a link is not present, 236275970Scy.Xr ntpd @NTPD_MS@ 237275970Scyextracts the filestamp from the file itself. 238275970ScyThis allows clients to verify that the file and generation times 239275970Scyare always current. 240275970ScyThe 241275970Scy.Nm 242275970Scyprogram uses the same timestamp extension for all files generated 243275970Scyat one time, so each generation is distinct and can be readily 244275970Scyrecognized in monitoring data. 245275970Scy.Ss Running the program 246275970ScyThe safest way to run the 247275970Scy.Nm 248275970Scyprogram is logged in directly as root. 249275970ScyThe recommended procedure is change to the keys directory, 250275970Scyusually 251275970Scy.Pa /usr/local/etc , 252275970Scythen run the program. 253275970ScyWhen run for the first time, 254275970Scyor if all 255275970Scy.Cm ntpkey 256275970Scyfiles have been removed, 257275970Scythe program generates a RSA host key file and matching RSA\-MD5 certificate file, 258275970Scywhich is all that is necessary in many cases. 259275970ScyThe program also generates soft links from the generic names 260275970Scyto the respective files. 261275970ScyIf run again, the program uses the same host key file, 262275970Scybut generates a new certificate file and link. 263275970Scy.Pp 264275970ScyThe host key is used to encrypt the cookie when required and so must be RSA type. 265275970ScyBy default, the host key is also the sign key used to encrypt signatures. 266275970ScyWhen necessary, a different sign key can be specified and this can be 267275970Scyeither RSA or DSA type. 268275970ScyBy default, the message digest type is MD5, but any combination 269275970Scyof sign key type and message digest type supported by the OpenSSL library 270275970Scycan be specified, including those using the MD2, MD5, SHA, SHA1, MDC2 271275970Scyand RIPE160 message digest algorithms. 272275970ScyHowever, the scheme specified in the certificate must be compatible 273275970Scywith the sign key. 274275970ScyCertificates using any digest algorithm are compatible with RSA sign keys; 275275970Scyhowever, only SHA and SHA1 certificates are compatible with DSA sign keys. 276275970Scy.Pp 277275970ScyPrivate/public key files and certificates are compatible with 278275970Scyother OpenSSL applications and very likely other libraries as well. 279275970ScyCertificates or certificate requests derived from them should be compatible 280275970Scywith extant industry practice, although some users might find 281275970Scythe interpretation of X509v3 extension fields somewhat liberal. 282275970ScyHowever, the identification parameter files, although encoded 283275970Scyas the other files, are probably not compatible with anything other than Autokey. 284275970Scy.Pp 285275970ScyRunning the program as other than root and using the Unix 286275970Scy.Ic su 287275970Scycommand 288275970Scyto assume root may not work properly, since by default the OpenSSL library 289275970Scylooks for the random seed file 290275970Scy.Cm .rnd 291275970Scyin the user home directory. 292275970ScyHowever, there should be only one 293275970Scy.Cm .rnd , 294275970Scymost conveniently 295275970Scyin the root directory, so it is convenient to define the 296275970Scy.Cm $RANDFILE 297275970Scyenvironment variable used by the OpenSSL library as the path to 298275970Scy.Cm /.rnd . 299275970Scy.Pp 300275970ScyInstalling the keys as root might not work in NFS\-mounted 301275970Scyshared file systems, as NFS clients may not be able to write 302275970Scyto the shared keys directory, even as root. 303275970ScyIn this case, NFS clients can specify the files in another 304275970Scydirectory such as 305275970Scy.Pa /etc 306275970Scyusing the 307275970Scy.Ic keysdir 308275970Scycommand. 309275970ScyThere is no need for one client to read the keys and certificates 310275970Scyof other clients or servers, as these data are obtained automatically 311275970Scyby the Autokey protocol. 312275970Scy.Pp 313275970ScyOrdinarily, cryptographic files are generated by the host that uses them, 314275970Scybut it is possible for a trusted agent (TA) to generate these files 315275970Scyfor other hosts; however, in such cases files should always be encrypted. 316275970ScyThe subject name and trusted name default to the hostname 317275970Scyof the host generating the files, but can be changed by command line options. 318275970ScyIt is convenient to designate the owner name and trusted name 319275970Scyas the subject and issuer fields, respectively, of the certificate. 320275970ScyThe owner name is also used for the host and sign key files, 321275970Scywhile the trusted name is used for the identity files. 322275970Scy.Pp 323275970ScyAll files are installed by default in the keys directory 324275970Scy.Pa /usr/local/etc , 325275970Scywhich is normally in a shared filesystem 326275970Scyin NFS\-mounted networks. 327275970ScyThe actual location of the keys directory 328275970Scyand each file can be overridden by configuration commands, 329275970Scybut this is not recommended. 330275970ScyNormally, the files for each host are generated by that host 331275970Scyand used only by that host, although exceptions exist 332275970Scyas noted later on this page. 333275970Scy.Pp 334275970ScyNormally, files containing private values, 335275970Scyincluding the host key, sign key and identification parameters, 336275970Scyare permitted root read/write\-only; 337275970Scywhile others containing public values are permitted world readable. 338275970ScyAlternatively, files containing private values can be encrypted 339275970Scyand these files permitted world readable, 340275970Scywhich simplifies maintenance in shared file systems. 341275970ScySince uniqueness is insured by the hostname and 342275970Scyfile name extensions, the files for a NFS server and 343275970Scydependent clients can all be installed in the same shared directory. 344275970Scy.Pp 345275970ScyThe recommended practice is to keep the file name extensions 346275970Scywhen installing a file and to install a soft link 347275970Scyfrom the generic names specified elsewhere on this page 348275970Scyto the generated files. 349275970ScyThis allows new file generations to be activated simply 350275970Scyby changing the link. 351275970ScyIf a link is present, ntpd follows it to the file name 352275970Scyto extract the filestamp. 353275970ScyIf a link is not present, 354275970Scy.Xr ntpd @NTPD_MS@ 355275970Scyextracts the filestamp from the file itself. 356275970ScyThis allows clients to verify that the file and generation times 357275970Scyare always current. 358275970ScyThe 359275970Scy.Nm 360275970Scyprogram uses the same timestamp extension for all files generated 361275970Scyat one time, so each generation is distinct and can be readily 362275970Scyrecognized in monitoring data. 363275970Scy.Ss Running the program 364275970ScyThe safest way to run the 365275970Scy.Nm 366275970Scyprogram is logged in directly as root. 367275970ScyThe recommended procedure is change to the keys directory, 368275970Scyusually 369275970Scy.Pa /usr/local/etc , 370275970Scythen run the program. 371275970ScyWhen run for the first time, 372275970Scyor if all 373275970Scy.Cm ntpkey 374275970Scyfiles have been removed, 375275970Scythe program generates a RSA host key file and matching RSA\-MD5 certificate file, 376275970Scywhich is all that is necessary in many cases. 377275970ScyThe program also generates soft links from the generic names 378275970Scyto the respective files. 379275970ScyIf run again, the program uses the same host key file, 380275970Scybut generates a new certificate file and link. 381275970Scy.Pp 382275970ScyThe host key is used to encrypt the cookie when required and so must be RSA type. 383275970ScyBy default, the host key is also the sign key used to encrypt signatures. 384275970ScyWhen necessary, a different sign key can be specified and this can be 385275970Scyeither RSA or DSA type. 386275970ScyBy default, the message digest type is MD5, but any combination 387275970Scyof sign key type and message digest type supported by the OpenSSL library 388275970Scycan be specified, including those using the MD2, MD5, SHA, SHA1, MDC2 389275970Scyand RIPE160 message digest algorithms. 390275970ScyHowever, the scheme specified in the certificate must be compatible 391275970Scywith the sign key. 392275970ScyCertificates using any digest algorithm are compatible with RSA sign keys; 393275970Scyhowever, only SHA and SHA1 certificates are compatible with DSA sign keys. 394275970Scy.Pp 395275970ScyPrivate/public key files and certificates are compatible with 396275970Scyother OpenSSL applications and very likely other libraries as well. 397275970ScyCertificates or certificate requests derived from them should be compatible 398275970Scywith extant industry practice, although some users might find 399275970Scythe interpretation of X509v3 extension fields somewhat liberal. 400275970ScyHowever, the identification parameter files, although encoded 401275970Scyas the other files, are probably not compatible with anything other than Autokey. 402275970Scy.Pp 403275970ScyRunning the program as other than root and using the Unix 404275970Scy.Ic su 405275970Scycommand 406275970Scyto assume root may not work properly, since by default the OpenSSL library 407275970Scylooks for the random seed file 408275970Scy.Cm .rnd 409275970Scyin the user home directory. 410275970ScyHowever, there should be only one 411275970Scy.Cm .rnd , 412275970Scymost conveniently 413275970Scyin the root directory, so it is convenient to define the 414275970Scy.Cm $RANDFILE 415275970Scyenvironment variable used by the OpenSSL library as the path to 416275970Scy.Cm /.rnd . 417275970Scy.Pp 418275970ScyInstalling the keys as root might not work in NFS\-mounted 419275970Scyshared file systems, as NFS clients may not be able to write 420275970Scyto the shared keys directory, even as root. 421275970ScyIn this case, NFS clients can specify the files in another 422275970Scydirectory such as 423275970Scy.Pa /etc 424275970Scyusing the 425275970Scy.Ic keysdir 426275970Scycommand. 427275970ScyThere is no need for one client to read the keys and certificates 428275970Scyof other clients or servers, as these data are obtained automatically 429275970Scyby the Autokey protocol. 430275970Scy.Pp 431275970ScyOrdinarily, cryptographic files are generated by the host that uses them, 432275970Scybut it is possible for a trusted agent (TA) to generate these files 433275970Scyfor other hosts; however, in such cases files should always be encrypted. 434275970ScyThe subject name and trusted name default to the hostname 435275970Scyof the host generating the files, but can be changed by command line options. 436275970ScyIt is convenient to designate the owner name and trusted name 437275970Scyas the subject and issuer fields, respectively, of the certificate. 438275970ScyThe owner name is also used for the host and sign key files, 439275970Scywhile the trusted name is used for the identity files. 440275970Scyseconds. 441275970Scyseconds. 442275970Scys Trusted Hosts and Groups 443275970ScyEach cryptographic configuration involves selection of a signature scheme 444275970Scyand identification scheme, called a cryptotype, 445275970Scyas explained in the 446275970Scy.Sx Authentication Options 447275970Scysection of 448275970Scy.Xr ntp.conf 5 . 449275970ScyThe default cryptotype uses RSA encryption, MD5 message digest 450275970Scyand TC identification. 451275970ScyFirst, configure a NTP subnet including one or more low\-stratum 452275970Scytrusted hosts from which all other hosts derive synchronization 453275970Scydirectly or indirectly. 454275970ScyTrusted hosts have trusted certificates; 455275970Scyall other hosts have nontrusted certificates. 456275970ScyThese hosts will automatically and dynamically build authoritative 457275970Scycertificate trails to one or more trusted hosts. 458275970ScyA trusted group is the set of all hosts that have, directly or indirectly, 459275970Scya certificate trail ending at a trusted host. 460275970ScyThe trail is defined by static configuration file entries 461275970Scyor dynamic means described on the 462275970Scy.Sx Automatic NTP Configuration Options 463275970Scysection of 464275970Scy.Xr ntp.conf 5 . 465275970Scy.Pp 466275970ScyOn each trusted host as root, change to the keys directory. 467275970ScyTo insure a fresh fileset, remove all 468275970Scy.Cm ntpkey 469275970Scyfiles. 470275970ScyThen run 471275970Scy.Nm 472275970Scy.Fl T 473275970Scyto generate keys and a trusted certificate. 474275970ScyOn all other hosts do the same, but leave off the 475275970Scy.Fl T 476275970Scyflag to generate keys and nontrusted certificates. 477275970ScyWhen complete, start the NTP daemons beginning at the lowest stratum 478275970Scyand working up the tree. 479275970ScyIt may take some time for Autokey to instantiate the certificate trails 480275970Scythroughout the subnet, but setting up the environment is completely automatic. 481275970Scy.Pp 482275970ScyIf it is necessary to use a different sign key or different digest/signature 483275970Scyscheme than the default, run 484275970Scy.Nm 485275970Scywith the 486275970Scy.Fl S Ar type 487275970Scyoption, where 488275970Scy.Ar type 489275970Scyis either 490275970Scy.Cm RSA 491275970Scyor 492275970Scy.Cm DSA . 493275970ScyThe most often need to do this is when a DSA\-signed certificate is used. 494275970ScyIf it is necessary to use a different certificate scheme than the default, 495275970Scyrun 496275970Scy.Nm 497275970Scywith the 498275970Scy.Fl c Ar scheme 499275970Scyoption and selected 500275970Scy.Ar scheme 501275970Scyas needed. 502275970Scyf 503275970Scy.Nm 504275970Scyis run again without these options, it generates a new certificate 505275970Scyusing the same scheme and sign key. 506275970Scy.Pp 507275970ScyAfter setting up the environment it is advisable to update certificates 508275970Scyfrom time to time, if only to extend the validity interval. 509275970ScySimply run 510275970Scy.Nm 511275970Scywith the same flags as before to generate new certificates 512275970Scyusing existing keys. 513275970ScyHowever, if the host or sign key is changed, 514275970Scy.Xr ntpd @NTPD_MS@ 515275970Scyshould be restarted. 516275970ScyWhen 517275970Scy.Xr ntpd @NTPD_MS@ 518275970Scyis restarted, it loads any new files and restarts the protocol. 519275970ScyOther dependent hosts will continue as usual until signatures are refreshed, 520275970Scyat which time the protocol is restarted. 521275970Scy.Ss Identity Schemes 522275970ScyAs mentioned on the Autonomous Authentication page, 523275970Scythe default TC identity scheme is vulnerable to a middleman attack. 524275970ScyHowever, there are more secure identity schemes available, 525275970Scyincluding PC, IFF, GQ and MV described on the 526275970Scy.Qq Identification Schemes 527275970Scypage 528275970Scy(maybe available at 529275970Scy.Li http://www.eecis.udel.edu/%7emills/keygen.html ) . 530275970ScyThese schemes are based on a TA, one or more trusted hosts 531275970Scyand some number of nontrusted hosts. 532275970ScyTrusted hosts prove identity using values provided by the TA, 533275970Scywhile the remaining hosts prove identity using values provided 534275970Scyby a trusted host and certificate trails that end on that host. 535275970ScyThe name of a trusted host is also the name of its sugroup 536275970Scyand also the subject and issuer name on its trusted certificate. 537275970ScyThe TA is not necessarily a trusted host in this sense, but often is. 538275970Scy.Pp 539275970ScyIn some schemes there are separate keys for servers and clients. 540275970ScyA server can also be a client of another server, 541275970Scybut a client can never be a server for another client. 542275970ScyIn general, trusted hosts and nontrusted hosts that operate 543275970Scyas both server and client have parameter files that contain 544275970Scyboth server and client keys. 545275970ScyHosts that operate 546275970Scyonly as clients have key files that contain only client keys. 547275970Scy.Pp 548275970ScyThe PC scheme supports only one trusted host in the group. 549275970ScyOn trusted host alice run 550275970Scy.Nm 551275970Scy.Fl P 552275970Scy.Fl p Ar password 553275970Scyto generate the host key file 554275970Scy.Pa ntpkey_RSAkey_ Ns Ar alice.filestamp 555275970Scyand trusted private certificate file 556275970Scy.Pa ntpkey_RSA\-MD5_cert_ Ns Ar alice.filestamp . 557275970ScyCopy both files to all group hosts; 558275970Scythey replace the files which would be generated in other schemes. 559275970ScyOn each host bob install a soft link from the generic name 560275970Scy.Pa ntpkey_host_ Ns Ar bob 561275970Scyto the host key file and soft link 562275970Scy.Pa ntpkey_cert_ Ns Ar bob 563275970Scyto the private certificate file. 564275970ScyNote the generic links are on bob, but point to files generated 565275970Scyby trusted host alice. 566275970ScyIn this scheme it is not possible to refresh 567275970Scyeither the keys or certificates without copying them 568275970Scyto all other hosts in the group. 569275970Scy.Pp 570275970ScyFor the IFF scheme proceed as in the TC scheme to generate keys 571275970Scyand certificates for all group hosts, then for every trusted host in the group, 572275970Scygenerate the IFF parameter file. 573275970ScyOn trusted host alice run 574275970Scy.Nm 575275970Scy.Fl T 576275970Scy.Fl I 577275970Scy.Fl p Ar password 578275970Scyto produce her parameter file 579275970Scy.Pa ntpkey_IFFpar_ Ns Ar alice.filestamp , 580275970Scywhich includes both server and client keys. 581275970ScyCopy this file to all group hosts that operate as both servers 582275970Scyand clients and install a soft link from the generic 583275970Scy.Pa ntpkey_iff_ Ns Ar alice 584275970Scyto this file. 585275970ScyIf there are no hosts restricted to operate only as clients, 586275970Scythere is nothing further to do. 587275970ScyAs the IFF scheme is independent 588275970Scyof keys and certificates, these files can be refreshed as needed. 589275970Scy.Pp 590275970ScyIf a rogue client has the parameter file, it could masquerade 591275970Scyas a legitimate server and present a middleman threat. 592275970ScyTo eliminate this threat, the client keys can be extracted 593275970Scyfrom the parameter file and distributed to all restricted clients. 594275970ScyAfter generating the parameter file, on alice run 595275970Scy.Nm 596275970Scy.Fl e 597275970Scyand pipe the output to a file or mail program. 598275970ScyCopy or mail this file to all restricted clients. 599275970ScyOn these clients install a soft link from the generic 600275970Scy.Pa ntpkey_iff_ Ns Ar alice 601275970Scyto this file. 602275970ScyTo further protect the integrity of the keys, 603275970Scyeach file can be encrypted with a secret password. 604275970Scy.Pp 605275970ScyFor the GQ scheme proceed as in the TC scheme to generate keys 606275970Scyand certificates for all group hosts, then for every trusted host 607275970Scyin the group, generate the IFF parameter file. 608275970ScyOn trusted host alice run 609275970Scy.Nm 610275970Scy.Fl T 611275970Scy.Fl G 612275970Scy.Fl p Ar password 613275970Scyto produce her parameter file 614275970Scy.Pa ntpkey_GQpar_ Ns Ar alice.filestamp , 615275970Scywhich includes both server and client keys. 616275970ScyCopy this file to all group hosts and install a soft link 617275970Scyfrom the generic 618275970Scy.Pa ntpkey_gq_ Ns Ar alice 619275970Scyto this file. 620275970ScyIn addition, on each host bob install a soft link 621275970Scyfrom generic 622275970Scy.Pa ntpkey_gq_ Ns Ar bob 623275970Scyto this file. 624275970ScyAs the GQ scheme updates the GQ parameters file and certificate 625275970Scyat the same time, keys and certificates can be regenerated as needed. 626275970Scy.Pp 627275970ScyFor the MV scheme, proceed as in the TC scheme to generate keys 628275970Scyand certificates for all group hosts. 629275970ScyFor illustration assume trish is the TA, alice one of several trusted hosts 630275970Scyand bob one of her clients. 631275970ScyOn TA trish run 632275970Scy.Nm 633275970Scy.Fl V Ar n 634275970Scy.Fl p Ar password , 635275970Scywhere 636275970Scy.Ar n 637275970Scyis the number of revokable keys (typically 5) to produce 638275970Scythe parameter file 639275970Scy.Pa ntpkeys_MVpar_ Ns Ar trish.filestamp 640275970Scyand client key files 641275970Scy.Pa ntpkeys_MVkeyd_ Ns Ar trish.filestamp 642275970Scywhere 643275970Scy.Ar d 644275970Scyis the key number (0 \&< 645275970Scy.Ar d 646275970Scy\&< 647275970Scy.Ar n ) . 648275970ScyCopy the parameter file to alice and install a soft link 649275970Scyfrom the generic 650275970Scy.Pa ntpkey_mv_ Ns Ar alice 651275970Scyto this file. 652275970ScyCopy one of the client key files to alice for later distribution 653275970Scyto her clients. 654275970ScyIt doesn't matter which client key file goes to alice, 655275970Scysince they all work the same way. 656275970ScyAlice copies the client key file to all of her cliens. 657275970ScyOn client bob install a soft link from generic 658275970Scy.Pa ntpkey_mvkey_ Ns Ar bob 659275970Scyto the client key file. 660275970ScyAs the MV scheme is independent of keys and certificates, 661275970Scythese files can be refreshed as needed. 662275970Scy.Ss Command Line Options 663275970Scy.Bl -tag -width indent 664275970Scy.It Fl c Ar scheme 665275970ScySelect certificate message digest/signature encryption scheme. 666275970ScyThe 667275970Scy.Ar scheme 668275970Scycan be one of the following: 669275970Scy. Cm RSA\-MD2 , RSA\-MD5 , RSA\-SHA , RSA\-SHA1 , RSA\-MDC2 , RSA\-RIPEMD160 , DSA\-SHA , 670275970Scyor 671275970Scy.Cm DSA\-SHA1 . 672275970ScyNote that RSA schemes must be used with a RSA sign key and DSA 673275970Scyschemes must be used with a DSA sign key. 674275970ScyThe default without this option is 675275970Scy.Cm RSA\-MD5 . 676275970Scy.It Fl d 677275970ScyEnable debugging. 678275970ScyThis option displays the cryptographic data produced in eye\-friendly billboards. 679275970Scy.It Fl e 680275970ScyWrite the IFF client keys to the standard output. 681275970ScyThis is intended for automatic key distribution by mail. 682275970Scy.It Fl G 683275970ScyGenerate parameters and keys for the GQ identification scheme, 684275970Scyobsoleting any that may exist. 685275970Scy.It Fl g 686275970ScyGenerate keys for the GQ identification scheme 687275970Scyusing the existing GQ parameters. 688275970ScyIf the GQ parameters do not yet exist, create them first. 689275970Scy.It Fl H 690275970ScyGenerate new host keys, obsoleting any that may exist. 691275970Scy.It Fl I 692275970ScyGenerate parameters for the IFF identification scheme, 693275970Scyobsoleting any that may exist. 694275970Scy.It Fl i Ar name 695275970ScySet the suject name to 696275970Scy.Ar name . 697275970ScyThis is used as the subject field in certificates 698275970Scyand in the file name for host and sign keys. 699275970Scy.It Fl M 700275970ScyGenerate MD5 keys, obsoleting any that may exist. 701275970Scy.It Fl P 702275970ScyGenerate a private certificate. 703275970ScyBy default, the program generates public certificates. 704275970Scy.It Fl p Ar password 705275970ScyEncrypt generated files containing private data with 706275970Scy.Ar password 707275970Scyand the DES\-CBC algorithm. 708275970Scy.It Fl q 709275970ScySet the password for reading files to password. 710275970Scy.It Fl S Oo Cm RSA | DSA Oc 711275970ScyGenerate a new sign key of the designated type, 712275970Scyobsoleting any that may exist. 713275970ScyBy default, the program uses the host key as the sign key. 714275970Scy.It Fl s Ar name 715275970ScySet the issuer name to 716275970Scy.Ar name . 717275970ScyThis is used for the issuer field in certificates 718275970Scyand in the file name for identity files. 719275970Scy.It Fl T 720275970ScyGenerate a trusted certificate. 721275970ScyBy default, the program generates a non\-trusted certificate. 722275970Scy.It Fl V Ar nkeys 723275970ScyGenerate parameters and keys for the Mu\-Varadharajan (MV) identification scheme. 724275970Scy.El 725275970Scy.Ss Random Seed File 726275970ScyAll cryptographically sound key generation schemes must have means 727275970Scyto randomize the entropy seed used to initialize 728275970Scythe internal pseudo\-random number generator used 729275970Scyby the library routines. 730275970ScyThe OpenSSL library uses a designated random seed file for this purpose. 731275970ScyThe file must be available when starting the NTP daemon and 732275970Scy.Nm 733275970Scyprogram. 734275970ScyIf a site supports OpenSSL or its companion OpenSSH, 735275970Scyit is very likely that means to do this are already available. 736275970Scy.Pp 737275970ScyIt is important to understand that entropy must be evolved 738275970Scyfor each generation, for otherwise the random number sequence 739275970Scywould be predictable. 740275970ScyVarious means dependent on external events, such as keystroke intervals, 741275970Scycan be used to do this and some systems have built\-in entropy sources. 742275970ScySuitable means are described in the OpenSSL software documentation, 743275970Scybut are outside the scope of this page. 744275970Scy.Pp 745275970ScyThe entropy seed used by the OpenSSL library is contained in a file, 746275970Scyusually called 747275970Scy.Cm .rnd , 748275970Scywhich must be available when starting the NTP daemon 749275970Scyor the 750275970Scy.Nm 751275970Scyprogram. 752275970ScyThe NTP daemon will first look for the file 753275970Scyusing the path specified by the 754275970Scy.Ic randfile 755275970Scysubcommand of the 756275970Scy.Ic crypto 757275970Scyconfiguration command. 758275970ScyIf not specified in this way, or when starting the 759275970Scy.Nm 760275970Scyprogram, 761275970Scythe OpenSSL library will look for the file using the path specified 762275970Scyby the 763275970Scy.Ev RANDFILE 764275970Scyenvironment variable in the user home directory, 765275970Scywhether root or some other user. 766275970ScyIf the 767275970Scy.Ev RANDFILE 768275970Scyenvironment variable is not present, 769275970Scythe library will look for the 770275970Scy.Cm .rnd 771275970Scyfile in the user home directory. 772275970ScyIf the file is not available or cannot be written, 773275970Scythe daemon exits with a message to the system log and the program 774275970Scyexits with a suitable error message. 775275970Scy.Ss Cryptographic Data Files 776275970ScyAll other file formats begin with two lines. 777275970ScyThe first contains the file name, including the generated host name 778275970Scyand filestamp. 779275970ScyThe second contains the datestamp in conventional Unix date format. 780275970ScyLines beginning with # are considered comments and ignored by the 781275970Scy.Nm 782275970Scyprogram and 783275970Scy.Xr ntpd @NTPD_MS@ 784275970Scydaemon. 785275970ScyCryptographic values are encoded first using ASN.1 rules, 786275970Scythen encrypted if necessary, and finally written PEM\-encoded 787275970Scyprintable ASCII format preceded and followed by MIME content identifier lines. 788275970Scy.Pp 789275970ScyThe format of the symmetric keys file is somewhat different 790275970Scythan the other files in the interest of backward compatibility. 791275970ScySince DES\-CBC is deprecated in NTPv4, the only key format of interest 792275970Scyis MD5 alphanumeric strings. 793275970ScyFollowing hte heard the keys are 794275970Scyentered one per line in the format 795275970Scy.D1 Ar keyno type key 796275970Scywhere 797275970Scy.Ar keyno 798275970Scyis a positive integer in the range 1\-65,535, 799275970Scy.Ar type 800275970Scyis the string MD5 defining the key format and 801275970Scy.Ar key 802275970Scyis the key itself, 803275970Scywhich is a printable ASCII string 16 characters or less in length. 804275970ScyEach character is chosen from the 93 printable characters 805275970Scyin the range 0x21 through 0x7f excluding space and the 806275970Scy.Ql # 807275970Scycharacter. 808275970Scy.Pp 809275970ScyNote that the keys used by the 810275970Scy.Xr ntpq @NTPQ_MS@ 811275970Scyand 812275970Scy.Xr ntpdc @NTPDC_MS@ 813275970Scyprograms 814275970Scyare checked against passwords requested by the programs 815275970Scyand entered by hand, so it is generally appropriate to specify these keys 816275970Scyin human readable ASCII format. 817275970Scy.Pp 818275970ScyThe 819275970Scy.Nm 820275970Scyprogram generates a MD5 symmetric keys file 821275970Scy.Pa ntpkey_MD5key_ Ns Ar hostname.filestamp . 822275970ScySince the file contains private shared keys, 823275970Scyit should be visible only to root and distributed by secure means 824275970Scyto other subnet hosts. 825275970ScyThe NTP daemon loads the file 826275970Scy.Pa ntp.keys , 827275970Scyso 828275970Scy.Nm 829275970Scyinstalls a soft link from this name to the generated file. 830275970ScySubsequently, similar soft links must be installed by manual 831275970Scyor automated means on the other subnet hosts. 832275970ScyWhile this file is not used with the Autokey Version 2 protocol, 833275970Scyit is needed to authenticate some remote configuration commands 834275970Scyused by the 835275970Scy.Xr ntpq @NTPQ_MS@ 836275970Scyand 837275970Scy.Xr ntpdc @NTPDC_MS@ 838275970Scyutilities. 839275970Scy.Sh "OPTIONS" 840275970Scy.Bl -tag 841275970Scy.It Fl b Ar imbits , Fl \-imbits Ns = Ns Ar imbits 842275970Scyidentity modulus bits. 843275970ScyThis option takes an integer number as its argument. 844275970ScyThe value of 845275970Scy.Ar imbits 846275970Scyis constrained to being: 847275970Scy.in +4 848275970Scy.nf 849275970Scy.na 850275970Scyin the range 256 through 2048 851275970Scy.fi 852275970Scy.in -4 853275970Scy.sp 854275970ScyThe number of bits in the identity modulus. The default is 256. 855275970Scy.It Fl c Ar scheme , Fl \-certificate Ns = Ns Ar scheme 856275970Scycertificate scheme. 857275970Scy.sp 858275970Scyscheme is one of 859275970ScyRSA\-MD2, RSA\-MD5, RSA\-SHA, RSA\-SHA1, RSA\-MDC2, RSA\-RIPEMD160, 860275970ScyDSA\-SHA, or DSA\-SHA1. 861275970Scy.sp 862275970ScySelect the certificate message digest/signature encryption scheme. 863275970ScyNote that RSA schemes must be used with a RSA sign key and DSA 864275970Scyschemes must be used with a DSA sign key. The default without 865275970Scythis option is RSA\-MD5. 866275970Scy.It Fl C Ar cipher , Fl \-cipher Ns = Ns Ar cipher 867275970Scyprivatekey cipher. 868275970Scy.sp 869275970ScySelect the cipher which is used to encrypt the files containing 870275970Scyprivate keys. The default is three\-key triple DES in CBC mode, 871275970Scyequivalent to "@code{\-C des\-ede3\-cbc". The openssl tool lists ciphers 872275970Scyavailable in "\fBopenssl \-h\fP" output. 873275970Scy.It Fl d , Fl \-debug\-level 874275970ScyIncrease debug verbosity level. 875275970ScyThis option may appear an unlimited number of times. 876275970Scy.sp 877275970Scy.It Fl D Ar number , Fl \-set\-debug\-level Ns = Ns Ar number 878275970ScySet the debug verbosity level. 879275970ScyThis option may appear an unlimited number of times. 880275970ScyThis option takes an integer number as its argument. 881275970Scy.sp 882275970Scy.It Fl e , Fl \-id\-key 883275970ScyWrite IFF or GQ identity keys. 884275970Scy.sp 885275970ScyWrite the IFF or GQ client keys to the standard output. This is 886275970Scyintended for automatic key distribution by mail. 887275970Scy.It Fl G , Fl \-gq\-params 888275970ScyGenerate GQ parameters and keys. 889275970Scy.sp 890275970ScyGenerate parameters and keys for the GQ identification scheme, 891275970Scyobsoleting any that may exist. 892275970Scy.It Fl H , Fl \-host\-key 893275970Scygenerate RSA host key. 894275970Scy.sp 895275970ScyGenerate new host keys, obsoleting any that may exist. 896275970Scy.It Fl I , Fl \-iffkey 897275970Scygenerate IFF parameters. 898275970Scy.sp 899275970ScyGenerate parameters for the IFF identification scheme, obsoleting 900275970Scyany that may exist. 901275970Scy.It Fl i Ar group , Fl \-ident Ns = Ns Ar group 902275970Scyset Autokey group name. 903275970Scy.sp 904275970ScySet the optional Autokey group name to name. This is used in 905275970Scythe file name of IFF, GQ, and MV client parameters files. In 906275970Scythat role, the default is the host name if this option is not 907275970Scyprovided. The group name, if specified using \fB\-i/\-\-ident\fP or 908275970Scyusing \fB\-s/\-\-subject\-name\fP following an '\fB@\fP' character, 909275970Scyis also a part of the self\-signed host certificate's subject and 910275970Scyissuer names in the form \fBhost@group\fP and should match the 911275970Scy\'\fBcrypto ident\fP' or '\fBserver ident\fP' configuration in 912275970Scy\fBntpd\fP's configuration file. 913275970Scy.It Fl l Ar lifetime , Fl \-lifetime Ns = Ns Ar lifetime 914275970Scyset certificate lifetime. 915275970ScyThis option takes an integer number as its argument. 916275970Scy.sp 917275970ScySet the certificate expiration to lifetime days from now. 918275970Scy.It Fl M , Fl \-md5key 919275970Scygenerate MD5 keys. 920275970Scy.sp 921275970ScyGenerate MD5 keys, obsoleting any that may exist. 922275970Scy.It Fl m Ar modulus , Fl \-modulus Ns = Ns Ar modulus 923275970Scymodulus. 924275970ScyThis option takes an integer number as its argument. 925275970ScyThe value of 926275970Scy.Ar modulus 927275970Scyis constrained to being: 928275970Scy.in +4 929275970Scy.nf 930275970Scy.na 931275970Scyin the range 256 through 2048 932275970Scy.fi 933275970Scy.in -4 934275970Scy.sp 935275970ScyThe number of bits in the prime modulus. The default is 512. 936275970Scy.It Fl P , Fl \-pvt\-cert 937275970Scygenerate PC private certificate. 938275970Scy.sp 939275970ScyGenerate a private certificate. By default, the program generates 940275970Scypublic certificates. 941275970Scy.It Fl p Ar passwd , Fl \-password Ns = Ns Ar passwd 942275970Scylocal private password. 943275970Scy.sp 944275970ScyLocal files containing private data are encrypted with the 945275970ScyDES\-CBC algorithm and the specified password. The same password 946275970Scymust be specified to the local ntpd via the "crypto pw password" 947275970Scyconfiguration command. The default password is the local 948275970Scyhostname. 949275970Scy.It Fl q Ar passwd , Fl \-export\-passwd Ns = Ns Ar passwd 950275970Scyexport IFF or GQ group keys with password. 951275970Scy.sp 952275970ScyExport IFF or GQ identity group keys to the standard output, 953275970Scyencrypted with the DES\-CBC algorithm and the specified password. 954275970ScyThe same password must be specified to the remote ntpd via the 955275970Scy"crypto pw password" configuration command. See also the option 956275970Scy-\-id\-key (\-e) for unencrypted exports. 957275970Scy.It Fl S Ar sign , Fl \-sign\-key Ns = Ns Ar sign 958275970Scygenerate sign key (RSA or DSA). 959275970Scy.sp 960275970ScyGenerate a new sign key of the designated type, obsoleting any 961275970Scythat may exist. By default, the program uses the host key as the 962275970Scysign key. 963275970Scy.It Fl s Ar host@group , Fl \-subject\-name Ns = Ns Ar host@group 964275970Scyset host and optionally group name. 965275970Scy.sp 966275970ScySet the Autokey host name, and optionally, group name specified 967275970Scyfollowing an '\fB@\fP' character. The host name is used in the file 968275970Scyname of generated host and signing certificates, without the 969275970Scygroup name. The host name, and if provided, group name are used 970275970Scyin \fBhost@group\fP form for the host certificate's subject and issuer 971275970Scyfields. Specifying '\fB\-s @group\fP' is allowed, and results in 972275970Scyleaving the host name unchanged while appending \fB@group\fP to the 973275970Scysubject and issuer fields, as with \fB\-i group\fP. The group name, or 974275970Scyif not provided, the host name are also used in the file names 975275970Scyof IFF, GQ, and MV client parameter files. 976275970Scy.It Fl T , Fl \-trusted\-cert 977275970Scytrusted certificate (TC scheme). 978275970Scy.sp 979275970ScyGenerate a trusted certificate. By default, the program generates 980275970Scya non\-trusted certificate. 981275970Scy.It Fl V Ar num , Fl \-mv\-params Ns = Ns Ar num 982275970Scygenerate <num> MV parameters. 983275970ScyThis option takes an integer number as its argument. 984275970Scy.sp 985275970ScyGenerate parameters and keys for the Mu\-Varadharajan (MV) 986275970Scyidentification scheme. 987275970Scy.It Fl v Ar num , Fl \-mv\-keys Ns = Ns Ar num 988275970Scyupdate <num> MV keys. 989275970ScyThis option takes an integer number as its argument. 990275970Scy.sp 991275970ScyThis option has not been fully documented. 992275970Scy.It Fl \&? , Fl \-help 993275970ScyDisplay usage information and exit. 994275970Scy.It Fl \&! , Fl \-more\-help 995275970ScyPass the extended usage information through a pager. 996275970Scy.It Fl > Oo Ar cfgfile Oc , Fl \-save\-opts Oo Ns = Ns Ar cfgfile Oc 997275970ScySave the option state to \fIcfgfile\fP. The default is the \fIlast\fP 998275970Scyconfiguration file listed in the \fBOPTION PRESETS\fP section, below. 999275970ScyThe command will exit after updating the config file. 1000275970Scy.It Fl < Ar cfgfile , Fl \-load\-opts Ns = Ns Ar cfgfile , Fl \-no\-load\-opts 1001275970ScyLoad options from \fIcfgfile\fP. 1002275970ScyThe \fIno\-load\-opts\fP form will disable the loading 1003275970Scyof earlier config/rc/ini files. \fI\-\-no\-load\-opts\fP is handled early, 1004275970Scyout of order. 1005275970Scy.It Fl \-version Op Brq Ar v|c|n 1006275970ScyOutput version of program and exit. The default mode is `v', a simple 1007275970Scyversion. The `c' mode will print copyright information and `n' will 1008275970Scyprint the full copyright notice. 1009275970Scy.El 1010275970Scy.Sh "OPTION PRESETS" 1011275970ScyAny option that is not marked as \fInot presettable\fP may be preset 1012275970Scyby loading values from configuration ("RC" or ".INI") file(s) and values from 1013275970Scyenvironment variables named: 1014275970Scy.nf 1015275970Scy \fBNTP_KEYGEN_<option\-name>\fP or \fBNTP_KEYGEN\fP 1016275970Scy.fi 1017275970Scy.ad 1018275970ScyThe environmental presets take precedence (are processed later than) 1019275970Scythe configuration files. 1020275970ScyThe \fIhomerc\fP files are "\fI$HOME\fP", and "\fI.\fP". 1021275970ScyIf any of these are directories, then the file \fI.ntprc\fP 1022275970Scyis searched for within those directories. 1023275970Scy.Sh USAGE 1024275970ScyThe 1025275970Scy.Fl p Ar password 1026275970Scyoption specifies the write password and 1027275970Scy.Fl q Ar password 1028275970Scyoption the read password for previously encrypted files. 1029275970ScyThe 1030275970Scy.Nm 1031275970Scyprogram prompts for the password if it reads an encrypted file 1032275970Scyand the password is missing or incorrect. 1033275970ScyIf an encrypted file is read successfully and 1034275970Scyno write password is specified, the read password is used 1035275970Scyas the write password by default. 1036275970Scy.Sh "ENVIRONMENT" 1037275970ScySee \fBOPTION PRESETS\fP for configuration environment variables. 1038275970Scy.Sh "FILES" 1039275970ScySee \fBOPTION PRESETS\fP for configuration files. 1040275970Scy.Sh "EXIT STATUS" 1041275970ScyOne of the following exit values will be returned: 1042275970Scy.Bl -tag 1043275970Scy.It 0 " (EXIT_SUCCESS)" 1044275970ScySuccessful program execution. 1045275970Scy.It 1 " (EXIT_FAILURE)" 1046275970ScyThe operation failed or the command syntax was not valid. 1047275970Scy.It 66 " (EX_NOINPUT)" 1048275970ScyA specified configuration file could not be loaded. 1049275970Scy.It 70 " (EX_SOFTWARE)" 1050275970Scylibopts had an internal operational error. Please report 1051275970Scyit to autogen\-users@lists.sourceforge.net. Thank you. 1052275970Scy.El 1053275970Scy.Sh "AUTHORS" 1054280849ScyThe University of Delaware and Network Time Foundation 1055275970Scy.Sh "COPYRIGHT" 1056316068SdelphijCopyright (C) 1992\-2017 The University of Delaware and Network Time Foundation all rights reserved. 1057275970ScyThis program is released under the terms of the NTP license, <http://ntp.org/license>. 1058275970Scy.Sh BUGS 1059275970ScyIt can take quite a while to generate some cryptographic values, 1060275970Scyfrom one to several minutes with modern architectures 1061275970Scysuch as UltraSPARC and up to tens of minutes to an hour 1062275970Scywith older architectures such as SPARC IPC. 1063275970Scy.Pp 1064275970ScyPlease report bugs to http://bugs.ntp.org . 1065275970Scy.Pp 1066275970ScyPlease send bug reports to: http://bugs.ntp.org, bugs@ntp.org 1067275970Scy.Sh NOTES 1068275970ScyPortions of this document came from FreeBSD. 1069275970Scy.Pp 1070275970ScyThis manual page was \fIAutoGen\fP\-erated from the \fBntp\-keygen\fP 1071275970Scyoption definitions. 1072