The GNU Privacy Guard 2 ========================= Version 1.9.x GnuPG 1.9 is the future version of GnuPG; it is based on the gnupg-1.3 code and the previous newpg package. It will eventually lead to a GnuPG 2.0 release. Note that GnuPG 1.3 and 1.9 are not always in sync and thus features and bug fixes done in 1.3 are not necessary available in 1.9. You should use this GnuPG version if you want to use the gpg-agent or gpgsm (the S/MIME variant of gpg). Note that the gpg-agent is also helpful when using the standard gpg versions (1.2.x or 1.3.x). BUILD INSTRUCTIONS ================== GnuPG 1.9 depends on the following packages: libgpg-error (ftp://ftp.gnupg.org/gcrypt/libgpg-error/) libgcrypt (ftp://ftp.gnupg.org/gcrypt/libgcrypt/) libassuan (ftp://ftp.gnupg.org/gcrypt/alpha/libassuan/) libksba (ftp://ftp.gnupg.org/gcrypt/alpha/libksba/) If you use the configure option --enable-agent-only, libksba is not required. You also need the pinentry package for most function of GnuPG; however it is not a build requirement. pinentry is available at ftp://ftp.gnupg.org/gcrypt/pinentry/ . You should get the latest versions of course, the GnuPG configure script complains if a version is not sufficient. After building and installing the above packages in the order as given above, you may now continue with GnuPG installation (you may also just try to build GnuPG to see whether your already installed versions are sufficient). As with all packages, you just have to do ./configure make make install (Before doing install you might need to become root.) If everything succeeds, you have a working GnuPG with support for S/MIME and smartcards. Note that there is no binary gpg but a gpg2 so that this package won't confict with a GnuPG 1.2 or 1.3 installation. gpg2 behaves just like gpg; it is however suggested to keep using gpg 1.2.x or 1.3.x. In case of problem please ask on gpa-dev@gnupg.org for advise. Note that this release is only expected to build on GNU and *BSD systems. A texinfo manual named `gnupg.info' will get installed. Some commands and options given below. See also the section `SMARTCARD INTRO'. COMMANDS ======== gpgsm: ------ --learn-card Read information about the private keys from the smartcard and import the certificates from there. --export Export all certificates stored in the Keybox or those specified on the command line. When using --armor a few informational lines are prepended before each block. gpg2: (Note that these card commands are also available with gpg 1.3.x) ----- --card-status Show information pertaining smartcards implementing the OpenPGP application. --change-pin Offers a menu to change the PIN of OpenPGP smartcards and to reset the retry counters. --card-edit Offers a menu to change any data object on the card and to generate the keys. OPTIONS ======= gpgsm: ------ --include-certs Using N of -2 includes all certificate except for the Root cert, -1 includes all certs, 0 does not include any certs, 1 includes only the signers cert (this is the default) and all other positives values include up to N certs starting with the signer cert. --policy-file Chnage the deault name of the policy file --enable-policy-checks --disable-policy-checks By default policy checks are enabled. These options may be used to change it. --enable-crl-checks --disable-crl-checks By default the CRL checks are enabled and the DirMngr is used to check for revoked certificates. The disable option is most useful with a off-line connection to suppres this check. --agent-program Specify an agent program to be used for secret key operations. The default value is "../agent/gpg-agent". This is only used as a fallback when the envrionment varaibale GPG_AGENT_INFO is not set or a running agent can't be connected. --dirmngr-program Specify a dirmngr program to be used for CRL checks. The default value is "/usr/sbin/dirmngr". This is only used as a fallback when the environment varaibale DIRMNGR_INFO is not set or a running dirmngr can't be connected. --no-secmem-warning Don't print the warning "no secure memory" --armor Create PEM ecoded output. Default is binary output. --base64 Create Base-64 encoded output; i.e. PEM without the header lines. --assume-armor Assume the input data is PEM encoded. Default is to autodetect the encoding but this is may fail. --assume-base64 Assume the input data is plain base-64 encoded. --assume-binary Assume the input data is binary encoded. --server Run in server mode. This is used by GPGME to control gpgsm. See the assuan specification regarding gpgsm about the used protocol. Some options are ignored in server mode. --local-user Set the user to be used for signing. The default is the first secret key found in the database. --with-key-data Displays extra information with the --list-keys commands. Especially a line tagged "grp" is printed which tells you the keygrip of a key. This is string is for example used as the filename of the secret key. gpg-agent: --------- --pinentry-program Specify the PINentry program. The default value is "/bin/pinentry" so you most likely want to specify it. --no-grab Tell the pinentry not to grab keybourd and mouse. You most likely want to give this option during testing and development to avoid lockups in case of bugs. scdaemon: -------- --ctapi-driver The default for Scdaemon is to use the PC/SC API currently provided by libpcsclite.so. As an alternative the ctAPI can be used by specify this option with the appropriate driver name (e.g. libtowitoko.so). --reader-port This specifies the port of the chipcard reader. For PC/SC this is currently ignored and the first PC/SC reader is used. For the ctAPI, a number must be specified (the default is 32768 for the first USB port). --disable-ccid Disable the integrated support for CCID compliant readers. This allows to fall back to one of the other drivers even if the internal CCID driver can handle the reader. Note, that CCID support is only available if libusb was available at build time. FILES ===== The default home directory is ~/.gnupg. It can be changed by either the --homedir option or by seting the environment variable GNUPGHOME. This is a list of files usually found in this directory: gpgsm.conf Options for gpgsm. Options are the same as the command line options but don't enter the leading dashes and give arguments without an equal sign. Blank lines and lines starting with a hash mark as the first non whitye space character are ignored. gpg-agent.conf Options for gpg-agent scdaemon.conf Options for scdaemon. dirmngr.conf Options for the DirMngr which is not part of this package and the option file wilol most likely be moved to /etc gpg.conf Options for gpg. Note that old versions of gpg use the filename `options' instead of `gpg.conf'. gpg.conf-1.9.x Options for gpg; tried before gpg.conf policies.txt A list of allowed CA policies. This file should give the object identifiers of the policies line by line. Empty lines and lines startung with a hash mark are ignored. ++++++++++ 2.289.9.9 ++++++++++ trustlist.txt A list of trusted certificates. The file will be created automagically with some explaining comments. By using gpg-agent's option --allow-mark-trusted, gpg-agent may add new entries after user confirmation. random_seed Used internally for keeping the state of the RNG over invocations. pubring.kbx The database file with the certificates. pubring.gpg The database file with the OpenPGP public keys. This will eventually be merged with pubring.kbx secring.gpg The database file with the OpenPGP secret keys. This will be removed when gpg is changed to make use of the gpg-agent. private-keys-v1.d/ Directory holding the private keys maintained by gpg-agent. For detailed info see agent/keyformat.txt. Note that there is a helper tool gpg-protect-tool which may be used to protect or unprotect keys. This is however nothing a user should care about. SOURCE FILES ============ Here is a list of directories with source files: jnlib/ utility functions kbx/ keybox library g10/ the gpg program here called gpg2 sm/ the gpgsm program agent/ the gpg-agent scd/ the smartcard daemon doc/ documentation HOW TO SPECIFY A USER ID ======================== Due to the way X.509 certificates are made up we need a few new ways to specify a certificate (aka key in OpenPGP). In addition to the ways a user ID can be specified with gpg, I have implemented 3 new modes for gpgsm, here is the entire list of ways to specify a key: * By keyID. This format is deducded from the length of the string and its content or "0x" prefix. For use with OpenPGP a exclamation mark may be appended to force use of the specified (sub)key. As with v34 OpenPGP keys, the keyID of an X509 certificate are the low 64 bits of the SHA-1 fingerprint. The use of keyIDs is just a shortcut, for all automated processing the fingerprint should be used. Examples: 234567C4 0F34E556E 01347A56A 0xAB123456 234AABBCC34567C4 0F323456784E56EAB 01AB3FED1347A5612 0x234AABBCC34567C4 * By fingerprint This is format is deduced from the length of the string and its content or "0x" prefix. Note, that only the 20 byte fingerprint is used with GPGSM (SHA-1 hash of the certificate). For use with OpenPGP a exclamation mark may be appended to force use of the specified (sub)key. Examples: 1234343434343434C434343434343434 123434343434343C3434343434343734349A3434 0E12343434343434343434EAB3484343434343434 0xE12343434343434343434EAB3484343434343434 * Exact match on OpenPGP user ID This is denoted by a leading equal sign. It does not make much sense for X.509. Example: =Heinrich Heine * Exact match on an email address. This is indicated by enclosing the email address in the usual way with left and right angles Example: * Word match All words must match exactly (not case sensitive) but can appear in any order in the user ID or a subjects name. Words are any sequences of letters, digits, the underscore and all characters with bit 7 set. Example: +Heinrich Heine duesseldorf * [NEW] Exact match by subject's DN This is indicated by a leading slash, directly followed by the rfc2253 encoded DN of the subject. Note that you can't use the string printed by "gpgsm --list-keys" because that one as been reordered and modified for better readability; use --with-colons to print the raw (but standard escaped) rfc2253 string Example: /CN=Heinrich Heine,O=Poets,L=Paris,C=FR * [NEW] Excact match by issuer's DN This is indicated by a leading hash mark, directly followed by a slash and then directly followed by the rfc2253 encoded DN of the issuer. This should return the Root cert of the issuer. See note above. Example: #/CN=Root Cert,O=Poets,L=Paris,C=FR * [NEW] Exact match by serial number and subject's DN This is indicated by a hash mark, followed by the hexadecmal representation of the serial number, the followed by a slahs and the RFC2253 encoded DN of the issuer. See note above. Example: #4F03/CN=Root Cert,O=Poets,L=Paris,C=FR * Substring match By case insensitive substring matching. This is the default mode but applications may want to explicitly indicate this by putting the asterisk in front. Example: Heine *Heine Please note that we have reused the hash mark identifier which was used in old GnuPG versions to indicate the so called local-id. It is not anymore used and there should be no conflict when used with X.509 stuff. Using the rfc2253 format of DNs has the drawback that it is not possible to map them back to the original encoding, however we don't have to do this, because our key database stores this encoding as meta data. Some of the search modes are not yet implemented ;-) HOW TO IMPORT A PRIVATE KEY =========================== There is some limited support to import a private key from a PKCS-12 file. gpgsm --import foo.p12 This requires that the gpg-agent is running. HOW TO EXPORT A PRIVATE KEY =========================== There is also limited support to export a private key in PKCS-12 format. However there is no MAC applied. gpgsm --export-secret-key-p12 userID >foo.p12 SMARTCARD INTRO =============== GPG, the OpenPGP part of GnuPG, supports the OpenPGP smartcard (surprise!); see http://g10code.com/p-card.html. [Fixme: We need to explain this further] GPGSM, the CMS (S/MIME) part of GnuPG, supports two kinds of smartcards. The most flexible way is to use PKCS#15 compliant cards, however you must have build GnuPG with support for the OpenSC library. The build process automagically detects the presence of this library and will include support for these cards. The other cards we currently support are the Telesec NetKey card with the NKS 2.0 card application and all generic DINSIG cards. Before GPGSM can make use of a new card it must gather some information, like the card's serial number, the public keys and the certificates stored on the card. Thus for a new card you need to run the command gpgsm --learn-card once. This is also a good test to see whether your card reader is properly installed. See below in case of error. Once this has been done you may use the keys stored on the card in the same way you use keys stored on the disk. gpgsm automagically knows whether a card is required and will pop up the pinentry to ask you to insert the correct card. For selecting the driver, see the options of scdaemon. A useful debugging flag is "--debug 2048" showing the communication between scdaemon and the reader. [fixme: write more stuff]