-a algorithm
Selects the cryptographic algorithm. The value of
algorithm must be one of RSAMD5, RSASHA1, DSA, NSEC3RSASHA1, NSEC3DSA, RSASHA256 or RSASHA512. These values are case insensitive.
If no algorithm is specified, then RSASHA1 will be used by default, unless the
-3 option is specified, in which case NSEC3RSASHA1 will be used instead. (If -3 is used and an algorithm is specified, that algorithm will be checked for compatibility with NSEC3.)
Note 1: that for DNSSEC, RSASHA1 is a mandatory to implement algorithm, and DSA is recommended.
Note 2: DH automatically sets the -k flag.
-3
Use an NSEC3-capable algorithm to generate a DNSSEC key. If this option is used and no algorithm is explicitly set on the command line, NSEC3RSASHA1 will be used by default.
-E engine
Specifies the name of the crypto hardware (OpenSSL engine). When compiled with PKCS#11 support it defaults to "pkcs11".
-l label
Specifies the label of the key pair in the crypto hardware. The label may be preceded by an optional OpenSSL engine name, separated by a colon, as in "pkcs11:keylabel".
-n nametype
Specifies the owner type of the key. The value of nametype must either be ZONE (for a DNSSEC zone key (KEY/DNSKEY)), HOST or ENTITY (for a key associated with a host (KEY)), USER (for a key associated with a user(KEY)) or OTHER (DNSKEY). These values are case insensitive.
-C
Compatibility mode: generates an old-style key, without any metadata. By default, dnssec-keyfromlabel will include the key's creation date in the metadata stored with the private key, and other dates may be set there as well (publication date, activation date, etc). Keys that include this data may be incompatible with older versions of BIND; the -C option suppresses them.
-c class
Indicates that the DNS record containing the key should have the specified class. If not specified, class IN is used.
-f flag
Set the specified flag in the flag field of the KEY/DNSKEY record. The only recognized flags are KSK (Key Signing Key) and REVOKE.
-G
Generate a key, but do not publish it or sign with it. This option is incompatible with -P and -A.
-h
Prints a short summary of the options and arguments to dnssec-keyfromlabel.
-K directory
Sets the directory in which the key files are to be written.
-k
Generate KEY records rather than DNSKEY records.
-p protocol
Sets the protocol value for the key. The protocol is a number between 0 and 255. The default is 3 (DNSSEC). Other possible values for this argument are listed in RFC 2535 and its successors.
-t type
Indicates the use of the key. type must be one of AUTHCONF, NOAUTHCONF, NOAUTH, or NOCONF. The default is AUTHCONF. AUTH refers to the ability to authenticate data, and CONF the ability to encrypt data.
-v level
Sets the debugging level.
-y
Allows DNSSEC key files to be generated even if the key ID would collide with that of an existing key, in the event of either key being revoked. (This is only safe to use if you are sure you won't be using RFC 5011 trust anchor maintenance with either of the keys involved.)