DNSSEC key generation tool.
dnssec-keygen [ -a algorithm ] [ -b keysize ] [ -n nametype ] [-c class ] [ -e ] [-f flag] [-g generator ] [ -h ] [-k] [ -p protocol ] [ -r randomdev ] [ -s strength ] [ -t type ] [ -v level ] [ name ]
The dnssec-keygen command generates keys for DNSSEC (Secure DNS). It can also generate keys to use with Transaction Signatures (TSIG).
| Item | Description |
|---|---|
| -a algorithm | Selects the cryptographic algorithm. The algorithm
can have one of the following values:
Note:
|
| -b keysize | Specifies the number of bits in the key. The choice of key size depends on the algorithm used. RSAMD5 and RSASHA1 keys must be 512 - 4096 bits. Diffie Hellman keys must be 128 - 4096 bits. DSA keys must be 512 - 1024 bits and an exact multiple of 64. HMAC-MD5 keys must be 1 - 512 bits. |
| -n nametype | Specifies the owner type of the key. The value of nametype must either be ZONE (for a DNSSEC zone key), HOST or ENTITY (for a key associated with a host), USER (for a key associated with a user), or OTHER (DNSKEY). These values are not case-sensitive. |
| -c class | Indicates that the DNS record containing the key must have the specified class. If not specified, class IN is used. |
| -e | If generating an RSAMD5 or RSASHA1 key, use a large exponent. |
| -f flag | Sets the specified flag in the flag field of the KEY or the DNSKEY record. The only recognized flag is KSK (Key Signing Key) DNSKEY. |
| -g generator | If generating a DH key, use this generator. The acceptable values are 2 and 5. If generator is not specified, a known prime from RFC 2539 is used if possible; otherwise the default is 2. |
| -h | Prints a short summary of the options and arguments to the dnssec-keygen command. |
| -k | Generates KEY records rather than DNSKEY records. |
| -p protocol | Sets the protocol value for the generated key. The protocol is a number 0 - 255. The default is 3 (DNSSEC). |
| -r randomdev | Specifies the source of randomness. If the operating system does not provide a /dev/random file or equivalent device, the default source of randomness is keyboard input. The randomdev argument specifies the name of a character device or a file that contains random data to be used instead of the default. The special value keyboard indicates that keyboard input must be used. |
| -s strength | Specifies the strength value of the key. The strength argument is a number 0 - 15, and currently has no defined purpose in DNSSEC. |
| -t type | Indicates the use of the key. The 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.No key will be generated for these algorithms (DH, HMAC-MD5, HMAC-SHA1, HMAC-SHA224, HMAC-SHA256, HMAC-SHA384, HMAC-SHA512) with key type as NOAUTHCONF. |
| -v level | Sets the debugging level. |
The .key file contains a DNSKEY record that can be inserted into a zone file (directly or with a $INCLUDE statement). The .private file contains algorithm-specific fields. For security reasons, this file does not have general read permission. Both the .key file and the .private file are generated for symmetric encryption algorithm such as HMAC-MD5, even though the public key and the private key are equivalent.
dnssec-keygen -a DSA -b 768 -n ZONE example.comKexample.com.+003+26160