# pgpPktKeyV4_s Struct Reference

The version 4 format is similar to the version 3 format except for the absence of a validity period. More...

`#include <rpmpgp.h>`

## Data Fields

byte | version
byte | time [4]
byte | pubkey_algo

## Detailed Description

The version 4 format is similar to the version 3 format except for the absence of a validity period.

This has been moved to the signature packet. In addition, fingerprints of version 4 keys are calculated differently from version 3 keys, as described in section "Enhanced Key Formats."

A version 4 packet contains:

- A one-octet version number (4).
- A four-octet number denoting the time that the key was created.
- A one-octet number denoting the public key algorithm of this key
- A series of multi-precision integers comprising the key material. This algorithm-specific portion is:

Algorithm Specific Fields for RSA public keys:

- multiprecision integer (MPI) of RSA public modulus n;
- MPI of RSA public encryption exponent e.

Algorithm Specific Fields for DSA public keys:

- MPI of DSA prime p;
- MPI of DSA group order q (q is a prime divisor of p-1);
- MPI of DSA group generator g;
- MPI of DSA public key value y (= g**x where x is secret).

Algorithm Specific Fields for Elgamal public keys:

- MPI of Elgamal prime p;
- MPI of Elgamal group generator g;
- MPI of Elgamal public key value y (= g**x where x is secret).

Definition at line 672 of file rpmpgp.h.

## Field Documentation

byte pgpPktKeyV4_s::pubkey_algo

| public key algorithm. Definition at line 675 of file rpmpgp.h. Referenced by pgpPrtKey().

byte pgpPktKeyV4_s::time[4]

| time that the key was created. Definition at line 674 of file rpmpgp.h. Referenced by pgpPrtKey().

byte pgpPktKeyV4_s::version

| version number (4). Definition at line 673 of file rpmpgp.h. Referenced by pgpPrtKey().

The documentation for this struct was generated from the following file:

- rpmio/rpmpgp.h