nonce | generate nonces for DNSCurve

nonce is a C library. nonce has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

This project produces nonce.a, a simple nonce management library that implements the concept of nonces as defined by DNSCurve (see All nonces are exactly 12-bytes. There are four branches, all with the same interface but defining nonces in slightly different ways: nonce12 - Uses a 12-byte counter starting from 0. Each time next_nonce is called, the nonce is incremented by one. nonce8rand4 - Uses an 8-byte counter starting from 0, plus a 4-byte random number. Each time next_nonce is called, the 8-byte counter is incremented by one, and the 4-byte random number is recalculated. tai12 - Uses a 12-byte TAI64N label (see re-calculated each time nonce_next is called. If the time has not changed (in the unlikely case where nonce_next is called twice quickly in succession), the number is incremented to ensure a unique nonce. tai8rand4 - Uses an 8-byte TAI64 label (see plus a 4-byte random number.