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zeekay
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examples/01_compute_did — derive did:zap from (kem, sig) examples/02_dual_identity_collision — rotation produces fresh DID examples/03_signed_record_roundtrip — registry signs → client verifies examples/04_capability_mailbox — PostCap vs ReadCap + revocation Each builds and runs in <1s. The capability example is in-process Go (no wire dependency) so reviewers can read 100 lines and see the cap model in isolation. The PQ-RNS examples chain into the live ComputeDID at the package root. Documented at https://zap-proto.dev/docs/examples
43 lines
1.2 KiB
Go
43 lines
1.2 KiB
Go
// Example 01 — compute a did:zap identifier from a PQ keypair.
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//
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// go run ./examples/01_compute_did
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//
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// You can change the inputs and see how the DID derives from the keys.
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// Any other SDK reading the same (kemPubKey, sigPubKey) gets the same DID.
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package main
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import (
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"crypto/sha256"
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"encoding/hex"
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"fmt"
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rns "github.com/zap-proto/rns"
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)
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func main() {
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// Fake an X-Wing pk (1216 bytes) and a hybrid sig pk (1984 bytes).
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// In a real deployment these come from `zwing.GenerateIdentity()`.
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kemPK := derive("kem-pubkey-for-acme.payments", 1216)
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sigPK := derive("sig-pubkey-for-acme.payments", 1984)
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did := rns.ComputeDID(kemPK, sigPK)
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fmt.Println("== PQ-RNS DID derivation ==")
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fmt.Printf("kem pk (first 16 bytes): %s ...\n", hex.EncodeToString(kemPK[:16]))
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fmt.Printf("sig pk (first 16 bytes): %s ...\n", hex.EncodeToString(sigPK[:16]))
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fmt.Println()
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fmt.Println(did)
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}
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// derive expands a seed into n bytes via repeated SHA-256.
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// Stand-in for real PQ key generation in this example only.
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func derive(seed string, n int) []byte {
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out := make([]byte, 0, n)
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var prev [32]byte = sha256.Sum256([]byte(seed))
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for len(out) < n {
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out = append(out, prev[:]...)
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prev = sha256.Sum256(prev[:])
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}
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return out[:n]
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}
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