transitorykris

; synth.s - Playing with the SN76489AN chip

; SN76489AN - https://www.smspower.org/Development/SN76489
; Data formats
; LCCTDDDD
; Latch indicator
; Channel
; Register type (0=tone, 1=volume)
; Data
; 1CCTDDDD (latch byte)

transitorykris

enum CodingKeys: String, CodingKey {
    case userName
    case keyNetAddr
    case storeNetAddr
    case dirNetAddr
    case publicKey
    case privateKey
}

class Upspin: Codable {

transitorykris

// With appropriate values for userName, keyNetAddr, storeNetAddr, dirNetAddr, proquint, and fileName
let client = SpinnerNewClient(userName, keyNetAddr, storeNetAddr, dirNetAddr, proquint)

// Save the client's configuration to the Keychain
let keychain = Keychain()
keychain.save(itemn: client)

// Create a new client from the configuration stored in they Keychain
let newClient = keychain.get()
print("Got client for \(newClient.config.userName())")

transitorykris

enum keychainError: Error {
    case failedToSave
    case failedToGet
}

class Keychain: NSObject {
    
    func save(item: Upspin) throws {
        // Create a plist suitable for saving into the Keychain
        let encoder = PropertyListEncoder()

transitorykris

// With appropriate values for userName, keyNetAddr, storeNetAddr, dirNetAddr, proquint, and fileName
let client = SpinnerNewClient(userName, keyNetAddr, storeNetAddr, dirNetAddr, proquint)

var contents: Data

do {
    try contents = upspin.client.get(fileName)
} catch {
    fatalError("failed to get file: \(error)")
}

transitorykris

// Factotum implements an agent, potentially remote, to handle private key operations.
type Factotum interface {
	// DirEntryHash is a summary used in signing and verifying directory entries.
	DirEntryHash(n, l PathName, a Attribute, p Packing, t Time, dkey, hash []byte) DEHash

	// FileSign ECDSA-signs DirEntry fields and, in some packings, file contents.
	FileSign(hash DEHash) (Signature, error)

	// ScalarMult is the bare private key operator, used in unwrapping packed data.
	// Each call needs security review to ensure it cannot be abused as a signing

transitorykris

class Upspin: NSObject {
    var config: SpinnerClientConfig!
    var client: SpinnerClient!
    
    init(userName: String, keyNetAddr: String, storeNetAddr: String, dirNetAddr: String, proquint: String) {
        config = SpinnerNewClientConfig()
        config.setUserName(userName)
        config.setKeyNetAddr(keyNetAddr)
        config.setStoreNetAddr(storeNetAddr)
        config.setDirNetAddr(dirNetAddr)

transitorykris

class Upspin: NSObject {
    var config: SpinnerClientConfig!
    var client: SpinnerClient!
    
    init(userName: String, keyNetAddr: String, storeNetAddr: String, dirNetAddr: String, proquint: String) {
        config = SpinnerNewClientConfig()
        config.setUserName(userName)
        config.setKeyNetAddr(keyNetAddr)
        config.setStoreNetAddr(storeNetAddr)
        config.setDirNetAddr(dirNetAddr)

transitorykris

Keybase proof

I hereby claim:

• I am transitorykris on github.
• I am transitorykris (https://keybase.io/transitorykris) on keybase.
• I have a public key ASB7LcrMnsGn1N7I0OuSiyUA5g0fSHPas1_f2BJFXVw1nQo

To claim this, I am signing this object:

transitorykris

#!/usr/bin/python
"""
unshred.py - Instagram unshredder

http://instagram-engineering.tumblr.com/post/12651721845/instagram-engineering-challenge-the-unshredder

There are two main components to this. The first is computing a relevant 
metric for each possible pair of slices. The second is ranking the 
pairs/metrics.