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main.go
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package main
import (
"crypto/rand"
"encoding/binary"
"encoding/hex"
"fmt"
"hash/crc32"
"strings"
"unsafe"
"github.com/paxos-bankchain/moneroutil"
"golang.org/x/crypto/sha3"
)
// Key consists of a ed25519 256-bit SpendKey and a ViewKey.
// In order to make the mnemonic seeds work, ViewKey is actually derived from
// SpendKey with Keccak256, also leading to SpendKey serving as the seed.
type Key struct {
spendKey, viewKey *[32]byte
}
// NewKey construsts a Key with random seed.
func NewKey() *Key {
seed := new([32]byte)
rand.Read(seed[:])
k := &Key{new([32]byte), new([32]byte)}
// The seed, which is actually just a representation of the Private Spend Key itself
copy(k.spendKey[:], seed[:])
moneroutil.ScReduce32((*moneroutil.Key)(k.spendKey))
// The Private View Key is derived by hashing the Private Spend Key with Keccak-256
k.viewKey = keccak256(k.spendKey[:])
moneroutil.ScReduce32((*moneroutil.Key)(k.viewKey))
return k
}
// Mnemonic encodes a key to mnemonic seeds.
func (k *Key) Mnemonic() []string {
w := new([25]string)
// Mnemonics convert on a ratio of 4:3 minimum: four bytes creates three words, plus one checksum word
size := uint32(len(words))
for i := 0; i < 32; i += 4 {
x := binary.LittleEndian.Uint32(k.spendKey[i : i+4])
w1 := x % size
w2 := (x/size + w1) % size
w3 := (x/size/size + w2) % size
w[i/4*3] = words[w1]
w[i/4*3+1] = words[w2]
w[i/4*3+2] = words[w3]
}
// checksum word
h := crc32.NewIEEE()
for _, v := range w[:24] {
r := string([]rune(v)[:3])
h.Write([]byte(r))
}
sum := h.Sum32()
idx := sum % 24
w[24] = w[idx]
return w[:]
}
// Address encodes public spend key and view key in base58 format.
func (k *Key) Address() string {
// The Private Spend Key and Private View Key are sent to the ed25519 scalarmult function
// to create their counterparts, the Public Spend Key and Public View Key
spendPub := publicKeyFromPrivateKey(k.spendKey)
viewPub := publicKeyFromPrivateKey(k.viewKey)
// monero main network
network := []byte{0x12}
// The pair of public keys are prepended with one network byte (the number 18, 0x12, for Monero).
// It looks like this: (network byte) + (32-byte public spend key) + (32-byte public view key).
// These 65 bytes are hashed with Keccak-256.
hash := keccak256(network, spendPub[:], viewPub[:])
// The first four bytes of the hash are appended, creating a 69-byte Public Address.
// As a last step, this 69-byte string is converted to Base58.
// However, it's not done all at once like a Bitcoin address, but rather in 8-byte blocks.
// This gives us eight full-sized blocks and one 5-byte block. Eight bytes converts to 11 or less Base58 characters;
// if a particular block converts to <11 characters, the conversion pads it with "1"s (1 is 0 in Base58).
// Likewise, the final 5-byte block can convert to 7 or less Base58 digits; the conversion will ensure the result is 7 digits.
// Due to the conditional padding, the 69-byte string will always convert to 95 Base58 characters (8 * 11 + 7).
address := moneroutil.EncodeMoneroBase58(network, spendPub[:], viewPub[:], hash[:4])
return address
}
// SpendKey encodes spend key in hex format.
func (k *Key) SpendKey() string {
return hex.EncodeToString(k.spendKey[:])
}
// ViewKey encodes view key in hex format.
func (k *Key) ViewKey() string {
return hex.EncodeToString(k.viewKey[:])
}
func keccak256(data ...[]byte) *[32]byte {
h := sha3.NewLegacyKeccak256()
for _, v := range data {
h.Write(v)
}
sum := h.Sum(nil)
sum32 := (*[32]byte)(unsafe.Pointer(&sum[0]))
return sum32
}
func publicKeyFromPrivateKey(priv *[32]byte) *[32]byte {
pub := new([32]byte)
p := new(moneroutil.ExtendedGroupElement)
moneroutil.GeScalarMultBase(p, (*moneroutil.Key)(priv))
p.ToBytes((*moneroutil.Key)(pub))
return pub
}
func main() {
key := NewKey()
fmt.Println()
fmt.Printf(" %s %s\n", "Mnemonic Seed: ", strings.Join(key.Mnemonic(), " "))
fmt.Printf(" %s %s\n", "Private Spend Key: ", key.SpendKey())
fmt.Printf(" %s %s\n", "Private View Key: ", key.ViewKey())
fmt.Printf(" %s %s\n", "Public Address: ", key.Address())
fmt.Println()
}
// English Mnemonic: https://github.com/monero-project/monero/blob/master/src/mnemonics/english.h
var words = &[...]string{
"abbey",
"abducts",
"ability",
"ablaze",
"abnormal",
"abort",
"abrasive",
"absorb",
"abyss",
"academy",
"aces",
"aching",
"acidic",
"acoustic",
"acquire",
"across",
"actress",
"acumen",
"adapt",
"addicted",
"adept",
"adhesive",
"adjust",
"adopt",
"adrenalin",
"adult",
"adventure",
"aerial",
"afar",
"affair",
"afield",
"afloat",
"afoot",
"afraid",
"after",
"against",
"agenda",
"aggravate",
"agile",
"aglow",
"agnostic",
"agony",
"agreed",
"ahead",
"aided",
"ailments",
"aimless",
"airport",
"aisle",
"ajar",
"akin",
"alarms",
"album",
"alchemy",
"alerts",
"algebra",
"alkaline",
"alley",
"almost",
"aloof",
"alpine",
"already",
"also",
"altitude",
"alumni",
"always",
"amaze",
"ambush",
"amended",
"amidst",
"ammo",
"amnesty",
"among",
"amply",
"amused",
"anchor",
"android",
"anecdote",
"angled",
"ankle",
"annoyed",
"answers",
"antics",
"anvil",
"anxiety",
"anybody",
"apart",
"apex",
"aphid",
"aplomb",
"apology",
"apply",
"apricot",
"aptitude",
"aquarium",
"arbitrary",
"archer",
"ardent",
"arena",
"argue",
"arises",
"army",
"around",
"arrow",
"arsenic",
"artistic",
"ascend",
"ashtray",
"aside",
"asked",
"asleep",
"aspire",
"assorted",
"asylum",
"athlete",
"atlas",
"atom",
"atrium",
"attire",
"auburn",
"auctions",
"audio",
"august",
"aunt",
"austere",
"autumn",
"avatar",
"avidly",
"avoid",
"awakened",
"awesome",
"awful",
"awkward",
"awning",
"awoken",
"axes",
"axis",
"axle",
"aztec",
"azure",
"baby",
"bacon",
"badge",
"baffles",
"bagpipe",
"bailed",
"bakery",
"balding",
"bamboo",
"banjo",
"baptism",
"basin",
"batch",
"bawled",
"bays",
"because",
"beer",
"befit",
"begun",
"behind",
"being",
"below",
"bemused",
"benches",
"berries",
"bested",
"betting",
"bevel",
"beware",
"beyond",
"bias",
"bicycle",
"bids",
"bifocals",
"biggest",
"bikini",
"bimonthly",
"binocular",
"biology",
"biplane",
"birth",
"biscuit",
"bite",
"biweekly",
"blender",
"blip",
"bluntly",
"boat",
"bobsled",
"bodies",
"bogeys",
"boil",
"boldly",
"bomb",
"border",
"boss",
"both",
"bounced",
"bovine",
"bowling",
"boxes",
"boyfriend",
"broken",
"brunt",
"bubble",
"buckets",
"budget",
"buffet",
"bugs",
"building",
"bulb",
"bumper",
"bunch",
"business",
"butter",
"buying",
"buzzer",
"bygones",
"byline",
"bypass",
"cabin",
"cactus",
"cadets",
"cafe",
"cage",
"cajun",
"cake",
"calamity",
"camp",
"candy",
"casket",
"catch",
"cause",
"cavernous",
"cease",
"cedar",
"ceiling",
"cell",
"cement",
"cent",
"certain",
"chlorine",
"chrome",
"cider",
"cigar",
"cinema",
"circle",
"cistern",
"citadel",
"civilian",
"claim",
"click",
"clue",
"coal",
"cobra",
"cocoa",
"code",
"coexist",
"coffee",
"cogs",
"cohesive",
"coils",
"colony",
"comb",
"cool",
"copy",
"corrode",
"costume",
"cottage",
"cousin",
"cowl",
"criminal",
"cube",
"cucumber",
"cuddled",
"cuffs",
"cuisine",
"cunning",
"cupcake",
"custom",
"cycling",
"cylinder",
"cynical",
"dabbing",
"dads",
"daft",
"dagger",
"daily",
"damp",
"dangerous",
"dapper",
"darted",
"dash",
"dating",
"dauntless",
"dawn",
"daytime",
"dazed",
"debut",
"decay",
"dedicated",
"deepest",
"deftly",
"degrees",
"dehydrate",
"deity",
"dejected",
"delayed",
"demonstrate",
"dented",
"deodorant",
"depth",
"desk",
"devoid",
"dewdrop",
"dexterity",
"dialect",
"dice",
"diet",
"different",
"digit",
"dilute",
"dime",
"dinner",
"diode",
"diplomat",
"directed",
"distance",
"ditch",
"divers",
"dizzy",
"doctor",
"dodge",
"does",
"dogs",
"doing",
"dolphin",
"domestic",
"donuts",
"doorway",
"dormant",
"dosage",
"dotted",
"double",
"dove",
"down",
"dozen",
"dreams",
"drinks",
"drowning",
"drunk",
"drying",
"dual",
"dubbed",
"duckling",
"dude",
"duets",
"duke",
"dullness",
"dummy",
"dunes",
"duplex",
"duration",
"dusted",
"duties",
"dwarf",
"dwelt",
"dwindling",
"dying",
"dynamite",
"dyslexic",
"each",
"eagle",
"earth",
"easy",
"eating",
"eavesdrop",
"eccentric",
"echo",
"eclipse",
"economics",
"ecstatic",
"eden",
"edgy",
"edited",
"educated",
"eels",
"efficient",
"eggs",
"egotistic",
"eight",
"either",
"eject",
"elapse",
"elbow",
"eldest",
"eleven",
"elite",
"elope",
"else",
"eluded",
"emails",
"ember",
"emerge",
"emit",
"emotion",
"empty",
"emulate",
"energy",
"enforce",
"enhanced",
"enigma",
"enjoy",
"enlist",
"enmity",
"enough",
"enraged",
"ensign",
"entrance",
"envy",
"epoxy",
"equip",
"erase",
"erected",
"erosion",
"error",
"eskimos",
"espionage",
"essential",
"estate",
"etched",
"eternal",
"ethics",
"etiquette",
"evaluate",
"evenings",
"evicted",
"evolved",
"examine",
"excess",
"exhale",
"exit",
"exotic",
"exquisite",
"extra",
"exult",
"fabrics",
"factual",
"fading",
"fainted",
"faked",
"fall",
"family",
"fancy",
"farming",
"fatal",
"faulty",
"fawns",
"faxed",
"fazed",
"feast",
"february",
"federal",
"feel",
"feline",
"females",
"fences",
"ferry",
"festival",
"fetches",
"fever",
"fewest",
"fiat",
"fibula",
"fictional",
"fidget",
"fierce",
"fifteen",
"fight",
"films",
"firm",
"fishing",
"fitting",
"five",
"fixate",
"fizzle",
"fleet",
"flippant",
"flying",
"foamy",
"focus",
"foes",
"foggy",
"foiled",
"folding",
"fonts",
"foolish",
"fossil",
"fountain",
"fowls",
"foxes",
"foyer",
"framed",
"friendly",
"frown",
"fruit",
"frying",
"fudge",
"fuel",
"fugitive",
"fully",
"fuming",
"fungal",
"furnished",
"fuselage",
"future",
"fuzzy",
"gables",
"gadget",
"gags",
"gained",
"galaxy",
"gambit",
"gang",
"gasp",
"gather",
"gauze",
"gave",
"gawk",
"gaze",
"gearbox",
"gecko",
"geek",
"gels",
"gemstone",
"general",
"geometry",
"germs",
"gesture",
"getting",
"geyser",
"ghetto",
"ghost",
"giant",
"giddy",
"gifts",
"gigantic",
"gills",
"gimmick",
"ginger",
"girth",
"giving",
"glass",
"gleeful",
"glide",
"gnaw",
"gnome",
"goat",
"goblet",
"godfather",
"goes",
"goggles",
"going",
"goldfish",
"gone",
"goodbye",
"gopher",
"gorilla",
"gossip",
"gotten",
"gourmet",
"governing",
"gown",
"greater",
"grunt",
"guarded",
"guest",
"guide",
"gulp",
"gumball",
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