JFIF$        dd7 

Viewing File: /usr/lib/python3.9/site-packages/dns/dnssecalgs/eddsa.py

from typing import Type

from cryptography.hazmat.primitives import serialization
from cryptography.hazmat.primitives.asymmetric import ed448, ed25519

from dns.dnssecalgs.cryptography import CryptographyPrivateKey, CryptographyPublicKey
from dns.dnssectypes import Algorithm
from dns.rdtypes.ANY.DNSKEY import DNSKEY


class PublicEDDSA(CryptographyPublicKey):
    def verify(self, signature: bytes, data: bytes) -> None:
        self.key.verify(signature, data)

    def encode_key_bytes(self) -> bytes:
        """Encode a public key per RFC 8080, section 3."""
        return self.key.public_bytes(
            encoding=serialization.Encoding.Raw, format=serialization.PublicFormat.Raw
        )

    @classmethod
    def from_dnskey(cls, key: DNSKEY) -> "PublicEDDSA":
        cls._ensure_algorithm_key_combination(key)
        return cls(
            key=cls.key_cls.from_public_bytes(key.key),
        )


class PrivateEDDSA(CryptographyPrivateKey):
    public_cls: Type[PublicEDDSA]

    def sign(self, data: bytes, verify: bool = False) -> bytes:
        """Sign using a private key per RFC 8080, section 4."""
        signature = self.key.sign(data)
        if verify:
            self.public_key().verify(signature, data)
        return signature

    @classmethod
    def generate(cls) -> "PrivateEDDSA":
        return cls(key=cls.key_cls.generate())


class PublicED25519(PublicEDDSA):
    key: ed25519.Ed25519PublicKey
    key_cls = ed25519.Ed25519PublicKey
    algorithm = Algorithm.ED25519


class PrivateED25519(PrivateEDDSA):
    key: ed25519.Ed25519PrivateKey
    key_cls = ed25519.Ed25519PrivateKey
    public_cls = PublicED25519


class PublicED448(PublicEDDSA):
    key: ed448.Ed448PublicKey
    key_cls = ed448.Ed448PublicKey
    algorithm = Algorithm.ED448


class PrivateED448(PrivateEDDSA):
    key: ed448.Ed448PrivateKey
    key_cls = ed448.Ed448PrivateKey
    public_cls = PublicED448
Back to Directory  nL+D550H?Mx ,D"v]qv;6*Zqn)ZP0!1 A "#a$2Qr D8 a Ri[f\mIykIw0cuFcRı?lO7к_f˓[C$殷WF<_W ԣsKcëIzyQy/_LKℂ;C",pFA:/]=H  ~,ls/9ć:[=/#f;)x{ٛEQ )~ =𘙲r*2~ a _V=' kumFD}KYYC)({ *g&f`툪ry`=^cJ.I](*`wq1dđ#̩͑0;H]u搂@:~וKL Nsh}OIR*8:2 !lDJVo(3=M(zȰ+i*NAr6KnSl)!JJӁ* %݉?|D}d5:eP0R;{$X'xF@.ÊB {,WJuQɲRI;9QE琯62fT.DUJ;*cP A\ILNj!J۱+O\͔]ޒS߼Jȧc%ANolՎprULZԛerE2=XDXgVQeӓk yP7U*omQIs,K`)6\G3t?pgjrmۛجwluGtfh9uyP0D;Uڽ"OXlif$)&|ML0Zrm1[HXPlPR0'G=i2N+0e2]]9VTPO׮7h(F*癈'=QVZDF,d߬~TX G[`le69CR(!S2!P <0x<!1AQ "Raq02Br#SCTb ?Ζ"]mH5WR7k.ۛ!}Q~+yԏz|@T20S~Kek *zFf^2X*(@8r?CIuI|֓>^ExLgNUY+{.RѪ τV׸YTD I62'8Y27'\TP.6d&˦@Vqi|8-OΕ]ʔ U=TL8=;6c| !qfF3aů&~$l}'NWUs$Uk^SV:U# 6w++s&r+nڐ{@29 gL u"TÙM=6(^"7r}=6YݾlCuhquympǦ GjhsǜNlɻ}o7#S6aw4!OSrD57%|?x>L |/nD6?/8w#[)L7+6〼T ATg!%5MmZ/c-{1_Je"|^$'O&ޱմTrb$w)R$& N1EtdU3Uȉ1pM"N*(DNyd96.(jQ)X 5cQɎMyW?Q*!R>6=7)Xj5`J]e8%t!+'!1Q5 !1 AQaqё#2"0BRb?Gt^## .llQT $v,,m㵜5ubV =sY+@d{N! dnO<.-B;_wJt6;QJd.Qc%p{ 1,sNDdFHI0ГoXшe黅XۢF:)[FGXƹ/w_cMeD,ʡcc.WDtA$j@:) -# u c1<@ۗ9F)KJ-hpP]_x[qBlbpʖw q"LFGdƶ*s+ډ_Zc"?%t[IP 6J]#=ɺVvvCGsGh1 >)6|ey?Lӣm,4GWUi`]uJVoVDG< SB6ϏQ@ TiUlyOU0kfV~~}SZ@*WUUi##; s/[=!7}"WN]'(L! ~y5g9T̅JkbM' +s:S +B)v@Mj e Cf jE 0Y\QnzG1д~Wo{T9?`Rmyhsy3!HAD]mc1~2LSu7xT;j$`}4->L#vzŏILS ֭T{rjGKC;bpU=-`BsK.SFw4Mq]ZdHS0)tLg