U AcjO@sdZddlmZddlZddlZddlmZmZm Z ddl m Z ddl m Z ddlmZmZmZmZddlmZdd lmZmZmZdd lmZdd lmZmZmZdd lm Z dd l!m"Z"ddl#m$Z$ddl%m&Z&ddl'm(Z(ddl)m*Z*ddl+m,Z,e$Z-dddddZ.dddddZ/GdddZ0eeGddde0Z1eeGdd d Z2dd!dd"d#d$Z3eeGd%d&d&e0e,Z4Gd'd(d(Z5Gd)d*d*Z6dS)+zE An implementation of the OpenSSH known_hosts database. @since: 8.2 ) annotationsN)Error a2b_base64 b2a_base64)closing)sha1)IOCallableIterableLiteral) implementer)HostKeyChanged InvalidEntryUserRejectedKey)IKnownHostEntry) BadKeyErrorFingerprintFormatsKey)defer)Deferred)Logger) nativeString)FilePath) secureRandom) FancyEqMixinbytes)sreturncCs t|S)z Encode a binary string as base64 with no trailing newline. @param s: The string to encode. @return: The base64-encoded string. )rstrip)rrC/tmp/pip-unpacked-wheel-nrvc_22y/twisted/conch/client/knownhosts.py _b64encode$sr!z&tuple[bytes, bytes, Key, bytes | None]stringrc Csz|dd}t|dkrt|\}}}|dd}t|dkrT|\}}|d}n |d}d}tt|}||||fS)a Extract common elements of base64 keys from an entry in a hosts file. @param string: A known hosts file entry (a single line). @return: a 4-tuple of hostname data (L{bytes}), ssh key type (L{bytes}), key (L{Key}), and comment (L{bytes} or L{None}). The hostname data is simply the beginning of the line up to the first occurrence of whitespace. N r)splitlenrrstripr fromStringr) r#elements hostnameskeyTypeZ keyAndCommentZsplitkeyZ keyStringcommentkeyrrr _extractCommon/s      r1c@s4eZdZdZdddddddZdd d d d Zd S) _BaseEntrya Abstract base of both hashed and non-hashed entry objects, since they represent keys and key types the same way. @ivar keyType: The type of the key; either ssh-dss or ssh-rsa. @type keyType: L{bytes} @ivar publicKey: The server public key indicated by this line. @type publicKey: L{twisted.conch.ssh.keys.Key} @ivar comment: Trailing garbage after the key line. @type comment: L{bytes} or C{None} rr bytes | NoneNone)r. publicKeyr/rcCs||_||_||_dSN)r.r5r/)selfr.r5r/rrr __init__Xsz_BaseEntry.__init__bool) keyObjectrcCs|j|k}|S)z Check to see if this entry matches a given key object. @param keyObject: A public key object to check. @return: C{True} if this entry's key matches C{keyObject}, C{False} otherwise. )r5)r7r:resultrrr matchesKey]s z_BaseEntry.matchesKeyN)__name__ __module__ __qualname____doc__r8r<rrrr r2Isr2cs^eZdZdZdddddfdd Zeddd d d Zd d dddZddddZZ S) PlainEntryz A L{PlainEntry} is a representation of a plain-text entry in a known_hosts file. @ivar _hostnames: the list of all host-names associated with this entry. z list[bytes]rrr3)r-r.r5r/cs||_t|||dSr6) _hostnamessuperr8)r7r-r.r5r/ __class__rr r8sszPlainEntry.__init__r"cCs(t|\}}}}||d|||}|S)a Parse a plain-text entry in a known_hosts file, and return a corresponding L{PlainEntry}. @param string: a space-separated string formatted like "hostname key-type base64-key-data comment". @raise DecodeError: if the key is not valid encoded as valid base64. @raise InvalidEntry: if the entry does not have the right number of elements and is therefore invalid. @raise BadKeyError: if the key, once decoded from base64, is not actually an SSH key. @return: an IKnownHostEntry representing the hostname and key in the input line. @rtype: L{PlainEntry} ,)r1r()clsr#r-r.r0r/r7rrr r+}szPlainEntry.fromString bytes | strr9hostnamercCst|tr|d}||jkS)a Check to see if this entry matches a given hostname. @param hostname: A hostname or IP address literal to check against this entry. @return: C{True} if this entry is for the given hostname or IP address, C{False} otherwise. utf-8) isinstancestrencoderBr7rJrrr matchesHosts  zPlainEntry.matchesHostrcCs>d|j|jt|jg}|jdk r4||jd|S)z Implement L{IKnownHostEntry.toString} by recording the comma-separated hostnames, key type, and base-64 encoded key. @return: The string representation of this entry, with unhashed hostname information. rFN )joinrBr.r!r5blobr/appendr7fieldsrrr toStrings    zPlainEntry.toString) r=r>r?r@r8 classmethodr+rPrX __classcell__rrrDr rAjs  rAc@s\eZdZUdZdZded<dddddZdd d d d Zd d dddZddddZ dS) UnparsedEntryz L{UnparsedEntry} is an entry in a L{KnownHostsFile} which can't actually be parsed; therefore it matches no keys and no hosts. Nr4r.rr"cCs ||_dS)zv Create an unparsed entry from a line in a known_hosts file which cannot otherwise be parsed. N)_string)r7r#rrr r8szUnparsedEntry.__init__r9rIcCsdSz' Always returns False. FrrOrrr rPszUnparsedEntry.matchesHostr)r0rcCsdSr]r)r7r0rrr r<szUnparsedEntry.matchesKeyrQcCs |jdS)a Returns the input line, without its newline if one was given. @return: The string representation of this entry, almost exactly as was used to initialize this entry but without a trailing newline. @rtype: L{bytes} r')r\r*r7rrr rXszUnparsedEntry.toString) r=r>r?r@r.__annotations__r8rPr<rXrrrr r[s  r[rH)r0r#rcCs4tj|td}t|tr"|d}|||S)z Return the SHA-1 HMAC hash of the given key and string. @param key: The HMAC key. @param string: The string to be hashed. @return: The keyed hash value. ) digestmodrK)hmacHMACrrLrMrNupdatedigest)r0r#hashrrr _hmacedStrings    rfcsjeZdZdZdZdZdddddddfd d Zeddd d d ZdddddZ ddddZ Z S) HashedEntrya A L{HashedEntry} is a representation of an entry in a known_hosts file where the hostname has been hashed and salted. @ivar _hostSalt: the salt to combine with a hostname for hashing. @ivar _hostHash: the hashed representation of the hostname. @cvar MAGIC: the 'hash magic' string used to identify a hashed line in a known_hosts file as opposed to a plaintext one. s|1|) _hostSalt _hostHashr.r5r/rrr3r4)hostSalthostHashr.r5r/rcs ||_||_t|||dSr6)rhrirCr8)r7rjrkr.r5r/rDrr r8szHashedEntry.__init__r"c Cs^t|\}}}}|t|jdd}t|dkr:t|\}}|t|t||||} | S)a Load a hashed entry from a string representing a line in a known_hosts file. @param string: A complete single line from a I{known_hosts} file, formatted as defined by OpenSSH. @raise DecodeError: if the key, the hostname, or the is not valid encoded as valid base64 @raise InvalidEntry: if the entry does not have the right number of elements and is therefore invalid, or the host/hash portion contains more items than just the host and hash. @raise BadKeyError: if the key, once decoded from base64, is not actually an SSH key. @return: The newly created L{HashedEntry} instance, initialized with the information from C{string}. N|r$)r1r)MAGICr(rr) rGr#stuffr.r0r/Z saltAndHashrjrkr7rrr r+ s zHashedEntry.fromStringr9rIcCstt|j||jS)a Implement L{IKnownHostEntry.matchesHost} to compare the hash of the input to the stored hash. @param hostname: A hostname or IP address literal to check against this entry. @type hostname: L{bytes} @return: C{True} if this entry is for the given hostname or IP address, C{False} otherwise. @rtype: L{bool} )racompare_digestrfrhrirOrrr rP+s  zHashedEntry.matchesHostrQcCsR|jdt|jt|jg|jt|jg}|jdk rH| |jd|S)z Implement L{IKnownHostEntry.toString} by base64-encoding the salt, host hash, and key. @return: The string representation of this entry, with the hostname part hashed. @rtype: L{bytes} rlNrR) rmrSr!rhrir.r5rTr/rUrVrrr rX<s    zHashedEntry.toString) r=r>r?r@rmZcompareAttributesr8rYr+rPrXrZrrrDr rgs  rgc@seZdZdZdddddZedddd Zd dd d Zd dddddZdd d dddddZ d dddddZ ddddZ e dddddZ d S)!KnownHostsFileaz A structured representation of an OpenSSH-format ~/.ssh/known_hosts file. @ivar _added: A list of L{IKnownHostEntry} providers which have been added to this instance in memory but not yet saved. @ivar _clobber: A flag indicating whether the current contents of the save path will be disregarded and potentially overwritten or not. If C{True}, this will be done. If C{False}, entries in the save path will be read and new entries will be saved by appending rather than overwriting. @type _clobber: L{bool} @ivar _savePath: See C{savePath} parameter of L{__init__}. z FilePath[str]r4)savePathrcCsg|_||_d|_dS)a$ Create a new, empty KnownHostsFile. Unless you want to erase the current contents of C{savePath}, you want to use L{KnownHostsFile.fromPath} instead. @param savePath: The L{FilePath} to which to save new entries. @type savePath: L{FilePath} TN)_added _savePath_clobber)r7rqrrr r8as zKnownHostsFile.__init__rQcCs|jS)z< @see: C{savePath} parameter of L{__init__} )rsr^rrr rqoszKnownHostsFile.savePathzIterable[IKnownHostEntry]c cs|jD] }|Vq|jrdSz|j}Wntk r@YdSX|`|D]T}z&|tjrjt|}n t |}Wn"t t t fk rt |}YnX|VqLW5QRXdS)aK Iterate over the host entries in this file. @return: An iterable the elements of which provide L{IKnownHostEntry}. There is an element for each entry in the file as well as an element for each added but not yet saved entry. @rtype: iterable of L{IKnownHostEntry} providers N)rrrtrsopenOSError startswithrgrmr+rA DecodeErrorrrr[)r7entryfplinerrr iterentriesvs"   zKnownHostsFile.iterentriesrrr9)rJr0rcCsxt|t|j D]\\}}|j|kr||r||rFdS|dkrXd}d}n|d}|j}t |||qdS)a Check for an entry with matching hostname and key. @param hostname: A hostname or IP address literal to check for. @param key: The public key to check for. @return: C{True} if the given hostname and key are present in this file, C{False} if they are not. @raise HostKeyChanged: if the host key found for the given hostname does not match the given key. TrNr&F) enumerater|r)rrr.sshTyperPr<rsr )r7rJr0Zlineidxryr{pathrrr hasHostKeys zKnownHostsFile.hasHostKey ConsoleUIDeferred[bool])uirJipr0rcs6tj}dddfdd }||S)a Verify the given host key for the given IP and host, asking for confirmation from, and notifying, the given UI about changes to this file. @param ui: The user interface to request an IP address from. @param hostname: The hostname that the user requested to connect to. @param ip: The string representation of the IP address that is actually being connected to. @param key: The public key of the server. @return: a L{Deferred} that fires with True when the key has been verified, or fires with an errback when the key either cannot be verified or has changed. @rtype: L{Deferred} r9zbool | Deferred[bool])r;rcs|rRsNddd}|d|Sdddfdd }}|d krd }d tt|jt j d f} |t }||SdS) NzWarning: Permanently added the z host key for IP address 'z' to the list of known hosts. rKr9)responsercs2|r(|StdSr6) addHostKeysaver)r)rJrr0r7rr promptResponses   zGKnownHostsFile.verifyHostKey..gotHasKey..promptResponseZECZECDSAzThe authenticity of host '%s (%s)' can't be established. %s key fingerprint is SHA256:%s. Are you sure you want to continue connecting (yes/no)? )format)rtypedecodewarnrNrrr fingerprintrZ SHA256_BASE64promptsysgetdefaultencoding addCallback)r;Z addMessagerZkeytyperproceedrJrr0r7rrr gotHasKeys,     z/KnownHostsFile.verifyHostKey..gotHasKey)rexecuterr)r7rrJrr0Zhhkrrrr verifyHostKeys+zKnownHostsFile.verifyHostKeyrgcCs6td}|}t|t||||d}|j||S)a Add a new L{HashedEntry} to the key database. Note that you still need to call L{KnownHostsFile.save} if you wish these changes to be persisted. @param hostname: A hostname or IP address literal to associate with the new entry. @type hostname: L{bytes} @param key: The public key to associate with the new entry. @type key: L{Key} @return: The L{HashedEntry} that was added. @rtype: L{HashedEntry} N)rr~rgrfrrrU)r7rJr0Zsaltr.ryrrr rs  zKnownHostsFile.addHostKeyc Csv|j}|s||jr$dnd}|j|2}|jrb|ddd|jDdg|_W5QRXd|_dS)zM Save this L{KnownHostsFile} to the path it was loaded from. war'cSsg|] }|qSr)rX).0ryrrr sz'KnownHostsFile.save..FN) rsparentisdirmakedirsrtrurrwriterS)r7pmodeZ hostsFileObjrrr rs zKnownHostsFile.save)rrcCs||}d|_|S)a Create a new L{KnownHostsFile}, potentially reading existing known hosts information from the given file. @param path: A path object to use for both reading contents from and later saving to. If no file exists at this path, it is not an error; a L{KnownHostsFile} with no entries is returned. @return: A L{KnownHostsFile} initialized with entries from C{path}. F)rt)rGrZ knownHostsrrr fromPath s zKnownHostsFile.fromPathN)r=r>r?r@r8propertyrqr|rrrrrYrrrrr rpPsErpc@s@eZdZdZdddddZddd d d Zddd d d ZdS)rz A UI object that can ask true/false questions and post notifications on the console, to be used during key verification. zCallable[[], IO[bytes]]r4)openerrcCs ||_dS)aA @param opener: A no-argument callable which should open a console binary-mode file-like object to be used for reading and writing. 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Nc sntX}||}|dkr>W5QRdS|dkrTW5QRdS|dqW5QRXdS)NsyesT>noFsPlease type 'yes' or 'no': )rrrreadlinerlower)ZignoredfZanswerr7rrr bodyPs zConsoleUI.prompt..body)rZsucceedr)r7rdrrrr rAs  zConsoleUI.promptc CsJz&t|}||W5QRXWntk rDtdYnXdS)z Notify the user (non-interactively) of the provided text, by writing it to the console. @param text: Some information the user is to be made aware of. zFailed to write to consoleN)rrr ExceptionlogZfailure)r7rrrrr r^s zConsoleUI.warnN)r=r>r?r@r8rrrrrr r1s r)7r@ __future__rrarbinasciirrxrr contextlibrhashlibrtypingrr r r Zzope.interfacer Ztwisted.conch.errorr rrZtwisted.conch.interfacesrZtwisted.conch.ssh.keysrrrZtwisted.internetrZtwisted.internet.deferrZtwisted.loggerrZtwisted.python.compatrZtwisted.python.filepathrZtwisted.python.randbytesrZtwisted.python.utilrrr!r1r2rAr[rfrgrprrrrr s@             !L&`b