\dMdZddlZddlZddlmZmZmZddlm Z ddl m Z ddl m Z ddlmZmZmZddlmZdd lmZmZmZdd lmZdd lmZdd lmZdd lmZddl m!Z!eZ"dZ#dZ$GddZ%e eGdde%Z&e eGddZ'dZ(e eGdde%e!Z)GddZ*GddZ+dS)zE An implementation of the OpenSSH known_hosts database. @since: 8.2 N)Error a2b_base64 b2a_base64)closing)sha1) implementer)HostKeyChanged InvalidEntryUserRejectedKey)IKnownHostEntry) BadKeyErrorFingerprintFormatsKey)defer)Logger) nativeString) secureRandom) FancyEqMixincDt|S)z Encode a binary string as base64 with no trailing newline. @param s: The string to encode. @type s: L{bytes} @return: The base64-encoded string. @rtype: L{bytes} )rstrip)ss ?lib/python3.11/site-packages/twisted/conch/client/knownhosts.py _b64encoder s a==    cf|dd}t|dkrt|\}}}|dd}t|dkr|\}}|d}n |d}d}t jt |}||||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). @type string: L{bytes} @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. @rtype: L{tuple} N r)splitlenr rstripr fromStringr) stringelements hostnameskeyType keyAndCommentsplitkey keyStringcommentkeys r_extractCommonr--s||D!$$H 8}}nn(0%Iw ""4++H 8}}% 7..''QK  .I.. / /C gsG ++rceZdZdZdZdZdS) _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} c0||_||_||_dSN)r' publicKeyr+)selfr'r2r+s r__init__z_BaseEntry.__init__Xs " rc|j|kS)a Check to see if this entry matches a given key object. @param keyObject: A public key object to check. @type keyObject: L{Key} @return: C{True} if this entry's key matches C{keyObject}, C{False} otherwise. @rtype: L{bool} )r2)r3 keyObjects r matchesKeyz_BaseEntry.matchesKey]s~**rN)__name__ __module__ __qualname____doc__r4r7rrr/r/Is<   + + + + +rr/cDeZdZdZfdZedZdZdZxZ 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. @type _hostnames: L{list} of L{bytes} c\||_t|||dSr1) _hostnamessuperr4)r3r&r'r2r+ __class__s rr4zPlainEntry.__init__us,# )W55555rcpt|\}}}}||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". @type string: L{bytes} @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} ,)r-r )clsr$r&r'r,r+r3s rr#zPlainEntry.fromStringys@0,:&+A+A( 7Cs9??4(('3@@ rcht|tr|d}||jvS)aT Check to see if this entry matches a given hostname. @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} utf-8) isinstancestrencoder@r3hostnames r matchesHostzPlainEntry.matchesHosts4 h $ $ 0w//H4?**rcd|j|jt|jg}|j||jd|S)a 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. @rtype: L{bytes} rDN )joinr@r'rr2blobr+appendr3fieldss rtoStringzPlainEntry.toStringsj IIdo & & L t~**,, - -  < # MM$, ' ' 'yy   r) r8r9r:r;r4 classmethodr#rMrU __classcell__rBs@rr>r>ks{66666[6+++ !!!!!!!rr>c*eZdZdZdZdZdZdZdS) UnparsedEntryz L{UnparsedEntry} is an entry in a L{KnownHostsFile} which can't actually be parsed; therefore it matches no keys and no hosts. c||_dS)zv Create an unparsed entry from a line in a known_hosts file which cannot otherwise be parsed. N)_string)r3r$s rr4zUnparsedEntry.__init__s  rcdSz' Always returns False. Fr<rKs rrMzUnparsedEntry.matchesHost urcdSr^r<)r3r,s rr7zUnparsedEntry.matchesKeyr_rc6|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"r3s rrUzUnparsedEntry.toStrings|""5)))rN)r8r9r:r;r4rMr7rUr<rrrZrZsZ   *****rrZctj|t}t|tr|d}|||S)z Return the SHA-1 HMAC hash of the given key and string. @param key: The HMAC key. @type key: L{bytes} @param string: The string to be hashed. @type string: L{bytes} @return: The keyed hash value. @rtype: L{bytes} ) digestmodrG)hmacHMACrrHrIrJupdatedigest)r,r$hashs r _hmacedStringrjs[ 9SD ) ) )D&#(w''KK ;;==rcLeZdZdZdZdZfdZedZdZ dZ xZ 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'r2r+cj||_||_t|||dSr1)rmrnrAr4)r3hostSalthostHashr'r2r+rBs rr4zHashedEntry.__init__s3!! )W55555rc*t|\}}}}|t|jdd}t|dkrt |\}}|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. @type string: L{bytes} @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)r-r!MAGICr r r) rEr$stuffr'r,r+ saltAndHashrprqr3s rr#zHashedEntry.fromStrings.(6f'='=$wWC NN,,-33D99 {  q .. ((s:h''H)=)=wWUU rc\tjt|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} )recompare_digestrjrmrnrKs rrMzHashedEntry.matchesHost's," $.( 3 3T^   rcL|jdt|jt|jgz|jt|jg}|j| |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} rsNrO) rtrPrrmrnr'r2rQr+rRrSs rrUzHashedEntry.toString8s JiiDN33Z5O5OPQQ R L t~**,, - -   < # MM$, ' ' 'yy   r) r8r9r:r;rtcompareAttributesr4rVr#rMrUrWrXs@rrlrls   EU66666 [<   "!!!!!!!rrlcbeZdZdZdZedZdZdZdZ dZ dZ e d Z 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__}. c0g|_||_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)r3savePaths rr4zKnownHostsFile.__init__]s ! rc|jS)z< @see: C{savePath} parameter of L{__init__} )rrbs rrzKnownHostsFile.savePathks ~rc#K|jD]}|V|jrdS |j}n#t$rYdSwxYw|5|D]} |t jrt |}nt|}n,#tttf$rt|}YnwxYw|V ddddS#1swxYwYdS)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)r~rropenOSError startswithrlrtr#r> DecodeErrorr r rZ)r3entryfplines r iterentrieszKnownHostsFile.iterentriesrsr[  EKKKK =  F $$&&BB    FF     0{'899< + 6 6t < < * 5 5d ; ;#\;?000)$//EEE0                    sF5 AAC"AB#"C"#&C  C" C  C""C&)C&c`t|t|j D]w\}}||r]|j|kr@||rdS|dkrd}d}n |dz}|j}t|||xdS)a Check for an entry with matching hostname and key. @param hostname: A hostname or IP address literal to check for. @type hostname: L{bytes} @param key: The public key to check for. @type key: L{Key} @return: C{True} if the given hostname and key are present in this file, C{False} if they are not. @rtype: L{bool} @raise HostKeyChanged: if the host key found for the given hostname does not match the given key. TrNrF) enumeraterr!r~rMr'sshTyper7rr )r3rLr,lineidxrrpaths r hasHostKeyzKnownHostsFile.hasHostKeys"((8(8(:(:S=M=M.gotHasKey..promptResponsesQ0#666C000 '-///rECECDSAzThe authenticity of host 'z (z)' can't be established. z key fingerprint is SHA256:)formatz9. Are you sure you want to continue connecting (yes/no)? )rwarntyperrr fingerprintr SHA256_BASE64promptrJsysgetdefaultencoding addCallback) resultrkeytyperproceedrLrr,r3uis r gotHasKeyz/KnownHostsFile.verifyHostKey..gotHasKeysY' ;r3// GGG88::::|B'7'7'7'79 OOB,,,IIKKK 00000000((**d??%G%X....$R((((/A/OPPPP ))FMM#2H2J2J$K$KLL**>:::r)rexecuterr)r3rrLrr,hhkrs````` r verifyHostKeyzKnownHostsFile.verifyHostKeys`(mDOXs;;( ;( ;( ;( ;( ;( ;( ;( ;( ;Ty)))rctd}|}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)rrrlrjr~rR)r3rLr,saltr'rs rrzKnownHostsFile.addHostKeysX"B++--D-h"?"?#tTT 5!!! rc|j}|s||jrd}nd}|j|5}|jrA|dd|jDdzg|_dddn #1swxYwYd|_dS)zM Save this L{KnownHostsFile} to the path it was loaded from. wbabrc6g|]}|Sr<)rU).0rs r z'KnownHostsFile.save..s"JJJU 0 0JJJrNF) rparentisdirmakedirsrrr~writerP)r3pmode hostsFileObjs rrzKnownHostsFile.save s N ! ! # #wwyy  JJLLL = DDD ^  & & !,{ !""JJJJdkJJJKKeS!  ! ! ! ! ! ! ! ! ! ! ! ! ! ! !  s(A B==CCc*||}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. @type path: L{FilePath} @return: A L{KnownHostsFile} initialized with entries from C{path}. @rtype: L{KnownHostsFile} F)r)rEr knownHostss rfromPathzKnownHostsFile.fromPath sSYY # rN)r8r9r:r;r4propertyrrrrrrrVrr<rrr|r|Ls   X >B@*@*@*D.*[rr|c$eZdZdZdZdZdZdS) ConsoleUIz A UI object that can ask true/false questions and post notifications on the console, to be used during key verification. c||_dS)aA @param opener: A no-argument callable which should open a console binary-mode file-like object to be used for reading and writing. This initializes the C{opener} attribute. @type opener: callable taking no arguments and returning a read/write file-like object N)opener)r3rs rr4zConsoleUI.__init__9s rcdtjd}fd}||S)a Write the given text as a prompt to the console output, then read a result from the console input. @param text: Something to present to a user to solicit a yes or no response. @type text: L{bytes} @return: a L{Deferred} which fires with L{True} when the user answers 'yes' and L{False} when the user answers 'no'. It may errback if there were any I/O errors. Nczt5}| |}|dkr ddddS|dkr ddddS|dv#1swxYwYdS)NTsyessnoFsPlease type 'yes' or 'no': )rrrreadlinerlower)ignoredfanswerr3texts rbodyzConsoleUI.prompt..bodyRs.'' @1 @ZZ\\//117799F''# @ @ @ @ @ @ @ @  5$ @ @ @ @ @ @ @ @ >???@ @ @ @ @ @ @ @ @ @ @sAB0B0B00B47B4)rsucceedr)r3rdrs`` rrzConsoleUI.promptCsM M$   @ @ @ @ @ @}}T"""rc t|5}||ddddS#1swxYwYdS#t$rtdYdSwxYw)z Notify the user (non-interactively) of the provided text, by writing it to the console. @param text: Some information the user is to be made aware of. @type text: L{bytes} NzFailed to write to console)rrr Exceptionlogfailure)r3rrs rrzConsoleUI.warn`s 6'' 1                    6 6 6 KK4 5 5 5 5 5 5 6s3!AA AA  A A A$A;:A;N)r8r9r:r;r4rrr<rrrr3sK ###: 6 6 6 6 6rr),r;rerbinasciirrrr contextlibrhashlibrzope.interfacertwisted.conch.errorr r r twisted.conch.interfacesr twisted.conch.ssh.keysr rrtwisted.internetrtwisted.loggerrtwisted.python.compatrtwisted.python.randbytesrtwisted.python.utilrrrr-r/r>rZrjrlr|rr<rrrs  AAAAAAAAAA&&&&&&MMMMMMMMMM444444GGGGGGGGGG""""""!!!!!!......111111,,,,,, fhh ! ! !,,,8++++++++D _I!I!I!I!I!I!I!I!X _!*!*!*!*!*!*!*!*H( _W!W!W!W!W!*lW!W!W!tddddddddN96969696969696969696r