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``` | ||
The library we are using to generate SSH keys implements RSA poorly. The two | ||
randomly selected prime numbers (p and q) are very close to one another. Such | ||
bad keys can easily be broken with Fermat's factorization method. | ||
Also, SSH root login is enabled. | ||
<https://github.com/murtaza-u/zet/tree/main/20220808171808> | ||
``` | ||
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||
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||
``` | ||
to determine the size of rsa key in bits we can use | ||
┌──(alienx㉿alienX)-[~/Desktop/MACHINES/RSA-THM] | ||
└─$ ssh-keygen -lf id_rsa.pub | ||
4096 SHA256:DIqTDIhboydTh2QU6i58JP+5aDRnLBPT8GwVun1n0Co no comment (RSA) | ||
OR | ||
command: openssl rsa -in file_rsa.pum(pem) -text -noout | ||
n=960343778775549488806716229688022562692463185460664314559819511657255292180827209174624059690060629715513180527734160798185034958883650709727032190772084959116259664047922715427522089353727952666824433207585440395813418471678775572995422248008108462980790558476993362919639516120538362516927622315187274971734081435230079153205750751020642956757117030852053008146976560531583447003355135460359928857010196241497604249151374353653491684214813678136396641706949128453526566651123162138806898116027920918258136713427376775618725136451984896300788465604914741872970173868541940675400325006679662030787570986695243903017923121105483935334289783830664260722704673471688470355268898058414366742781725580377180144541978809005281731232604162936015554289274471523038666760994260315829982230640668811250447030003462317740603204577123985618718687833015332554488836087898084147236609893032121172292368637672349405254772581742883431648376052937332995630141793928654990078967475194724151821689117026010445305375748604757116271353498403318409547515058838447618537811182917198454172161072247021099572638700461507432831248944781465511414308770376182766366160748136532693805002316728842876519091399408672222673058844554058431161474308624683491225222383 | ||
e=65537 | ||
``` |