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Now issues a warning when 2048-bit moduli are encountered.

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This commit is contained in:
Joe Testa
2023-02-06 16:27:30 -05:00
parent f9e00b6f2d
commit c9dc9a9c10
17 changed files with 93 additions and 42 deletions
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9
test/docker/expected_results/openssh_8.0p1_test2.txt
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@ -19,11 +19,14 @@
`- [info] available since OpenSSH 5.7, Dropbear SSH 2013.62
(kex) ecdh-sha2-nistp521 -- [fail] using weak elliptic curves
`- [info] available since OpenSSH 5.7, Dropbear SSH 2013.62
(kex) diffie-hellman-group-exchange-sha256 (2048-bit) -- [info] available since OpenSSH 4.4
(kex) diffie-hellman-group-exchange-sha256 (2048-bit) -- [warn] 2048-bit modulus only provides 112-bits of symmetric strength
`- [info] available since OpenSSH 4.4
(kex) diffie-hellman-group16-sha512 -- [info] available since OpenSSH 7.3, Dropbear SSH 2016.73
(kex) diffie-hellman-group18-sha512 -- [info] available since OpenSSH 7.3
(kex) diffie-hellman-group14-sha256 -- [info] available since OpenSSH 7.3, Dropbear SSH 2016.73
(kex) diffie-hellman-group14-sha256 -- [warn] 2048-bit modulus only provides 112-bits of symmetric strength
`- [info] available since OpenSSH 7.3, Dropbear SSH 2016.73
(kex) diffie-hellman-group14-sha1 -- [warn] using weak hashing algorithm
 `- [warn] 2048-bit modulus only provides 112-bits of symmetric strength
`- [info] available since OpenSSH 3.9, Dropbear SSH 0.53
# host-key algorithms
@ -64,12 +67,14 @@
(fin) ssh-ed25519: SHA256:UrnXIVH+7dlw8UqYocl48yUEcKrthGDQG2CPCgp7MxU
# algorithm recommendations (for OpenSSH 8.0)
(rec) !diffie-hellman-group-exchange-sha256 -- kex algorithm to change (increase modulus size to 3072 bits or larger) 
(rec) -ecdh-sha2-nistp256 -- kex algorithm to remove 
(rec) -ecdh-sha2-nistp384 -- kex algorithm to remove 
(rec) -ecdh-sha2-nistp521 -- kex algorithm to remove 
(rec) +rsa-sha2-256 -- key algorithm to append 
(rec) +rsa-sha2-512 -- key algorithm to append 
(rec) -diffie-hellman-group14-sha1 -- kex algorithm to remove 
(rec) -diffie-hellman-group14-sha256 -- kex algorithm to remove 
(rec) -hmac-sha1 -- mac algorithm to remove 
(rec) -hmac-sha1-etm@openssh.com -- mac algorithm to remove 
(rec) -hmac-sha2-256 -- mac algorithm to remove