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Revert "xrcp: use SHA3-256 in hybrid key agreement (#1302)"

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This reverts commit 67d38090ed.
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Evgeny Poberezkin committed 2024-09-11 18:45:44 +01:00
1 parent 3b50e1fb7d
commit 62133ceb24
2 files changed
+4 -4
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protocol/xrcp.md
+2 -2
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@@ -250,7 +250,7 @@ In pseudo-code:
```
// session 1
hostHelloSecret(1) = dhSecret(1)
sessionSecret(1) = sha3-256(dhSecret(1) || kemSecret(1)) // to encrypt session 1 data, incl. controller hello
sessionSecret(1) = sha256(dhSecret(1) || kemSecret(1)) // to encrypt session 1 data, incl. controller hello
dhSecret(1) = dh(hostHelloDhKey(1), controllerInvitationDhKey(1))
kemCiphertext(1) = enc(kemSecret(1), kemEncKey(1))
// kemEncKey is included in host HELLO, kemCiphertext - in controller HELLO
@@ -262,7 +262,7 @@ dhSecret(n') = dh(hostHelloDhKey(n - 1), controllerDhKey(n))
// session n
hostHelloSecret(n) = dhSecret(n)
sessionSecret(n) = sha3-256(dhSecret(n) || kemSecret(n)) // to encrypt session n data, incl. controller hello
sessionSecret(n) = sha256(dhSecret(n) || kemSecret(n)) // to encrypt session n data, incl. controller hello
dhSecret(n) = dh(hostHelloDhKey(n), controllerDhKey(n))
// controllerDhKey(n) is either from invitation or from multicast announcement
kemCiphertext(n) = enc(kemSecret(n), kemEncKey(n))