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Update of "Prohibited TLS 1.2 Cipher Suites" #825

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Update of "Prohibited TLS 1.2 Cipher Suites" #825

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27 changes: 23 additions & 4 deletions draft-ietf-httpbis-http2bis.xml
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Original file line number Diff line number Diff line change
Expand Up @@ -4835,7 +4835,7 @@
</references>
</references>
<section anchor="BadCipherSuites">
<name>Prohibited TLS 1.2 Cipher Suites</name>
<name>Prohibited TLS 1.2 Cipher Suites and PskKeyExchangeModes</name>
<t>
An HTTP/2 implementation MAY treat the negotiation of any of the following cipher suites
with TLS 1.2 as a <xref target="ConnectionErrorHandler">connection error</xref> of type
Expand Down Expand Up @@ -5118,13 +5118,32 @@
<li>TLS_PSK_WITH_AES_256_CCM</li>
<li>TLS_PSK_WITH_AES_128_CCM_8</li>
<li>TLS_PSK_WITH_AES_256_CCM_8</li>
<li>TLS_PSK_WITH_CHACHA20_POLY1305_SHA256</li>
<li>TLS_RSA_PSK_WITH_CHACHA20_POLY1305_SHA256</li>
</ul>
<t>
An HTTP/2 implementation MAY treat the negotiation of any of the following cipher suites
with TLS 1.3 as a <xref target="ConnectionErrorHandler">connection error</xref> of type
<xref target="INADEQUATE_SECURITY" format="none">INADEQUATE_SECURITY</xref>:
</t>
<ul spacing="compact">
<li>TLS_SHA256_SHA256</li>
<li>TLS_SHA384_SHA384</li>
</ul>
<t>
An HTTP/2 implementation MAY treat the negotiation of any of the following PskKeyExchangeModes
with TLS 1.3 as a <xref target="ConnectionErrorHandler">connection error</xref> of type
<xref target="INADEQUATE_SECURITY" format="none">INADEQUATE_SECURITY</xref>:
</t>
<ul spacing="compact">
<li>psk_ke</li>
</ul>
<aside>
<t>Note:
This list was assembled from the set of registered TLS cipher suites at the time of
writing. This list includes those cipher suites that do not offer an ephemeral key
This list was assembled from the set of registered TLS cipher suites and PskKeyExchangeModes at the time of
writing. This list includes those cipher suites and PskKeyExchangeMode that do not offer an ephemeral key
exchange and those that are based on the TLS null, stream, or block cipher type (as
defined in <xref target="TLS12" section="6.2.3"/>). Additional cipher suites with
defined in <xref target="TLS12" section="6.2.3"/>). Additional cipher suites or PskKeyExchangeMode with
these properties could be defined; these would not be explicitly prohibited.
</t>
</aside>
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