Add PSK cipher suites for DTLS 1.2#92

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jaredwolff wants to merge 8 commits intoalgesten:mainfrom

circuitdojo:psk-support

Commits on Mar 11, 2026

Add TLS_PSK_WITH_AES_128_CCM_8 (0xC0A8) cipher suite

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claude
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Add TLS_PSK_WITH_AES_128_GCM_SHA256 (0x00A8) cipher suite

jaredwolff
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Add remaining PSK cipher suites, OpenSSL interop tests, and fix optional SKE

jaredwolff
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Update docs, README, and changelog for PSK support

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Prevent PSK cipher suite downgrade in certificate mode

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fix: harden invalid-identity handling
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Commits on Mar 12, 2026

Fix CI failures: formatting, line width, feature gates, and dead code

jaredwolff
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claude
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Commits on Mar 13, 2026

Trim PSK to single cipher suite (CCM-8) and refactor PSK architecture

jaredwolff
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claude
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