feature: clienthello.set_ciphers().#535
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Sets the connection's TLS <= 1.2 cipher list and/or TLS 1.3 ciphersuites from ssl_client_hello_by_lua*, e.g. keyed on the client hello server name. On failure the connection's SSL object is left exactly as it was -- cipher list, ciphersuites, and error queue all untouched -- so the handshake proceeds with the default list inherited from the server block (ssl_ciphers/ssl_conf_command). A partially invalid string is not an error: OpenSSL's parsers drop unknown tokens and succeed if any token matches, so the surviving subset is applied with no fallback to the default list (covered by TEST 15). Requires ngx_http_lua_ffi_ssl_set_ciphers() from lua-nginx-module.
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Adds
clienthello.set_ciphers(ciphers, ciphersuites?)to set the connection's TLS <= 1.2 cipher list and/or TLS 1.3 ciphersuites fromssl_client_hello_by_lua*, e.g. keyed on the client hello server name. Complementsclienthello.set_protocols().On failure the connection's SSL object is left exactly as it was -- cipher list, ciphersuites, and error queue all untouched -- so the handshake proceeds with the default list inherited from the server block (
ssl_ciphers/ssl_conf_command). See openresty/lua-nginx-module#2513 for why that guarantee needs pre-validation on a scratchSSL_CTX.A partially invalid string is not an error: OpenSSL's parsers drop unknown tokens and succeed if any token matches, so the surviving subset is applied with no fallback to the default list. The failure path only covers strings OpenSSL rejects outright.
Requires
ngx_http_lua_ffi_ssl_set_ciphers()from openresty/lua-nginx-module#2513.Tests: valid list applied (negotiated cipher asserted), invalid TLS <= 1.2 list fails without breaking the handshake, invalid TLS 1.3 ciphersuites fail without breaking the handshake, partially invalid list succeeds and applies the valid subset.