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Diffstat (limited to 'doc/doc-docbook/spec.xfpt')
| -rw-r--r-- | doc/doc-docbook/spec.xfpt | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt index c3fc1fb21..ce64fd405 100644 --- a/doc/doc-docbook/spec.xfpt +++ b/doc/doc-docbook/spec.xfpt @@ -17139,17 +17139,19 @@ prior to the 4.80 release, as Debian used to patch Exim to raise the minimum acceptable bound from 1024 to 2048. -.option tls_eccurve main string&!! prime256v1 +.option tls_eccurve main string&!! &`auto`& .cindex TLS "EC cryptography" -If built with a recent-enough version of OpenSSL, -this option selects a EC curve for use by Exim. +This option selects a EC curve for use by Exim. -Curve names of the form &'prime256v1'& are accepted. -For even more-recent library versions, names of the form &'P-512'& -are also accepted, plus the special value &'auto'& -which tells the library to choose. +After expansion it must contain a valid EC curve parameter, such as +&`prime256v1`&, &`secp384r1`&, or &`P-512`&. Consult your OpenSSL manual +for valid selections. -If the option is set to an empty string, no EC curves will be enabled. +For OpenSSL versions before (and not including) 1.0.2, the string +&`auto`& selects &`prime256v1`&. For more recent OpenSSL versions +&`auto`& tells the library to choose. + +If the option expands to an empty string, no EC curves will be enabled. .option tls_ocsp_file main string&!! unset |