Expansions: add ${sha3:<string>} item

[exim.git] / doc / doc-docbook / spec.xfpt

diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt
index 1e5b72e879933d8b1d66fd6246dcfb0029c21ef2..c46b503074b13693c5fb4c6a9f5858776d9e6997 100644 (file)
--- a/doc/doc-docbook/spec.xfpt
+++ b/doc/doc-docbook/spec.xfpt
@@ -10482,7 +10482,7 @@ variables or headers inside regular expressions.
 .cindex "SHA-1 hash"
 .cindex "expansion" "SHA-1 hashing"
 .cindex certificate fingerprint
-.cindex "&%sha2%& expansion item"
+.cindex "&%sha1%& expansion item"
 The &%sha1%& operator computes the SHA-1 hash value of the string, and returns
 it as a 40-digit hexadecimal number, in which any letters are in upper case.
 
@@ -10505,6 +10505,25 @@ If the string is a single variable of type certificate,
 returns the SHA-256 hash fingerprint of the certificate.
 
 
+.new
+.vitem &*${sha3:*&<&'string'&>&*}*&
+.vitem &*${sha3_<n>:*&<&'string'&>&*}*&
+.cindex "SHA3 hash"
+.cindex "expansion" "SHA3 hashing"
+.cindex "&%sha3%& expansion item"
+The &%sha3%& operator computes the SHA3-256 hash value of the string
+and returns
+it as a 64-digit hexadecimal number, in which any letters are in upper case.
+
+If a number is appended, separated by an underbar, it specifies
+the output length.  Values of 224, 256, 384 and 512 are accepted;
+with 256 being the default.
+
+The &%sha3%& expansion item is only supported if Exim has been
+compiled with GnuTLS 3.5.0 or later.
+.wen
+
+
 .vitem &*${stat:*&<&'string'&>&*}*&
 .cindex "expansion" "statting a file"
 .cindex "file" "extracting characteristics"