global-functions: add $GetRandomSha256

1 files changed, 12 insertions, 0 deletions

diff --git a/global-functions b/global-functions
index 4bc0d0b..a37ce5d 100644
--- a/global-functions
+++ b/global-functions
@@ -28,6 +28,7 @@
 :global DownloadPackage;
 :global GetMacVendor;
 :global GetRandom;
+:global GetRandomSha256;
 :global LogPrintExit;
 :global MailServerIsUp;
 :global MkDir;
@@ -316,6 +317,17 @@
   :return ($Sum % $Max);
 }
 
+# generate random sha256 string
+# returns 64 bytes of 0-9 and a-f
+:set GetRandomSha256 do={
+  :local FingerPrint;
+  / certificate add name=GetRandomSha256-template common-name=GetRandomSha256 key-size=prime256v1;
+  / certificate sign GetRandomSha256-template name=GetRandomSha256 without-paging as-value;
+  :set FingerPrint [ / certificate get GetRandomSha256 fingerprint ];
+  / certificate remove GetRandomSha256;
+  :return $FingerPrint;
+}
+
 # log and print with same text, optionally exit
 :set LogPrintExit do={
   :local Severity [ :tostr $1 ];