https://bugs.exim.org/show_bug.cgi?id=1700
Bug ID: 1700
Summary: DKIM verification fails with pubkey_syntax for
domainkey records published with spaces in base64
encoded publickey
Product: Exim
Version: 4.86
Hardware: x86-64
OS: Linux
Status: NEW
Severity: bug
Priority: medium
Component: DKIM
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Exim reports a syntax error on parsing public keys which contain spaces within
the base64 encoded p= tag, which would otherwise pass validation.
As per http://dkim.org/specs/rfc4871-dkimbase.html#key-text spaces are
permitted within the base64 encoded p= tag.
An example is
dig +short bdk._domainkey.e.huntoffice.ie TXT
"v=DKIM1\; k=rsa\; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCxB//
V3xdjXdGzOleXXn1d4AJ5nDBk00dZTzEVZLvJEdzYsx573qgw7q8x3gkKx20rfTQbh3/GFT6GjtMwc5ejzmneseM5fyC4pjcFELrXQvCm/NbRNSnQCFd8eGMZppxFhWSrwYI2bAprgVJxbVC3Z6qGTN6TKXI/dwPxaJR
QIDAQAB"
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