julian at mehnle
Jun 12, 2007, 2:07 PM
Post #4 of 5
(2035 views)
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Re: Case sensitivity of SPF results in SPF Received
[In reply to]
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Scott Kitterman wrote:
> The ABNF for Received SPF shows the results with an initial capital
> letter:
>
> http://www.openspf.org/RFC_4408#header-field
>
> result = "Pass" / "Fail" / "SoftFail" / "Neutral" /
> "None" / "TempError" / "PermError"
>
> Is that case sensitive? Pyspf currently returns all lower case and I'm
> wondering if that's a bug?
<http://www.openspf.org/RFC_4408#abnf>:
| See RFC 4234 for ABNF notation. Please note that as per this ABNF
| definition, literal text strings (those in quotes) are case-insensitive.
RFC 4234, "2.3. Terminal Values":
| 2.3. Terminal Values
|
| [...]
|
| ABNF permits the specification of literal text strings directly,
| enclosed in quotation-marks. Hence:
| command = "command string"
|
| Literal text strings are interpreted as a concatenated set of
| printable characters.
|
| NOTE:
| ABNF strings are case-insensitive and the character set for these
| strings is us-ascii.
|
| Hence:
| rulename = "abc"
| and:
| rulename = "aBc"
| will match "abc", "Abc", "aBc", "abC", "ABc", "aBC", "AbC", and
| "ABC".
|
| To specify a rule that IS case SENSITIVE, specify the characters
| individually.
|
| For example:
| rulename = %d97 %d98 %d99
| or
| rulename = %d97.98.99
| will match only the string that comprises only the lowercased
| characters, abc.
Scott Kitterman wrote:
> Some of the applications that use the pyspf library expect lower case,
> so any changes will need to be handled with care.
Then they are in error.
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