Missing support for BCDString in BER

[Jelmoh]

Hi,

I am trying to decode a BER encoded file using a specification which also specifies several fields as being of BCDString type.
The specification provides the following comments for this type:

-- The BCDString data type (Binary Coded Decimal String) is used to represent
-- several digits from 0 through 9, a, b, c, d, e.
-- Two digits are encoded per octet. The four leftmost bits of the octet represent
-- the first digit while the four remaining bits represent the following digit.
-- A single f must be used as a filler when the total number of digits to be
-- encoded is odd.
-- No other filler is allowed.

And an example of one of the fields as it is in the specification:
Imsi ::= [APPLICATION 129] BCDString --(SIZE(3..8))

The provides SIZE value differs per field.

I am currently using the following code to decode these fields in my own script:

for char in field_value:
    for val in (char >> 4, char & 0xF):
        if val == 0xF:
            return
        yield str(val)

Let me know if this is enough information to go on, if not, which information do you need?

Cheers,
Jelmoh

[eerimoq]

Hi!

I don't work on this project actively anymore. Feel free to implement support for it yourself and submit a PR and I can merge.

Thanks,
Erik