Issue while generating MD5 if there are any special characters in the CLOB

Hi Guys,
I need your help...
We are using dbms_crypto.hash to generate the MD5 hash value for a CLOB that will be sent to other feeder systems. The feeder systems validate the file by generating the MD5 hash value on their end and compare with the MD5 generated in Oracle and accept the file only if the MD5 hash value matches.
The MD5 file matches between both the systems except in the case where there are special characters in the CLOB. Somehow, MD5 is prefixing Â character before any special character and calculating the MD5 value. In our case, our special characters being ®, §, ™, ©....
This is a high priority issue for us and it is holding our UAT.
We are using Oracle 11.2.0.2.0.
Your response is really appreciated.
Best Regards
Gupta

Welcome to the forum!
Whenever you post provide your 4 digit Oracle version.
>
We are using dbms_crypto.hash to generate the MD5 hash value for a CLOB that will be sent to other feeder systems. The feeder systems validate the file by generating the MD5 hash value on their end and compare with the MD5 generated in Oracle and accept the file only if the MD5 hash value matches.
The MD5 file matches between both the systems except in the case where there are special characters in the CLOB. Somehow, MD5 is prefixing Â character before any special character and calculating the MD5 value. In our case, our special characters being ®, §, ™, ©....
>
See if my reply in this thread addresses your problem.
Re: MD5 HASH computed from DBMS_CRYPTO does not match .NET MD5
The fix in almost all of these cases is to understand that the Crypto package always converts everything to AL32UTF8 before hashing.
ALWAYS.
ALWAYS.
ALWAYS.
Unless the 'other' hash generators (substitute any generator you wish) do it the Oracle way you will NEVER get a match.
NEVER.
NEVER.
NEVER.
There are no workarounds.

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Thread 0 is waiting to acquire ''com.crystaldecisions.reports.queryengine.av@12e0415'
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