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Cryotography -Linux API for HMAC-SHA256 algorithm

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# 1  
Old 07-18-2009
Question Cryotography -Linux API for HMAC-SHA256 algorithm
Hi all,

I need to calculate MAC value using HMAC-SHA256 algorithm with a message and a key.

Is there any Linux APIs/utilities already exist for HMAC-SHA256?

Thanks,
Amio
# 2  
Old 07-18-2009
man sha256sum
# 3  
Old 07-20-2009
Hi Pludi,

Thanks for ur reply.

sha256sum [OPTION] [FILE] takes just the message as input whereas i need to pass 2 inputs, the message and the key in keyed-hmacsha256 algorithm.

Pls help.

Thanks,
Amio
# 4  
Old 07-20-2009
I don't know of any read-to-use utility, but the OpenSSL library provides a hmac function, which might be what you need.
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