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SWRU543–January 2019
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SHA/MD5 Accelerator
Chapter 19
SWRU543–January 2019
SHA/MD5 Accelerator
The SHA/MD5 module provides hardware-accelerated hash functions, and can run:
• MD5 message digest algorithm developed by Ron Rivest in 1991
• SHA-1 algorithm compliant with the FIPS 180-3 standard
• SHA-2 (SHA-224 and SHA-256) algorithm compliant with the FIPS 180-3 standard
• Hash message authentication code (HMAC) operation
The algorithms produce a condensed representation of a message or a data file, called digest or
signature, which can then be used to verify the message integrity.
• Hashing of 0 to 2
33
– 2 bytes of data (of which 2
32
–1 bytes are in one pass) using the MD5, SHA-1,
SHA-224, or SHA-256 hash algorithm (byte granularity only, no support for bit granularity)
• Automatic HMAC key preprocessing for HMAC keys up to 64 bytes
• Host-assisted HMAC key preprocessing for HMAC keys larger than 64 bytes
• HMAC from precomputes (inner or outer digest) for improved performance on small blocks
• Supports µDMA operation for data and context in and result out transfers
• Supports interrupt to read the digest (signature)
Topic ........................................................................................................................... Page
19.1 SHA/MD5 Functional Description........................................................................ 694
19.2 SHA-MD5 Registers .......................................................................................... 705
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