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5812-DS01-R 数据表(PDF) 16 Page - Broadcom Corporation.

部件名 5812-DS01-R
功能描述  Security Processor
PDF  84 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  BOARDCOM [Broadcom Corporation.]
网页  http://www.broadcom.com
标志 BOARDCOM - Broadcom Corporation.

5812-DS01-R 数据表(HTML) 16 Page - Broadcom Corporation.

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BCM5812
Advance Data Sheet
3/11/03
B roa dcom Co rpo rat ion
Page 8
Cryptographic Operations
Document
5812-DS01-405-R
Figure 6: Computed HMAC Inner and Outer State
Note
Authentication without encryption for AH or for ESP with the NULL encryption algorithm is supported,
as is NULL authentication for confidentiality-only ESP. However, at least one of encryption or
authentication must be defined.
NULL encryption with NULL authentication is specifically disallowed.
Note
The byte order for 3DES keys, IV, and HMAC inner and outer states may differ from the host CPU string
byte order.
•
DES keys in FIPS-46-3 are numbered left to right, from 1 to 32. The first key byte is in the leftmost
byte position of the first 32-bit word of the key.
•
For example, the test key string <0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef> is represented in
the Command Context as two 32-bit words, <0x01234567, 0x89abcdef>.
•
Single DES uses the same command and structures, with all three keys the same.
•
The offset value in the command context is in 32-bit words, not in bytes.
KEY
0
16 or 20 bytes
Pad to 64 bytes
IPAD (0x56)
Pad to 64 bytes
MD5/SHA1
ROUND
INNER STATE
KEY
0
16 or 20 bytes
Pad to 64 bytes
OPAD (0x3c)
Pad to 64 bytes
MD5/SHA1
ROUND
OUTER STATE
KEY
0
16 or 20 bytes
Pad to 64 bytes
IPAD (0x56)
Pad to 64 bytes
MD5/SHA1
ROUND
INNER STATE
KEY
0
16 or 20 bytes
Pad to 64 bytes
OPAD (0x3c)
Pad to 64 bytes
MD5/SHA1
ROUND
OUTER STATE



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