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5812-DS01-R 数据表(PDF) 41 Page - Broadcom Corporation.

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

5812-DS01-R 数据表(HTML) 41 Page - Broadcom Corporation.

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Advance Data Sheet
BCM5812
3/11/03
B roa dcom Co rpo rat ion
Document
5812-DS01-405-R
Cryptographic Operations
Page 33
DSA sign using a single input message fragment and optional explicitly provided random number. Generate random number
should be one of these two values.
The random number is not needed for verification and is usually discarded following creation of the signature. The BCM5812
generates a 20 byte random value, which is not output.
The signature values, r and s, are output in two fragment buffers, as shown in Figure 29.
Figure 29: DSA Sign
Figure 30 on page 34 shows the DSA verify operation. As with DSA sign, the message M may be input as a pre-computed
SHA-1 hash value or explicitly hashed by the BCM5812. If the hash is supplied, the hash generated parameter must be
0x0000. If the message is supplied, hash generated should be set to 0x0001. The same message fragmentation rules must
be followed as for DSA sign, with intermediate fragments other than the last 64 bytes long. The signature values, r and s,
are input following the hash or message, with s at the buffer address supplied in the last input fragment chain entry.
DSA verify uses MCR2@, and opcode 0x06.
At least three input fragments must be supplied, and the lengths of the last two (r and s) must be 20 bytes each. The host
software can then compare the output V value to the input R value to verify the signature.
COMMAND CONTEXT ADDRESS
NEXT INPUT FRAGMENT CHAIN ENTRY
RESERVED
INPUT FRAGMENT LENGTH
INPUT FRAGMENT ADDRESS
DLENGTH
RESERVED
NEXT OUTPUT FRAGMENT CHAIN ENTRY
RESERVED
OUTPUT BUFFER LENGTH
OUTPUT FRAGMENT ADDRESS
Input Message
Or Hash Value
Output R Value
(20 Bytes)
LENGTH
31
Command Context
OPCODE
RESERVED
0
MODULUS Q
20 Bytes
HASH GENERATED
MODULUS P
32-128
Bytes
BASE G
32-128
Bytes
MODULUS P LENGTH
GENERATE RANDOM NUMBER
PRIVATE KEY X
20 Bytes
NEXT INPUT FRAGMENT CHAIN ENTRY
RESERVED
FRAGMENT LENGTH
INPUT FRAGMENT ADDRESS
Input Random Number
(20 Bytes)
If supplied by software
(Generate Ramdom == 0)
NEXT OUTPUT FRAGMENT CHAIN ENTRY
RESERVED
FRAGMENT LENGTH
OUTPUT FRAGMENT ADDRESS
Output S Value
(20 Bytes)
Packet Descriptor
COMMAND CONTEXT ADDRESS
NEXT INPUT FRAGMENT CHAIN ENTRY
RESERVED
INPUT FRAGMENT LENGTH
INPUT FRAGMENT ADDRESS
DLENGTH
RESERVED
NEXT OUTPUT FRAGMENT CHAIN ENTRY
RESERVED
OUTPUT BUFFER LENGTH
OUTPUT FRAGMENT ADDRESS
Input Message
Or Hash Value
Output R Value
(20 Bytes)
LENGTH
31
Command Context
OPCODE
RESERVED
0
MODULUS Q
20 Bytes
HASH GENERATED
MODULUS P
32-128
Bytes
BASE G
32-128
Bytes
MODULUS P LENGTH
GENERATE RANDOM NUMBER
PRIVATE KEY X
20 Bytes
LENGTH
31
Command Context
OPCODE
RESERVED
0
MODULUS Q
20 Bytes
MODULUS Q
20 Bytes
HASH GENERATED
MODULUS P
32-128
Bytes
MODULUS P
32-128
Bytes
BASE G
32-128
Bytes
BASE G
32-128
Bytes
MODULUS P LENGTH
GENERATE RANDOM NUMBER
PRIVATE KEY X
20 Bytes
PRIVATE KEY X
20 Bytes
NEXT INPUT FRAGMENT CHAIN ENTRY
RESERVED
FRAGMENT LENGTH
INPUT FRAGMENT ADDRESS
NEXT INPUT FRAGMENT CHAIN ENTRY
RESERVED
FRAGMENT LENGTH
INPUT FRAGMENT ADDRESS
Input Random Number
(20 Bytes)
If supplied by software
(Generate Ramdom == 0)
NEXT OUTPUT FRAGMENT CHAIN ENTRY
RESERVED
FRAGMENT LENGTH
OUTPUT FRAGMENT ADDRESS
Output S Value
(20 Bytes)
Packet Descriptor



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