5812-DS00-R datasheet(46/84 Pages) BOARDCOM

46 / 84 page

BCM5812

Advance Data Sheet

3/11/03

B roa dcom Co rpo rat ion

Page 38

Cryptographic Operations

Document

5812-DS01-405-R

Figure 34: Modular Multiply

NEXT INPUT FRAGMENT CHAIN ENTRY

RESERVED

FRAGMENT LENGTH

INPUT FRAGMENT ADDRESS

Multiplicand A

(Modulus Length)

Multiplier B

(Modulus Length)

A*B mod N

(Modulus Length)

COMMAND CONTEXT ADDRESS

NEXT INPUT FRAGMENT CHAIN ENTRY

RESERVED

INPUT FRAGMENT LENGTH

INPUT FRAGMENT ADDRESS

RESERVED

NEXT OUTPUT FRAGMENT CHAIN ENTRY

RESERVED

OUTPUT BUFFER LENGTH

OUTPUT FRAGMENT ADDRESS

LENGTH

OPCODE

MODULUS N

64-256

Bytes

MODULUS LENGTH

RESERVED

Command Context

Packet Descriptor

NEXT INPUT FRAGMENT CHAIN ENTRY

RESERVED

FRAGMENT LENGTH

INPUT FRAGMENT ADDRESS

Multiplicand A

(Modulus Length)

Multiplier B

(Modulus Length)

A*B mod N

(Modulus Length)

COMMAND CONTEXT ADDRESS

NEXT INPUT FRAGMENT CHAIN ENTRY

RESERVED

INPUT FRAGMENT LENGTH

INPUT FRAGMENT ADDRESS

RESERVED

NEXT OUTPUT FRAGMENT CHAIN ENTRY

RESERVED

OUTPUT BUFFER LENGTH

OUTPUT FRAGMENT ADDRESS

COMMAND CONTEXT ADDRESS

NEXT INPUT FRAGMENT CHAIN ENTRY

RESERVED

INPUT FRAGMENT LENGTH

INPUT FRAGMENT ADDRESS

RESERVED

NEXT OUTPUT FRAGMENT CHAIN ENTRY

RESERVED

OUTPUT BUFFER LENGTH

OUTPUT FRAGMENT ADDRESS

COMMAND CONTEXT ADDRESS

NEXT INPUT FRAGMENT CHAIN ENTRY

RESERVED

INPUT FRAGMENT LENGTH

INPUT FRAGMENT ADDRESS

RESERVED

NEXT OUTPUT FRAGMENT CHAIN ENTRY

RESERVED

OUTPUT BUFFER LENGTH

OUTPUT FRAGMENT ADDRESS

LENGTH

OPCODE

MODULUS N

64-256

Bytes

MODULUS LENGTH

RESERVED

Command Context

LENGTH

OPCODE

MODULUS N

64-256

Bytes

MODULUS LENGTH

RESERVED

Command Context

Packet Descriptor

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