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参数资料
| 型号： | BCM5802 |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | SPECIALTY MICROPROCESSOR CIRCUIT, PQFP144 |
| 封装： | 28 X 28 MM, QFP-144 |
| 文件页数： | 4/41页 |
| 文件大小： | 571K |
| 代理商： | BCM5802 |
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■ BCM5802
Production Specification
07/03/02
B roa dcom Co rpo rat ion
Page 4
Processing Overview
Document
5802-DS03-R
The following figure illustrates a high-level view of the BCM5802 packet processing.
The BCM5802 provides SSL/TLS key exchange using RSA in the following stages:
1
Fetch command context, including keys and message through DMA.
2
If the required operation is private key decryption, use the private key RSA algorithm with pre-computed components
generated using the Chinese Remainder Theorem.
3
If the required operation is public key encryption, use the public RSA algorithm.
4
Write the decrypted/encrypted message to the output buffer.
The BCM5802 generates keys using the Diffie-Hellman algorithm for IKE handshake in the following stages:
1
Fetch command context and message through DMA.
2
If the required operation is to generate a message to another party (gx mod n), generate a random number from the
random number generator unit on the chip and then perform the modular exponentiation with the generated random
number as the exponent on the chip.
3
If the required operation is to generate the shared key from the message received (Yx mod n), perform the modular
exponentiation with a previously generated random number on the chip. The random number is a part of the command
context through DMA.
4
Write the output including the generated random number to the output buffer.
Note
Multiple sets of input packets can be specified via a single command descriptor (single PCI write).
Figure 1:
Packet Processing Overview
Packet
Context
Header
Payload
Encr
yp
t
Aut
hent
icat
e
BCM5802
Security
Processor
BCM5802
Security
Processor
C
om
m
and
B
uffer
Header
Payload
HMAC
Codes
Status
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