Cryptographic processor (CRYP)
RM0090
DocID018909 Rev 11
•
DES/TDES
–
Direct implementation of simple DES algorithms (a single key, K1, is used)
–
Supports the ECB and CBC chaining algorithms
–
Supports 64-, 128- and 192-bit keys (including parity)
–
2 × 32-bit initialization vectors (IV) used in the CBC mode
–
16 HCLK cycles to process one 64-bit block in DES
–
48 HCLK cycles to process one 64-bit block in TDES
•
Common to DES/TDES and AES
–
IN and OUT FIFO (each with an 8-word depth, a 32-bit width, corresponding to 4
DES blocks or 2 AES blocks)
–
Automatic data flow control with support of direct memory access (DMA) (using 2
channels, one for incoming data the other for processed data)
–
Data swapping logic to support 1-, 8-, 16- or 32-bit data
192b
16
16
16
28
10
16
16
14
16
29
16
256b
18
18
18
32
10
18
18
16
18
33
18
Table 111. Number of cycles required to process each 128-bit block
(STM32F43xxx)
