Freescale Semiconductor MCF5480 - Manual (Page 698)

MCF548x Reference Manual, Rev. 3
22-96 Freescale Semiconductor
Table 22-98 lists typical DEU/HMAC multi-function descriptor header values for the first descriptor.
Table 22-97. First Descriptor for Static Multi-Function Encryption/Decryption
Field Name Value/Type Description
Header Table 22-98 Header common to several descriptors (TYPE 0010)
LEN_1 HMAC Key Length Number of bytes in HMAC Key
PTR_1 HMAC Key Pointer Address of HMAC Key
LEN_2 HMAC Data Length Number of bytes to be HMAC’d
PTR_2 HMAC Data Pointer Address of data to be HMAC’d
LEN_3 Key Length Number of bytes in Key (8, 16, 24, or 32 bytes)
PTR_3 Key Pointer Address of Key
LEN_4 IV Length Number of bytes in IV (8, 24, or 56)
PTR_4 IV Pointer Address of IV
LEN_5 Data In Length Bytes of input data
PTR_5 Data In Pointer Address of ciphertext to be decrypted
LEN_6 Data Out Length Bytes of output data (should be equal to length of data in)
PTR_6 Data Out Pointer Address where output data is to be written
LEN_7 HMAC Out Length NULL
PTR_7 HMAC Out Pointer NULL
PTR_NEXT Next Descriptor Pointer Pointer to next data packet descriptor
Table 22-98. Typical Header Values for First Static Multi-Function DEU Descriptors
Header Value E/C S/T E/D Algorithm HMAC Pad
0x20039922 ECB Single DES Decrypt SHA256 Yes No
0x20139920 ECB Single DES Encrypt SHA256 Yes No
0x20039A22 ECB Single DES Decrypt MD5 Yes No
0x20139A20 ECB Single DES Encrypt MD5 Yes No
0x20039822 ECB Single DES Decrypt SHA Yes No
0x20139820 ECB Single DES Encrypt SHA Yes No
0x20439922 ECB Triple DES Decrypt SHA256 Yes No
0x20539920 ECB Triple DES Encrypt SHA256 Yes No
0x20439A22 ECB Triple DES Decrypt MD5 Yes No
0x20539A20 ECB Triple DES Encrypt MD5 Yes No
0x20439822 ECB Triple DES Decrypt SHA Yes No
0x20539820 ECB Triple DES Encrypt SHA Yes No
0x20239222 CBC Single DES Decrypt SHA256 Yes No