Initialization vector in AES-CBC does not work.

ericg — Thu, 02 Jun 2016 08:31:54 GMT

How to load initialization vector properly in CAAM when using AES-CBC? The following code always produce same cipher text with random IV.

append_load(desc, iv_dma, 16, LDST_SRCDST_BYTE_CONTEXT | LDST_CLASS_1_CCB); // 0x12200010

Below is my full command sequence. Am I missing something here? Thanks.

Encrypt	Decrypt
0 -> 0xb080000b 1 -> 0x12200010 2 -> 0x7f0a6808 3 -> 0x02400020 4 -> 0x8941fdb0 5 -> 0x8210010d 6 -> 0x22120100 7 -> 0x892ef000 8 -> 0x60700000 9 -> 0x892ef100 10 -> 0x00000100	0 -> 0xb080000b 1 -> 0x12200010 2 -> 0x7f0a6818 3 -> 0x02400020 4 -> 0x8941fdd0 5 -> 0x8210010c 6 -> 0x22120100 7 -> 0x892ef100 8 -> 0x60700000 9 -> 0x892ef200 10 -> 0x00000100

Encrypt

Decrypt

0 -> 0xb080000b

1 -> 0x12200010

2 -> 0x7f0a6808

3 -> 0x02400020

4 -> 0x8941fdb0

5 -> 0x8210010d

6 -> 0x22120100

7 -> 0x892ef000

8 -> 0x60700000

9 -> 0x892ef100

10 -> 0x00000100

0 -> 0xb080000b

1 -> 0x12200010

2 -> 0x7f0a6818

3 -> 0x02400020

4 -> 0x8941fdd0

5 -> 0x8210010c

6 -> 0x22120100

7 -> 0x892ef100

8 -> 0x60700000

9 -> 0x892ef200

10 -> 0x00000100

Re: Initialization vector in AES-CBC does not work.

Yuri — Fri, 03 Jun 2016 08:43:51 GMT

Hello,

Sorry, but the information you are requesting is treated as confidential info at this time and requires a signed NDA (Non-Disclosure Agreement). Naturally, we cannot discuss this with you in public anyway, this requires to be handled
as a Service Request (SR).

How to submit a new question for NXP Support

Have a great day,
Yuri

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topic Re: Initialization vector in AES-CBC does not work. in i.MX Processors

Initialization vector in AES-CBC does not work.

Re: Initialization vector in AES-CBC does not work.