https://community.nxp.com/t5/S32K/HSE-AES-CFB-inputLength-is-limited/m-p/1782283#M30163 <P>Hi <a href="https://community.nxp.com/t5/user/viewprofilepage/user-id/225956">@cool_boy</a>&nbsp;<BR />Yes, the size of message must be a multiple of the cipher block size. If your message is not aligned to this size, it needs to be padded accordingly. <BR />Regards,<BR />Lukas</P> Wed, 03 Jan 2024 11:45:40 GMT lukaszadrapa 2024-01-03T11:45:40Z https://community.nxp.com/t5/S32K/HSE-AES-CFB-inputLength-is-limited/m-p/1779983#M29936 <P>Hello！</P><P>I use AES-CFB mode and find that the input length is limited. But the input length of CFB mode can be any byte. Is there a problem here?<span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="CFB.png" style="width: 859px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/255897i56E0244D91EECE42/image-size/large?v=v2&amp;px=999" role="button" title="CFB.png" alt="CFB.png" /></span></P> Tue, 26 Dec 2023 09:05:04 GMT https://community.nxp.com/t5/S32K/HSE-AES-CFB-inputLength-is-limited/m-p/1779983#M29936 cool_boy 2023-12-26T09:05:04Z https://community.nxp.com/t5/S32K/HSE-AES-CFB-inputLength-is-limited/m-p/1782283#M30163 <P>Hi <a href="https://community.nxp.com/t5/user/viewprofilepage/user-id/225956">@cool_boy</a>&nbsp;<BR />Yes, the size of message must be a multiple of the cipher block size. If your message is not aligned to this size, it needs to be padded accordingly. <BR />Regards,<BR />Lukas</P> Wed, 03 Jan 2024 11:45:40 GMT https://community.nxp.com/t5/S32K/HSE-AES-CFB-inputLength-is-limited/m-p/1782283#M30163 lukaszadrapa 2024-01-03T11:45:40Z