https://community.cloudera.com/t5/Support-Questions/How-to-use-DecryptContent-with-AES-128-CTR-and-an-IV/m-p/396646#M249478 <P>For anyone reading here; I never got the <SPAN>DecryptContent processor&nbsp;</SPAN>to work. Made a Groovy script processor instead, that handled the decrypting</P> Thu, 31 Oct 2024 07:50:50 GMT Molleb 2024-10-31T07:50:50Z https://community.cloudera.com/t5/Support-Questions/How-to-use-DecryptContent-with-AES-128-CTR-and-an-IV/m-p/393270#M248410 <P>I have the AES decryption working in a Nodejs script using crypto locally on my computer, with the following parts:</P><P>Text to decrypt: c6 c7 4b 49 0d cf 5c 20 87 0a e0 cd c4 a7 bf 94 d8<BR />Key: 3E 9B 26 FE 46 4F 6D 2D 2F 69 5D 87 8A 07 93 74<BR />Initialization Vector (IV): 2d 2c 83 42 00 74 1b 16 20 c0 7d 13 20 00 00 00</P><P>Correct result: 14 25 79 ed a8 ff a7 00 00 e5 03 00 00 be 03 00 00</P><P>So I know both key and IV are correct. I am using AES128, CTR and NoPadding</P><P>Now, I need to do it in Apache Nifi, and I am trying to use the DecryptContent processor. I am confused about how to make it happen and have tried quite a few things, the latest being:</P><P>Cipher Algorithm Mode is set to CTR<BR />Cipher Algorithm Padding is set to NoPadding<BR />Key Specification Format: RAW</P><P>I have set the content of the incoming flowfile content to</P><P>c6c74b490dcf5c20870ae0cdc4a7bf94d84E69466949562d2c834200741b1620c07d1320000000<BR />(With 4E6946694956 as the NiFiIV delimiter)</P><P>This results in an error from the DecryptContent processor: "Wrong IV length: must be 16 bytes long"<BR />This suggests to me that it is reading the payload as a normal text string, and not as HEX values. Is there a way to set the content to HEX specifically?</P><P>The documentation is a little sketchy about how to provide the content to be decrypted (or I have just missed something), so I am hoping you can help me.</P> Tue, 10 Sep 2024 08:33:11 GMT https://community.cloudera.com/t5/Support-Questions/How-to-use-DecryptContent-with-AES-128-CTR-and-an-IV/m-p/393270#M248410 Molleb 2024-09-10T08:33:11Z https://community.cloudera.com/t5/Support-Questions/How-to-use-DecryptContent-with-AES-128-CTR-and-an-IV/m-p/393274#M248413 <P><a href="https://community.cloudera.com/t5/user/viewprofilepage/user-id/116262">@Molleb</a>,&nbsp;Welcome to our community! To help you get the best possible answer, I have tagged in our NiFi experts&nbsp;<a href="https://community.cloudera.com/t5/user/viewprofilepage/user-id/35454">@MattWho</a>&nbsp;<a href="https://community.cloudera.com/t5/user/viewprofilepage/user-id/80381">@SAMSAL</a>&nbsp;<a href="https://community.cloudera.com/t5/user/viewprofilepage/user-id/38301">@mburgess</a>&nbsp;&nbsp;who may be able to assist you further.<BR /><BR />Please feel free to provide any additional information or details about your query, and we hope that you will find a satisfactory solution to your question.</P> Tue, 10 Sep 2024 10:00:37 GMT https://community.cloudera.com/t5/Support-Questions/How-to-use-DecryptContent-with-AES-128-CTR-and-an-IV/m-p/393274#M248413 VidyaSargur 2024-09-10T10:00:37Z https://community.cloudera.com/t5/Support-Questions/How-to-use-DecryptContent-with-AES-128-CTR-and-an-IV/m-p/396646#M249478 <P>For anyone reading here; I never got the <SPAN>DecryptContent processor&nbsp;</SPAN>to work. Made a Groovy script processor instead, that handled the decrypting</P> Thu, 31 Oct 2024 07:50:50 GMT https://community.cloudera.com/t5/Support-Questions/How-to-use-DecryptContent-with-AES-128-CTR-and-an-IV/m-p/396646#M249478 Molleb 2024-10-31T07:50:50Z