Description and usage of CryptographicHashContent processor:

Calculates a cryptographic hash value for the flowfile content using the given algorithm and writes it to an output attribute. Please refer to for help to decide which algorithm to use.


content, hash, sha, blake2, md5, cryptography


In the list below, the names of required properties appear in bold. Any other properties (not in bold) are considered optional. The table also indicates any default values.


Default Value

Allowable Values


Fail if the content is empty

false * true
* false
Route to failure if the content is empty. While hashing an empty value is valid, some flows may want to detect empty input.

Hash Algorithm

SHA-256 * MD2 
* MD5  
* SHA-1  
* SHA-224  
* SHA-256  
* SHA-384  
* SHA-512  
* SHA-512/224 
* SHA-512/256  
* SHA3-224  
* SHA3-256  
* SHA3-384  
* SHA3-512  
* BLAKE2-160  
* BLAKE2-256  
* BLAKE2-384  
* BLAKE2-512  
The hash algorithm to use. Note that not all of the algorithms available are recommended for use (some are provided for legacy compatibility). There are many things to consider when picking an algorithm; it is recommended to use the most secure algorithm possible.




success Used for flowfiles that have a hash value added
failure Used for flowfiles that have no content if the 'fail on empty' setting is enabled

Reads Attributes:

None specified.

Writes Attributes:



content_<algorithm> This processor adds an attribute whose value is the result of hashing the flowfile content. The name of this attribute is specified by the value of the algorithm, e.g. 'content_SHA-256'.

State management:

This component does not store state.


This component is not restricted.

Input requirement:

This component requires an incoming relationship.

System Resource Considerations:

None specified.