Apache NiFi Security
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Java Cryptography Extension (JCE) Limited Strength Jurisdiction Policies

Because of US export regulations, default JVMs have http://docs.oracle.com/javase/7/docs/technotes/guides/security/SunProviders.html#importlimits available to them. For example, AES operations are limited to 128 bit keys by default. While AES-128 is cryptographically safe, this can have unintended consequences, specifically on Password-based Encryption (PBE).

PBE is the process of deriving a cryptographic key for encryption or decryption from user-provided secret material, usually a password. Rather than a human remembering a (random-appearing) 32 or 64 character hexadecimal string, a password or passphrase is used.

A number of PBE algorithms provided by NiFi impose strict limits on the length of the password due to the underlying key length checks. Below is a table listing the maximum password length on a JVM with limited cryptographic strength.

Table 1. Maximum Password Length on Limited Cryptographic Strength JVM

Algorithm Max Password Length

PBEWITHMD5AND128BITAES-CBC-OPENSSL

16

PBEWITHMD5AND192BITAES-CBC-OPENSSL

16

PBEWITHMD5AND256BITAES-CBC-OPENSSL

16

PBEWITHMD5ANDDES

16

PBEWITHMD5ANDRC2

16

PBEWITHSHA1ANDRC2

16

PBEWITHSHA1ANDDES

16

PBEWITHSHAAND128BITAES-CBC-BC

7

PBEWITHSHAAND192BITAES-CBC-BC

7

PBEWITHSHAAND256BITAES-CBC-BC

7

PBEWITHSHAAND40BITRC2-CBC

7

PBEWITHSHAAND128BITRC2-CBC

7

PBEWITHSHAAND40BITRC4

7

PBEWITHSHAAND128BITRC4

7

PBEWITHSHA256AND128BITAES-CBC-BC

7

PBEWITHSHA256AND192BITAES-CBC-BC

7

PBEWITHSHA256AND256BITAES-CBC-BC

7

PBEWITHSHAAND2-KEYTRIPLEDES-CBC

7

PBEWITHSHAAND3-KEYTRIPLEDES-CBC

7

PBEWITHSHAANDTWOFISH-CBC

7