Junos OS

Any support for ipsec sha-256 authentication support on srx devices?

As per this URL SHA-2 is supported: https://apps.juniper.net/feature-explorer/feature-info.html?fKey=287&fn=Hash%20Algorithms%20SHA-2%20(SHA-256)

root@my-srx# set security ipsec proposal TEST authentication-algorithm ?
Possible completions:
  hmac-md5-96          HMAC-MD5-96 authentication algorithm
  hmac-sha-256-128     HMAC-SHA-256-128 authentication algorithm <----------
  hmac-sha1-96         HMAC-SHA1-96 authentication algorithm

So that must be interpreted as a no.

SRX SHA-2 impementation is based on RFC-4868: it produces a 256-bit digest, truncated to 128 bits (half)

https://tools.ietf.org/html/rfc4868#section-2.3