Non-standard public keys and signatures

[TierNolan]

Is there code that checks that public keys and signatures are canonical?

For example, a public key with a coordinate larger than the modulus or encoded with extra leading zeros or something (acceptable to openSSL but unusual).

I have a memory of a non-canonical encodings being  set as non-standard, but couldn't find the code.

[edit]
Found it, the flag SCRIPT_VERIFY_STRICTENC causes IsCanonicalPubKey to check public keys