Gcm.lengths: def of bend-collections@1.0.0.0
Import: import bend-collections@1.0.0.0/src/crypto/aes/gcm.bend as Gcm
Lines 119-122 of bend-collections@1.0.0.0/src/crypto/aes/gcm.bend: https://jend.leeeet.dev/read.txt?path=bend-collections@1.0.0.0/src/crypto/aes/gcm.bend&start_line=119&end_line=122

import Base

# [len(A)]_64 || [len(C)]_64, in bits.
def lengths(+aad: List<&2, U32>, +c: List<&2, U32>) -> List<&2, U32>:
  List.append(&2, U32, octets(8n, Nat.mul(8n, List.length(&2, U32, aad))),
    octets(8n, Nat.mul(8n, List.length(&2, U32, c))))

Uses (6):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List.append
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List.length
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.mul
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/crypto/aes/gcm.bend&name=octets