# Hash < 64
output_len: 63
error_desc: `buf.len()` is invalid

# Hash > 64
output_len: 65
error_desc: `buf.len()` is invalid

# Varlen hash < 1
output_len: 0
error_desc: `buf.len()` is too small

# Varlen hash > 64
output_len: 65
error_desc: `buf.len()` is too large