* switch from num_bytes to pwd_len

* always base64 whole 64 bytes of entropy and only then slice out [0:pwd_len] desired password length
* example pwd length changed to 21

Author: scgbckbone

bip-0085.mediawiki

@@ -265,45 +265,40 @@ OUTPUT
 ===PWD===
 Application number: 707764'
 
-The derivation path format is: <code>m/83696968'/707764'/{num_bytes}'/{index}'</code>
+The derivation path format is: <code>m/83696968'/707764'/{pwd_len}'/{index}'</code>
 
-`16 <= num_bytes <= 64`
+`20 <= pwd_len <= 86`
 
-Keep left-most `num_bytes` from the generated entropy and [https://datatracker.ietf.org/doc/html/rfc4648 Base64] encode the result.
-Remove any spaces or new lines inserted by Base64 encoding process. Resulting password string may contain up to 2 trailing `=` characters (base64 padding)
-depending on the value of `num_bytes`. Padding is considered part of the password and should be preserved.
+[https://datatracker.ietf.org/doc/html/rfc4648 Base64] encode the all 64 bytes of entropy.
+Remove any spaces or new lines inserted by Base64 encoding process. Slice base64 result string
+on index 0 to `pwd_len`. This slice is the password. As `pwd_len` is limited to 86, passwords will not contain padding.
 
 Entropy calculation:<br>
-R = 64  (do not count padding)<br>
-L = pwd_length - num_pad<br>
+R = 64  (base64 - do not count padding)<br>
+L = pwd_len<br>
 Entropy = log2(R ** L)<br>
 
 {| class="wikitable" style="margin:auto"
-! num_bytes !! pwd_length !! num_pad !! (cca) entropy
-|-
-| 17 || 24 || 1 || 138.0
+! pwd_length !! (cca) entropy
 |-
-| 18 || 24 || 0 || 144.0
+| 20 || 120.0
 |-
-| 21 || 28 || 0 || 192.0
+| 24 || 144.0
 |-
-| 32 || 44 || 1 || 258.0
+| 32 || 192.0
 |-
-| 33 || 44 || 0 || 264.0
+| 64 || 384.0
 |-
-| 62 || 84 || 1 || 498.0
-|-
-| 63 || 84 || 0 || 504.0
+| 86 || 516.0
 |}
 
 INPUT:
 * MASTER BIP32 ROOT KEY: xprv9s21ZrQH143K2LBWUUQRFXhucrQqBpKdRRxNVq2zBqsx8HVqFk2uYo8kmbaLLHRdqtQpUm98uKfu3vca1LqdGhUtyoFnCNkfmXRyPXLjbKb
-* PATH: m/83696968'/707764'/17'/0'
+* PATH: m/83696968'/707764'/21'/0'
 
 OUTPUT
 * DERIVED ENTROPY=d7ad61d4a76575c5bad773feeb40299490b224e8e5df6c8ad8fe3d0a6eed7b85ead9fef7bcca8160f0ee48dc6e92b311fc71f2146623cc6952c03ce82c7b63fe
-* DERIVED PWD=161h1KdldcW613P+60AplJA=
-
+* DERIVED PWD=dKLoepugzdVJvdL56ogNV
 ===RSA===
 
 Application number: 828365'