From aac963315809bd5c97863274462b6d63fbac74ac Mon Sep 17 00:00:00 2001
From: Ben van Hartingsveldt <ben.vanhartingsveldt@yocto.com>
Date: Mon, 11 May 2026 20:55:09 +1000
Subject: [PATCH 1/2] test: add Base45 and Proquint test vectors

Add test vectors for the newly-registered base45 (RFC9285) and proquint
encodings across the basic, leading_zero, two_leading_zeros and
case_insensitivity test files.
---
 tests/basic.csv              | 2 ++
 tests/case_insensitivity.csv | 1 +
 tests/leading_zero.csv       | 1 +
 tests/two_leading_zeros.csv  | 2 ++
 4 files changed, 6 insertions(+)

diff --git a/tests/basic.csv b/tests/basic.csv
index 8c7a892..8c9320b 100644
--- a/tests/basic.csv
+++ b/tests/basic.csv
@@ -15,10 +15,12 @@ base32hexpadupper, "TF5IN683DC5N6I811"
 base32z, "hxf1zgedpcfzg1ebb"
 base36, "k2lcpzo5yikidynfl"
 base36upper, "K2LCPZO5YIKIDYNFL"
+base45, "RRFF.OEB$D5/DZ24"
 base58flickr, "Z7Pznk19XTTzBtx"
 base58btc, "z7paNL19xttacUY"
 base64, "meWVzIG1hbmkgIQ"
 base64pad, "MeWVzIG1hbmkgIQ=="
 base64url, "ueWVzIG1hbmkgIQ"
 base64urlpad, "UeWVzIG1hbmkgIQ=="
+proquint, "pro-lojoj-lasob-kujod-kunon-fabod"
 base256emoji, "🚀🏃✋🌈😅🌷🤤😻🌟😅👏"
diff --git a/tests/case_insensitivity.csv b/tests/case_insensitivity.csv
index 3037d9c..c292cd8 100644
--- a/tests/case_insensitivity.csv
+++ b/tests/case_insensitivity.csv
@@ -11,3 +11,4 @@ base32hexpad, "td1imor3f41RMUSJCCG======"
 base32hexpadupper, "Td1imor3f41RMUSJCCG======"
 base36, "kfUvrsIvVnfRbjWaJo"
 base36upper, "KfUVrSIVVnFRbJWAJo"
+base45, "R+8d vd82ek4f.kea2"
diff --git a/tests/leading_zero.csv b/tests/leading_zero.csv
index c9bfc7e..a342b6a 100644
--- a/tests/leading_zero.csv
+++ b/tests/leading_zero.csv
@@ -15,6 +15,7 @@ base32hexpadupper, "T01SMASP0DLGMSQ9044======"
 base32z, "hybhskh3ypiosh4jyrr"
 base36, "k02lcpzo5yikidynfl"
 base36upper, "K02LCPZO5YIKIDYNFL"
+base45, "RV206$CL44CEC2DDX0"
 base58flickr, "Z17Pznk19XTTzBtx"
 base58btc, "z17paNL19xttacUY"
 base64, "mAHllcyBtYW5pICE"
diff --git a/tests/two_leading_zeros.csv b/tests/two_leading_zeros.csv
index f591063..09fbc0f 100644
--- a/tests/two_leading_zeros.csv
+++ b/tests/two_leading_zeros.csv
@@ -15,10 +15,12 @@ base32hexpadupper, "T0007IPBJ41MM2RJ940GG===="
 base32z, "hyyy813murbssn5ujryoo"
 base36, "k002lcpzo5yikidynfl"
 base36upper, "K002LCPZO5YIKIDYNFL"
+base45, "R000RFF.OEB$D5/DZ24"
 base58flickr, "Z117Pznk19XTTzBtx"
 base58btc, "z117paNL19xttacUY"
 base64, "mAAB5ZXMgbWFuaSAh"
 base64pad, "MAAB5ZXMgbWFuaSAh"
 base64url, "uAAB5ZXMgbWFuaSAh"
 base64urlpad, "UAAB5ZXMgbWFuaSAh"
+proquint, "pro-babab-lojoj-lasob-kujod-kunon-fabod"
 base256emoji, "🚀🚀🚀🏃✋🌈😅🌷🤤😻🌟😅👏"

From c79d7be53669819e6f945d79f96f9a5ce641c4f9 Mon Sep 17 00:00:00 2001
From: Rod Vagg <rod@vagg.org>
Date: Mon, 11 May 2026 21:02:28 +1000
Subject: [PATCH 2/2] fix(spec): refine Base45 and Proquint encoding rules

---
 rfcs/Proquint.md             | 16 +++++++++++++++-
 tests/case_insensitivity.csv |  1 -
 tests/leading_zero.csv       |  1 +
 3 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/rfcs/Proquint.md b/rfcs/Proquint.md
index cc4a154..b0fe7ac 100644
--- a/rfcs/Proquint.md
+++ b/rfcs/Proquint.md
@@ -13,4 +13,18 @@ For example, the proquint encoding of the bytestring `[127, 0, 0, 1]` (the data
 
 ```
 pro-lusab-babad
-```
\ No newline at end of file
+```
+
+## Odd-byte inputs
+
+The original proquint specification operates on 16-bit chunks and is silent on inputs whose length is not a multiple of two bytes. Multibase requires arbitrary byte sequences to be encodable, so this document specifies the following extension:
+
+When the input has an odd number of bytes, every pair of bytes is encoded as a 5-character `CVCVC` block as usual, and the final byte is encoded as a 3-character `CVC` block representing the high 8 bits of a 16-bit value whose low 8 bits are zero. The trailing `CVC` block is joined to the preceding blocks with `-` in the usual way.
+
+For example, the single byte `[0x21]` (`!`) is encoded as:
+
+```
+pro-fah
+```
+
+The second consonant in the trailing `CVC` block carries the two least-significant bits of the input byte in its two most-significant bits; its two least-significant bits MUST be zero. Decoders MUST reject any trailing `CVC` block where this is not the case, so that the encoding is canonical and bijective. The four valid trailing consonants are `b`, `h`, `m`, and `s`.
diff --git a/tests/case_insensitivity.csv b/tests/case_insensitivity.csv
index c292cd8..3037d9c 100644
--- a/tests/case_insensitivity.csv
+++ b/tests/case_insensitivity.csv
@@ -11,4 +11,3 @@ base32hexpad, "td1imor3f41RMUSJCCG======"
 base32hexpadupper, "Td1imor3f41RMUSJCCG======"
 base36, "kfUvrsIvVnfRbjWaJo"
 base36upper, "KfUVrSIVVnFRbJWAJo"
-base45, "R+8d vd82ek4f.kea2"
diff --git a/tests/leading_zero.csv b/tests/leading_zero.csv
index a342b6a..db840e3 100644
--- a/tests/leading_zero.csv
+++ b/tests/leading_zero.csv
@@ -22,4 +22,5 @@ base64, "mAHllcyBtYW5pICE"
 base64pad, "MAHllcyBtYW5pICE="
 base64url, "uAHllcyBtYW5pICE"
 base64urlpad, "UAHllcyBtYW5pICE="
+proquint, "pro-badun-kijug-fadot-kajov-kohob-fah"
 base256emoji, "🚀🚀🏃✋🌈😅🌷🤤😻🌟😅👏"