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fix(wecom): pad base64 AES key before decode (salvage #17040) #20177

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Merged
teknium1 merged 2 commits into from
May 5, 2026
+3 −0
Merged

fix(wecom): pad base64 AES key before decode (salvage #17040) #20177

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31eadb5
fix(wecom): pad base64 AES key before decode
chengoak Apr 28, 2026
fca8f25
chore: AUTHOR_MAP entry for chengoak
teknium1 May 5, 2026
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2 changes: 2 additions & 0 deletions gateway/platforms/wecom.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1015,6 +1015,8 @@ def _decrypt_file_bytes(encrypted_data: bytes, aes_key: str) -> bytes:
if not aes_key:
raise ValueError("aes_key is required")

# WeCom doesn't pad base64 keys; add padding if needed
aes_key = aes_key + '=' * ((4 - len(aes_key) % 4) % 4)
key = base64.b64decode(aes_key)
if len(key) != 32:
raise ValueError(f"Invalid WeCom AES key length: expected 32 bytes, got {len(key)}")
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1 change: 1 addition & 0 deletions scripts/release.py
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Expand Up @@ -60,6 +60,7 @@
"74554762+wmagev@users.noreply.github.com": "wmagev",
"ashermorse@icloud.com": "ashermorse",
"happy5318@users.noreply.github.com": "happy5318",
"chengoak@users.noreply.github.com": "chengoak",
"emelyanenko.kirill@gmail.com": "EmelyanenkoK",
# Matrix parity salvage batch (April 2026)
"sr@samirusani": "samrusani",
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