internal/stream: reject sizes below one tag in EncryptedChunkCount#696
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sweis wants to merge 1 commit intoFiloSottile:mainfrom
Open
internal/stream: reject sizes below one tag in EncryptedChunkCount#696sweis wants to merge 1 commit intoFiloSottile:mainfrom
sweis wants to merge 1 commit intoFiloSottile:mainfrom
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EncryptedChunkCountreturned(0, nil)for negative or sub-tag-size inputs —the consistency check rounds both sides to
0and passes silently. This wouldcascade into
NewDecryptReaderAtcomputingfinalChunkIndex = -1.Fix: a valid payload always carries at least one Poly1305 tag, even for empty
plaintext. Reject anything smaller than
chacha20poly1305.Overheadup front.Test:
go test ./internal/stream/ -run TestEncryptedChunkCountRejectsSmallSizes -v