docs: correct RSA-OAEP plaintext size limit - #339
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HamdaanAliQuatil merged 1 commit intoJul 24, 2026
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mfazrinizar
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July 24, 2026 18:40
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Summary
Corrects the documented RSA-OAEP plaintext size limit.
The previous formula mixed bit and byte units and stated that a 2048-bit RSA key with SHA-256 could encrypt 191 bytes. The PKCS #1 limit is:
modulusByteLength - 2 * hashByteLength - 2For a 2048-bit key with SHA-256, the maximum plaintext size is 190 bytes.
This updates both the reusable RSA-OAEP message-size documentation and the
encryptBytesdocumentation. There are no behavior changes.Testing
dart format --output=none --set-exit-if-changed .dart analyzedart doc --dry-rundart test test/webcrypto_test.dart -p vm -n RSA-OAEPgit diff --check