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Document and test maximum deriveBits length for ECDH curves#289

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Syed-Moiz-Ali:feat/ecdh-derivebits-docs
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Document and test maximum deriveBits length for ECDH curves#289
Syed-Moiz-Ali wants to merge 1 commit into
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Syed-Moiz-Ali:feat/ecdh-derivebits-docs

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@Syed-Moiz-Ali

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Fixes #130

Updates \EcdhPrivateKey.deriveBits\ documentation to specify the maximum number of bits that can be derived for each supported elliptic curve:

  • \EllipticCurve.p256\ — up to 256 bits
  • \EllipticCurve.p384\ — up to 384 bits
  • \EllipticCurve.p521\ — up to 528 bits

Also adds test coverage for all three curves at their maximum derive lengths in the ECDH test runner (previously only P-256 with 32 bytes was tested).

Updates documentation on EcdhPrivateKey.deriveBits to include
the maximum number of bits that can be derived for each curve:

  * EllipticCurve.p256 — up to 256 bits
  * EllipticCurve.p384 — up to 384 bits
  * EllipticCurve.p521 — up to 528 bits

Also adds test coverage for all three curves at their maximum
derive lengths in the ECDH test runner.

Fixes google#130
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google-cla Bot commented Jun 16, 2026

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Document the maximum length in EcdhPrivateKey.deriveBits for each curve

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