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added warning about last bit being ignored on scalars

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Orson Peters 2013-02-04 18:12:19 +01:00
parent 75216d602b
commit c0e8d63943
1 changed files with 3 additions and 1 deletions
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@ -91,7 +91,9 @@ Adds `scalar` to the given key pair where scalar is a 32 byte buffer (possibly
generated with `ed25519_create_seed`), generating a new key pair. You can
calculate the public key sum without knowing the private key and vice versa by
passing in NULL for the key you don't know. This is useful for enforcing
randomness on a key pair while only knowing the public key, among other things.
randomness on a key pair while only knowing the public key, among other things.
Warning: the last bit of the scalar is ignored - if comparing scalars make sure
to clear it with `scalar[31] &= 127`.
Example
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