f740d717bd
The orders of the curves in crypto/elliptic are all very close to a power of two. None the less, there is a tiny bias in the private key selection. This change makes the distribution uniform by resampling in the case that a private key is >= to the order of the curve. (It also switches from using BitSize to Params().N.BitLen() because, although they're the same value here, the latter is technically the correct thing to do.) The private key sampling and nonce sampling in crypto/ecdsa don't have this issue. Fixes #11082. Change-Id: Ie2aad563209a529fa1cab522abaf5fd505c7269a Reviewed-on: https://go-review.googlesource.com/17460 Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org> Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> Reviewed-by: Russ Cox <rsc@golang.org> |
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