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crypto/elliptic: document the Name and names of each curve

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See https://tools.ietf.org/html/rfc8422#appendix-A for a helpful table.

Also, commit to keeping them singletons, as that assumption is already
made all over the place in the ecosystem.

Fixes #34193

Change-Id: I2ec50fa18bb80e11d6101f2562df60b5e27d4f66
Reviewed-on: https://go-review.googlesource.com/c/go/+/218921
Run-TryBot: Filippo Valsorda <filippo@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Filippo Valsorda 2020-02-10 17:29:13 -05:00
parent ab5d9f5831
commit 25da21ddc9
1 changed files with 16 additions and 3 deletions
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19
src/crypto/elliptic/elliptic.go
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@ -372,7 +372,12 @@ func initP521() {
p521.BitSize = 521
}
// P256 returns a Curve which implements P-256 (see FIPS 186-3, section D.2.3)
// P256 returns a Curve which implements NIST P-256 (FIPS 186-3, section D.2.3),
// also known as secp256r1 or prime256v1. The CurveParams.Name of this Curve is
// "P-256".
//
// Multiple invocations of this function will return the same value, so it can
// be used for equality checks and switch statements.
//
// The cryptographic operations are implemented using constant-time algorithms.
func P256() Curve {
@ -380,7 +385,11 @@ func P256() Curve {
return p256
}
// P384 returns a Curve which implements P-384 (see FIPS 186-3, section D.2.4)
// P384 returns a Curve which implements NIST P-384 (FIPS 186-3, section D.2.4),
// also known as secp384r1. The CurveParams.Name of this Curve is "P-384".
//
// Multiple invocations of this function will return the same value, so it can
// be used for equality checks and switch statements.
//
// The cryptographic operations do not use constant-time algorithms.
func P384() Curve {
@ -388,7 +397,11 @@ func P384() Curve {
return p384
}
// P521 returns a Curve which implements P-521 (see FIPS 186-3, section D.2.5)
// P521 returns a Curve which implements NIST P-521 (FIPS 186-3, section D.2.5),
// also known as secp521r1. The CurveParams.Name of this Curve is "P-521".
//
// Multiple invocations of this function will return the same value, so it can
// be used for equality checks and switch statements.
//
// The cryptographic operations do not use constant-time algorithms.
func P521() Curve {