diff options
Diffstat (limited to 'crypto/src/crypto/tls/NamedCurve.cs')
| -rw-r--r-- | crypto/src/crypto/tls/NamedCurve.cs | 123 |
1 files changed, 64 insertions, 59 deletions
diff --git a/crypto/src/crypto/tls/NamedCurve.cs b/crypto/src/crypto/tls/NamedCurve.cs index c8ee189aa..b8aa0ecde 100644 --- a/crypto/src/crypto/tls/NamedCurve.cs +++ b/crypto/src/crypto/tls/NamedCurve.cs @@ -6,67 +6,72 @@ using Org.BouncyCastle.Crypto.Parameters; namespace Org.BouncyCastle.Crypto.Tls { - /// <summary> - /// RFC 4492 5.1.1 - /// The named curves defined here are those specified in SEC 2 [13]. Note that many of - /// these curves are also recommended in ANSI X9.62 [7] and FIPS 186-2 [11]. Values 0xFE00 - /// through 0xFEFF are reserved for private use. Values 0xFF01 and 0xFF02 indicate that the - /// client supports arbitrary prime and characteristic-2 curves, respectively (the curve - /// parameters must be encoded explicitly in ECParameters). - /// </summary> - public enum NamedCurve : int - { - sect163k1 = 1, - sect163r1 = 2, - sect163r2 = 3, - sect193r1 = 4, - sect193r2 = 5, - sect233k1 = 6, - sect233r1 = 7, - sect239k1 = 8, - sect283k1 = 9, - sect283r1 = 10, - sect409k1 = 11, - sect409r1 = 12, - sect571k1 = 13, - sect571r1 = 14, - secp160k1 = 15, - secp160r1 = 16, - secp160r2 = 17, - secp192k1 = 18, - secp192r1 = 19, - secp224k1 = 20, - secp224r1 = 21, - secp256k1 = 22, - secp256r1 = 23, - secp384r1 = 24, - secp521r1 = 25, + /// <summary> + /// RFC 4492 5.1.1 + /// The named curves defined here are those specified in SEC 2 [13]. Note that many of + /// these curves are also recommended in ANSI X9.62 [7] and FIPS 186-2 [11]. Values 0xFE00 + /// through 0xFEFF are reserved for private use. Values 0xFF01 and 0xFF02 indicate that the + /// client supports arbitrary prime and characteristic-2 curves, respectively (the curve + /// parameters must be encoded explicitly in ECParameters). + /// </summary> + public abstract class NamedCurve + { + public const int sect163k1 = 1; + public const int sect163r1 = 2; + public const int sect163r2 = 3; + public const int sect193r1 = 4; + public const int sect193r2 = 5; + public const int sect233k1 = 6; + public const int sect233r1 = 7; + public const int sect239k1 = 8; + public const int sect283k1 = 9; + public const int sect283r1 = 10; + public const int sect409k1 = 11; + public const int sect409r1 = 12; + public const int sect571k1 = 13; + public const int sect571r1 = 14; + public const int secp160k1 = 15; + public const int secp160r1 = 16; + public const int secp160r2 = 17; + public const int secp192k1 = 18; + public const int secp192r1 = 19; + public const int secp224k1 = 20; + public const int secp224r1 = 21; + public const int secp256k1 = 22; + public const int secp256r1 = 23; + public const int secp384r1 = 24; + public const int secp521r1 = 25; + + /* + * RFC 7027 + */ + public const int brainpoolP256r1 = 26; + public const int brainpoolP384r1 = 27; + public const int brainpoolP512r1 = 28; - /* - * reserved (0xFE00..0xFEFF) - */ + /* + * reserved (0xFE00..0xFEFF) + */ - arbitrary_explicit_prime_curves = 0xFF01, - arbitrary_explicit_char2_curves = 0xFF02, - } + public const int arbitrary_explicit_prime_curves = 0xFF01; + public const int arbitrary_explicit_char2_curves = 0xFF02; - internal class NamedCurveHelper - { - internal static ECDomainParameters GetECParameters(NamedCurve namedCurve) - { - if (!Enum.IsDefined(typeof(NamedCurve), namedCurve)) - return null; + public static bool IsValid(int namedCurve) + { + return (namedCurve >= sect163k1 && namedCurve <= brainpoolP512r1) + || (namedCurve >= arbitrary_explicit_prime_curves && namedCurve <= arbitrary_explicit_char2_curves); + } - string curveName = namedCurve.ToString(); - - // Lazily created the first time a particular curve is accessed - X9ECParameters ecP = SecNamedCurves.GetByName(curveName); - - if (ecP == null) - return null; - - // It's a bit inefficient to do this conversion every time - return new ECDomainParameters(ecP.Curve, ecP.G, ecP.N, ecP.H, ecP.GetSeed()); - } - } + public static bool RefersToASpecificNamedCurve(int namedCurve) + { + switch (namedCurve) + { + case arbitrary_explicit_prime_curves: + case arbitrary_explicit_char2_curves: + return false; + default: + return true; + } + } + } } |