diff options
Diffstat (limited to 'core/src/main/java/org/spongycastle/crypto/tls/NamedCurve.java')
| -rw-r--r-- | core/src/main/java/org/spongycastle/crypto/tls/NamedCurve.java | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/core/src/main/java/org/spongycastle/crypto/tls/NamedCurve.java b/core/src/main/java/org/spongycastle/crypto/tls/NamedCurve.java new file mode 100644 index 00000000..8f733587 --- /dev/null +++ b/core/src/main/java/org/spongycastle/crypto/tls/NamedCurve.java @@ -0,0 +1,71 @@ +package org.spongycastle.crypto.tls; + +/** + * RFC 4492 5.1.1 + * <p> + * 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). + */ +public class NamedCurve +{ + public static final int sect163k1 = 1; + public static final int sect163r1 = 2; + public static final int sect163r2 = 3; + public static final int sect193r1 = 4; + public static final int sect193r2 = 5; + public static final int sect233k1 = 6; + public static final int sect233r1 = 7; + public static final int sect239k1 = 8; + public static final int sect283k1 = 9; + public static final int sect283r1 = 10; + public static final int sect409k1 = 11; + public static final int sect409r1 = 12; + public static final int sect571k1 = 13; + public static final int sect571r1 = 14; + public static final int secp160k1 = 15; + public static final int secp160r1 = 16; + public static final int secp160r2 = 17; + public static final int secp192k1 = 18; + public static final int secp192r1 = 19; + public static final int secp224k1 = 20; + public static final int secp224r1 = 21; + public static final int secp256k1 = 22; + public static final int secp256r1 = 23; + public static final int secp384r1 = 24; + public static final int secp521r1 = 25; + + /* + * RFC 7027 + */ + public static final int brainpoolP256r1 = 26; + public static final int brainpoolP384r1 = 27; + public static final int brainpoolP512r1 = 28; + + /* + * reserved (0xFE00..0xFEFF) + */ + + public static final int arbitrary_explicit_prime_curves = 0xFF01; + public static final int arbitrary_explicit_char2_curves = 0xFF02; + + public static boolean isValid(int namedCurve) + { + return (namedCurve >= sect163k1 && namedCurve <= brainpoolP512r1) + || (namedCurve >= arbitrary_explicit_prime_curves && namedCurve <= arbitrary_explicit_char2_curves); + } + + public static boolean refersToASpecificNamedCurve(int namedCurve) + { + switch (namedCurve) + { + case arbitrary_explicit_prime_curves: + case arbitrary_explicit_char2_curves: + return false; + default: + return true; + } + } +} |