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| author | Peter Dettman <peter.dettman@bouncycastle.org> | 2016-02-02 18:09:16 +0700 |
|---|---|---|
| committer | Peter Dettman <peter.dettman@bouncycastle.org> | 2016-02-02 18:09:16 +0700 |
| commit | 745143a518d71a026e142007b6a4bc831e2ae13b (patch) | |
| tree | 3af4cc8143e8c2c2f85816443a0284e58d4baef6 /crypto/src/math/ec/custom/sec/SecP256R1Field.cs | |
| parent | Just check the final ReadByte return value (diff) | |
| download | BouncyCastle.NET-ed25519-745143a518d71a026e142007b6a4bc831e2ae13b.tar.xz | |
Additional temp values in reduction
Diffstat (limited to 'crypto/src/math/ec/custom/sec/SecP256R1Field.cs')
| -rw-r--r-- | crypto/src/math/ec/custom/sec/SecP256R1Field.cs | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/crypto/src/math/ec/custom/sec/SecP256R1Field.cs b/crypto/src/math/ec/custom/sec/SecP256R1Field.cs index 11594b2ba..5b3de6d36 100644 --- a/crypto/src/math/ec/custom/sec/SecP256R1Field.cs +++ b/crypto/src/math/ec/custom/sec/SecP256R1Field.cs @@ -110,9 +110,10 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec long t4 = xx12 + xx13; long t5 = xx13 + xx14; long t6 = xx14 + xx15; + long t7 = t5 - t0; long cc = 0; - cc += (long)xx[0] + t0 - t3 - t5; + cc += (long)xx[0] - t3 - t7; z[0] = (uint)cc; cc >>= 32; cc += (long)xx[1] + t1 - t4 - t6; @@ -121,7 +122,7 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec cc += (long)xx[2] + t2 - t5; z[2] = (uint)cc; cc >>= 32; - cc += (long)xx[3] + (t3 << 1) + xx13 - xx15 - t0; + cc += (long)xx[3] + (t3 << 1) + t7 - t6; z[3] = (uint)cc; cc >>= 32; cc += (long)xx[4] + (t4 << 1) + xx14 - t1; @@ -130,7 +131,7 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec cc += (long)xx[5] + (t5 << 1) - t2; z[5] = (uint)cc; cc >>= 32; - cc += (long)xx[6] + (t6 << 1) + t5 - t0; + cc += (long)xx[6] + (t6 << 1) + t7; z[6] = (uint)cc; cc >>= 32; cc += (long)xx[7] + (xx15 << 1) + xx08 - t2 - t4; |