/*public static void crypto_sign( * byte[] sm, out int smlen, * byte[] m, int mlen, * byte[] sk * ) * { * byte[] az = new byte[64]; * byte[] r = new byte[64]; * byte[] hram = new byte[64]; * GroupElementP3 R; * int i; * * Helpers.crypto_hash_sha512(az, sk, 0, 32); * az[0] &= 248; * az[31] &= 63; * az[31] |= 64; * * smlen = mlen + 64; * for (i = 0; i < mlen; ++i) sm[64 + i] = m[i]; * for (i = 0; i < 32; ++i) sm[32 + i] = az[32 + i]; * Helpers.crypto_hash_sha512(r, sm, 32, mlen + 32); * for (i = 0; i < 32; ++i) sm[32 + i] = sk[32 + i]; * * ScalarOperations.sc_reduce(r); * GroupOperations.ge_scalarmult_base(out R, r, 0); * GroupOperations.ge_p3_tobytes(sm, 0, ref R); * * Helpers.crypto_hash_sha512(hram, sm, 0, mlen + 64); * ScalarOperations.sc_reduce(hram); * var sm32 = new byte[32]; * Array.Copy(sm, 32, sm32, 0, 32); * ScalarOperations.sc_muladd(sm32, hram, az, r); * Array.Copy(sm32, 0, sm, 32, 32); * }*/ public static void crypto_sign2( byte[] sig, int sigoffset, byte[] m, int moffset, int mlen, byte[] sk, int skoffset) { byte[] az; byte[] r; byte[] hram; GroupElementP3 R; var blake2bConfig = new Blake2BConfig { OutputSizeInBytes = 64 }; var hasher = Blake2B.Create(blake2bConfig); //var hasher = new Sha512(); { hasher.Update(sk, skoffset, 32); az = hasher.Finish(); ScalarOperations.sc_clamp(az, 0); hasher.Init(); hasher.Update(az, 32, 32); hasher.Update(m, moffset, mlen); r = hasher.Finish(); ScalarOperations.sc_reduce(r); GroupOperations.ge_scalarmult_base(out R, r, 0); GroupOperations.ge_p3_tobytes(sig, sigoffset, ref R); hasher.Init(); hasher.Update(sig, sigoffset, 32); hasher.Update(sk, skoffset + 32, 32); hasher.Update(m, moffset, mlen); hram = hasher.Finish(); ScalarOperations.sc_reduce(hram); var s = new byte[32]; //todo: remove allocation Array.Copy(sig, sigoffset + 32, s, 0, 32); ScalarOperations.sc_muladd(s, hram, az, r); Array.Copy(s, 0, sig, sigoffset + 32, 32); CryptoBytes.Wipe(s); } }
/*public static void crypto_sign( * byte[] sm, out int smlen, * byte[] m, int mlen, * byte[] sk * ) * { * byte[] az = new byte[64]; * byte[] r = new byte[64]; * byte[] hram = new byte[64]; * GroupElementP3 R; * int i; * * Helpers.crypto_hash_sha512(az, sk, 0, 32); * az[0] &= 248; * az[31] &= 63; * az[31] |= 64; * * smlen = mlen + 64; * for (i = 0; i < mlen; ++i) sm[64 + i] = m[i]; * for (i = 0; i < 32; ++i) sm[32 + i] = az[32 + i]; * Helpers.crypto_hash_sha512(r, sm, 32, mlen + 32); * for (i = 0; i < 32; ++i) sm[32 + i] = sk[32 + i]; * * ScalarOperations.sc_reduce(r); * GroupOperations.ge_scalarmult_base(out R, r, 0); * GroupOperations.ge_p3_tobytes(sm, 0, ref R); * * Helpers.crypto_hash_sha512(hram, sm, 0, mlen + 64); * ScalarOperations.sc_reduce(hram); * var sm32 = new byte[32]; * Array.Copy(sm, 32, sm32, 0, 32); * ScalarOperations.sc_muladd(sm32, hram, az, r); * Array.Copy(sm32, 0, sm, 32, 32); * }*/ public static void crypto_sign2( byte[] sig, int sigoffset, byte[] m, int moffset, int mlen, byte[] sk, int skoffset) { byte[] az = new byte[64]; byte[] r = new byte[64]; byte[] hram = new byte[64]; GroupElementP3 R; var DigestSha3 = new KeccakDigest(512); { DigestSha3.BlockUpdate(sk, skoffset, 32); DigestSha3.DoFinal(az, 0); ScalarOperations.sc_clamp(az, 0); DigestSha3.Reset(); DigestSha3.BlockUpdate(az, 32, 32); DigestSha3.BlockUpdate(m, moffset, mlen); DigestSha3.DoFinal(r, 0); ScalarOperations.sc_reduce(r); GroupOperations.ge_scalarmult_base(out R, r, 0); GroupOperations.ge_p3_tobytes(sig, sigoffset, ref R); DigestSha3.Reset(); DigestSha3.BlockUpdate(sig, sigoffset, 32); DigestSha3.BlockUpdate(sk, skoffset + 32, 32); DigestSha3.BlockUpdate(m, moffset, mlen); DigestSha3.DoFinal(hram, 0); ScalarOperations.sc_reduce(hram); var s = new byte[32]; //todo: remove allocation Array.Copy(sig, sigoffset + 32, s, 0, 32); ScalarOperations.sc_muladd(s, hram, az, r); Array.Copy(s, 0, sig, sigoffset + 32, 32); CryptoBytes.Wipe(s); } }
/*public static void crypto_sign( * byte[] sm, out int smlen, * byte[] m, int mlen, * byte[] sk * ) * { * byte[] az = new byte[64]; * byte[] r = new byte[64]; * byte[] hram = new byte[64]; * GroupElementP3 R; * int i; * * Helpers.crypto_hash_sha512(az, sk, 0, 32); * az[0] &= 248; * az[31] &= 63; * az[31] |= 64; * * smlen = mlen + 64; * for (i = 0; i < mlen; ++i) sm[64 + i] = m[i]; * for (i = 0; i < 32; ++i) sm[32 + i] = az[32 + i]; * Helpers.crypto_hash_sha512(r, sm, 32, mlen + 32); * for (i = 0; i < 32; ++i) sm[32 + i] = sk[32 + i]; * * ScalarOperations.sc_reduce(r); * GroupOperations.ge_scalarmult_base(out R, r, 0); * GroupOperations.ge_p3_tobytes(sm, 0, ref R); * * Helpers.crypto_hash_sha512(hram, sm, 0, mlen + 64); * ScalarOperations.sc_reduce(hram); * var sm32 = new byte[32]; * Array.Copy(sm, 32, sm32, 0, 32); * ScalarOperations.sc_muladd(sm32, hram, az, r); * Array.Copy(sm32, 0, sm, 32, 32); * }*/ public static void crypto_sign2( byte[] sig, int sigoffset, byte[] m, int moffset, int mlen, byte[] sk, int skoffset) { byte[] az; byte[] r; byte[] hram; GroupElementP3 R; var hasher = Blake2Fast.Blake2b.CreateIncrementalHasher(64); //var hasher = new Sha512(); { hasher.Update(new ArraySegment <byte>(sk, skoffset, 32)); az = hasher.Finish(); ScalarOperations.sc_clamp(az, 0); hasher = Blake2Fast.Blake2b.CreateIncrementalHasher(64); hasher.Update(new ArraySegment <byte>(az, 32, 32)); hasher.Update(new ArraySegment <byte>(m, moffset, mlen)); r = hasher.Finish(); ScalarOperations.sc_reduce(r); GroupOperations.ge_scalarmult_base(out R, r, 0); GroupOperations.ge_p3_tobytes(sig, sigoffset, ref R); hasher = Blake2Fast.Blake2b.CreateIncrementalHasher(64); hasher.Update(new ArraySegment <byte>(sig, sigoffset, 32)); hasher.Update(new ArraySegment <byte>(sk, skoffset + 32, 32)); hasher.Update(new ArraySegment <byte>(m, moffset, mlen)); hram = hasher.Finish(); ScalarOperations.sc_reduce(hram); var s = new byte[32]; //todo: remove allocation Array.Copy(sig, sigoffset + 32, s, 0, 32); ScalarOperations.sc_muladd(s, hram, az, r); Array.Copy(s, 0, sig, sigoffset + 32, 32); CryptoBytes.Wipe(s); } }