diff --git a/src/Makefile.am b/src/Makefile.am index 2e297d3dac7..b2e13fb6cb4 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -344,6 +344,8 @@ crypto_libbitcoin_crypto_base_a_SOURCES = \ crypto/hmac_sha256.h \ crypto/hmac_sha512.cpp \ crypto/hmac_sha512.h \ + crypto/poly1305.h \ + crypto/poly1305.cpp \ crypto/ripemd160.cpp \ crypto/ripemd160.h \ crypto/sha1.cpp \ diff --git a/src/crypto/poly1305.cpp b/src/crypto/poly1305.cpp new file mode 100644 index 00000000000..8a86c9601ce --- /dev/null +++ b/src/crypto/poly1305.cpp @@ -0,0 +1,141 @@ +// Copyright (c) 2019 The Bitcoin Core developers +// Distributed under the MIT software license, see the accompanying +// file COPYING or http://www.opensource.org/licenses/mit-license.php. + +// Based on the public domain implementation by Andrew Moon +// poly1305-donna-unrolled.c from https://github.com/floodyberry/poly1305-donna + +#include +#include + +#include + +#define mul32x32_64(a,b) ((uint64_t)(a) * (b)) + +void poly1305_auth(unsigned char out[POLY1305_TAGLEN], const unsigned char *m, size_t inlen, const unsigned char key[POLY1305_KEYLEN]) { + uint32_t t0,t1,t2,t3; + uint32_t h0,h1,h2,h3,h4; + uint32_t r0,r1,r2,r3,r4; + uint32_t s1,s2,s3,s4; + uint32_t b, nb; + size_t j; + uint64_t t[5]; + uint64_t f0,f1,f2,f3; + uint64_t g0,g1,g2,g3,g4; + uint64_t c; + unsigned char mp[16]; + + /* clamp key */ + t0 = ReadLE32(key+0); + t1 = ReadLE32(key+4); + t2 = ReadLE32(key+8); + t3 = ReadLE32(key+12); + + /* precompute multipliers */ + r0 = t0 & 0x3ffffff; t0 >>= 26; t0 |= t1 << 6; + r1 = t0 & 0x3ffff03; t1 >>= 20; t1 |= t2 << 12; + r2 = t1 & 0x3ffc0ff; t2 >>= 14; t2 |= t3 << 18; + r3 = t2 & 0x3f03fff; t3 >>= 8; + r4 = t3 & 0x00fffff; + + s1 = r1 * 5; + s2 = r2 * 5; + s3 = r3 * 5; + s4 = r4 * 5; + + /* init state */ + h0 = 0; + h1 = 0; + h2 = 0; + h3 = 0; + h4 = 0; + + /* full blocks */ + if (inlen < 16) goto poly1305_donna_atmost15bytes; +poly1305_donna_16bytes: + m += 16; + inlen -= 16; + + t0 = ReadLE32(m-16); + t1 = ReadLE32(m-12); + t2 = ReadLE32(m-8); + t3 = ReadLE32(m-4); + + h0 += t0 & 0x3ffffff; + h1 += ((((uint64_t)t1 << 32) | t0) >> 26) & 0x3ffffff; + h2 += ((((uint64_t)t2 << 32) | t1) >> 20) & 0x3ffffff; + h3 += ((((uint64_t)t3 << 32) | t2) >> 14) & 0x3ffffff; + h4 += (t3 >> 8) | (1 << 24); + + +poly1305_donna_mul: + t[0] = mul32x32_64(h0,r0) + mul32x32_64(h1,s4) + mul32x32_64(h2,s3) + mul32x32_64(h3,s2) + mul32x32_64(h4,s1); + t[1] = mul32x32_64(h0,r1) + mul32x32_64(h1,r0) + mul32x32_64(h2,s4) + mul32x32_64(h3,s3) + mul32x32_64(h4,s2); + t[2] = mul32x32_64(h0,r2) + mul32x32_64(h1,r1) + mul32x32_64(h2,r0) + mul32x32_64(h3,s4) + mul32x32_64(h4,s3); + t[3] = mul32x32_64(h0,r3) + mul32x32_64(h1,r2) + mul32x32_64(h2,r1) + mul32x32_64(h3,r0) + mul32x32_64(h4,s4); + t[4] = mul32x32_64(h0,r4) + mul32x32_64(h1,r3) + mul32x32_64(h2,r2) + mul32x32_64(h3,r1) + mul32x32_64(h4,r0); + + h0 = (uint32_t)t[0] & 0x3ffffff; c = (t[0] >> 26); + t[1] += c; h1 = (uint32_t)t[1] & 0x3ffffff; b = (uint32_t)(t[1] >> 26); + t[2] += b; h2 = (uint32_t)t[2] & 0x3ffffff; b = (uint32_t)(t[2] >> 26); + t[3] += b; h3 = (uint32_t)t[3] & 0x3ffffff; b = (uint32_t)(t[3] >> 26); + t[4] += b; h4 = (uint32_t)t[4] & 0x3ffffff; b = (uint32_t)(t[4] >> 26); + h0 += b * 5; + + if (inlen >= 16) goto poly1305_donna_16bytes; + + /* final bytes */ +poly1305_donna_atmost15bytes: + if (!inlen) goto poly1305_donna_finish; + + for (j = 0; j < inlen; j++) mp[j] = m[j]; + mp[j++] = 1; + for (; j < 16; j++) mp[j] = 0; + inlen = 0; + + t0 = ReadLE32(mp+0); + t1 = ReadLE32(mp+4); + t2 = ReadLE32(mp+8); + t3 = ReadLE32(mp+12); + + h0 += t0 & 0x3ffffff; + h1 += ((((uint64_t)t1 << 32) | t0) >> 26) & 0x3ffffff; + h2 += ((((uint64_t)t2 << 32) | t1) >> 20) & 0x3ffffff; + h3 += ((((uint64_t)t3 << 32) | t2) >> 14) & 0x3ffffff; + h4 += (t3 >> 8); + + goto poly1305_donna_mul; + +poly1305_donna_finish: + b = h0 >> 26; h0 = h0 & 0x3ffffff; + h1 += b; b = h1 >> 26; h1 = h1 & 0x3ffffff; + h2 += b; b = h2 >> 26; h2 = h2 & 0x3ffffff; + h3 += b; b = h3 >> 26; h3 = h3 & 0x3ffffff; + h4 += b; b = h4 >> 26; h4 = h4 & 0x3ffffff; + h0 += b * 5; b = h0 >> 26; h0 = h0 & 0x3ffffff; + h1 += b; + + g0 = h0 + 5; b = g0 >> 26; g0 &= 0x3ffffff; + g1 = h1 + b; b = g1 >> 26; g1 &= 0x3ffffff; + g2 = h2 + b; b = g2 >> 26; g2 &= 0x3ffffff; + g3 = h3 + b; b = g3 >> 26; g3 &= 0x3ffffff; + g4 = h4 + b - (1 << 26); + + b = (g4 >> 31) - 1; + nb = ~b; + h0 = (h0 & nb) | (g0 & b); + h1 = (h1 & nb) | (g1 & b); + h2 = (h2 & nb) | (g2 & b); + h3 = (h3 & nb) | (g3 & b); + h4 = (h4 & nb) | (g4 & b); + + f0 = ((h0 ) | (h1 << 26)) + (uint64_t)ReadLE32(&key[16]); + f1 = ((h1 >> 6) | (h2 << 20)) + (uint64_t)ReadLE32(&key[20]); + f2 = ((h2 >> 12) | (h3 << 14)) + (uint64_t)ReadLE32(&key[24]); + f3 = ((h3 >> 18) | (h4 << 8)) + (uint64_t)ReadLE32(&key[28]); + + WriteLE32(&out[ 0], f0); f1 += (f0 >> 32); + WriteLE32(&out[ 4], f1); f2 += (f1 >> 32); + WriteLE32(&out[ 8], f2); f3 += (f2 >> 32); + WriteLE32(&out[12], f3); +} diff --git a/src/crypto/poly1305.h b/src/crypto/poly1305.h new file mode 100644 index 00000000000..1598b013b96 --- /dev/null +++ b/src/crypto/poly1305.h @@ -0,0 +1,17 @@ +// Copyright (c) 2019 The Bitcoin Core developers +// Distributed under the MIT software license, see the accompanying +// file COPYING or http://www.opensource.org/licenses/mit-license.php. + +#ifndef BITCOIN_CRYPTO_POLY1305_H +#define BITCOIN_CRYPTO_POLY1305_H + +#include +#include + +#define POLY1305_KEYLEN 32 +#define POLY1305_TAGLEN 16 + +void poly1305_auth(unsigned char out[POLY1305_TAGLEN], const unsigned char *m, size_t inlen, + const unsigned char key[POLY1305_KEYLEN]); + +#endif // BITCOIN_CRYPTO_POLY1305_H diff --git a/src/test/crypto_tests.cpp b/src/test/crypto_tests.cpp index 86cb00a78f0..352cff37d1f 100644 --- a/src/test/crypto_tests.cpp +++ b/src/test/crypto_tests.cpp @@ -4,6 +4,7 @@ #include #include +#include #include #include #include @@ -200,6 +201,17 @@ static void TestChaCha20(const std::string &hexkey, uint64_t nonce, uint64_t see BOOST_CHECK(out == outres); } +static void TestPoly1305(const std::string &hexmessage, const std::string &hexkey, const std::string& hextag) +{ + std::vector key = ParseHex(hexkey); + std::vector m = ParseHex(hexmessage); + std::vector tag = ParseHex(hextag); + std::vector tagres; + tagres.resize(POLY1305_TAGLEN); + poly1305_auth(tagres.data(), m.data(), m.size(), key.data()); + BOOST_CHECK(tag == tagres); +} + static std::string LongTestString() { std::string ret; for (int i=0; i<200000; i++) { @@ -524,6 +536,76 @@ BOOST_AUTO_TEST_CASE(chacha20_testvector) "fab78c9"); } +BOOST_AUTO_TEST_CASE(poly1305_testvector) +{ + // RFC 7539, section 2.5.2. + TestPoly1305("43727970746f6772617068696320466f72756d2052657365617263682047726f7570", + "85d6be7857556d337f4452fe42d506a80103808afb0db2fd4abff6af4149f51b", + "a8061dc1305136c6c22b8baf0c0127a9"); + + // RFC 7539, section A.3. + TestPoly1305("00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000" + "000000000000000000000000000", + "0000000000000000000000000000000000000000000000000000000000000000", + "00000000000000000000000000000000"); + + TestPoly1305("416e79207375626d697373696f6e20746f20746865204945544620696e74656e6465642062792074686520436f6e747269627" + "5746f7220666f72207075626c69636174696f6e20617320616c6c206f722070617274206f6620616e204945544620496e7465" + "726e65742d4472616674206f722052464320616e6420616e792073746174656d656e74206d6164652077697468696e2074686" + "520636f6e74657874206f6620616e204945544620616374697669747920697320636f6e7369646572656420616e2022494554" + "4620436f6e747269627574696f6e222e20537563682073746174656d656e747320696e636c756465206f72616c20737461746" + "56d656e747320696e20494554462073657373696f6e732c2061732077656c6c206173207772697474656e20616e6420656c65" + "6374726f6e696320636f6d6d756e69636174696f6e73206d61646520617420616e792074696d65206f7220706c6163652c207" + "768696368206172652061646472657373656420746f", + "0000000000000000000000000000000036e5f6b5c5e06070f0efca96227a863e", + "36e5f6b5c5e06070f0efca96227a863e"); + + TestPoly1305("416e79207375626d697373696f6e20746f20746865204945544620696e74656e6465642062792074686520436f6e747269627" + "5746f7220666f72207075626c69636174696f6e20617320616c6c206f722070617274206f6620616e204945544620496e7465" + "726e65742d4472616674206f722052464320616e6420616e792073746174656d656e74206d6164652077697468696e2074686" + "520636f6e74657874206f6620616e204945544620616374697669747920697320636f6e7369646572656420616e2022494554" + "4620436f6e747269627574696f6e222e20537563682073746174656d656e747320696e636c756465206f72616c20737461746" + "56d656e747320696e20494554462073657373696f6e732c2061732077656c6c206173207772697474656e20616e6420656c65" + "6374726f6e696320636f6d6d756e69636174696f6e73206d61646520617420616e792074696d65206f7220706c6163652c207" + "768696368206172652061646472657373656420746f", + "36e5f6b5c5e06070f0efca96227a863e00000000000000000000000000000000", + "f3477e7cd95417af89a6b8794c310cf0"); + + TestPoly1305("2754776173206272696c6c69672c20616e642074686520736c6974687920746f7665730a446964206779726520616e6420676" + "96d626c6520696e2074686520776162653a0a416c6c206d696d737920776572652074686520626f726f676f7665732c0a416e" + "6420746865206d6f6d65207261746873206f757467726162652e", + "1c9240a5eb55d38af333888604f6b5f0473917c1402b80099dca5cbc207075c0", + "4541669a7eaaee61e708dc7cbcc5eb62"); + + TestPoly1305("ffffffffffffffffffffffffffffffff", + "0200000000000000000000000000000000000000000000000000000000000000", + "03000000000000000000000000000000"); + + TestPoly1305("02000000000000000000000000000000", + "02000000000000000000000000000000ffffffffffffffffffffffffffffffff", + "03000000000000000000000000000000"); + + TestPoly1305("fffffffffffffffffffffffffffffffff0ffffffffffffffffffffffffffffff11000000000000000000000000000000", + "0100000000000000000000000000000000000000000000000000000000000000", + "05000000000000000000000000000000"); + + TestPoly1305("fffffffffffffffffffffffffffffffffbfefefefefefefefefefefefefefefe01010101010101010101010101010101", + "0100000000000000000000000000000000000000000000000000000000000000", + "00000000000000000000000000000000"); + + TestPoly1305("fdffffffffffffffffffffffffffffff", + "0200000000000000000000000000000000000000000000000000000000000000", + "faffffffffffffffffffffffffffffff"); + + TestPoly1305("e33594d7505e43b900000000000000003394d7505e4379cd01000000000000000000000000000000000000000000000001000000000000000000000000000000", + "0100000000000000040000000000000000000000000000000000000000000000", + "14000000000000005500000000000000"); + + TestPoly1305("e33594d7505e43b900000000000000003394d7505e4379cd010000000000000000000000000000000000000000000000", + "0100000000000000040000000000000000000000000000000000000000000000", + "13000000000000000000000000000000"); +} + BOOST_AUTO_TEST_CASE(countbits_tests) { FastRandomContext ctx;