From: Thomas Pornin Date: Sat, 18 Mar 2017 15:46:00 +0000 (+0100) Subject: Added "ctmulq" implementation of Poly1305 (using 64->128 multiplications when available). X-Git-Tag: v0.4~6 X-Git-Url: https://bearssl.org/gitweb//home/git/?a=commitdiff_plain;h=5db2d48b128326704cd33aff56c8b46e463f3bf6;p=BearSSL Added "ctmulq" implementation of Poly1305 (using 64->128 multiplications when available). --- diff --git a/inc/bearssl_block.h b/inc/bearssl_block.h index 88f51b2..df069a1 100644 --- a/inc/bearssl_block.h +++ b/inc/bearssl_block.h @@ -1768,4 +1768,38 @@ void br_poly1305_i15_run(const void *key, const void *iv, void *data, size_t len, const void *aad, size_t aad_len, void *tag, br_chacha20_run ichacha, int encrypt); +/** + * \brief ChaCha20+Poly1305 AEAD implementation (ctmulq). + * + * This implementation uses 64-bit multiplications (result over 128 bits). + * It is available only on platforms that offer such a primitive (in + * practice, 64-bit architectures). Use `br_poly1305_ctmulq_get()` to + * dynamically obtain a pointer to that function, or 0 if not supported. + * + * \see br_poly1305_run + * + * \param key secret key (32 bytes). + * \param iv nonce (12 bytes). + * \param data data to encrypt or decrypt. + * \param len data length (in bytes). + * \param aad additional authenticated data. + * \param aad_len length of additional authenticated data (in bytes). + * \param tag output buffer for the authentication tag. + * \param ichacha implementation of ChaCha20. + * \param encrypt non-zero for encryption, zero for decryption. + */ +void br_poly1305_ctmulq_run(const void *key, const void *iv, + void *data, size_t len, const void *aad, size_t aad_len, + void *tag, br_chacha20_run ichacha, int encrypt); + +/** + * \brief Get the ChaCha20+Poly1305 "ctmulq" implementation, if available. + * + * This function returns a pointer to the `br_poly1305_ctmulq_run()` + * function if supported on the current platform; otherwise, it returns 0. + * + * \return the ctmulq ChaCha20+Poly1305 implementation, or 0. + */ +br_poly1305_run br_poly1305_ctmulq_get(void); + #endif diff --git a/mk/Rules.mk b/mk/Rules.mk index 742f35c..e8ac590 100644 --- a/mk/Rules.mk +++ b/mk/Rules.mk @@ -1,6 +1,6 @@ # Automatically generated rules. 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$(OBJDIR)$Pssl_hashes$O $(OBJDIR)$Pssl_hs_client$O $(OBJDIR)$Pssl_hs_server$O $(OBJDIR)$Pssl_io$O $(OBJDIR)$Pssl_lru$O $(OBJDIR)$Pssl_rec_cbc$O $(OBJDIR)$Pssl_rec_chapol$O $(OBJDIR)$Pssl_rec_gcm$O $(OBJDIR)$Pssl_scert_single_ec$O $(OBJDIR)$Pssl_scert_single_rsa$O $(OBJDIR)$Pssl_server$O $(OBJDIR)$Pssl_server_full_ec$O $(OBJDIR)$Pssl_server_full_rsa$O $(OBJDIR)$Pssl_server_mine2c$O $(OBJDIR)$Pssl_server_mine2g$O $(OBJDIR)$Pssl_server_minf2c$O $(OBJDIR)$Pssl_server_minf2g$O $(OBJDIR)$Pssl_server_minr2g$O $(OBJDIR)$Pssl_server_minu2g$O $(OBJDIR)$Pssl_server_minv2g$O $(OBJDIR)$Paes_big_cbcdec$O $(OBJDIR)$Paes_big_cbcenc$O $(OBJDIR)$Paes_big_ctr$O $(OBJDIR)$Paes_big_dec$O $(OBJDIR)$Paes_big_enc$O $(OBJDIR)$Paes_common$O $(OBJDIR)$Paes_ct$O $(OBJDIR)$Paes_ct64$O $(OBJDIR)$Paes_ct64_cbcdec$O $(OBJDIR)$Paes_ct64_cbcenc$O $(OBJDIR)$Paes_ct64_ctr$O $(OBJDIR)$Paes_ct64_dec$O $(OBJDIR)$Paes_ct64_enc$O $(OBJDIR)$Paes_ct_cbcdec$O $(OBJDIR)$Paes_ct_cbcenc$O $(OBJDIR)$Paes_ct_ctr$O $(OBJDIR)$Paes_ct_dec$O $(OBJDIR)$Paes_ct_enc$O $(OBJDIR)$Paes_pwr8$O $(OBJDIR)$Paes_pwr8_cbcdec$O $(OBJDIR)$Paes_pwr8_cbcenc$O $(OBJDIR)$Paes_pwr8_ctr$O $(OBJDIR)$Paes_small_cbcdec$O $(OBJDIR)$Paes_small_cbcenc$O $(OBJDIR)$Paes_small_ctr$O $(OBJDIR)$Paes_small_dec$O $(OBJDIR)$Paes_small_enc$O $(OBJDIR)$Paes_x86ni$O $(OBJDIR)$Paes_x86ni_cbcdec$O $(OBJDIR)$Paes_x86ni_cbcenc$O $(OBJDIR)$Paes_x86ni_ctr$O $(OBJDIR)$Pchacha20_ct$O $(OBJDIR)$Pdes_ct$O $(OBJDIR)$Pdes_ct_cbcdec$O $(OBJDIR)$Pdes_ct_cbcenc$O $(OBJDIR)$Pdes_support$O $(OBJDIR)$Pdes_tab$O $(OBJDIR)$Pdes_tab_cbcdec$O $(OBJDIR)$Pdes_tab_cbcenc$O $(OBJDIR)$Ppoly1305_ctmul$O $(OBJDIR)$Ppoly1305_ctmul32$O $(OBJDIR)$Ppoly1305_i15$O $(OBJDIR)$Pskey_decoder$O $(OBJDIR)$Px509_decoder$O $(OBJDIR)$Px509_knownkey$O $(OBJDIR)$Px509_minimal$O $(OBJDIR)$Px509_minimal_full$O +OBJ = $(OBJDIR)$Pccopy$O $(OBJDIR)$Pdec16be$O $(OBJDIR)$Pdec16le$O $(OBJDIR)$Pdec32be$O $(OBJDIR)$Pdec32le$O $(OBJDIR)$Pdec64be$O $(OBJDIR)$Pdec64le$O $(OBJDIR)$Penc16be$O $(OBJDIR)$Penc16le$O $(OBJDIR)$Penc32be$O $(OBJDIR)$Penc32le$O $(OBJDIR)$Penc64be$O $(OBJDIR)$Penc64le$O $(OBJDIR)$Ppemdec$O $(OBJDIR)$Pec_all_m15$O $(OBJDIR)$Pec_all_m31$O $(OBJDIR)$Pec_c25519_i15$O $(OBJDIR)$Pec_c25519_i31$O $(OBJDIR)$Pec_c25519_m15$O $(OBJDIR)$Pec_c25519_m31$O $(OBJDIR)$Pec_curve25519$O $(OBJDIR)$Pec_default$O $(OBJDIR)$Pec_p256_m15$O $(OBJDIR)$Pec_p256_m31$O $(OBJDIR)$Pec_prime_i15$O $(OBJDIR)$Pec_prime_i31$O $(OBJDIR)$Pec_secp256r1$O $(OBJDIR)$Pec_secp384r1$O $(OBJDIR)$Pec_secp521r1$O $(OBJDIR)$Pecdsa_atr$O $(OBJDIR)$Pecdsa_default_sign_asn1$O $(OBJDIR)$Pecdsa_default_sign_raw$O $(OBJDIR)$Pecdsa_default_vrfy_asn1$O $(OBJDIR)$Pecdsa_default_vrfy_raw$O $(OBJDIR)$Pecdsa_i15_bits$O $(OBJDIR)$Pecdsa_i15_sign_asn1$O $(OBJDIR)$Pecdsa_i15_sign_raw$O $(OBJDIR)$Pecdsa_i15_vrfy_asn1$O $(OBJDIR)$Pecdsa_i15_vrfy_raw$O $(OBJDIR)$Pecdsa_i31_bits$O $(OBJDIR)$Pecdsa_i31_sign_asn1$O $(OBJDIR)$Pecdsa_i31_sign_raw$O $(OBJDIR)$Pecdsa_i31_vrfy_asn1$O $(OBJDIR)$Pecdsa_i31_vrfy_raw$O 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$(OBJDIR)$Prsa_i32_pkcs1_sign$O $(OBJDIR)$Prsa_i32_pkcs1_vrfy$O $(OBJDIR)$Prsa_i32_priv$O $(OBJDIR)$Prsa_i32_pub$O $(OBJDIR)$Prsa_pkcs1_sig_pad$O $(OBJDIR)$Prsa_pkcs1_sig_unpad$O $(OBJDIR)$Prsa_ssl_decrypt$O $(OBJDIR)$Pprf$O $(OBJDIR)$Pprf_md5sha1$O $(OBJDIR)$Pprf_sha256$O $(OBJDIR)$Pprf_sha384$O $(OBJDIR)$Pssl_ccert_single_ec$O $(OBJDIR)$Pssl_ccert_single_rsa$O $(OBJDIR)$Pssl_client$O $(OBJDIR)$Pssl_client_default_rsapub$O $(OBJDIR)$Pssl_client_full$O $(OBJDIR)$Pssl_engine$O $(OBJDIR)$Pssl_engine_default_aescbc$O $(OBJDIR)$Pssl_engine_default_aesgcm$O $(OBJDIR)$Pssl_engine_default_chapol$O $(OBJDIR)$Pssl_engine_default_descbc$O $(OBJDIR)$Pssl_engine_default_ec$O $(OBJDIR)$Pssl_engine_default_ecdsa$O $(OBJDIR)$Pssl_engine_default_rsavrfy$O $(OBJDIR)$Pssl_hashes$O $(OBJDIR)$Pssl_hs_client$O $(OBJDIR)$Pssl_hs_server$O $(OBJDIR)$Pssl_io$O $(OBJDIR)$Pssl_lru$O $(OBJDIR)$Pssl_rec_cbc$O $(OBJDIR)$Pssl_rec_chapol$O $(OBJDIR)$Pssl_rec_gcm$O $(OBJDIR)$Pssl_scert_single_ec$O $(OBJDIR)$Pssl_scert_single_rsa$O $(OBJDIR)$Pssl_server$O $(OBJDIR)$Pssl_server_full_ec$O $(OBJDIR)$Pssl_server_full_rsa$O $(OBJDIR)$Pssl_server_mine2c$O $(OBJDIR)$Pssl_server_mine2g$O $(OBJDIR)$Pssl_server_minf2c$O $(OBJDIR)$Pssl_server_minf2g$O $(OBJDIR)$Pssl_server_minr2g$O $(OBJDIR)$Pssl_server_minu2g$O $(OBJDIR)$Pssl_server_minv2g$O $(OBJDIR)$Paes_big_cbcdec$O $(OBJDIR)$Paes_big_cbcenc$O $(OBJDIR)$Paes_big_ctr$O $(OBJDIR)$Paes_big_dec$O $(OBJDIR)$Paes_big_enc$O $(OBJDIR)$Paes_common$O $(OBJDIR)$Paes_ct$O $(OBJDIR)$Paes_ct64$O $(OBJDIR)$Paes_ct64_cbcdec$O $(OBJDIR)$Paes_ct64_cbcenc$O $(OBJDIR)$Paes_ct64_ctr$O $(OBJDIR)$Paes_ct64_dec$O $(OBJDIR)$Paes_ct64_enc$O $(OBJDIR)$Paes_ct_cbcdec$O $(OBJDIR)$Paes_ct_cbcenc$O $(OBJDIR)$Paes_ct_ctr$O $(OBJDIR)$Paes_ct_dec$O $(OBJDIR)$Paes_ct_enc$O $(OBJDIR)$Paes_pwr8$O $(OBJDIR)$Paes_pwr8_cbcdec$O $(OBJDIR)$Paes_pwr8_cbcenc$O $(OBJDIR)$Paes_pwr8_ctr$O $(OBJDIR)$Paes_small_cbcdec$O $(OBJDIR)$Paes_small_cbcenc$O $(OBJDIR)$Paes_small_ctr$O $(OBJDIR)$Paes_small_dec$O $(OBJDIR)$Paes_small_enc$O $(OBJDIR)$Paes_x86ni$O $(OBJDIR)$Paes_x86ni_cbcdec$O $(OBJDIR)$Paes_x86ni_cbcenc$O $(OBJDIR)$Paes_x86ni_ctr$O $(OBJDIR)$Pchacha20_ct$O $(OBJDIR)$Pdes_ct$O $(OBJDIR)$Pdes_ct_cbcdec$O $(OBJDIR)$Pdes_ct_cbcenc$O $(OBJDIR)$Pdes_support$O $(OBJDIR)$Pdes_tab$O $(OBJDIR)$Pdes_tab_cbcdec$O $(OBJDIR)$Pdes_tab_cbcenc$O $(OBJDIR)$Ppoly1305_ctmul$O $(OBJDIR)$Ppoly1305_ctmul32$O $(OBJDIR)$Ppoly1305_ctmulq$O $(OBJDIR)$Ppoly1305_i15$O $(OBJDIR)$Pskey_decoder$O $(OBJDIR)$Px509_decoder$O $(OBJDIR)$Px509_knownkey$O $(OBJDIR)$Px509_minimal$O $(OBJDIR)$Px509_minimal_full$O OBJBRSSL = $(OBJDIR)$Pbrssl$O $(OBJDIR)$Pcerts$O $(OBJDIR)$Pchain$O $(OBJDIR)$Pclient$O $(OBJDIR)$Perrors$O $(OBJDIR)$Pfiles$O $(OBJDIR)$Pkeys$O $(OBJDIR)$Pnames$O $(OBJDIR)$Pserver$O $(OBJDIR)$Pskey$O $(OBJDIR)$Psslio$O $(OBJDIR)$Pta$O $(OBJDIR)$Pvector$O $(OBJDIR)$Pverify$O $(OBJDIR)$Pxmem$O OBJTESTCRYPTO = $(OBJDIR)$Ptest_crypto$O OBJTESTSPEED = $(OBJDIR)$Ptest_speed$O @@ -689,6 +689,9 @@ $(OBJDIR)$Ppoly1305_ctmul$O: src$Psymcipher$Ppoly1305_ctmul.c $(HEADERSPRIV) $(OBJDIR)$Ppoly1305_ctmul32$O: src$Psymcipher$Ppoly1305_ctmul32.c $(HEADERSPRIV) $(CC) $(CFLAGS) $(INCFLAGS) $(CCOUT)$(OBJDIR)$Ppoly1305_ctmul32$O src$Psymcipher$Ppoly1305_ctmul32.c +$(OBJDIR)$Ppoly1305_ctmulq$O: src$Psymcipher$Ppoly1305_ctmulq.c $(HEADERSPRIV) + $(CC) $(CFLAGS) $(INCFLAGS) $(CCOUT)$(OBJDIR)$Ppoly1305_ctmulq$O src$Psymcipher$Ppoly1305_ctmulq.c + $(OBJDIR)$Ppoly1305_i15$O: src$Psymcipher$Ppoly1305_i15.c $(HEADERSPRIV) $(CC) $(CFLAGS) $(INCFLAGS) $(CCOUT)$(OBJDIR)$Ppoly1305_i15$O src$Psymcipher$Ppoly1305_i15.c diff --git a/mk/mkrules.sh b/mk/mkrules.sh index 929d305..7097d4d 100755 --- a/mk/mkrules.sh +++ b/mk/mkrules.sh @@ -259,6 +259,7 @@ coresrc=" \ src/symcipher/des_tab_cbcenc.c \ src/symcipher/poly1305_ctmul.c \ src/symcipher/poly1305_ctmul32.c \ + src/symcipher/poly1305_ctmulq.c \ src/symcipher/poly1305_i15.c \ src/x509/skey_decoder.c \ src/x509/x509_decoder.c \ diff --git a/src/config.h b/src/config.h index d2e7a7d..71440e7 100644 --- a/src/config.h +++ b/src/config.h @@ -172,4 +172,21 @@ #define BR_POWER8 1 */ +/* + * When BR_INT128 is enabled, then code using the 'unsigned __int64' + * and 'unsigned __int128' types will be used to leverage 64x64->128 + * unsigned multiplications. This should work with GCC and compatible + * compilers on 64-bit architectures. + * +#define BR_INT128 1 + */ + +/* + * When BR_UMUL128 is enabled, then code using the '_umul128()' and + * '_addcarry_u64()' intrinsics will be used to implement 64x64->128 + * unsigned multiplications. This should work on Visual C on x64 systems. + * +#define BR_UMUL128 1 + */ + #endif diff --git a/src/inner.h b/src/inner.h index 47431c0..bcf61b0 100644 --- a/src/inner.h +++ b/src/inner.h @@ -209,6 +209,17 @@ #endif #endif +/* + * Detect support for 128-bit integers. + */ +#if !defined BR_INT128 && !defined BR_UMUL128 +#ifdef __SIZEOF_INT128__ +#define BR_INT128 1 +#elif _M_X64 +#define BR_UMUL128 1 +#endif +#endif + /* ==================================================================== */ /* * Encoding/decoding functions. diff --git a/src/ssl/ssl_engine_default_chapol.c b/src/ssl/ssl_engine_default_chapol.c index 5f089b1..630286a 100644 --- a/src/ssl/ssl_engine_default_chapol.c +++ b/src/ssl/ssl_engine_default_chapol.c @@ -28,10 +28,21 @@ void br_ssl_engine_set_default_chapol(br_ssl_engine_context *cc) { +#if BR_INT128 || BR_UMUL128 + br_poly1305_run bp; +#endif + br_ssl_engine_set_chapol(cc, &br_sslrec_in_chapol_vtable, &br_sslrec_out_chapol_vtable); br_ssl_engine_set_chacha20(cc, &br_chacha20_ct_run); +#if BR_INT128 || BR_UMUL128 + bp = br_poly1305_ctmulq_get(); + if (bp) { + br_ssl_engine_set_poly1305(cc, bp); + return; + } +#endif #if BR_LOMUL br_ssl_engine_set_poly1305(cc, &br_poly1305_ctmul32_run); #else diff --git a/src/symcipher/poly1305_ctmulq.c b/src/symcipher/poly1305_ctmulq.c new file mode 100644 index 0000000..b00683a --- /dev/null +++ b/src/symcipher/poly1305_ctmulq.c @@ -0,0 +1,475 @@ +/* + * Copyright (c) 2017 Thomas Pornin + * + * Permission is hereby granted, free of charge, to any person obtaining + * a copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sublicense, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include "inner.h" + +#if BR_INT128 || BR_UMUL128 + +#if BR_INT128 + +#define MUL128(hi, lo, x, y) do { \ + unsigned __int128 mul128tmp; \ + mul128tmp = (unsigned __int128)(x) * (unsigned __int128)(y); \ + (hi) = (uint64_t)(mul128tmp >> 64); \ + (lo) = (uint64_t)mul128tmp; \ + } while (0) + +#elif BR_UMUL128 + +#include + +#define MUL128(hi, lo, x, y) do { \ + (lo) = _umul128((x), (y), &(hi)); \ + } while (0) + +#endif + +#define MASK42 ((uint64_t)0x000003FFFFFFFFFF) +#define MASK44 ((uint64_t)0x00000FFFFFFFFFFF) + +/* + * The "accumulator" word is nominally a 130-bit value. We split it into + * words of 44 bits, each held in a 64-bit variable. + * + * If the current accumulator is a = a0 + a1*W + a2*W^2 (where W = 2^44) + * and r = r0 + r1*W + r2*W^2, then: + * + * a*r = (a0*r0) + * + (a0*r1 + a1*r0) * W + * + (a0*r2 + a1*r1 + a2*r0) * W^2 + * + (a1*r2 + a2*r1) * W^3 + * + (a2*r2) * W^4 + * + * We want to reduce that value modulo p = 2^130-5, so W^3 = 20 mod p, + * and W^4 = 20*W mod p. Thus, if we define u1 = 20*r1 and u2 = 20*r2, + * then the equations above become: + * + * b0 = a0*r0 + a1*u2 + a2*u1 + * b1 = a0*r1 + a1*r0 + a2*u2 + * b2 = a0*r2 + a1*r1 + a2*r0 + * + * In order to make u1 fit in 44 bits, we can change these equations + * into: + * + * b0 = a0*r0 + a1*u2 + a2*t1 + * b1 = a0*r1 + a1*r0 + a2*t2 + * b2 = a0*r2 + a1*r1 + a2*r0 + * + * Where t1 is u1 truncated to 44 bits, and t2 is u2 added to the extra + * bits of u1. Note that since r is clamped down to a 124-bit value, the + * values u2 and t2 fit on 44 bits too. + * + * The bx values are larger than 44 bits, so we may split them into a + * lower half (cx, 44 bits) and an upper half (dx). The new values for + * the accumulator are then: + * + * e0 = c0 + 20*d2 + * e1 = c1 + d0 + * e2 = c2 + d1 + * + * The equations allow for some room, i.e. the ax values may be larger + * than 44 bits. Similarly, the ex values will usually be larger than + * the ax. Thus, some sort of carry propagation must be done regularly, + * though not necessarily at each iteration. In particular, we do not + * need to compute the additions (for the bx values) over 128-bit + * quantities; we can stick to 64-bit computations. + * + * + * Since the 128-bit result of a 64x64 multiplication is actually + * represented over two 64-bit registers, it is cheaper to arrange for + * any split that happens between the "high" and "low" halves to be on + * that 64-bit boundary. This is done by left shifting the rx, ux and tx + * by 20 bits (since they all fit on 44 bits each, this shift is + * always possible). + */ + +static void +poly1305_inner_big(uint64_t *acc, uint64_t *r, const void *data, size_t len) +{ + +#define MX(hi, lo, m0, m1, m2) do { \ + uint64_t mxhi, mxlo; \ + MUL128(mxhi, mxlo, a0, m0); \ + (hi) = mxhi; \ + (lo) = mxlo >> 20; \ + MUL128(mxhi, mxlo, a1, m1); \ + (hi) += mxhi; \ + (lo) += mxlo >> 20; \ + MUL128(mxhi, mxlo, a2, m2); \ + (hi) += mxhi; \ + (lo) += mxlo >> 20; \ + } while (0) + + const unsigned char *buf; + uint64_t a0, a1, a2; + uint64_t r0, r1, r2, t1, t2, u2; + + r0 = r[0]; + r1 = r[1]; + r2 = r[2]; + t1 = r[3]; + t2 = r[4]; + u2 = r[5]; + a0 = acc[0]; + a1 = acc[1]; + a2 = acc[2]; + buf = data; + + while (len > 0) { + uint64_t v0, v1, v2; + uint64_t c0, c1, c2, d0, d1, d2; + + v0 = br_dec64le(buf + 0); + v1 = br_dec64le(buf + 8); + v2 = v1 >> 24; + v1 = ((v0 >> 44) | (v1 << 20)) & MASK44; + v0 &= MASK44; + a0 += v0; + a1 += v1; + a2 += v2 + ((uint64_t)1 << 40); + MX(d0, c0, r0, u2, t1); + MX(d1, c1, r1, r0, t2); + MX(d2, c2, r2, r1, r0); + a0 = c0 + 20 * d2; + a1 = c1 + d0; + a2 = c2 + d1; + + v0 = br_dec64le(buf + 16); + v1 = br_dec64le(buf + 24); + v2 = v1 >> 24; + v1 = ((v0 >> 44) | (v1 << 20)) & MASK44; + v0 &= MASK44; + a0 += v0; + a1 += v1; + a2 += v2 + ((uint64_t)1 << 40); + MX(d0, c0, r0, u2, t1); + MX(d1, c1, r1, r0, t2); + MX(d2, c2, r2, r1, r0); + a0 = c0 + 20 * d2; + a1 = c1 + d0; + a2 = c2 + d1; + + v0 = br_dec64le(buf + 32); + v1 = br_dec64le(buf + 40); + v2 = v1 >> 24; + v1 = ((v0 >> 44) | (v1 << 20)) & MASK44; + v0 &= MASK44; + a0 += v0; + a1 += v1; + a2 += v2 + ((uint64_t)1 << 40); + MX(d0, c0, r0, u2, t1); + MX(d1, c1, r1, r0, t2); + MX(d2, c2, r2, r1, r0); + a0 = c0 + 20 * d2; + a1 = c1 + d0; + a2 = c2 + d1; + + v0 = br_dec64le(buf + 48); + v1 = br_dec64le(buf + 56); + v2 = v1 >> 24; + v1 = ((v0 >> 44) | (v1 << 20)) & MASK44; + v0 &= MASK44; + a0 += v0; + a1 += v1; + a2 += v2 + ((uint64_t)1 << 40); + MX(d0, c0, r0, u2, t1); + MX(d1, c1, r1, r0, t2); + MX(d2, c2, r2, r1, r0); + a0 = c0 + 20 * d2; + a1 = c1 + d0; + a2 = c2 + d1; + + a1 += a0 >> 44; + a0 &= MASK44; + a2 += a1 >> 44; + a1 &= MASK44; + a0 += 20 * (a2 >> 44); + a2 &= MASK44; + + buf += 64; + len -= 64; + } + acc[0] = a0; + acc[1] = a1; + acc[2] = a2; + +#undef MX +} + +static void +poly1305_inner_small(uint64_t *acc, uint64_t *r, const void *data, size_t len) +{ + const unsigned char *buf; + uint64_t a0, a1, a2; + uint64_t r0, r1, r2, t1, t2, u2; + + r0 = r[0]; + r1 = r[1]; + r2 = r[2]; + t1 = r[3]; + t2 = r[4]; + u2 = r[5]; + a0 = acc[0]; + a1 = acc[1]; + a2 = acc[2]; + buf = data; + + while (len > 0) { + uint64_t v0, v1, v2; + uint64_t c0, c1, c2, d0, d1, d2; + unsigned char tmp[16]; + + if (len < 16) { + memcpy(tmp, buf, len); + memset(tmp + len, 0, (sizeof tmp) - len); + buf = tmp; + len = 16; + } + v0 = br_dec64le(buf + 0); + v1 = br_dec64le(buf + 8); + + v2 = v1 >> 24; + v1 = ((v0 >> 44) | (v1 << 20)) & MASK44; + v0 &= MASK44; + + a0 += v0; + a1 += v1; + a2 += v2 + ((uint64_t)1 << 40); + +#define MX(hi, lo, m0, m1, m2) do { \ + uint64_t mxhi, mxlo; \ + MUL128(mxhi, mxlo, a0, m0); \ + (hi) = mxhi; \ + (lo) = mxlo >> 20; \ + MUL128(mxhi, mxlo, a1, m1); \ + (hi) += mxhi; \ + (lo) += mxlo >> 20; \ + MUL128(mxhi, mxlo, a2, m2); \ + (hi) += mxhi; \ + (lo) += mxlo >> 20; \ + } while (0) + + MX(d0, c0, r0, u2, t1); + MX(d1, c1, r1, r0, t2); + MX(d2, c2, r2, r1, r0); + +#undef MX + + a0 = c0 + 20 * d2; + a1 = c1 + d0; + a2 = c2 + d1; + + a1 += a0 >> 44; + a0 &= MASK44; + a2 += a1 >> 44; + a1 &= MASK44; + a0 += 20 * (a2 >> 44); + a2 &= MASK44; + + buf += 16; + len -= 16; + } + acc[0] = a0; + acc[1] = a1; + acc[2] = a2; +} + +static inline void +poly1305_inner(uint64_t *acc, uint64_t *r, const void *data, size_t len) +{ + if (len >= 64) { + size_t len2; + + len2 = len & ~(size_t)63; + poly1305_inner_big(acc, r, data, len2); + data = (const unsigned char *)data + len2; + len -= len2; + } + if (len > 0) { + poly1305_inner_small(acc, r, data, len); + } +} + +/* see bearssl_block.h */ +void +br_poly1305_ctmulq_run(const void *key, const void *iv, + void *data, size_t len, const void *aad, size_t aad_len, + void *tag, br_chacha20_run ichacha, int encrypt) +{ + unsigned char pkey[32], foot[16]; + uint64_t r[6], acc[3], r0, r1; + uint32_t v0, v1, v2, v3, v4; + uint64_t w0, w1, w2, w3; + uint32_t ctl; + + /* + * Compute the MAC key. The 'r' value is the first 16 bytes of + * pkey[]. + */ + memset(pkey, 0, sizeof pkey); + ichacha(key, iv, 0, pkey, sizeof pkey); + + /* + * If encrypting, ChaCha20 must run first, followed by Poly1305. + * When decrypting, the operations are reversed. + */ + if (encrypt) { + ichacha(key, iv, 1, data, len); + } + + /* + * Run Poly1305. We must process the AAD, then ciphertext, then + * the footer (with the lengths). Note that the AAD and ciphertext + * are meant to be padded with zeros up to the next multiple of 16, + * and the length of the footer is 16 bytes as well. + */ + + /* + * Apply the "clamping" on r. + */ + pkey[ 3] &= 0x0F; + pkey[ 4] &= 0xFC; + pkey[ 7] &= 0x0F; + pkey[ 8] &= 0xFC; + pkey[11] &= 0x0F; + pkey[12] &= 0xFC; + pkey[15] &= 0x0F; + + /* + * Decode the 'r' value into 44-bit words, left-shifted by 20 bits. + * Also compute the u1 and u2 values. + */ + r0 = br_dec64le(pkey + 0); + r1 = br_dec64le(pkey + 8); + r[0] = r0 << 20; + r[1] = ((r0 >> 24) | (r1 << 40)) & ~(uint64_t)0xFFFFF; + r[2] = (r1 >> 4) & ~(uint64_t)0xFFFFF; + r1 = 20 * (r[1] >> 20); + r[3] = r1 << 20; + r[5] = 20 * r[2]; + r[4] = (r[5] + (r1 >> 24)) & ~(uint64_t)0xFFFFF; + + /* + * Accumulator is 0. + */ + acc[0] = 0; + acc[1] = 0; + acc[2] = 0; + + /* + * Process the additional authenticated data, ciphertext, and + * footer in due order. + */ + br_enc64le(foot, (uint64_t)aad_len); + br_enc64le(foot + 8, (uint64_t)len); + poly1305_inner(acc, r, aad, aad_len); + poly1305_inner(acc, r, data, len); + poly1305_inner_small(acc, r, foot, sizeof foot); + + /* + * Finalise modular reduction. At that point, the value consists + * in three 44-bit values (the lowest one might be slightly above + * 2^44). Two loops shall be sufficient. + */ + acc[1] += (acc[0] >> 44); + acc[0] &= MASK44; + acc[2] += (acc[1] >> 44); + acc[1] &= MASK44; + acc[0] += 5 * (acc[2] >> 42); + acc[2] &= MASK42; + acc[1] += (acc[0] >> 44); + acc[0] &= MASK44; + acc[2] += (acc[1] >> 44); + acc[1] &= MASK44; + acc[0] += 5 * (acc[2] >> 42); + acc[2] &= MASK42; + + /* + * The value may still fall in the 2^130-5..2^130-1 range, in + * which case we must reduce it again. The code below selects, + * in constant-time, between 'acc' and 'acc-p'. We encode the + * value over four 32-bit integers to finish the operation. + */ + v0 = (uint32_t)acc[0]; + v1 = (uint32_t)(acc[0] >> 32) | ((uint32_t)acc[1] << 12); + v2 = (uint32_t)(acc[1] >> 20) | ((uint32_t)acc[2] << 24); + v3 = (uint32_t)(acc[2] >> 8); + v4 = (uint32_t)(acc[2] >> 40); + + ctl = GT(v0, 0xFFFFFFFA); + ctl &= EQ(v1, 0xFFFFFFFF); + ctl &= EQ(v2, 0xFFFFFFFF); + ctl &= EQ(v3, 0xFFFFFFFF); + ctl &= EQ(v4, 0x00000003); + v0 = MUX(ctl, v0 + 5, v0); + v1 = MUX(ctl, 0, v1); + v2 = MUX(ctl, 0, v2); + v3 = MUX(ctl, 0, v3); + + /* + * Add the "s" value. This is done modulo 2^128. Don't forget + * carry propagation... + */ + w0 = (uint64_t)v0 + (uint64_t)br_dec32le(pkey + 16); + w1 = (uint64_t)v1 + (uint64_t)br_dec32le(pkey + 20) + (w0 >> 32); + w2 = (uint64_t)v2 + (uint64_t)br_dec32le(pkey + 24) + (w1 >> 32); + w3 = (uint64_t)v3 + (uint64_t)br_dec32le(pkey + 28) + (w2 >> 32); + v0 = (uint32_t)w0; + v1 = (uint32_t)w1; + v2 = (uint32_t)w2; + v3 = (uint32_t)w3; + + /* + * Encode the tag. + */ + br_enc32le((unsigned char *)tag + 0, v0); + br_enc32le((unsigned char *)tag + 4, v1); + br_enc32le((unsigned char *)tag + 8, v2); + br_enc32le((unsigned char *)tag + 12, v3); + + /* + * If decrypting, then ChaCha20 runs _after_ Poly1305. + */ + if (!encrypt) { + ichacha(key, iv, 1, data, len); + } +} + +/* see bearssl_block.h */ +br_poly1305_run +br_poly1305_ctmulq_get(void) +{ + return &br_poly1305_ctmulq_run; +} + +#else + +/* see bearssl_block.h */ +br_poly1305_run +br_poly1305_ctmulq_get(void) +{ + return 0; +} + +#endif diff --git a/test/test_crypto.c b/test/test_crypto.c index c05fca5..95edd24 100644 --- a/test/test_crypto.c +++ b/test/test_crypto.c @@ -4190,24 +4190,12 @@ test_Poly1305_inner(const char *name, br_poly1305_run ipoly, memcpy(data, plain, len); ipoly(key, nonce, data, len, aad, aad_len, tmp, br_chacha20_ct_run, 1); - if (memcmp(data, cipher, len) != 0) { - fprintf(stderr, "ChaCha20+Poly1305 KAT failed (1)\n"); - exit(EXIT_FAILURE); - } - if (memcmp(tmp, tag, 16) != 0) { - fprintf(stderr, "ChaCha20+Poly1305 KAT failed (2)\n"); - exit(EXIT_FAILURE); - } + check_equals("ChaCha20+Poly1305 KAT (1)", data, cipher, len); + check_equals("ChaCha20+Poly1305 KAT (2)", tmp, tag, 16); ipoly(key, nonce, data, len, aad, aad_len, tmp, br_chacha20_ct_run, 0); - if (memcmp(data, plain, len) != 0) { - fprintf(stderr, "ChaCha20+Poly1305 KAT failed (3)\n"); - exit(EXIT_FAILURE); - } - if (memcmp(tmp, tag, 16) != 0) { - fprintf(stderr, "ChaCha20+Poly1305 KAT failed (4)\n"); - exit(EXIT_FAILURE); - } + check_equals("ChaCha20+Poly1305 KAT (3)", data, plain, len); + check_equals("ChaCha20+Poly1305 KAT (4)", tmp, tag, 16); printf("."); fflush(stdout); @@ -4273,6 +4261,20 @@ test_Poly1305_i15(void) &br_poly1305_ctmul_run); } +static void +test_Poly1305_ctmulq(void) +{ + br_poly1305_run bp; + + bp = br_poly1305_ctmulq_get(); + if (bp == 0) { + printf("Test Poly1305_ctmulq: UNAVAILABLE\n"); + } else { + test_Poly1305_inner("Poly1305_ctmulq", bp, + &br_poly1305_ctmul_run); + } +} + /* * A 1024-bit RSA key, generated with OpenSSL. */ @@ -5670,6 +5672,7 @@ static const struct { STU(ChaCha20_ct), STU(Poly1305_ctmul), STU(Poly1305_ctmul32), + STU(Poly1305_ctmulq), STU(Poly1305_i15), STU(RSA_i15), STU(RSA_i31), diff --git a/test/test_speed.c b/test/test_speed.c index 6981299..17c869f 100644 --- a/test/test_speed.c +++ b/test/test_speed.c @@ -416,6 +416,19 @@ test_speed_poly1305_ctmul32(void) &br_poly1305_ctmul32_run); } +static void +test_speed_poly1305_ctmulq(void) +{ + br_poly1305_run bp; + + bp = br_poly1305_ctmulq_get(); + if (bp == 0) { + printf("%-30s UNAVAILABLE\n", "Poly1305 (ctmulq)"); + } else { + test_speed_poly1305_inner("Poly1305 (ctmulq)", bp); + } +} + static void test_speed_poly1305_i15(void) { @@ -1260,6 +1273,7 @@ static const struct { STU(poly1305_ctmul), STU(poly1305_ctmul32), + STU(poly1305_ctmulq), STU(poly1305_i15), STU(rsa_i15), diff --git a/tools/names.c b/tools/names.c index a8bb645..958e593 100644 --- a/tools/names.c +++ b/tools/names.c @@ -422,6 +422,8 @@ static const struct { (const void *(*)(void))&br_ghash_pclmul_get }, { "ghash_pwr8", "pwr8", (const void *(*)(void))&br_ghash_pwr8_get }, + { "poly1305_ctmulq", "ctmulq", + (const void *(*)(void))&br_poly1305_ctmulq_get }, { 0, 0, 0, } };