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https://github.com/jart/cosmopolitan.git
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957c61cbbf
This change upgrades to GCC 12.3 and GNU binutils 2.42. The GNU linker appears to have changed things so that only a single de-duplicated str table is present in the binary, and it gets placed wherever the linker wants, regardless of what the linker script says. To cope with that we need to stop using .ident to embed licenses. As such, this change does significant work to revamp how third party licenses are defined in the codebase, using `.section .notice,"aR",@progbits`. This new GCC 12.3 toolchain has support for GNU indirect functions. It lets us support __target_clones__ for the first time. This is used for optimizing the performance of libc string functions such as strlen and friends so far on x86, by ensuring AVX systems favor a second codepath that uses VEX encoding. It shaves some latency off certain operations. It's a useful feature to have for scientific computing for the reasons explained by the test/libcxx/openmp_test.cc example which compiles for fifteen different microarchitectures. Thanks to the upgrades, it's now also possible to use newer instruction sets, such as AVX512FP16, VNNI. Cosmo now uses the %gs register on x86 by default for TLS. Doing it is helpful for any program that links `cosmo_dlopen()`. Such programs had to recompile their binaries at startup to change the TLS instructions. That's not great, since it means every page in the executable needs to be faulted. The work of rewriting TLS-related x86 opcodes, is moved to fixupobj.com instead. This is great news for MacOS x86 users, since we previously needed to morph the binary every time for that platform but now that's no longer necessary. The only platforms where we need fixup of TLS x86 opcodes at runtime are now Windows, OpenBSD, and NetBSD. On Windows we morph TLS to point deeper into the TIB, based on a TlsAlloc assignment, and on OpenBSD/NetBSD we morph %gs back into %fs since the kernels do not allow us to specify a value for the %gs register. OpenBSD users are now required to use APE Loader to run Cosmo binaries and assimilation is no longer possible. OpenBSD kernel needs to change to allow programs to specify a value for the %gs register, or it needs to stop marking executable pages loaded by the kernel as mimmutable(). This release fixes __constructor__, .ctor, .init_array, and lastly the .preinit_array so they behave the exact same way as glibc. We no longer use hex constants to define math.h symbols like M_PI.
561 lines
18 KiB
C
561 lines
18 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:4;tab-width:4;coding:utf-8 -*-│
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│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright The Mbed TLS Contributors │
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│ │
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│ Licensed under the Apache License, Version 2.0 (the "License"); │
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│ you may not use this file except in compliance with the License. │
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│ You may obtain a copy of the License at │
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│ │
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│ http://www.apache.org/licenses/LICENSE-2.0 │
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│ │
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│ Unless required by applicable law or agreed to in writing, software │
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│ distributed under the License is distributed on an "AS IS" BASIS, │
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│ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. │
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│ See the License for the specific language governing permissions and │
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│ limitations under the License. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "third_party/mbedtls/poly1305.h"
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#include "libc/serialize.h"
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#include "libc/str/str.h"
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#include "third_party/mbedtls/common.h"
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#include "third_party/mbedtls/error.h"
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#include "third_party/mbedtls/platform.h"
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__static_yoink("mbedtls_notice");
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/**
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* \file poly1305.c
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*
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* \brief Poly1305 authentication algorithm.
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*
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* Copyright The Mbed TLS Contributors
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#if defined(MBEDTLS_POLY1305_C)
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#if !defined(MBEDTLS_POLY1305_ALT)
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#if ( defined(__ARMCC_VERSION) || defined(_MSC_VER) ) && \
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!defined(inline) && !defined(__cplusplus)
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#define inline __inline
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#endif
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/* Parameter validation macros */
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#define POLY1305_VALIDATE_RET( cond ) \
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MBEDTLS_INTERNAL_VALIDATE_RET( cond, MBEDTLS_ERR_POLY1305_BAD_INPUT_DATA )
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#define POLY1305_VALIDATE( cond ) \
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MBEDTLS_INTERNAL_VALIDATE( cond )
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#define POLY1305_BLOCK_SIZE_BYTES ( 16U )
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#define BYTES_TO_U32_LE( data, offset ) READ32LE((data) + (offset))
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/*
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* Our implementation is tuned for 32-bit platforms with a 64-bit multiplier.
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* However we provided an alternative for platforms without such a multiplier.
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*/
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#if defined(MBEDTLS_NO_64BIT_MULTIPLICATION)
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static uint64_t mul64( uint32_t a, uint32_t b )
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{
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/* a = al + 2**16 ah, b = bl + 2**16 bh */
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const uint16_t al = (uint16_t) a;
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const uint16_t bl = (uint16_t) b;
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const uint16_t ah = a >> 16;
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const uint16_t bh = b >> 16;
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/* ab = al*bl + 2**16 (ah*bl + bl*bh) + 2**32 ah*bh */
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const uint32_t lo = (uint32_t) al * bl;
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const uint64_t me = (uint64_t)( (uint32_t) ah * bl ) + (uint32_t) al * bh;
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const uint32_t hi = (uint32_t) ah * bh;
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return( lo + ( me << 16 ) + ( (uint64_t) hi << 32 ) );
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}
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#else
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static inline uint64_t mul64( uint32_t a, uint32_t b )
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{
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return( (uint64_t) a * b );
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}
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#endif
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/**
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* \brief Process blocks with Poly1305.
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*
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* \param ctx The Poly1305 context.
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* \param nblocks Number of blocks to process. Note that this
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* function only processes full blocks.
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* \param input Buffer containing the input block(s).
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* \param needs_padding Set to 0 if the padding bit has already been
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* applied to the input data before calling this
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* function. Otherwise, set this parameter to 1.
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*/
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static void poly1305_process( mbedtls_poly1305_context *ctx,
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size_t nblocks,
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const unsigned char *input,
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uint32_t needs_padding )
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{
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uint64_t d0, d1, d2, d3;
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uint32_t acc0, acc1, acc2, acc3, acc4;
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uint32_t r0, r1, r2, r3;
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uint32_t rs1, rs2, rs3;
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size_t offset = 0U;
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size_t i;
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r0 = ctx->r[0];
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r1 = ctx->r[1];
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r2 = ctx->r[2];
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r3 = ctx->r[3];
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rs1 = r1 + ( r1 >> 2U );
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rs2 = r2 + ( r2 >> 2U );
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rs3 = r3 + ( r3 >> 2U );
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acc0 = ctx->acc[0];
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acc1 = ctx->acc[1];
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acc2 = ctx->acc[2];
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acc3 = ctx->acc[3];
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acc4 = ctx->acc[4];
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/* Process full blocks */
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for( i = 0U; i < nblocks; i++ )
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{
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/* The input block is treated as a 128-bit little-endian integer */
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d0 = BYTES_TO_U32_LE( input, offset + 0 );
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d1 = BYTES_TO_U32_LE( input, offset + 4 );
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d2 = BYTES_TO_U32_LE( input, offset + 8 );
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d3 = BYTES_TO_U32_LE( input, offset + 12 );
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/* Compute: acc += (padded) block as a 130-bit integer */
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d0 += (uint64_t) acc0;
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d1 += (uint64_t) acc1 + ( d0 >> 32U );
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d2 += (uint64_t) acc2 + ( d1 >> 32U );
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d3 += (uint64_t) acc3 + ( d2 >> 32U );
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acc0 = (uint32_t) d0;
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acc1 = (uint32_t) d1;
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acc2 = (uint32_t) d2;
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acc3 = (uint32_t) d3;
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acc4 += (uint32_t) ( d3 >> 32U ) + needs_padding;
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/* Compute: acc *= r */
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d0 = mul64( acc0, r0 ) +
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mul64( acc1, rs3 ) +
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mul64( acc2, rs2 ) +
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mul64( acc3, rs1 );
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d1 = mul64( acc0, r1 ) +
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mul64( acc1, r0 ) +
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mul64( acc2, rs3 ) +
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mul64( acc3, rs2 ) +
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mul64( acc4, rs1 );
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d2 = mul64( acc0, r2 ) +
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mul64( acc1, r1 ) +
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mul64( acc2, r0 ) +
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mul64( acc3, rs3 ) +
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mul64( acc4, rs2 );
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d3 = mul64( acc0, r3 ) +
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mul64( acc1, r2 ) +
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mul64( acc2, r1 ) +
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mul64( acc3, r0 ) +
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mul64( acc4, rs3 );
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acc4 *= r0;
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/* Compute: acc %= (2^130 - 5) (partial remainder) */
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d1 += ( d0 >> 32 );
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d2 += ( d1 >> 32 );
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d3 += ( d2 >> 32 );
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acc0 = (uint32_t) d0;
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acc1 = (uint32_t) d1;
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acc2 = (uint32_t) d2;
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acc3 = (uint32_t) d3;
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acc4 = (uint32_t) ( d3 >> 32 ) + acc4;
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d0 = (uint64_t) acc0 + ( acc4 >> 2 ) + ( acc4 & 0xFFFFFFFCU );
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acc4 &= 3U;
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acc0 = (uint32_t) d0;
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d0 = (uint64_t) acc1 + ( d0 >> 32U );
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acc1 = (uint32_t) d0;
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d0 = (uint64_t) acc2 + ( d0 >> 32U );
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acc2 = (uint32_t) d0;
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d0 = (uint64_t) acc3 + ( d0 >> 32U );
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acc3 = (uint32_t) d0;
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d0 = (uint64_t) acc4 + ( d0 >> 32U );
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acc4 = (uint32_t) d0;
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offset += POLY1305_BLOCK_SIZE_BYTES;
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}
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ctx->acc[0] = acc0;
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ctx->acc[1] = acc1;
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ctx->acc[2] = acc2;
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ctx->acc[3] = acc3;
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ctx->acc[4] = acc4;
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}
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/**
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* \brief Compute the Poly1305 MAC
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*
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* \param ctx The Poly1305 context.
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* \param mac The buffer to where the MAC is written. Must be
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* big enough to contain the 16-byte MAC.
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*/
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static void poly1305_compute_mac( const mbedtls_poly1305_context *ctx,
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unsigned char mac[16] )
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{
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uint64_t d;
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uint32_t g0, g1, g2, g3, g4;
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uint32_t acc0, acc1, acc2, acc3, acc4;
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uint32_t mask;
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uint32_t mask_inv;
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acc0 = ctx->acc[0];
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acc1 = ctx->acc[1];
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acc2 = ctx->acc[2];
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acc3 = ctx->acc[3];
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acc4 = ctx->acc[4];
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/* Before adding 's' we ensure that the accumulator is mod 2^130 - 5.
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* We do this by calculating acc - (2^130 - 5), then checking if
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* the 131st bit is set. If it is, then reduce: acc -= (2^130 - 5)
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*/
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/* Calculate acc + -(2^130 - 5) */
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d = ( (uint64_t) acc0 + 5U );
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g0 = (uint32_t) d;
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d = ( (uint64_t) acc1 + ( d >> 32 ) );
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g1 = (uint32_t) d;
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d = ( (uint64_t) acc2 + ( d >> 32 ) );
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g2 = (uint32_t) d;
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d = ( (uint64_t) acc3 + ( d >> 32 ) );
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g3 = (uint32_t) d;
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g4 = acc4 + (uint32_t) ( d >> 32U );
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/* mask == 0xFFFFFFFF if 131st bit is set, otherwise mask == 0 */
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mask = (uint32_t) 0U - ( g4 >> 2U );
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mask_inv = ~mask;
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/* If 131st bit is set then acc=g, otherwise, acc is unmodified */
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acc0 = ( acc0 & mask_inv ) | ( g0 & mask );
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acc1 = ( acc1 & mask_inv ) | ( g1 & mask );
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acc2 = ( acc2 & mask_inv ) | ( g2 & mask );
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acc3 = ( acc3 & mask_inv ) | ( g3 & mask );
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/* Add 's' */
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d = (uint64_t) acc0 + ctx->s[0];
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acc0 = (uint32_t) d;
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d = (uint64_t) acc1 + ctx->s[1] + ( d >> 32U );
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acc1 = (uint32_t) d;
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d = (uint64_t) acc2 + ctx->s[2] + ( d >> 32U );
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acc2 = (uint32_t) d;
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acc3 += ctx->s[3] + (uint32_t) ( d >> 32U );
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/* Compute MAC (128 least significant bits of the accumulator) */
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mac[ 0] = (unsigned char)( acc0 );
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mac[ 1] = (unsigned char)( acc0 >> 8 );
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mac[ 2] = (unsigned char)( acc0 >> 16 );
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mac[ 3] = (unsigned char)( acc0 >> 24 );
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mac[ 4] = (unsigned char)( acc1 );
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mac[ 5] = (unsigned char)( acc1 >> 8 );
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mac[ 6] = (unsigned char)( acc1 >> 16 );
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mac[ 7] = (unsigned char)( acc1 >> 24 );
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mac[ 8] = (unsigned char)( acc2 );
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mac[ 9] = (unsigned char)( acc2 >> 8 );
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mac[10] = (unsigned char)( acc2 >> 16 );
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mac[11] = (unsigned char)( acc2 >> 24 );
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mac[12] = (unsigned char)( acc3 );
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mac[13] = (unsigned char)( acc3 >> 8 );
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mac[14] = (unsigned char)( acc3 >> 16 );
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mac[15] = (unsigned char)( acc3 >> 24 );
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}
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void mbedtls_poly1305_init( mbedtls_poly1305_context *ctx )
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{
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POLY1305_VALIDATE( ctx != NULL );
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mbedtls_platform_zeroize( ctx, sizeof( mbedtls_poly1305_context ) );
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}
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void mbedtls_poly1305_free( mbedtls_poly1305_context *ctx )
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{
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if( ctx == NULL )
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return;
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mbedtls_platform_zeroize( ctx, sizeof( mbedtls_poly1305_context ) );
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}
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int mbedtls_poly1305_starts( mbedtls_poly1305_context *ctx,
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const unsigned char key[32] )
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{
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POLY1305_VALIDATE_RET( ctx != NULL );
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POLY1305_VALIDATE_RET( key != NULL );
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/* r &= 0x0ffffffc0ffffffc0ffffffc0fffffff */
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ctx->r[0] = BYTES_TO_U32_LE( key, 0 ) & 0x0FFFFFFFU;
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ctx->r[1] = BYTES_TO_U32_LE( key, 4 ) & 0x0FFFFFFCU;
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ctx->r[2] = BYTES_TO_U32_LE( key, 8 ) & 0x0FFFFFFCU;
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ctx->r[3] = BYTES_TO_U32_LE( key, 12 ) & 0x0FFFFFFCU;
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ctx->s[0] = BYTES_TO_U32_LE( key, 16 );
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ctx->s[1] = BYTES_TO_U32_LE( key, 20 );
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ctx->s[2] = BYTES_TO_U32_LE( key, 24 );
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ctx->s[3] = BYTES_TO_U32_LE( key, 28 );
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/* Initial accumulator state */
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ctx->acc[0] = 0U;
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ctx->acc[1] = 0U;
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ctx->acc[2] = 0U;
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ctx->acc[3] = 0U;
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ctx->acc[4] = 0U;
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/* Queue initially empty */
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mbedtls_platform_zeroize( ctx->queue, sizeof( ctx->queue ) );
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ctx->queue_len = 0U;
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return( 0 );
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}
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int mbedtls_poly1305_update( mbedtls_poly1305_context *ctx,
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const unsigned char *input,
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size_t ilen )
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{
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size_t offset = 0U;
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size_t remaining = ilen;
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size_t queue_free_len;
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size_t nblocks;
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POLY1305_VALIDATE_RET( ctx != NULL );
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POLY1305_VALIDATE_RET( ilen == 0 || input != NULL );
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if( ( remaining > 0U ) && ( ctx->queue_len > 0U ) )
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{
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queue_free_len = ( POLY1305_BLOCK_SIZE_BYTES - ctx->queue_len );
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if( ilen < queue_free_len )
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{
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/* Not enough data to complete the block.
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* Store this data with the other leftovers.
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*/
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memcpy( &ctx->queue[ctx->queue_len],
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input,
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ilen );
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ctx->queue_len += ilen;
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remaining = 0U;
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}
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else
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{
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/* Enough data to produce a complete block */
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memcpy( &ctx->queue[ctx->queue_len],
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input,
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queue_free_len );
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ctx->queue_len = 0U;
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poly1305_process( ctx, 1U, ctx->queue, 1U ); /* add padding bit */
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offset += queue_free_len;
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remaining -= queue_free_len;
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}
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}
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if( remaining >= POLY1305_BLOCK_SIZE_BYTES )
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{
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nblocks = remaining / POLY1305_BLOCK_SIZE_BYTES;
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poly1305_process( ctx, nblocks, &input[offset], 1U );
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offset += nblocks * POLY1305_BLOCK_SIZE_BYTES;
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remaining %= POLY1305_BLOCK_SIZE_BYTES;
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}
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if( remaining > 0U )
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{
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/* Store partial block */
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ctx->queue_len = remaining;
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memcpy( ctx->queue, &input[offset], remaining );
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}
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return( 0 );
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}
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int mbedtls_poly1305_finish( mbedtls_poly1305_context *ctx,
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unsigned char mac[16] )
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{
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POLY1305_VALIDATE_RET( ctx != NULL );
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POLY1305_VALIDATE_RET( mac != NULL );
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/* Process any leftover data */
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if( ctx->queue_len > 0U )
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{
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/* Add padding bit */
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ctx->queue[ctx->queue_len] = 1U;
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ctx->queue_len++;
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/* Pad with zeroes */
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memset( &ctx->queue[ctx->queue_len],
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0,
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POLY1305_BLOCK_SIZE_BYTES - ctx->queue_len );
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poly1305_process( ctx, 1U, /* Process 1 block */
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ctx->queue, 0U ); /* Already padded above */
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}
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poly1305_compute_mac( ctx, mac );
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return( 0 );
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}
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int mbedtls_poly1305_mac( const unsigned char key[32],
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const unsigned char *input,
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size_t ilen,
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unsigned char mac[16] )
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{
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mbedtls_poly1305_context ctx;
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int ret = MBEDTLS_ERR_THIS_CORRUPTION;
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POLY1305_VALIDATE_RET( key != NULL );
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POLY1305_VALIDATE_RET( mac != NULL );
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POLY1305_VALIDATE_RET( ilen == 0 || input != NULL );
|
|
|
|
mbedtls_poly1305_init( &ctx );
|
|
|
|
ret = mbedtls_poly1305_starts( &ctx, key );
|
|
if( ret != 0 )
|
|
goto cleanup;
|
|
|
|
ret = mbedtls_poly1305_update( &ctx, input, ilen );
|
|
if( ret != 0 )
|
|
goto cleanup;
|
|
|
|
ret = mbedtls_poly1305_finish( &ctx, mac );
|
|
|
|
cleanup:
|
|
mbedtls_poly1305_free( &ctx );
|
|
return( ret );
|
|
}
|
|
|
|
#endif /* MBEDTLS_POLY1305_ALT */
|
|
|
|
#if defined(MBEDTLS_SELF_TEST)
|
|
|
|
static const unsigned char test_keys[2][32] =
|
|
{
|
|
{
|
|
0x85, 0xd6, 0xbe, 0x78, 0x57, 0x55, 0x6d, 0x33,
|
|
0x7f, 0x44, 0x52, 0xfe, 0x42, 0xd5, 0x06, 0xa8,
|
|
0x01, 0x03, 0x80, 0x8a, 0xfb, 0x0d, 0xb2, 0xfd,
|
|
0x4a, 0xbf, 0xf6, 0xaf, 0x41, 0x49, 0xf5, 0x1b
|
|
},
|
|
{
|
|
0x1c, 0x92, 0x40, 0xa5, 0xeb, 0x55, 0xd3, 0x8a,
|
|
0xf3, 0x33, 0x88, 0x86, 0x04, 0xf6, 0xb5, 0xf0,
|
|
0x47, 0x39, 0x17, 0xc1, 0x40, 0x2b, 0x80, 0x09,
|
|
0x9d, 0xca, 0x5c, 0xbc, 0x20, 0x70, 0x75, 0xc0
|
|
}
|
|
};
|
|
|
|
static const unsigned char test_data[2][127] =
|
|
{
|
|
{
|
|
0x43, 0x72, 0x79, 0x70, 0x74, 0x6f, 0x67, 0x72,
|
|
0x61, 0x70, 0x68, 0x69, 0x63, 0x20, 0x46, 0x6f,
|
|
0x72, 0x75, 0x6d, 0x20, 0x52, 0x65, 0x73, 0x65,
|
|
0x61, 0x72, 0x63, 0x68, 0x20, 0x47, 0x72, 0x6f,
|
|
0x75, 0x70
|
|
},
|
|
{
|
|
0x27, 0x54, 0x77, 0x61, 0x73, 0x20, 0x62, 0x72,
|
|
0x69, 0x6c, 0x6c, 0x69, 0x67, 0x2c, 0x20, 0x61,
|
|
0x6e, 0x64, 0x20, 0x74, 0x68, 0x65, 0x20, 0x73,
|
|
0x6c, 0x69, 0x74, 0x68, 0x79, 0x20, 0x74, 0x6f,
|
|
0x76, 0x65, 0x73, 0x0a, 0x44, 0x69, 0x64, 0x20,
|
|
0x67, 0x79, 0x72, 0x65, 0x20, 0x61, 0x6e, 0x64,
|
|
0x20, 0x67, 0x69, 0x6d, 0x62, 0x6c, 0x65, 0x20,
|
|
0x69, 0x6e, 0x20, 0x74, 0x68, 0x65, 0x20, 0x77,
|
|
0x61, 0x62, 0x65, 0x3a, 0x0a, 0x41, 0x6c, 0x6c,
|
|
0x20, 0x6d, 0x69, 0x6d, 0x73, 0x79, 0x20, 0x77,
|
|
0x65, 0x72, 0x65, 0x20, 0x74, 0x68, 0x65, 0x20,
|
|
0x62, 0x6f, 0x72, 0x6f, 0x67, 0x6f, 0x76, 0x65,
|
|
0x73, 0x2c, 0x0a, 0x41, 0x6e, 0x64, 0x20, 0x74,
|
|
0x68, 0x65, 0x20, 0x6d, 0x6f, 0x6d, 0x65, 0x20,
|
|
0x72, 0x61, 0x74, 0x68, 0x73, 0x20, 0x6f, 0x75,
|
|
0x74, 0x67, 0x72, 0x61, 0x62, 0x65, 0x2e
|
|
}
|
|
};
|
|
|
|
static const size_t test_data_len[2] =
|
|
{
|
|
34U,
|
|
127U
|
|
};
|
|
|
|
static const unsigned char test_mac[2][16] =
|
|
{
|
|
{
|
|
0xa8, 0x06, 0x1d, 0xc1, 0x30, 0x51, 0x36, 0xc6,
|
|
0xc2, 0x2b, 0x8b, 0xaf, 0x0c, 0x01, 0x27, 0xa9
|
|
},
|
|
{
|
|
0x45, 0x41, 0x66, 0x9a, 0x7e, 0xaa, 0xee, 0x61,
|
|
0xe7, 0x08, 0xdc, 0x7c, 0xbc, 0xc5, 0xeb, 0x62
|
|
}
|
|
};
|
|
|
|
/* Make sure no other definition is already present. */
|
|
#undef ASSERT
|
|
|
|
#define ASSERT( cond, args ) \
|
|
do \
|
|
{ \
|
|
if( ! ( cond ) ) \
|
|
{ \
|
|
if( verbose != 0 ) \
|
|
mbedtls_printf args; \
|
|
\
|
|
return( -1 ); \
|
|
} \
|
|
} \
|
|
while( 0 )
|
|
|
|
int mbedtls_poly1305_self_test( int verbose )
|
|
{
|
|
unsigned char mac[16];
|
|
unsigned i;
|
|
int ret = MBEDTLS_ERR_THIS_CORRUPTION;
|
|
|
|
for( i = 0U; i < 2U; i++ )
|
|
{
|
|
if( verbose != 0 )
|
|
mbedtls_printf( " Poly1305 test %u ", i );
|
|
|
|
ret = mbedtls_poly1305_mac( test_keys[i],
|
|
test_data[i],
|
|
test_data_len[i],
|
|
mac );
|
|
ASSERT( 0 == ret, ( "error code: %i\n", ret ) );
|
|
|
|
ASSERT( 0 == timingsafe_bcmp( mac, test_mac[i], 16U ), ( "failed (mac)\n" ) );
|
|
|
|
if( verbose != 0 )
|
|
mbedtls_printf( "passed\n" );
|
|
}
|
|
|
|
if( verbose != 0 )
|
|
mbedtls_printf( "\n" );
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
#endif /* MBEDTLS_SELF_TEST */
|
|
|
|
#endif /* MBEDTLS_POLY1305_C */
|