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crypto/internal/boring: disable LFS64 interfaces
Comment out the definition in the libcrypto I/O code which enables the LFS64 interfaces. We don't use any of the I/O bits and pieces, and it's outside of the FIPS module, and it fixes some breakage in certain scenarios. Change-Id: Ie6597813726f94e23780b77d907cc1b9ccef36f0 Reviewed-on: https://go-review.googlesource.com/c/go/+/609976 LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Russ Cox <rsc@golang.org>
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@ -30,6 +30,15 @@ export CGO_ENABLED=0
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# Go toolchain / clang toolchain combinations.
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perl -p -i -e 's/defined.*ELF.*defined.*GNUC.*/$0 \&\& !defined(GOBORING)/' boringssl/crypto/mem.c
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# We build all of libcrypto, which includes a bunch of I/O operations that we
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# don't actually care about, since we only really want the BoringCrypto module.
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# In libcrypto, they use the LFS64 interfaces where available in order to
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# traverse files larger than 2GB. In some scenarios this can cause breakage, so
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# we comment out the _FILE_OFFSET_BITS definition which enables the LFS64
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# interfaces. Since this code is outside of the FIPS module, it doesn't affect
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# the certification status of the module. See b/364606941 for additional context.
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perl -p -i -e 's/(#define _FILE_OFFSET_BITS 64)/\/\/ $1/' boringssl/crypto/bio/file.c
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# Verbatim instructions from BoringCrypto build docs.
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printf "set(CMAKE_C_COMPILER \"clang\")\nset(CMAKE_CXX_COMPILER \"clang++\")\n" >${HOME}/toolchain
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cd boringssl
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