62 lines
2.3 KiB
Plaintext
62 lines
2.3 KiB
Plaintext
hardeningFlags=(fortify stackprotector pic strictoverflow format relro bindnow)
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hardeningFlags+=("${hardeningEnable[@]}")
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hardeningCFlags=()
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hardeningLDFlags=()
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hardeningDisable=${hardeningDisable:-""}
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if [[ "$($LD -z 2>&1)" =~ "unknown option" ]]; then
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hardeningDisable+=" bindnow relro"
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fi
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if [[ -n "$NIX_DEBUG" ]]; then echo HARDENING: Value of '$hardeningDisable': $hardeningDisable >&2; fi
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if [[ ! $hardeningDisable == "all" ]]; then
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if [[ -n "$NIX_DEBUG" ]]; then echo 'HARDENING: Is active (not completely disabled with "all" flag)' >&2; fi
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for flag in "${hardeningFlags[@]}"
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do
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if [[ ! "${hardeningDisable}" =~ "$flag" ]]; then
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case $flag in
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fortify)
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if [[ -n "$NIX_DEBUG" ]]; then echo HARDENING: enabling fortify >&2; fi
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hardeningCFlags+=('-O2' '-D_FORTIFY_SOURCE=2')
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;;
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stackprotector)
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if [[ -n "$NIX_DEBUG" ]]; then echo HARDENING: enabling stackprotector >&2; fi
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hardeningCFlags+=('-fstack-protector-strong' '--param ssp-buffer-size=4')
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;;
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pie)
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if [[ -n "$NIX_DEBUG" ]]; then echo HARDENING: enabling CFlags -fPIE >&2; fi
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hardeningCFlags+=('-fPIE')
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if [[ ! ("$*" =~ " -shared " || "$*" =~ " -static ") ]]; then
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if [[ -n "$NIX_DEBUG" ]]; then echo HARDENING: enabling LDFlags -pie >&2; fi
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hardeningLDFlags+=('-pie')
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fi
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;;
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pic)
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if [[ -n "$NIX_DEBUG" ]]; then echo HARDENING: enabling pic >&2; fi
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hardeningCFlags+=('-fPIC')
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;;
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strictoverflow)
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if [[ -n "$NIX_DEBUG" ]]; then echo HARDENING: enabling strictoverflow >&2; fi
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hardeningCFlags+=('-fno-strict-overflow')
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;;
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format)
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if [[ -n "$NIX_DEBUG" ]]; then echo HARDENING: enabling format >&2; fi
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hardeningCFlags+=('-Wformat' '-Wformat-security' '-Werror=format-security')
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;;
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relro)
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if [[ -n "$NIX_DEBUG" ]]; then echo HARDENING: enabling relro >&2; fi
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hardeningLDFlags+=('-z relro')
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;;
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bindnow)
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if [[ -n "$NIX_DEBUG" ]]; then echo HARDENING: enabling bindnow >&2; fi
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hardeningLDFlags+=('-z now')
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;;
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*)
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echo "Hardening flag unknown: $flag" >&2
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;;
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esac
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fi
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done
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fi
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