build docs, helper scripts

docs/build.md

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+# Building a go binary that includes golang-fips patches
+
+## Env variables
+
+`GOEXPERIMENT=strictfipsruntime` helps ensure a fips compliant binary is built. Note that this is functionally equivalent of
+
+```
+GO_BUILDTAGS+="goexperiment.strictfipsruntime"
+```
+
+## Native build - Method 1
+
+The easiest way to do is to simply clone this repo, apply patches and from the internal go/src directory run ./make.bash. See a more comprehensive script at `scripts/build1.sh`
+
+```
+git clone https://github.com/golang-fips/go.git golang-fips
+cd golang-fips
+./scripts/full-initialize-repo.sh go$GOLANG_VER
+cd go/src
+./make.bash --no-clean
+```
+
+## Native build - Method 2
+
+Another way is to directly apply fips patches on downloaded go and golang-fips binaries. See full script at `scripts/build2.sh`
+
+```
+wget https://github.com/golang/go/archive/refs/tags/go1.22.2.tar.gz
+wget https://github.com/golang-fips/go/archive/refs/tags/go1.22.2-1-openssl-fips.tar.gz
+tar -xf go1.22.2.tar.gz
+tar -xf go1.22.2-1-openssl-fips.tar.gz
+cd go-go1.22.2
+for patch in ../go-go1.22.2-1-openssl-fips/patches/*.patch; do
+    patch -p1 < "${patch}"
+done
+cd src
+./make.bash --no-clean
+```
+
+## Container Build
+
+So far the two methods above described steps to build golang natively. To build golang inside a container, copy the sample Dockerfile located at scripts/Dockerfile.sample to a new directory, modify it to add distro specific variables and run docker/podman on it.
+
+```
+mkdir build-context
+cp scripts/Dockerfile.sample scripts/Dockerfile
+# modify it to make it distro specific
+podman/docker build .
+```

docs/deps.md

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+# Dependencies

docs/openssl.md

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+# OpenSSL considerations

docs/overview.md

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+# Overview here

docs/test-conf.md

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+# Test configuration

scripts/Dockerfile.sample

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+FROM <distro-specific-base-image>
+
+ARG GOLANG_VER=1.21.9
+# turn on FIPS and CGO_ENABLED by default
+ARG FIPS=1
+ARG GODEBUG=0
+ARG CGO_ENABLED=1
+
+# certain env need proxy to download from github
+ENV http_proxy=""
+ENV https_proxy=""
+ENV no_proxy=""
+
+ENV GOLANG_FIPS=$FIPS
+ENV GODEBUG=$GODEBUG
+ENV CGO_ENABLED=1
+
+# distro specific package manager
+# need bootstrap golang to build go, will be removed later
+RUN dnf/apt install -y git wget golang && \
+    dnf/apt groupinstall -y "Development Tools"
+
+RUN go version
+RUN echo "GOROOT_BOOTSTRAP = / by default so will use installed go as compiler"
+RUN git config --global user.email "<add email here>"
+RUN git config --global user.name  "<add name here>"
+
+RUN git clone https://github.com/golang-fips/go.git golang-fips && cd golang-fips && \
+    GOLANG_VER_SHORT=${GOLANG_VER%.*} && \
+    git fetch origin go${GOLANG_VER_SHORT}-fips-release && git checkout go${GOLANG_VER_SHORT}-fips-release &&  \
+    ./scripts/full-initialize-repo.sh go$GOLANG_VER
+
+RUN cd golang-fips/go && \
+    cd src && ./make.bash --no-clean
+
+# rm bootstrap golang
+RUN dnf -y erase golang
+
+ENV PATH=/golang-fips/go/bin:$PATH:/usr/local/go/bin
+ENV GOPATH=$HOME/go
+ENV PATH=$PATH:$GOPATH/bin
+
+RUN go version

scripts/build1.sh

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+#!/usr/bin/env bash
+# this script builds a go binary after applying openssl fips patches.
+
+set -x
+export GOLANG_VER=1.22.2
+[[ -d go ]] || ./scripts/full-initialize-repo.sh go$GOLANG_VER
+cd go/src
+export GO_BUILDTAGS+="goexperiment.strictfipsruntime"
+export CGO_ENABLED=1
+./make.bash --no-clean
+{ set +x ; } 2>/dev/null

scripts/build2.sh

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+#! /usr/bin/env bash
+# this script builds a go binary after applying openssl fips patches one by one.
+#
+export GOLANG_VER=1.22.2
+export GOLANG_REL=1
+
+# variables to store tar file names
+GO_TAR_NAME=go$GOLANG_VER
+PATCH_TAR_NAME=go$GOLANG_VER-$GOLANG_REL-openssl-fips
+GO_SRC_TAR=$GO_TAR_NAME.tar.gz
+PATCH_TAR=$PATCH_TAR_NAME.tar.gz
+
+# after untar, the dir names are stored in PATCH_DIR and SRC_DIR
+SRC_DIR=go-$GO_TAR_NAME
+PATCH_DIR=go-$PATCH_TAR_NAME
+TOP_DIR=/tmp/golang-fips/build2
+# If the go src dir ends up in a weird state where in patches are failing to apply, you might want to remove the $TOP_DIR (rm -rf /tmp/golang-fips/build2) to start with a clean slate.
+PATCH_PATH=$TOP_DIR/$PATCH_DIR/patches
+
+# this file stores state of last applied patch, that way patches are not reapplied
+PATCH_STATE=$TOP_DIR/state
+set -x
+[[ -d $TOP_DIR ]] || mkdir -p $TOP_DIR
+cd $TOP_DIR
+
+[[ -f $GO_SRC_TAR ]] || wget -q --show-progress https://github.com/golang/go/archive/refs/tags/$GO_SRC_TAR
+[[ -f $PATCH_TAR ]] || wget -q --show-progress https://github.com/golang-fips/go/archive/refs/tags/$PATCH_TAR
+[[ -d $SRC_DIR ]] || tar -xf $GO_SRC_TAR
+[[ -d $PATCH_DIR ]] || tar -xf $PATCH_TAR
+
+cd $SRC_DIR
+{ set +x; } 2>/dev/null
+if [[ -f $PATCH_STATE && "$(cat $PATCH_STATE)" == "complete" ]]; then
+    echo "patches already applied. skipping"
+else
+    for patch in $PATCH_PATH/*.patch; do
+        patch -p1 < "${patch}"
+        [[ $? -eq 0 ]] || { echo "incomplete" > $PATCH_STATE; break; exit 1; }
+    done
+fi
+
+echo "complete" > $PATCH_STATE
+# patches have been supplied successfully, simply build like above.
+set -x
+cd src
+export GO_BUILDTAGS+="goexperiment.strictfipsruntime,!no_openssl"
+export CGO_ENABLED=1
+./make.bash --no-clean
+{ set +x; } 2>/dev/null