create test to ensure interoperability with openssl tooling

Author: Alex Couture-Beil

Earthfile

@@ -14,6 +14,7 @@ RUN apk add --update --no-cache \
     less \
     make \
     openssl \
+    openssh-keygen \
     shellcheck \
     util-linux
 
@@ -86,7 +87,14 @@ secretshare-all:
     COPY +secretshare-darwin/secretshare ./secretshare-darwin-amd64
     SAVE ARTIFACT ./*
 
+test:
+    COPY +secretshare-linux/secretshare ./secretshare
+    RUN ./secretshare
+    RUN bash -c "echo -n hello | openssl pkeyutl -encrypt -pubin -inkey <(ssh-keygen -f ~/.secretshare.pub -e -m PKCS8) -pkeyopt rsa_padding_mode:oaep -pkeyopt rsa_oaep_md:sha256 -pkeyopt rsa_mgf1_md:sha256 | base64 | ./secretshare decrypt > output"
+    RUN bash -c "diff output <( echo -n hello)"
+
 release:
+    BUILD +test
     FROM node:13.10.1-alpine3.11
     RUN npm install -g github-release-cli@v1.3.1
     WORKDIR /release

build/linux/amd64/secretshare

@@ -188,7 +188,7 @@ func main() {
 			fmt.Fprintf(os.Stderr, "failed while decrypting: %s", err.Error())
 			os.Exit(1)
 		}
-		fmt.Println(data2)
+		fmt.Printf("%s", data2)
 		return
 	}
 
@@ -197,5 +197,5 @@ func main() {
 		fmt.Fprintf(os.Stderr, "failed while encrypting: %s", err.Error())
 		os.Exit(1)
 	}
-	fmt.Println(encrypted)
+	fmt.Printf("%s", encrypted)
 }