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# encoding: binary
# frozen_string_literal: true
RSpec.shared_examples "box" do
let(:nonce) { vector :box_nonce }
let(:invalid_nonce) { nonce[0, 12] } # too short!
let(:invalid_nonce_long) { nonce + nonce } # too long!
let(:message) { vector :box_message }
let(:ciphertext) { vector :box_ciphertext }
let(:nonce_error_regex) { /Nonce.*(Expected #{box.nonce_bytes})/ }
let(:corrupt_ciphertext) { ciphertext[80] = " " } # picked at random by fair diceroll
context "box" do
it "encrypts a message" do
expect(box.box(nonce, message)).to eq ciphertext
end
it "raises on a short nonce" do
expect do
box.box(invalid_nonce, message)
end.to raise_error(RbNaCl::LengthError, nonce_error_regex)
end
it "raises on a long nonce" do
expect do
box.box(invalid_nonce_long, message)
end.to raise_error(RbNaCl::LengthError, nonce_error_regex)
end
end
context "open" do
it "decrypts a message" do
expect(box.open(nonce, ciphertext)).to eq message
end
it "raises on a truncated message to decrypt" do
expect do
box.open(nonce, ciphertext[0, 64])
end.to raise_error(RbNaCl::CryptoError, /Decryption failed. Ciphertext failed verification./)
end
it "raises on a corrupt ciphertext" do
expect do
box.open(nonce, corrupt_ciphertext)
end.to raise_error(RbNaCl::CryptoError, /Decryption failed. Ciphertext failed verification./)
end
it "raises on a short nonce" do
expect do
box.open(invalid_nonce, message)
end.to raise_error(RbNaCl::LengthError, nonce_error_regex)
end
it "raises on a long nonce" do
expect do
box.open(invalid_nonce_long, message)
end.to raise_error(RbNaCl::LengthError, nonce_error_regex)
end
end
end
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