56 lines
1.6 KiB
Rust
56 lines
1.6 KiB
Rust
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// Copyright (c) Facebook, Inc. and its affiliates.
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//
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// This source code is licensed under the MIT license found in the
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// LICENSE file in the root directory of this source tree.
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//! Includes a series of tests for the group implementations
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use crate::errors::InternalError;
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use crate::group::Group;
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use crate::CipherSuite;
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// Test that the deserialization of a group element should throw an error
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// if the identity element can be deserialized properly
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#[test]
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fn test_group_properties() -> Result<(), InternalError> {
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use crate::tests::Ristretto255Sha512;
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test_identity_element_error::<Ristretto255Sha512>()?;
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test_zero_scalar_error::<Ristretto255Sha512>()?;
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#[cfg(feature = "p256")]
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{
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use crate::tests::P256Sha256;
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test_identity_element_error::<P256Sha256>()?;
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test_zero_scalar_error::<P256Sha256>()?;
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}
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Ok(())
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}
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// Checks that the identity element cannot be deserialized
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fn test_identity_element_error<CS: CipherSuite>() -> Result<(), InternalError> {
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let identity = CS::Group::identity();
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let result = CS::Group::from_element_slice(&identity.to_arr());
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assert!(match result {
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Err(InternalError::PointError) => true,
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_ => false,
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});
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Ok(())
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}
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// Checks that the zero scalar cannot be deserialized
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fn test_zero_scalar_error<CS: CipherSuite>() -> Result<(), InternalError> {
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let zero_scalar = CS::Group::scalar_zero();
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let result = CS::Group::from_scalar_slice(&CS::Group::scalar_as_bytes(zero_scalar));
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assert!(match result {
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Err(InternalError::ZeroScalarError) => true,
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_ => false,
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});
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Ok(())
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}
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