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Add test asserting XChaCha20-Poly1305 nonce length metadata matches XChaCha20

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- Verify AEADXChaCha20Poly1305.ivRange includes 24 but not 12.
- Ensure XChaCha20 accepts a 24-byte IV and rejects a 12-byte IV.
- Register the test in allTests.
This commit is contained in:
Marcin Krzyzanowski
2026-04-22 20:16:46 +02:00
parent 454c2b894c
commit a423c18b24
1 changed files with 11 additions and 0 deletions
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Tests/CryptoSwiftTests/XChaCha20Poly1305Tests.swift
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@@ -18,6 +18,16 @@ import XCTest
class XChaCha20Poly1305Tests: XCTestCase {
func testNonceLengthMetadataMatchesXChaCha20() {
XCTAssertTrue(AEADXChaCha20Poly1305.ivRange.contains(24))
XCTAssertFalse(AEADXChaCha20Poly1305.ivRange.contains(12))
let key = Array<UInt8>(repeating: 0, count: AEADXChaCha20Poly1305.kLen)
XCTAssertNoThrow(try XChaCha20(key: key, iv: Array<UInt8>(repeating: 0, count: 24)))
XCTAssertThrowsError(try XChaCha20(key: key, iv: Array<UInt8>(repeating: 0, count: 12)))
}
/// See: https://datatracker.ietf.org/doc/html/draft-irtf-cfrg-xchacha#appendix-A.3.1
func testRoundTrip() {
do {
@@ -73,6 +83,7 @@ class XChaCha20Poly1305Tests: XCTestCase {
}
static let allTests = [
("XChaCha20-Poly1305 nonce length metadata matches XChaCha20", testNonceLengthMetadataMatchesXChaCha20),
("Test Vector for AEAD_XCHACHA20_POLY1305", testRoundTrip)
]
}