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age crypto via kage, verified against the CCTV scrypt vectors

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Milestone 6. kage 0.4.0 over Jagged: Android-first (explicitly supports
API 26, matching minSdk), Kotlin, ships its own primitives through
BouncyCastle instead of relying on JCA ChaCha20-Poly1305 which Android
only provides from API 28. AgeBackupCrypto sits behind the same
BackupCrypto interface as the JCE baseline; age is now first in all()
so new encrypted backups are written as binary age v1 files,
decryptable anywhere with 'age -d' (decision #7). Old MDS1/JCE backups
keep decrypting via format auto-detection. The C2SP/CCTV scrypt vector
subset (19 files) is vendored into test resources: both success
vectors decrypt with matching payload SHA-256, all 17 failure vectors
are rejected.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
Ole-Morten Duesund 2026-06-10 14:00:34 +02:00
commit c66bee5cf0
25 changed files with 245 additions and 2 deletions
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app/build.gradle.kts
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@ -62,6 +62,7 @@ dependencies {
implementation(libs.work.runtime)
implementation(libs.okhttp)
implementation(libs.kotlinx.serialization.json)
implementation(libs.kage)
testImplementation(libs.junit)
}