1 files changed, 116 insertions, 0 deletions
diff --git a/wallet/src/commonTest/kotlin/net/taler/lib/wallet/crypto/Sha512Test.kt b/wallet/src/commonTest/kotlin/net/taler/lib/wallet/crypto/Sha512Test.kt
new file mode 100644
index 0000000..59fd730
--- /dev/null
+++ b/wallet/src/commonTest/kotlin/net/taler/lib/wallet/crypto/Sha512Test.kt
@@ -0,0 +1,116 @@
+/*
+ * This file is part of GNU Taler
+ * (C) 2020 Taler Systems S.A.
+ *
+ * GNU Taler is free software; you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License as published by the Free Software
+ * Foundation; either version 3, or (at your option) any later version.
+ *
+ * GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ * A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+package net.taler.lib.wallet.crypto
+
+import net.taler.lib.wallet.Base32Crockford
+import kotlin.random.Random
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+class Sha512Test {
+
+    private val crypto = CryptoFactory.getCrypto()
+
+    @Test
+    fun testAbc() {
+        assertEquals(
+            "ddaf35a193617abacc417349ae20413112e6fa4e89a97ea20a9eeee64b55d39a2192992a274fc1a836ba3c23a3feebbd454d4423643ce80e2a9ac94fa54ca49f",
+            crypto.sha512("abc".encodeToByteArray()).toHexString()
+        )
+    }
+
+    @Test
+    fun testEmptyString() {
+        assertEquals(
+            "cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e",
+            crypto.sha512("".encodeToByteArray()).toHexString()
+        )
+    }
+
+    @Test
+    fun testAbc448bits() {
+        assertEquals(
+            "204a8fc6dda82f0a0ced7beb8e08a41657c16ef468b228a8279be331a703c33596fd15c13b1b07f9aa1d3bea57789ca031ad85c7a71dd70354ec631238ca3445",
+            crypto.sha512("abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq".encodeToByteArray()).toHexString()
+        )
+    }
+
+    @Test
+    fun testAbc896bits() {
+        assertEquals(
+            "8e959b75dae313da8cf4f72814fc143f8f7779c6eb9f7fa17299aeadb6889018501d289e4900f7e4331b99dec4b5433ac7d329eeb6dd26545e96e55b874be909",
+            crypto.sha512("abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu".encodeToByteArray())
+                .toHexString()
+        )
+    }
+
+    @Test
+    fun testAMillionAs() {
+        val input = ByteArray(1_000_000) { 0x61 }
+        assertEquals(
+            "e718483d0ce769644e2e42c7bc15b4638e1f98b13b2044285632a803afa973ebde0ff244877ea60a4cb0432ce577c31beb009c5c2c49aa2e4eadb217ad8cc09b",
+            crypto.sha512(input).toHexString()
+        )
+    }
+
+    @Test
+    fun testExchangeTvgHashCode() {
+        val input = "91JPRV3F5GG4EKJN41A62V35E8"
+        val output =
+            "CW96WR74JS8T53EC8GKSGD49QKH4ZNFTZXDAWMMV5GJ1E4BM6B8GPN5NVHDJ8ZVXNCW7Q4WBYCV61HCA3PZC2YJD850DT29RHHN7ESR"
+        assertEquals(output, Base32Crockford.encode(crypto.sha512(Base32Crockford.decode(input))))
+    }
+
+    @Test
+    fun testIncrementalHashing() {
+        val n = 1024
+        val d = Random.nextBytes(n)
+
+        val h1 = crypto.sha512(d)
+        val h2 = crypto.getHashSha512State().update(d).final()
+        assertEquals(Base32Crockford.encode(h1), Base32Crockford.encode(h2))
+
+        val s = crypto.getHashSha512State()
+        for (i in 0 until n) {
+            val b = ByteArray(1)
+            b[0] = d[i]
+            s.update(b)
+        }
+        val h3 = s.final()
+        assertEquals(Base32Crockford.encode(h1), Base32Crockford.encode(h3))
+    }
+
+    @Test
+    fun testIncrementalHashing2() {
+        val n = 10
+        val d = Random.nextBytes(n)
+
+        val h1 = crypto.sha512(d)
+        val h2 = crypto.getHashSha512State().update(d).final()
+        assertEquals(Base32Crockford.encode(h1), Base32Crockford.encode(h2))
+
+        val s = crypto.getHashSha512State()
+        for (i in 0 until n) {
+            val b = ByteArray(1)
+            b[0] = d[i]
+            s.update(b)
+        }
+        val h3 = s.final()
+        assertEquals(Base32Crockford.encode(h1), Base32Crockford.encode(h3))
+    }
+
+}