crypto: testmgr - test IV value after a cipher operation

The crypto drivers are supposed to update the IV passed to the crypto
request before calling the completion callback.
Test for the IV value before considering the test as successful.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/testmgr.c

@@ -1034,12 +1034,22 @@ static int __test_skcipher(struct crypto_skcipher *tfm, int enc,
 
 		q = data;
 		if (memcmp(q, template[i].result, template[i].rlen)) {
-			pr_err("alg: skcipher%s: Test %d failed on %s for %s\n",
+			pr_err("alg: skcipher%s: Test %d failed (invalid result) on %s for %s\n",
 			       d, j, e, algo);
 			hexdump(q, template[i].rlen);
 			ret = -EINVAL;
 			goto out;
 		}
+
+		if (template[i].iv_out &&
+		    memcmp(iv, template[i].iv_out,
+			   crypto_skcipher_ivsize(tfm))) {
+			pr_err("alg: skcipher%s: Test %d failed (invalid output IV) on %s for %s\n",
+			       d, j, e, algo);
+			hexdump(iv, crypto_skcipher_ivsize(tfm));
+			ret = -EINVAL;
+			goto out;
+		}
 	}
 
 	j = 0;

crypto/testmgr.h

@@ -67,6 +67,7 @@ struct hash_testvec {
 struct cipher_testvec {
 	char *key;
 	char *iv;
+	char *iv_out;
 	char *input;
 	char *result;
 	unsigned short tap[MAX_TAP];