crypto: tcrypt - Fix AEAD chunk testing

My changeset 2a5b3098e64ce75b01559789b542038b5ae8f945

	crypto: tcrpyt - Remove unnecessary kmap/kunmap calls

introduced a typo that broke AEAD chunk testing.  In particular,
axbuf should really be xbuf.

There is also an issue with testing the last segment when encrypting.
The additional part produced by AEAD wasn't tested.  Similarly, on
decryption the additional part of the AEAD input is mistaken for
corruption.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 19 insertions, 9 deletions

diff --git a/crypto/tcrypt.c b/crypto/tcrypt.c
index 59821a22..66368022 100644
--- a/crypto/tcrypt.c
+++ b/crypto/tcrypt.c
@@ -481,21 +481,31 @@ next_one:
 
 			for (k = 0, temp = 0; k < template[i].np; k++) {
 				printk(KERN_INFO "page %u\n", k);
-				q = &axbuf[IDX[k]];
-				hexdump(q, template[i].tap[k]);
+				q = &xbuf[IDX[k]];
+
+				n = template[i].tap[k];
+				if (k == template[i].np - 1)
+					n += enc ? authsize : -authsize;
+				hexdump(q, n);
 				printk(KERN_INFO "%s\n",
-				       memcmp(q, template[i].result + temp,
-					      template[i].tap[k] -
-					      (k < template[i].np - 1 || enc ?
-					       0 : authsize)) ?
+				       memcmp(q, template[i].result + temp, n) ?
 				       "fail" : "pass");
 
-				for (n = 0; q[template[i].tap[k] + n]; n++)
-					;
+				q += n;
+				if (k == template[i].np - 1 && !enc) {
+					if (memcmp(q, template[i].input +
+						      temp + n, authsize))
+						n = authsize;
+					else
+						n = 0;
+				} else {
+					for (n = 0; q[n]; n++)
+						;
+				}
 				if (n) {
 					printk("Result buffer corruption %u "
 					       "bytes:\n", n);
-					hexdump(&q[template[i].tap[k]], n);
+					hexdump(q, n);
 				}
 
 				temp += template[i].tap[k];