crypto: testmgr - Handle AEAD test vectors expected to fail verification

Add infrastructure to tcrypt/testmgr to support handling ccm decryption
test vectors that are expected to fail verification.
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/testmgr.c

@@ -363,6 +363,16 @@ static int test_aead(struct crypto_aead *tfm, int enc,
 
 			switch (ret) {
 			case 0:
+				if (template[i].novrfy) {
+					/* verification was supposed to fail */
+					printk(KERN_ERR "alg: aead: %s failed "
+					       "on test %d for %s: ret was 0, "
+					       "expected -EBADMSG\n",
+					       e, j, algo);
+					/* so really, we got a bad message */
+					ret = -EBADMSG;
+					goto out;
+				}
 				break;
 			case -EINPROGRESS:
 			case -EBUSY:
@@ -372,6 +382,10 @@ static int test_aead(struct crypto_aead *tfm, int enc,
 					INIT_COMPLETION(result.completion);
 					break;
 				}
+			case -EBADMSG:
+				if (template[i].novrfy)
+					/* verification failure was expected */
+					continue;
 				/* fall through */
 			default:
 				printk(KERN_ERR "alg: aead: %s failed on test "
@@ -481,6 +495,16 @@ static int test_aead(struct crypto_aead *tfm, int enc,
 
 			switch (ret) {
 			case 0:
+				if (template[i].novrfy) {
+					/* verification was supposed to fail */
+					printk(KERN_ERR "alg: aead: %s failed "
+					       "on chunk test %d for %s: ret "
+					       "was 0, expected -EBADMSG\n",
+					       e, j, algo);
+					/* so really, we got a bad message */
+					ret = -EBADMSG;
+					goto out;
+				}
 				break;
 			case -EINPROGRESS:
 			case -EBUSY:
@@ -490,6 +514,10 @@ static int test_aead(struct crypto_aead *tfm, int enc,
 					INIT_COMPLETION(result.completion);
 					break;
 				}
+			case -EBADMSG:
+				if (template[i].novrfy)
+					/* verification failure was expected */
+					continue;
 				/* fall through */
 			default:
 				printk(KERN_ERR "alg: aead: %s failed on "

crypto/testmgr.h

@@ -62,6 +62,7 @@ struct aead_testvec {
 	int np;
 	int anp;
 	unsigned char fail;
+	unsigned char novrfy;	/* ccm dec verification failure expected */
 	unsigned char wk; /* weak key flag */
 	unsigned char klen;
 	unsigned short ilen;