examples/fips_validation: fix digest length in AES-GCM

[ upstream commit 94dfc563b620b2f04db7c59b6fdee458a9e1d481 ]

For AES GCM non JSON decrypt test cases the digest length
is being set incorrectly.The digest length is not being
cleared after test cases, causing an issue when running
tests individually without the --path-is-folder flag.
This fix adds the digest length correctly to the decrypt
cases and clears the digest length after each test file.

Fixes: 4aaad29 ("examples/fips_validation: support GCM parsing")

Signed-off-by: Samina Arshad <samina.arshad@intel.com>
Acked-by: Brian Dooley <brian.dooley@intel.com>
Acked-by: Gowrishankar Muthukrishnan <gmuthukrishn@marvell.com>

examples/fips_validation/main.c

@@ -713,7 +713,7 @@ prepare_aead_op(void)
 			RTE_LOG(ERR, USER1, "Not enough memory\n");
 			return -ENOMEM;
 		}
-		env.digest_len = vec.cipher_auth.digest.len;
+		env.digest_len = vec.aead.digest.len;
 
 		sym->aead.data.length = vec.pt.len;
 		sym->aead.digest.data = env.digest;
@@ -722,7 +722,7 @@ prepare_aead_op(void)
 		ret = prepare_data_mbufs(&vec.ct);
 		if (ret < 0)
 			return ret;
-
+		env.digest_len = vec.aead.digest.len;
 		sym->aead.data.length = vec.ct.len;
 		sym->aead.digest.data = vec.aead.digest.val;
 		sym->aead.digest.phys_addr = rte_malloc_virt2iova(
@@ -1850,6 +1850,7 @@ fips_test_one_file(void)
 	if (env.digest) {
 		rte_free(env.digest);
 		env.digest = NULL;
+		env.digest_len = 0;
 	}
 	if (env.mbuf)
 		rte_pktmbuf_free(env.mbuf);