pkcs7: use crypto_shash_digest()

Use crypto_shash_digest() instead of crypto_shash_init() followed by
crypto_shash_finup().  (For simplicity only; they are equivalent.)

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: David Howells <dhowells@redhat.com>

1 files changed, 2 insertions, 5 deletions

diff --git a/crypto/asymmetric_keys/pkcs7_verify.c b/crypto/asymmetric_keys/pkcs7_verify.c
index 2d93d9eccb4d..255e84abdc69 100644
--- a/crypto/asymmetric_keys/pkcs7_verify.c
+++ b/crypto/asymmetric_keys/pkcs7_verify.c
@@ -59,11 +59,8 @@ static int pkcs7_digest(struct pkcs7_message *pkcs7,
         desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
 
         /* Digest the message [RFC2315 9.3] */
-        ret = crypto_shash_init(desc);
-        if (ret < 0)
-                goto error;
-        ret = crypto_shash_finup(desc, pkcs7->data, pkcs7->data_len,
-                                 sig->digest);
+        ret = crypto_shash_digest(desc, pkcs7->data, pkcs7->data_len,
+                                  sig->digest);
         if (ret < 0)
                 goto error;
         pr_devel("MsgDigest = [%*ph]\n", 8, sig->digest);