From 9651de7bd4f4cd4cfe2256f4dfb41836ccb7a350 Mon Sep 17 00:00:00 2001
From: Malte Isberner <mi@stackrox.com>
Date: Wed, 17 Apr 2019 11:33:26 +0200
Subject: [PATCH] Fix lookup of hash algorithm

---
 pkcs7.go | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/pkcs7.go b/pkcs7.go
index 0264466..a123e86 100644
--- a/pkcs7.go
+++ b/pkcs7.go
@@ -301,8 +301,13 @@ func getHashForOID(oid asn1.ObjectIdentifier) (crypto.Hash, error) {
 	switch {
 	case oid.Equal(oidDigestAlgorithmSHA1):
 		return crypto.SHA1, nil
-  case oid.Equal(oidSHA256):
-    return crypto.SHA256, nil
+	case oid.Equal(oidSHA256):
+		return crypto.SHA256, nil
+	}
+	for _, algoDetails := range signatureAlgorithmDetails {
+		if oid.Equal(algoDetails.oid) {
+			return algoDetails.hash, nil
+		}
 	}
 	return crypto.Hash(0), ErrUnsupportedAlgorithm
 }