diff --git a/src/tls/x509v3.c b/src/tls/x509v3.c
index 9f3959799..c8085c904 100644
--- a/src/tls/x509v3.c
+++ b/src/tls/x509v3.c
@@ -1553,7 +1553,7 @@ static int x509_digest_oid(struct asn1_oid *oid)
 }
 
 
-static int x509_sha1_oid(struct asn1_oid *oid)
+int x509_sha1_oid(struct asn1_oid *oid)
 {
 	return oid->len == 6 &&
 		oid->oid[0] == 1 /* iso */ &&
@@ -1579,21 +1579,21 @@ static int x509_sha2_oid(struct asn1_oid *oid)
 }
 
 
-static int x509_sha256_oid(struct asn1_oid *oid)
+int x509_sha256_oid(struct asn1_oid *oid)
 {
 	return x509_sha2_oid(oid) &&
 		oid->oid[8] == 1 /* sha256 */;
 }
 
 
-static int x509_sha384_oid(struct asn1_oid *oid)
+int x509_sha384_oid(struct asn1_oid *oid)
 {
 	return x509_sha2_oid(oid) &&
 		oid->oid[8] == 2 /* sha384 */;
 }
 
 
-static int x509_sha512_oid(struct asn1_oid *oid)
+int x509_sha512_oid(struct asn1_oid *oid)
 {
 	return x509_sha2_oid(oid) &&
 		oid->oid[8] == 3 /* sha512 */;
diff --git a/src/tls/x509v3.h b/src/tls/x509v3.h
index 9cd904afa..3e97313f4 100644
--- a/src/tls/x509v3.h
+++ b/src/tls/x509v3.h
@@ -142,4 +142,9 @@ x509_certificate_get_subject(struct x509_certificate *chain,
 			     struct x509_name *name);
 int x509_certificate_self_signed(struct x509_certificate *cert);
 
+int x509_sha1_oid(struct asn1_oid *oid);
+int x509_sha256_oid(struct asn1_oid *oid);
+int x509_sha384_oid(struct asn1_oid *oid);
+int x509_sha512_oid(struct asn1_oid *oid);
+
 #endif /* X509V3_H */