1 files changed, 13 insertions, 0 deletions
diff --git a/lib/vtls/nss.c b/lib/vtls/nss.c
index 5434ce382..91727c7c3 100644
--- a/lib/vtls/nss.c
+++ b/lib/vtls/nss.c
@@ -2041,6 +2041,19 @@ void Curl_nss_md5sum(unsigned char *tmp, /* input */
   PK11_DestroyContext(MD5pw, PR_TRUE);
 }
 
+void Curl_nss_sha256sum(const unsigned char *tmp, /* input */
+                     size_t tmplen,
+                     unsigned char *sha256sum, /* output */
+                     size_t sha256len)
+{
+  PK11Context *SHA256pw = PK11_CreateDigestContext(SEC_OID_SHA256);
+  unsigned int SHA256out;
+
+  PK11_DigestOp(SHA256pw, tmp, curlx_uztoui(tmplen));
+  PK11_DigestFinal(SHA256pw, sha256sum, &SHA256out, curlx_uztoui(sha256len));
+  PK11_DestroyContext(SHA256pw, PR_TRUE);
+}
+
 bool Curl_nss_cert_status_request(void)
 {
 #ifdef SSL_ENABLE_OCSP_STAPLING