diff --git a/wolfcrypt/src/ecc.c b/wolfcrypt/src/ecc.c
index f0ff1b626..4e45132f7 100644
--- a/wolfcrypt/src/ecc.c
+++ b/wolfcrypt/src/ecc.c
@@ -5580,6 +5580,48 @@ int wc_ecc_rs_to_sig(const char* r, const char* s, byte* out, word32* outlen)
     return err;
 }
 
+/**
+   Convert ECC R,S raw unsigned bin to signature
+   r       R component of signature
+   rSz     R size
+   s       S component of signature
+   sSz     S size
+   out     DER-encoded ECDSA signature
+   outlen  [in/out] output buffer size, output signature size
+   return  MP_OKAY on success
+*/
+int wc_ecc_rs_raw_to_sig(const byte* r, word32 rSz, const byte* s, word32 sSz,
+    byte* out, word32* outlen)
+{
+    int err;
+    mp_int rtmp;
+    mp_int stmp;
+
+    if (r == NULL || s == NULL || out == NULL || outlen == NULL)
+        return ECC_BAD_ARG_E;
+
+    err = mp_init_multi(&rtmp, &stmp, NULL, NULL, NULL, NULL);
+    if (err != MP_OKAY)
+        return err;
+
+    err = mp_read_unsigned_bin(&rtmp, r, rSz);
+    if (err == MP_OKAY)
+        err = mp_read_unsigned_bin(&stmp, s, sSz);
+
+    /* convert mp_ints to ECDSA sig, initializes rtmp and stmp internally */
+    if (err == MP_OKAY)
+        err = StoreECC_DSA_Sig(out, outlen, &rtmp, &stmp);
+
+    if (err == MP_OKAY) {
+        if (mp_iszero(&rtmp) == MP_YES || mp_iszero(&stmp) == MP_YES)
+            err = MP_ZERO_E;
+    }
+
+    mp_clear(&rtmp);
+    mp_clear(&stmp);
+
+    return err;
+}
 
 /**
    Convert ECC signature to R,S
diff --git a/wolfssl/wolfcrypt/ecc.h b/wolfssl/wolfcrypt/ecc.h
index b8033fc68..9def6519c 100644
--- a/wolfssl/wolfcrypt/ecc.h
+++ b/wolfssl/wolfcrypt/ecc.h
@@ -487,6 +487,9 @@ int wc_ecc_import_private_key_ex(const byte* priv, word32 privSz,
 WOLFSSL_API
 int wc_ecc_rs_to_sig(const char* r, const char* s, byte* out, word32* outlen);
 WOLFSSL_API
+int wc_ecc_rs_raw_to_sig(const byte* r, word32 rSz, const byte* s, word32 sSz,
+    byte* out, word32* outlen);
+WOLFSSL_API
 int wc_ecc_sig_to_rs(const byte* sig, word32 sigLen, byte* r, word32* rLen,
                    byte* s, word32* sLen);
 WOLFSSL_API