diff --git a/library/ecdsa.c b/library/ecdsa.c
index 22fb5e3..dfdd0b4 100644
--- a/library/ecdsa.c
+++ b/library/ecdsa.c
@@ -416,6 +416,9 @@
 #if defined(MBEDTLS_ECDSA_DETERMINISTIC)
 /*
  * Deterministic signature wrapper
+ *
+ * \note    The f_rng_blind parameter must not be \c NULL.
+ *
  */
 static int ecdsa_sign_det_restartable( mbedtls_ecp_group *grp,
                     mbedtls_mpi *r, mbedtls_mpi *s,
@@ -469,69 +472,9 @@
     ret = mbedtls_ecdsa_sign( grp, r, s, d, buf, blen,
                               mbedtls_hmac_drbg_random, p_rng );
 #else
-    if( f_rng_blind != NULL )
-        ret = ecdsa_sign_restartable( grp, r, s, d, buf, blen,
-                                      mbedtls_hmac_drbg_random, p_rng,
-                                      f_rng_blind, p_rng_blind, rs_ctx );
-    else
-    {
-        mbedtls_hmac_drbg_context *p_rng_blind_det;
-
-#if !defined(MBEDTLS_ECP_RESTARTABLE)
-        /*
-         * To avoid reusing rng_ctx and risking incorrect behavior we seed a
-         * second HMAC-DRBG with the same seed. We also apply a label to avoid
-         * reusing the bits of the ephemeral key for blinding and eliminate the
-         * risk that they leak this way.
-         */
-        const char* blind_label = "BLINDING CONTEXT";
-        mbedtls_hmac_drbg_context rng_ctx_blind;
-
-        mbedtls_hmac_drbg_init( &rng_ctx_blind );
-        p_rng_blind_det = &rng_ctx_blind;
-        mbedtls_hmac_drbg_seed_buf( p_rng_blind_det, md_info,
-                                    data, 2 * grp_len );
-        ret = mbedtls_hmac_drbg_update_ret( p_rng_blind_det,
-                                            (const unsigned char*) blind_label,
-                                            strlen( blind_label ) );
-        if( ret != 0 )
-        {
-            mbedtls_hmac_drbg_free( &rng_ctx_blind );
-            goto cleanup;
-        }
-#else
-        /*
-         * In the case of restartable computations we would either need to store
-         * the second RNG in the restart context too or set it up at every
-         * restart. The first option would penalize the correct application of
-         * the function and the second would defeat the purpose of the
-         * restartable feature.
-         *
-         * Therefore in this case we reuse the original RNG. This comes with the
-         * price that the resulting signature might not be a valid deterministic
-         * ECDSA signature with a very low probability (same magnitude as
-         * successfully guessing the private key). However even then it is still
-         * a valid ECDSA signature.
-         */
-        p_rng_blind_det = p_rng;
-#endif /* MBEDTLS_ECP_RESTARTABLE */
-
-        /*
-         * Since the output of the RNGs is always the same for the same key and
-         * message, this limits the efficiency of blinding and leaks information
-         * through side channels. After mbedtls_ecdsa_sign_det() is removed NULL
-         * won't be a valid value for f_rng_blind anymore. Therefore it should
-         * be checked by the caller and this branch and check can be removed.
-         */
-        ret = ecdsa_sign_restartable( grp, r, s, d, buf, blen,
-                                      mbedtls_hmac_drbg_random, p_rng,
-                                      mbedtls_hmac_drbg_random, p_rng_blind_det,
-                                      rs_ctx );
-
-#if !defined(MBEDTLS_ECP_RESTARTABLE)
-        mbedtls_hmac_drbg_free( &rng_ctx_blind );
-#endif
-    }
+	ret = ecdsa_sign_restartable( grp, r, s, d, buf, blen,
+								  mbedtls_hmac_drbg_random, p_rng,
+								  f_rng_blind, p_rng_blind, rs_ctx );
 #endif /* MBEDTLS_ECDSA_SIGN_ALT */
 
 cleanup:
@@ -544,26 +487,8 @@
 }
 
 /*
- * Deterministic signature wrappers
+ * Deterministic signature wrapper
  */
-
-#if !defined(MBEDTLS_DEPRECATED_REMOVED)
-int mbedtls_ecdsa_sign_det( mbedtls_ecp_group *grp, mbedtls_mpi *r,
-                            mbedtls_mpi *s, const mbedtls_mpi *d,
-                            const unsigned char *buf, size_t blen,
-                            mbedtls_md_type_t md_alg )
-{
-    ECDSA_VALIDATE_RET( grp   != NULL );
-    ECDSA_VALIDATE_RET( r     != NULL );
-    ECDSA_VALIDATE_RET( s     != NULL );
-    ECDSA_VALIDATE_RET( d     != NULL );
-    ECDSA_VALIDATE_RET( buf   != NULL || blen == 0 );
-
-    return( ecdsa_sign_det_restartable( grp, r, s, d, buf, blen, md_alg,
-                                        NULL, NULL, NULL ) );
-}
-#endif /* MBEDTLS_DEPRECATED_REMOVED */
-
 int mbedtls_ecdsa_sign_det_ext( mbedtls_ecp_group *grp, mbedtls_mpi *r,
                                 mbedtls_mpi *s, const mbedtls_mpi *d,
                                 const unsigned char *buf, size_t blen,
@@ -750,10 +675,11 @@
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     mbedtls_mpi r, s;
-    ECDSA_VALIDATE_RET( ctx  != NULL );
-    ECDSA_VALIDATE_RET( hash != NULL );
-    ECDSA_VALIDATE_RET( sig  != NULL );
-    ECDSA_VALIDATE_RET( slen != NULL );
+    ECDSA_VALIDATE_RET( ctx   != NULL );
+    ECDSA_VALIDATE_RET( hash  != NULL );
+    ECDSA_VALIDATE_RET( sig   != NULL );
+    ECDSA_VALIDATE_RET( slen  != NULL );
+    ECDSA_VALIDATE_RET( f_rng != NULL );
 
     mbedtls_mpi_init( &r );
     mbedtls_mpi_init( &s );
@@ -803,22 +729,6 @@
                 ctx, md_alg, hash, hlen, sig, slen, f_rng, p_rng, NULL ) );
 }
 
-#if !defined(MBEDTLS_DEPRECATED_REMOVED) && \
-    defined(MBEDTLS_ECDSA_DETERMINISTIC)
-int mbedtls_ecdsa_write_signature_det( mbedtls_ecdsa_context *ctx,
-                               const unsigned char *hash, size_t hlen,
-                               unsigned char *sig, size_t *slen,
-                               mbedtls_md_type_t md_alg )
-{
-    ECDSA_VALIDATE_RET( ctx  != NULL );
-    ECDSA_VALIDATE_RET( hash != NULL );
-    ECDSA_VALIDATE_RET( sig  != NULL );
-    ECDSA_VALIDATE_RET( slen != NULL );
-    return( mbedtls_ecdsa_write_signature( ctx, md_alg, hash, hlen, sig, slen,
-                                   NULL, NULL ) );
-}
-#endif
-
 /*
  * Read and check signature
  */