diff --git a/library/use_psa_helpers.h b/library/use_psa_helpers.h
new file mode 100644
index 0000000..6b63ce8
--- /dev/null
+++ b/library/use_psa_helpers.h
@@ -0,0 +1,58 @@
+/**
+ *  Internal macros for parts of the code governed by MBEDTLS_USE_PSA_CRYPTO.
+ *  These macros allow checking if an algorithm is available, either via the
+ *  legacy API or the PSA Crypto API, depending on MBEDTLS_USE_PSA_CRYPTO.
+ *  When possible, they're named after the corresponding PSA_WANT_ macro.
+ *
+ *  Copyright The Mbed TLS Contributors
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License"); you may
+ *  not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+#ifndef MBEDTLS_USE_PSA_HELPERS_H
+#define MBEDTLS_USE_PSA_HELPERS_H
+
+#include "common.h"
+
+/* Hash algorithms */
+#if ( !defined(MBEDTLS_USE_PSA_CRYPTO) && defined(MBEDTLS_MD5_C) ) || \
+    ( defined(MBEDTLS_USE_PSA_CRYPTO) && defined(PSA_WANT_ALG_MD5) )
+#define MBEDTLS_USE_PSA_WANT_ALG_MD5
+#endif
+#if ( !defined(MBEDTLS_USE_PSA_CRYPTO) && defined(MBEDTLS_RIPEMD160_C) ) || \
+    ( defined(MBEDTLS_USE_PSA_CRYPTO) && defined(PSA_WANT_ALG_RIPEMD160) )
+#define MBEDTLS_USE_PSA_WANT_ALG_RIPEMD160
+#endif
+#if ( !defined(MBEDTLS_USE_PSA_CRYPTO) && defined(MBEDTLS_SHA1_C) ) || \
+    ( defined(MBEDTLS_USE_PSA_CRYPTO) && defined(PSA_WANT_ALG_SHA_1) )
+#define MBEDTLS_USE_PSA_WANT_ALG_SHA_1
+#endif
+#if ( !defined(MBEDTLS_USE_PSA_CRYPTO) && defined(MBEDTLS_SHA224_C) ) || \
+    ( defined(MBEDTLS_USE_PSA_CRYPTO) && defined(PSA_WANT_ALG_SHA_224) )
+#define MBEDTLS_USE_PSA_WANT_ALG_SHA_224
+#endif
+#if ( !defined(MBEDTLS_USE_PSA_CRYPTO) && defined(MBEDTLS_SHA256_C) ) || \
+    ( defined(MBEDTLS_USE_PSA_CRYPTO) && defined(PSA_WANT_ALG_SHA_256) )
+#define MBEDTLS_USE_PSA_WANT_ALG_SHA_256
+#endif
+#if ( !defined(MBEDTLS_USE_PSA_CRYPTO) && defined(MBEDTLS_SHA384_C) ) || \
+    ( defined(MBEDTLS_USE_PSA_CRYPTO) && defined(PSA_WANT_ALG_SHA_384) )
+#define MBEDTLS_USE_PSA_WANT_ALG_SHA_384
+#endif
+#if ( !defined(MBEDTLS_USE_PSA_CRYPTO) && defined(MBEDTLS_SHA512_C) ) || \
+    ( defined(MBEDTLS_USE_PSA_CRYPTO) && defined(PSA_WANT_ALG_SHA_512) )
+#define MBEDTLS_USE_PSA_WANT_ALG_SHA_512
+#endif
+
+#endif /* MBEDTLS_USE_PSA_HELPERS_H */