diff --git a/library/psa_crypto_hash.c b/library/psa_crypto_hash.c
index 4d1afc2..2678738 100644
--- a/library/psa_crypto_hash.c
+++ b/library/psa_crypto_hash.c
@@ -83,6 +83,59 @@
 #define INCLUDE_HASH_CORE       1
 #endif
 
+#if defined(MBEDTLS_PSA_BUILTIN_ALG_RSA_PKCS1V15_SIGN) || \
+    defined(MBEDTLS_PSA_BUILTIN_ALG_RSA_OAEP) || \
+    defined(MBEDTLS_PSA_BUILTIN_ALG_RSA_PSS) || \
+    defined(MBEDTLS_PSA_BUILTIN_ALG_DETERMINISTIC_ECDSA)
+const mbedtls_md_info_t *mbedtls_md_info_from_psa( psa_algorithm_t alg )
+{
+    switch( alg )
+    {
+#if defined(MBEDTLS_MD2_C)
+        case PSA_ALG_MD2:
+            return( &mbedtls_md2_info );
+#endif
+#if defined(MBEDTLS_MD4_C)
+        case PSA_ALG_MD4:
+            return( &mbedtls_md4_info );
+#endif
+#if defined(MBEDTLS_MD5_C)
+        case PSA_ALG_MD5:
+            return( &mbedtls_md5_info );
+#endif
+#if defined(MBEDTLS_RIPEMD160_C)
+        case PSA_ALG_RIPEMD160:
+            return( &mbedtls_ripemd160_info );
+#endif
+#if defined(MBEDTLS_SHA1_C)
+        case PSA_ALG_SHA_1:
+            return( &mbedtls_sha1_info );
+#endif
+#if defined(MBEDTLS_SHA256_C)
+        case PSA_ALG_SHA_224:
+            return( &mbedtls_sha224_info );
+#endif
+#if defined(MBEDTLS_SHA256_C)
+        case PSA_ALG_SHA_256:
+            return( &mbedtls_sha256_info );
+#endif
+#if defined(MBEDTLS_SHA512_C) && !defined(MBEDTLS_SHA512_NO_SHA384)
+        case PSA_ALG_SHA_384:
+            return( &mbedtls_sha384_info );
+#endif
+#if defined(MBEDTLS_SHA512_C)
+        case PSA_ALG_SHA_512:
+            return( &mbedtls_sha512_info );
+#endif
+        default:
+            return( NULL );
+    }
+}
+#endif /* defined(MBEDTLS_PSA_BUILTIN_ALG_RSA_PKCS1V15_SIGN) ||
+        * defined(MBEDTLS_PSA_BUILTIN_ALG_RSA_OAEP) ||
+        * defined(MBEDTLS_PSA_BUILTIN_ALG_RSA_PSS) ||
+        * defined(MBEDTLS_PSA_BUILTIN_ALG_DETERMINISTIC_ECDSA) */
+
 /* Implement the PSA driver hash interface on top of mbed TLS if either the
  * software driver or the test driver requires it. */
 #if defined(INCLUDE_HASH_CORE)