diff --git a/library/md.c b/library/md.c
index 90c6bff..a95763e 100644
--- a/library/md.c
+++ b/library/md.c
@@ -23,7 +23,23 @@
 
 #include "common.h"
 
-#if defined(MBEDTLS_MD_C)
+/*
+ * Availability of functions in this module is controlled by two
+ * feature macros:
+ * - MBEDTLS_MD_C enables the whole module;
+ * - MBEDTLS_MD_LIGHT enables only functions for hashing and accessing
+ * most hash metadata (everything except string names); is it
+ * automatically set whenever MBEDTLS_MD_C is defined.
+ *
+ * In this file, functions from MD_LIGHT are at the top, MD_C at the end.
+ *
+ * In the future we may want to change the contract of some functions
+ * (behaviour with NULL arguments) depending on whether MD_C is defined or
+ * only MD_LIGHT. Also, the exact scope of MD_LIGHT might vary.
+ *
+ * For these reasons, we're keeping MD_LIGHT internal for now.
+ */
+#if defined(MBEDTLS_MD_LIGHT)
 
 #include "mbedtls/md.h"
 #include "md_wrap.h"
@@ -39,6 +55,11 @@
 #include "mbedtls/sha3.h"
 #endif
 
+#if defined(MBEDTLS_MD_SOME_PSA)
+#include <psa/crypto.h>
+#include "psa_crypto_core.h"
+#endif
+
 #include "mbedtls/platform.h"
 
 #include <string.h>
@@ -47,7 +68,7 @@
 #include <stdio.h>
 #endif
 
-#if defined(MBEDTLS_MD5_C)
+#if defined(MBEDTLS_MD_CAN_MD5)
 const mbedtls_md_info_t mbedtls_md5_info = {
     "MD5",
     MBEDTLS_MD_MD5,
@@ -56,7 +77,7 @@
 };
 #endif
 
-#if defined(MBEDTLS_RIPEMD160_C)
+#if defined(MBEDTLS_MD_CAN_RIPEMD160)
 const mbedtls_md_info_t mbedtls_ripemd160_info = {
     "RIPEMD160",
     MBEDTLS_MD_RIPEMD160,
@@ -65,7 +86,7 @@
 };
 #endif
 
-#if defined(MBEDTLS_SHA1_C)
+#if defined(MBEDTLS_MD_CAN_SHA1)
 const mbedtls_md_info_t mbedtls_sha1_info = {
     "SHA1",
     MBEDTLS_MD_SHA1,
@@ -74,7 +95,7 @@
 };
 #endif
 
-#if defined(MBEDTLS_SHA224_C)
+#if defined(MBEDTLS_MD_CAN_SHA224)
 const mbedtls_md_info_t mbedtls_sha224_info = {
     "SHA224",
     MBEDTLS_MD_SHA224,
@@ -83,7 +104,7 @@
 };
 #endif
 
-#if defined(MBEDTLS_SHA256_C)
+#if defined(MBEDTLS_MD_CAN_SHA256)
 const mbedtls_md_info_t mbedtls_sha256_info = {
     "SHA256",
     MBEDTLS_MD_SHA256,
@@ -92,7 +113,7 @@
 };
 #endif
 
-#if defined(MBEDTLS_SHA384_C)
+#if defined(MBEDTLS_MD_CAN_SHA384)
 const mbedtls_md_info_t mbedtls_sha384_info = {
     "SHA384",
     MBEDTLS_MD_SHA384,
@@ -101,7 +122,7 @@
 };
 #endif
 
-#if defined(MBEDTLS_SHA512_C)
+#if defined(MBEDTLS_MD_CAN_SHA512)
 const mbedtls_md_info_t mbedtls_sha512_info = {
     "SHA512",
     MBEDTLS_MD_SHA512,
@@ -137,141 +158,34 @@
 };
 #endif
 
-
-/*
- * Reminder: update profiles in x509_crt.c when adding a new hash!
- */
-static const int supported_digests[] = {
-
-#if defined(MBEDTLS_SHA3_C)
-    MBEDTLS_MD_SHA3_512,
-    MBEDTLS_MD_SHA3_384,
-    MBEDTLS_MD_SHA3_256,
-    MBEDTLS_MD_SHA3_224,
-#endif
-
-#if defined(MBEDTLS_SHA512_C)
-    MBEDTLS_MD_SHA512,
-#endif
-
-#if defined(MBEDTLS_SHA384_C)
-    MBEDTLS_MD_SHA384,
-#endif
-
-#if defined(MBEDTLS_SHA256_C)
-    MBEDTLS_MD_SHA256,
-#endif
-#if defined(MBEDTLS_SHA224_C)
-    MBEDTLS_MD_SHA224,
-#endif
-
-#if defined(MBEDTLS_SHA1_C)
-    MBEDTLS_MD_SHA1,
-#endif
-
-#if defined(MBEDTLS_RIPEMD160_C)
-    MBEDTLS_MD_RIPEMD160,
-#endif
-
-#if defined(MBEDTLS_MD5_C)
-    MBEDTLS_MD_MD5,
-#endif
-
-    MBEDTLS_MD_NONE
-};
-
-const int *mbedtls_md_list(void)
-{
-    return supported_digests;
-}
-
-const mbedtls_md_info_t *mbedtls_md_info_from_string(const char *md_name)
-{
-    if (NULL == md_name) {
-        return NULL;
-    }
-
-    /* Get the appropriate digest information */
-#if defined(MBEDTLS_MD5_C)
-    if (!strcmp("MD5", md_name)) {
-        return mbedtls_md_info_from_type(MBEDTLS_MD_MD5);
-    }
-#endif
-#if defined(MBEDTLS_RIPEMD160_C)
-    if (!strcmp("RIPEMD160", md_name)) {
-        return mbedtls_md_info_from_type(MBEDTLS_MD_RIPEMD160);
-    }
-#endif
-#if defined(MBEDTLS_SHA1_C)
-    if (!strcmp("SHA1", md_name) || !strcmp("SHA", md_name)) {
-        return mbedtls_md_info_from_type(MBEDTLS_MD_SHA1);
-    }
-#endif
-#if defined(MBEDTLS_SHA224_C)
-    if (!strcmp("SHA224", md_name)) {
-        return mbedtls_md_info_from_type(MBEDTLS_MD_SHA224);
-    }
-#endif
-#if defined(MBEDTLS_SHA256_C)
-    if (!strcmp("SHA256", md_name)) {
-        return mbedtls_md_info_from_type(MBEDTLS_MD_SHA256);
-    }
-#endif
-#if defined(MBEDTLS_SHA384_C)
-    if (!strcmp("SHA384", md_name)) {
-        return mbedtls_md_info_from_type(MBEDTLS_MD_SHA384);
-    }
-#endif
-#if defined(MBEDTLS_SHA512_C)
-    if (!strcmp("SHA512", md_name)) {
-        return mbedtls_md_info_from_type(MBEDTLS_MD_SHA512);
-    }
-#endif
-#if defined(MBEDTLS_SHA3_C)
-    if (!strcmp("SHA3-224", md_name)) {
-        return mbedtls_md_info_from_type(MBEDTLS_MD_SHA3_224);
-    }
-    if (!strcmp("SHA3-256", md_name)) {
-        return mbedtls_md_info_from_type(MBEDTLS_MD_SHA3_256);
-    }
-    if (!strcmp("SHA3-384", md_name)) {
-        return mbedtls_md_info_from_type(MBEDTLS_MD_SHA3_384);
-    }
-    if (!strcmp("SHA3-512", md_name)) {
-        return mbedtls_md_info_from_type(MBEDTLS_MD_SHA3_512);
-    }
-#endif
-    return NULL;
-}
-
 const mbedtls_md_info_t *mbedtls_md_info_from_type(mbedtls_md_type_t md_type)
 {
     switch (md_type) {
-#if defined(MBEDTLS_MD5_C)
+#if defined(MBEDTLS_MD_CAN_MD5)
         case MBEDTLS_MD_MD5:
             return &mbedtls_md5_info;
 #endif
-#if defined(MBEDTLS_RIPEMD160_C)
+#if defined(MBEDTLS_MD_CAN_RIPEMD160)
         case MBEDTLS_MD_RIPEMD160:
             return &mbedtls_ripemd160_info;
 #endif
-#if defined(MBEDTLS_SHA1_C)
+#if defined(MBEDTLS_MD_CAN_SHA1)
         case MBEDTLS_MD_SHA1:
             return &mbedtls_sha1_info;
 #endif
-#if defined(MBEDTLS_SHA224_C)
+#if defined(MBEDTLS_MD_CAN_SHA224)
         case MBEDTLS_MD_SHA224:
             return &mbedtls_sha224_info;
 #endif
-#if defined(MBEDTLS_SHA256_C)
+#if defined(MBEDTLS_MD_CAN_SHA256)
         case MBEDTLS_MD_SHA256:
             return &mbedtls_sha256_info;
 #endif
-#if defined(MBEDTLS_SHA384_C)
+#if defined(MBEDTLS_MD_CAN_SHA384)
         case MBEDTLS_MD_SHA384:
             return &mbedtls_sha384_info;
 #endif
-#if defined(MBEDTLS_SHA512_C)
+#if defined(MBEDTLS_MD_CAN_SHA512)
         case MBEDTLS_MD_SHA512:
             return &mbedtls_sha512_info;
 #endif
@@ -290,18 +204,71 @@
     }
 }
 
-const mbedtls_md_info_t *mbedtls_md_info_from_ctx(
-    const mbedtls_md_context_t *ctx)
+#if defined(MBEDTLS_MD_SOME_PSA)
+static psa_algorithm_t psa_alg_of_md(const mbedtls_md_info_t *info)
 {
-    if (ctx == NULL) {
-        return NULL;
+    switch (info->type) {
+#if defined(MBEDTLS_MD_MD5_VIA_PSA)
+        case MBEDTLS_MD_MD5:
+            return PSA_ALG_MD5;
+#endif
+#if defined(MBEDTLS_MD_RIPEMD160_VIA_PSA)
+        case MBEDTLS_MD_RIPEMD160:
+            return PSA_ALG_RIPEMD160;
+#endif
+#if defined(MBEDTLS_MD_SHA1_VIA_PSA)
+        case MBEDTLS_MD_SHA1:
+            return PSA_ALG_SHA_1;
+#endif
+#if defined(MBEDTLS_MD_SHA224_VIA_PSA)
+        case MBEDTLS_MD_SHA224:
+            return PSA_ALG_SHA_224;
+#endif
+#if defined(MBEDTLS_MD_SHA256_VIA_PSA)
+        case MBEDTLS_MD_SHA256:
+            return PSA_ALG_SHA_256;
+#endif
+#if defined(MBEDTLS_MD_SHA384_VIA_PSA)
+        case MBEDTLS_MD_SHA384:
+            return PSA_ALG_SHA_384;
+#endif
+#if defined(MBEDTLS_MD_SHA512_VIA_PSA)
+        case MBEDTLS_MD_SHA512:
+            return PSA_ALG_SHA_512;
+#endif
+        default:
+            return PSA_ALG_NONE;
+    }
+}
+
+static int md_can_use_psa(const mbedtls_md_info_t *info)
+{
+    psa_algorithm_t alg = psa_alg_of_md(info);
+    if (alg == PSA_ALG_NONE) {
+        return 0;
     }
 
-    return ctx->MBEDTLS_PRIVATE(md_info);
+    return psa_can_do_hash(alg);
 }
 
+static int mbedtls_md_error_from_psa(psa_status_t status)
+{
+    switch (status) {
+        case PSA_SUCCESS:
+            return 0;
+        case PSA_ERROR_NOT_SUPPORTED:
+            return MBEDTLS_ERR_MD_FEATURE_UNAVAILABLE;
+        case PSA_ERROR_INSUFFICIENT_MEMORY:
+            return MBEDTLS_ERR_MD_ALLOC_FAILED;
+        default:
+            return MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED;
+    }
+}
+#endif /* MBEDTLS_MD_SOME_PSA */
+
 void mbedtls_md_init(mbedtls_md_context_t *ctx)
 {
+    /* Note: this sets engine (if present) to MBEDTLS_MD_ENGINE_LEGACY */
     memset(ctx, 0, sizeof(mbedtls_md_context_t));
 }
 
@@ -312,6 +279,11 @@
     }
 
     if (ctx->md_ctx != NULL) {
+#if defined(MBEDTLS_MD_SOME_PSA)
+        if (ctx->engine == MBEDTLS_MD_ENGINE_PSA) {
+            psa_hash_abort(ctx->md_ctx);
+        } else
+#endif
         switch (ctx->md_info->type) {
 #if defined(MBEDTLS_MD5_C)
             case MBEDTLS_MD_MD5:
@@ -363,11 +335,13 @@
         mbedtls_free(ctx->md_ctx);
     }
 
+#if defined(MBEDTLS_MD_C)
     if (ctx->hmac_ctx != NULL) {
         mbedtls_platform_zeroize(ctx->hmac_ctx,
                                  2 * ctx->md_info->block_size);
         mbedtls_free(ctx->hmac_ctx);
     }
+#endif
 
     mbedtls_platform_zeroize(ctx, sizeof(mbedtls_md_context_t));
 }
@@ -381,6 +355,21 @@
         return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
     }
 
+#if defined(MBEDTLS_MD_SOME_PSA)
+    if (src->engine != dst->engine) {
+        /* This can happen with src set to legacy because PSA wasn't ready
+         * yet, and dst to PSA because it became ready in the meantime.
+         * We currently don't support that case (we'd need to re-allocate
+         * md_ctx to the size of the appropriate MD context). */
+        return MBEDTLS_ERR_MD_FEATURE_UNAVAILABLE;
+    }
+
+    if (src->engine == MBEDTLS_MD_ENGINE_PSA) {
+        psa_status_t status = psa_hash_clone(src->md_ctx, dst->md_ctx);
+        return mbedtls_md_error_from_psa(status);
+    }
+#endif
+
     switch (src->md_info->type) {
 #if defined(MBEDTLS_MD5_C)
         case MBEDTLS_MD_MD5:
@@ -449,8 +438,23 @@
 
     ctx->md_info = md_info;
     ctx->md_ctx = NULL;
+#if defined(MBEDTLS_MD_C)
     ctx->hmac_ctx = NULL;
+#else
+    if (hmac != 0) {
+        return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
+    }
+#endif
 
+#if defined(MBEDTLS_MD_SOME_PSA)
+    if (md_can_use_psa(ctx->md_info)) {
+        ctx->md_ctx = mbedtls_calloc(1, sizeof(psa_hash_operation_t));
+        if (ctx->md_ctx == NULL) {
+            return MBEDTLS_ERR_MD_ALLOC_FAILED;
+        }
+        ctx->engine = MBEDTLS_MD_ENGINE_PSA;
+    } else
+#endif
     switch (md_info->type) {
 #if defined(MBEDTLS_MD5_C)
         case MBEDTLS_MD_MD5:
@@ -499,6 +503,7 @@
             return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
     }
 
+#if defined(MBEDTLS_MD_C)
     if (hmac != 0) {
         ctx->hmac_ctx = mbedtls_calloc(2, md_info->block_size);
         if (ctx->hmac_ctx == NULL) {
@@ -506,6 +511,7 @@
             return MBEDTLS_ERR_MD_ALLOC_FAILED;
         }
     }
+#endif
 
     return 0;
 }
@@ -517,6 +523,15 @@
         return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
     }
 
+#if defined(MBEDTLS_MD_SOME_PSA)
+    if (ctx->engine == MBEDTLS_MD_ENGINE_PSA) {
+        psa_algorithm_t alg = psa_alg_of_md(ctx->md_info);
+        psa_hash_abort(ctx->md_ctx);
+        psa_status_t status = psa_hash_setup(ctx->md_ctx, alg);
+        return mbedtls_md_error_from_psa(status);
+    }
+#endif
+
     switch (ctx->md_info->type) {
 #if defined(MBEDTLS_MD5_C)
         case MBEDTLS_MD_MD5:
@@ -567,6 +582,13 @@
         return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
     }
 
+#if defined(MBEDTLS_MD_SOME_PSA)
+    if (ctx->engine == MBEDTLS_MD_ENGINE_PSA) {
+        psa_status_t status = psa_hash_update(ctx->md_ctx, input, ilen);
+        return mbedtls_md_error_from_psa(status);
+    }
+#endif
+
     switch (ctx->md_info->type) {
 #if defined(MBEDTLS_MD5_C)
         case MBEDTLS_MD_MD5:
@@ -614,6 +636,15 @@
         return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
     }
 
+#if defined(MBEDTLS_MD_SOME_PSA)
+    if (ctx->engine == MBEDTLS_MD_ENGINE_PSA) {
+        size_t size = ctx->md_info->size;
+        psa_status_t status = psa_hash_finish(ctx->md_ctx,
+                                              output, size, &size);
+        return mbedtls_md_error_from_psa(status);
+    }
+#endif
+
     switch (ctx->md_info->type) {
 #if defined(MBEDTLS_MD5_C)
         case MBEDTLS_MD_MD5:
@@ -662,6 +693,16 @@
         return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
     }
 
+#if defined(MBEDTLS_MD_SOME_PSA)
+    if (md_can_use_psa(md_info)) {
+        size_t size = md_info->size;
+        psa_status_t status = psa_hash_compute(psa_alg_of_md(md_info),
+                                               input, ilen,
+                                               output, size, &size);
+        return mbedtls_md_error_from_psa(status);
+    }
+#endif
+
     switch (md_info->type) {
 #if defined(MBEDTLS_MD5_C)
         case MBEDTLS_MD_MD5:
@@ -706,6 +747,145 @@
     }
 }
 
+unsigned char mbedtls_md_get_size(const mbedtls_md_info_t *md_info)
+{
+    if (md_info == NULL) {
+        return 0;
+    }
+
+    return md_info->size;
+}
+
+mbedtls_md_type_t mbedtls_md_get_type(const mbedtls_md_info_t *md_info)
+{
+    if (md_info == NULL) {
+        return MBEDTLS_MD_NONE;
+    }
+
+    return md_info->type;
+}
+
+/************************************************************************
+ * Functions above this separator are part of MBEDTLS_MD_LIGHT,         *
+ * functions below are only available when MBEDTLS_MD_C is set.         *
+ ************************************************************************/
+#if defined(MBEDTLS_MD_C)
+
+/*
+ * Reminder: update profiles in x509_crt.c when adding a new hash!
+ */
+static const int supported_digests[] = {
+
+#if defined(MBEDTLS_MD_CAN_SHA512)
+    MBEDTLS_MD_SHA512,
+#endif
+
+#if defined(MBEDTLS_MD_CAN_SHA384)
+    MBEDTLS_MD_SHA384,
+#endif
+
+#if defined(MBEDTLS_MD_CAN_SHA256)
+    MBEDTLS_MD_SHA256,
+#endif
+#if defined(MBEDTLS_MD_CAN_SHA224)
+    MBEDTLS_MD_SHA224,
+#endif
+
+#if defined(MBEDTLS_MD_CAN_SHA1)
+    MBEDTLS_MD_SHA1,
+#endif
+
+#if defined(MBEDTLS_MD_CAN_RIPEMD160)
+    MBEDTLS_MD_RIPEMD160,
+#endif
+
+#if defined(MBEDTLS_MD_CAN_MD5)
+    MBEDTLS_MD_MD5,
+#endif
+#if defined(MBEDTLS_SHA3_C)
+    MBEDTLS_MD_SHA3_224,
+    MBEDTLS_MD_SHA3_256,
+    MBEDTLS_MD_SHA3_384,
+    MBEDTLS_MD_SHA3_512,
+#endif
+
+    MBEDTLS_MD_NONE
+};
+
+const int *mbedtls_md_list(void)
+{
+    return supported_digests;
+}
+
+const mbedtls_md_info_t *mbedtls_md_info_from_string(const char *md_name)
+{
+    if (NULL == md_name) {
+        return NULL;
+    }
+
+    /* Get the appropriate digest information */
+#if defined(MBEDTLS_MD_CAN_MD5)
+    if (!strcmp("MD5", md_name)) {
+        return mbedtls_md_info_from_type(MBEDTLS_MD_MD5);
+    }
+#endif
+#if defined(MBEDTLS_MD_CAN_RIPEMD160)
+    if (!strcmp("RIPEMD160", md_name)) {
+        return mbedtls_md_info_from_type(MBEDTLS_MD_RIPEMD160);
+    }
+#endif
+#if defined(MBEDTLS_MD_CAN_SHA1)
+    if (!strcmp("SHA1", md_name) || !strcmp("SHA", md_name)) {
+        return mbedtls_md_info_from_type(MBEDTLS_MD_SHA1);
+    }
+#endif
+#if defined(MBEDTLS_MD_CAN_SHA224)
+    if (!strcmp("SHA224", md_name)) {
+        return mbedtls_md_info_from_type(MBEDTLS_MD_SHA224);
+    }
+#endif
+#if defined(MBEDTLS_MD_CAN_SHA256)
+    if (!strcmp("SHA256", md_name)) {
+        return mbedtls_md_info_from_type(MBEDTLS_MD_SHA256);
+    }
+#endif
+#if defined(MBEDTLS_MD_CAN_SHA384)
+    if (!strcmp("SHA384", md_name)) {
+        return mbedtls_md_info_from_type(MBEDTLS_MD_SHA384);
+    }
+#endif
+#if defined(MBEDTLS_MD_CAN_SHA512)
+    if (!strcmp("SHA512", md_name)) {
+        return mbedtls_md_info_from_type(MBEDTLS_MD_SHA512);
+    }
+#endif
+#if defined(MBEDTLS_SHA3_C)
+    if (!strcmp("SHA3-224", md_name)) {
+        return mbedtls_md_info_from_type(MBEDTLS_MD_SHA3_224);
+    }
+    else if (!strcmp("SHA3-256", md_name)) {
+        return mbedtls_md_info_from_type(MBEDTLS_MD_SHA3_256);
+    }
+    else if (!strcmp("SHA3-384", md_name)) {
+        return mbedtls_md_info_from_type(MBEDTLS_MD_SHA3_384);
+    }
+    else if (!strcmp("SHA3-512", md_name)) {
+        return mbedtls_md_info_from_type(MBEDTLS_MD_SHA3_512);
+    }
+#endif
+    return NULL;
+}
+
+const mbedtls_md_info_t *mbedtls_md_info_from_ctx(
+    const mbedtls_md_context_t *ctx)
+{
+    if (ctx == NULL) {
+        return NULL;
+    }
+
+    return ctx->MBEDTLS_PRIVATE(md_info);
+}
+
 #if defined(MBEDTLS_FS_IO)
 int mbedtls_md_file(const mbedtls_md_info_t *md_info, const char *path, unsigned char *output)
 {
@@ -894,73 +1074,6 @@
     return ret;
 }
 
-int mbedtls_md_process(mbedtls_md_context_t *ctx, const unsigned char *data)
-{
-    if (ctx == NULL || ctx->md_info == NULL) {
-        return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
-    }
-
-    switch (ctx->md_info->type) {
-#if defined(MBEDTLS_MD5_C)
-        case MBEDTLS_MD_MD5:
-            return mbedtls_internal_md5_process(ctx->md_ctx, data);
-#endif
-#if defined(MBEDTLS_RIPEMD160_C)
-        case MBEDTLS_MD_RIPEMD160:
-            return mbedtls_internal_ripemd160_process(ctx->md_ctx, data);
-#endif
-#if defined(MBEDTLS_SHA1_C)
-        case MBEDTLS_MD_SHA1:
-            return mbedtls_internal_sha1_process(ctx->md_ctx, data);
-#endif
-#if defined(MBEDTLS_SHA224_C)
-        case MBEDTLS_MD_SHA224:
-            return mbedtls_internal_sha256_process(ctx->md_ctx, data);
-#endif
-#if defined(MBEDTLS_SHA256_C)
-        case MBEDTLS_MD_SHA256:
-            return mbedtls_internal_sha256_process(ctx->md_ctx, data);
-#endif
-#if defined(MBEDTLS_SHA384_C)
-        case MBEDTLS_MD_SHA384:
-            return mbedtls_internal_sha512_process(ctx->md_ctx, data);
-#endif
-#if defined(MBEDTLS_SHA512_C)
-        case MBEDTLS_MD_SHA512:
-            return mbedtls_internal_sha512_process(ctx->md_ctx, data);
-#endif
-#if defined(MBEDTLS_SHA3_C)
-        /* mbedtls_md_process() is used for test suite. Since, sha3.c does not
-           implement mbedtls_sha3_process(), we silently return 0 */
-        case MBEDTLS_MD_SHA3_224:
-        case MBEDTLS_MD_SHA3_256:
-        case MBEDTLS_MD_SHA3_384:
-        case MBEDTLS_MD_SHA3_512:
-            return 0;
-#endif
-        default:
-            return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
-    }
-}
-
-unsigned char mbedtls_md_get_size(const mbedtls_md_info_t *md_info)
-{
-    if (md_info == NULL) {
-        return 0;
-    }
-
-    return md_info->size;
-}
-
-mbedtls_md_type_t mbedtls_md_get_type(const mbedtls_md_info_t *md_info)
-{
-    if (md_info == NULL) {
-        return MBEDTLS_MD_NONE;
-    }
-
-    return md_info->type;
-}
-
 const char *mbedtls_md_get_name(const mbedtls_md_info_t *md_info)
 {
     if (md_info == NULL) {
@@ -971,3 +1084,5 @@
 }
 
 #endif /* MBEDTLS_MD_C */
+
+#endif /* MBEDTLS_MD_LIGHT */