diff --git a/include/psa/crypto.h b/include/psa/crypto.h
index f8b8cea..ca804f0 100644
--- a/include/psa/crypto.h
+++ b/include/psa/crypto.h
@@ -463,7 +463,7 @@
  * For standard key types, the output format is as follows:
  *
  * - For RSA keys (#PSA_KEY_TYPE_RSA_KEYPAIR or #PSA_KEY_TYPE_RSA_PUBLIC_KEY),
- *   is the DER representation of the public key defined by RFC 5280
+ *   the format is the DER representation of the public key defined by RFC 5280
  *   as SubjectPublicKeyInfo.
  *
  * \param key           Slot whose content is to be exported. This must
diff --git a/library/psa_crypto.c b/library/psa_crypto.c
index 7e633a3..8f4cc20 100644
--- a/library/psa_crypto.c
+++ b/library/psa_crypto.c
@@ -521,6 +521,57 @@
 }
 
 
+psa_status_t psa_export_public_key(psa_key_slot_t key,
+    uint8_t *data,
+    size_t data_size,
+    size_t *data_length)
+{
+    key_slot_t *slot;
+    psa_status_t status;
+
+    if( key == 0 || key > MBEDTLS_PSA_KEY_SLOT_COUNT )
+        return( PSA_ERROR_EMPTY_SLOT );
+    status = psa_get_key_slot( key, &slot );
+    if( status != PSA_SUCCESS)
+        return( status );
+    if( slot->type == PSA_KEY_TYPE_NONE )
+        return( PSA_ERROR_EMPTY_SLOT );   
+
+    if( !(PSA_KEY_TYPE_IS_PUBLIC_KEY( slot->type ) || PSA_KEY_TYPE_IS_KEYPAIR(slot->type))  )
+        return( PSA_ERROR_INVALID_ARGUMENT );   
+    
+#if defined(MBEDTLS_PK_WRITE_C)
+    if( slot->type == PSA_KEY_TYPE_RSA_PUBLIC_KEY ||
+        slot->type == PSA_KEY_TYPE_RSA_KEYPAIR ||
+        PSA_KEY_TYPE_IS_ECC( slot->type ) )
+    {
+        mbedtls_pk_context pk;
+        int ret;
+        mbedtls_pk_init( &pk );
+        if( slot->type == PSA_KEY_TYPE_RSA_PUBLIC_KEY ||
+            slot->type == PSA_KEY_TYPE_RSA_KEYPAIR )
+        {
+            pk.pk_info = &mbedtls_rsa_info;
+            pk.pk_ctx = slot->data.rsa;
+        }
+        else
+        {
+            pk.pk_info = &mbedtls_eckey_info;
+            pk.pk_ctx = slot->data.ecp;
+        }
+        ret = mbedtls_pk_write_pubkey_der( &pk, data, data_size );
+        if( ret < 0 )
+            return( mbedtls_to_psa_error( ret ) );
+        *data_length = ret;
+        return( PSA_SUCCESS );
+    }
+#endif /* defined(MBEDTLS_PK_WRITE_C) */
+    /* This shouldn't happen in the reference implementation, but
+        it is valid for a special-purpose implementation to omit
+        support for exporting certain key types. */
+    return( PSA_ERROR_NOT_SUPPORTED );
+}
+
 
 /****************************************************************/
 /* Message digests */
diff --git a/tests/suites/test_suite_psa_crypto.data b/tests/suites/test_suite_psa_crypto.data
index 38f4b80..15c424e 100644
--- a/tests/suites/test_suite_psa_crypto.data
+++ b/tests/suites/test_suite_psa_crypto.data
@@ -104,3 +104,12 @@
 
 PSA Key Lifetime set fail, invalid key lifetime value
 key_lifetime_set_fail:1:PSA_KEY_LIFETIME_PERSISTENT+1:PSA_ERROR_INVALID_ARGUMENT
+
+PSA import/export RSA public key: good, 1024-bit
+depends_on:MBEDTLS_PK_C:MBEDTLS_PK_PARSE_C:MBEDTLS_RSA_C
+import_export_public_key:"30819f300d06092a864886f70d010101050003818d0030818902818100af057d396ee84fb75fdbb5c2b13c7fe5a654aa8aa2470b541ee1feb0b12d25c79711531249e1129628042dbbb6c120d1443524ef4c0e6e1d8956eeb2077af12349ddeee54483bc06c2c61948cd02b202e796aebd94d3a7cbf859c2c1819c324cb82b9cd34ede263a2abffe4733f077869e8660f7d6834da53d690ef7985f6bc30203010001":PSA_KEY_TYPE_RSA_PUBLIC_KEY:1024:0:PSA_SUCCESS:1
+
+PSA import/export RSA keypair: good, 1024-bit
+depends_on:MBEDTLS_PK_C:MBEDTLS_PK_PARSE_C:MBEDTLS_RSA_C
+import_export_public_key:"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":PSA_KEY_TYPE_RSA_KEYPAIR:1024:0:PSA_SUCCESS:1
+