commit ffccda45df54974420f74a5b2b1e541445d51974
author Przemyslaw Stekiel <przemyslaw.stekiel@mobica.com> Tue Jan 11 14:44:01 2022 +0100
committer Przemyslaw Stekiel <przemyslaw.stekiel@mobica.com> Mon Jan 31 15:38:28 2022 +0100
tree 5578dc49548808108fb13d771b762ccea62609ae
parent ce37d11c67ec0e9159109956bdde4b823cba1ef5

ssl_tls12_populate_transform: store the en/decryption keys and alg in the new fields

Signed-off-by: Przemyslaw Stekiel <przemyslaw.stekiel@mobica.com>

library/ssl_tls.c

diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index ff56dcb..44b9c85 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -56,6 +56,9 @@
 #include "mbedtls/oid.h"
 #endif
 
+/* Convert key bits to byte size */
+#define KEY_BYTES( bits ) ( ( (size_t) bits + 7 ) / 8 )
+
 #if defined(MBEDTLS_SSL_PROTO_DTLS)
 
 #if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
@@ -720,6 +723,14 @@
     const mbedtls_cipher_info_t *cipher_info;
     const mbedtls_md_info_t *md_info;
 
+#if defined(MBEDTLS_USE_PSA_CRYPTO)
+    psa_key_type_t key_type;
+    psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
+    psa_algorithm_t alg;
+    size_t key_bits;
+    psa_status_t status;
+#endif
+
 #if !defined(MBEDTLS_DEBUG_C) && \
     !defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
     if( ssl->f_export_keys == NULL )
@@ -1077,6 +1088,40 @@
         goto end;
     }
 
+#if defined(MBEDTLS_USE_PSA_CRYPTO)
+    if( ( status = mbedtls_cipher_to_psa( cipher_info->type,
+                                 transform->taglen,
+                                 &alg,
+                                 &key_type,
+                                 &key_bits ) ) != PSA_SUCCESS )
+    {
+        MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_to_psa", status );
+        goto end;
+    }
+
+    psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_ENCRYPT | PSA_KEY_USAGE_DECRYPT );
+    psa_set_key_algorithm( &attributes, alg );
+
+    transform->psa_alg = alg;
+
+    if( ( status = psa_import_key( &attributes,
+                             key1,
+                             KEY_BYTES( key_bits ),
+                             &transform->psa_key_enc ) ) != PSA_SUCCESS )
+    {
+        MBEDTLS_SSL_DEBUG_RET( 1, "psa_import_key", status );
+        goto end;
+    }
+    if( ( status = psa_import_key( &attributes,
+                             key2,
+                             KEY_BYTES( key_bits ),
+                             &transform->psa_key_dec ) ) != PSA_SUCCESS )
+    {
+        MBEDTLS_SSL_DEBUG_RET( 1, "psa_import_key", status );
+        goto end;
+    }
+#endif /* MBEDTLS_USE_PSA_CRYPTO */
+
 #if defined(MBEDTLS_CIPHER_MODE_CBC)
     if( mbedtls_cipher_info_get_mode( cipher_info ) == MBEDTLS_MODE_CBC )
     {