[Cryptech-Commits] [sw/stm32] branch js_keywrap updated: Add timing tests for key unwrap.

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paul at psgd.org pushed a commit to branch js_keywrap
in repository sw/stm32.

The following commit(s) were added to refs/heads/js_keywrap by this push:
     new a9ef90a  Add timing tests for key unwrap.
a9ef90a is described below

commit a9ef90a4cfde26f858460e65805c84cd38b4a285
Author: Paul Selkirk <paul at psgd.org>
AuthorDate: Thu Aug 16 17:38:03 2018 -0400

    Add timing tests for key unwrap.
---
 projects/cli-test/mgmt-keywrap.c | 50 ++++++++++++++++++++++++++++++++--------
 1 file changed, 40 insertions(+), 10 deletions(-)

diff --git a/projects/cli-test/mgmt-keywrap.c b/projects/cli-test/mgmt-keywrap.c
index 798206d..1f98658 100644
--- a/projects/cli-test/mgmt-keywrap.c
+++ b/projects/cli-test/mgmt-keywrap.c
@@ -165,10 +165,7 @@ static int cmd_keywrap_test(struct cli_def *cli, const char *command, char *argv
 
     cli_print(cli, "\n2. Test vectors with keywrap core");
     if (hal_aes_use_keywrap_core(1) == 0) {
-        cli_print(cli, "keywrap core not found");
-#if 0
-        return CLI_ERROR;
-#endif
+        cli_print(cli, "keywrap core not found, skipping");
     }
     else {
         run_test(cli, K_128, sizeof(K_128), C_128, sizeof(C_128));
@@ -188,8 +185,8 @@ static int cmd_keywrap_test(struct cli_def *cli, const char *command, char *argv
     if (keysize <= 0 || iterations <= 0)
         goto usage;
 
-    uint8_t Q[keysize + 8];
-    uint8_t C[keysize + 8];
+    uint8_t Q[keysize + 8]; size_t Q_len;
+    uint8_t C[keysize + 8]; size_t C_len;
     memset(C, 0, sizeof(C));
     if ((err = hal_get_random(NULL, Q, keysize)) != LIBHAL_OK) {
         cli_print(cli, "hal_get_random: %s", hal_error_string(err));
@@ -203,10 +200,9 @@ static int cmd_keywrap_test(struct cli_def *cli, const char *command, char *argv
         return CLI_ERROR;
     }
 
-    cli_print(cli, "\n3. timing with software keywrap");
+    cli_print(cli, "\n3. wrap timing with software keywrap");
 
     hal_aes_use_keywrap_core(0);
-    size_t C_len = sizeof(C);
     uint32_t start = HAL_GetTick();
     for (int i = 0; i < iterations; ++i) {
         C_len = sizeof(C);
@@ -220,7 +216,7 @@ static int cmd_keywrap_test(struct cli_def *cli, const char *command, char *argv
     cli_print(cli, "%ld.%03lds total, %ld.%03ldms per wrap",
               elapsed / 1000, elapsed % 1000, per / 1000, per % 1000);
 
-    cli_print(cli, "\n4. timing with keywrap core");
+    cli_print(cli, "\n4. wrap timing with keywrap core");
 
     if (hal_aes_use_keywrap_core(1) == 0) {
         cli_print(cli, "keywrap core not found, skipping");
@@ -240,7 +236,41 @@ static int cmd_keywrap_test(struct cli_def *cli, const char *command, char *argv
                   elapsed / 1000, elapsed % 1000, per / 1000, per % 1000);
     }
 
-    /* XXX measure unwrap timing as well */
+    cli_print(cli, "\n5. unwrap timing with software keywrap");
+
+    hal_aes_use_keywrap_core(0);
+    start = HAL_GetTick();
+    for (int i = 0; i < iterations; ++i) {
+        Q_len = sizeof(Q);
+        if ((err = hal_aes_keyunwrap(NULL, kek, kek_len, C, C_len, Q, &Q_len)) != LIBHAL_OK) {
+            cli_print(cli, "hal_aes_keyunwrap: %s", hal_error_string(err));
+            return CLI_ERROR;
+        }
+    }
+    elapsed = HAL_GetTick() - start;
+    per = 1000 * elapsed / iterations;
+    cli_print(cli, "%ld.%03lds total, %ld.%03ldms per wrap",
+              elapsed / 1000, elapsed % 1000, per / 1000, per % 1000);
+
+    cli_print(cli, "\n6. unwrap timing with keywrap core");
+
+    if (hal_aes_use_keywrap_core(1) == 0) {
+        cli_print(cli, "keywrap core not found, skipping");
+    }
+    else {
+        start = HAL_GetTick();
+        for (int i = 0; i < iterations; ++i) {
+            Q_len = sizeof(Q);
+            if ((err = hal_aes_keyunwrap(NULL, kek, kek_len, C, C_len, Q, &Q_len)) != LIBHAL_OK) {
+                cli_print(cli, "hal_aes_keywrap: %s", hal_error_string(err));
+                return CLI_ERROR;
+            }
+        }
+        elapsed = HAL_GetTick() - start;
+        per = 1000 * elapsed / iterations;
+        cli_print(cli, "%ld.%03lds total, %ld.%03ldms per wrap",
+                  elapsed / 1000, elapsed % 1000, per / 1000, per % 1000);
+    }
 
     return CLI_OK;
 }

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