From d61ae2d8880ec73149347aea73d49d39ff5f5ec2 Mon Sep 17 00:00:00 2001
From: Nikos Mavrogiannopoulos <nmav@gnutls.org>
Date: Sat, 5 Feb 2011 23:47:11 +0100
Subject: [PATCH] (test_cipher_gcm): New function, contributed by Nikos
Mavrogiannopoulos.
Rev: nettle/testsuite/testutils.c:1.12
Rev: nettle/testsuite/testutils.h:1.6
---
testsuite/testutils.c | 66 +++++++++++++++++++++++++++++++++++++++++++
testsuite/testutils.h | 13 +++++++++
2 files changed, 79 insertions(+)
diff --git a/testsuite/testutils.c b/testsuite/testutils.c
index a0b3924b..3228cb73 100644
--- a/testsuite/testutils.c
+++ b/testsuite/testutils.c
@@ -4,6 +4,7 @@
#include "cbc.h"
#include "ctr.h"
+#include "gcm.h"
#include "knuth-lfib.h"
#include <ctype.h>
@@ -295,6 +296,71 @@ test_cipher_ctr(const struct nettle_cipher *cipher,
free(ctr);
}
+void
+test_cipher_gcm(const struct nettle_cipher *cipher,
+ unsigned key_length,
+ const uint8_t *key,
+ unsigned auth_length,
+ const uint8_t *authtext,
+ unsigned length,
+ const uint8_t *cleartext,
+ const uint8_t *ciphertext,
+ unsigned iv_length,
+ const uint8_t *iv,
+ const uint8_t *digest)
+{
+ struct gcm_ctx gctx;
+ void *cipher_ctx = xalloc(cipher->context_size);
+ uint8_t *data = xalloc(length);
+ uint8_t buffer[GCM_BLOCK_SIZE];
+
+ /* encryption */
+ memset(buffer, 0, sizeof(buffer));
+ cipher->set_encrypt_key(cipher_ctx, key_length, key);
+
+ gcm_set_key(&gctx, cipher_ctx, cipher->encrypt);
+ gcm_set_iv(&gctx, iv_length, iv);
+
+ if (auth_length)
+ gcm_auth(&gctx, auth_length, authtext);
+
+ if (length)
+ gcm_encrypt(&gctx, cipher_ctx, cipher->encrypt,
+ length, data, cleartext);
+
+ gcm_digest(&gctx, cipher_ctx, cipher->encrypt,
+ GCM_BLOCK_SIZE, buffer);
+
+ if (!MEMEQ(length, data, ciphertext))
+ FAIL();
+
+ if (!MEMEQ(GCM_BLOCK_SIZE, buffer, digest))
+ FAIL();
+
+ /* decryption */
+ memset(buffer, 0, sizeof(buffer));
+ gcm_set_iv(&gctx, iv_length, iv);
+
+ if (auth_length)
+ gcm_auth(&gctx, auth_length, authtext);
+
+ if (length)
+ gcm_decrypt(&gctx, cipher_ctx, cipher->encrypt,
+ length, data, data);
+
+ gcm_digest(&gctx, cipher_ctx, cipher->encrypt,
+ GCM_BLOCK_SIZE, buffer);
+
+ if (!MEMEQ(length, data, cleartext))
+ FAIL();
+
+ if (!MEMEQ(GCM_BLOCK_SIZE, buffer, digest))
+ FAIL();
+
+ free(cipher_ctx);
+ free(data);
+}
+
void
test_cipher_stream(const struct nettle_cipher *cipher,
unsigned key_length,
diff --git a/testsuite/testutils.h b/testsuite/testutils.h
index 91ec4962..bbfa468d 100644
--- a/testsuite/testutils.h
+++ b/testsuite/testutils.h
@@ -105,6 +105,19 @@ test_cipher_ctr(const struct nettle_cipher *cipher,
const uint8_t *ciphertext,
const uint8_t *iv);
+void
+test_cipher_gcm(const struct nettle_cipher *cipher,
+ unsigned key_length,
+ const uint8_t *key,
+ unsigned auth_length,
+ const uint8_t *authtext,
+ unsigned length,
+ const uint8_t *cleartext,
+ const uint8_t *ciphertext,
+ unsigned iv_length,
+ const uint8_t *iv,
+ const uint8_t *digest);
+
void
test_cipher_stream(const struct nettle_cipher *cipher,
unsigned key_length,
--
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