Add cipher abstraction and test cases for OFB block mode
Adds OFB as additional block mode in the cipher abstraction, and additional
test cases for that block mode.
diff --git a/library/cipher_wrap.c b/library/cipher_wrap.c
index a9ef819..ef47037 100644
--- a/library/cipher_wrap.c
+++ b/library/cipher_wrap.c
@@ -142,6 +142,15 @@
}
#endif /* MBEDTLS_CIPHER_MODE_CFB */
+#if defined(MBEDTLS_CIPHER_MODE_OFB)
+static int aes_crypt_ofb_wrap( void *ctx, size_t length, size_t *iv_off,
+ unsigned char *iv, const unsigned char *input, unsigned char *output )
+{
+ return mbedtls_aes_crypt_ofb( (mbedtls_aes_context *) ctx, length, iv_off,
+ iv, input, output );
+}
+#endif /* MBEDTLS_CIPHER_MODE_OFB */
+
#if defined(MBEDTLS_CIPHER_MODE_CTR)
static int aes_crypt_ctr_wrap( void *ctx, size_t length, size_t *nc_off,
unsigned char *nonce_counter, unsigned char *stream_block,
@@ -191,6 +200,9 @@
#if defined(MBEDTLS_CIPHER_MODE_CFB)
aes_crypt_cfb128_wrap,
#endif
+#if defined(MBEDTLS_CIPHER_MODE_OFB)
+ aes_crypt_ofb_wrap,
+#endif
#if defined(MBEDTLS_CIPHER_MODE_CTR)
aes_crypt_ctr_wrap,
#endif
@@ -306,6 +318,41 @@
};
#endif /* MBEDTLS_CIPHER_MODE_CFB */
+#if defined(MBEDTLS_CIPHER_MODE_OFB)
+static const mbedtls_cipher_info_t aes_128_ofb_info = {
+ MBEDTLS_CIPHER_AES_128_OFB,
+ MBEDTLS_MODE_OFB,
+ 128,
+ "AES-128-OFB",
+ 16,
+ 0,
+ 16,
+ &aes_info
+};
+
+static const mbedtls_cipher_info_t aes_192_ofb_info = {
+ MBEDTLS_CIPHER_AES_192_OFB,
+ MBEDTLS_MODE_OFB,
+ 192,
+ "AES-192-OFB",
+ 16,
+ 0,
+ 16,
+ &aes_info
+};
+
+static const mbedtls_cipher_info_t aes_256_ofb_info = {
+ MBEDTLS_CIPHER_AES_256_OFB,
+ MBEDTLS_MODE_OFB,
+ 256,
+ "AES-256-OFB",
+ 16,
+ 0,
+ 16,
+ &aes_info
+};
+#endif /* MBEDTLS_CIPHER_MODE_OFB */
+
#if defined(MBEDTLS_CIPHER_MODE_CTR)
static const mbedtls_cipher_info_t aes_128_ctr_info = {
MBEDTLS_CIPHER_AES_128_CTR,
@@ -358,6 +405,9 @@
#if defined(MBEDTLS_CIPHER_MODE_CFB)
NULL,
#endif
+#if defined(MBEDTLS_CIPHER_MODE_OFB)
+ NULL,
+#endif
#if defined(MBEDTLS_CIPHER_MODE_CTR)
NULL,
#endif
@@ -421,6 +471,9 @@
#if defined(MBEDTLS_CIPHER_MODE_CFB)
NULL,
#endif
+#if defined(MBEDTLS_CIPHER_MODE_OFB)
+ NULL,
+#endif
#if defined(MBEDTLS_CIPHER_MODE_CTR)
NULL,
#endif
@@ -548,6 +601,9 @@
#if defined(MBEDTLS_CIPHER_MODE_CFB)
camellia_crypt_cfb128_wrap,
#endif
+#if defined(MBEDTLS_CIPHER_MODE_OFB)
+ NULL,
+#endif
#if defined(MBEDTLS_CIPHER_MODE_CTR)
camellia_crypt_ctr_wrap,
#endif
@@ -715,6 +771,9 @@
#if defined(MBEDTLS_CIPHER_MODE_CFB)
NULL,
#endif
+#if defined(MBEDTLS_CIPHER_MODE_OFB)
+ NULL,
+#endif
#if defined(MBEDTLS_CIPHER_MODE_CTR)
NULL,
#endif
@@ -778,6 +837,9 @@
#if defined(MBEDTLS_CIPHER_MODE_CFB)
NULL,
#endif
+#if defined(MBEDTLS_CIPHER_MODE_OFB)
+ NULL,
+#endif
#if defined(MBEDTLS_CIPHER_MODE_CTR)
NULL,
#endif
@@ -1312,6 +1374,9 @@
#if defined(MBEDTLS_CIPHER_MODE_CFB)
NULL,
#endif
+#if defined(MBEDTLS_CIPHER_MODE_OFB)
+ NULL,
+#endif
#if defined(MBEDTLS_CIPHER_MODE_CTR)
NULL,
#endif
@@ -1357,6 +1422,9 @@
#if defined(MBEDTLS_CIPHER_MODE_CFB)
NULL,
#endif
+#if defined(MBEDTLS_CIPHER_MODE_OFB)
+ NULL,
+#endif
#if defined(MBEDTLS_CIPHER_MODE_CTR)
NULL,
#endif
@@ -1402,6 +1470,9 @@
#if defined(MBEDTLS_CIPHER_MODE_CFB)
NULL,
#endif
+#if defined(MBEDTLS_CIPHER_MODE_OFB)
+ NULL,
+#endif
#if defined(MBEDTLS_CIPHER_MODE_CTR)
NULL,
#endif
@@ -1511,6 +1582,9 @@
#if defined(MBEDTLS_CIPHER_MODE_CFB)
blowfish_crypt_cfb64_wrap,
#endif
+#if defined(MBEDTLS_CIPHER_MODE_OFB)
+ NULL,
+#endif
#if defined(MBEDTLS_CIPHER_MODE_CTR)
blowfish_crypt_ctr_wrap,
#endif
@@ -1621,6 +1695,9 @@
#if defined(MBEDTLS_CIPHER_MODE_CFB)
NULL,
#endif
+#if defined(MBEDTLS_CIPHER_MODE_OFB)
+ NULL,
+#endif
#if defined(MBEDTLS_CIPHER_MODE_CTR)
NULL,
#endif
@@ -1724,6 +1801,11 @@
{ MBEDTLS_CIPHER_AES_192_CFB128, &aes_192_cfb128_info },
{ MBEDTLS_CIPHER_AES_256_CFB128, &aes_256_cfb128_info },
#endif
+#if defined(MBEDTLS_CIPHER_MODE_OFB)
+ { MBEDTLS_CIPHER_AES_128_OFB, &aes_128_ofb_info },
+ { MBEDTLS_CIPHER_AES_192_OFB, &aes_192_ofb_info },
+ { MBEDTLS_CIPHER_AES_256_OFB, &aes_256_ofb_info },
+#endif
#if defined(MBEDTLS_CIPHER_MODE_CTR)
{ MBEDTLS_CIPHER_AES_128_CTR, &aes_128_ctr_info },
{ MBEDTLS_CIPHER_AES_192_CTR, &aes_192_ctr_info },