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authorDominik Riebeling <Dominik.Riebeling@gmail.com>2020-08-08 18:45:07 +0200
committerDominik Riebeling <Dominik.Riebeling@gmail.com>2020-10-18 19:08:32 +0200
commitcaa9d9c1c5cc4347edca0c9a9868fdd105b5e779 (patch)
tree403787a018da9eced31d1f84b6493e59466dddc7 /utils/tomcrypt/src/modes/cbc/cbc_start.c
parent7603533f7fc9f7aec7c04a1258cf772247170e90 (diff)
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utils: Add (partial) libtomcrypt.
Add the parts of libtomcrypt that we're about to use. Change-Id: I0adc1d7d1f4833e7bb3ed53b9a4d9a85977cfb8b
Diffstat (limited to 'utils/tomcrypt/src/modes/cbc/cbc_start.c')
-rw-r--r--utils/tomcrypt/src/modes/cbc/cbc_start.c60
1 files changed, 60 insertions, 0 deletions
diff --git a/utils/tomcrypt/src/modes/cbc/cbc_start.c b/utils/tomcrypt/src/modes/cbc/cbc_start.c
new file mode 100644
index 0000000000..08483e2b8f
--- /dev/null
+++ b/utils/tomcrypt/src/modes/cbc/cbc_start.c
@@ -0,0 +1,60 @@
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis
+ *
+ * LibTomCrypt is a library that provides various cryptographic
+ * algorithms in a highly modular and flexible manner.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ */
+#include "tomcrypt.h"
+
+/**
+ @file cbc_start.c
+ CBC implementation, start chain, Tom St Denis
+*/
+
+#ifdef LTC_CBC_MODE
+
+/**
+ Initialize a CBC context
+ @param cipher The index of the cipher desired
+ @param IV The initialization vector
+ @param key The secret key
+ @param keylen The length of the secret key (octets)
+ @param num_rounds Number of rounds in the cipher desired (0 for default)
+ @param cbc The CBC state to initialize
+ @return CRYPT_OK if successful
+*/
+int cbc_start(int cipher, const unsigned char *IV, const unsigned char *key,
+ int keylen, int num_rounds, symmetric_CBC *cbc)
+{
+ int x, err;
+
+ LTC_ARGCHK(IV != NULL);
+ LTC_ARGCHK(key != NULL);
+ LTC_ARGCHK(cbc != NULL);
+
+ /* bad param? */
+ if ((err = cipher_is_valid(cipher)) != CRYPT_OK) {
+ return err;
+ }
+
+ /* setup cipher */
+ if ((err = cipher_descriptor[cipher].setup(key, keylen, num_rounds, &cbc->key)) != CRYPT_OK) {
+ return err;
+ }
+
+ /* copy IV */
+ cbc->blocklen = cipher_descriptor[cipher].block_length;
+ cbc->cipher = cipher;
+ for (x = 0; x < cbc->blocklen; x++) {
+ cbc->IV[x] = IV[x];
+ }
+ return CRYPT_OK;
+}
+
+#endif
+
+/* ref: HEAD -> master, tag: v1.18.2 */
+/* git commit: 7e7eb695d581782f04b24dc444cbfde86af59853 */
+/* commit time: 2018-07-01 22:49:01 +0200 */