--- /dev/null
+/* 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 ecb_decrypt.c
+ ECB implementation, decrypt a block, Tom St Denis
+*/
+
+#ifdef LTC_ECB_MODE
+
+/**
+ ECB decrypt
+ @param ct Ciphertext
+ @param pt [out] Plaintext
+ @param len The number of octets to process (must be multiple of the cipher block size)
+ @param ecb ECB state
+ @return CRYPT_OK if successful
+*/
+int ecb_decrypt(const unsigned char *ct, unsigned char *pt, unsigned long len, symmetric_ECB *ecb)
+{
+ int err;
+ LTC_ARGCHK(pt != NULL);
+ LTC_ARGCHK(ct != NULL);
+ LTC_ARGCHK(ecb != NULL);
+ if ((err = cipher_is_valid(ecb->cipher)) != CRYPT_OK) {
+ return err;
+ }
+ if (len % cipher_descriptor[ecb->cipher].block_length) {
+ return CRYPT_INVALID_ARG;
+ }
+
+ /* check for accel */
+ if (cipher_descriptor[ecb->cipher].accel_ecb_decrypt != NULL) {
+ return cipher_descriptor[ecb->cipher].accel_ecb_decrypt(ct, pt, len / cipher_descriptor[ecb->cipher].block_length, &ecb->key);
+ } else {
+ while (len) {
+ if ((err = cipher_descriptor[ecb->cipher].ecb_decrypt(ct, pt, &ecb->key)) != CRYPT_OK) {
+ return err;
+ }
+ pt += cipher_descriptor[ecb->cipher].block_length;
+ ct += cipher_descriptor[ecb->cipher].block_length;
+ len -= cipher_descriptor[ecb->cipher].block_length;
+ }
+ }
+ return CRYPT_OK;
+}
+
+#endif
+
+/* ref: $Format:%D$ */
+/* git commit: $Format:%H$ */
+/* commit time: $Format:%ai$ */