libavutil: Added cbc mode to cast128

Signed-off-by: Supraja Meedinti <supraja0493@gmail.com>
Previous version reviewed-by: Giorgio Vazzana <mywing81@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

1 files changed, 13 insertions, 1 deletions

diff --git a/libavutil/cast5.h b/libavutil/cast5.h
index 913d048874..e5cc8b1102 100644
--- a/libavutil/cast5.h
+++ b/libavutil/cast5.h
@@ -52,7 +52,7 @@ struct AVCAST5 *av_cast5_alloc(void);
 int av_cast5_init(struct AVCAST5 *ctx, const uint8_t *key, int key_bits);
 
 /**
-  * Encrypt or decrypt a buffer using a previously initialized context
+  * Encrypt or decrypt a buffer using a previously initialized context, ECB mode only
   *
   * @param ctx an AVCAST5 context
   * @param dst destination array, can be equal to src
@@ -61,6 +61,18 @@ int av_cast5_init(struct AVCAST5 *ctx, const uint8_t *key, int key_bits);
   * @param decrypt 0 for encryption, 1 for decryption
  */
 void av_cast5_crypt(struct AVCAST5 *ctx, uint8_t *dst, const uint8_t *src, int count, int decrypt);
+
+/**
+  * Encrypt or decrypt a buffer using a previously initialized context
+  *
+  * @param ctx an AVCAST5 context
+  * @param dst destination array, can be equal to src
+  * @param src source array, can be equal to dst
+  * @param count number of 8 byte blocks
+  * @param iv initialization vector for CBC mode, NULL for ECB mode
+  * @param decrypt 0 for encryption, 1 for decryption
+ */
+void av_cast5_crypt2(struct AVCAST5 *ctx, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt);
 /**
  * @}
  */