=item EVP_CIPHER_CTX_dup()
Can be used to duplicate the cipher state from I<in>. This is useful
-to avoid multiple EVP_MD_fetch() calls or if large amounts of data are to be
-hashed which only differ in the last few bytes.
+to avoid multiple EVP_CIPHER_fetch() calls or if large amounts of data are to be
+fed which only differ in the last few bytes.
=item EVP_CIPHER_CTX_copy()
EVP_CIPHER_CTX_new() returns a pointer to a newly created
B<EVP_CIPHER_CTX> for success and B<NULL> for failure.
-EVP_CIPHER_CTX_dup() returns a new EVP_MD_CTX if successful or NULL on failure.
+EVP_CIPHER_CTX_dup() returns a new EVP_CIPHER_CTX if successful or NULL on failure.
EVP_CIPHER_CTX_copy() returns 1 if successful or 0 for failure.