1 files changed, 36 insertions, 0 deletions
diff --git a/src/include/openssl/cipher.h b/src/include/openssl/cipher.h
index 0dfd97b1..b6143331 100644
--- a/src/include/openssl/cipher.h
+++ b/src/include/openssl/cipher.h
@@ -484,6 +484,42 @@ typedef struct evp_cipher_info_st {
   unsigned char iv[EVP_MAX_IV_LENGTH];
 } EVP_CIPHER_INFO;
 
+struct evp_cipher_st {
+  /* type contains a NID identifing the cipher. (For example, NID_rc4.) */
+  int nid;
+
+  /* block_size contains the block size, in bytes, of the cipher, or 1 for a
+   * stream cipher. */
+  unsigned block_size;
+
+  /* key_len contains the key size, in bytes, for the cipher. If the cipher
+   * takes a variable key size then this contains the default size. */
+  unsigned key_len;
+
+  /* iv_len contains the IV size, in bytes, or zero if inapplicable. */
+  unsigned iv_len;
+
+  /* ctx_size contains the size, in bytes, of the per-key context for this
+   * cipher. */
+  unsigned ctx_size;
+
+  /* flags contains the OR of a number of flags. See |EVP_CIPH_*|. */
+  uint32_t flags;
+
+  /* app_data is a pointer to opaque, user data. */
+  void *app_data;
+
+  int (*init)(EVP_CIPHER_CTX *ctx, const uint8_t *key, const uint8_t *iv,
+              int enc);
+
+  int (*cipher)(EVP_CIPHER_CTX *ctx, uint8_t *out, const uint8_t *in,
+                size_t inl);
+
+  int (*cleanup)(EVP_CIPHER_CTX *);
+
+  int (*ctrl)(EVP_CIPHER_CTX *, int type, int arg, void *ptr);
+};
+
 
 /* Android compatibility section.
  *