crypto: Remove condition of block size

Unnecessary, because the underlying crypto libraries handles this case.
Also:
  - Relax the condition of binary Key and IV

  -Fix bug for empty data on historic cryptolibs because tests fails for
   empty data on at least aes_cfb8 on OpenSSL 0.9.8h. It does not fail
   on OpenSSL 0.9.8zh.

2 files changed, 13 insertions, 10 deletions

diff --git a/lib/crypto/c_src/api_ng.c b/lib/crypto/c_src/api_ng.c
index c4114d1626..f24aded748 100644
--- a/lib/crypto/c_src/api_ng.c
+++ b/lib/crypto/c_src/api_ng.c
@@ -165,8 +165,6 @@ ERL_NIF_TERM ng_crypto_update(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[
     ASSERT(in_data_bin.size =< INT_MAX);
 
     block_size = EVP_CIPHER_CTX_block_size(ctx->ctx);
-    if (in_data_bin.size % (size_t)block_size != 0)
-        return ERROR_Str(env, "Data not a multiple of block size");
 
     if (argc==3) {
         if (!enif_inspect_iolist_as_binary(env, argv[2], &ivec_bin))
diff --git a/lib/crypto/src/crypto.erl b/lib/crypto/src/crypto.erl
index 97a4a7a3f0..8d6d24210a 100644
--- a/lib/crypto/src/crypto.erl
+++ b/lib/crypto/src/crypto.erl
@@ -2252,15 +2252,15 @@ check_otp_test_engine(LibDir) ->
                                                                     | block_cipher_with_iv()
                                                                     | block_cipher_without_iv() ,
                                                             Key :: iodata(),
-                                                            IV :: binary(),
+                                                            IV :: iodata(),
                                                             EncryptFlag :: boolean() | undefined,
                                                             State :: crypto_state() .
 
-crypto_init(Cipher, Key, IV, EncryptFlag) when is_atom(Cipher),
-                                               is_binary(Key),
-                                               is_binary(IV),
-                                               is_atom(EncryptFlag) ->
-    case ng_crypto_init_nif(alias(Cipher), Key, IV, EncryptFlag) of
+crypto_init(Cipher, Key, IV, EncryptFlag) ->
+    case ng_crypto_init_nif(alias(Cipher), 
+                            iolist_to_binary(Key),
+                            iolist_to_binary(IV),
+                            EncryptFlag) of
         {error,Error} ->
             {error,Error};
         undefined -> % For compatibility function crypto_stream_init/3
@@ -2284,8 +2284,13 @@ crypto_init(Cipher, Key, IV, EncryptFlag) when is_atom(Cipher),
                                         when State :: crypto_state(),
                                              Data :: iodata(),
                                              Result :: binary() | {crypto_state(),binary()}.
-crypto_update(State, Data) ->
-    mk_ret(ng_crypto_update_nif(State, Data)).
+crypto_update(State, Data0) ->
+    case iolist_to_binary(Data0) of
+        <<>> ->
+            <<>>;                           % Known to fail on OpenSSL 0.9.8h
+        Data ->
+            mk_ret(ng_crypto_update_nif(State, Data))
+    end.
 
 %%%----------------------------------------------------------------
 %%%