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crypto のメモ

Posted at

R16 で deprecated だった crypto:sha_* 等が削除、どうしよう、という件。

preprocessor は ifdef/ifndef なので、

#
 ERLANG_HOME ?= /opt/erlang/release/latest

 ERLANG_VER = $(shell $(ERLANG_HOME)/bin/erl -noshell -eval 'io:format("~s",[erlang:system_info(otp_release)]), halt()')

#
 REBAR_BIN  = rebar

 REBAR_ENV  =
 REBAR_ENV += PATH=$(ERLANG_HOME)/bin:$(PATH)

 REBAR_OPT  =
 REBAR_OPT += $(shell test $(ERLANG_VER) \< R16 && echo -DUSE_CRYPTO_DEPRECATED)

#
compile:
        @$(REBAR_ENV) $(REBAR_BIN) $(REBAR_OPT) $@
-ifndef(USE_CRYPTO_DEPRECATED).
hash(Binary, Type) ->
    L = [
         Binary
        ],
    F = fun(E,A) -> crypto:hash_update(A,E) end,
    crypto:hash_final(lists:foldl(F,crypto:hash_init(Type),L)).
-else.
hash(Binary, sha) ->
    L = [
         Binary
        ],
    F = fun(E,A) -> crypto:sha_update(A,E) end,
    crypto:sha_final(lists:foldl(F,crypto:sha_init(),L)).
-endif.

とか。

よく見たら、R15B03-1 には crypto:hash_init/1 はありましたね。。

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