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| author | Raimo Niskanen <[email protected]> | 2017-09-06 21:56:22 +0200 |
|---|---|---|
| committer | Raimo Niskanen <[email protected]> | 2017-09-06 22:07:37 +0200 |
| commit | 2181428bcad2abb3265e796e0b84b10830c74a76 (patch) | |
| tree | d6c6f2dd68784c9e18e71e3ce4c1cc76aec28ee3 /lib/crypto | |
| parent | 040bdce67f88d833bfb59adae130a4ffb4c180f0 (diff) | |
| download | otp-2181428bcad2abb3265e796e0b84b10830c74a76.tar.gz otp-2181428bcad2abb3265e796e0b84b10830c74a76.tar.bz2 otp-2181428bcad2abb3265e796e0b84b10830c74a76.zip | |
Implement crypto rand cache
Diffstat (limited to 'lib/crypto')
| -rw-r--r-- | lib/crypto/src/crypto.erl | 28 |
1 files changed, 24 insertions, 4 deletions
diff --git a/lib/crypto/src/crypto.erl b/lib/crypto/src/crypto.erl index d111525214..69c98c651f 100644 --- a/lib/crypto/src/crypto.erl +++ b/lib/crypto/src/crypto.erl @@ -30,11 +30,12 @@ -export([hmac/3, hmac/4, hmac_init/2, hmac_update/2, hmac_final/1, hmac_final_n/2]). -export([cmac/3, cmac/4]). -export([exor/2, strong_rand_bytes/1, mod_pow/3]). --export([rand_seed/0]). --export([rand_seed_s/0]). +-export([rand_seed/0, rand_seed_alg/1]). +-export([rand_seed_s/0, rand_seed_alg_s/1]). -export([rand_plugin_next/1]). -export([rand_plugin_uniform/1]). -export([rand_plugin_uniform/2]). +-export([rand_cache_plugin_next/1]). -export([rand_uniform/2]). -export([block_encrypt/3, block_decrypt/3, block_encrypt/4, block_decrypt/4]). -export([next_iv/2, next_iv/3]). @@ -299,6 +300,8 @@ stream_decrypt(State, Data0) -> -spec strong_rand_bytes(non_neg_integer()) -> binary(). -spec rand_seed() -> rand:state(). -spec rand_seed_s() -> rand:state(). +-spec rand_seed_alg(Alg :: atom()) -> rand:state(). +-spec rand_seed_alg_s(Alg :: atom()) -> rand:state(). -spec rand_uniform(crypto_integer(), crypto_integer()) -> crypto_integer(). @@ -314,12 +317,24 @@ rand_seed() -> rand:seed(rand_seed_s()). rand_seed_s() -> + rand_seed_alg_s(?MODULE). + +rand_seed_alg(Alg) -> + rand:seed(rand_seed_alg_s(Alg)). + +-define(CRYPTO_CACHE_BITS, 56). +rand_seed_alg_s(?MODULE) -> {#{ type => ?MODULE, bits => 64, next => fun ?MODULE:rand_plugin_next/1, uniform => fun ?MODULE:rand_plugin_uniform/1, uniform_n => fun ?MODULE:rand_plugin_uniform/2}, - no_seed}. + no_seed}; +rand_seed_alg_s(crypto_cache) -> + {#{ type => crypto_cache, + bits => ?CRYPTO_CACHE_BITS, + next => fun ?MODULE:rand_cache_plugin_next/1}, + <<>>}. rand_plugin_next(Seed) -> {bytes_to_integer(strong_rand_range(1 bsl 64)), Seed}. @@ -330,6 +345,11 @@ rand_plugin_uniform(State) -> rand_plugin_uniform(Max, State) -> {bytes_to_integer(strong_rand_range(Max)) + 1, State}. +rand_cache_plugin_next(<<>>) -> + rand_cache_plugin_next( + strong_rand_bytes(?CRYPTO_CACHE_BITS * 16)); % Cache 16 * 8 words +rand_cache_plugin_next(<<I:?CRYPTO_CACHE_BITS,Cache/binary>>) -> + {I, Cache}. strong_rand_range(Range) when is_integer(Range), Range > 0 -> BinRange = int_to_bin(Range), @@ -377,7 +397,7 @@ rand_uniform_nif(_From,_To) -> ?nif_stub. -spec rand_seed(binary()) -> ok. -rand_seed(Seed) -> +rand_seed(Seed) when is_binary(Seed) -> rand_seed_nif(Seed). rand_seed_nif(_Seed) -> ?nif_stub. |