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authorNiclas Eklund <[email protected]>2011-04-15 15:49:42 +0200
committerNiclas Eklund <[email protected]>2011-04-15 15:49:42 +0200
commitf505644be64cd4844742b361a8ff411d70f4aa88 (patch)
treef0b198ec6b9dbb0fdbc211f5ea06f9791ca04bc1 /lib/crypto/test
parentfb1eab890f6776419b3999285dff45802658e8f0 (diff)
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Adds NIFs for cryptographically strong random number generation.
Also adds documentation and unit tests. Thanks to Geoff Cant.
Diffstat (limited to 'lib/crypto/test')
-rw-r--r--lib/crypto/test/crypto_SUITE.erl31
1 files changed, 30 insertions, 1 deletions
diff --git a/lib/crypto/test/crypto_SUITE.erl b/lib/crypto/test/crypto_SUITE.erl
index fe8f8e69a0..1946d01489 100644
--- a/lib/crypto/test/crypto_SUITE.erl
+++ b/lib/crypto/test/crypto_SUITE.erl
@@ -46,6 +46,7 @@
aes_ctr/1,
mod_exp_test/1,
rand_uniform_test/1,
+ strong_rand_uniform_test/1,
rsa_verify_test/1,
dsa_verify_test/1,
rsa_sign_test/1,
@@ -68,7 +69,8 @@ all() ->
md5_mac_io, sha, sha_update,
%% sha256, sha256_update, sha512,sha512_update,
des_cbc, aes_cfb, aes_cbc,
- aes_cbc_iter, aes_ctr, des_cbc_iter, des_ecb, rand_uniform_test,
+ aes_cbc_iter, aes_ctr, des_cbc_iter, des_ecb,
+ rand_uniform_test, strong_rand_uniform_test,
rsa_verify_test, dsa_verify_test, rsa_sign_test,
dsa_sign_test, rsa_encrypt_decrypt, dh, exor_test,
rc4_test, rc4_stream_test, mod_exp_test, blowfish_cfb64,
@@ -710,6 +712,33 @@ rand_uniform_aux_test(N) ->
%%
%%
+strong_rand_uniform_test(doc) ->
+ "strong_rand_uniform and strong_random_bytes testing";
+strong_rand_uniform_test(suite) ->
+ [];
+strong_rand_uniform_test(Config) when is_list(Config) ->
+ strong_rand_uniform_aux_test(180),
+ ?line 10 = byte_size(crypto:strong_rand_bytes(10)).
+
+strong_rand_uniform_aux_test(0) ->
+ ?line t(crypto:strong_rand_uniform(0,0,0) =:= <<0,0,0,0>>),
+ ok;
+strong_rand_uniform_aux_test(1) ->
+ ?line t(crypto:erlint(crypto:strong_rand_uniform(1,0,1)) =:= 1),
+ ?line rand_uniform_aux_test(0);
+strong_rand_uniform_aux_test(N) ->
+ ?line t(sru_length(crypto:strong_rand_uniform(N,-1,0)) =< N),
+ ?line t(sru_length(crypto:strong_rand_uniform(N,0,0)) =:= N),
+ ?line t(crypto:erlint(crypto:strong_rand_uniform(N,0,1)) band 1 =:= 1),
+ ?line t(crypto:erlint(crypto:strong_rand_uniform(N,1,0)) bsr (N - 2) =:= 2#11),
+ ?line rand_uniform_aux_test(N-1).
+
+sru_length(Mpint) ->
+ I = crypto:erlint(Mpint),
+ length(erlang:integer_to_list(I, 2)).
+
+%%
+%%
%%
%%
rsa_verify_test(doc) ->