Android can possibly support arc4random API.

randombit · Mar 7, 2019 · 1da939d · 1da939d
1 parent 9252df3
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Showing 2 changed files with 4 additions and 1 deletion.
diff --git a/doc/os.rst b/doc/os.rst
@@ -34,7 +34,7 @@ A summary of OS features as defined in ``src/build-data/os``.
 .. csv-table::
    :header: "Feature", "a", "a", "c", "d", "d", "e", "f", "h", "h", "h", "i", "i", "l", "l", "m", "n", "n", "o", "q", "s", "u", "w"
 
-   "arc4random", " ", " ", " ", "X", "X", " ", "X", " ", " ", " ", " ", "X", " ", " ", " ", " ", "X", "X", " ", " ", " ", " "
+   "arc4random", " ", "X", " ", "X", "X", " ", "X", " ", " ", " ", " ", "X", " ", " ", " ", " ", "X", "X", " ", " ", " ", " "
    "cap_enter", " ", " ", " ", " ", " ", " ", "X", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " "
    "clock_gettime", "X", "X", " ", " ", "X", " ", "X", "X", "X", "X", " ", " ", "X", " ", " ", " ", "X", "X", "X", "X", " ", " "
    "commoncrypto", " ", " ", " ", "X", " ", " ", " ", " ", " ", " ", " ", "X", " ", " ", " ", " ", " ", " ", " ", " ", " ", " "

diff --git a/src/build-data/os/android.txt b/src/build-data/os/android.txt
@@ -6,6 +6,9 @@ posix1
 posix_mlock
 clock_gettime
 
+# arc4random_buf preferably backed-up by Chacha20 rather
+# than RC4. can possibly be disabled by --without-os-feature=arc4random
+arc4random
 dev_random
 
 # getauxval is available in Android NDK for min API 18 and in Crystax NDK