#14371: Add opensll to main repository
diff --git a/jni/openssl/crypto/bn/divtest.c b/jni/openssl/crypto/bn/divtest.c
new file mode 100644
index 0000000..d3fc688
--- /dev/null
+++ b/jni/openssl/crypto/bn/divtest.c
@@ -0,0 +1,41 @@
+#include <openssl/bn.h>
+#include <openssl/rand.h>
+
+static int Rand(n)
+{
+ unsigned char x[2];
+ RAND_pseudo_bytes(x,2);
+ return (x[0] + 2*x[1]);
+}
+
+static void bug(char *m, BIGNUM *a, BIGNUM *b)
+{
+ printf("%s!\na=",m);
+ BN_print_fp(stdout, a);
+ printf("\nb=");
+ BN_print_fp(stdout, b);
+ printf("\n");
+ fflush(stdout);
+}
+
+main()
+{
+ BIGNUM *a=BN_new(), *b=BN_new(), *c=BN_new(), *d=BN_new(),
+ *C=BN_new(), *D=BN_new();
+ BN_RECP_CTX *recp=BN_RECP_CTX_new();
+ BN_CTX *ctx=BN_CTX_new();
+
+ for(;;) {
+ BN_pseudo_rand(a,Rand(),0,0);
+ BN_pseudo_rand(b,Rand(),0,0);
+ if (BN_is_zero(b)) continue;
+
+ BN_RECP_CTX_set(recp,b,ctx);
+ if (BN_div(C,D,a,b,ctx) != 1)
+ bug("BN_div failed",a,b);
+ if (BN_div_recp(c,d,a,recp,ctx) != 1)
+ bug("BN_div_recp failed",a,b);
+ else if (BN_cmp(c,C) != 0 || BN_cmp(c,C) != 0)
+ bug("mismatch",a,b);
+ }
+}