A couple of things were reversed for BN_pseudo_rand ...

crypto/bn/bn_rand.c

@@ -127,10 +127,10 @@ err:
 
 int     BN_rand(BIGNUM *rnd, int bits, int top, int bottom)
 	{
-	return bnrand(1, rnd, bits, top, bottom);
+	return bnrand(0, rnd, bits, top, bottom);
 	}
 
 int     BN_pseudo_rand(BIGNUM *rnd, int bits, int top, int bottom)
 	{
-	return bnrand(0, rnd, bits, top, bottom);
+	return bnrand(1, rnd, bits, top, bottom);
 	}

doc/crypto/BN_rand.pod

@@ -2,7 +2,7 @@
 
 =head1 NAME
 
-BN_rand, BN_rand_pseudo - Generate pseudo-random number
+BN_rand, BN_pseudo_rand - Generate pseudo-random number
 
 =head1 SYNOPSIS