diff --git a/test_check.c b/test_check.c
index 839195745b..f86b69f0d1 100644
--- a/test_check.c
+++ b/test_check.c
@@ -57,6 +57,7 @@
 #include "script.h"
 #include "rfc6979.h"
 #include "address.h"
+#include "rc4.h"
 
 /*
  * This is a clever trick to make Valgrind's Memcheck verify code
@@ -3281,6 +3282,217 @@ START_TEST(test_multibyte_address)
 }
 END_TEST
 
+// https://tools.ietf.org/html/rfc6229#section-2
+START_TEST(test_rc4_rfc6229)
+{
+	static const size_t offsets[] = {
+		  0x0,
+		 0xf0,
+		0x1f0,
+		0x2f0,
+		0x3f0,
+		0x5f0,
+		0x7f0,
+		0xbf0,
+		0xff0,
+	};
+
+	static const struct {
+		char key[65];
+		char vectors[sizeof(offsets) / sizeof(*offsets)][65];
+	} tests[] = {
+		{
+			"0102030405",
+			{
+				"b2396305f03dc027ccc3524a0a1118a8" "6982944f18fc82d589c403a47a0d0919",
+				"28cb1132c96ce286421dcaadb8b69eae" "1cfcf62b03eddb641d77dfcf7f8d8c93",
+				"42b7d0cdd918a8a33dd51781c81f4041" "6459844432a7da923cfb3eb4980661f6",
+				"ec10327bde2beefd18f9277680457e22" "eb62638d4f0ba1fe9fca20e05bf8ff2b",
+				"45129048e6a0ed0b56b490338f078da5" "30abbcc7c20b01609f23ee2d5f6bb7df",
+				"3294f744d8f9790507e70f62e5bbceea" "d8729db41882259bee4f825325f5a130",
+				"1eb14a0c13b3bf47fa2a0ba93ad45b8b" "cc582f8ba9f265e2b1be9112e975d2d7",
+				"f2e30f9bd102ecbf75aaade9bc35c43c" "ec0e11c479dc329dc8da7968fe965681",
+				"068326a2118416d21f9d04b2cd1ca050" "ff25b58995996707e51fbdf08b34d875",
+			}
+		}, {
+			"01020304050607",
+			{
+				"293f02d47f37c9b633f2af5285feb46b" "e620f1390d19bd84e2e0fd752031afc1",
+				"914f02531c9218810df60f67e338154c" "d0fdb583073ce85ab83917740ec011d5",
+				"75f81411e871cffa70b90c74c592e454" "0bb87202938dad609e87a5a1b079e5e4",
+				"c2911246b612e7e7b903dfeda1dad866" "32828f91502b6291368de8081de36fc2",
+				"f3b9a7e3b297bf9ad804512f9063eff1" "8ecb67a9ba1f55a5a067e2b026a3676f",
+				"d2aa902bd42d0d7cfd340cd45810529f" "78b272c96e42eab4c60bd914e39d06e3",
+				"f4332fd31a079396ee3cee3f2a4ff049" "05459781d41fda7f30c1be7e1246c623",
+				"adfd3868b8e51485d5e610017e3dd609" "ad26581c0c5be45f4cea01db2f3805d5",
+				"f3172ceffc3b3d997c85ccd5af1a950c" "e74b0b9731227fd37c0ec08a47ddd8b8",
+			}
+		}, {
+			"0102030405060708",
+			{
+				"97ab8a1bf0afb96132f2f67258da15a8" "8263efdb45c4a18684ef87e6b19e5b09",
+				"9636ebc9841926f4f7d1f362bddf6e18" "d0a990ff2c05fef5b90373c9ff4b870a",
+				"73239f1db7f41d80b643c0c52518ec63" "163b319923a6bdb4527c626126703c0f",
+				"49d6c8af0f97144a87df21d91472f966" "44173a103b6616c5d5ad1cee40c863d0",
+				"273c9c4b27f322e4e716ef53a47de7a4" "c6d0e7b226259fa9023490b26167ad1d",
+				"1fe8986713f07c3d9ae1c163ff8cf9d3" "8369e1a965610be887fbd0c79162aafb",
+				"0a0127abb44484b9fbef5abcae1b579f" "c2cdadc6402e8ee866e1f37bdb47e42c",
+				"26b51ea37df8e1d6f76fc3b66a7429b3" "bc7683205d4f443dc1f29dda3315c87b",
+				"d5fa5a3469d29aaaf83d23589db8c85b" "3fb46e2c8f0f068edce8cdcd7dfc5862",
+			}
+		}, {
+			"0102030405060708090a",
+			{
+				"ede3b04643e586cc907dc21851709902" "03516ba78f413beb223aa5d4d2df6711",
+				"3cfd6cb58ee0fdde640176ad0000044d" "48532b21fb6079c9114c0ffd9c04a1ad",
+				"3e8cea98017109979084b1ef92f99d86" "e20fb49bdb337ee48b8d8dc0f4afeffe",
+				"5c2521eacd7966f15e056544bea0d315" "e067a7031931a246a6c3875d2f678acb",
+				"a64f70af88ae56b6f87581c0e23e6b08" "f449031de312814ec6f319291f4a0516",
+				"bdae85924b3cb1d0a2e33a30c6d79599" "8a0feddbac865a09bcd127fb562ed60a",
+				"b55a0a5b51a12a8be34899c3e047511a" "d9a09cea3ce75fe39698070317a71339",
+				"552225ed1177f44584ac8cfa6c4eb5fc" "7e82cbabfc95381b080998442129c2f8",
+				"1f135ed14ce60a91369d2322bef25e3c" "08b6be45124a43e2eb77953f84dc8553",
+			}
+		}, {
+			"0102030405060708090a0b0c0d0e0f10",
+			{
+				"9ac7cc9a609d1ef7b2932899cde41b97" "5248c4959014126a6e8a84f11d1a9e1c",
+				"065902e4b620f6cc36c8589f66432f2b" "d39d566bc6bce3010768151549f3873f",
+				"b6d1e6c4a5e4771cad79538df295fb11" "c68c1d5c559a974123df1dbc52a43b89",
+				"c5ecf88de897fd57fed301701b82a259" "eccbe13de1fcc91c11a0b26c0bc8fa4d",
+				"e7a72574f8782ae26aabcf9ebcd66065" "bdf0324e6083dcc6d3cedd3ca8c53c16",
+				"b40110c4190b5622a96116b0017ed297" "ffa0b514647ec04f6306b892ae661181",
+				"d03d1bc03cd33d70dff9fa5d71963ebd" "8a44126411eaa78bd51e8d87a8879bf5",
+				"fabeb76028ade2d0e48722e46c4615a3" "c05d88abd50357f935a63c59ee537623",
+				"ff38265c1642c1abe8d3c2fe5e572bf8" "a36a4c301ae8ac13610ccbc12256cacc",
+			}
+		}, {
+			"0102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f20",
+			{
+				"eaa6bd25880bf93d3f5d1e4ca2611d91" "cfa45c9f7e714b54bdfa80027cb14380",
+				"114ae344ded71b35f2e60febad727fd8" "02e1e7056b0f623900496422943e97b6",
+				"91cb93c787964e10d9527d999c6f936b" "49b18b42f8e8367cbeb5ef104ba1c7cd",
+				"87084b3ba700bade955610672745b374" "e7a7b9e9ec540d5ff43bdb12792d1b35",
+				"c799b596738f6b018c76c74b1759bd90" "7fec5bfd9f9b89ce6548309092d7e958",
+				"40f250b26d1f096a4afd4c340a588815" "3e34135c79db010200767651cf263073",
+				"f656abccf88dd827027b2ce917d464ec" "18b62503bfbc077fbabb98f20d98ab34",
+				"8aed95ee5b0dcbfbef4eb21d3a3f52f9" "625a1ab00ee39a5327346bddb01a9c18",
+				"a13a7c79c7e119b5ab0296ab28c300b9" "f3e4c0a2e02d1d01f7f0a74618af2b48",
+			}
+		}, {
+			"833222772a",
+			{
+				"80ad97bdc973df8a2e879e92a497efda" "20f060c2f2e5126501d3d4fea10d5fc0",
+				"faa148e99046181fec6b2085f3b20ed9" "f0daf5bab3d596839857846f73fbfe5a",
+				"1c7e2fc4639232fe297584b296996bc8" "3db9b249406cc8edffac55ccd322ba12",
+				"e4f9f7e0066154bbd125b745569bc897" "75d5ef262b44c41a9cf63ae14568e1b9",
+				"6da453dbf81e82334a3d8866cb50a1e3" "7828d074119cab5c22b294d7a9bfa0bb",
+				"adb89cea9a15fbe617295bd04b8ca05c" "6251d87fd4aaae9a7e4ad5c217d3f300",
+				"e7119bd6dd9b22afe8f89585432881e2" "785b60fd7ec4e9fcb6545f350d660fab",
+				"afecc037fdb7b0838eb3d70bcd268382" "dbc1a7b49d57358cc9fa6d61d73b7cf0",
+				"6349d126a37afcba89794f9804914fdc" "bf42c3018c2f7c66bfde524975768115",
+			}
+		}, {
+			"1910833222772a",
+			{
+				"bc9222dbd3274d8fc66d14ccbda6690b" "7ae627410c9a2be693df5bb7485a63e3",
+				"3f0931aa03defb300f060103826f2a64" "beaa9ec8d59bb68129f3027c96361181",
+				"74e04db46d28648d7dee8a0064b06cfe" "9b5e81c62fe023c55be42f87bbf932b8",
+				"ce178fc1826efecbc182f57999a46140" "8bdf55cd55061c06dba6be11de4a578a",
+				"626f5f4dce652501f3087d39c92cc349" "42daac6a8f9ab9a7fd137c6037825682",
+				"cc03fdb79192a207312f53f5d4dc33d9" "f70f14122a1c98a3155d28b8a0a8a41d",
+				"2a3a307ab2708a9c00fe0b42f9c2d6a1" "862617627d2261eab0b1246597ca0ae9",
+				"55f877ce4f2e1ddbbf8e13e2cde0fdc8" "1b1556cb935f173337705fbb5d501fc1",
+				"ecd0e96602be7f8d5092816cccf2c2e9" "027881fab4993a1c262024a94fff3f61",
+			}
+		}, {
+			"641910833222772a",
+			{
+				"bbf609de9413172d07660cb680716926" "46101a6dab43115d6c522b4fe93604a9",
+				"cbe1fff21c96f3eef61e8fe0542cbdf0" "347938bffa4009c512cfb4034b0dd1a7",
+				"7867a786d00a7147904d76ddf1e520e3" "8d3e9e1caefcccb3fbf8d18f64120b32",
+				"942337f8fd76f0fae8c52d7954810672" "b8548c10f51667f6e60e182fa19b30f7",
+				"0211c7c6190c9efd1237c34c8f2e06c4" "bda64f65276d2aacb8f90212203a808e",
+				"bd3820f732ffb53ec193e79d33e27c73" "d0168616861907d482e36cdac8cf5749",
+				"97b0f0f224b2d2317114808fb03af7a0" "e59616e469787939a063ceea9af956d1",
+				"c47e0dc1660919c11101208f9e69aa1f" "5ae4f12896b8379a2aad89b5b553d6b0",
+				"6b6b098d0c293bc2993d80bf0518b6d9" "8170cc3ccd92a698621b939dd38fe7b9",
+			}
+		}, {
+			"8b37641910833222772a",
+			{
+				"ab65c26eddb287600db2fda10d1e605c" "bb759010c29658f2c72d93a2d16d2930",
+				"b901e8036ed1c383cd3c4c4dd0a6ab05" "3d25ce4922924c55f064943353d78a6c",
+				"12c1aa44bbf87e75e611f69b2c38f49b" "28f2b3434b65c09877470044c6ea170d",
+				"bd9ef822de5288196134cf8af7839304" "67559c23f052158470a296f725735a32",
+				"8bab26fbc2c12b0f13e2ab185eabf241" "31185a6d696f0cfa9b42808b38e132a2",
+				"564d3dae183c5234c8af1e51061c44b5" "3c0778a7b5f72d3c23a3135c7d67b9f4",
+				"f34369890fcf16fb517dcaae4463b2dd" "02f31c81e8200731b899b028e791bfa7",
+				"72da646283228c14300853701795616f" "4e0a8c6f7934a788e2265e81d6d0c8f4",
+				"438dd5eafea0111b6f36b4b938da2a68" "5f6bfc73815874d97100f086979357d8",
+			}
+		}, {
+			"ebb46227c6cc8b37641910833222772a",
+			{
+				"720c94b63edf44e131d950ca211a5a30" "c366fdeacf9ca80436be7c358424d20b",
+				"b3394a40aabf75cba42282ef25a0059f" "4847d81da4942dbc249defc48c922b9f",
+				"08128c469f275342adda202b2b58da95" "970dacef40ad98723bac5d6955b81761",
+				"3cb89993b07b0ced93de13d2a11013ac" "ef2d676f1545c2c13dc680a02f4adbfe",
+				"b60595514f24bc9fe522a6cad7393644" "b515a8c5011754f59003058bdb81514e",
+				"3c70047e8cbc038e3b9820db601da495" "1175da6ee756de46a53e2b075660b770",
+				"00a542bba02111cc2c65b38ebdba587e" "5865fdbb5b48064104e830b380f2aede",
+				"34b21ad2ad44e999db2d7f0863f0d9b6" "84a9218fc36e8a5f2ccfbeae53a27d25",
+				"a2221a11b833ccb498a59540f0545f4a" "5bbeb4787d59e5373fdbea6c6f75c29b",
+			}
+		}, {
+			"c109163908ebe51debb46227c6cc8b37641910833222772a",
+			{
+				"54b64e6b5a20b5e2ec84593dc7989da7" "c135eee237a85465ff97dc03924f45ce",
+				"cfcc922fb4a14ab45d6175aabbf2d201" "837b87e2a446ad0ef798acd02b94124f",
+				"17a6dbd664926a0636b3f4c37a4f4694" "4a5f9f26aeeed4d4a25f632d305233d9",
+				"80a3d01ef00c8e9a4209c17f4eeb358c" "d15e7d5ffaaabc0207bf200a117793a2",
+				"349682bf588eaa52d0aa1560346aeafa" "f5854cdb76c889e3ad63354e5f7275e3",
+				"532c7ceccb39df3236318405a4b1279c" "baefe6d9ceb651842260e0d1e05e3b90",
+				"e82d8c6db54e3c633f581c952ba04207" "4b16e50abd381bd70900a9cd9a62cb23",
+				"3682ee33bd148bd9f58656cd8f30d9fb" "1e5a0b8475045d9b20b2628624edfd9e",
+				"63edd684fb826282fe528f9c0e9237bc" "e4dd2e98d6960fae0b43545456743391",
+			}
+		}, {
+			"1ada31d5cf688221c109163908ebe51debb46227c6cc8b37641910833222772a",
+			{
+				"dd5bcb0018e922d494759d7c395d02d3" "c8446f8f77abf737685353eb89a1c9eb",
+				"af3e30f9c095045938151575c3fb9098" "f8cb6274db99b80b1d2012a98ed48f0e",
+				"25c3005a1cb85de076259839ab7198ab" "9dcbc183e8cb994b727b75be3180769c",
+				"a1d3078dfa9169503ed9d4491dee4eb2" "8514a5495858096f596e4bcd66b10665",
+				"5f40d59ec1b03b33738efa60b2255d31" "3477c7f764a41baceff90bf14f92b7cc",
+				"ac4e95368d99b9eb78b8da8f81ffa795" "8c3c13f8c2388bb73f38576e65b7c446",
+				"13c4b9c1dfb66579eddd8a280b9f7316" "ddd27820550126698efaadc64b64f66e",
+				"f08f2e66d28ed143f3a237cf9de73559" "9ea36c525531b880ba124334f57b0b70",
+				"d5a39e3dfcc50280bac4a6b5aa0dca7d" "370b1c1fe655916d97fd0d47ca1d72b8",
+			}
+		}
+	};
+
+	RC4_CTX ctx;
+	uint8_t key[64];
+	uint8_t buffer[0x1010];
+
+	for (size_t i = 0; i < (sizeof(tests) / sizeof(*tests)); i++) {
+		size_t length = strlen(tests[i].key) / 2;
+		memcpy(key, fromhex(tests[i].key), length);
+		memset(buffer, 0, sizeof(buffer));
+
+		rc4_init(&ctx, key, length);
+		rc4_encrypt(&ctx, buffer, sizeof(buffer));
+
+		for (size_t j = 0; j < (sizeof(offsets) / sizeof(*offsets)); j++) {
+			size_t size = strlen(tests[i].vectors[j]) / 2;
+			ck_assert_mem_eq(&buffer[offsets[j]], fromhex(tests[i].vectors[j]), size);
+		}
+	}
+}
+END_TEST
+
 // define test suite and cases
 Suite *test_suite(void)
 {
@@ -3472,6 +3684,10 @@ Suite *test_suite(void)
 	tcase_add_test(tc, test_multibyte_address);
 	suite_add_tcase(s, tc);
 
+	tc = tcase_create("rc4");
+	tcase_add_test(tc, test_rc4_rfc6229);
+	suite_add_tcase(s, tc);
+
 	return s;
 }