libwinpr-crypto: add rand and RC4 functions with OpenSSL/mbedtls

winpr/include/winpr/crypto.h

@@ -802,5 +802,57 @@ WINPR_API int winpr_HMAC(int md, const BYTE* key, size_t keylen, const BYTE* inp
 }
 #endif
 
+/**
+ * Random Number Generation
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+WINPR_API int winpr_RAND(BYTE* output, size_t len);
+
+#ifdef __cplusplus
+}
+#endif
+
+/**
+ * RC4
+ */
+
+struct _OPENSSL_RC4_CTX
+{
+	int x, y;
+	int data[256];
+};
+typedef struct _OPENSSL_RC4_CTX OPENSSL_RC4_CTX;
+
+struct _MBEDTLS_RC4_CTX
+{
+	int x;
+	int y;
+	BYTE m[256];
+};
+typedef struct _MBEDTLS_RC4_CTX MBEDTLS_RC4_CTX;
+
+union _WINPR_RC4_CTX
+{
+	OPENSSL_RC4_CTX openssl;
+	MBEDTLS_RC4_CTX mbedtls;
+};
+typedef union _WINPR_RC4_CTX WINPR_RC4_CTX;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+WINPR_API void winpr_RC4_Init(WINPR_RC4_CTX* ctx, const BYTE* key, size_t keylen);
+WINPR_API int winpr_RC4_Update(WINPR_RC4_CTX* ctx, size_t length, const BYTE* input, BYTE* output);
+WINPR_API void winpr_RC4_Final(WINPR_RC4_CTX* ctx);
+
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* WINPR_CRYPTO_H */
 

winpr/libwinpr/crypto/CMakeLists.txt

@@ -17,6 +17,8 @@
 
 winpr_module_add(
 	hash.c
+	rand.c
+	cipher.c
 	cert.c
 	crypto.c
 	crypto.h)

winpr/libwinpr/crypto/cipher.c

@@ -0,0 +1,70 @@
+/**
+ * WinPR: Windows Portable Runtime
+ *
+ * Copyright 2015 Marc-Andre Moreau <marcandre.moreau@gmail.com>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <winpr/crt.h>
+
+#include <winpr/crypto.h>
+
+#ifdef WITH_OPENSSL
+#include <openssl/aes.h>
+#include <openssl/rc4.h>
+#include <openssl/des.h>
+#endif
+
+#ifdef WITH_MBEDTLS
+#include <mbedtls/aes.h>
+#include <mbedtls/arc4.h>
+#include <mbedtls/des.h>
+#endif
+
+/**
+ * RC4
+ */
+
+void winpr_RC4_Init(WINPR_RC4_CTX* ctx, const BYTE* key, size_t keylen)
+{
+#if defined(WITH_OPENSSL)
+	RC4_set_key((RC4_KEY*) ctx, keylen, key);
+#elif defined(WITH_MBEDTLS) && defined(MBEDTLS_ARC4_C)
+	mbedtls_arc4_init((mbedtls_arc4_context*) ctx);
+	mbedtls_arc4_setup((mbedtls_arc4_context*) ctx, key, keylen);
+#endif
+}
+
+int winpr_RC4_Update(WINPR_RC4_CTX* ctx, size_t length, const BYTE* input, BYTE* output)
+{
+#if defined(WITH_OPENSSL)
+	RC4((RC4_KEY*) ctx, length, input, output);
+#elif defined(WITH_MBEDTLS) && defined(MBEDTLS_ARC4_C)
+	mbedtls_arc4_crypt((mbedtls_arc4_context*) ctx, length, input, output);
+#endif
+	return 0;
+}
+
+void winpr_RC4_Final(WINPR_RC4_CTX* ctx)
+{
+#if defined(WITH_OPENSSL)
+
+#elif defined(WITH_MBEDTLS) && defined(MBEDTLS_ARC4_C)
+	mbedtls_arc4_free((mbedtls_arc4_context*) ctx);
+#endif
+}

winpr/libwinpr/crypto/rand.c

@@ -0,0 +1,51 @@
+/**
+ * WinPR: Windows Portable Runtime
+ *
+ * Copyright 2015 Marc-Andre Moreau <marcandre.moreau@gmail.com>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <winpr/crt.h>
+
+#include <winpr/crypto.h>
+
+#ifdef WITH_OPENSSL
+#include <openssl/rand.h>
+#endif
+
+#ifdef WITH_MBEDTLS
+#include <mbedtls/md.h>
+#include <mbedtls/entropy.h>
+#include <mbedtls/havege.h>
+#include <mbedtls/hmac_drbg.h>
+#endif
+
+#undef WITH_OPENSSL
+
+int winpr_RAND(BYTE* output, size_t len)
+{
+#if defined(WITH_OPENSSL)
+	RAND_bytes(output, len);
+#elif defined(WITH_MBEDTLS) && defined(MBEDTLS_HAVEGE_C)
+	mbedtls_havege_state hs;
+	mbedtls_havege_init(&hs);
+	mbedtls_havege_random(&hs, output, len);
+	mbedtls_havege_free(&hs);
+#endif
+	return 0;
+}

winpr/libwinpr/crypto/test/CMakeLists.txt

@@ -6,6 +6,8 @@ set(${MODULE_PREFIX}_DRIVER ${MODULE_NAME}.c)
 
 set(${MODULE_PREFIX}_TESTS
 	TestCryptoHash.c
+	TestCryptoRand.c
+	TestCryptoCipher.c
 	TestCryptoProtectData.c
 	TestCryptoProtectMemory.c
 	TestCryptoCertEnumCertificatesInStore.c)

winpr/libwinpr/crypto/test/TestCryptoCipher.c

@@ -0,0 +1,52 @@
+
+#include <winpr/crt.h>
+#include <winpr/print.h>
+#include <winpr/crypto.h>
+
+static const BYTE* TEST_RC4_KEY = (BYTE*) "Key";
+static const char* TEST_RC4_PLAINTEXT = "Plaintext";
+static const BYTE* TEST_RC4_CIPHERTEXT = (BYTE*) "\xBB\xF3\x16\xE8\xD9\x40\xAF\x0A\xD3";
+
+int test_crypto_cipher_rc4()
+{
+	size_t len;
+	BYTE* text;
+	WINPR_RC4_CTX ctx;
+
+	len = strlen(TEST_RC4_PLAINTEXT);
+
+	text = (BYTE*) calloc(1, len);
+
+	if (!text)
+		return -1;
+
+	winpr_RC4_Init(&ctx, TEST_RC4_KEY, strlen((char*) TEST_RC4_KEY));
+	winpr_RC4_Update(&ctx, len, (BYTE*) TEST_RC4_PLAINTEXT, text);
+	winpr_RC4_Final(&ctx);
+
+	if (memcmp(text, TEST_RC4_CIPHERTEXT, len) != 0)
+	{
+		char* actual;
+		char* expected;
+
+		actual = winpr_BinToHexString(text, len, FALSE);
+		expected = winpr_BinToHexString(TEST_RC4_CIPHERTEXT, len, FALSE);
+
+		fprintf(stderr, "unexpected RC4 ciphertext: Actual: %s Expected: %s\n", actual, expected);
+
+		free(actual);
+		free(expected);
+
+		return -1;
+	}
+
+	return 0;
+}
+
+int TestCryptoCipher(int argc, char* argv[])
+{
+	if (!test_crypto_cipher_rc4())
+		return -1;
+
+	return 0;
+}

winpr/libwinpr/crypto/test/TestCryptoRand.c

@@ -0,0 +1,25 @@
+
+#include <winpr/crt.h>
+#include <winpr/print.h>
+#include <winpr/crypto.h>
+
+int TestCryptoRand(int argc, char* argv[])
+{
+	char* str;
+	BYTE rnd[16];
+
+	ZeroMemory(rnd, sizeof(rnd));
+
+	winpr_RAND(rnd, sizeof(rnd));
+
+	str = winpr_BinToHexString(rnd, sizeof(rnd), FALSE);
+	//fprintf(stderr, "Rand: %s\n", str);
+	free(str);
+
+	if (memcmp(rnd, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 16) == 0)
+	{
+		return -1;
+	}
+
+	return 0;
+}