Allow modules to use the encryption modules to encrypt arbitrary things.

Made enc_old depend on enc_md5.
Allow not loading any encryption modules if you want to only use an
external mechanism.
Removed ns_sendpass since it's just a bad idea.

1 files changed, 242 insertions, 212 deletions

diff --git a/modules/encryption/enc_md5.cpp b/modules/encryption/enc_md5.cpp
index 45c7f3df5..ed7cce144 100644
--- a/modules/encryption/enc_md5.cpp
+++ b/modules/encryption/enc_md5.cpp
@@ -12,6 +12,7 @@
  */
 
 #include "module.h"
+#include "encryption.h"
 
 /*************************************************************************/
 
@@ -37,43 +38,6 @@ These notices must be retained in any copies of any part of this
 documentation and/or software.
  */
 
-/* MD5 context. */
-struct MD5_CTX
-{
-	unsigned state[4]; /* state (ABCD) */
-	unsigned count[2]; /* number of bits, modulo 2^64 (lsb first) */
-	unsigned char buffer[64]; /* input buffer */
-};
-
-/* MD5C.C - RSA Data Security, Inc., MD5 message-digest algorithm
- */
-
-/* Constants for MD5Transform routine.
- */
-enum
-{
-	S11 = 7,
-	S12 = 12,
-	S13 = 17,
-	S14 = 22,
-	S21 = 5,
-	S22 = 9,
-	S23 = 14,
-	S24 = 20,
-	S31 = 4,
-	S32 = 11,
-	S33 = 16,
-	S34 = 23,
-	S41 = 6,
-	S42 = 10,
-	S43 = 15,
-	S44 = 21
-};
-
-void MD5Transform(unsigned [4], const unsigned char [64]);
-void Encode(unsigned char *, unsigned *, unsigned);
-void Decode(unsigned *, const unsigned char *, unsigned);
-
 static unsigned char PADDING[64] = {
 	0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
 	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
@@ -119,203 +83,269 @@ inline static void II(unsigned &a, unsigned b, unsigned c, unsigned d, unsigned
 	a += b;
 }
 
-/* MD5 initialization. Begins an MD5 operation, writing a new context.
- */
-void MD5Init(MD5_CTX *context)
+static const uint32_t md5_iv[4] =
 {
-	context->count[0] = context->count[1] = 0;
-	/* Load magic initialization constants. */
-	context->state[0] = 0x67452301;
-	context->state[1] = 0xefcdab89;
-	context->state[2] = 0x98badcfe;
-	context->state[3] = 0x10325476;
-}
+	0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476
+};
 
-/* MD5 block update operation. Continues an MD5 message-digest
- * operation, processing another message block, and updating the
- * context.
- */
-void MD5Update(MD5_CTX *context, const unsigned char *input, unsigned inputLen)
+class MD5Context : public Encryption::Context
 {
-	unsigned i, index, partLen;
-
-	/* Compute number of bytes mod 64 */
-	index = (context->count[0] >> 3) & 0x3F;
+	unsigned state[4]; /* state (ABCD) */
+	unsigned count[2]; /* number of bits, modulo 2^64 (lsb first) */
+	unsigned char buffer[64]; /* input buffer */
+	unsigned char digest[16]; /* final digest */
 
-	/* Update number of bits */
-	if ((context->count[0] += inputLen << 3) < (inputLen << 3))
-		++context->count[1];
-	context->count[1] += inputLen >> 29;
+	/* Constants for MD5Transform routine.
+	 */
+	enum
+	{
+		S11 = 7,
+		S12 = 12,
+		S13 = 17,
+		S14 = 22,
+		S21 = 5,
+		S22 = 9,
+		S23 = 14,
+		S24 = 20,
+		S31 = 4,
+		S32 = 11,
+		S33 = 16,
+		S34 = 23,
+		S41 = 6,
+		S42 = 10,
+		S43 = 15,
+		S44 = 21
+	};
+
+	/* MD5 basic transformation. Transforms state based on block.
+	 */
+	void Transform(const unsigned char block[64])
+	{
+		unsigned a = state[0], b = state[1], c = state[2], d = state[3], x[16];
+
+		Decode(x, block, 64);
+
+		/* Round 1 */
+		FF(a, b, c, d, x[0], S11, 0xd76aa478); /* 1 */
+		FF(d, a, b, c, x[1], S12, 0xe8c7b756); /* 2 */
+		FF(c, d, a, b, x[2], S13, 0x242070db); /* 3 */
+		FF(b, c, d, a, x[3], S14, 0xc1bdceee); /* 4 */
+		FF(a, b, c, d, x[4], S11, 0xf57c0faf); /* 5 */
+		FF(d, a, b, c, x[5], S12, 0x4787c62a); /* 6 */
+		FF(c, d, a, b, x[6], S13, 0xa8304613); /* 7 */
+		FF(b, c, d, a, x[7], S14, 0xfd469501); /* 8 */
+		FF(a, b, c, d, x[8], S11, 0x698098d8); /* 9 */
+		FF(d, a, b, c, x[9], S12, 0x8b44f7af); /* 10 */
+		FF(c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */
+		FF(b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */
+		FF(a, b, c, d, x[12], S11, 0x6b901122); /* 13 */
+		FF(d, a, b, c, x[13], S12, 0xfd987193); /* 14 */
+		FF(c, d, a, b, x[14], S13, 0xa679438e); /* 15 */
+		FF(b, c, d, a, x[15], S14, 0x49b40821); /* 16 */
+
+		/* Round 2 */
+		GG(a, b, c, d, x[1], S21, 0xf61e2562); /* 17 */
+		GG(d, a, b, c, x[6], S22, 0xc040b340); /* 18 */
+		GG(c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */
+		GG(b, c, d, a, x[0], S24, 0xe9b6c7aa); /* 20 */
+		GG(a, b, c, d, x[5], S21, 0xd62f105d); /* 21 */
+		GG(d, a, b, c, x[10], S22, 0x2441453); /* 22 */
+		GG(c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */
+		GG(b, c, d, a, x[4], S24, 0xe7d3fbc8); /* 24 */
+		GG(a, b, c, d, x[9], S21, 0x21e1cde6); /* 25 */
+		GG(d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */
+		GG(c, d, a, b, x[3], S23, 0xf4d50d87); /* 27 */
+		GG(b, c, d, a, x[8], S24, 0x455a14ed); /* 28 */
+		GG(a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */
+		GG(d, a, b, c, x[2], S22, 0xfcefa3f8); /* 30 */
+		GG(c, d, a, b, x[7], S23, 0x676f02d9); /* 31 */
+		GG(b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */
+
+		/* Round 3 */
+		HH(a, b, c, d, x[5], S31, 0xfffa3942); /* 33 */
+		HH(d, a, b, c, x[8], S32, 0x8771f681); /* 34 */
+		HH(c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */
+		HH(b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */
+		HH(a, b, c, d, x[1], S31, 0xa4beea44); /* 37 */
+		HH(d, a, b, c, x[4], S32, 0x4bdecfa9); /* 38 */
+		HH(c, d, a, b, x[7], S33, 0xf6bb4b60); /* 39 */
+		HH(b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */
+		HH(a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */
+		HH(d, a, b, c, x[0], S32, 0xeaa127fa); /* 42 */
+		HH(c, d, a, b, x[3], S33, 0xd4ef3085); /* 43 */
+		HH(b, c, d, a, x[6], S34, 0x4881d05); /* 44 */
+		HH(a, b, c, d, x[9], S31, 0xd9d4d039); /* 45 */
+		HH(d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */
+		HH(c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */
+		HH(b, c, d, a, x[2], S34, 0xc4ac5665); /* 48 */
+
+		/* Round 4 */
+		II(a, b, c, d, x[0], S41, 0xf4292244); /* 49 */
+		II(d, a, b, c, x[7], S42, 0x432aff97); /* 50 */
+		II(c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */
+		II(b, c, d, a, x[5], S44, 0xfc93a039); /* 52 */
+		II(a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */
+		II(d, a, b, c, x[3], S42, 0x8f0ccc92); /* 54 */
+		II(c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */
+		II(b, c, d, a, x[1], S44, 0x85845dd1); /* 56 */
+		II(a, b, c, d, x[8], S41, 0x6fa87e4f); /* 57 */
+		II(d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */
+		II(c, d, a, b, x[6], S43, 0xa3014314); /* 59 */
+		II(b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */
+		II(a, b, c, d, x[4], S41, 0xf7537e82); /* 61 */
+		II(d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */
+		II(c, d, a, b, x[2], S43, 0x2ad7d2bb); /* 63 */
+		II(b, c, d, a, x[9], S44, 0xeb86d391); /* 64 */
+
+		state[0] += a;
+		state[1] += b;
+		state[2] += c;
+		state[3] += d;
+
+		/* Zeroize sensitive information. */
+		memset(x, 0, sizeof(x));
+	}
 
-	partLen = 64 - index;
+	/* Encodes input (unsigned) into output (unsigned char). Assumes len is
+	 * a multiple of 4.
+	 */
+	void Encode(unsigned char *output, unsigned *input, unsigned len)
+	{
+		for (unsigned i = 0, j = 0; j < len; ++i, j += 4)
+		{
+			output[j] = static_cast<unsigned char>(input[i] & 0xff);
+			output[j + 1] = static_cast<unsigned char>((input[i] >> 8) & 0xff);
+			output[j + 2] = static_cast<unsigned char>((input[i] >> 16) & 0xff);
+			output[j + 3] = static_cast<unsigned char>((input[i] >> 24) & 0xff);
+		}
+	}
 
-	/* Transform as many times as possible. */
-	if (inputLen >= partLen)
+	/* Decodes input (unsigned char) into output (unsigned). Assumes len is
+	 * a multiple of 4.
+	 */
+	void Decode(unsigned *output, const unsigned char *input, unsigned len)
 	{
-		memcpy(&context->buffer[index], input, partLen);
-		MD5Transform(context->state, context->buffer);
+		for (unsigned i = 0, j = 0; j < len; ++i, j += 4)
+			output[i] = static_cast<unsigned>(input[j]) | (static_cast<unsigned>(input[j + 1]) << 8) | (static_cast<unsigned>(input[j + 2]) << 16) | (static_cast<unsigned>(input[j + 3]) << 24);
+	}
 
-		for (i = partLen; i + 63 < inputLen; i += 64)
-			MD5Transform(context->state, &input[i]);
+ public:
+	MD5Context(Encryption::IV *iv = NULL)
+	{
+		if (iv != NULL)
+		{
+			if (iv->second != 4)
+				throw CoreException("Invalid IV size");
+			/* Load magic initialization constants. */
+			for (int i = 0; i < 4; ++i)
+				this->state[i] = iv->first[i];
+		}
+		else
+			for (int i = 0; i < 4; ++i)
+				this->state[i] = md5_iv[i];
 
-		index = 0;
+		this->count[0] = this->count[1] = 0;
+		memset(this->buffer, 0, sizeof(this->buffer));
 	}
-	else
-		i = 0;
 
-	/* Buffer remaining input */
-	memcpy(&context->buffer[index], &input[i], inputLen - i);
-}
+	/* MD5 block update operation. Continues an MD5 message-digest
+	 * operation, processing another message block, and updating the
+	 * context.
+	 */
+	void Update(const unsigned char *input, size_t len) anope_override
+	{
+		unsigned i, index, partLen;
 
-/* MD5 finalization. Ends an MD5 message-digest operation, writing the
- * the message digest and zeroizing the context.
- */
-void MD5Final(unsigned char digest[17], MD5_CTX *context)
-{
-	unsigned char bits[8];
-	unsigned index, padLen;
+		/* Compute number of bytes mod 64 */
+		index = (this->count[0] >> 3) & 0x3F;
 
-	/* Save number of bits */
-	Encode(bits, context->count, 8);
+		/* Update number of bits */
+		if ((this->count[0] += len << 3) < (len << 3))
+			++this->count[1];
+		this->count[1] += len >> 29;
 
-	/* Pad out to 56 mod 64. */
-	index = (context->count[0] >> 3) & 0x3f;
-	padLen = index < 56 ? 56 - index : 120 - index;
-	MD5Update(context, PADDING, padLen);
+		partLen = 64 - index;
 
-	/* Append length (before padding) */
-	MD5Update(context, bits, 8);
-	/* Store state in digest */
-	Encode(digest, context->state, 16);
+		/* Transform as many times as possible. */
+		if (len >= partLen)
+		{
+			memcpy(&this->buffer[index], input, partLen);
+			this->Transform(this->buffer);
 
-	/* Zeroize sensitive information. */
-	memset(context, 0, sizeof(*context));
-}
+			for (i = partLen; i + 63 < len; i += 64)
+				this->Transform(&input[i]);
 
-/* MD5 basic transformation. Transforms state based on block.
- */
-void MD5Transform(unsigned state[4], const unsigned char block[64])
-{
-	unsigned a = state[0], b = state[1], c = state[2], d = state[3], x[16];
-
-	Decode(x, block, 64);
-
-	/* Round 1 */
-	FF(a, b, c, d, x[0], S11, 0xd76aa478); /* 1 */
-	FF(d, a, b, c, x[1], S12, 0xe8c7b756); /* 2 */
-	FF(c, d, a, b, x[2], S13, 0x242070db); /* 3 */
-	FF(b, c, d, a, x[3], S14, 0xc1bdceee); /* 4 */
-	FF(a, b, c, d, x[4], S11, 0xf57c0faf); /* 5 */
-	FF(d, a, b, c, x[5], S12, 0x4787c62a); /* 6 */
-	FF(c, d, a, b, x[6], S13, 0xa8304613); /* 7 */
-	FF(b, c, d, a, x[7], S14, 0xfd469501); /* 8 */
-	FF(a, b, c, d, x[8], S11, 0x698098d8); /* 9 */
-	FF(d, a, b, c, x[9], S12, 0x8b44f7af); /* 10 */
-	FF(c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */
-	FF(b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */
-	FF(a, b, c, d, x[12], S11, 0x6b901122); /* 13 */
-	FF(d, a, b, c, x[13], S12, 0xfd987193); /* 14 */
-	FF(c, d, a, b, x[14], S13, 0xa679438e); /* 15 */
-	FF(b, c, d, a, x[15], S14, 0x49b40821); /* 16 */
-
-	/* Round 2 */
-	GG(a, b, c, d, x[1], S21, 0xf61e2562); /* 17 */
-	GG(d, a, b, c, x[6], S22, 0xc040b340); /* 18 */
-	GG(c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */
-	GG(b, c, d, a, x[0], S24, 0xe9b6c7aa); /* 20 */
-	GG(a, b, c, d, x[5], S21, 0xd62f105d); /* 21 */
-	GG(d, a, b, c, x[10], S22, 0x2441453); /* 22 */
-	GG(c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */
-	GG(b, c, d, a, x[4], S24, 0xe7d3fbc8); /* 24 */
-	GG(a, b, c, d, x[9], S21, 0x21e1cde6); /* 25 */
-	GG(d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */
-	GG(c, d, a, b, x[3], S23, 0xf4d50d87); /* 27 */
-	GG(b, c, d, a, x[8], S24, 0x455a14ed); /* 28 */
-	GG(a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */
-	GG(d, a, b, c, x[2], S22, 0xfcefa3f8); /* 30 */
-	GG(c, d, a, b, x[7], S23, 0x676f02d9); /* 31 */
-	GG(b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */
-
-	/* Round 3 */
-	HH(a, b, c, d, x[5], S31, 0xfffa3942); /* 33 */
-	HH(d, a, b, c, x[8], S32, 0x8771f681); /* 34 */
-	HH(c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */
-	HH(b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */
-	HH(a, b, c, d, x[1], S31, 0xa4beea44); /* 37 */
-	HH(d, a, b, c, x[4], S32, 0x4bdecfa9); /* 38 */
-	HH(c, d, a, b, x[7], S33, 0xf6bb4b60); /* 39 */
-	HH(b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */
-	HH(a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */
-	HH(d, a, b, c, x[0], S32, 0xeaa127fa); /* 42 */
-	HH(c, d, a, b, x[3], S33, 0xd4ef3085); /* 43 */
-	HH(b, c, d, a, x[6], S34, 0x4881d05); /* 44 */
-	HH(a, b, c, d, x[9], S31, 0xd9d4d039); /* 45 */
-	HH(d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */
-	HH(c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */
-	HH(b, c, d, a, x[2], S34, 0xc4ac5665); /* 48 */
-
-	/* Round 4 */
-	II(a, b, c, d, x[0], S41, 0xf4292244); /* 49 */
-	II(d, a, b, c, x[7], S42, 0x432aff97); /* 50 */
-	II(c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */
-	II(b, c, d, a, x[5], S44, 0xfc93a039); /* 52 */
-	II(a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */
-	II(d, a, b, c, x[3], S42, 0x8f0ccc92); /* 54 */
-	II(c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */
-	II(b, c, d, a, x[1], S44, 0x85845dd1); /* 56 */
-	II(a, b, c, d, x[8], S41, 0x6fa87e4f); /* 57 */
-	II(d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */
-	II(c, d, a, b, x[6], S43, 0xa3014314); /* 59 */
-	II(b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */
-	II(a, b, c, d, x[4], S41, 0xf7537e82); /* 61 */
-	II(d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */
-	II(c, d, a, b, x[2], S43, 0x2ad7d2bb); /* 63 */
-	II(b, c, d, a, x[9], S44, 0xeb86d391); /* 64 */
-
-	state[0] += a;
-	state[1] += b;
-	state[2] += c;
-	state[3] += d;
-
-	/* Zeroize sensitive information. */
-	memset(x, 0, sizeof(x));
-}
+			index = 0;
+		}
+		else
+			i = 0;
 
-/* Encodes input (unsigned) into output (unsigned char). Assumes len is
- * a multiple of 4.
- */
-void Encode(unsigned char *output, unsigned *input, unsigned len)
-{
-	unsigned i, j;
+		/* Buffer remaining input */
+		memcpy(&this->buffer[index], &input[i], len - i);
+	}
 
-	for (i = 0, j = 0; j < len; ++i, j += 4)
+	/* MD5 finalization. Ends an MD5 message-digest opera
+	 * the message digest and zeroizing the context.
+	 */  
+	void Finalize() anope_override
 	{
-		output[j] = static_cast<unsigned char>(input[i] & 0xff);
-		output[j + 1] = static_cast<unsigned char>((input[i] >> 8) & 0xff);
-		output[j + 2] = static_cast<unsigned char>((input[i] >> 16) & 0xff);
-		output[j + 3] = static_cast<unsigned char>((input[i] >> 24) & 0xff);
+		unsigned char bits[8];
+		unsigned index, padLen;
+
+		/* Save number of bits */
+		this->Encode(bits, this->count, 8);
+
+		/* Pad out to 56 mod 64. */
+		index = (this->count[0] >> 3) & 0x3f;
+		padLen = index < 56 ? 56 - index : 120 - index;
+		this->Update(PADDING, padLen);
+
+		/* Append length (before padding) */
+		this->Update(bits, 8);
+		/* Store state in digest */
+		this->Encode(digest, this->state, 16);
+
+		/* Zeroize sensitive information. */
+		memset(this->state, 0, sizeof(this->state));
+		memset(this->count, 0, sizeof(this->count));
+		memset(this->buffer, 0, sizeof(this->buffer));
 	}
-}
 
-/* Decodes input (unsigned char) into output (unsigned). Assumes len is
- * a multiple of 4.
- */
-void Decode(unsigned *output, const unsigned char *input, unsigned len)
-{
-	unsigned i, j;
+	Encryption::Hash GetFinalizedHash() anope_override
+	{
+		Encryption::Hash hash;
+		hash.first = this->digest;
+		hash.second = sizeof(this->digest);
+		return hash;
+	}
+};
 
-	for (i = 0, j = 0; j < len; ++i, j += 4)
-		output[i] = static_cast<unsigned>(input[j]) | (static_cast<unsigned>(input[j + 1]) << 8) | (static_cast<unsigned>(input[j + 2]) << 16) | (static_cast<unsigned>(input[j + 3]) << 24);
-}
+class MD5Provider : public Encryption::Provider
+{
+ public:
+ 	MD5Provider(Module *creator) : Encryption::Provider(creator, "md5") { }
 
-/*************************************************************************/
+	Encryption::Context *CreateContext(Encryption::IV *iv) anope_override
+	{
+		return new MD5Context(iv);
+	}
 
-/* Module stuff. */
+	Encryption::IV GetDefaultIV() anope_override
+	{
+		Encryption::IV iv;
+		iv.first = md5_iv;
+		iv.second = sizeof(md5_iv) / sizeof(uint32_t);
+		return iv;
+	}
+};
 
 class EMD5 : public Module
 {
+	MD5Provider md5provider;
+
  public:
-	EMD5(const Anope::string &modname, const Anope::string &creator) : Module(modname, creator, ENCRYPTION)
+	EMD5(const Anope::string &modname, const Anope::string &creator) : Module(modname, creator, ENCRYPTION),
+		md5provider(this)
 	{
 		this->SetAuthor("Anope");
 
@@ -325,15 +355,15 @@ class EMD5 : public Module
 
 	EventReturn OnEncrypt(const Anope::string &src, Anope::string &dest) anope_override
 	{
-		MD5_CTX context;
-		char digest[17] = "";
-		Anope::string buf = "md5:";
+		MD5Context context;
+
+		context.Update(reinterpret_cast<const unsigned char *>(src.c_str()), src.length());
+		context.Finalize();
+
+		Encryption::Hash hash = context.GetFinalizedHash();
 
-		MD5Init(&context);
-		MD5Update(&context, reinterpret_cast<const unsigned char *>(src.c_str()), src.length());
-		MD5Final(reinterpret_cast<unsigned char *>(digest), &context);
+		Anope::string buf = "md5:" + Anope::Hex(reinterpret_cast<const char *>(hash.first), hash.second);
 
-		buf += Anope::Hex(digest, 16);
 		Log(LOG_DEBUG_2) << "(enc_md5) hashed password from [" << src << "] to [" << buf << "]";
 		dest = buf;
 		return EVENT_ALLOW;