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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.
This commit is contained in:
Adam
+41
-308
@@ -10,342 +10,75 @@
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*/
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#include "module.h"
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#include "encryption.h"
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/******** Code specific to the type of encryption. ********/
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static ServiceReference<Encryption::Provider> md5("Encryption::Provider", "md5");
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/* Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All
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rights reserved.
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License to copy and use this software is granted provided that it
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is identified as the "RSA Data Security, Inc. MD5 Message-Digest
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Algorithm" in all material mentioning or referencing this software
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or this function.
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License is also granted to make and use derivative works provided
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that such works are identified as "derived from the RSA Data
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Security, Inc. MD5 Message-Digest Algorithm" in all material
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mentioning or referencing the derived work.
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RSA Data Security, Inc. makes no representations concerning either
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the merchantability of this software or the suitability of this
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software for any particular purpose. It is provided "as is"
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without express or implied warranty of any kind.
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These notices must be retained in any copies of any part of this
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documentation and/or software.
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*/
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/* MD5 context. */
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struct MD5_CTX
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class OldMD5Provider : public Encryption::Provider
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{
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unsigned state[4]; /* state (ABCD) */
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unsigned count[2]; /* number of bits, modulo 2^64 (lsb first) */
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unsigned char buffer[64]; /* input buffer */
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};
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public:
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OldMD5Provider(Module *creator) : Encryption::Provider(creator, "oldmd5") { }
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/* MD5C.C - RSA Data Security, Inc., MD5 message-digest algorithm
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*/
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/* Constants for MD5Transform routine.
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*/
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enum
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{
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S11 = 7,
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S12 = 12,
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S13 = 17,
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S14 = 22,
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S21 = 5,
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S22 = 9,
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S23 = 14,
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S24 = 20,
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S31 = 4,
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S32 = 11,
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S33 = 16,
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S34 = 23,
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S41 = 6,
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S42 = 10,
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S43 = 15,
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S44 = 21
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};
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static void MD5Transform(unsigned [4], const unsigned char[64]);
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static void Encode(unsigned char *, unsigned *, unsigned);
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static void Decode(unsigned *, const unsigned char *, unsigned);
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static unsigned char PADDING[64] = {
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0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
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};
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/* F, G, H and I are basic MD5 functions.
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*/
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inline static unsigned F(unsigned x, unsigned y, unsigned z) { return (x & y) | (~x & z); }
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inline static unsigned G(unsigned x, unsigned y, unsigned z) { return (x & z) | (y & ~z); }
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inline static unsigned H(unsigned x, unsigned y, unsigned z) { return x ^ y ^ z; }
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inline static unsigned MD5_I(unsigned x, unsigned y, unsigned z) { return y ^ (x | ~z); }
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/* ROTATE_LEFT rotates x left n bits.
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*/
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inline static unsigned ROTATE_LEFT(unsigned x, unsigned n) { return (x << n) | (x >> (32 - n)); }
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/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
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* Rotation is separate from addition to prevent recomputation.
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*/
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inline static void FF(unsigned &a, unsigned b, unsigned c, unsigned d, unsigned x, unsigned s, unsigned ac)
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{
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a += F(b, c, d) + x + ac;
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a = ROTATE_LEFT(a, s);
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a += b;
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}
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inline static void GG(unsigned &a, unsigned b, unsigned c, unsigned d, unsigned x, unsigned s, unsigned ac)
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{
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a += G(b, c, d) + x + ac;
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a = ROTATE_LEFT(a, s);
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a += b;
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}
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inline static void HH(unsigned &a, unsigned b, unsigned c, unsigned d, unsigned x, unsigned s, unsigned ac)
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{
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a += H(b, c, d) + x + ac;
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a = ROTATE_LEFT(a, s);
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a += b;
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}
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inline static void II(unsigned &a, unsigned b, unsigned c, unsigned d, unsigned x, unsigned s, unsigned ac)
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{
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a += MD5_I(b, c, d) + x + ac;
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a = ROTATE_LEFT(a, s);
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a += b;
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}
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/* MD5 initialization. Begins an MD5 operation, writing a new context.
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*/
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static void MD5Init(MD5_CTX *context)
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{
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context->count[0] = context->count[1] = 0;
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/* Load magic initialization constants.
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*/
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context->state[0] = 0x67452301;
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context->state[1] = 0xefcdab89;
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context->state[2] = 0x98badcfe;
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context->state[3] = 0x10325476;
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}
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/* MD5 block update operation. Continues an MD5 message-digest
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* operation, processing another message block, and updating the
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* context.
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*/
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static void MD5Update(MD5_CTX *context, const unsigned char *input, unsigned inputLen)
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{
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unsigned i, index, partLen;
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/* Compute number of bytes mod 64 */
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index = (context->count[0] >> 3) & 0x3F;
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/* Update number of bits */
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if ((context->count[0] += inputLen << 3) < (inputLen << 3))
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++context->count[1];
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context->count[1] += inputLen >> 29;
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partLen = 64 - index;
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/* Transform as many times as possible.
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*/
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if (inputLen >= partLen)
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Encryption::Context *CreateContext(Encryption::IV *iv) anope_override
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{
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memcpy(&context->buffer[index], input, partLen);
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MD5Transform(context->state, context->buffer);
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for (i = partLen; i + 63 < inputLen; i += 64)
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MD5Transform(context->state, &input[i]);
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index = 0;
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if (md5)
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return md5->CreateContext(iv);
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return NULL;
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}
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else
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i = 0;
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/* Buffer remaining input */
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memcpy(&context->buffer[index], &input[i], inputLen - i);
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}
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/* MD5 finalization. Ends an MD5 message-digest operation, writing the
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* the message digest and zeroizing the context.
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*/
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static void MD5Final(unsigned char digest[17], MD5_CTX *context)
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{
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unsigned char bits[8];
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unsigned index, padLen;
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/* Save number of bits */
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Encode(bits, context->count, 8);
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/* Pad out to 56 mod 64.
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*/
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index = (context->count[0] >> 3) & 0x3f;
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padLen = index < 56 ? 56 - index : 120 - index;
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MD5Update(context, PADDING, padLen);
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/* Append length (before padding) */
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MD5Update(context, bits, 8);
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/* Store state in digest */
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Encode(digest, context->state, 16);
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/* Zeroize sensitive information.
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*/
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memset(context, 0, sizeof(*context));
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}
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/* MD5 basic transformation. Transforms state based on block.
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*/
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static void MD5Transform(unsigned state[4], const unsigned char block[64])
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{
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unsigned a = state[0], b = state[1], c = state[2], d = state[3], x[16];
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Decode(x, block, 64);
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/* Round 1 */
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FF(a, b, c, d, x[0], S11, 0xd76aa478); /* 1 */
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FF(d, a, b, c, x[1], S12, 0xe8c7b756); /* 2 */
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FF(c, d, a, b, x[2], S13, 0x242070db); /* 3 */
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FF(b, c, d, a, x[3], S14, 0xc1bdceee); /* 4 */
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FF(a, b, c, d, x[4], S11, 0xf57c0faf); /* 5 */
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FF(d, a, b, c, x[5], S12, 0x4787c62a); /* 6 */
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FF(c, d, a, b, x[6], S13, 0xa8304613); /* 7 */
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FF(b, c, d, a, x[7], S14, 0xfd469501); /* 8 */
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FF(a, b, c, d, x[8], S11, 0x698098d8); /* 9 */
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FF(d, a, b, c, x[9], S12, 0x8b44f7af); /* 10 */
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FF(c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */
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FF(b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */
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FF(a, b, c, d, x[12], S11, 0x6b901122); /* 13 */
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FF(d, a, b, c, x[13], S12, 0xfd987193); /* 14 */
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FF(c, d, a, b, x[14], S13, 0xa679438e); /* 15 */
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FF(b, c, d, a, x[15], S14, 0x49b40821); /* 16 */
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/* Round 2 */
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GG(a, b, c, d, x[1], S21, 0xf61e2562); /* 17 */
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GG(d, a, b, c, x[6], S22, 0xc040b340); /* 18 */
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GG(c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */
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GG(b, c, d, a, x[0], S24, 0xe9b6c7aa); /* 20 */
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GG(a, b, c, d, x[5], S21, 0xd62f105d); /* 21 */
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GG(d, a, b, c, x[10], S22, 0x2441453); /* 22 */
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GG(c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */
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GG(b, c, d, a, x[4], S24, 0xe7d3fbc8); /* 24 */
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GG(a, b, c, d, x[9], S21, 0x21e1cde6); /* 25 */
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GG(d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */
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GG(c, d, a, b, x[3], S23, 0xf4d50d87); /* 27 */
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GG(b, c, d, a, x[8], S24, 0x455a14ed); /* 28 */
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GG(a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */
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GG(d, a, b, c, x[2], S22, 0xfcefa3f8); /* 30 */
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GG(c, d, a, b, x[7], S23, 0x676f02d9); /* 31 */
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GG(b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */
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/* Round 3 */
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HH(a, b, c, d, x[5], S31, 0xfffa3942); /* 33 */
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HH(d, a, b, c, x[8], S32, 0x8771f681); /* 34 */
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HH(c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */
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HH(b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */
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HH(a, b, c, d, x[1], S31, 0xa4beea44); /* 37 */
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HH(d, a, b, c, x[4], S32, 0x4bdecfa9); /* 38 */
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HH(c, d, a, b, x[7], S33, 0xf6bb4b60); /* 39 */
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HH(b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */
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HH(a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */
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HH(d, a, b, c, x[0], S32, 0xeaa127fa); /* 42 */
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HH(c, d, a, b, x[3], S33, 0xd4ef3085); /* 43 */
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HH(b, c, d, a, x[6], S34, 0x4881d05); /* 44 */
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HH(a, b, c, d, x[9], S31, 0xd9d4d039); /* 45 */
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HH(d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */
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HH(c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */
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HH(b, c, d, a, x[2], S34, 0xc4ac5665); /* 48 */
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/* Round 4 */
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II(a, b, c, d, x[0], S41, 0xf4292244); /* 49 */
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II(d, a, b, c, x[7], S42, 0x432aff97); /* 50 */
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II(c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */
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II(b, c, d, a, x[5], S44, 0xfc93a039); /* 52 */
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II(a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */
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II(d, a, b, c, x[3], S42, 0x8f0ccc92); /* 54 */
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II(c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */
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II(b, c, d, a, x[1], S44, 0x85845dd1); /* 56 */
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II(a, b, c, d, x[8], S41, 0x6fa87e4f); /* 57 */
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II(d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */
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II(c, d, a, b, x[6], S43, 0xa3014314); /* 59 */
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II(b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */
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II(a, b, c, d, x[4], S41, 0xf7537e82); /* 61 */
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II(d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */
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II(c, d, a, b, x[2], S43, 0x2ad7d2bb); /* 63 */
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II(b, c, d, a, x[9], S44, 0xeb86d391); /* 64 */
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state[0] += a;
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state[1] += b;
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state[2] += c;
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state[3] += d;
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/* Zeroize sensitive information.
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*/
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memset(x, 0, sizeof(x));
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}
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/* Encodes input (unsigned) into output (unsigned char). Assumes len is
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* a multiple of 4.
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*/
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static void Encode(unsigned char *output, unsigned *input, unsigned len)
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{
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unsigned i, j;
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for (i = 0, j = 0; j < len; ++i, j += 4)
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Encryption::IV GetDefaultIV() anope_override
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{
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output[j] = static_cast<unsigned char>(input[i] & 0xff);
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output[j + 1] = static_cast<unsigned char>((input[i] >> 8) & 0xff);
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output[j + 2] = static_cast<unsigned char>((input[i] >> 16) & 0xff);
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output[j + 3] = static_cast<unsigned char>((input[i] >> 24) & 0xff);
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if (md5)
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return md5->GetDefaultIV();
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return Encryption::IV(NULL, 0);
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}
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}
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/* Decodes input (unsigned char) into output (unsigned). Assumes len is
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* a multiple of 4.
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*/
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static void Decode(unsigned *output, const unsigned char *input, unsigned len)
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{
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unsigned i, j;
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for (i = 0, j = 0; j < len; ++i, j += 4)
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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);
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}
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/*************************************************************************/
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/******** Our own high-level routines. ********/
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inline static char XTOI(char c) { return c > 9 ? c - 'A' + 10 : c - '0'; }
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};
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class EOld : public Module
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{
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OldMD5Provider oldmd5provider;
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inline static char XTOI(char c) { return c > 9 ? c - 'A' + 10 : c - '0'; }
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public:
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EOld(const Anope::string &modname, const Anope::string &creator) : Module(modname, creator, ENCRYPTION)
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EOld(const Anope::string &modname, const Anope::string &creator) : Module(modname, creator, ENCRYPTION),
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oldmd5provider(this)
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{
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this->SetAuthor("Anope");
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ModuleManager::LoadModule("enc_md5", User::Find(creator));
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if (!md5)
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throw ModuleException("Unable to find md5 reference");
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Implementation i[] = { I_OnEncrypt, I_OnCheckAuthentication };
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ModuleManager::Attach(i, this, sizeof(i) / sizeof(Implementation));
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}
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EventReturn OnEncrypt(const Anope::string &src, Anope::string &dest) anope_override
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{
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MD5_CTX context;
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char digest[33] = "", digest2[17] = "";
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int i;
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Anope::string buf = "oldmd5:";
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if (!md5)
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return EVENT_CONTINUE;
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memset(&context, 0, sizeof(context));
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Encryption::Context *context = md5->CreateContext();
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context->Update(reinterpret_cast<const unsigned char *>(src.c_str()), src.length());
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context->Finalize();
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MD5Init(&context);
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MD5Update(&context, reinterpret_cast<const unsigned char *>(src.c_str()), src.length());
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MD5Final(reinterpret_cast<unsigned char *>(digest), &context);
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for (i = 0; i < 32; i += 2)
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Encryption::Hash hash = context->GetFinalizedHash();
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char digest[32], digest2[16];
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memset(digest, 0, sizeof(digest));
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if (hash.second > sizeof(digest))
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throw CoreException("Hash too large");
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memcpy(digest, hash.first, hash.second);
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for (int i = 0; i < 32; i += 2)
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digest2[i / 2] = XTOI(digest[i]) << 4 | XTOI(digest[i + 1]);
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buf += Anope::Hex(digest2, 16);
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Anope::string buf = "oldmd5:" + Anope::Hex(digest2, sizeof(digest2));
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Log(LOG_DEBUG_2) << "(enc_old) hashed password from [" << src << "] to [" << buf << "]";
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dest = buf;
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delete context;
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return EVENT_ALLOW;
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}
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