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-rw-r--r--modules/encryption/enc_md5.cpp382
1 files changed, 39 insertions, 343 deletions
diff --git a/modules/encryption/enc_md5.cpp b/modules/encryption/enc_md5.cpp
index 15cf2cf2e..023e04656 100644
--- a/modules/encryption/enc_md5.cpp
+++ b/modules/encryption/enc_md5.cpp
@@ -5,7 +5,7 @@
* Contact us at team@anope.org
*
* Taken from IRC Services and is copyright (c) 1996-2002 Andrew Church.
- * E-mail: <achurch@achurch.org>
+ * Email: <achurch@achurch.org>
* Parts written by Andrew Kempe and others.
* This program is free but copyrighted software; see the file COPYING for
* details.
@@ -14,377 +14,73 @@
#include "module.h"
#include "modules/encryption.h"
-/* Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All
-rights reserved.
+#include "md5/md5.c"
-License to copy and use this software is granted provided that it
-is identified as the "RSA Data Security, Inc. MD5 Message-Digest
-Algorithm" in all material mentioning or referencing this software
-or this function.
-
-License is also granted to make and use derivative works provided
-that such works are identified as "derived from the RSA Data
-Security, Inc. MD5 Message-Digest Algorithm" in all material
-mentioning or referencing the derived work.
-
-RSA Data Security, Inc. makes no representations concerning either
-the merchantability of this software or the suitability of this
-software for any particular purpose. It is provided "as is"
-without express or implied warranty of any kind.
-
-These notices must be retained in any copies of any part of this
-documentation and/or software.
- */
-
-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,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
-};
-
-/* F, G, H and I are basic MD5 functions.
- */
-inline static unsigned F(unsigned x, unsigned y, unsigned z) { return (x & y) | (~x & z); }
-inline static unsigned G(unsigned x, unsigned y, unsigned z) { return (x & z) | (y & ~z); }
-inline static unsigned H(unsigned x, unsigned y, unsigned z) { return x ^ y ^ z; }
-inline static unsigned I(unsigned x, unsigned y, unsigned z) { return y ^ (x | ~z); }
-
-/* ROTATE_LEFT rotates x left n bits.
- */
-inline static unsigned ROTATE_LEFT(unsigned x, unsigned n) { return (x << n) | (x >> (32 - n)); }
-
-/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
- * Rotation is separate from addition to prevent recomputation.
- */
-inline static void FF(unsigned &a, unsigned b, unsigned c, unsigned d, unsigned x, unsigned s, unsigned ac)
-{
- a += F(b, c, d) + x + ac;
- a = ROTATE_LEFT(a, s);
- a += b;
-}
-inline static void GG(unsigned &a, unsigned b, unsigned c, unsigned d, unsigned x, unsigned s, unsigned ac)
-{
- a += G(b, c, d) + x + ac;
- a = ROTATE_LEFT(a, s);
- a += b;
-}
-inline static void HH(unsigned &a, unsigned b, unsigned c, unsigned d, unsigned x, unsigned s, unsigned ac)
-{
- a += H(b, c, d) + x + ac;
- a = ROTATE_LEFT(a, s);
- a += b;
-}
-inline static void II(unsigned &a, unsigned b, unsigned c, unsigned d, unsigned x, unsigned s, unsigned ac)
-{
- a += I(b, c, d) + x + ac;
- a = ROTATE_LEFT(a, s);
- a += b;
-}
-
-static const uint32_t md5_iv[4] =
-{
- 0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476
-};
-
-class MD5Context : public Encryption::Context
+class MD5Context final
+ : public Encryption::Context
{
- 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 */
-
- /* 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));
- }
-
- /* 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);
- }
- }
-
- /* Decodes input (unsigned char) into output (unsigned). Assumes len is
- * a multiple of 4.
- */
- void Decode(unsigned *output, const unsigned char *input, unsigned len)
- {
- 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);
- }
-
- 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];
+private:
+ MD5_CTX context;
- this->count[0] = this->count[1] = 0;
- memset(this->buffer, 0, sizeof(this->buffer));
- }
-
- /* 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
+public:
+ MD5Context()
{
- unsigned i, index, partLen;
-
- /* Compute number of bytes mod 64 */
- index = (this->count[0] >> 3) & 0x3F;
-
- /* Update number of bits */
- if ((this->count[0] += len << 3) < (len << 3))
- ++this->count[1];
- this->count[1] += len >> 29;
-
- partLen = 64 - index;
-
- /* Transform as many times as possible. */
- if (len >= partLen)
- {
- memcpy(&this->buffer[index], input, partLen);
- this->Transform(this->buffer);
-
- for (i = partLen; i + 63 < len; i += 64)
- this->Transform(&input[i]);
-
- index = 0;
- }
- else
- i = 0;
-
- /* Buffer remaining input */
- memcpy(&this->buffer[index], &input[i], len - i);
+ MD5_Init(&context);
}
- /* MD5 finalization. Ends an MD5 message-digest opera
- * the message digest and zeroizing the context.
- */
- void Finalize() anope_override
+ void Update(const unsigned char *input, size_t len) override
{
- 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));
+ MD5_Update(&context, input, len);
}
- Encryption::Hash GetFinalizedHash() anope_override
+ Anope::string Finalize() override
{
- Encryption::Hash hash;
- hash.first = this->digest;
- hash.second = sizeof(this->digest);
- return hash;
+ unsigned char digest[16];
+ MD5_Final(digest, &context);
+ return Anope::string(reinterpret_cast<const char *>(&digest), sizeof(digest));
}
};
-class MD5Provider : public Encryption::Provider
+class EMD5 final
+ : public Module
{
- public:
- MD5Provider(Module *creator) : Encryption::Provider(creator, "md5") { }
+private:
+ Encryption::SimpleProvider<MD5Context> md5provider;
- Encryption::Context *CreateContext(Encryption::IV *iv) anope_override
- {
- return new MD5Context(iv);
- }
-
- 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 | VENDOR),
- md5provider(this)
+public:
+ EMD5(const Anope::string &modname, const Anope::string &creator)
+ : Module(modname, creator, ENCRYPTION | VENDOR)
+ , md5provider(this, "md5", 16, 64)
{
+ if (ModuleManager::FindFirstOf(ENCRYPTION) == this)
+ throw ModuleException("enc_md5 is deprecated and can not be used as a primary encryption method");
+ md5provider.Check({
+ { "d41d8cd98f00b204e9800998ecf8427e", "" },
+ { "9e107d9d372bb6826bd81d3542a419d6", "The quick brown fox jumps over the lazy dog" },
+ });
}
- EventReturn OnEncrypt(const Anope::string &src, Anope::string &dest) anope_override
+ void OnCheckAuthentication(User *, IdentifyRequest *req) override
{
- MD5Context context;
-
- context.Update(reinterpret_cast<const unsigned char *>(src.c_str()), src.length());
- context.Finalize();
-
- Encryption::Hash hash = context.GetFinalizedHash();
-
- Anope::string buf = "md5:" + Anope::Hex(reinterpret_cast<const char *>(hash.first), hash.second);
-
- Log(LOG_DEBUG_2) << "(enc_md5) hashed password from [" << src << "] to [" << buf << "]";
- dest = buf;
- return EVENT_ALLOW;
- }
-
- void OnCheckAuthentication(User *, IdentifyRequest *req) anope_override
- {
- const NickAlias *na = NickAlias::Find(req->GetAccount());
- if (na == NULL)
+ const auto *na = NickAlias::Find(req->GetAccount());
+ if (!na)
return;
- NickCore *nc = na->nc;
- size_t pos = nc->pass.find(':');
+ NickCore *nc = na->nc;
+ auto pos = nc->pass.find(':');
if (pos == Anope::string::npos)
return;
+
Anope::string hash_method(nc->pass.begin(), nc->pass.begin() + pos);
if (!hash_method.equals_cs("md5"))
return;
- Anope::string buf;
- this->OnEncrypt(req->GetPassword(), buf);
- if (nc->pass.equals_cs(buf))
+ auto enc = "md5:" + Anope::Hex(md5provider.Encrypt(req->GetPassword()));
+ if (nc->pass.equals_cs(enc))
{
- /* if we are NOT the first module in the list,
- * we want to re-encrypt the pass with the new encryption
- */
+ // If we are NOT the first encryption module we want to re-encrypt
+ // the password with the primary encryption method.
if (ModuleManager::FindFirstOf(ENCRYPTION) != this)
Anope::Encrypt(req->GetPassword(), nc->pass);
req->Success(this);
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