diff options
Diffstat (limited to 'modules/encryption/enc_md5.cpp')
| -rw-r--r-- | modules/encryption/enc_md5.cpp | 302 |
1 files changed, 19 insertions, 283 deletions
diff --git a/modules/encryption/enc_md5.cpp b/modules/encryption/enc_md5.cpp index a05e3aa13..69665f3bc 100644 --- a/modules/encryption/enc_md5.cpp +++ b/modules/encryption/enc_md5.cpp @@ -14,292 +14,29 @@ #include "module.h" #include "modules/encryption.h" -/* Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All -rights reserved. - -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 -}; +#include "md5/md5.c" 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 */ - - /* 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. - */ - static 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. - */ - static 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); - } +private: + MD5_CTX context; public: MD5Context() { - for (int i = 0; i < 4; ++i) - this->state[i] = md5_iv[i]; - - this->count[0] = this->count[1] = 0; - memset(this->buffer, 0, sizeof(this->buffer)); + MD5_Init(&context); } - /* 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) override { - 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_Update(&context, input, len); } - /* MD5 finalization. Ends an MD5 message-digest opera - * the message digest and zeroizing the context. - */ Anope::string Finalize() 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); - unsigned char digest[16]; /* final digest */ - /* 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)); - + unsigned char digest[16]; + MD5_Final(digest, &context); return Anope::string(reinterpret_cast<const char *>(&digest), sizeof(digest)); } }; @@ -321,34 +58,33 @@ public: EventReturn OnEncrypt(const Anope::string &src, Anope::string &dest) override { - Anope::string buf = "md5:" + Anope::Hex(md5provider.Encrypt(src)); - - Log(LOG_DEBUG_2) << "(enc_md5) hashed password from [" << src << "] to [" << buf << "]"; - dest = buf; + auto enc = "md5:" + Anope::Hex(md5provider.Encrypt(src)); + Log(LOG_DEBUG_2) << "(enc_md5) hashed password from [" << src << "] to [" << enc << "]"; + dest = enc; return EVENT_ALLOW; } void OnCheckAuthentication(User *, IdentifyRequest *req) override { - const NickAlias *na = NickAlias::Find(req->GetAccount()); + const auto *na = NickAlias::Find(req->GetAccount()); if (na == NULL) 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)) + Anope::string enc; + this->OnEncrypt(req->GetPassword(), enc); + 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); |