summaryrefslogtreecommitdiff
path: root/src/common/md5calc.cpp
diff options
context:
space:
mode:
authorBen Longbons <b.r.longbons@gmail.com>2012-08-30 16:16:25 -0700
committerBen Longbons <b.r.longbons@gmail.com>2012-08-30 17:03:31 -0700
commit41974ae5265fbc23a06f276f9e008d5dad020e0b (patch)
tree9d595215172e87e2d83b74f7bf3430b3040e780e /src/common/md5calc.cpp
parent21742909143df9159b2401c3e2a39cc0b2bad620 (diff)
downloadtmwa-41974ae5265fbc23a06f276f9e008d5dad020e0b.tar.gz
tmwa-41974ae5265fbc23a06f276f9e008d5dad020e0b.tar.bz2
tmwa-41974ae5265fbc23a06f276f9e008d5dad020e0b.tar.xz
tmwa-41974ae5265fbc23a06f276f9e008d5dad020e0b.zip
Rename files for C++ conversion. Does not compile.
After updating, you can remove these files, as shown in 'git status': Untracked files: (use "git add <file>..." to include in what will be committed) src/map/magic-interpreter-lexer.c src/map/magic-interpreter-parser.c src/map/magic-interpreter-parser.h
Diffstat (limited to 'src/common/md5calc.cpp')
-rw-r--r--src/common/md5calc.cpp339
1 files changed, 339 insertions, 0 deletions
diff --git a/src/common/md5calc.cpp b/src/common/md5calc.cpp
new file mode 100644
index 0000000..f00861d
--- /dev/null
+++ b/src/common/md5calc.cpp
@@ -0,0 +1,339 @@
+#include "md5calc.hpp"
+#include <string.h>
+#include "mt_rand.hpp"
+
+// auxilary data
+/*
+sin() constant table
+# Reformatted output of:
+echo 'scale=40; obase=16; for (i=1;i<=64;i++) print 2^32 * sin(i), "\n"' |
+bc | sed 's/^-//;s/^/0x/;s/\..*$/,/'
+*/
+static const uint32_t T[64] =
+{
+ // used by round 1
+ 0xd76aa478, 0xe8c7b756, 0x242070db, 0xc1bdceee, //0
+ 0xf57c0faf, 0x4787c62a, 0xa8304613, 0xfd469501, //4
+ 0x698098d8, 0x8b44f7af, 0xffff5bb1, 0x895cd7be, //8
+ 0x6b901122, 0xfd987193, 0xa679438e, 0x49b40821, //12
+ // used by round 2
+ 0xf61e2562, 0xc040b340, 0x265e5a51, 0xe9b6c7aa, //16
+ 0xd62f105d, 0x02441453, 0xd8a1e681, 0xe7d3fbc8, //20
+ 0x21e1cde6, 0xc33707d6, 0xf4d50d87, 0x455a14ed, //24
+ 0xa9e3e905, 0xfcefa3f8, 0x676f02d9, 0x8d2a4c8a, //28
+ // used by round 3
+ 0xfffa3942, 0x8771f681, 0x6d9d6122, 0xfde5380c, //32
+ 0xa4beea44, 0x4bdecfa9, 0xf6bb4b60, 0xbebfbc70, //36
+ 0x289b7ec6, 0xeaa127fa, 0xd4ef3085, 0x04881d05, //40
+ 0xd9d4d039, 0xe6db99e5, 0x1fa27cf8, 0xc4ac5665, //44
+ // used by round 4
+ 0xf4292244, 0x432aff97, 0xab9423a7, 0xfc93a039, //48
+ 0x655b59c3, 0x8f0ccc92, 0xffeff47d, 0x85845dd1, //52
+ 0x6fa87e4f, 0xfe2ce6e0, 0xa3014314, 0x4e0811a1, //56
+ 0xf7537e82, 0xbd3af235, 0x2ad7d2bb, 0xeb86d391, //60
+};
+
+// auxilary functions
+// note - the RFC defines these by non-CS conventions: or=v, and=(empty)
+static inline uint32_t rotate_left(uint32_t val, unsigned shift)
+{
+ return val << shift | val >> (32-shift);
+}
+
+static inline uint32_t F(uint32_t X, uint32_t Y, uint32_t Z)
+{
+ return (X & Y) | (~X & Z);
+}
+static inline uint32_t G(uint32_t X, uint32_t Y, uint32_t Z)
+{
+ return (X & Z) | (Y & ~Z);
+}
+static inline uint32_t H(uint32_t X, uint32_t Y, uint32_t Z)
+{
+ return X ^ Y ^ Z;
+}
+static inline uint32_t I(uint32_t X, uint32_t Y, uint32_t Z)
+{
+ return Y ^ (X | ~Z);
+}
+
+static const struct
+{
+ uint8_t k : 4;
+ uint8_t : 0;
+ uint8_t s : 5;
+// uint8_t i : 6; just increments constantly, from 1 .. 64 over all rounds
+}
+MD5_round1[16] =
+{
+ { 0, 7}, { 1, 12}, { 2, 17}, { 3, 22},
+ { 4, 7}, { 5, 12}, { 6, 17}, { 7, 22},
+ { 8, 7}, { 9, 12}, {10, 17}, {11, 22},
+ {12, 7}, {13, 12}, {14, 17}, {15, 22},
+},
+MD5_round2[16] =
+{
+ { 1, 5}, { 6, 9}, {11, 14}, { 0, 20},
+ { 5, 5}, {10, 9}, {15, 14}, { 4, 20},
+ { 9, 5}, {14, 9}, { 3, 14}, { 8, 20},
+ {13, 5}, { 2, 9}, { 7, 14}, {12, 20},
+},
+MD5_round3[16] =
+{
+ { 5, 4}, { 8, 11}, {11, 16}, {14, 23},
+ { 1, 4}, { 4, 11}, { 7, 16}, {10, 23},
+ {13, 4}, { 0, 11}, { 3, 16}, { 6, 23},
+ { 9, 4}, {12, 11}, {15, 16}, { 2, 23},
+},
+MD5_round4[16] =
+{
+ { 0, 6}, { 7, 10}, {14, 15}, { 5, 21},
+ {12, 6}, { 3, 10}, {10, 15}, { 1, 21},
+ { 8, 6}, {15, 10}, { 6, 15}, {13, 21},
+ { 4, 6}, {11, 10}, { 2, 15}, { 9, 21},
+};
+
+
+void MD5_init(MD5_state* state)
+{
+ // in the RFC, these are specified as bytes, interpreted as little-endian
+ state->val[0] = 0x67452301;
+ state->val[1] = 0xEFCDAB89;
+ state->val[2] = 0x98BADCFE;
+ state->val[3] = 0x10325476;
+}
+
+void MD5_do_block(MD5_state* state, MD5_block block)
+{
+#define X block.data
+#define a state->val[(16-i)%4]
+#define b state->val[(17-i)%4]
+#define c state->val[(18-i)%4]
+#define d state->val[(19-i)%4]
+ // save the values
+ const MD5_state saved = *state;
+ // round 1
+ for (int i=0; i<16; i++)
+ {
+#define k MD5_round1[i].k
+#define s MD5_round1[i].s
+ a = b + rotate_left(a + F(b,c,d) + X[k] + T[i+0x0], s);
+#undef k
+#undef s
+ }
+ // round 2
+ for (int i=0; i<16; i++)
+ {
+#define k MD5_round2[i].k
+#define s MD5_round2[i].s
+ a = b + rotate_left(a + G(b,c,d) + X[k] + T[i+0x10], s);
+#undef k
+#undef s
+ }
+ // round 3
+ for (int i=0; i<16; i++)
+ {
+#define k MD5_round3[i].k
+#define s MD5_round3[i].s
+ a = b + rotate_left(a + H(b,c,d) + X[k] + T[i+0x20], s);
+#undef k
+#undef s
+ }
+ // round 4
+ for (int i=0; i<16; i++)
+ {
+#define k MD5_round4[i].k
+#define s MD5_round4[i].s
+ a = b + rotate_left(a + I(b,c,d) + X[k] + T[i+0x30], s);
+#undef k
+#undef s
+ }
+ // adjust state based on original
+ state->val[0] += saved.val[0];
+ state->val[1] += saved.val[1];
+ state->val[2] += saved.val[2];
+ state->val[3] += saved.val[3];
+#undef a
+#undef b
+#undef c
+#undef d
+}
+
+void MD5_to_bin(MD5_state state, uint8_t out[0x10])
+{
+ for (int i=0; i<0x10; i++)
+ out[i] = state.val[i/4] >> 8*(i%4);
+}
+
+static const char hex[] = "0123456789abcdef";
+
+void MD5_to_str(MD5_state state, char out[0x21])
+{
+ uint8_t bin[16];
+ MD5_to_bin(state, bin);
+ for (int i=0; i<0x10; i++)
+ out[2*i] = hex[bin[i] >> 4],
+ out[2*i+1] = hex[bin[i] & 0xf];
+ out[0x20] = '\0';
+}
+
+MD5_state MD5_from_string(const char* msg, const size_t msglen)
+{
+ MD5_state state;
+ MD5_init(&state);
+ MD5_block block;
+ size_t rem = msglen;
+ while (rem >= 64)
+ {
+ for (int i=0; i<0x10; i++)
+ X[i] = msg[4*i+0] | msg[4*i+1]<<8 | msg[4*i+2]<<16 | msg[4*i+3]<<24;
+ MD5_do_block(&state, block);
+ msg += 64;
+ rem -= 64;
+ }
+ // now pad 1-512 bits + the 64-bit length - may be two blocks
+ uint8_t buf[0x40] = {};
+ memcpy (buf, msg, rem);
+ buf[rem] = 0x80; // a single one bit
+ if (64 - rem > 8)
+ {
+ for (int i=0; i<8; i++)
+ buf[0x38+i] = ((uint64_t)msglen*8) >> (i*8);
+ }
+ for (int i=0; i<0x10; i++)
+ X[i] = buf[4*i+0] | buf[4*i+1]<<8 | buf[4*i+2]<<16 | buf[4*i+3]<<24;
+ MD5_do_block(&state, block);
+ if (64 - rem <= 8)
+ {
+ memset(buf,'\0', 0x38);
+ for (int i=0; i<8; i++)
+ buf[0x38+i] = ((uint64_t)msglen*8) >> (i*8);
+ for (int i=0; i<0x10; i++)
+ X[i] = buf[4*i+0] | buf[4*i+1]<<8 | buf[4*i+2]<<16 | buf[4*i+3]<<24;
+ MD5_do_block(&state, block);
+ }
+ return state;
+}
+
+// This could be reimplemented without the strlen()
+MD5_state MD5_from_cstring(const char* msg)
+{
+ return MD5_from_string(msg, strlen(msg));
+}
+
+MD5_state MD5_from_FILE(FILE* in) {
+ uint64_t total_len = 0;
+
+ uint8_t buf[0x40];
+ uint8_t block_len = 0;
+
+ MD5_state state;
+ MD5_init(&state);
+
+ MD5_block block;
+
+ while (true)
+ {
+ size_t rv = fread(buf + block_len, 1, 0x40 - block_len, in);
+ if (!rv)
+ break;
+ total_len += 8*rv; // in bits
+ block_len += rv;
+ if (block_len != 0x40)
+ continue;
+ for (int i=0; i<0x10; i++)
+ X[i] = buf[4*i+0] | buf[4*i+1]<<8 | buf[4*i+2]<<16 | buf[4*i+3]<<24;
+ MD5_do_block(&state, block);
+ block_len = 0;
+ }
+ // no more input, just pad and append the length
+ buf[block_len] = 0x80;
+ memset(buf + block_len + 1, '\0', 0x40 - block_len - 1);
+ if (block_len < 0x38)
+ {
+ for (int i=0; i<8; i++)
+ buf[0x38+i] = total_len >> i*8;
+ }
+ for (int i=0; i<0x10; i++)
+ X[i] = buf[4*i+0] | buf[4*i+1]<<8 | buf[4*i+2]<<16 | buf[4*i+3]<<24;
+ MD5_do_block(&state, block);
+ if (0x38 <= block_len)
+ {
+ memset(buf, '\0', 0x38);
+ for (int i=0; i<8; i++)
+ buf[0x38+i] = total_len >> i*8;
+ for (int i=0; i<0x10; i++)
+ X[i] = buf[4*i+0] | buf[4*i+1]<<8 | buf[4*i+2]<<16 | buf[4*i+3]<<24;
+ MD5_do_block(&state, block);
+ }
+ return state;
+}
+
+
+// Hash a password with a salt.
+// Whoever wrote this FAILS programming
+const char *MD5_saltcrypt(const char *key, const char *salt)
+{
+ char buf[65];
+
+ // hash the key then the salt
+ // buf ends up as a 64-char NUL-terminated string
+ MD5_to_str(MD5_from_cstring(key), buf);
+ MD5_to_str(MD5_from_cstring(salt), buf+32);
+
+ // Hash the buffer back into sbuf - this is stupid
+ // (luckily, putting the result into itself is safe)
+ MD5_to_str(MD5_from_cstring(buf), buf+32);
+
+ static char obuf[33];
+ // This truncates the string, but we have to keep it like that for compatibility
+ snprintf(obuf, 32, "!%s$%s", salt, buf+32);
+ return obuf;
+}
+
+const char *make_salt(void) {
+ static char salt[6];
+ for (int i=0; i<5; i++)
+ salt[i] = MPRAND(48, 78);
+ return salt;
+}
+
+bool pass_ok(const char *password, const char *crypted) {
+ char buf[40];
+ strncpy(buf, crypted, 40);
+ char *salt = buf + 1;
+ *strchr(salt, '$') = '\0';
+
+ return !strcmp(crypted, MD5_saltcrypt(password, salt));
+}
+
+// [M|h]ashes up an IP address and a secret key
+// to return a hopefully unique masked IP.
+in_addr_t MD5_ip(char *secret, in_addr_t ip)
+{
+ char ipbuf[32];
+ uint8_t obuf[16];
+ union {
+ struct bytes {
+ uint8_t b1;
+ uint8_t b2;
+ uint8_t b3;
+ uint8_t b4;
+ } bytes;
+ in_addr_t ip;
+ } conv;
+
+ // MD5sum a secret + the IP address
+ memset(&ipbuf, 0, sizeof(ipbuf));
+ snprintf(ipbuf, sizeof(ipbuf), "%lu%s", (unsigned long)ip, secret);
+ /// TODO stop it from being a cstring
+ MD5_to_bin(MD5_from_cstring(ipbuf), obuf);
+
+ // Fold the md5sum to 32 bits, pack the bytes to an in_addr_t
+ conv.bytes.b1 = obuf[0] ^ obuf[1] ^ obuf[8] ^ obuf[9];
+ conv.bytes.b2 = obuf[2] ^ obuf[3] ^ obuf[10] ^ obuf[11];
+ conv.bytes.b3 = obuf[4] ^ obuf[5] ^ obuf[12] ^ obuf[13];
+ conv.bytes.b4 = obuf[6] ^ obuf[7] ^ obuf[14] ^ obuf[15];
+
+ return conv.ip;
+}