diff options
Diffstat (limited to 'gst/librfb')
| -rw-r--r-- | gst/librfb/Makefile.am | 8 | ||||
| -rw-r--r-- | gst/librfb/d3des.c | 477 | ||||
| -rw-r--r-- | gst/librfb/d3des.h | 52 | ||||
| -rw-r--r-- | gst/librfb/rfbdecoder.c | 47 | ||||
| -rw-r--r-- | gst/librfb/vncauth.c | 166 | ||||
| -rw-r--r-- | gst/librfb/vncauth.h | 31 |
6 files changed, 776 insertions, 5 deletions
diff --git a/gst/librfb/Makefile.am b/gst/librfb/Makefile.am index 74dbfbc7b..626dc5b41 100644 --- a/gst/librfb/Makefile.am +++ b/gst/librfb/Makefile.am @@ -11,7 +11,9 @@ libgstrfbsrc_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS) librfb_la_SOURCES = \ rfbbuffer.c \ rfbdecoder.c \ - rfbbytestream.c + rfbbytestream.c \ + d3des.c \ + vncauth.c librfb_la_CFLAGS = $(GST_CFLAGS) -I$(srcdir)/.. librfb_la_LIBADD = $(GLIB_LIBS) @@ -22,4 +24,6 @@ noinst_HEADERS = \ rfbbytestream.h \ rfbcontext.h \ rfbutil.h \ - gstrfbsrc.h + gstrfbsrc.h \ + d3des.h \ + vncauth.h diff --git a/gst/librfb/d3des.c b/gst/librfb/d3des.c new file mode 100644 index 000000000..0200573a1 --- /dev/null +++ b/gst/librfb/d3des.c @@ -0,0 +1,477 @@ +/* + * This is D3DES (V5.09) by Richard Outerbridge with the double and + * triple-length support removed for use in VNC. Also the bytebit[] array + * has been reversed so that the most significant bit in each byte of the + * key is ignored, not the least significant. + * + * These changes are: + * Copyright (C) 1999 AT&T Laboratories Cambridge. All Rights Reserved. + * + * This software is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + */ + +/* D3DES (V5.09) - + * + * A portable, public domain, version of the Data Encryption Standard. + * + * Written with Symantec's THINK (Lightspeed) C by Richard Outerbridge. + * Thanks to: Dan Hoey for his excellent Initial and Inverse permutation + * code; Jim Gillogly & Phil Karn for the DES key schedule code; Dennis + * Ferguson, Eric Young and Dana How for comparing notes; and Ray Lau, + * for humouring me on. + * + * Copyright (c) 1988,1989,1990,1991,1992 by Richard Outerbridge. + * (GEnie : OUTER; CIS : [71755,204]) Graven Imagery, 1992. + */ + +#include "config.h" +#include "stdint.h" + +#include "d3des.h" + +static void scrunch (unsigned char *, unsigned long *); +static void unscrun (unsigned long *, unsigned char *); +static void desfunc (unsigned long *, unsigned long *); +static void cookey (unsigned long *); + +static unsigned long KnL[32] = { 0L }; + +//static unsigned long KnR[32] = { 0L }; +//static unsigned long Kn3[32] = { 0L }; +/* + * static unsigned char Df_Key[24] = { + * 0x01,0x23,0x45,0x67,0x89,0xab,0xcd,0xef, + * 0xfe,0xdc,0xba,0x98,0x76,0x54,0x32,0x10, + * 0x89,0xab,0xcd,0xef,0x01,0x23,0x45,0x67 }; + */ + +static uint16_t bytebit[8] = { + 01, 02, 04, 010, 020, 040, 0100, 0200 +}; + +static unsigned long bigbyte[24] = { + 0x800000L, 0x400000L, 0x200000L, 0x100000L, + 0x80000L, 0x40000L, 0x20000L, 0x10000L, + 0x8000L, 0x4000L, 0x2000L, 0x1000L, + 0x800L, 0x400L, 0x200L, 0x100L, + 0x80L, 0x40L, 0x20L, 0x10L, + 0x8L, 0x4L, 0x2L, 0x1L +}; + +/* Use the key schedule specified in the Standard (ANSI X3.92-1981). */ + +static unsigned char pc1[56] = { + 56, 48, 40, 32, 24, 16, 8, 0, 57, 49, 41, 33, 25, 17, + 9, 1, 58, 50, 42, 34, 26, 18, 10, 2, 59, 51, 43, 35, + 62, 54, 46, 38, 30, 22, 14, 6, 61, 53, 45, 37, 29, 21, + 13, 5, 60, 52, 44, 36, 28, 20, 12, 4, 27, 19, 11, 3 +}; + +static unsigned char totrot[16] = { + 1, 2, 4, 6, 8, 10, 12, 14, 15, 17, 19, 21, 23, 25, 27, 28 +}; + +static unsigned char pc2[48] = { + 13, 16, 10, 23, 0, 4, 2, 27, 14, 5, 20, 9, + 22, 18, 11, 3, 25, 7, 15, 6, 26, 19, 12, 1, + 40, 51, 30, 36, 46, 54, 29, 39, 50, 44, 32, 47, + 43, 48, 38, 55, 33, 52, 45, 41, 49, 35, 28, 31 +}; + +void +deskey (key, edf) /* Thanks to James Gillogly & Phil Karn! */ + unsigned char *key; + int32_t edf; +{ + register int32_t i, j, l, m, n; + unsigned char pc1m[56], pcr[56]; + unsigned long kn[32]; + + for (j = 0; j < 56; j++) { + l = pc1[j]; + m = l & 07; + pc1m[j] = (key[l >> 3] & bytebit[m]) ? 1 : 0; + } + for (i = 0; i < 16; i++) { + if (edf == DE1) + m = (15 - i) << 1; + else + m = i << 1; + n = m + 1; + kn[m] = kn[n] = 0L; + for (j = 0; j < 28; j++) { + l = j + totrot[i]; + if (l < 28) + pcr[j] = pc1m[l]; + else + pcr[j] = pc1m[l - 28]; + } + for (j = 28; j < 56; j++) { + l = j + totrot[i]; + if (l < 56) + pcr[j] = pc1m[l]; + else + pcr[j] = pc1m[l - 28]; + } + for (j = 0; j < 24; j++) { + if (pcr[pc2[j]]) + kn[m] |= bigbyte[j]; + if (pcr[pc2[j + 24]]) + kn[n] |= bigbyte[j]; + } + } + cookey (kn); + return; +} + +static void +cookey (raw1) + register unsigned long *raw1; +{ + register unsigned long *cook, *raw0; + unsigned long dough[32]; + register int32_t i; + + cook = dough; + for (i = 0; i < 16; i++, raw1++) { + raw0 = raw1++; + *cook = (*raw0 & 0x00fc0000L) << 6; + *cook |= (*raw0 & 0x00000fc0L) << 10; + *cook |= (*raw1 & 0x00fc0000L) >> 10; + *cook++ |= (*raw1 & 0x00000fc0L) >> 6; + *cook = (*raw0 & 0x0003f000L) << 12; + *cook |= (*raw0 & 0x0000003fL) << 16; + *cook |= (*raw1 & 0x0003f000L) >> 4; + *cook++ |= (*raw1 & 0x0000003fL); + } + usekey (dough); + return; +} + +void +cpkey (into) + register unsigned long *into; +{ + register unsigned long *from, *endp; + + from = KnL, endp = &KnL[32]; + while (from < endp) + *into++ = *from++; + return; +} + +void +usekey (from) + register unsigned long *from; +{ + register unsigned long *to, *endp; + + to = KnL, endp = &KnL[32]; + while (to < endp) + *to++ = *from++; + return; +} + +void +des (inblock, outblock) + unsigned char *inblock, *outblock; +{ + unsigned long work[2]; + + scrunch (inblock, work); + desfunc (work, KnL); + unscrun (work, outblock); + return; +} + +static void +scrunch (outof, into) + register unsigned char *outof; + register unsigned long *into; +{ + *into = (*outof++ & 0xffL) << 24; + *into |= (*outof++ & 0xffL) << 16; + *into |= (*outof++ & 0xffL) << 8; + *into++ |= (*outof++ & 0xffL); + *into = (*outof++ & 0xffL) << 24; + *into |= (*outof++ & 0xffL) << 16; + *into |= (*outof++ & 0xffL) << 8; + *into |= (*outof & 0xffL); + return; +} + +static void +unscrun (outof, into) + register unsigned long *outof; + register unsigned char *into; +{ + *into++ = (*outof >> 24) & 0xffL; + *into++ = (*outof >> 16) & 0xffL; + *into++ = (*outof >> 8) & 0xffL; + *into++ = *outof++ & 0xffL; + *into++ = (*outof >> 24) & 0xffL; + *into++ = (*outof >> 16) & 0xffL; + *into++ = (*outof >> 8) & 0xffL; + *into = *outof & 0xffL; + return; +} + +static unsigned long SP1[64] = { + 0x01010400L, 0x00000000L, 0x00010000L, 0x01010404L, + 0x01010004L, 0x00010404L, 0x00000004L, 0x00010000L, + 0x00000400L, 0x01010400L, 0x01010404L, 0x00000400L, + 0x01000404L, 0x01010004L, 0x01000000L, 0x00000004L, + 0x00000404L, 0x01000400L, 0x01000400L, 0x00010400L, + 0x00010400L, 0x01010000L, 0x01010000L, 0x01000404L, + 0x00010004L, 0x01000004L, 0x01000004L, 0x00010004L, + 0x00000000L, 0x00000404L, 0x00010404L, 0x01000000L, + 0x00010000L, 0x01010404L, 0x00000004L, 0x01010000L, + 0x01010400L, 0x01000000L, 0x01000000L, 0x00000400L, + 0x01010004L, 0x00010000L, 0x00010400L, 0x01000004L, + 0x00000400L, 0x00000004L, 0x01000404L, 0x00010404L, + 0x01010404L, 0x00010004L, 0x01010000L, 0x01000404L, + 0x01000004L, 0x00000404L, 0x00010404L, 0x01010400L, + 0x00000404L, 0x01000400L, 0x01000400L, 0x00000000L, + 0x00010004L, 0x00010400L, 0x00000000L, 0x01010004L +}; + +static unsigned long SP2[64] = { + 0x80108020L, 0x80008000L, 0x00008000L, 0x00108020L, + 0x00100000L, 0x00000020L, 0x80100020L, 0x80008020L, + 0x80000020L, 0x80108020L, 0x80108000L, 0x80000000L, + 0x80008000L, 0x00100000L, 0x00000020L, 0x80100020L, + 0x00108000L, 0x00100020L, 0x80008020L, 0x00000000L, + 0x80000000L, 0x00008000L, 0x00108020L, 0x80100000L, + 0x00100020L, 0x80000020L, 0x00000000L, 0x00108000L, + 0x00008020L, 0x80108000L, 0x80100000L, 0x00008020L, + 0x00000000L, 0x00108020L, 0x80100020L, 0x00100000L, + 0x80008020L, 0x80100000L, 0x80108000L, 0x00008000L, + 0x80100000L, 0x80008000L, 0x00000020L, 0x80108020L, + 0x00108020L, 0x00000020L, 0x00008000L, 0x80000000L, + 0x00008020L, 0x80108000L, 0x00100000L, 0x80000020L, + 0x00100020L, 0x80008020L, 0x80000020L, 0x00100020L, + 0x00108000L, 0x00000000L, 0x80008000L, 0x00008020L, + 0x80000000L, 0x80100020L, 0x80108020L, 0x00108000L +}; + +static unsigned long SP3[64] = { + 0x00000208L, 0x08020200L, 0x00000000L, 0x08020008L, + 0x08000200L, 0x00000000L, 0x00020208L, 0x08000200L, + 0x00020008L, 0x08000008L, 0x08000008L, 0x00020000L, + 0x08020208L, 0x00020008L, 0x08020000L, 0x00000208L, + 0x08000000L, 0x00000008L, 0x08020200L, 0x00000200L, + 0x00020200L, 0x08020000L, 0x08020008L, 0x00020208L, + 0x08000208L, 0x00020200L, 0x00020000L, 0x08000208L, + 0x00000008L, 0x08020208L, 0x00000200L, 0x08000000L, + 0x08020200L, 0x08000000L, 0x00020008L, 0x00000208L, + 0x00020000L, 0x08020200L, 0x08000200L, 0x00000000L, + 0x00000200L, 0x00020008L, 0x08020208L, 0x08000200L, + 0x08000008L, 0x00000200L, 0x00000000L, 0x08020008L, + 0x08000208L, 0x00020000L, 0x08000000L, 0x08020208L, + 0x00000008L, 0x00020208L, 0x00020200L, 0x08000008L, + 0x08020000L, 0x08000208L, 0x00000208L, 0x08020000L, + 0x00020208L, 0x00000008L, 0x08020008L, 0x00020200L +}; + +static unsigned long SP4[64] = { + 0x00802001L, 0x00002081L, 0x00002081L, 0x00000080L, + 0x00802080L, 0x00800081L, 0x00800001L, 0x00002001L, + 0x00000000L, 0x00802000L, 0x00802000L, 0x00802081L, + 0x00000081L, 0x00000000L, 0x00800080L, 0x00800001L, + 0x00000001L, 0x00002000L, 0x00800000L, 0x00802001L, + 0x00000080L, 0x00800000L, 0x00002001L, 0x00002080L, + 0x00800081L, 0x00000001L, 0x00002080L, 0x00800080L, + 0x00002000L, 0x00802080L, 0x00802081L, 0x00000081L, + 0x00800080L, 0x00800001L, 0x00802000L, 0x00802081L, + 0x00000081L, 0x00000000L, 0x00000000L, 0x00802000L, + 0x00002080L, 0x00800080L, 0x00800081L, 0x00000001L, + 0x00802001L, 0x00002081L, 0x00002081L, 0x00000080L, + 0x00802081L, 0x00000081L, 0x00000001L, 0x00002000L, + 0x00800001L, 0x00002001L, 0x00802080L, 0x00800081L, + 0x00002001L, 0x00002080L, 0x00800000L, 0x00802001L, + 0x00000080L, 0x00800000L, 0x00002000L, 0x00802080L +}; + +static unsigned long SP5[64] = { + 0x00000100L, 0x02080100L, 0x02080000L, 0x42000100L, + 0x00080000L, 0x00000100L, 0x40000000L, 0x02080000L, + 0x40080100L, 0x00080000L, 0x02000100L, 0x40080100L, + 0x42000100L, 0x42080000L, 0x00080100L, 0x40000000L, + 0x02000000L, 0x40080000L, 0x40080000L, 0x00000000L, + 0x40000100L, 0x42080100L, 0x42080100L, 0x02000100L, + 0x42080000L, 0x40000100L, 0x00000000L, 0x42000000L, + 0x02080100L, 0x02000000L, 0x42000000L, 0x00080100L, + 0x00080000L, 0x42000100L, 0x00000100L, 0x02000000L, + 0x40000000L, 0x02080000L, 0x42000100L, 0x40080100L, + 0x02000100L, 0x40000000L, 0x42080000L, 0x02080100L, + 0x40080100L, 0x00000100L, 0x02000000L, 0x42080000L, + 0x42080100L, 0x00080100L, 0x42000000L, 0x42080100L, + 0x02080000L, 0x00000000L, 0x40080000L, 0x42000000L, + 0x00080100L, 0x02000100L, 0x40000100L, 0x00080000L, + 0x00000000L, 0x40080000L, 0x02080100L, 0x40000100L +}; + +static unsigned long SP6[64] = { + 0x20000010L, 0x20400000L, 0x00004000L, 0x20404010L, + 0x20400000L, 0x00000010L, 0x20404010L, 0x00400000L, + 0x20004000L, 0x00404010L, 0x00400000L, 0x20000010L, + 0x00400010L, 0x20004000L, 0x20000000L, 0x00004010L, + 0x00000000L, 0x00400010L, 0x20004010L, 0x00004000L, + 0x00404000L, 0x20004010L, 0x00000010L, 0x20400010L, + 0x20400010L, 0x00000000L, 0x00404010L, 0x20404000L, + 0x00004010L, 0x00404000L, 0x20404000L, 0x20000000L, + 0x20004000L, 0x00000010L, 0x20400010L, 0x00404000L, + 0x20404010L, 0x00400000L, 0x00004010L, 0x20000010L, + 0x00400000L, 0x20004000L, 0x20000000L, 0x00004010L, + 0x20000010L, 0x20404010L, 0x00404000L, 0x20400000L, + 0x00404010L, 0x20404000L, 0x00000000L, 0x20400010L, + 0x00000010L, 0x00004000L, 0x20400000L, 0x00404010L, + 0x00004000L, 0x00400010L, 0x20004010L, 0x00000000L, + 0x20404000L, 0x20000000L, 0x00400010L, 0x20004010L +}; + +static unsigned long SP7[64] = { + 0x00200000L, 0x04200002L, 0x04000802L, 0x00000000L, + 0x00000800L, 0x04000802L, 0x00200802L, 0x04200800L, + 0x04200802L, 0x00200000L, 0x00000000L, 0x04000002L, + 0x00000002L, 0x04000000L, 0x04200002L, 0x00000802L, + 0x04000800L, 0x00200802L, 0x00200002L, 0x04000800L, + 0x04000002L, 0x04200000L, 0x04200800L, 0x00200002L, + 0x04200000L, 0x00000800L, 0x00000802L, 0x04200802L, + 0x00200800L, 0x00000002L, 0x04000000L, 0x00200800L, + 0x04000000L, 0x00200800L, 0x00200000L, 0x04000802L, + 0x04000802L, 0x04200002L, 0x04200002L, 0x00000002L, + 0x00200002L, 0x04000000L, 0x04000800L, 0x00200000L, + 0x04200800L, 0x00000802L, 0x00200802L, 0x04200800L, + 0x00000802L, 0x04000002L, 0x04200802L, 0x04200000L, + 0x00200800L, 0x00000000L, 0x00000002L, 0x04200802L, + 0x00000000L, 0x00200802L, 0x04200000L, 0x00000800L, + 0x04000002L, 0x04000800L, 0x00000800L, 0x00200002L +}; + +static unsigned long SP8[64] = { + 0x10001040L, 0x00001000L, 0x00040000L, 0x10041040L, + 0x10000000L, 0x10001040L, 0x00000040L, 0x10000000L, + 0x00040040L, 0x10040000L, 0x10041040L, 0x00041000L, + 0x10041000L, 0x00041040L, 0x00001000L, 0x00000040L, + 0x10040000L, 0x10000040L, 0x10001000L, 0x00001040L, + 0x00041000L, 0x00040040L, 0x10040040L, 0x10041000L, + 0x00001040L, 0x00000000L, 0x00000000L, 0x10040040L, + 0x10000040L, 0x10001000L, 0x00041040L, 0x00040000L, + 0x00041040L, 0x00040000L, 0x10041000L, 0x00001000L, + 0x00000040L, 0x10040040L, 0x00001000L, 0x00041040L, + 0x10001000L, 0x00000040L, 0x10000040L, 0x10040000L, + 0x10040040L, 0x10000000L, 0x00040000L, 0x10001040L, + 0x00000000L, 0x10041040L, 0x00040040L, 0x10000040L, + 0x10040000L, 0x10001000L, 0x10001040L, 0x00000000L, + 0x10041040L, 0x00041000L, 0x00041000L, 0x00001040L, + 0x00001040L, 0x00040040L, 0x10000000L, 0x10041000L +}; + +static void +desfunc (block, keys) + register unsigned long *block, *keys; +{ + register unsigned long fval, work, right, leftt; + register int32_t round; + + leftt = block[0]; + right = block[1]; + work = ((leftt >> 4) ^ right) & 0x0f0f0f0fL; + right ^= work; + leftt ^= (work << 4); + work = ((leftt >> 16) ^ right) & 0x0000ffffL; + right ^= work; + leftt ^= (work << 16); + work = ((right >> 2) ^ leftt) & 0x33333333L; + leftt ^= work; + right ^= (work << 2); + work = ((right >> 8) ^ leftt) & 0x00ff00ffL; + leftt ^= work; + right ^= (work << 8); + right = ((right << 1) | ((right >> 31) & 1L)) & 0xffffffffL; + work = (leftt ^ right) & 0xaaaaaaaaL; + leftt ^= work; + right ^= work; + leftt = ((leftt << 1) | ((leftt >> 31) & 1L)) & 0xffffffffL; + + for (round = 0; round < 8; round++) { + work = (right << 28) | (right >> 4); + work ^= *keys++; + fval = SP7[work & 0x3fL]; + fval |= SP5[(work >> 8) & 0x3fL]; + fval |= SP3[(work >> 16) & 0x3fL]; + fval |= SP1[(work >> 24) & 0x3fL]; + work = right ^ *keys++; + fval |= SP8[work & 0x3fL]; + fval |= SP6[(work >> 8) & 0x3fL]; + fval |= SP4[(work >> 16) & 0x3fL]; + fval |= SP2[(work >> 24) & 0x3fL]; + leftt ^= fval; + work = (leftt << 28) | (leftt >> 4); + work ^= *keys++; + fval = SP7[work & 0x3fL]; + fval |= SP5[(work >> 8) & 0x3fL]; + fval |= SP3[(work >> 16) & 0x3fL]; + fval |= SP1[(work >> 24) & 0x3fL]; + work = leftt ^ *keys++; + fval |= SP8[work & 0x3fL]; + fval |= SP6[(work >> 8) & 0x3fL]; + fval |= SP4[(work >> 16) & 0x3fL]; + fval |= SP2[(work >> 24) & 0x3fL]; + right ^= fval; + } + + right = (right << 31) | (right >> 1); + work = (leftt ^ right) & 0xaaaaaaaaL; + leftt ^= work; + right ^= work; + leftt = (leftt << 31) | (leftt >> 1); + work = ((leftt >> 8) ^ right) & 0x00ff00ffL; + right ^= work; + leftt ^= (work << 8); + work = ((leftt >> 2) ^ right) & 0x33333333L; + right ^= work; + leftt ^= (work << 2); + work = ((right >> 16) ^ leftt) & 0x0000ffffL; + leftt ^= work; + right ^= (work << 16); + work = ((right >> 4) ^ leftt) & 0x0f0f0f0fL; + leftt ^= work; + right ^= (work << 4); + *block++ = right; + *block = leftt; + return; +} + +/* Validation sets: + * + * Single-length key, single-length plaintext - + * Key : 0123 4567 89ab cdef + * Plain : 0123 4567 89ab cde7 + * Cipher : c957 4425 6a5e d31d + * + * Double-length key, single-length plaintext - + * Key : 0123 4567 89ab cdef fedc ba98 7654 3210 + * Plain : 0123 4567 89ab cde7 + * Cipher : 7f1d 0a77 826b 8aff + * + * Double-length key, double-length plaintext - + * Key : 0123 4567 89ab cdef fedc ba98 7654 3210 + * Plain : 0123 4567 89ab cdef 0123 4567 89ab cdff + * Cipher : 27a0 8440 406a df60 278f 47cf 42d6 15d7 + * + * Triple-length key, single-length plaintext - + * Key : 0123 4567 89ab cdef fedc ba98 7654 3210 89ab cdef 0123 4567 + * Plain : 0123 4567 89ab cde7 + * Cipher : de0b 7c06 ae5e 0ed5 + * + * Triple-length key, double-length plaintext - + * Key : 0123 4567 89ab cdef fedc ba98 7654 3210 89ab cdef 0123 4567 + * Plain : 0123 4567 89ab cdef 0123 4567 89ab cdff + * Cipher : ad0d 1b30 ac17 cf07 0ed1 1c63 81e4 4de5 + * + * d3des V5.0a rwo 9208.07 18:44 Graven Imagery + **********************************************************************/ diff --git a/gst/librfb/d3des.h b/gst/librfb/d3des.h new file mode 100644 index 000000000..e647fc12c --- /dev/null +++ b/gst/librfb/d3des.h @@ -0,0 +1,52 @@ +/* + * This is D3DES (V5.09) by Richard Outerbridge with the double and + * triple-length support removed for use in VNC. + * + * These changes are: + * Copyright (C) 1999 AT&T Laboratories Cambridge. All Rights Reserved. + * + * This software is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + */ + +/* d3des.h - + * + * Headers and defines for d3des.c + * Graven Imagery, 1992. + * + * Copyright (c) 1988,1989,1990,1991,1992 by Richard Outerbridge + * (GEnie : OUTER; CIS : [71755,204]) + */ + +#define EN0 0 /* MODE == encrypt */ +#define DE1 1 /* MODE == decrypt */ + +extern void deskey(unsigned char *, int); +/* hexkey[8] MODE + * Sets the internal key register according to the hexadecimal + * key contained in the 8 bytes of hexkey, according to the DES, + * for encryption or decryption according to MODE. + */ + +extern void usekey(unsigned long *); +/* cookedkey[32] + * Loads the internal key register with the data in cookedkey. + */ + +extern void cpkey(unsigned long *); +/* cookedkey[32] + * Copies the contents of the internal key register into the storage + * located at &cookedkey[0]. + */ + +extern void des(unsigned char *, unsigned char *); +/* from[8] to[8] + * Encrypts/Decrypts (according to the key currently loaded in the + * internal key register) one block of eight bytes at address 'from' + * into the block at address 'to'. They can be the same. + */ + +/* d3des.h V5.09 rwo 9208.04 15:06 Graven Imagery + ********************************************************************/ + diff --git a/gst/librfb/rfbdecoder.c b/gst/librfb/rfbdecoder.c index eedfefcee..6f6050ff1 100644 --- a/gst/librfb/rfbdecoder.c +++ b/gst/librfb/rfbdecoder.c @@ -13,6 +13,8 @@ #include <arpa/inet.h> #include <errno.h> +#include "vncauth.h" + #define RFB_GET_UINT32(ptr) GUINT32_FROM_BE (*(guint32 *)(ptr)) #define RFB_GET_UINT16(ptr) GUINT16_FROM_BE (*(guint16 *)(ptr)) #define RFB_GET_UINT8(ptr) (*(guint8 *)(ptr)) @@ -39,6 +41,7 @@ static gboolean rfb_decoder_state_send_client_initialisation (RfbDecoder * decoder); static gboolean rfb_decoder_state_wait_for_server_initialisation (RfbDecoder * decoder); +static gboolean rfb_decoder_state_security_result (RfbDecoder * decoder); static gboolean rfb_decoder_state_normal (RfbDecoder * decoder); static gboolean rfb_decoder_state_framebuffer_update (RfbDecoder * decoder); static gboolean rfb_decoder_state_framebuffer_update_rectangle (RfbDecoder * @@ -279,8 +282,7 @@ rfb_decoder_state_wait_for_security (RfbDecoder * decoder) */ if (decoder->protocol_major == 3 && decoder->protocol_minor == 3) { ret = rfb_bytestream_read (decoder->bytestream, &buffer, 4); - if (ret < 4) - return FALSE; + g_return_val_if_fail (ret == 4, FALSE); decoder->security_type = RFB_GET_UINT32 (buffer->data); GST_DEBUG ("security = %d", decoder->security_type); @@ -294,15 +296,54 @@ rfb_decoder_state_wait_for_security (RfbDecoder * decoder) switch (decoder->security_type) { case SECURITY_NONE: GST_DEBUG ("Security type is None"); + /* \TODO version 3.8 goes to the security result */ + decoder->state = rfb_decoder_state_send_client_initialisation; break; case SECURITY_VNC: + /** + * VNC authentication is to be used and protocol data is to be sent unencrypted. The + * server sends a random 16-byte challenge + */ GST_DEBUG ("Security type is VNC Authentication"); - /* \TODO Check if for the correct password */ + + ret = rfb_bytestream_read (decoder->bytestream, &buffer, 16); + g_return_val_if_fail (ret == 16, FALSE); + vncEncryptBytes ((unsigned char *) buffer->data, "testtest"); + rfb_decoder_send (decoder, buffer->data, 16); + + GST_DEBUG ("Encrypted challenge send to server"); + + decoder->state = rfb_decoder_state_security_result; break; default: + GST_INFO ("Security type is not known"); + return FALSE; break; } + return TRUE; +} + +/** + * The server sends a word to inform the client whether the security handshaking was + * successful. + */ +static gboolean +rfb_decoder_state_security_result (RfbDecoder * decoder) +{ + RfbBuffer *buffer; + gint ret; + + ret = rfb_bytestream_read (decoder->bytestream, &buffer, 4); + g_return_val_if_fail (ret == 4, FALSE); + if (RFB_GET_UINT32 (buffer->data) != 0) { + GST_INFO ("Security handshaking failed"); + /* \TODO version 3.8 gives a reason why it failed */ + return FALSE; + } + + GST_DEBUG ("Security handshaking succesfull"); decoder->state = rfb_decoder_state_send_client_initialisation; + return TRUE; } diff --git a/gst/librfb/vncauth.c b/gst/librfb/vncauth.c new file mode 100644 index 000000000..19083088d --- /dev/null +++ b/gst/librfb/vncauth.c @@ -0,0 +1,166 @@ +/* + * Copyright (C) 1999 AT&T Laboratories Cambridge. All Rights Reserved. + * + * This is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This software is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, + * USA. + */ + +/* + * vncauth.c - Functions for VNC password management and authentication. + */ + +#include "config.h" +#include "stdint.h" +#include "stdio.h" +#include "stdlib.h" +#include "string.h" +#include "time.h" +#include "vncauth.h" +#include "d3des.h" + +#include "sys/stat.h" + + +/* + * We use a fixed key to store passwords, since we assume that our local + * file system is secure but nonetheless don't want to store passwords + * as plaintext. + */ + +unsigned char fixedkey[8] = { 23, 82, 107, 6, 35, 78, 88, 7 }; + + +/* + * Encrypt a password and store it in a file. Returns 0 if successful, + * 1 if the file could not be written. + */ + +int32_t +vncEncryptAndStorePasswd (char *passwd, char *fname) +{ + FILE *fp; + uint32_t i; + unsigned char encryptedPasswd[8]; + + if ((fp = fopen (fname, "w")) == NULL) + return 1; + + chmod (fname, S_IRUSR | S_IWUSR); + + /* pad password with nulls */ + + for (i = 0; i < 8; i++) { + if (i < strlen (passwd)) { + encryptedPasswd[i] = passwd[i]; + } else { + encryptedPasswd[i] = 0; + } + } + + /* Do encryption in-place - this way we overwrite our copy of the plaintext + password */ + + deskey (fixedkey, EN0); + des (encryptedPasswd, encryptedPasswd); + + for (i = 0; i < 8; i++) { + putc (encryptedPasswd[i], fp); + } + + fclose (fp); + return 0; +} + + +/* + * Decrypt a password from a file. Returns a pointer to a newly allocated + * string containing the password or a null pointer if the password could + * not be retrieved for some reason. + */ + +char * +vncDecryptPasswdFromFile (char *fname) +{ + FILE *fp; + int32_t i, ch; + unsigned char *passwd = (unsigned char *) malloc (9); + + if ((fp = fopen (fname, "r")) == NULL) + return NULL; + + for (i = 0; i < 8; i++) { + ch = getc (fp); + if (ch == EOF) { + fclose (fp); + return NULL; + } + passwd[i] = ch; + } + + fclose (fp); + + deskey (fixedkey, DE1); + des (passwd, passwd); + + passwd[8] = 0; + + return (char *) passwd; +} + + +/* + * Generate CHALLENGESIZE random bytes for use in challenge-response + * authentication. + */ + +void +vncRandomBytes (unsigned char *bytes) +{ + int32_t i; + uint32_t seed = (uint32_t) time (0); + + srandom (seed); + for (i = 0; i < CHALLENGESIZE; i++) { + bytes[i] = (unsigned char) (random () & 255); + } +} + + +/* + * Encrypt CHALLENGESIZE bytes in memory using a password. + */ + +void +vncEncryptBytes (unsigned char *bytes, char *passwd) +{ + unsigned char key[8]; + uint32_t i; + + /* key is simply password padded with nulls */ + + for (i = 0; i < 8; i++) { + if (i < strlen (passwd)) { + key[i] = passwd[i]; + } else { + key[i] = 0; + } + } + + deskey (key, EN0); + + for (i = 0; i < CHALLENGESIZE; i += 8) { + des (bytes + i, bytes + i); + } +} diff --git a/gst/librfb/vncauth.h b/gst/librfb/vncauth.h new file mode 100644 index 000000000..2a4deaebc --- /dev/null +++ b/gst/librfb/vncauth.h @@ -0,0 +1,31 @@ +/* + * Copyright (C) 1999 AT&T Laboratories Cambridge. All Rights Reserved. + * + * This is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This software is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this software; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, + * USA. + */ + +/* + * vncauth.h - describes the functions provided by the vncauth library. + */ + +#define MAXPWLEN 8 +#define CHALLENGESIZE 16 + +extern int vncEncryptAndStorePasswd(char *passwd, char *fname); +extern char *vncDecryptPasswdFromFile(char *fname); +extern void vncRandomBytes(unsigned char *bytes); +extern void vncEncryptBytes(unsigned char *bytes, char *passwd); + |