diff options
Diffstat (limited to 'source4/libcli/auth')
| -rw-r--r-- | source4/libcli/auth/config.mk | 3 | ||||
| -rw-r--r-- | source4/libcli/auth/credentials.c | 1 | ||||
| -rw-r--r-- | source4/libcli/auth/session.c | 1 | ||||
| -rw-r--r-- | source4/libcli/auth/smbdes.c | 381 |
4 files changed, 385 insertions, 1 deletions
diff --git a/source4/libcli/auth/config.mk b/source4/libcli/auth/config.mk index 26e6913c18..3f036fbfd4 100644 --- a/source4/libcli/auth/config.mk +++ b/source4/libcli/auth/config.mk @@ -5,7 +5,8 @@ PUBLIC_HEADERS = credentials.h PRIVATE_PROTO_HEADER = proto.h OBJ_FILES = credentials.o \ session.o \ - smbencrypt.o + smbencrypt.o \ + smbdes.o REQUIRED_SUBSYSTEMS = \ auth SCHANNELDB MSRPC_PARSE # End SUBSYSTEM LIBCLI_AUTH diff --git a/source4/libcli/auth/credentials.c b/source4/libcli/auth/credentials.c index 3f055a657d..5bae30f580 100644 --- a/source4/libcli/auth/credentials.c +++ b/source4/libcli/auth/credentials.c @@ -25,6 +25,7 @@ #include "system/time.h" #include "auth/auth.h" #include "lib/crypto/crypto.h" +#include "libcli/auth/libcli_auth.h" /* initialise the credentials state for old-style 64 bit session keys diff --git a/source4/libcli/auth/session.c b/source4/libcli/auth/session.c index 22146cbfb3..afa7afbd0f 100644 --- a/source4/libcli/auth/session.c +++ b/source4/libcli/auth/session.c @@ -21,6 +21,7 @@ */ #include "includes.h" +#include "libcli/auth/libcli_auth.h" /* encrypt or decrypt a blob of data using the user session key diff --git a/source4/libcli/auth/smbdes.c b/source4/libcli/auth/smbdes.c new file mode 100644 index 0000000000..d392109b1e --- /dev/null +++ b/source4/libcli/auth/smbdes.c @@ -0,0 +1,381 @@ +/* + Unix SMB/CIFS implementation. + + a partial implementation of DES designed for use in the + SMB authentication protocol + + Copyright (C) Andrew Tridgell 1998 + + This program 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 program 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., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +#include "includes.h" + +/* NOTES: + + This code makes no attempt to be fast! In fact, it is a very + slow implementation + + This code is NOT a complete DES implementation. It implements only + the minimum necessary for SMB authentication, as used by all SMB + products (including every copy of Microsoft Windows95 ever sold) + + In particular, it can only do a unchained forward DES pass. This + means it is not possible to use this code for encryption/decryption + of data, instead it is only useful as a "hash" algorithm. + + There is no entry point into this code that allows normal DES operation. + + I believe this means that this code does not come under ITAR + regulations but this is NOT a legal opinion. If you are concerned + about the applicability of ITAR regulations to this code then you + should confirm it for yourself (and maybe let me know if you come + up with a different answer to the one above) +*/ + + +static const uint8_t perm1[56] = {57, 49, 41, 33, 25, 17, 9, + 1, 58, 50, 42, 34, 26, 18, + 10, 2, 59, 51, 43, 35, 27, + 19, 11, 3, 60, 52, 44, 36, + 63, 55, 47, 39, 31, 23, 15, + 7, 62, 54, 46, 38, 30, 22, + 14, 6, 61, 53, 45, 37, 29, + 21, 13, 5, 28, 20, 12, 4}; + +static const uint8_t perm2[48] = {14, 17, 11, 24, 1, 5, + 3, 28, 15, 6, 21, 10, + 23, 19, 12, 4, 26, 8, + 16, 7, 27, 20, 13, 2, + 41, 52, 31, 37, 47, 55, + 30, 40, 51, 45, 33, 48, + 44, 49, 39, 56, 34, 53, + 46, 42, 50, 36, 29, 32}; + +static const uint8_t perm3[64] = {58, 50, 42, 34, 26, 18, 10, 2, + 60, 52, 44, 36, 28, 20, 12, 4, + 62, 54, 46, 38, 30, 22, 14, 6, + 64, 56, 48, 40, 32, 24, 16, 8, + 57, 49, 41, 33, 25, 17, 9, 1, + 59, 51, 43, 35, 27, 19, 11, 3, + 61, 53, 45, 37, 29, 21, 13, 5, + 63, 55, 47, 39, 31, 23, 15, 7}; + +static const uint8_t perm4[48] = { 32, 1, 2, 3, 4, 5, + 4, 5, 6, 7, 8, 9, + 8, 9, 10, 11, 12, 13, + 12, 13, 14, 15, 16, 17, + 16, 17, 18, 19, 20, 21, + 20, 21, 22, 23, 24, 25, + 24, 25, 26, 27, 28, 29, + 28, 29, 30, 31, 32, 1}; + +static const uint8_t perm5[32] = { 16, 7, 20, 21, + 29, 12, 28, 17, + 1, 15, 23, 26, + 5, 18, 31, 10, + 2, 8, 24, 14, + 32, 27, 3, 9, + 19, 13, 30, 6, + 22, 11, 4, 25}; + + +static const uint8_t perm6[64] ={ 40, 8, 48, 16, 56, 24, 64, 32, + 39, 7, 47, 15, 55, 23, 63, 31, + 38, 6, 46, 14, 54, 22, 62, 30, + 37, 5, 45, 13, 53, 21, 61, 29, + 36, 4, 44, 12, 52, 20, 60, 28, + 35, 3, 43, 11, 51, 19, 59, 27, + 34, 2, 42, 10, 50, 18, 58, 26, + 33, 1, 41, 9, 49, 17, 57, 25}; + + +static const uint8_t sc[16] = {1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1}; + +static const uint8_t sbox[8][4][16] = { + {{14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7}, + {0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8}, + {4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 5, 0}, + {15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13}}, + + {{15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10}, + {3, 13, 4, 7, 15, 2, 8, 14, 12, 0, 1, 10, 6, 9, 11, 5}, + {0, 14, 7, 11, 10, 4, 13, 1, 5, 8, 12, 6, 9, 3, 2, 15}, + {13, 8, 10, 1, 3, 15, 4, 2, 11, 6, 7, 12, 0, 5, 14, 9}}, + + {{10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8}, + {13, 7, 0, 9, 3, 4, 6, 10, 2, 8, 5, 14, 12, 11, 15, 1}, + {13, 6, 4, 9, 8, 15, 3, 0, 11, 1, 2, 12, 5, 10, 14, 7}, + {1, 10, 13, 0, 6, 9, 8, 7, 4, 15, 14, 3, 11, 5, 2, 12}}, + + {{7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15}, + {13, 8, 11, 5, 6, 15, 0, 3, 4, 7, 2, 12, 1, 10, 14, 9}, + {10, 6, 9, 0, 12, 11, 7, 13, 15, 1, 3, 14, 5, 2, 8, 4}, + {3, 15, 0, 6, 10, 1, 13, 8, 9, 4, 5, 11, 12, 7, 2, 14}}, + + {{2, 12, 4, 1, 7, 10, 11, 6, 8, 5, 3, 15, 13, 0, 14, 9}, + {14, 11, 2, 12, 4, 7, 13, 1, 5, 0, 15, 10, 3, 9, 8, 6}, + {4, 2, 1, 11, 10, 13, 7, 8, 15, 9, 12, 5, 6, 3, 0, 14}, + {11, 8, 12, 7, 1, 14, 2, 13, 6, 15, 0, 9, 10, 4, 5, 3}}, + + {{12, 1, 10, 15, 9, 2, 6, 8, 0, 13, 3, 4, 14, 7, 5, 11}, + {10, 15, 4, 2, 7, 12, 9, 5, 6, 1, 13, 14, 0, 11, 3, 8}, + {9, 14, 15, 5, 2, 8, 12, 3, 7, 0, 4, 10, 1, 13, 11, 6}, + {4, 3, 2, 12, 9, 5, 15, 10, 11, 14, 1, 7, 6, 0, 8, 13}}, + + {{4, 11, 2, 14, 15, 0, 8, 13, 3, 12, 9, 7, 5, 10, 6, 1}, + {13, 0, 11, 7, 4, 9, 1, 10, 14, 3, 5, 12, 2, 15, 8, 6}, + {1, 4, 11, 13, 12, 3, 7, 14, 10, 15, 6, 8, 0, 5, 9, 2}, + {6, 11, 13, 8, 1, 4, 10, 7, 9, 5, 0, 15, 14, 2, 3, 12}}, + + {{13, 2, 8, 4, 6, 15, 11, 1, 10, 9, 3, 14, 5, 0, 12, 7}, + {1, 15, 13, 8, 10, 3, 7, 4, 12, 5, 6, 11, 0, 14, 9, 2}, + {7, 11, 4, 1, 9, 12, 14, 2, 0, 6, 10, 13, 15, 3, 5, 8}, + {2, 1, 14, 7, 4, 10, 8, 13, 15, 12, 9, 0, 3, 5, 6, 11}}}; + +static void permute(char *out, const char *in, const uint8_t *p, int n) +{ + int i; + for (i=0;i<n;i++) + out[i] = in[p[i]-1]; +} + +static void lshift(char *d, int count, int n) +{ + char out[64]; + int i; + for (i=0;i<n;i++) + out[i] = d[(i+count)%n]; + for (i=0;i<n;i++) + d[i] = out[i]; +} + +static void concat(char *out, char *in1, char *in2, int l1, int l2) +{ + while (l1--) + *out++ = *in1++; + while (l2--) + *out++ = *in2++; +} + +static void xor(char *out, char *in1, char *in2, int n) +{ + int i; + for (i=0;i<n;i++) + out[i] = in1[i] ^ in2[i]; +} + +static void dohash(char *out, char *in, char *key, int forw) +{ + int i, j, k; + char pk1[56]; + char c[28]; + char d[28]; + char cd[56]; + char ki[16][48]; + char pd1[64]; + char l[32], r[32]; + char rl[64]; + + permute(pk1, key, perm1, 56); + + for (i=0;i<28;i++) + c[i] = pk1[i]; + for (i=0;i<28;i++) + d[i] = pk1[i+28]; + + for (i=0;i<16;i++) { + lshift(c, sc[i], 28); + lshift(d, sc[i], 28); + + concat(cd, c, d, 28, 28); + permute(ki[i], cd, perm2, 48); + } + + permute(pd1, in, perm3, 64); + + for (j=0;j<32;j++) { + l[j] = pd1[j]; + r[j] = pd1[j+32]; + } + + for (i=0;i<16;i++) { + char er[48]; + char erk[48]; + char b[8][6]; + char cb[32]; + char pcb[32]; + char r2[32]; + + permute(er, r, perm4, 48); + + xor(erk, er, ki[forw ? i : 15 - i], 48); + + for (j=0;j<8;j++) + for (k=0;k<6;k++) + b[j][k] = erk[j*6 + k]; + + for (j=0;j<8;j++) { + int m, n; + m = (b[j][0]<<1) | b[j][5]; + + n = (b[j][1]<<3) | (b[j][2]<<2) | (b[j][3]<<1) | b[j][4]; + + for (k=0;k<4;k++) + b[j][k] = (sbox[j][m][n] & (1<<(3-k)))?1:0; + } + + for (j=0;j<8;j++) + for (k=0;k<4;k++) + cb[j*4+k] = b[j][k]; + permute(pcb, cb, perm5, 32); + + xor(r2, l, pcb, 32); + + for (j=0;j<32;j++) + l[j] = r[j]; + + for (j=0;j<32;j++) + r[j] = r2[j]; + } + + concat(rl, r, l, 32, 32); + + permute(out, rl, perm6, 64); +} + +static void str_to_key(const uint8_t *str,uint8_t *key) +{ + int i; + + key[0] = str[0]>>1; + key[1] = ((str[0]&0x01)<<6) | (str[1]>>2); + key[2] = ((str[1]&0x03)<<5) | (str[2]>>3); + key[3] = ((str[2]&0x07)<<4) | (str[3]>>4); + key[4] = ((str[3]&0x0F)<<3) | (str[4]>>5); + key[5] = ((str[4]&0x1F)<<2) | (str[5]>>6); + key[6] = ((str[5]&0x3F)<<1) | (str[6]>>7); + key[7] = str[6]&0x7F; + for (i=0;i<8;i++) { + key[i] = (key[i]<<1); + } +} + +/* + basic des crypt using a 56 bit (7 byte) key +*/ +void des_crypt56(uint8_t out[8], const uint8_t in[8], const uint8_t key[7], int forw) +{ + int i; + char outb[64]; + char inb[64]; + char keyb[64]; + uint8_t key2[8]; + + str_to_key(key, key2); + + for (i=0;i<64;i++) { + inb[i] = (in[i/8] & (1<<(7-(i%8)))) ? 1 : 0; + keyb[i] = (key2[i/8] & (1<<(7-(i%8)))) ? 1 : 0; + outb[i] = 0; + } + + dohash(outb, inb, keyb, forw); + + for (i=0;i<8;i++) { + out[i] = 0; + } + + for (i=0;i<64;i++) { + if (outb[i]) + out[i/8] |= (1<<(7-(i%8))); + } +} + +void E_P16(const uint8_t *p14,uint8_t *p16) +{ + const uint8_t sp8[8] = {0x4b, 0x47, 0x53, 0x21, 0x40, 0x23, 0x24, 0x25}; + des_crypt56(p16, sp8, p14, 1); + des_crypt56(p16+8, sp8, p14+7, 1); +} + +void E_P24(const uint8_t *p21, const uint8_t *c8, uint8_t *p24) +{ + des_crypt56(p24, c8, p21, 1); + des_crypt56(p24+8, c8, p21+7, 1); + des_crypt56(p24+16, c8, p21+14, 1); +} + +void D_P16(const uint8_t *p14, const uint8_t *in, uint8_t *out) +{ + des_crypt56(out, in, p14, 0); + des_crypt56(out+8, in+8, p14+7, 0); +} + +void E_old_pw_hash( uint8_t *p14, const uint8_t *in, uint8_t *out) +{ + des_crypt56(out, in, p14, 1); + des_crypt56(out+8, in+8, p14+7, 1); +} + +/* des encryption with a 128 bit key */ +void des_crypt128(uint8_t out[8], const uint8_t in[8], const uint8_t key[16]) +{ + uint8_t buf[8]; + des_crypt56(buf, in, key, 1); + des_crypt56(out, buf, key+9, 1); +} + +/* des encryption with a 64 bit key */ +void des_crypt64(uint8_t out[8], const uint8_t in[8], const uint8_t key[8], int forw) +{ + uint8_t buf[8]; + uint8_t key2[8]; + ZERO_STRUCT(key2); + des_crypt56(buf, in, key, forw); + key2[0] = key[7]; + des_crypt56(out, buf, key2, forw); +} + +/* des encryption with a 112 bit (14 byte) key */ +void des_crypt112(uint8_t out[8], const uint8_t in[8], const uint8_t key[14], int forw) +{ + uint8_t buf[8]; + des_crypt56(buf, in, key, forw); + des_crypt56(out, buf, key+7, forw); +} + +/* des encryption of a 16 byte lump of data with a 112 bit key */ +void des_crypt112_16(uint8_t out[16], uint8_t in[16], const uint8_t key[14], int forw) +{ + des_crypt56(out, in, key, forw); + des_crypt56(out + 8, in + 8, key+7, forw); +} + +/* Decode a sam password hash into a password. The password hash is the + same method used to store passwords in the NT registry. The DES key + used is based on the RID of the user. */ +void sam_rid_crypt(uint_t rid, const uint8_t *in, uint8_t *out, int forw) +{ + uint8_t s[14]; + + s[0] = s[4] = s[8] = s[12] = (uint8_t)(rid & 0xFF); + s[1] = s[5] = s[9] = s[13] = (uint8_t)((rid >> 8) & 0xFF); + s[2] = s[6] = s[10] = (uint8_t)((rid >> 16) & 0xFF); + s[3] = s[7] = s[11] = (uint8_t)((rid >> 24) & 0xFF); + + des_crypt56(out, in, s, forw); + des_crypt56(out+8, in+8, s+7, forw); +} |