summaryrefslogtreecommitdiff
path: root/plugins/MirOTR/libotr-3.2.0/toolkit/sesskeys.c
diff options
context:
space:
mode:
Diffstat (limited to 'plugins/MirOTR/libotr-3.2.0/toolkit/sesskeys.c')
-rw-r--r--plugins/MirOTR/libotr-3.2.0/toolkit/sesskeys.c94
1 files changed, 0 insertions, 94 deletions
diff --git a/plugins/MirOTR/libotr-3.2.0/toolkit/sesskeys.c b/plugins/MirOTR/libotr-3.2.0/toolkit/sesskeys.c
deleted file mode 100644
index d823ebc17b..0000000000
--- a/plugins/MirOTR/libotr-3.2.0/toolkit/sesskeys.c
+++ /dev/null
@@ -1,94 +0,0 @@
-/*
- * Off-the-Record Messaging Toolkit
- * Copyright (C) 2004-2008 Ian Goldberg, Chris Alexander, Nikita Borisov
- * <otr@cypherpunks.ca>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-/* system headers */
-#include <stdlib.h>
-
-/* libgcrypt headers */
-#include <gcrypt.h>
-
-static const char* DH1536_MODULUS_S = "0x"
- "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1"
- "29024E088A67CC74020BBEA63B139B22514A08798E3404DD"
- "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245"
- "E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED"
- "EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE45B3D"
- "C2007CB8A163BF0598DA48361C55D39A69163FA8FD24CF5F"
- "83655D23DCA3AD961C62F356208552BB9ED529077096966D"
- "670C354E4ABC9804F1746C08CA237327FFFFFFFFFFFFFFFF";
-static const char *DH1536_GENERATOR_S = "0x02";
-
-/* Generate the session id and the two encryption keys from our private
- * DH key and their public DH key. Also indicate in *high_endp if we
- * are the "high" end of the key exchange (set to 1) or the "low" end
- * (set to 0) */
-void sesskeys_gen(unsigned char sessionid[20], unsigned char sendenc[16],
- unsigned char rcvenc[16], int *high_endp, gcry_mpi_t *our_yp,
- gcry_mpi_t our_x, gcry_mpi_t their_y)
-{
- gcry_mpi_t modulus, generator, secretv;
- unsigned char *secret;
- size_t secretlen;
- unsigned char hash[20];
- int is_high;
-
- gcry_mpi_scan(&modulus, GCRYMPI_FMT_HEX, DH1536_MODULUS_S, 0, NULL);
- gcry_mpi_scan(&generator, GCRYMPI_FMT_HEX, DH1536_GENERATOR_S, 0, NULL);
- *our_yp = gcry_mpi_new(0);
- gcry_mpi_powm(*our_yp, generator, our_x, modulus);
- secretv = gcry_mpi_new(0);
- gcry_mpi_powm(secretv, their_y, our_x, modulus);
- gcry_mpi_release(generator);
- gcry_mpi_release(modulus);
- gcry_mpi_print(GCRYMPI_FMT_USG, NULL, 0, &secretlen, secretv);
- secret = malloc(secretlen + 5);
-
- secret[1] = (secretlen >> 24) & 0xff;
- secret[2] = (secretlen >> 16) & 0xff;
- secret[3] = (secretlen >> 8) & 0xff;
- secret[4] = (secretlen) & 0xff;
- gcry_mpi_print(GCRYMPI_FMT_USG, secret+5, secretlen, NULL, secretv);
- gcry_mpi_release(secretv);
-
- is_high = (gcry_mpi_cmp(*our_yp, their_y) > 0);
-
- /* Calculate the session id */
- secret[0] = 0x00;
- gcry_md_hash_buffer(GCRY_MD_SHA1, hash, secret, secretlen+5);
- memmove(sessionid, hash, 20);
-
- /* Calculate the sending enc key */
- secret[0] = is_high ? 0x01 : 0x02;
- gcry_md_hash_buffer(GCRY_MD_SHA1, hash, secret, secretlen+5);
- memmove(sendenc, hash, 16);
-
- /* Calculate the receiving enc key */
- secret[0] = is_high ? 0x02 : 0x01;
- gcry_md_hash_buffer(GCRY_MD_SHA1, hash, secret, secretlen+5);
- memmove(rcvenc, hash, 16);
-
- *high_endp = is_high;
- free(secret);
-}
-
-/* Generate a MAC key from the corresponding encryption key */
-void sesskeys_make_mac(unsigned char mackey[20], unsigned char enckey[16])
-{
- gcry_md_hash_buffer(GCRY_MD_SHA1, mackey, enckey, 16);
-}