diff options
Diffstat (limited to 'sys/crypto/des/des_3cbc.c')
| -rw-r--r-- | sys/crypto/des/des_3cbc.c | 250 |
1 files changed, 0 insertions, 250 deletions
diff --git a/sys/crypto/des/des_3cbc.c b/sys/crypto/des/des_3cbc.c deleted file mode 100644 index e675871..0000000 --- a/sys/crypto/des/des_3cbc.c +++ /dev/null @@ -1,250 +0,0 @@ -/* $FreeBSD$ */ -/* $KAME: des_3cbc.c,v 1.4 2000/06/14 10:41:17 itojun Exp $ */ - -/* - * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the project nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ -/* - * based on sys/crypto/des/des_cbc.c, rewrote by Tomomi Suzuki - */ -#include <crypto/des/des_locl.h> - -#define panic(x) do { printf(x); return EINVAL; } while (0) - -int des_3cbc_process(m0, skip, length, schedule, ivec, mode) - struct mbuf *m0; - size_t skip; - size_t length; - des_key_schedule *schedule; - des_cblock (*ivec); - int mode; -{ - u_int8_t inbuf[8], outbuf[8]; - struct mbuf *m; - size_t off; - DES_LONG tin0, tin1; - DES_LONG tout0, tout1; - DES_LONG tin[2]; - DES_LONG xor0 = 0, xor1 = 0; - u_int8_t *iv; - u_int8_t *in, *out; - - /* sanity check */ - if (m0->m_pkthdr.len < skip) { - printf("des_3cbc_process: mbuf length < skip\n"); - return EINVAL; - } - if (m0->m_pkthdr.len < length) { - printf("des_3cbc_process: mbuf length < encrypt length\n"); - return EINVAL; - } - if (m0->m_pkthdr.len < skip + length) { - printf("des_3cbc_process: mbuf length < " - "skip + encrypt length\n"); - return EINVAL; - } - if (length % 8) { - printf("des_3cbc_process: length(%lu) is not multiple of 8\n", - (u_long)length); - return EINVAL; - } - - m = m0; - off = 0; - - /* skip over the header */ - while (skip) { - if (!m) - panic("des_3cbc_process: mbuf chain?\n"); - if (m->m_len <= skip) { - skip -= m->m_len; - m = m->m_next; - off = 0; - } else { - off = skip; - skip = 0; - } - } - - /* initialize */ - tin0 = tin1 = tout0 = tout1 = 0; - tin[0] = tin[1] = 0; - - switch (mode) { - case DES_ENCRYPT: - iv = (u_int8_t *)ivec; - c2l(iv, tout0); - c2l(iv, tout1); - break; - case DES_DECRYPT: - xor0 = xor1 = 0; - iv = (u_int8_t *)ivec; - c2l(iv, xor0); - c2l(iv, xor1); - break; - } - - /* - * encrypt/decrypt packet - */ - while (length > 0) { - if (!m) - panic("des_3cbc_process: mbuf chain?\n"); - - /* - * copy the source into input buffer. - * don't update off or m, since we need to use them - * later. - */ - if (off + 8 <= m->m_len) - bcopy(mtod(m, u_int8_t *) + off, &inbuf[0], 8); - else { - struct mbuf *n; - size_t noff; - u_int8_t *p; - u_int8_t *in; - - n = m; - noff = off; - p = mtod(n, u_int8_t *) + noff; - - in = &inbuf[0]; - while (in - &inbuf[0] < 8) { - if (!p) { - panic("des_3cbc_process: " - "mbuf chain?\n"); - } - *in++ = *p++; - noff++; - if (noff < n->m_len) - continue; - do { - n = n->m_next; - } while (n && !n->m_len); - noff = 0; - if (n) - p = mtod(n, u_int8_t *) + noff; - else - p = NULL; - } - } - - /* encrypt/decrypt */ - switch (mode) { - case DES_ENCRYPT: - in = &inbuf[0]; - out = &outbuf[0]; - c2l(in, tin0); - c2l(in, tin1); - - /* XOR */ - tin0 ^= tout0; tin[0] = tin0; - tin1 ^= tout1; tin[1] = tin1; - - des_encrypt((DES_LONG *)tin, schedule[0], DES_ENCRYPT); - des_encrypt((DES_LONG *)tin, schedule[1], DES_DECRYPT); - des_encrypt((DES_LONG *)tin, schedule[2], DES_ENCRYPT); - - tout0 = tin[0]; l2c(tout0, out); - tout1 = tin[1]; l2c(tout1, out); - break; - case DES_DECRYPT: - in = &inbuf[0]; - out = &outbuf[0]; - c2l(in, tin0); tin[0] = tin0; - c2l(in, tin1); tin[1] = tin1; - - des_encrypt((DES_LONG *)tin, schedule[2], DES_DECRYPT); - des_encrypt((DES_LONG *)tin, schedule[1], DES_ENCRYPT); - des_encrypt((DES_LONG *)tin, schedule[0], DES_DECRYPT); - - /* XOR */ - tout0 = tin[0] ^ xor0; - tout1 = tin[1] ^ xor1; - l2c(tout0, out); - l2c(tout1, out); - - /* for next iv */ - xor0 = tin0; - xor1 = tin1; - break; - } - - /* - * copy the output buffer int the result. - * need to update off and m. - */ - if (off + 8 < m->m_len) { - bcopy(&outbuf[0], mtod(m, u_int8_t *) + off, 8); - off += 8; - } else if (off + 8 == m->m_len) { - bcopy(&outbuf[0], mtod(m, u_int8_t *) + off, 8); - do { - m = m->m_next; - } while (m && !m->m_len); - off = 0; - } else { - struct mbuf *n; - size_t noff; - u_int8_t *p; - u_int8_t *out; - - n = m; - noff = off; - p = mtod(n, u_int8_t *) + noff; - - out = &outbuf[0]; - while (out - &outbuf[0] < 8) { - if (!p) { - panic("des_3cbc_process: " - "mbuf chain?\n"); - } - *p++ = *out++; - noff++; - if (noff < n->m_len) - continue; - do { - n = n->m_next; - } while (n && !n->m_len); - noff = 0; - if (n) - p = mtod(n, u_int8_t *) + noff; - else - p = NULL; - } - - m = n; - off = noff; - } - - length -= 8; - } - - return 0; -} - |
