diff options
Diffstat (limited to 'sys/crypto/cast128/cast128_cbc.c')
| -rw-r--r-- | sys/crypto/cast128/cast128_cbc.c | 222 |
1 files changed, 0 insertions, 222 deletions
diff --git a/sys/crypto/cast128/cast128_cbc.c b/sys/crypto/cast128/cast128_cbc.c deleted file mode 100644 index e4725a9..0000000 --- a/sys/crypto/cast128/cast128_cbc.c +++ /dev/null @@ -1,222 +0,0 @@ -/* $FreeBSD$ */ -/* $KAME: cast128_cbc.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 <sys/param.h> -#include <sys/systm.h> -#include <sys/mbuf.h> -#include <crypto/cast128/cast128.h> - -#define panic(x) do { printf(x); return EINVAL; } while (0) - -int -cast128_cbc_process(m0, skip, length, subkey, iv, keylen, mode) - struct mbuf *m0; - size_t skip; - size_t length; - u_int32_t *subkey; - u_int8_t *iv; - size_t keylen; - int mode; -{ - struct mbuf *m; - u_int8_t inbuf[8], outbuf[8]; - size_t off; - - /* sanity check */ - if (m0->m_pkthdr.len < skip) { - printf("cast128_cbc_process: mbuf length < skip\n"); - return EINVAL; - } - if (m0->m_pkthdr.len < length) { - printf("cast128_cbc_process: mbuf length < encrypt length\n"); - return EINVAL; - } - if (m0->m_pkthdr.len < skip + length) { - printf("cast128_cbc_process: " - "mbuf length < skip + encrypt length\n"); - return EINVAL; - } - if (length % 8) { - printf("cast128_cbc_process: length is not multiple of 8\n"); - return EINVAL; - } - - m = m0; - off = 0; - - /* skip over the header */ - while (skip) { - if (!m) - panic("cast128_cbc_process: mbuf chain?\n"); - if (m->m_len <= skip) { - skip -= m->m_len; - m = m->m_next; - off = 0; - } else { - off = skip; - skip = 0; - } - } - - /* copy iv into outbuf for XOR (encrypt) */ - bcopy(iv, outbuf, 8); - - /* - * encrypt/decrypt packet - */ - while (length > 0) { - int i; - - if (!m) - panic("cast128_cbc_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, 8); - else { - struct mbuf *n; - size_t noff; - u_int8_t *p, *in; - - n = m; - noff = off; - p = mtod(n, u_int8_t *) + noff; - - in = inbuf; - while (in - inbuf < 8) { - if (!p) { - panic("cast128_cbc_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 *); - else - p = NULL; - } - } - - /* encrypt/decrypt */ - switch (mode) { - case CAST128_ENCRYPT: - /* XOR */ - for (i = 0; i < 8; i++) - inbuf[i] ^= outbuf[i]; - - /* encrypt */ - if (keylen <= 80/8) - cast128_encrypt_round12(outbuf, inbuf, subkey); - else - cast128_encrypt_round16(outbuf, inbuf, subkey); - break; - - case CAST128_DECRYPT: - /* decrypt */ - if (keylen <= 80/8) - cast128_decrypt_round12(outbuf, inbuf, subkey); - else - cast128_decrypt_round16(outbuf, inbuf, subkey); - - /* XOR */ - for (i = 0; i < 8; i++) - outbuf[i] ^= iv[i]; - - /* copy inbuf into iv for next XOR */ - bcopy(inbuf, iv, 8); - break; - } - - /* - * copy the output buffer into the result. - * need to update off and m. - */ - if (off + 8 < m->m_len) { - bcopy(outbuf, mtod(m, u_int8_t *) + off, 8); - off += 8; - } else if (off + 8 == m->m_len) { - bcopy(outbuf, 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, *out; - - n = m; - noff = off; - p = mtod(n, u_int8_t *) + noff; - - out = outbuf; - while (out - outbuf < 8) { - if (!p) { - panic("cast128_cbc_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 *); - else - p = NULL; - } - - m = n; - off = noff; - } - - length -= 8; - } - - return 0; -} |
