Add XTS mode to cgd(4).
This commit is contained in:
alnsn
parent
d3581646bd
commit
b21f21df5a
232
sys/dev/cgd.c
232
sys/dev/cgd.c
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@ -1,4 +1,4 @@
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/* $NetBSD: cgd.c,v 1.111 2016/09/14 23:16:30 mlelstv Exp $ */
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/* $NetBSD: cgd.c,v 1.112 2016/12/11 00:20:49 alnsn Exp $ */
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/*-
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* Copyright (c) 2002 The NetBSD Foundation, Inc.
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@ -30,7 +30,7 @@
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: cgd.c,v 1.111 2016/09/14 23:16:30 mlelstv Exp $");
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__KERNEL_RCSID(0, "$NetBSD: cgd.c,v 1.112 2016/12/11 00:20:49 alnsn Exp $");
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#include <sys/types.h>
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#include <sys/param.h>
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@ -59,6 +59,18 @@ __KERNEL_RCSID(0, "$NetBSD: cgd.c,v 1.111 2016/09/14 23:16:30 mlelstv Exp $");
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#include "ioconf.h"
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struct selftest_params {
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const char *alg;
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int blocksize; /* number of bytes */
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int secsize;
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daddr_t blkno;
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int keylen; /* number of bits */
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int txtlen; /* number of bytes */
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const uint8_t *key;
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const uint8_t *ptxt;
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const uint8_t *ctxt;
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};
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/* Entry Point Functions */
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static dev_type_open(cgdopen);
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@ -96,6 +108,101 @@ const struct cdevsw cgd_cdevsw = {
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.d_flag = D_DISK
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};
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/*
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* Vector 5 from IEEE 1619/D16 truncated to 64 bytes, blkno 1.
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*/
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static const uint8_t selftest_aes_xts_256_ptxt[64] = {
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0x27, 0xa7, 0x47, 0x9b, 0xef, 0xa1, 0xd4, 0x76,
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0x48, 0x9f, 0x30, 0x8c, 0xd4, 0xcf, 0xa6, 0xe2,
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0xa9, 0x6e, 0x4b, 0xbe, 0x32, 0x08, 0xff, 0x25,
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0x28, 0x7d, 0xd3, 0x81, 0x96, 0x16, 0xe8, 0x9c,
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0xc7, 0x8c, 0xf7, 0xf5, 0xe5, 0x43, 0x44, 0x5f,
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0x83, 0x33, 0xd8, 0xfa, 0x7f, 0x56, 0x00, 0x00,
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0x05, 0x27, 0x9f, 0xa5, 0xd8, 0xb5, 0xe4, 0xad,
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0x40, 0xe7, 0x36, 0xdd, 0xb4, 0xd3, 0x54, 0x12,
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};
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static const uint8_t selftest_aes_xts_256_ctxt[512] = {
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0x26, 0x4d, 0x3c, 0xa8, 0x51, 0x21, 0x94, 0xfe,
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0xc3, 0x12, 0xc8, 0xc9, 0x89, 0x1f, 0x27, 0x9f,
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0xef, 0xdd, 0x60, 0x8d, 0x0c, 0x02, 0x7b, 0x60,
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0x48, 0x3a, 0x3f, 0xa8, 0x11, 0xd6, 0x5e, 0xe5,
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0x9d, 0x52, 0xd9, 0xe4, 0x0e, 0xc5, 0x67, 0x2d,
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0x81, 0x53, 0x2b, 0x38, 0xb6, 0xb0, 0x89, 0xce,
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0x95, 0x1f, 0x0f, 0x9c, 0x35, 0x59, 0x0b, 0x8b,
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0x97, 0x8d, 0x17, 0x52, 0x13, 0xf3, 0x29, 0xbb,
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};
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static const uint8_t selftest_aes_xts_256_key[33] = {
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0x27, 0x18, 0x28, 0x18, 0x28, 0x45, 0x90, 0x45,
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0x23, 0x53, 0x60, 0x28, 0x74, 0x71, 0x35, 0x26,
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0x31, 0x41, 0x59, 0x26, 0x53, 0x58, 0x97, 0x93,
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0x23, 0x84, 0x62, 0x64, 0x33, 0x83, 0x27, 0x95,
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0
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};
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/*
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* Vector 11 from IEEE 1619/D16 truncated to 64 bytes, blkno 0xffff.
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*/
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static const uint8_t selftest_aes_xts_512_ptxt[64] = {
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0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
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0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
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0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
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0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
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0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
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0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
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0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
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0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
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};
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static const uint8_t selftest_aes_xts_512_ctxt[64] = {
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0x77, 0xa3, 0x12, 0x51, 0x61, 0x8a, 0x15, 0xe6,
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0xb9, 0x2d, 0x1d, 0x66, 0xdf, 0xfe, 0x7b, 0x50,
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0xb5, 0x0b, 0xad, 0x55, 0x23, 0x05, 0xba, 0x02,
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0x17, 0xa6, 0x10, 0x68, 0x8e, 0xff, 0x7e, 0x11,
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0xe1, 0xd0, 0x22, 0x54, 0x38, 0xe0, 0x93, 0x24,
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0x2d, 0x6d, 0xb2, 0x74, 0xfd, 0xe8, 0x01, 0xd4,
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0xca, 0xe0, 0x6f, 0x20, 0x92, 0xc7, 0x28, 0xb2,
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0x47, 0x85, 0x59, 0xdf, 0x58, 0xe8, 0x37, 0xc2,
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};
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static const uint8_t selftest_aes_xts_512_key[65] = {
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0x27, 0x18, 0x28, 0x18, 0x28, 0x45, 0x90, 0x45,
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0x23, 0x53, 0x60, 0x28, 0x74, 0x71, 0x35, 0x26,
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0x62, 0x49, 0x77, 0x57, 0x24, 0x70, 0x93, 0x69,
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0x99, 0x59, 0x57, 0x49, 0x66, 0x96, 0x76, 0x27,
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0x31, 0x41, 0x59, 0x26, 0x53, 0x58, 0x97, 0x93,
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0x23, 0x84, 0x62, 0x64, 0x33, 0x83, 0x27, 0x95,
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0x02, 0x88, 0x41, 0x97, 0x16, 0x93, 0x99, 0x37,
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0x51, 0x05, 0x82, 0x09, 0x74, 0x94, 0x45, 0x92,
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0
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};
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const struct selftest_params selftests[] = {
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{
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.alg = "aes-xts",
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.blocksize = 16,
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.secsize = 512,
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.blkno = 1,
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.keylen = 256,
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.txtlen = sizeof(selftest_aes_xts_256_ptxt),
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.key = selftest_aes_xts_256_key,
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.ptxt = selftest_aes_xts_256_ptxt,
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.ctxt = selftest_aes_xts_256_ctxt
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},
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{
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.alg = "aes-xts",
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.blocksize = 16,
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.secsize = 512,
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.blkno = 0xffff,
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.keylen = 512,
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.txtlen = sizeof(selftest_aes_xts_512_ptxt),
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.key = selftest_aes_xts_512_key,
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.ptxt = selftest_aes_xts_512_ptxt,
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.ctxt = selftest_aes_xts_512_ctxt
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}
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};
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static int cgd_match(device_t, cfdata_t, void *);
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static void cgd_attach(device_t, device_t, void *);
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static int cgd_detach(device_t, int);
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@ -896,19 +1003,6 @@ bail:
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* We implement here the IV method ``encrypted block
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* number''.
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*
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* For the encryption case, we accomplish this by setting
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* up a struct uio where the first iovec of the source is
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* the blocknumber and the first iovec of the dest is a
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* sink. We then call the cipher with an IV of zero, and
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* the right thing happens.
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*
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* For the decryption case, we use the same basic mechanism
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* for symmetry, but we encrypt the block number in the
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* first iovec.
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*
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* We mainly do this to avoid requiring the definition of
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* an ECB mode.
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*
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* XXXrcd: for now we rely on our own crypto framework defined
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* in dev/cgd_crypto.c. This will change when we
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* get a generic kernel crypto framework.
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@ -945,7 +1039,8 @@ cgd_cipher(struct cgd_softc *cs, void *dstv, void *srcv,
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size_t len, daddr_t blkno, size_t secsize, int dir)
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{
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char *dst = dstv;
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char *src = srcv;
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char *src = srcv;
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cfunc_cipher_prep *ciprep = cs->sc_cfuncs->cf_cipher_prep;
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cfunc_cipher *cipher = cs->sc_cfuncs->cf_cipher;
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struct uio dstuio;
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struct uio srcuio;
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@ -953,9 +1048,7 @@ cgd_cipher(struct cgd_softc *cs, void *dstv, void *srcv,
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struct iovec srciov[2];
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size_t blocksize = cs->sc_cdata.cf_blocksize;
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size_t todo;
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char sink[CGD_MAXBLOCKSIZE];
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char zero_iv[CGD_MAXBLOCKSIZE];
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char blkno_buf[CGD_MAXBLOCKSIZE];
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char blkno_buf[CGD_MAXBLOCKSIZE], *iv;
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DPRINTF_FOLLOW(("cgd_cipher() dir=%d\n", dir));
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@ -966,46 +1059,37 @@ cgd_cipher(struct cgd_softc *cs, void *dstv, void *srcv,
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DIAGCONDPANIC(sizeof(daddr_t) > blocksize,
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("cgd_cipher: sizeof(daddr_t) > blocksize"));
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memset(zero_iv, 0x0, blocksize);
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DIAGCONDPANIC(blocksize > CGD_MAXBLOCKSIZE,
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("cgd_cipher: blocksize > CGD_MAXBLOCKSIZE"));
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dstuio.uio_iov = dstiov;
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dstuio.uio_iovcnt = 2;
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dstuio.uio_iovcnt = 1;
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srcuio.uio_iov = srciov;
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srcuio.uio_iovcnt = 2;
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dstiov[0].iov_base = sink;
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dstiov[0].iov_len = blocksize;
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srciov[0].iov_base = blkno_buf;
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srciov[0].iov_len = blocksize;
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srcuio.uio_iovcnt = 1;
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for (; len > 0; len -= todo) {
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todo = MIN(len, secsize);
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dstiov[1].iov_base = dst;
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srciov[1].iov_base = src;
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dstiov[1].iov_len = todo;
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srciov[1].iov_len = todo;
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dstiov[0].iov_base = dst;
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srciov[0].iov_base = src;
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dstiov[0].iov_len = todo;
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srciov[0].iov_len = todo;
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memset(blkno_buf, 0x0, blocksize);
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blkno2blkno_buf(blkno_buf, blkno);
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if (dir == CGD_CIPHER_DECRYPT) {
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dstuio.uio_iovcnt = 1;
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srcuio.uio_iovcnt = 1;
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IFDEBUG(CGDB_CRYPTO, hexprint("step 0: blkno_buf",
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blkno_buf, blocksize));
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cipher(cs->sc_cdata.cf_priv, &dstuio, &srcuio,
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zero_iv, CGD_CIPHER_ENCRYPT);
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memcpy(blkno_buf, sink, blocksize);
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dstuio.uio_iovcnt = 2;
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srcuio.uio_iovcnt = 2;
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}
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IFDEBUG(CGDB_CRYPTO, hexprint("step 1: blkno_buf",
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blkno_buf, blocksize));
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cipher(cs->sc_cdata.cf_priv, &dstuio, &srcuio, zero_iv, dir);
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IFDEBUG(CGDB_CRYPTO, hexprint("step 2: sink",
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sink, blocksize));
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/*
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* Compute an initial IV. All ciphers
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* can convert blkno_buf in-place.
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*/
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iv = blkno_buf;
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ciprep(cs->sc_cdata.cf_priv, iv, blkno_buf, blocksize, dir);
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IFDEBUG(CGDB_CRYPTO, hexprint("step 2: iv", iv, blocksize));
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cipher(cs->sc_cdata.cf_priv, &dstuio, &srcuio, iv, dir);
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dst += todo;
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src += todo;
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@ -1026,6 +1110,61 @@ hexprint(const char *start, void *buf, int len)
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}
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#endif
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static void
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selftest(void)
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{
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struct cgd_softc cs;
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void *buf;
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printf("running cgd selftest ");
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for (size_t i = 0; i < __arraycount(selftests); i++) {
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const char *alg = selftests[i].alg;
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const uint8_t *key = selftests[i].key;
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int keylen = selftests[i].keylen;
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int txtlen = selftests[i].txtlen;
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printf("%s-%d ", alg, keylen);
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memset(&cs, 0, sizeof(cs));
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cs.sc_cfuncs = cryptfuncs_find(alg);
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if (cs.sc_cfuncs == NULL)
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panic("%s not implemented", alg);
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cs.sc_cdata.cf_blocksize = 8 * selftests[i].blocksize;
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cs.sc_cdata.cf_mode = CGD_CIPHER_CBC_ENCBLKNO1;
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cs.sc_cdata.cf_keylen = keylen;
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cs.sc_cdata.cf_priv = cs.sc_cfuncs->cf_init(keylen,
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key, &cs.sc_cdata.cf_blocksize);
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if (cs.sc_cdata.cf_priv == NULL)
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panic("cf_priv is NULL");
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if (cs.sc_cdata.cf_blocksize > CGD_MAXBLOCKSIZE)
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panic("bad block size %zu", cs.sc_cdata.cf_blocksize);
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cs.sc_cdata.cf_blocksize /= 8;
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buf = malloc(txtlen, M_DEVBUF, M_WAITOK);
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memcpy(buf, selftests[i].ptxt, txtlen);
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cgd_cipher(&cs, buf, buf, txtlen, selftests[i].blkno,
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selftests[i].secsize, CGD_CIPHER_ENCRYPT);
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if (memcmp(buf, selftests[i].ctxt, txtlen) != 0)
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panic("encryption is broken");
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cgd_cipher(&cs, buf, buf, txtlen, selftests[i].blkno,
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selftests[i].secsize, CGD_CIPHER_DECRYPT);
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if (memcmp(buf, selftests[i].ptxt, txtlen) != 0)
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panic("decryption is broken");
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free(buf, M_DEVBUF);
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cs.sc_cfuncs->cf_destroy(cs.sc_cdata.cf_priv);
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}
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printf("done\n");
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}
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MODULE(MODULE_CLASS_DRIVER, cgd, "dk_subr");
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#ifdef _MODULE
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@ -1041,6 +1180,7 @@ cgd_modcmd(modcmd_t cmd, void *arg)
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switch (cmd) {
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case MODULE_CMD_INIT:
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selftest();
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#ifdef _MODULE
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error = config_cfdriver_attach(&cgd_cd);
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if (error)
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@ -1,4 +1,4 @@
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/* $NetBSD: cgd_crypto.c,v 1.13 2015/04/25 12:55:04 riastradh Exp $ */
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/* $NetBSD: cgd_crypto.c,v 1.14 2016/12/11 00:20:49 alnsn Exp $ */
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/*-
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* Copyright (c) 2002 The NetBSD Foundation, Inc.
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@ -37,7 +37,7 @@
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: cgd_crypto.c,v 1.13 2015/04/25 12:55:04 riastradh Exp $");
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__KERNEL_RCSID(0, "$NetBSD: cgd_crypto.c,v 1.14 2016/12/11 00:20:49 alnsn Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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@ -62,36 +62,54 @@ __KERNEL_RCSID(0, "$NetBSD: cgd_crypto.c,v 1.13 2015/04/25 12:55:04 riastradh Ex
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* to check key size and block size.
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*/
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static cfunc_init cgd_cipher_aes_init;
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static cfunc_destroy cgd_cipher_aes_destroy;
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static cfunc_cipher cgd_cipher_aes_cbc;
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static cfunc_init cgd_cipher_aes_cbc_init;
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static cfunc_destroy cgd_cipher_aes_cbc_destroy;
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static cfunc_cipher cgd_cipher_aes_cbc;
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static cfunc_cipher_prep cgd_cipher_aes_cbc_prep;
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static cfunc_init cgd_cipher_3des_init;
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static cfunc_destroy cgd_cipher_3des_destroy;
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static cfunc_cipher cgd_cipher_3des_cbc;
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static cfunc_init cgd_cipher_aes_xts_init;
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static cfunc_destroy cgd_cipher_aes_xts_destroy;
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static cfunc_cipher cgd_cipher_aes_xts;
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static cfunc_cipher_prep cgd_cipher_aes_xts_prep;
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static cfunc_init cgd_cipher_bf_init;
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static cfunc_destroy cgd_cipher_bf_destroy;
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static cfunc_cipher cgd_cipher_bf_cbc;
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static cfunc_init cgd_cipher_3des_init;
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static cfunc_destroy cgd_cipher_3des_destroy;
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static cfunc_cipher cgd_cipher_3des_cbc;
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static cfunc_cipher_prep cgd_cipher_3des_cbc_prep;
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static cfunc_init cgd_cipher_bf_init;
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static cfunc_destroy cgd_cipher_bf_destroy;
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static cfunc_cipher cgd_cipher_bf_cbc;
|
||||
static cfunc_cipher_prep cgd_cipher_bf_cbc_prep;
|
||||
|
||||
static const struct cryptfuncs cf[] = {
|
||||
{
|
||||
.cf_name = "aes-xts",
|
||||
.cf_init = cgd_cipher_aes_xts_init,
|
||||
.cf_destroy = cgd_cipher_aes_xts_destroy,
|
||||
.cf_cipher = cgd_cipher_aes_xts,
|
||||
.cf_cipher_prep = cgd_cipher_aes_xts_prep,
|
||||
},
|
||||
{
|
||||
.cf_name = "aes-cbc",
|
||||
.cf_init = cgd_cipher_aes_init,
|
||||
.cf_destroy = cgd_cipher_aes_destroy,
|
||||
.cf_init = cgd_cipher_aes_cbc_init,
|
||||
.cf_destroy = cgd_cipher_aes_cbc_destroy,
|
||||
.cf_cipher = cgd_cipher_aes_cbc,
|
||||
.cf_cipher_prep = cgd_cipher_aes_cbc_prep,
|
||||
},
|
||||
{
|
||||
.cf_name = "3des-cbc",
|
||||
.cf_init = cgd_cipher_3des_init,
|
||||
.cf_destroy = cgd_cipher_3des_destroy,
|
||||
.cf_cipher = cgd_cipher_3des_cbc,
|
||||
.cf_cipher_prep = cgd_cipher_3des_cbc_prep,
|
||||
},
|
||||
{
|
||||
.cf_name = "blowfish-cbc",
|
||||
.cf_init = cgd_cipher_bf_init,
|
||||
.cf_destroy = cgd_cipher_bf_destroy,
|
||||
.cf_cipher = cgd_cipher_bf_cbc,
|
||||
.cf_cipher_prep = cgd_cipher_bf_cbc_prep,
|
||||
},
|
||||
};
|
||||
const struct cryptfuncs *
|
||||
|
|
@ -108,11 +126,11 @@ cryptfuncs_find(const char *alg)
|
|||
typedef void (*cipher_func)(void *, void *, const void *, size_t);
|
||||
|
||||
static void
|
||||
cgd_cipher_uio_cbc(void *privdata, cipher_func cipher,
|
||||
cgd_cipher_uio(void *privdata, cipher_func cipher,
|
||||
struct uio *dstuio, struct uio *srcuio);
|
||||
|
||||
/*
|
||||
* cgd_cipher_uio_cbc takes a simple cbc cipher and iterates
|
||||
* cgd_cipher_uio takes a simple cbc or xts cipher and iterates
|
||||
* it over two struct uio's. It presumes that the cipher function
|
||||
* that is passed to it keeps the IV state between calls.
|
||||
*
|
||||
|
|
@ -123,7 +141,7 @@ cgd_cipher_uio_cbc(void *privdata, cipher_func cipher,
|
|||
*/
|
||||
|
||||
static void
|
||||
cgd_cipher_uio_cbc(void *privdata, cipher_func cipher,
|
||||
cgd_cipher_uio(void *privdata, cipher_func cipher,
|
||||
struct uio *dstuio, struct uio *srcuio)
|
||||
{
|
||||
const struct iovec *dst;
|
||||
|
|
@ -185,7 +203,7 @@ struct aes_encdata {
|
|||
};
|
||||
|
||||
static void *
|
||||
cgd_cipher_aes_init(size_t keylen, const void *key, size_t *blocksize)
|
||||
cgd_cipher_aes_cbc_init(size_t keylen, const void *key, size_t *blocksize)
|
||||
{
|
||||
struct aes_privdata *ap;
|
||||
|
||||
|
|
@ -206,7 +224,7 @@ cgd_cipher_aes_init(size_t keylen, const void *key, size_t *blocksize)
|
|||
}
|
||||
|
||||
static void
|
||||
cgd_cipher_aes_destroy(void *data)
|
||||
cgd_cipher_aes_cbc_destroy(void *data)
|
||||
{
|
||||
struct aes_privdata *apd = data;
|
||||
|
||||
|
|
@ -214,13 +232,31 @@ cgd_cipher_aes_destroy(void *data)
|
|||
free(apd, M_DEVBUF);
|
||||
}
|
||||
|
||||
static void
|
||||
cgd_cipher_aes_cbc_prep(void *privdata, char *iv,
|
||||
const char *blkno_buf, size_t blocksize, int dir)
|
||||
{
|
||||
struct aes_privdata *apd = privdata;
|
||||
cipherInstance cipher;
|
||||
int cipher_ok __diagused;
|
||||
|
||||
cipher_ok = rijndael_cipherInit(&cipher, MODE_CBC, NULL);
|
||||
KASSERT(cipher_ok > 0);
|
||||
rijndael_blockEncrypt(&cipher, &apd->ap_enckey,
|
||||
blkno_buf, blocksize * 8, iv);
|
||||
if (blocksize > 16)
|
||||
(void)memmove(iv, iv + blocksize - 16, 16);
|
||||
}
|
||||
|
||||
static void
|
||||
aes_cbc_enc_int(void *privdata, void *dst, const void *src, size_t len)
|
||||
{
|
||||
struct aes_encdata *ae = privdata;
|
||||
cipherInstance cipher;
|
||||
int cipher_ok __diagused;
|
||||
|
||||
rijndael_cipherInit(&cipher, MODE_CBC, ae->ae_iv);
|
||||
cipher_ok = rijndael_cipherInit(&cipher, MODE_CBC, ae->ae_iv);
|
||||
KASSERT(cipher_ok > 0);
|
||||
rijndael_blockEncrypt(&cipher, ae->ae_key, src, len * 8, dst);
|
||||
(void)memcpy(ae->ae_iv, (u_int8_t *)dst + (len - 16), 16);
|
||||
}
|
||||
|
|
@ -230,8 +266,10 @@ aes_cbc_dec_int(void *privdata, void *dst, const void *src, size_t len)
|
|||
{
|
||||
struct aes_encdata *ae = privdata;
|
||||
cipherInstance cipher;
|
||||
int cipher_ok __diagused;
|
||||
|
||||
rijndael_cipherInit(&cipher, MODE_CBC, ae->ae_iv);
|
||||
cipher_ok = rijndael_cipherInit(&cipher, MODE_CBC, ae->ae_iv);
|
||||
KASSERT(cipher_ok > 0);
|
||||
rijndael_blockDecrypt(&cipher, ae->ae_key, src, len * 8, dst);
|
||||
(void)memcpy(ae->ae_iv, (const u_int8_t *)src + (len - 16), 16);
|
||||
}
|
||||
|
|
@ -247,11 +285,111 @@ cgd_cipher_aes_cbc(void *privdata, struct uio *dstuio,
|
|||
switch (dir) {
|
||||
case CGD_CIPHER_ENCRYPT:
|
||||
encd.ae_key = &apd->ap_enckey;
|
||||
cgd_cipher_uio_cbc(&encd, aes_cbc_enc_int, dstuio, srcuio);
|
||||
cgd_cipher_uio(&encd, aes_cbc_enc_int, dstuio, srcuio);
|
||||
break;
|
||||
case CGD_CIPHER_DECRYPT:
|
||||
encd.ae_key = &apd->ap_deckey;
|
||||
cgd_cipher_uio_cbc(&encd, aes_cbc_dec_int, dstuio, srcuio);
|
||||
cgd_cipher_uio(&encd, aes_cbc_dec_int, dstuio, srcuio);
|
||||
break;
|
||||
default:
|
||||
DIAGPANIC(("%s: unrecognised direction %d", __func__, dir));
|
||||
}
|
||||
}
|
||||
|
||||
static void *
|
||||
cgd_cipher_aes_xts_init(size_t keylen, const void *xtskey, size_t *blocksize)
|
||||
{
|
||||
struct aes_privdata *ap;
|
||||
const char *key, *key2; /* XTS key is made of two AES keys. */
|
||||
|
||||
if (!blocksize)
|
||||
return NULL;
|
||||
if (keylen != 256 && keylen != 512)
|
||||
return NULL;
|
||||
if (*blocksize == (size_t)-1)
|
||||
*blocksize = 128;
|
||||
if (*blocksize != 128)
|
||||
return NULL;
|
||||
ap = malloc(2 * sizeof(*ap), M_DEVBUF, 0);
|
||||
if (!ap)
|
||||
return NULL;
|
||||
|
||||
keylen /= 2;
|
||||
key = xtskey;
|
||||
key2 = key + keylen / CHAR_BIT;
|
||||
|
||||
rijndael_makeKey(&ap[0].ap_enckey, DIR_ENCRYPT, keylen, key);
|
||||
rijndael_makeKey(&ap[0].ap_deckey, DIR_DECRYPT, keylen, key);
|
||||
rijndael_makeKey(&ap[1].ap_enckey, DIR_ENCRYPT, keylen, key2);
|
||||
|
||||
return ap;
|
||||
}
|
||||
|
||||
static void
|
||||
cgd_cipher_aes_xts_destroy(void *data)
|
||||
{
|
||||
struct aes_privdata *apd = data;
|
||||
|
||||
explicit_memset(apd, 0, 2 * sizeof(*apd));
|
||||
free(apd, M_DEVBUF);
|
||||
}
|
||||
|
||||
static void
|
||||
cgd_cipher_aes_xts_prep(void *privdata, char *iv,
|
||||
const char *blkno_buf, size_t blocksize, int dir)
|
||||
{
|
||||
struct aes_privdata *apd = privdata;
|
||||
cipherInstance cipher;
|
||||
int cipher_ok __diagused;
|
||||
|
||||
cipher_ok = rijndael_cipherInit(&cipher, MODE_ECB, NULL);
|
||||
KASSERT(cipher_ok > 0);
|
||||
rijndael_blockEncrypt(&cipher, &apd[1].ap_enckey,
|
||||
blkno_buf, blocksize * 8, iv);
|
||||
}
|
||||
|
||||
static void
|
||||
aes_xts_enc_int(void *privdata, void *dst, const void *src, size_t len)
|
||||
{
|
||||
struct aes_encdata *ae = privdata;
|
||||
cipherInstance cipher;
|
||||
int cipher_ok __diagused;
|
||||
|
||||
cipher_ok = rijndael_cipherInit(&cipher, MODE_XTS, ae->ae_iv);
|
||||
KASSERT(cipher_ok > 0);
|
||||
rijndael_blockEncrypt(&cipher, ae->ae_key, src, len * 8, dst);
|
||||
(void)memcpy(ae->ae_iv, cipher.IV, 16);
|
||||
}
|
||||
|
||||
static void
|
||||
aes_xts_dec_int(void *privdata, void *dst, const void *src, size_t len)
|
||||
{
|
||||
struct aes_encdata *ae = privdata;
|
||||
cipherInstance cipher;
|
||||
int cipher_ok __diagused;
|
||||
|
||||
cipher_ok = rijndael_cipherInit(&cipher, MODE_XTS, ae->ae_iv);
|
||||
KASSERT(cipher_ok > 0);
|
||||
rijndael_blockDecrypt(&cipher, ae->ae_key, src, len * 8, dst);
|
||||
(void)memcpy(ae->ae_iv, cipher.IV, 16);
|
||||
}
|
||||
|
||||
static void
|
||||
cgd_cipher_aes_xts(void *privdata, struct uio *dstuio,
|
||||
struct uio *srcuio, const void *iv, int dir)
|
||||
{
|
||||
struct aes_privdata *apd = privdata;
|
||||
struct aes_encdata encd;
|
||||
|
||||
(void)memcpy(encd.ae_iv, iv, 16);
|
||||
switch (dir) {
|
||||
case CGD_CIPHER_ENCRYPT:
|
||||
encd.ae_key = &apd->ap_enckey;
|
||||
cgd_cipher_uio(&encd, aes_xts_enc_int, dstuio, srcuio);
|
||||
break;
|
||||
case CGD_CIPHER_DECRYPT:
|
||||
encd.ae_key = &apd->ap_deckey;
|
||||
cgd_cipher_uio(&encd, aes_xts_dec_int, dstuio, srcuio);
|
||||
break;
|
||||
default:
|
||||
DIAGPANIC(("%s: unrecognised direction %d", __func__, dir));
|
||||
|
|
@ -312,6 +450,20 @@ cgd_cipher_3des_destroy(void *data)
|
|||
free(cp, M_DEVBUF);
|
||||
}
|
||||
|
||||
static void
|
||||
cgd_cipher_3des_cbc_prep(void *privdata, char *iv,
|
||||
const char *blkno_buf, size_t blocksize, int dir)
|
||||
{
|
||||
struct c3des_privdata *cp = privdata;
|
||||
char zero_iv[8];
|
||||
|
||||
memset(zero_iv, 0, sizeof(zero_iv));
|
||||
des_ede3_cbc_encrypt(blkno_buf, iv, blocksize,
|
||||
cp->cp_key1, cp->cp_key2, cp->cp_key3, (des_cblock *)zero_iv, 1);
|
||||
if (blocksize > 8)
|
||||
(void)memmove(iv, iv + blocksize - 8, 8);
|
||||
}
|
||||
|
||||
static void
|
||||
c3des_cbc_enc_int(void *privdata, void *dst, const void *src, size_t len)
|
||||
{
|
||||
|
|
@ -345,10 +497,10 @@ cgd_cipher_3des_cbc(void *privdata, struct uio *dstuio,
|
|||
ce.ce_key3 = &cp->cp_key3;
|
||||
switch (dir) {
|
||||
case CGD_CIPHER_ENCRYPT:
|
||||
cgd_cipher_uio_cbc(&ce, c3des_cbc_enc_int, dstuio, srcuio);
|
||||
cgd_cipher_uio(&ce, c3des_cbc_enc_int, dstuio, srcuio);
|
||||
break;
|
||||
case CGD_CIPHER_DECRYPT:
|
||||
cgd_cipher_uio_cbc(&ce, c3des_cbc_dec_int, dstuio, srcuio);
|
||||
cgd_cipher_uio(&ce, c3des_cbc_dec_int, dstuio, srcuio);
|
||||
break;
|
||||
default:
|
||||
DIAGPANIC(("%s: unrecognised direction %d", __func__, dir));
|
||||
|
|
@ -397,6 +549,19 @@ cgd_cipher_bf_destroy(void *data)
|
|||
free(bp, M_DEVBUF);
|
||||
}
|
||||
|
||||
static void
|
||||
cgd_cipher_bf_cbc_prep(void *privdata, char *iv,
|
||||
const char *blkno_buf, size_t blocksize, int dir)
|
||||
{
|
||||
struct bf_privdata *bp = privdata;
|
||||
char zero_iv[8];
|
||||
|
||||
memset(zero_iv, 0, sizeof(zero_iv));
|
||||
BF_cbc_encrypt(blkno_buf, iv, blocksize, &bp->bp_key, zero_iv, 1);
|
||||
if (blocksize > 8)
|
||||
(void)memmove(iv, iv + blocksize - 8, 8);
|
||||
}
|
||||
|
||||
static void
|
||||
bf_cbc_enc_int(void *privdata, void *dst, const void *src, size_t len)
|
||||
{
|
||||
|
|
@ -426,10 +591,10 @@ cgd_cipher_bf_cbc(void *privdata, struct uio *dstuio,
|
|||
be.be_key = &bp->bp_key;
|
||||
switch (dir) {
|
||||
case CGD_CIPHER_ENCRYPT:
|
||||
cgd_cipher_uio_cbc(&be, bf_cbc_enc_int, dstuio, srcuio);
|
||||
cgd_cipher_uio(&be, bf_cbc_enc_int, dstuio, srcuio);
|
||||
break;
|
||||
case CGD_CIPHER_DECRYPT:
|
||||
cgd_cipher_uio_cbc(&be, bf_cbc_dec_int, dstuio, srcuio);
|
||||
cgd_cipher_uio(&be, bf_cbc_dec_int, dstuio, srcuio);
|
||||
break;
|
||||
default:
|
||||
DIAGPANIC(("%s: unrecognised direction %d", __func__, dir));
|
||||
|
|
|
|||
|
|
@ -1,4 +1,4 @@
|
|||
/* $NetBSD: cgd_crypto.h,v 1.8 2015/04/25 12:55:04 riastradh Exp $ */
|
||||
/* $NetBSD: cgd_crypto.h,v 1.9 2016/12/11 00:20:49 alnsn Exp $ */
|
||||
|
||||
/*-
|
||||
* Copyright (c) 2002 The NetBSD Foundation, Inc.
|
||||
|
|
@ -40,12 +40,14 @@ typedef void *(cfunc_init)(size_t, const void *, size_t *);
|
|||
typedef void (cfunc_destroy)(void *);
|
||||
typedef void (cfunc_cipher)(void *, struct uio *, struct uio *, const void *,
|
||||
int);
|
||||
typedef void (cfunc_cipher_prep)(void *, char *, const char *, size_t, int);
|
||||
|
||||
struct cryptfuncs {
|
||||
const char *cf_name; /* cipher name */
|
||||
cfunc_init *cf_init; /* Initialisation function */
|
||||
cfunc_destroy *cf_destroy; /* destruction function */
|
||||
cfunc_cipher *cf_cipher; /* the cipher itself */
|
||||
const char *cf_name; /* cipher name */
|
||||
cfunc_init *cf_init; /* Initialisation function */
|
||||
cfunc_destroy *cf_destroy; /* destruction function */
|
||||
cfunc_cipher *cf_cipher; /* the cipher itself */
|
||||
cfunc_cipher_prep *cf_cipher_prep; /* prepare to cipher */
|
||||
};
|
||||
|
||||
const struct cryptfuncs *cryptfuncs_find(const char *);
|
||||
|
|
|
|||
Loading…
Reference in New Issue