diff options
Diffstat (limited to 'sys/mips/cavium/cryptocteon/cryptocteon.c')
| -rw-r--r-- | sys/mips/cavium/cryptocteon/cryptocteon.c | 526 |
1 files changed, 526 insertions, 0 deletions
diff --git a/sys/mips/cavium/cryptocteon/cryptocteon.c b/sys/mips/cavium/cryptocteon/cryptocteon.c new file mode 100644 index 0000000..16a0bb1 --- /dev/null +++ b/sys/mips/cavium/cryptocteon/cryptocteon.c @@ -0,0 +1,526 @@ +/* + * Octeon Crypto for OCF + * + * Written by David McCullough <david_mccullough@securecomputing.com> + * Copyright (C) 2009 David McCullough + * + * LICENSE TERMS + * + * The free distribution and use of this software in both source and binary + * form is allowed (with or without changes) provided that: + * + * 1. distributions of this source code include the above copyright + * notice, this list of conditions and the following disclaimer; + * + * 2. distributions in binary form include the above copyright + * notice, this list of conditions and the following disclaimer + * in the documentation and/or other associated materials; + * + * 3. the copyright holder's name is not used to endorse products + * built using this software without specific written permission. + * + * DISCLAIMER + * + * This software is provided 'as is' with no explicit or implied warranties + * in respect of its properties, including, but not limited to, correctness + * and/or fitness for purpose. + * --------------------------------------------------------------------------- + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/bus.h> +#include <sys/kernel.h> +#include <sys/module.h> +#include <sys/malloc.h> +#include <sys/mbuf.h> +#include <sys/uio.h> + +#include <opencrypto/cryptodev.h> + +#include <contrib/octeon-sdk/cvmx.h> + +#include <mips/cavium/cryptocteon/cryptocteonvar.h> + +#include "cryptodev_if.h" + +struct cryptocteon_softc { + int32_t sc_cid; /* opencrypto id */ + struct octo_sess **sc_sessions; + uint32_t sc_sesnum; +}; + +int cryptocteon_debug = 0; +TUNABLE_INT("hw.cryptocteon.debug", &cryptocteon_debug); + +static void cryptocteon_identify(driver_t *, device_t); +static int cryptocteon_probe(device_t); +static int cryptocteon_attach(device_t); + +static int cryptocteon_process(device_t, struct cryptop *, int); +static int cryptocteon_newsession(device_t, u_int32_t *, struct cryptoini *); +static int cryptocteon_freesession(device_t, u_int64_t); + +static void +cryptocteon_identify(driver_t *drv, device_t parent) +{ + if (octeon_has_feature(OCTEON_FEATURE_CRYPTO)) + BUS_ADD_CHILD(parent, 0, "cryptocteon", 0); +} + +static int +cryptocteon_probe(device_t dev) +{ + device_set_desc(dev, "Octeon Secure Coprocessor"); + return (0); +} + +static int +cryptocteon_attach(device_t dev) +{ + struct cryptocteon_softc *sc; + + sc = device_get_softc(dev); + + sc->sc_cid = crypto_get_driverid(dev, CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SYNC); + if (sc->sc_cid < 0) { + device_printf(dev, "crypto_get_driverid ret %d\n", sc->sc_cid); + return (ENXIO); + } + + crypto_register(sc->sc_cid, CRYPTO_MD5_HMAC, 0, 0); + crypto_register(sc->sc_cid, CRYPTO_SHA1_HMAC, 0, 0); + crypto_register(sc->sc_cid, CRYPTO_DES_CBC, 0, 0); + crypto_register(sc->sc_cid, CRYPTO_3DES_CBC, 0, 0); + crypto_register(sc->sc_cid, CRYPTO_AES_CBC, 0, 0); + + return (0); +} + +/* + * Generate a new octo session. We artifically limit it to a single + * hash/cipher or hash-cipher combo just to make it easier, most callers + * do not expect more than this anyway. + */ +static int +cryptocteon_newsession(device_t dev, u_int32_t *sid, struct cryptoini *cri) +{ + struct cryptoini *c, *encini = NULL, *macini = NULL; + struct cryptocteon_softc *sc; + struct octo_sess **ocd; + int i; + + sc = device_get_softc(dev); + + if (sid == NULL || cri == NULL || sc == NULL) + return (EINVAL); + + /* + * To keep it simple, we only handle hash, cipher or hash/cipher in a + * session, you cannot currently do multiple ciphers/hashes in one + * session even though it would be possibel to code this driver to + * handle it. + */ + for (i = 0, c = cri; c && i < 2; i++) { + if (c->cri_alg == CRYPTO_MD5_HMAC || + c->cri_alg == CRYPTO_SHA1_HMAC || + c->cri_alg == CRYPTO_NULL_HMAC) { + if (macini) { + break; + } + macini = c; + } + if (c->cri_alg == CRYPTO_DES_CBC || + c->cri_alg == CRYPTO_3DES_CBC || + c->cri_alg == CRYPTO_AES_CBC || + c->cri_alg == CRYPTO_NULL_CBC) { + if (encini) { + break; + } + encini = c; + } + c = c->cri_next; + } + if (!macini && !encini) { + dprintf("%s,%d - EINVAL bad cipher/hash or combination\n", + __FILE__, __LINE__); + return EINVAL; + } + if (c) { + dprintf("%s,%d - EINVAL cannot handle chained cipher/hash combos\n", + __FILE__, __LINE__); + return EINVAL; + } + + /* + * So we have something we can do, lets setup the session + */ + + if (sc->sc_sessions) { + for (i = 1; i < sc->sc_sesnum; i++) + if (sc->sc_sessions[i] == NULL) + break; + } else + i = 1; /* NB: to silence compiler warning */ + + if (sc->sc_sessions == NULL || i == sc->sc_sesnum) { + if (sc->sc_sessions == NULL) { + i = 1; /* We leave sc->sc_sessions[0] empty */ + sc->sc_sesnum = CRYPTO_SW_SESSIONS; + } else + sc->sc_sesnum *= 2; + + ocd = malloc(sc->sc_sesnum * sizeof(struct octo_sess *), + M_DEVBUF, M_NOWAIT | M_ZERO); + if (ocd == NULL) { + /* Reset session number */ + if (sc->sc_sesnum == CRYPTO_SW_SESSIONS) + sc->sc_sesnum = 0; + else + sc->sc_sesnum /= 2; + dprintf("%s,%d: ENOBUFS\n", __FILE__, __LINE__); + return ENOBUFS; + } + + /* Copy existing sessions */ + if (sc->sc_sessions) { + memcpy(ocd, sc->sc_sessions, + (sc->sc_sesnum / 2) * sizeof(struct octo_sess *)); + free(sc->sc_sessions, M_DEVBUF); + } + + sc->sc_sessions = ocd; + } + + ocd = &sc->sc_sessions[i]; + *sid = i; + + *ocd = malloc(sizeof(struct octo_sess), M_DEVBUF, M_NOWAIT | M_ZERO); + if (*ocd == NULL) { + cryptocteon_freesession(NULL, i); + dprintf("%s,%d: ENOBUFS\n", __FILE__, __LINE__); + return ENOBUFS; + } + + if (encini && encini->cri_key) { + (*ocd)->octo_encklen = (encini->cri_klen + 7) / 8; + memcpy((*ocd)->octo_enckey, encini->cri_key, (*ocd)->octo_encklen); + } + + if (macini && macini->cri_key) { + (*ocd)->octo_macklen = (macini->cri_klen + 7) / 8; + memcpy((*ocd)->octo_mackey, macini->cri_key, (*ocd)->octo_macklen); + } + + (*ocd)->octo_mlen = 0; + if (encini && encini->cri_mlen) + (*ocd)->octo_mlen = encini->cri_mlen; + else if (macini && macini->cri_mlen) + (*ocd)->octo_mlen = macini->cri_mlen; + else + (*ocd)->octo_mlen = 12; + + /* + * point c at the enc if it exists, otherwise the mac + */ + c = encini ? encini : macini; + + switch (c->cri_alg) { + case CRYPTO_DES_CBC: + case CRYPTO_3DES_CBC: + (*ocd)->octo_ivsize = 8; + switch (macini ? macini->cri_alg : -1) { + case CRYPTO_MD5_HMAC: + (*ocd)->octo_encrypt = octo_des_cbc_md5_encrypt; + (*ocd)->octo_decrypt = octo_des_cbc_md5_decrypt; + octo_calc_hash(0, macini->cri_key, (*ocd)->octo_hminner, + (*ocd)->octo_hmouter); + break; + case CRYPTO_SHA1_HMAC: + (*ocd)->octo_encrypt = octo_des_cbc_sha1_encrypt; + (*ocd)->octo_decrypt = octo_des_cbc_sha1_encrypt; + octo_calc_hash(1, macini->cri_key, (*ocd)->octo_hminner, + (*ocd)->octo_hmouter); + break; + case -1: + (*ocd)->octo_encrypt = octo_des_cbc_encrypt; + (*ocd)->octo_decrypt = octo_des_cbc_decrypt; + break; + default: + cryptocteon_freesession(NULL, i); + dprintf("%s,%d: EINVALn", __FILE__, __LINE__); + return EINVAL; + } + break; + case CRYPTO_AES_CBC: + (*ocd)->octo_ivsize = 16; + switch (macini ? macini->cri_alg : -1) { + case CRYPTO_MD5_HMAC: + (*ocd)->octo_encrypt = octo_aes_cbc_md5_encrypt; + (*ocd)->octo_decrypt = octo_aes_cbc_md5_decrypt; + octo_calc_hash(0, macini->cri_key, (*ocd)->octo_hminner, + (*ocd)->octo_hmouter); + break; + case CRYPTO_SHA1_HMAC: + (*ocd)->octo_encrypt = octo_aes_cbc_sha1_encrypt; + (*ocd)->octo_decrypt = octo_aes_cbc_sha1_decrypt; + octo_calc_hash(1, macini->cri_key, (*ocd)->octo_hminner, + (*ocd)->octo_hmouter); + break; + case -1: + (*ocd)->octo_encrypt = octo_aes_cbc_encrypt; + (*ocd)->octo_decrypt = octo_aes_cbc_decrypt; + break; + default: + cryptocteon_freesession(NULL, i); + dprintf("%s,%d: EINVALn", __FILE__, __LINE__); + return EINVAL; + } + break; + case CRYPTO_MD5_HMAC: + (*ocd)->octo_encrypt = octo_null_md5_encrypt; + (*ocd)->octo_decrypt = octo_null_md5_encrypt; + octo_calc_hash(0, macini->cri_key, (*ocd)->octo_hminner, + (*ocd)->octo_hmouter); + break; + case CRYPTO_SHA1_HMAC: + (*ocd)->octo_encrypt = octo_null_sha1_encrypt; + (*ocd)->octo_decrypt = octo_null_sha1_encrypt; + octo_calc_hash(1, macini->cri_key, (*ocd)->octo_hminner, + (*ocd)->octo_hmouter); + break; + default: + cryptocteon_freesession(NULL, i); + dprintf("%s,%d: EINVALn", __FILE__, __LINE__); + return EINVAL; + } + + (*ocd)->octo_encalg = encini ? encini->cri_alg : -1; + (*ocd)->octo_macalg = macini ? macini->cri_alg : -1; + + return 0; +} + +/* + * Free a session. + */ +static int +cryptocteon_freesession(device_t dev, u_int64_t tid) +{ + struct cryptocteon_softc *sc; + u_int32_t sid = CRYPTO_SESID2LID(tid); + + sc = device_get_softc(dev); + + if (sc == NULL) + return (EINVAL); + + if (sid > sc->sc_sesnum || sc->sc_sessions == NULL || + sc->sc_sessions[sid] == NULL) + return (EINVAL); + + /* Silently accept and return */ + if (sid == 0) + return(0); + + if (sc->sc_sessions[sid]) + free(sc->sc_sessions[sid], M_DEVBUF); + sc->sc_sessions[sid] = NULL; + return 0; +} + +/* + * Process a request. + */ +static int +cryptocteon_process(device_t dev, struct cryptop *crp, int hint) +{ + struct cryptodesc *crd; + struct octo_sess *od; + u_int32_t lid; + size_t iovcnt, iovlen; + struct mbuf *m = NULL; + struct uio *uiop = NULL; + struct cryptodesc *enccrd = NULL, *maccrd = NULL; + unsigned char *ivp = NULL; + unsigned char iv_data[HASH_MAX_LEN]; + int auth_off = 0, auth_len = 0, crypt_off = 0, crypt_len = 0, icv_off = 0; + struct cryptocteon_softc *sc; + + sc = device_get_softc(dev); + + if (sc == NULL || crp == NULL) + return EINVAL; + + crp->crp_etype = 0; + + if (crp->crp_desc == NULL || crp->crp_buf == NULL) { + dprintf("%s,%d: EINVAL\n", __FILE__, __LINE__); + crp->crp_etype = EINVAL; + goto done; + } + + lid = crp->crp_sid & 0xffffffff; + if (lid >= sc->sc_sesnum || lid == 0 || sc->sc_sessions == NULL || + sc->sc_sessions[lid] == NULL) { + crp->crp_etype = ENOENT; + dprintf("%s,%d: ENOENT\n", __FILE__, __LINE__); + goto done; + } + od = sc->sc_sessions[lid]; + + /* + * do some error checking outside of the loop for m and IOV processing + * this leaves us with valid m or uiop pointers for later + */ + if (crp->crp_flags & CRYPTO_F_IMBUF) { + unsigned frags; + + m = (struct mbuf *) crp->crp_buf; + for (frags = 0; m != NULL; frags++) + m = m->m_next; + + if (frags >= UIO_MAXIOV) { + printf("%s,%d: %d frags > UIO_MAXIOV", __FILE__, __LINE__, frags); + goto done; + } + + m = (struct mbuf *) crp->crp_buf; + } else if (crp->crp_flags & CRYPTO_F_IOV) { + uiop = (struct uio *) crp->crp_buf; + if (uiop->uio_iovcnt > UIO_MAXIOV) { + printf("%s,%d: %d uio_iovcnt > UIO_MAXIOV", __FILE__, __LINE__, + uiop->uio_iovcnt); + goto done; + } + } + + /* point our enccrd and maccrd appropriately */ + crd = crp->crp_desc; + if (crd->crd_alg == od->octo_encalg) enccrd = crd; + if (crd->crd_alg == od->octo_macalg) maccrd = crd; + crd = crd->crd_next; + if (crd) { + if (crd->crd_alg == od->octo_encalg) enccrd = crd; + if (crd->crd_alg == od->octo_macalg) maccrd = crd; + crd = crd->crd_next; + } + if (crd) { + crp->crp_etype = EINVAL; + dprintf("%s,%d: ENOENT - descriptors do not match session\n", + __FILE__, __LINE__); + goto done; + } + + if (enccrd) { + if (enccrd->crd_flags & CRD_F_IV_EXPLICIT) { + ivp = enccrd->crd_iv; + } else { + ivp = iv_data; + crypto_copydata(crp->crp_flags, crp->crp_buf, + enccrd->crd_inject, od->octo_ivsize, (caddr_t) ivp); + } + + if (maccrd) { + auth_off = maccrd->crd_skip; + auth_len = maccrd->crd_len; + icv_off = maccrd->crd_inject; + } + + crypt_off = enccrd->crd_skip; + crypt_len = enccrd->crd_len; + } else { /* if (maccrd) */ + auth_off = maccrd->crd_skip; + auth_len = maccrd->crd_len; + icv_off = maccrd->crd_inject; + } + + /* + * setup the I/O vector to cover the buffer + */ + if (crp->crp_flags & CRYPTO_F_IMBUF) { + iovcnt = 0; + iovlen = 0; + + while (m != NULL) { + od->octo_iov[iovcnt].iov_base = mtod(m, void *); + od->octo_iov[iovcnt].iov_len = m->m_len; + + m = m->m_next; + iovlen += od->octo_iov[iovcnt++].iov_len; + } + } else if (crp->crp_flags & CRYPTO_F_IOV) { + iovlen = 0; + for (iovcnt = 0; iovcnt < uiop->uio_iovcnt; iovcnt++) { + od->octo_iov[iovcnt].iov_base = uiop->uio_iov[iovcnt].iov_base; + od->octo_iov[iovcnt].iov_len = uiop->uio_iov[iovcnt].iov_len; + + iovlen += od->octo_iov[iovcnt].iov_len; + } + } else { + iovlen = crp->crp_ilen; + od->octo_iov[0].iov_base = crp->crp_buf; + od->octo_iov[0].iov_len = crp->crp_ilen; + iovcnt = 1; + } + + + /* + * setup a new explicit key + */ + if (enccrd) { + if (enccrd->crd_flags & CRD_F_KEY_EXPLICIT) { + od->octo_encklen = (enccrd->crd_klen + 7) / 8; + memcpy(od->octo_enckey, enccrd->crd_key, od->octo_encklen); + } + } + if (maccrd) { + if (maccrd->crd_flags & CRD_F_KEY_EXPLICIT) { + od->octo_macklen = (maccrd->crd_klen + 7) / 8; + memcpy(od->octo_mackey, maccrd->crd_key, od->octo_macklen); + od->octo_mackey_set = 0; + } + if (!od->octo_mackey_set) { + octo_calc_hash(maccrd->crd_alg == CRYPTO_MD5_HMAC ? 0 : 1, + maccrd->crd_key, od->octo_hminner, od->octo_hmouter); + od->octo_mackey_set = 1; + } + } + + + if (!enccrd || (enccrd->crd_flags & CRD_F_ENCRYPT)) + (*od->octo_encrypt)(od, od->octo_iov, iovcnt, iovlen, + auth_off, auth_len, crypt_off, crypt_len, icv_off, ivp); + else + (*od->octo_decrypt)(od, od->octo_iov, iovcnt, iovlen, + auth_off, auth_len, crypt_off, crypt_len, icv_off, ivp); + +done: + crypto_done(crp); + return 0; +} + +static device_method_t cryptocteon_methods[] = { + /* device methods */ + DEVMETHOD(device_identify, cryptocteon_identify), + DEVMETHOD(device_probe, cryptocteon_probe), + DEVMETHOD(device_attach, cryptocteon_attach), + + /* crypto device methods */ + DEVMETHOD(cryptodev_newsession, cryptocteon_newsession), + DEVMETHOD(cryptodev_freesession,cryptocteon_freesession), + DEVMETHOD(cryptodev_process, cryptocteon_process), + + { 0, 0 } +}; + +static driver_t cryptocteon_driver = { + "cryptocteon", + cryptocteon_methods, + sizeof (struct cryptocteon_softc), +}; +static devclass_t cryptocteon_devclass; +DRIVER_MODULE(cryptocteon, nexus, cryptocteon_driver, cryptocteon_devclass, 0, 0); |
