diff options
Diffstat (limited to 'crypto/engine/hw_ncipher.c')
| -rw-r--r-- | crypto/engine/hw_ncipher.c | 1018 |
1 files changed, 1018 insertions, 0 deletions
diff --git a/crypto/engine/hw_ncipher.c b/crypto/engine/hw_ncipher.c new file mode 100644 index 0000000000..f6b06e468f --- /dev/null +++ b/crypto/engine/hw_ncipher.c @@ -0,0 +1,1018 @@ +/* crypto/engine/hw_ncipher.c -*- mode: C; c-file-style: "eay" -*- */ +/* Written by Richard Levitte (richard@levitte.org), Geoff Thorpe + * (geoff@geoffthorpe.net) and Dr Stephen N Henson (shenson@bigfoot.com) + * for the OpenSSL project 2000. + */ +/* ==================================================================== + * Copyright (c) 1999 The OpenSSL 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. All advertising materials mentioning features or use of this + * software must display the following acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" + * + * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For written permission, please contact + * licensing@OpenSSL.org. + * + * 5. Products derived from this software may not be called "OpenSSL" + * nor may "OpenSSL" appear in their names without prior written + * permission of the OpenSSL Project. + * + * 6. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" + * + * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY + * EXPRESSED 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 OpenSSL PROJECT OR + * ITS 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. + * ==================================================================== + * + * This product includes cryptographic software written by Eric Young + * (eay@cryptsoft.com). This product includes software written by Tim + * Hudson (tjh@cryptsoft.com). + * + */ + +#include <stdio.h> +#include <openssl/crypto.h> +#include <openssl/pem.h> +#include "cryptlib.h" +#include <openssl/dso.h> +#include "engine_int.h" +#include <openssl/engine.h> + +#ifndef NO_HW +#ifndef NO_HW_NCIPHER + +/* Attribution notice: nCipher have said several times that it's OK for + * us to implement a general interface to their boxes, and recently declared + * their HWCryptoHook to be public, and therefore available for us to use. + * Thanks, nCipher. + * + * The hwcryptohook.h included here is from May 2000. + * [Richard Levitte] + */ +#ifdef FLAT_INC +#include "hwcryptohook.h" +#else +#include "vendor_defns/hwcryptohook.h" +#endif + +static int hwcrhk_init(void); +static int hwcrhk_finish(void); +static int hwcrhk_ctrl(int cmd, long i, void *p, void (*f)()); + +/* Functions to handle mutexes */ +static int hwcrhk_mutex_init(HWCryptoHook_Mutex*, HWCryptoHook_CallerContext*); +static int hwcrhk_mutex_lock(HWCryptoHook_Mutex*); +static void hwcrhk_mutex_unlock(HWCryptoHook_Mutex*); +static void hwcrhk_mutex_destroy(HWCryptoHook_Mutex*); + +/* BIGNUM stuff */ +static int hwcrhk_mod_exp(BIGNUM *r, BIGNUM *a, const BIGNUM *p, + const BIGNUM *m, BN_CTX *ctx); + +/* RSA stuff */ +static int hwcrhk_rsa_mod_exp(BIGNUM *r, BIGNUM *I, RSA *rsa); +/* This function is aliased to mod_exp (with the mont stuff dropped). */ +static int hwcrhk_mod_exp_mont(BIGNUM *r, BIGNUM *a, const BIGNUM *p, + const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx); + +/* DH stuff */ +/* This function is alised to mod_exp (with the DH and mont dropped). */ +static int hwcrhk_mod_exp_dh(DH *dh, BIGNUM *r, BIGNUM *a, const BIGNUM *p, + const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx); + +/* RAND stuff */ +static int hwcrhk_rand_bytes(unsigned char *buf, int num); +static int hwcrhk_rand_status(void); + +/* KM stuff */ +static EVP_PKEY *hwcrhk_load_privkey(const char *key_id, + const char *passphrase); +static EVP_PKEY *hwcrhk_load_pubkey(const char *key_id, + const char *passphrase); +static void hwcrhk_ex_free(void *obj, void *item, CRYPTO_EX_DATA *ad, + int ind,long argl, void *argp); + +/* Interaction stuff */ +static int hwcrhk_get_pass(const char *prompt_info, + int *len_io, char *buf, + HWCryptoHook_PassphraseContext *ppctx, + HWCryptoHook_CallerContext *cactx); +static void hwcrhk_log_message(void *logstr, const char *message); + +/* Our internal RSA_METHOD that we provide pointers to */ +static RSA_METHOD hwcrhk_rsa = + { + "nCipher RSA method", + NULL, + NULL, + NULL, + NULL, + hwcrhk_rsa_mod_exp, + hwcrhk_mod_exp_mont, + NULL, + NULL, + 0, + NULL, + NULL, + NULL + }; + +/* Our internal DH_METHOD that we provide pointers to */ +static DH_METHOD hwcrhk_dh = + { + "nCipher DH method", + NULL, + NULL, + hwcrhk_mod_exp_dh, + NULL, + NULL, + 0, + NULL + }; + +static RAND_METHOD hwcrhk_rand = + { + /* "nCipher RAND method", */ + NULL, + hwcrhk_rand_bytes, + NULL, + NULL, + hwcrhk_rand_bytes, + hwcrhk_rand_status, + }; + +/* Our ENGINE structure. */ +static ENGINE engine_hwcrhk = + { + "chil", + "nCipher hardware engine support", + &hwcrhk_rsa, + NULL, + &hwcrhk_dh, + &hwcrhk_rand, + hwcrhk_mod_exp, + NULL, + hwcrhk_init, + hwcrhk_finish, + hwcrhk_ctrl, + hwcrhk_load_privkey, + hwcrhk_load_pubkey, + 0, /* no flags */ + 0, 0, /* no references */ + NULL, NULL /* unlinked */ + }; + +/* Internal stuff for HWCryptoHook */ + +/* Some structures needed for proper use of thread locks */ +/* hwcryptohook.h has some typedefs that turn struct HWCryptoHook_MutexValue + into HWCryptoHook_Mutex */ +struct HWCryptoHook_MutexValue + { + int lockid; + }; + +/* hwcryptohook.h has some typedefs that turn + struct HWCryptoHook_PassphraseContextValue + into HWCryptoHook_PassphraseContext */ +struct HWCryptoHook_PassphraseContextValue + { + void *any; + }; + +/* hwcryptohook.h has some typedefs that turn + struct HWCryptoHook_CallerContextValue + into HWCryptoHook_CallerContext */ +struct HWCryptoHook_CallerContextValue + { + void *any; + }; + +/* The MPI structure in HWCryptoHook is pretty compatible with OpenSSL + BIGNUM's, so lets define a couple of conversion macros */ +#define BN2MPI(mp, bn) \ + {mp.size = bn->top * sizeof(BN_ULONG); mp.buf = (unsigned char *)bn->d;} +#define MPI2BN(bn, mp) \ + {mp.size = bn->dmax * sizeof(BN_ULONG); mp.buf = (unsigned char *)bn->d;} + +#if 0 /* Card and password management is not yet supported */ +/* HWCryptoHook callbacks. insert_card() and get_pass() are not yet + defined, because we haven't quite decided on the proper form yet. + log_message() just adds an entry in the error stack. I don't know + if that's good or bad... */ +static int insert_card(const char *prompt_info, + const char *wrong_info, + HWCryptoHook_PassphraseContext *ppctx, + HWCryptoHook_CallerContext *cactx); +static int get_pass(const char *prompt_info, + int *len_io, char *buf, + HWCryptoHook_PassphraseContext *ppctx, + HWCryptoHook_CallerContext *cactx); +#endif + +static BIO *logstream = NULL; +static pem_password_cb *password_callback = NULL; +#if 0 +static void *password_callback_userdata = NULL; +#endif +static int disable_mutex_callbacks = 0; + +/* Stuff to pass to the HWCryptoHook library */ +static HWCryptoHook_InitInfo hwcrhk_globals = { + 0, /* Flags */ + &logstream, /* logstream */ + sizeof(BN_ULONG), /* limbsize */ + 0, /* mslimb first: false for BNs */ + -1, /* msbyte first: use native */ + 0, /* Max mutexes, 0 = no small limit */ + 0, /* Max simultaneous, 0 = default */ + + /* The next few are mutex stuff: we write wrapper functions + around the OS mutex functions. We initialise them to 0 + here, and change that to actual function pointers in hwcrhk_init() + if dynamic locks are supported (that is, if the application + programmer has made sure of setting up callbacks bafore starting + this engine) *and* if disable_mutex_callbacks hasn't been set by + a call to ENGINE_ctrl(ENGINE_CTRL_CHIL_NO_LOCKING). */ + sizeof(HWCryptoHook_Mutex), + 0, + 0, + 0, + 0, + + /* The next few are condvar stuff: we write wrapper functions + round the OS functions. Currently not implemented and not + and absolute necessity even in threaded programs, therefore + 0'ed. Will hopefully be implemented some day, since it + enhances the efficiency of HWCryptoHook. */ + 0, /* sizeof(HWCryptoHook_CondVar), */ + 0, /* hwcrhk_cv_init, */ + 0, /* hwcrhk_cv_wait, */ + 0, /* hwcrhk_cv_signal, */ + 0, /* hwcrhk_cv_broadcast, */ + 0, /* hwcrhk_cv_destroy, */ + + hwcrhk_get_pass, /* pass phrase */ + 0, /* insert_card, */ /* insert a card */ + hwcrhk_log_message /* Log message */ +}; + + +/* Now, to our own code */ + +/* As this is only ever called once, there's no need for locking + * (indeed - the lock will already be held by our caller!!!) */ +ENGINE *ENGINE_ncipher() + { + RSA_METHOD *meth1; + DH_METHOD *meth2; + + /* We know that the "PKCS1_SSLeay()" functions hook properly + * to the cswift-specific mod_exp and mod_exp_crt so we use + * those functions. NB: We don't use ENGINE_openssl() or + * anything "more generic" because something like the RSAref + * code may not hook properly, and if you own one of these + * cards then you have the right to do RSA operations on it + * anyway! */ + meth1 = RSA_PKCS1_SSLeay(); + hwcrhk_rsa.rsa_pub_enc = meth1->rsa_pub_enc; + hwcrhk_rsa.rsa_pub_dec = meth1->rsa_pub_dec; + hwcrhk_rsa.rsa_priv_enc = meth1->rsa_priv_enc; + hwcrhk_rsa.rsa_priv_dec = meth1->rsa_priv_dec; + + /* Much the same for Diffie-Hellman */ + meth2 = DH_OpenSSL(); + hwcrhk_dh.generate_key = meth2->generate_key; + hwcrhk_dh.compute_key = meth2->compute_key; + return &engine_hwcrhk; + } + +/* This is a process-global DSO handle used for loading and unloading + * the HWCryptoHook library. NB: This is only set (or unset) during an + * init() or finish() call (reference counts permitting) and they're + * operating with global locks, so this should be thread-safe + * implicitly. */ +static DSO *hwcrhk_dso = NULL; +static HWCryptoHook_ContextHandle hwcrhk_context = 0; +static int hndidx = -1; /* Index for KM handle. Not really used yet. */ + +/* These are the function pointers that are (un)set when the library has + * successfully (un)loaded. */ +static HWCryptoHook_Init_t *p_hwcrhk_Init = NULL; +static HWCryptoHook_Finish_t *p_hwcrhk_Finish = NULL; +static HWCryptoHook_ModExp_t *p_hwcrhk_ModExp = NULL; +static HWCryptoHook_RSA_t *p_hwcrhk_RSA = NULL; +static HWCryptoHook_RandomBytes_t *p_hwcrhk_RandomBytes = NULL; +static HWCryptoHook_RSALoadKey_t *p_hwcrhk_RSALoadKey = NULL; +static HWCryptoHook_RSAGetPublicKey_t *p_hwcrhk_RSAGetPublicKey = NULL; +static HWCryptoHook_RSAUnloadKey_t *p_hwcrhk_RSAUnloadKey = NULL; +static HWCryptoHook_ModExpCRT_t *p_hwcrhk_ModExpCRT = NULL; + +/* Used in the DSO operations. */ +static const char *HWCRHK_LIBNAME = "nfhwcrhk"; +static const char *n_hwcrhk_Init = "HWCryptoHook_Init"; +static const char *n_hwcrhk_Finish = "HWCryptoHook_Finish"; +static const char *n_hwcrhk_ModExp = "HWCryptoHook_ModExp"; +static const char *n_hwcrhk_RSA = "HWCryptoHook_RSA"; +static const char *n_hwcrhk_RandomBytes = "HWCryptoHook_RandomBytes"; +static const char *n_hwcrhk_RSALoadKey = "HWCryptoHook_RSALoadKey"; +static const char *n_hwcrhk_RSAGetPublicKey = "HWCryptoHook_RSAGetPublicKey"; +static const char *n_hwcrhk_RSAUnloadKey = "HWCryptoHook_RSAUnloadKey"; +static const char *n_hwcrhk_ModExpCRT = "HWCryptoHook_ModExpCRT"; + +/* HWCryptoHook library functions and mechanics - these are used by the + * higher-level functions further down. NB: As and where there's no + * error checking, take a look lower down where these functions are + * called, the checking and error handling is probably down there. */ + +/* utility function to obtain a context */ +static int get_context(HWCryptoHook_ContextHandle *hac) + { + char tempbuf[1024]; + HWCryptoHook_ErrMsgBuf rmsg; + + rmsg.buf = tempbuf; + rmsg.size = 1024; + + *hac = p_hwcrhk_Init(&hwcrhk_globals, sizeof(hwcrhk_globals), &rmsg, + NULL); + if (!*hac) + return 0; + return 1; + } + +/* similarly to release one. */ +static void release_context(HWCryptoHook_ContextHandle hac) + { + p_hwcrhk_Finish(hac); + } + +/* (de)initialisation functions. */ +static int hwcrhk_init() + { + HWCryptoHook_Init_t *p1; + HWCryptoHook_Finish_t *p2; + HWCryptoHook_ModExp_t *p3; + HWCryptoHook_RSA_t *p4; + HWCryptoHook_RSALoadKey_t *p5; + HWCryptoHook_RSAGetPublicKey_t *p6; + HWCryptoHook_RSAUnloadKey_t *p7; + HWCryptoHook_RandomBytes_t *p8; + HWCryptoHook_ModExpCRT_t *p9; + + if(hwcrhk_dso != NULL) + { + ENGINEerr(ENGINE_F_HWCRHK_INIT,ENGINE_R_ALREADY_LOADED); + goto err; + } + /* Attempt to load libnfhwcrhk.so/nfhwcrhk.dll/whatever. */ + hwcrhk_dso = DSO_load(NULL, HWCRHK_LIBNAME, NULL, 0); + if(hwcrhk_dso == NULL) + { + ENGINEerr(ENGINE_F_HWCRHK_INIT,ENGINE_R_DSO_FAILURE); + goto err; + } + if(!(p1 = (HWCryptoHook_Init_t *) + DSO_bind_func(hwcrhk_dso, n_hwcrhk_Init)) || + !(p2 = (HWCryptoHook_Finish_t *) + DSO_bind_func(hwcrhk_dso, n_hwcrhk_Finish)) || + !(p3 = (HWCryptoHook_ModExp_t *) + DSO_bind_func(hwcrhk_dso, n_hwcrhk_ModExp)) || + !(p4 = (HWCryptoHook_RSA_t *) + DSO_bind_func(hwcrhk_dso, n_hwcrhk_RSA)) || + !(p5 = (HWCryptoHook_RSALoadKey_t *) + DSO_bind_func(hwcrhk_dso, n_hwcrhk_RSALoadKey)) || + !(p6 = (HWCryptoHook_RSAGetPublicKey_t *) + DSO_bind_func(hwcrhk_dso, n_hwcrhk_RSAGetPublicKey)) || + !(p7 = (HWCryptoHook_RSAUnloadKey_t *) + DSO_bind_func(hwcrhk_dso, n_hwcrhk_RSAUnloadKey)) || + !(p8 = (HWCryptoHook_RandomBytes_t *) + DSO_bind_func(hwcrhk_dso, n_hwcrhk_RandomBytes)) || + !(p9 = (HWCryptoHook_ModExpCRT_t *) + DSO_bind_func(hwcrhk_dso, n_hwcrhk_ModExpCRT))) + { + ENGINEerr(ENGINE_F_HWCRHK_INIT,ENGINE_R_DSO_FAILURE); + goto err; + } + /* Copy the pointers */ + p_hwcrhk_Init = p1; + p_hwcrhk_Finish = p2; + p_hwcrhk_ModExp = p3; + p_hwcrhk_RSA = p4; + p_hwcrhk_RSALoadKey = p5; + p_hwcrhk_RSAGetPublicKey = p6; + p_hwcrhk_RSAUnloadKey = p7; + p_hwcrhk_RandomBytes = p8; + p_hwcrhk_ModExpCRT = p9; + + /* Check if the application decided to support dynamic locks, + and if it does, use them. */ + if (disable_mutex_callbacks == 0 && + CRYPTO_get_dynlock_create_callback() != NULL && + CRYPTO_get_dynlock_lock_callback() != NULL && + CRYPTO_get_dynlock_destroy_callback() != NULL) + { + hwcrhk_globals.mutex_init = hwcrhk_mutex_init; + hwcrhk_globals.mutex_acquire = hwcrhk_mutex_lock; + hwcrhk_globals.mutex_release = hwcrhk_mutex_unlock; + hwcrhk_globals.mutex_destroy = hwcrhk_mutex_destroy; + } + + /* Try and get a context - if not, we may have a DSO but no + * accelerator! */ + if(!get_context(&hwcrhk_context)) + { + ENGINEerr(ENGINE_F_HWCRHK_INIT,ENGINE_R_UNIT_FAILURE); + goto err; + } + /* Everything's fine. */ + if (hndidx == -1) + hndidx = RSA_get_ex_new_index(0, + "nFast HWCryptoHook RSA key handle", + NULL, NULL, hwcrhk_ex_free); + return 1; +err: + if(hwcrhk_dso) + DSO_free(hwcrhk_dso); + hwcrhk_dso = NULL; + p_hwcrhk_Init = NULL; + p_hwcrhk_Finish = NULL; + p_hwcrhk_ModExp = NULL; + p_hwcrhk_RSA = NULL; + p_hwcrhk_RSALoadKey = NULL; + p_hwcrhk_RSAGetPublicKey = NULL; + p_hwcrhk_RSAUnloadKey = NULL; + p_hwcrhk_ModExpCRT = NULL; + p_hwcrhk_RandomBytes = NULL; + return 0; + } + +static int hwcrhk_finish() + { + int to_return = 1; + if(hwcrhk_dso == NULL) + { + ENGINEerr(ENGINE_F_HWCRHK_FINISH,ENGINE_R_NOT_LOADED); + to_return = 0; + goto err; + } + release_context(hwcrhk_context); + if(!DSO_free(hwcrhk_dso)) + { + ENGINEerr(ENGINE_F_HWCRHK_FINISH,ENGINE_R_DSO_FAILURE); + to_return = 0; + goto err; + } + err: + if (logstream) + BIO_free(logstream); + hwcrhk_dso = NULL; + p_hwcrhk_Init = NULL; + p_hwcrhk_Finish = NULL; + p_hwcrhk_ModExp = NULL; + p_hwcrhk_RSA = NULL; + p_hwcrhk_RSALoadKey = NULL; + p_hwcrhk_RSAGetPublicKey = NULL; + p_hwcrhk_RSAUnloadKey = NULL; + p_hwcrhk_ModExpCRT = NULL; + p_hwcrhk_RandomBytes = NULL; + return to_return; + } + +static int hwcrhk_ctrl(int cmd, long i, void *p, void (*f)()) + { + int to_return = 1; + + switch(cmd) + { + case ENGINE_CTRL_SET_LOGSTREAM: + { + BIO *bio = (BIO *)p; + + CRYPTO_w_lock(CRYPTO_LOCK_ENGINE); + if (logstream) + { + BIO_free(logstream); + logstream = NULL; + } + if (CRYPTO_add(&bio->references,1,CRYPTO_LOCK_BIO) > 1) + logstream = bio; + else + ENGINEerr(ENGINE_F_HWCRHK_CTRL,ENGINE_R_BIO_WAS_FREED); + } + CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE); + break; + case ENGINE_CTRL_SET_PASSWORD_CALLBACK: + CRYPTO_w_lock(CRYPTO_LOCK_ENGINE); + password_callback = (pem_password_cb *)f; + CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE); + break; + /* this enables or disables the "SimpleForkCheck" flag used in the + * initialisation structure. */ + case ENGINE_CTRL_CHIL_SET_FORKCHECK: + CRYPTO_w_lock(CRYPTO_LOCK_ENGINE); + if(i) + hwcrhk_globals.flags |= + HWCryptoHook_InitFlags_SimpleForkCheck; + else + hwcrhk_globals.flags &= + ~HWCryptoHook_InitFlags_SimpleForkCheck; + CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE); + break; + /* This will prevent the initialisation function from "installing" + * the mutex-handling callbacks, even if they are available from + * within the library (or were provided to the library from the + * calling application). This is to remove any baggage for + * applications not using multithreading. */ + case ENGINE_CTRL_CHIL_NO_LOCKING: + CRYPTO_w_lock(CRYPTO_LOCK_ENGINE); + disable_mutex_callbacks = 1; + CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE); + break; + + /* The command isn't understood by this engine */ + default: + ENGINEerr(ENGINE_F_HWCRHK_CTRL, + ENGINE_R_CTRL_COMMAND_NOT_IMPLEMENTED); + to_return = 0; + break; + } + + return to_return; + } + +static EVP_PKEY *hwcrhk_load_privkey(const char *key_id, + const char *passphrase) + { + RSA *rtmp = NULL; + EVP_PKEY *res = NULL; + HWCryptoHook_MPI e, n; + HWCryptoHook_RSAKeyHandle *hptr; + HWCryptoHook_ErrMsgBuf rmsg; + + if(!hwcrhk_context) + { + ENGINEerr(ENGINE_F_HWCRHK_LOAD_PRIVKEY, + ENGINE_R_NOT_INITIALISED); + goto err; + } + hptr = OPENSSL_malloc(sizeof(HWCryptoHook_RSAKeyHandle)); + if (!hptr) + { + ENGINEerr(ENGINE_F_HWCRHK_LOAD_PRIVKEY, + ERR_R_MALLOC_FAILURE); + goto err; + } + if (p_hwcrhk_RSALoadKey(hwcrhk_context, key_id, hptr, + &rmsg, NULL)) + { + ENGINEerr(ENGINE_F_HWCRHK_LOAD_PRIVKEY, + ENGINE_R_CHIL_ERROR); + ERR_add_error_data(1,rmsg.buf); + goto err; + } + if (!*hptr) + { + ENGINEerr(ENGINE_F_HWCRHK_LOAD_PRIVKEY, + ENGINE_R_NO_KEY); + goto err; + } + rtmp = RSA_new_method(&engine_hwcrhk); + RSA_set_ex_data(rtmp, hndidx, (char *)hptr); + rtmp->e = BN_new(); + rtmp->n = BN_new(); + rtmp->flags |= RSA_FLAG_EXT_PKEY; + MPI2BN(rtmp->e, e); + MPI2BN(rtmp->n, n); + if (p_hwcrhk_RSAGetPublicKey(*hptr, &n, &e, &rmsg) + != HWCRYPTOHOOK_ERROR_MPISIZE) + { + ENGINEerr(ENGINE_F_HWCRHK_LOAD_PUBKEY,ENGINE_R_CHIL_ERROR); + ERR_add_error_data(1,rmsg.buf); + goto err; + } + + bn_expand2(rtmp->e, e.size/sizeof(BN_ULONG)); + bn_expand2(rtmp->n, n.size/sizeof(BN_ULONG)); + MPI2BN(rtmp->e, e); + MPI2BN(rtmp->n, n); + + if (p_hwcrhk_RSAGetPublicKey(*hptr, &n, &e, &rmsg)) + { + ENGINEerr(ENGINE_F_HWCRHK_LOAD_PUBKEY, + ENGINE_R_CHIL_ERROR); + ERR_add_error_data(1,rmsg.buf); + goto err; + } + rtmp->e->top = e.size / sizeof(BN_ULONG); + bn_fix_top(rtmp->e); + rtmp->n->top = n.size / sizeof(BN_ULONG); + bn_fix_top(rtmp->n); + + res = EVP_PKEY_new(); + EVP_PKEY_assign_RSA(res, rtmp); + + return res; + err: + if (res) + EVP_PKEY_free(res); + if (rtmp) + RSA_free(rtmp); + return NULL; + } + +static EVP_PKEY *hwcrhk_load_pubkey(const char *key_id, const char *passphrase) + { + EVP_PKEY *res = hwcrhk_load_privkey(key_id, passphrase); + + if (res) + switch(res->type) + { + case EVP_PKEY_RSA: + { + RSA *rsa = NULL; + + CRYPTO_w_lock(CRYPTO_LOCK_EVP_PKEY); + rsa = res->pkey.rsa; + res->pkey.rsa = RSA_new(); + res->pkey.rsa->n = rsa->n; + res->pkey.rsa->e = rsa->e; + CRYPTO_w_unlock(CRYPTO_LOCK_EVP_PKEY); + RSA_free(rsa); + } + default: + ENGINEerr(ENGINE_F_HWCRHK_LOAD_PUBKEY, + ENGINE_R_CTRL_COMMAND_NOT_IMPLEMENTED); + goto err; + } + + return res; + err: + if (res) + EVP_PKEY_free(res); + return NULL; + } + +/* A little mod_exp */ +static int hwcrhk_mod_exp(BIGNUM *r, BIGNUM *a, const BIGNUM *p, + const BIGNUM *m, BN_CTX *ctx) + { + char tempbuf[1024]; + HWCryptoHook_ErrMsgBuf rmsg; + /* Since HWCryptoHook_MPI is pretty compatible with BIGNUM's, + we use them directly, plus a little macro magic. We only + thing we need to make sure of is that enough space is allocated. */ + HWCryptoHook_MPI m_a, m_p, m_n, m_r; + int to_return, ret; + + to_return = 0; /* expect failure */ + rmsg.buf = tempbuf; + rmsg.size = 1024; + + if(!hwcrhk_context) + { + ENGINEerr(ENGINE_F_HWCRHK_MOD_EXP,ENGINE_R_NOT_INITIALISED); + goto err; + } + /* Prepare the params */ + bn_expand2(r, m->top); /* Check for error !! */ + BN2MPI(m_a, a); + BN2MPI(m_p, p); + BN2MPI(m_n, m); + MPI2BN(r, m_r); + + /* Perform the operation */ + ret = p_hwcrhk_ModExp(hwcrhk_context, m_a, m_p, m_n, &m_r, &rmsg); + + /* Convert the response */ + r->top = m_r.size / sizeof(BN_ULONG); + bn_fix_top(r); + + if (ret < 0) + { + /* FIXME: When this error is returned, HWCryptoHook is + telling us that falling back to software computation + might be a good thing. */ + if(ret == HWCRYPTOHOOK_ERROR_FALLBACK) + { + ENGINEerr(ENGINE_F_HWCRHK_MOD_EXP,ENGINE_R_REQUEST_FALLBACK); + } + else + { + ENGINEerr(ENGINE_F_HWCRHK_MOD_EXP,ENGINE_R_REQUEST_FAILED); + } + ERR_add_error_data(1,rmsg.buf); + goto err; + } + + to_return = 1; +err: + return to_return; + } + +static int hwcrhk_rsa_mod_exp(BIGNUM *r, BIGNUM *I, RSA *rsa) + { + char tempbuf[1024]; + HWCryptoHook_ErrMsgBuf rmsg; + HWCryptoHook_RSAKeyHandle *hptr; + int to_return = 0, ret; + + if(!hwcrhk_context) + { + ENGINEerr(ENGINE_F_HWCRHK_MOD_EXP,ENGINE_R_NOT_INITIALISED); + goto err; + } + + /* This provides support for nForce keys. Since that's opaque data + all we do is provide a handle to the proper key and let HWCryptoHook + take care of the rest. */ + if ((hptr = (HWCryptoHook_RSAKeyHandle *) RSA_get_ex_data(rsa, hndidx)) + != NULL) + { + HWCryptoHook_MPI m_a, m_r; + + if(!rsa->n) + { + ENGINEerr(ENGINE_F_HWCRHK_RSA_MOD_EXP, + ENGINE_R_MISSING_KEY_COMPONENTS); + goto err; + } + + rmsg.buf = tempbuf; + rmsg.size = 1024; + + /* Prepare the params */ + bn_expand2(r, rsa->n->top); /* Check for error !! */ + BN2MPI(m_a, I); + MPI2BN(r, m_r); + + /* Perform the operation */ + ret = p_hwcrhk_RSA(m_a, *hptr, &m_r, &rmsg); + + /* Convert the response */ + r->top = m_r.size / sizeof(BN_ULONG); + bn_fix_top(r); + + if (ret < 0) + { + /* FIXME: When this error is returned, HWCryptoHook is + telling us that falling back to software computation + might be a good thing. */ + if(ret == HWCRYPTOHOOK_ERROR_FALLBACK) + { + ENGINEerr(ENGINE_F_HWCRHK_RSA_MOD_EXP,ENGINE_R_REQUEST_FALLBACK); + } + else + { + ENGINEerr(ENGINE_F_HWCRHK_RSA_MOD_EXP,ENGINE_R_REQUEST_FAILED); + } + ERR_add_error_data(1,rmsg.buf); + goto err; + } + } + else + { + HWCryptoHook_MPI m_a, m_p, m_q, m_dmp1, m_dmq1, m_iqmp, m_r; + + if(!rsa->p || !rsa->q || !rsa->dmp1 || !rsa->dmq1 || !rsa->iqmp) + { + ENGINEerr(ENGINE_F_HWCRHK_RSA_MOD_EXP, + ENGINE_R_MISSING_KEY_COMPONENTS); + goto err; + } + + rmsg.buf = tempbuf; + rmsg.size = 1024; + + /* Prepare the params */ + bn_expand2(r, rsa->n->top); /* Check for error !! */ + BN2MPI(m_a, I); + BN2MPI(m_p, rsa->p); + BN2MPI(m_q, rsa->q); + BN2MPI(m_dmp1, rsa->dmp1); + BN2MPI(m_dmq1, rsa->dmq1); + BN2MPI(m_iqmp, rsa->iqmp); + MPI2BN(r, m_r); + + /* Perform the operation */ + ret = p_hwcrhk_ModExpCRT(hwcrhk_context, m_a, m_p, m_q, + m_dmp1, m_dmq1, m_iqmp, &m_r, NULL); + + /* Convert the response */ + r->top = m_r.size / sizeof(BN_ULONG); + bn_fix_top(r); + + if (ret < 0) + { + /* FIXME: When this error is returned, HWCryptoHook is + telling us that falling back to software computation + might be a good thing. */ + if(ret == HWCRYPTOHOOK_ERROR_FALLBACK) + { + ENGINEerr(ENGINE_F_HWCRHK_RSA_MOD_EXP,ENGINE_R_REQUEST_FALLBACK); + } + else + { + ENGINEerr(ENGINE_F_HWCRHK_RSA_MOD_EXP,ENGINE_R_REQUEST_FAILED); + } + ERR_add_error_data(1,rmsg.buf); + goto err; + } + } + /* If we're here, we must be here with some semblance of success :-) */ + to_return = 1; +err: + return to_return; + } + +/* This function is aliased to mod_exp (with the mont stuff dropped). */ +static int hwcrhk_mod_exp_mont(BIGNUM *r, BIGNUM *a, const BIGNUM *p, + const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx) + { + return hwcrhk_mod_exp(r, a, p, m, ctx); + } + +/* This function is aliased to mod_exp (with the dh and mont dropped). */ +static int hwcrhk_mod_exp_dh(DH *dh, BIGNUM *r, BIGNUM *a, const BIGNUM *p, + const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx) + { + return hwcrhk_mod_exp(r, a, p, m, ctx); + } + +/* Random bytes are good */ +static int hwcrhk_rand_bytes(unsigned char *buf, int num) + { + char tempbuf[1024]; + HWCryptoHook_ErrMsgBuf rmsg; + int to_return = 0; /* assume failure */ + int ret; + + rmsg.buf = tempbuf; + rmsg.size = 1024; + + if(!hwcrhk_context) + { + ENGINEerr(ENGINE_F_HWCRHK_RAND_BYTES,ENGINE_R_NOT_INITIALISED); + goto err; + } + + ret = p_hwcrhk_RandomBytes(hwcrhk_context, buf, num, &rmsg); + if (ret < 0) + { + /* FIXME: When this error is returned, HWCryptoHook is + telling us that falling back to software computation + might be a good thing. */ + if(ret == HWCRYPTOHOOK_ERROR_FALLBACK) + { + ENGINEerr(ENGINE_F_HWCRHK_RAND_BYTES,ENGINE_R_REQUEST_FALLBACK); + } + else + { + ENGINEerr(ENGINE_F_HWCRHK_RAND_BYTES,ENGINE_R_REQUEST_FAILED); + } + ERR_add_error_data(1,rmsg.buf); + goto err; + } + to_return = 1; + err: + return to_return; + } + +static int hwcrhk_rand_status(void) + { + return 1; + } + +/* This cleans up an RSA KM key, called when ex_data is freed */ + +static void hwcrhk_ex_free(void *obj, void *item, CRYPTO_EX_DATA *ad, + int ind,long argl, void *argp) +{ + char tempbuf[1024]; + HWCryptoHook_ErrMsgBuf rmsg; + HWCryptoHook_RSAKeyHandle *hptr; + int ret; + + rmsg.buf = tempbuf; + rmsg.size = 1024; + + hptr = (HWCryptoHook_RSAKeyHandle *) item; + if(!hptr) return; + ret = p_hwcrhk_RSAUnloadKey(*hptr, NULL); + OPENSSL_free(hptr); +} + +/* Mutex calls: since the HWCryptoHook model closely follows the POSIX model + * these just wrap the POSIX functions and add some logging. + */ + +static int hwcrhk_mutex_init(HWCryptoHook_Mutex* mt, + HWCryptoHook_CallerContext *cactx) + { + mt->lockid = CRYPTO_get_new_dynlockid(); + if (mt->lockid == 0) + return 0; + return 1; + } + +static int hwcrhk_mutex_lock(HWCryptoHook_Mutex *mt) + { + CRYPTO_w_lock(mt->lockid); + return 1; + } + +void hwcrhk_mutex_unlock(HWCryptoHook_Mutex * mt) + { + CRYPTO_w_unlock(mt->lockid); + } + +static void hwcrhk_mutex_destroy(HWCryptoHook_Mutex *mt) + { + CRYPTO_destroy_dynlockid(mt->lockid); + } + +static int hwcrhk_get_pass(const char *prompt_info, + int *len_io, char *buf, + HWCryptoHook_PassphraseContext *ppctx, + HWCryptoHook_CallerContext *cactx) + { + int l = 0; + char prompt[1024]; + + if (password_callback == NULL) + { + ENGINEerr(ENGINE_F_HWCRHK_GET_PASS,ENGINE_R_NO_CALLBACK); + return -1; + } + if (prompt_info) + { + strncpy(prompt, "Card: \"", sizeof(prompt)); + l += 5; + strncpy(prompt + l, prompt_info, sizeof(prompt) - l); + l += strlen(prompt_info); + if (l + 2 < sizeof(prompt)) + { + strncpy(prompt + l, "\"\n", sizeof(prompt) - l); + l += 2; + } + } + if (l < sizeof(prompt) - 1) + { + strncpy(prompt, "Enter Passphrase <enter to cancel>:", + sizeof(prompt) - l); + l += 35; + } + prompt[l] = '\0'; + + /* I know, passing on the prompt instead of the user data *is* + a bad thing. However, that's all we have right now. + -- Richard Levitte */ + *len_io = password_callback(buf, *len_io, 0, prompt); + if(!*len_io) + return -1; + return 0; + } + +static void hwcrhk_log_message(void *logstr, const char *message) + { + BIO *lstream = NULL; + + CRYPTO_w_lock(CRYPTO_LOCK_BIO); + if (logstr) + lstream=*(BIO **)logstr; + if (lstream) + { + BIO_write(lstream, message, strlen(message)); + } + CRYPTO_w_unlock(CRYPTO_LOCK_BIO); + } + +#endif /* !NO_HW_NCIPHER */ +#endif /* !NO_HW */ |