diff options
Diffstat (limited to 'crypto/engine/hw_cswift.c')
| -rw-r--r-- | crypto/engine/hw_cswift.c | 806 |
1 files changed, 806 insertions, 0 deletions
diff --git a/crypto/engine/hw_cswift.c b/crypto/engine/hw_cswift.c new file mode 100644 index 0000000000..5747973c74 --- /dev/null +++ b/crypto/engine/hw_cswift.c @@ -0,0 +1,806 @@ +/* crypto/engine/hw_cswift.c */ +/* Written by Geoff Thorpe (geoff@geoffthorpe.net) 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 "cryptlib.h" +#include <openssl/dso.h> +#include "engine_int.h" +#include <openssl/engine.h> + +#ifndef NO_HW +#ifndef NO_HW_CSWIFT + +/* Attribution notice: Rainbow have generously allowed me to reproduce + * the necessary definitions here from their API. This means the support + * can build independently of whether application builders have the + * API or hardware. This will allow developers to easily produce software + * that has latent hardware support for any users that have accelerators + * installed, without the developers themselves needing anything extra. + * + * I have only clipped the parts from the CryptoSwift header files that + * are (or seem) relevant to the CryptoSwift support code. This is + * simply to keep the file sizes reasonable. + * [Geoff] + */ +#ifdef FLAT_INC +#include "cswift.h" +#else +#include "vendor_defns/cswift.h" +#endif + +static int cswift_init(void); +static int cswift_finish(void); + +/* BIGNUM stuff */ +static int cswift_mod_exp(BIGNUM *r, BIGNUM *a, const BIGNUM *p, + const BIGNUM *m, BN_CTX *ctx); +static int cswift_mod_exp_crt(BIGNUM *r, BIGNUM *a, const BIGNUM *p, + const BIGNUM *q, const BIGNUM *dmp1, const BIGNUM *dmq1, + const BIGNUM *iqmp, BN_CTX *ctx); + +/* RSA stuff */ +static int cswift_rsa_mod_exp(BIGNUM *r0, BIGNUM *I, RSA *rsa); +/* This function is aliased to mod_exp (with the mont stuff dropped). */ +static int cswift_mod_exp_mont(BIGNUM *r, BIGNUM *a, const BIGNUM *p, + const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx); + +/* DSA stuff */ +static DSA_SIG *cswift_dsa_sign(const unsigned char *dgst, int dlen, DSA *dsa); +static int cswift_dsa_verify(const unsigned char *dgst, int dgst_len, + DSA_SIG *sig, DSA *dsa); + +/* DH stuff */ +/* This function is alised to mod_exp (with the DH and mont dropped). */ +static int cswift_mod_exp_dh(DH *dh, BIGNUM *r, BIGNUM *a, const BIGNUM *p, + const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx); + + +/* Our internal RSA_METHOD that we provide pointers to */ +static RSA_METHOD cswift_rsa = + { + "CryptoSwift RSA method", + NULL, + NULL, + NULL, + NULL, + cswift_rsa_mod_exp, + cswift_mod_exp_mont, + NULL, + NULL, + 0, + NULL, + NULL, + NULL + }; + +/* Our internal DSA_METHOD that we provide pointers to */ +static DSA_METHOD cswift_dsa = + { + "CryptoSwift DSA method", + cswift_dsa_sign, + NULL, /* dsa_sign_setup */ + cswift_dsa_verify, + NULL, /* dsa_mod_exp */ + NULL, /* bn_mod_exp */ + NULL, /* init */ + NULL, /* finish */ + 0, /* flags */ + NULL /* app_data */ + }; + +/* Our internal DH_METHOD that we provide pointers to */ +static DH_METHOD cswift_dh = + { + "CryptoSwift DH method", + NULL, + NULL, + cswift_mod_exp_dh, + NULL, + NULL, + 0, + NULL + }; + +/* Our ENGINE structure. */ +static ENGINE engine_cswift = + { + "cswift", + "CryptoSwift hardware engine support", + &cswift_rsa, + &cswift_dsa, + &cswift_dh, + NULL, + cswift_mod_exp, + cswift_mod_exp_crt, + cswift_init, + cswift_finish, + NULL, /* no ctrl() */ + NULL, /* no load_privkey() */ + NULL, /* no load_pubkey() */ + 0, /* no flags */ + 0, 0, /* no references */ + NULL, NULL /* unlinked */ + }; + +/* 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_cswift() + { + 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(); + cswift_rsa.rsa_pub_enc = meth1->rsa_pub_enc; + cswift_rsa.rsa_pub_dec = meth1->rsa_pub_dec; + cswift_rsa.rsa_priv_enc = meth1->rsa_priv_enc; + cswift_rsa.rsa_priv_dec = meth1->rsa_priv_dec; + + /* Much the same for Diffie-Hellman */ + meth2 = DH_OpenSSL(); + cswift_dh.generate_key = meth2->generate_key; + cswift_dh.compute_key = meth2->compute_key; + return &engine_cswift; + } + +/* This is a process-global DSO handle used for loading and unloading + * the CryptoSwift 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 *cswift_dso = NULL; + +/* These are the function pointers that are (un)set when the library has + * successfully (un)loaded. */ +t_swAcquireAccContext *p_CSwift_AcquireAccContext = NULL; +t_swAttachKeyParam *p_CSwift_AttachKeyParam = NULL; +t_swSimpleRequest *p_CSwift_SimpleRequest = NULL; +t_swReleaseAccContext *p_CSwift_ReleaseAccContext = NULL; + +/* Used in the DSO operations. */ +static const char *CSWIFT_LIBNAME = "swift"; +static const char *CSWIFT_F1 = "swAcquireAccContext"; +static const char *CSWIFT_F2 = "swAttachKeyParam"; +static const char *CSWIFT_F3 = "swSimpleRequest"; +static const char *CSWIFT_F4 = "swReleaseAccContext"; + + +/* CryptoSwift 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(SW_CONTEXT_HANDLE *hac) + { + SW_STATUS status; + + status = p_CSwift_AcquireAccContext(hac); + if(status != SW_OK) + return 0; + return 1; + } + +/* similarly to release one. */ +static void release_context(SW_CONTEXT_HANDLE hac) + { + p_CSwift_ReleaseAccContext(hac); + } + +/* (de)initialisation functions. */ +static int cswift_init() + { + SW_CONTEXT_HANDLE hac; + t_swAcquireAccContext *p1; + t_swAttachKeyParam *p2; + t_swSimpleRequest *p3; + t_swReleaseAccContext *p4; + + if(cswift_dso != NULL) + { + ENGINEerr(ENGINE_F_CSWIFT_INIT,ENGINE_R_ALREADY_LOADED); + goto err; + } + /* Attempt to load libswift.so/swift.dll/whatever. */ + cswift_dso = DSO_load(NULL, CSWIFT_LIBNAME, NULL, 0); + if(cswift_dso == NULL) + { + ENGINEerr(ENGINE_F_CSWIFT_INIT,ENGINE_R_DSO_FAILURE); + goto err; + } + if(!(p1 = (t_swAcquireAccContext *) + DSO_bind_func(cswift_dso, CSWIFT_F1)) || + !(p2 = (t_swAttachKeyParam *) + DSO_bind_func(cswift_dso, CSWIFT_F2)) || + !(p3 = (t_swSimpleRequest *) + DSO_bind_func(cswift_dso, CSWIFT_F3)) || + !(p4 = (t_swReleaseAccContext *) + DSO_bind_func(cswift_dso, CSWIFT_F4))) + { + ENGINEerr(ENGINE_F_CSWIFT_INIT,ENGINE_R_DSO_FAILURE); + goto err; + } + /* Copy the pointers */ + p_CSwift_AcquireAccContext = p1; + p_CSwift_AttachKeyParam = p2; + p_CSwift_SimpleRequest = p3; + p_CSwift_ReleaseAccContext = p4; + /* Try and get a context - if not, we may have a DSO but no + * accelerator! */ + if(!get_context(&hac)) + { + ENGINEerr(ENGINE_F_CSWIFT_INIT,ENGINE_R_UNIT_FAILURE); + goto err; + } + release_context(hac); + /* Everything's fine. */ + return 1; +err: + if(cswift_dso) + DSO_free(cswift_dso); + p_CSwift_AcquireAccContext = NULL; + p_CSwift_AttachKeyParam = NULL; + p_CSwift_SimpleRequest = NULL; + p_CSwift_ReleaseAccContext = NULL; + return 0; + } + +static int cswift_finish() + { + if(cswift_dso == NULL) + { + ENGINEerr(ENGINE_F_CSWIFT_FINISH,ENGINE_R_NOT_LOADED); + return 0; + } + if(!DSO_free(cswift_dso)) + { + ENGINEerr(ENGINE_F_CSWIFT_FINISH,ENGINE_R_DSO_FAILURE); + return 0; + } + cswift_dso = NULL; + p_CSwift_AcquireAccContext = NULL; + p_CSwift_AttachKeyParam = NULL; + p_CSwift_SimpleRequest = NULL; + p_CSwift_ReleaseAccContext = NULL; + return 1; + } + +/* Un petit mod_exp */ +static int cswift_mod_exp(BIGNUM *r, BIGNUM *a, const BIGNUM *p, + const BIGNUM *m, BN_CTX *ctx) + { + /* I need somewhere to store temporary serialised values for + * use with the CryptoSwift API calls. A neat cheat - I'll use + * BIGNUMs from the BN_CTX but access their arrays directly as + * byte arrays <grin>. This way I don't have to clean anything + * up. */ + BIGNUM *modulus; + BIGNUM *exponent; + BIGNUM *argument; + BIGNUM *result; + SW_STATUS sw_status; + SW_LARGENUMBER arg, res; + SW_PARAM sw_param; + SW_CONTEXT_HANDLE hac; + int to_return, acquired; + + modulus = exponent = argument = result = NULL; + to_return = 0; /* expect failure */ + acquired = 0; + + if(!get_context(&hac)) + { + ENGINEerr(ENGINE_F_CSWIFT_MOD_EXP,ENGINE_R_GET_HANDLE_FAILED); + goto err; + } + acquired = 1; + /* Prepare the params */ + modulus = BN_CTX_get(ctx); + exponent = BN_CTX_get(ctx); + argument = BN_CTX_get(ctx); + result = BN_CTX_get(ctx); + if(!modulus || !exponent || !argument || !result) + { + ENGINEerr(ENGINE_F_CSWIFT_MOD_EXP,ENGINE_R_BN_CTX_FULL); + goto err; + } + if(!bn_wexpand(modulus, m->top) || !bn_wexpand(exponent, p->top) || + !bn_wexpand(argument, a->top) || !bn_wexpand(result, m->top)) + { + ENGINEerr(ENGINE_F_CSWIFT_MOD_EXP,ENGINE_R_BN_EXPAND_FAIL); + goto err; + } + sw_param.type = SW_ALG_EXP; + sw_param.up.exp.modulus.nbytes = BN_bn2bin(m, + (unsigned char *)modulus->d); + sw_param.up.exp.modulus.value = (unsigned char *)modulus->d; + sw_param.up.exp.exponent.nbytes = BN_bn2bin(p, + (unsigned char *)exponent->d); + sw_param.up.exp.exponent.value = (unsigned char *)exponent->d; + /* Attach the key params */ + sw_status = p_CSwift_AttachKeyParam(hac, &sw_param); + switch(sw_status) + { + case SW_OK: + break; + case SW_ERR_INPUT_SIZE: + ENGINEerr(ENGINE_F_CSWIFT_MOD_EXP, + ENGINE_R_SIZE_TOO_LARGE_OR_TOO_SMALL); + goto err; + default: + { + char tmpbuf[20]; + ENGINEerr(ENGINE_F_CSWIFT_MOD_EXP,ENGINE_R_REQUEST_FAILED); + sprintf(tmpbuf, "%ld", sw_status); + ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf); + } + goto err; + } + /* Prepare the argument and response */ + arg.nbytes = BN_bn2bin(a, (unsigned char *)argument->d); + arg.value = (unsigned char *)argument->d; + res.nbytes = BN_num_bytes(m); + memset(result->d, 0, res.nbytes); + res.value = (unsigned char *)result->d; + /* Perform the operation */ + if((sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_MODEXP, &arg, 1, + &res, 1)) != SW_OK) + { + char tmpbuf[20]; + ENGINEerr(ENGINE_F_CSWIFT_MOD_EXP,ENGINE_R_REQUEST_FAILED); + sprintf(tmpbuf, "%ld", sw_status); + ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf); + goto err; + } + /* Convert the response */ + BN_bin2bn((unsigned char *)result->d, res.nbytes, r); + to_return = 1; +err: + if(acquired) + release_context(hac); + if(modulus) ctx->tos--; + if(exponent) ctx->tos--; + if(argument) ctx->tos--; + if(result) ctx->tos--; + return to_return; + } + +/* Un petit mod_exp chinois */ +static int cswift_mod_exp_crt(BIGNUM *r, BIGNUM *a, const BIGNUM *p, + const BIGNUM *q, const BIGNUM *dmp1, + const BIGNUM *dmq1, const BIGNUM *iqmp, BN_CTX *ctx) + { + SW_STATUS sw_status; + SW_LARGENUMBER arg, res; + SW_PARAM sw_param; + SW_CONTEXT_HANDLE hac; + BIGNUM *rsa_p = NULL; + BIGNUM *rsa_q = NULL; + BIGNUM *rsa_dmp1 = NULL; + BIGNUM *rsa_dmq1 = NULL; + BIGNUM *rsa_iqmp = NULL; + BIGNUM *argument = NULL; + BIGNUM *result = NULL; + int to_return = 0; /* expect failure */ + int acquired = 0; + + if(!get_context(&hac)) + { + ENGINEerr(ENGINE_F_CSWIFT_MOD_EXP_CRT,ENGINE_R_GET_HANDLE_FAILED); + goto err; + } + acquired = 1; + /* Prepare the params */ + rsa_p = BN_CTX_get(ctx); + rsa_q = BN_CTX_get(ctx); + rsa_dmp1 = BN_CTX_get(ctx); + rsa_dmq1 = BN_CTX_get(ctx); + rsa_iqmp = BN_CTX_get(ctx); + argument = BN_CTX_get(ctx); + result = BN_CTX_get(ctx); + if(!rsa_p || !rsa_q || !rsa_dmp1 || !rsa_dmq1 || !rsa_iqmp || + !argument || !result) + { + ENGINEerr(ENGINE_F_CSWIFT_MOD_EXP_CRT,ENGINE_R_BN_CTX_FULL); + goto err; + } + if(!bn_wexpand(rsa_p, p->top) || !bn_wexpand(rsa_q, q->top) || + !bn_wexpand(rsa_dmp1, dmp1->top) || + !bn_wexpand(rsa_dmq1, dmq1->top) || + !bn_wexpand(rsa_iqmp, iqmp->top) || + !bn_wexpand(argument, a->top) || + !bn_wexpand(result, p->top + q->top)) + { + ENGINEerr(ENGINE_F_CSWIFT_MOD_EXP_CRT,ENGINE_R_BN_EXPAND_FAIL); + goto err; + } + sw_param.type = SW_ALG_CRT; + sw_param.up.crt.p.nbytes = BN_bn2bin(p, (unsigned char *)rsa_p->d); + sw_param.up.crt.p.value = (unsigned char *)rsa_p->d; + sw_param.up.crt.q.nbytes = BN_bn2bin(q, (unsigned char *)rsa_q->d); + sw_param.up.crt.q.value = (unsigned char *)rsa_q->d; + sw_param.up.crt.dmp1.nbytes = BN_bn2bin(dmp1, + (unsigned char *)rsa_dmp1->d); + sw_param.up.crt.dmp1.value = (unsigned char *)rsa_dmp1->d; + sw_param.up.crt.dmq1.nbytes = BN_bn2bin(dmq1, + (unsigned char *)rsa_dmq1->d); + sw_param.up.crt.dmq1.value = (unsigned char *)rsa_dmq1->d; + sw_param.up.crt.iqmp.nbytes = BN_bn2bin(iqmp, + (unsigned char *)rsa_iqmp->d); + sw_param.up.crt.iqmp.value = (unsigned char *)rsa_iqmp->d; + /* Attach the key params */ + sw_status = p_CSwift_AttachKeyParam(hac, &sw_param); + switch(sw_status) + { + case SW_OK: + break; + case SW_ERR_INPUT_SIZE: + ENGINEerr(ENGINE_F_CSWIFT_MOD_EXP_CRT, + ENGINE_R_SIZE_TOO_LARGE_OR_TOO_SMALL); + goto err; + default: + { + char tmpbuf[20]; + ENGINEerr(ENGINE_F_CSWIFT_MOD_EXP_CRT,ENGINE_R_REQUEST_FAILED); + sprintf(tmpbuf, "%ld", sw_status); + ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf); + } + goto err; + } + /* Prepare the argument and response */ + arg.nbytes = BN_bn2bin(a, (unsigned char *)argument->d); + arg.value = (unsigned char *)argument->d; + res.nbytes = 2 * BN_num_bytes(p); + memset(result->d, 0, res.nbytes); + res.value = (unsigned char *)result->d; + /* Perform the operation */ + if((sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_MODEXP_CRT, &arg, 1, + &res, 1)) != SW_OK) + { + char tmpbuf[20]; + ENGINEerr(ENGINE_F_CSWIFT_MOD_EXP_CRT,ENGINE_R_REQUEST_FAILED); + sprintf(tmpbuf, "%ld", sw_status); + ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf); + goto err; + } + /* Convert the response */ + BN_bin2bn((unsigned char *)result->d, res.nbytes, r); + to_return = 1; +err: + if(acquired) + release_context(hac); + if(rsa_p) ctx->tos--; + if(rsa_q) ctx->tos--; + if(rsa_dmp1) ctx->tos--; + if(rsa_dmq1) ctx->tos--; + if(rsa_iqmp) ctx->tos--; + if(argument) ctx->tos--; + if(result) ctx->tos--; + return to_return; + } + +static int cswift_rsa_mod_exp(BIGNUM *r0, BIGNUM *I, RSA *rsa) + { + BN_CTX *ctx; + int to_return = 0; + + if((ctx = BN_CTX_new()) == NULL) + goto err; + if(!rsa->p || !rsa->q || !rsa->dmp1 || !rsa->dmq1 || !rsa->iqmp) + { + ENGINEerr(ENGINE_F_CSWIFT_RSA_MOD_EXP,ENGINE_R_MISSING_KEY_COMPONENTS); + goto err; + } + to_return = cswift_mod_exp_crt(r0, I, rsa->p, rsa->q, rsa->dmp1, + rsa->dmq1, rsa->iqmp, ctx); +err: + if(ctx) + BN_CTX_free(ctx); + return to_return; + } + +/* This function is aliased to mod_exp (with the mont stuff dropped). */ +static int cswift_mod_exp_mont(BIGNUM *r, BIGNUM *a, const BIGNUM *p, + const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx) + { + return cswift_mod_exp(r, a, p, m, ctx); + } + +static DSA_SIG *cswift_dsa_sign(const unsigned char *dgst, int dlen, DSA *dsa) + { + SW_CONTEXT_HANDLE hac; + SW_PARAM sw_param; + SW_STATUS sw_status; + SW_LARGENUMBER arg, res; + unsigned char *ptr; + BN_CTX *ctx; + BIGNUM *dsa_p = NULL; + BIGNUM *dsa_q = NULL; + BIGNUM *dsa_g = NULL; + BIGNUM *dsa_key = NULL; + BIGNUM *result = NULL; + DSA_SIG *to_return = NULL; + int acquired = 0; + + if((ctx = BN_CTX_new()) == NULL) + goto err; + if(!get_context(&hac)) + { + ENGINEerr(ENGINE_F_CSWIFT_DSA_SIGN,ENGINE_R_GET_HANDLE_FAILED); + goto err; + } + acquired = 1; + /* Prepare the params */ + dsa_p = BN_CTX_get(ctx); + dsa_q = BN_CTX_get(ctx); + dsa_g = BN_CTX_get(ctx); + dsa_key = BN_CTX_get(ctx); + result = BN_CTX_get(ctx); + if(!dsa_p || !dsa_q || !dsa_g || !dsa_key || !result) + { + ENGINEerr(ENGINE_F_CSWIFT_DSA_SIGN,ENGINE_R_BN_CTX_FULL); + goto err; + } + if(!bn_wexpand(dsa_p, dsa->p->top) || + !bn_wexpand(dsa_q, dsa->q->top) || + !bn_wexpand(dsa_g, dsa->g->top) || + !bn_wexpand(dsa_key, dsa->priv_key->top) || + !bn_wexpand(result, dsa->p->top)) + { + ENGINEerr(ENGINE_F_CSWIFT_DSA_SIGN,ENGINE_R_BN_EXPAND_FAIL); + goto err; + } + sw_param.type = SW_ALG_DSA; + sw_param.up.dsa.p.nbytes = BN_bn2bin(dsa->p, + (unsigned char *)dsa_p->d); + sw_param.up.dsa.p.value = (unsigned char *)dsa_p->d; + sw_param.up.dsa.q.nbytes = BN_bn2bin(dsa->q, + (unsigned char *)dsa_q->d); + sw_param.up.dsa.q.value = (unsigned char *)dsa_q->d; + sw_param.up.dsa.g.nbytes = BN_bn2bin(dsa->g, + (unsigned char *)dsa_g->d); + sw_param.up.dsa.g.value = (unsigned char *)dsa_g->d; + sw_param.up.dsa.key.nbytes = BN_bn2bin(dsa->priv_key, + (unsigned char *)dsa_key->d); + sw_param.up.dsa.key.value = (unsigned char *)dsa_key->d; + /* Attach the key params */ + sw_status = p_CSwift_AttachKeyParam(hac, &sw_param); + switch(sw_status) + { + case SW_OK: + break; + case SW_ERR_INPUT_SIZE: + ENGINEerr(ENGINE_F_CSWIFT_DSA_SIGN, + ENGINE_R_SIZE_TOO_LARGE_OR_TOO_SMALL); + goto err; + default: + { + char tmpbuf[20]; + ENGINEerr(ENGINE_F_CSWIFT_DSA_SIGN,ENGINE_R_REQUEST_FAILED); + sprintf(tmpbuf, "%ld", sw_status); + ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf); + } + goto err; + } + /* Prepare the argument and response */ + arg.nbytes = dlen; + arg.value = (unsigned char *)dgst; + res.nbytes = BN_num_bytes(dsa->p); + memset(result->d, 0, res.nbytes); + res.value = (unsigned char *)result->d; + /* Perform the operation */ + sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_DSS_SIGN, &arg, 1, + &res, 1); + if(sw_status != SW_OK) + { + char tmpbuf[20]; + ENGINEerr(ENGINE_F_CSWIFT_DSA_SIGN,ENGINE_R_REQUEST_FAILED); + sprintf(tmpbuf, "%ld", sw_status); + ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf); + goto err; + } + /* Convert the response */ + ptr = (unsigned char *)result->d; + if((to_return = DSA_SIG_new()) == NULL) + goto err; + to_return->r = BN_bin2bn((unsigned char *)result->d, 20, NULL); + to_return->s = BN_bin2bn((unsigned char *)result->d + 20, 20, NULL); + +err: + if(acquired) + release_context(hac); + if(dsa_p) ctx->tos--; + if(dsa_q) ctx->tos--; + if(dsa_g) ctx->tos--; + if(dsa_key) ctx->tos--; + if(result) ctx->tos--; + if(ctx) + BN_CTX_free(ctx); + return to_return; + } + +static int cswift_dsa_verify(const unsigned char *dgst, int dgst_len, + DSA_SIG *sig, DSA *dsa) + { + SW_CONTEXT_HANDLE hac; + SW_PARAM sw_param; + SW_STATUS sw_status; + SW_LARGENUMBER arg[2], res; + unsigned long sig_result; + BN_CTX *ctx; + BIGNUM *dsa_p = NULL; + BIGNUM *dsa_q = NULL; + BIGNUM *dsa_g = NULL; + BIGNUM *dsa_key = NULL; + BIGNUM *argument = NULL; + int to_return = -1; + int acquired = 0; + + if((ctx = BN_CTX_new()) == NULL) + goto err; + if(!get_context(&hac)) + { + ENGINEerr(ENGINE_F_CSWIFT_DSA_VERIFY,ENGINE_R_GET_HANDLE_FAILED); + goto err; + } + acquired = 1; + /* Prepare the params */ + dsa_p = BN_CTX_get(ctx); + dsa_q = BN_CTX_get(ctx); + dsa_g = BN_CTX_get(ctx); + dsa_key = BN_CTX_get(ctx); + argument = BN_CTX_get(ctx); + if(!dsa_p || !dsa_q || !dsa_g || !dsa_key || !argument) + { + ENGINEerr(ENGINE_F_CSWIFT_DSA_VERIFY,ENGINE_R_BN_CTX_FULL); + goto err; + } + if(!bn_wexpand(dsa_p, dsa->p->top) || + !bn_wexpand(dsa_q, dsa->q->top) || + !bn_wexpand(dsa_g, dsa->g->top) || + !bn_wexpand(dsa_key, dsa->pub_key->top) || + !bn_wexpand(argument, 40)) + { + ENGINEerr(ENGINE_F_CSWIFT_DSA_VERIFY,ENGINE_R_BN_EXPAND_FAIL); + goto err; + } + sw_param.type = SW_ALG_DSA; + sw_param.up.dsa.p.nbytes = BN_bn2bin(dsa->p, + (unsigned char *)dsa_p->d); + sw_param.up.dsa.p.value = (unsigned char *)dsa_p->d; + sw_param.up.dsa.q.nbytes = BN_bn2bin(dsa->q, + (unsigned char *)dsa_q->d); + sw_param.up.dsa.q.value = (unsigned char *)dsa_q->d; + sw_param.up.dsa.g.nbytes = BN_bn2bin(dsa->g, + (unsigned char *)dsa_g->d); + sw_param.up.dsa.g.value = (unsigned char *)dsa_g->d; + sw_param.up.dsa.key.nbytes = BN_bn2bin(dsa->pub_key, + (unsigned char *)dsa_key->d); + sw_param.up.dsa.key.value = (unsigned char *)dsa_key->d; + /* Attach the key params */ + sw_status = p_CSwift_AttachKeyParam(hac, &sw_param); + switch(sw_status) + { + case SW_OK: + break; + case SW_ERR_INPUT_SIZE: + ENGINEerr(ENGINE_F_CSWIFT_DSA_VERIFY, + ENGINE_R_SIZE_TOO_LARGE_OR_TOO_SMALL); + goto err; + default: + { + char tmpbuf[20]; + ENGINEerr(ENGINE_F_CSWIFT_DSA_VERIFY,ENGINE_R_REQUEST_FAILED); + sprintf(tmpbuf, "%ld", sw_status); + ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf); + } + goto err; + } + /* Prepare the argument and response */ + arg[0].nbytes = dgst_len; + arg[0].value = (unsigned char *)dgst; + arg[1].nbytes = 40; + arg[1].value = (unsigned char *)argument->d; + memset(arg[1].value, 0, 40); + BN_bn2bin(sig->r, arg[1].value + 20 - BN_num_bytes(sig->r)); + BN_bn2bin(sig->s, arg[1].value + 40 - BN_num_bytes(sig->s)); + res.nbytes = 4; /* unsigned long */ + res.value = (unsigned char *)(&sig_result); + /* Perform the operation */ + sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_DSS_VERIFY, arg, 2, + &res, 1); + if(sw_status != SW_OK) + { + char tmpbuf[20]; + ENGINEerr(ENGINE_F_CSWIFT_DSA_VERIFY,ENGINE_R_REQUEST_FAILED); + sprintf(tmpbuf, "%ld", sw_status); + ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf); + goto err; + } + /* Convert the response */ + to_return = ((sig_result == 0) ? 0 : 1); + +err: + if(acquired) + release_context(hac); + if(dsa_p) ctx->tos--; + if(dsa_q) ctx->tos--; + if(dsa_g) ctx->tos--; + if(dsa_key) ctx->tos--; + if(argument) ctx->tos--; + if(ctx) + BN_CTX_free(ctx); + return to_return; + } + +/* This function is aliased to mod_exp (with the dh and mont dropped). */ +static int cswift_mod_exp_dh(DH *dh, BIGNUM *r, BIGNUM *a, const BIGNUM *p, + const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx) + { + return cswift_mod_exp(r, a, p, m, ctx); + } + +#endif /* !NO_HW_CSWIFT */ +#endif /* !NO_HW */ |