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openssl/engines/e_capi.c
Dr. Stephen Henson bda5153703 PR: 2880 
Submitted by: "Florian Rüchel" <florian.ruechel@ruhr-uni-bochum.de>

Correctly handle local machine keys in the capi ENGINE.
2012-11-18 15:21:12 +00:00

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/* engines/e_capi.c */
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
* project.
*/
/* ====================================================================
* Copyright (c) 2008 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.
* ====================================================================
*/
#include <stdio.h>
#include <string.h>
#include <openssl/crypto.h>
#include <openssl/buffer.h>
#include <openssl/bn.h>
#ifdef OPENSSL_SYS_WIN32
#ifndef OPENSSL_NO_CAPIENG
#include <openssl/rsa.h>
#include <windows.h>
#ifndef _WIN32_WINNT
#define _WIN32_WINNT 0x0400
#endif
#include <wincrypt.h>
/*
* This module uses several "new" interfaces, among which is
* CertGetCertificateContextProperty. CERT_KEY_PROV_INFO_PROP_ID is
* one of possible values you can pass to function in question. By
* checking if it's defined we can see if wincrypt.h and accompanying
* crypt32.lib are in shape. The native MingW32 headers up to and
* including __W32API_VERSION 3.14 lack of struct DSSPUBKEY and the
* defines CERT_STORE_PROV_SYSTEM_A and CERT_STORE_READONLY_FLAG,
* so we check for these too and avoid compiling.
* Yes, it's rather "weak" test and if compilation fails,
* then re-configure with -DOPENSSL_NO_CAPIENG.
*/
#if defined(CERT_KEY_PROV_INFO_PROP_ID) && \
defined(CERT_STORE_PROV_SYSTEM_A) && \
defined(CERT_STORE_READONLY_FLAG)
# define __COMPILE_CAPIENG
#endif /* CERT_KEY_PROV_INFO_PROP_ID */
#endif /* OPENSSL_NO_CAPIENG */
#endif /* OPENSSL_SYS_WIN32 */
#ifdef __COMPILE_CAPIENG
#undef X509_EXTENSIONS
#undef X509_CERT_PAIR
/* Definitions which may be missing from earlier version of headers */
#ifndef CERT_STORE_OPEN_EXISTING_FLAG
#define CERT_STORE_OPEN_EXISTING_FLAG 0x00004000
#endif
#ifndef CERT_STORE_CREATE_NEW_FLAG
#define CERT_STORE_CREATE_NEW_FLAG 0x00002000
#endif
#ifndef CERT_SYSTEM_STORE_CURRENT_USER
#define CERT_SYSTEM_STORE_CURRENT_USER 0x00010000
#endif
#include <openssl/engine.h>
#include <openssl/pem.h>
#include <openssl/x509v3.h>
#include "e_capi_err.h"
#include "e_capi_err.c"
static const char *engine_capi_id = "capi";
static const char *engine_capi_name = "CryptoAPI ENGINE";
typedef struct CAPI_CTX_st CAPI_CTX;
typedef struct CAPI_KEY_st CAPI_KEY;
static void capi_addlasterror(void);
static void capi_adderror(DWORD err);
static void CAPI_trace(CAPI_CTX *ctx, char *format, ...);
static int capi_list_providers(CAPI_CTX *ctx, BIO *out);
static int capi_list_containers(CAPI_CTX *ctx, BIO *out);
int capi_list_certs(CAPI_CTX *ctx, BIO *out, char *storename);
void capi_free_key(CAPI_KEY *key);
static PCCERT_CONTEXT capi_find_cert(CAPI_CTX *ctx, const char *id, HCERTSTORE hstore);
CAPI_KEY *capi_find_key(CAPI_CTX *ctx, const char *id);
static EVP_PKEY *capi_load_privkey(ENGINE *eng, const char *key_id,
UI_METHOD *ui_method, void *callback_data);
static int capi_rsa_sign(int dtype, const unsigned char *m, unsigned int m_len,
unsigned char *sigret, unsigned int *siglen, const RSA *rsa);
static int capi_rsa_priv_enc(int flen, const unsigned char *from,
unsigned char *to, RSA *rsa, int padding);
static int capi_rsa_priv_dec(int flen, const unsigned char *from,
unsigned char *to, RSA *rsa, int padding);
static int capi_rsa_free(RSA *rsa);
static DSA_SIG *capi_dsa_do_sign(const unsigned char *digest, int dlen,
DSA *dsa);
static int capi_dsa_free(DSA *dsa);
static int capi_load_ssl_client_cert(ENGINE *e, SSL *ssl,
STACK_OF(X509_NAME) *ca_dn, X509 **pcert, EVP_PKEY **pkey,
STACK_OF(X509) **pother, UI_METHOD *ui_method, void *callback_data);
static int cert_select_simple(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs);
#ifdef OPENSSL_CAPIENG_DIALOG
static int cert_select_dialog(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs);
#endif
typedef PCCERT_CONTEXT (WINAPI *CERTDLG)(HCERTSTORE, HWND, LPCWSTR,
LPCWSTR, DWORD, DWORD,
void *);
typedef HWND (WINAPI *GETCONSWIN)(void);
/* This structure contains CAPI ENGINE specific data:
* it contains various global options and affects how
* other functions behave.
*/
#define CAPI_DBG_TRACE 2
#define CAPI_DBG_ERROR 1
struct CAPI_CTX_st {
int debug_level;
char *debug_file;
/* Parameters to use for container lookup */
DWORD keytype;
LPSTR cspname;
DWORD csptype;
/* Certificate store name to use */
LPSTR storename;
LPSTR ssl_client_store;
/* System store flags */
DWORD store_flags;
/* Lookup string meanings in load_private_key */
/* Substring of subject: uses "storename" */
#define CAPI_LU_SUBSTR 1
/* Friendly name: uses storename */
#define CAPI_LU_FNAME 2
/* Container name: uses cspname, keytype */
#define CAPI_LU_CONTNAME 3
int lookup_method;
/* Info to dump with dumpcerts option */
/* Issuer and serial name strings */
#define CAPI_DMP_SUMMARY 0x1
/* Friendly name */
#define CAPI_DMP_FNAME 0x2
/* Full X509_print dump */
#define CAPI_DMP_FULL 0x4
/* Dump PEM format certificate */
#define CAPI_DMP_PEM 0x8
/* Dump pseudo key (if possible) */
#define CAPI_DMP_PSKEY 0x10
/* Dump key info (if possible) */
#define CAPI_DMP_PKEYINFO 0x20
DWORD dump_flags;
int (*client_cert_select)(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs);
CERTDLG certselectdlg;
GETCONSWIN getconswindow;
};
static CAPI_CTX *capi_ctx_new();
static void capi_ctx_free(CAPI_CTX *ctx);
static int capi_ctx_set_provname(CAPI_CTX *ctx, LPSTR pname, DWORD type, int check);
static int capi_ctx_set_provname_idx(CAPI_CTX *ctx, int idx);
#define CAPI_CMD_LIST_CERTS ENGINE_CMD_BASE
#define CAPI_CMD_LOOKUP_CERT (ENGINE_CMD_BASE + 1)
#define CAPI_CMD_DEBUG_LEVEL (ENGINE_CMD_BASE + 2)
#define CAPI_CMD_DEBUG_FILE (ENGINE_CMD_BASE + 3)
#define CAPI_CMD_KEYTYPE (ENGINE_CMD_BASE + 4)
#define CAPI_CMD_LIST_CSPS (ENGINE_CMD_BASE + 5)
#define CAPI_CMD_SET_CSP_IDX (ENGINE_CMD_BASE + 6)
#define CAPI_CMD_SET_CSP_NAME (ENGINE_CMD_BASE + 7)
#define CAPI_CMD_SET_CSP_TYPE (ENGINE_CMD_BASE + 8)
#define CAPI_CMD_LIST_CONTAINERS (ENGINE_CMD_BASE + 9)
#define CAPI_CMD_LIST_OPTIONS (ENGINE_CMD_BASE + 10)
#define CAPI_CMD_LOOKUP_METHOD (ENGINE_CMD_BASE + 11)
#define CAPI_CMD_STORE_NAME (ENGINE_CMD_BASE + 12)
#define CAPI_CMD_STORE_FLAGS (ENGINE_CMD_BASE + 13)
static const ENGINE_CMD_DEFN capi_cmd_defns[] = {
{CAPI_CMD_LIST_CERTS,
"list_certs",
"List all certificates in store",
ENGINE_CMD_FLAG_NO_INPUT},
{CAPI_CMD_LOOKUP_CERT,
"lookup_cert",
"Lookup and output certificates",
ENGINE_CMD_FLAG_STRING},
{CAPI_CMD_DEBUG_LEVEL,
"debug_level",
"debug level (1=errors, 2=trace)",
ENGINE_CMD_FLAG_NUMERIC},
{CAPI_CMD_DEBUG_FILE,
"debug_file",
"debugging filename)",
ENGINE_CMD_FLAG_STRING},
{CAPI_CMD_KEYTYPE,
"key_type",
"Key type: 1=AT_KEYEXCHANGE (default), 2=AT_SIGNATURE",
ENGINE_CMD_FLAG_NUMERIC},
{CAPI_CMD_LIST_CSPS,
"list_csps",
"List all CSPs",
ENGINE_CMD_FLAG_NO_INPUT},
{CAPI_CMD_SET_CSP_IDX,
"csp_idx",
"Set CSP by index",
ENGINE_CMD_FLAG_NUMERIC},
{CAPI_CMD_SET_CSP_NAME,
"csp_name",
"Set CSP name, (default CSP used if not specified)",
ENGINE_CMD_FLAG_STRING},
{CAPI_CMD_SET_CSP_TYPE,
"csp_type",
"Set CSP type, (default RSA_PROV_FULL)",
ENGINE_CMD_FLAG_NUMERIC},
{CAPI_CMD_LIST_CONTAINERS,
"list_containers",
"list container names",
ENGINE_CMD_FLAG_NO_INPUT},
{CAPI_CMD_LIST_OPTIONS,
"list_options",
"Set list options (1=summary,2=friendly name, 4=full printout, 8=PEM output, 16=XXX, "
"32=private key info)",
ENGINE_CMD_FLAG_NUMERIC},
{CAPI_CMD_LOOKUP_METHOD,
"lookup_method",
"Set key lookup method (1=substring, 2=friendlyname, 3=container name)",
ENGINE_CMD_FLAG_NUMERIC},
{CAPI_CMD_STORE_NAME,
"store_name",
"certificate store name, default \"MY\"",
ENGINE_CMD_FLAG_STRING},
{CAPI_CMD_STORE_FLAGS,
"store_flags",
"Certificate store flags: 1 = system store",
ENGINE_CMD_FLAG_NUMERIC},
{0, NULL, NULL, 0}
};
static int capi_idx = -1;
static int rsa_capi_idx = -1;
static int dsa_capi_idx = -1;
static int cert_capi_idx = -1;
static int capi_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void))
{
int ret = 1;
CAPI_CTX *ctx;
BIO *out;
if (capi_idx == -1)
{
CAPIerr(CAPI_F_CAPI_CTRL, CAPI_R_ENGINE_NOT_INITIALIZED);
return 0;
}
ctx = ENGINE_get_ex_data(e, capi_idx);
out = BIO_new_fp(stdout, BIO_NOCLOSE);
switch (cmd)
{
case CAPI_CMD_LIST_CSPS:
ret = capi_list_providers(ctx, out);
break;
case CAPI_CMD_LIST_CERTS:
ret = capi_list_certs(ctx, out, NULL);
break;
case CAPI_CMD_LOOKUP_CERT:
ret = capi_list_certs(ctx, out, p);
break;
case CAPI_CMD_LIST_CONTAINERS:
ret = capi_list_containers(ctx, out);
break;
case CAPI_CMD_STORE_NAME:
if (ctx->storename)
OPENSSL_free(ctx->storename);
ctx->storename = BUF_strdup(p);
CAPI_trace(ctx, "Setting store name to %s\n", p);
break;
case CAPI_CMD_STORE_FLAGS:
if (i & 1)
{
ctx->store_flags |= CERT_SYSTEM_STORE_LOCAL_MACHINE;
ctx->store_flags &= ~CERT_SYSTEM_STORE_CURRENT_USER;
}
else
{
ctx->store_flags |= CERT_SYSTEM_STORE_CURRENT_USER;
ctx->store_flags &= ~CERT_SYSTEM_STORE_LOCAL_MACHINE;
}
CAPI_trace(ctx, "Setting flags to %d\n", i);
break;
case CAPI_CMD_DEBUG_LEVEL:
ctx->debug_level = (int)i;
CAPI_trace(ctx, "Setting debug level to %d\n", ctx->debug_level);
break;
case CAPI_CMD_DEBUG_FILE:
ctx->debug_file = BUF_strdup(p);
CAPI_trace(ctx, "Setting debug file to %s\n", ctx->debug_file);
break;
case CAPI_CMD_KEYTYPE:
ctx->keytype = i;
CAPI_trace(ctx, "Setting key type to %d\n", ctx->keytype);
break;
case CAPI_CMD_SET_CSP_IDX:
ret = capi_ctx_set_provname_idx(ctx, i);
break;
case CAPI_CMD_LIST_OPTIONS:
ctx->dump_flags = i;
break;
case CAPI_CMD_LOOKUP_METHOD:
if (i < 1 || i > 3)
{
CAPIerr(CAPI_F_CAPI_CTRL, CAPI_R_INVALID_LOOKUP_METHOD);
return 0;
}
ctx->lookup_method = i;
break;
case CAPI_CMD_SET_CSP_NAME:
ret = capi_ctx_set_provname(ctx, p, ctx->csptype, 1);
break;
case CAPI_CMD_SET_CSP_TYPE:
ctx->csptype = i;
break;
default:
CAPIerr(CAPI_F_CAPI_CTRL, CAPI_R_UNKNOWN_COMMAND);
ret = 0;
}
BIO_free(out);
return ret;
}
static RSA_METHOD capi_rsa_method =
{
"CryptoAPI RSA method",
0, /* pub_enc */
0, /* pub_dec */
capi_rsa_priv_enc, /* priv_enc */
capi_rsa_priv_dec, /* priv_dec */
0, /* rsa_mod_exp */
0, /* bn_mod_exp */
0, /* init */
capi_rsa_free, /* finish */
RSA_FLAG_SIGN_VER, /* flags */
NULL, /* app_data */
capi_rsa_sign, /* rsa_sign */
0 /* rsa_verify */
};
static DSA_METHOD capi_dsa_method =
{
"CryptoAPI DSA method",
capi_dsa_do_sign, /* dsa_do_sign */
0, /* dsa_sign_setup */
0, /* dsa_do_verify */
0, /* dsa_mod_exp */
0, /* bn_mod_exp */
0, /* init */
capi_dsa_free, /* finish */
0, /* flags */
NULL, /* app_data */
0, /* dsa_paramgen */
0 /* dsa_keygen */
};
static int capi_init(ENGINE *e)
{
CAPI_CTX *ctx;
const RSA_METHOD *ossl_rsa_meth;
const DSA_METHOD *ossl_dsa_meth;
if (capi_idx < 0)
{
capi_idx = ENGINE_get_ex_new_index(0, NULL, NULL, NULL, 0);
if (capi_idx < 0)
goto memerr;
cert_capi_idx = X509_get_ex_new_index(0, NULL, NULL, NULL, 0);
/* Setup RSA_METHOD */
rsa_capi_idx = RSA_get_ex_new_index(0, NULL, NULL, NULL, 0);
ossl_rsa_meth = RSA_PKCS1_SSLeay();
capi_rsa_method.rsa_pub_enc = ossl_rsa_meth->rsa_pub_enc;
capi_rsa_method.rsa_pub_dec = ossl_rsa_meth->rsa_pub_dec;
capi_rsa_method.rsa_mod_exp = ossl_rsa_meth->rsa_mod_exp;
capi_rsa_method.bn_mod_exp = ossl_rsa_meth->bn_mod_exp;
/* Setup DSA Method */
dsa_capi_idx = DSA_get_ex_new_index(0, NULL, NULL, NULL, 0);
ossl_dsa_meth = DSA_OpenSSL();
capi_dsa_method.dsa_do_verify = ossl_dsa_meth->dsa_do_verify;
capi_dsa_method.dsa_mod_exp = ossl_dsa_meth->dsa_mod_exp;
capi_dsa_method.bn_mod_exp = ossl_dsa_meth->bn_mod_exp;
}
ctx = capi_ctx_new();
if (!ctx)
goto memerr;
ENGINE_set_ex_data(e, capi_idx, ctx);
#ifdef OPENSSL_CAPIENG_DIALOG
{
HMODULE cryptui = LoadLibrary(TEXT("CRYPTUI.DLL"));
HMODULE kernel = GetModuleHandle(TEXT("KERNEL32.DLL"));
if (cryptui)
ctx->certselectdlg = (CERTDLG)GetProcAddress(cryptui, "CryptUIDlgSelectCertificateFromStore");
if (kernel)
ctx->getconswindow = (GETCONSWIN)GetProcAddress(kernel, "GetConsoleWindow");
if (cryptui && !OPENSSL_isservice())
ctx->client_cert_select = cert_select_dialog;
}
#endif
return 1;
memerr:
CAPIerr(CAPI_F_CAPI_INIT, ERR_R_MALLOC_FAILURE);
return 0;
return 1;
}
static int capi_destroy(ENGINE *e)
{
ERR_unload_CAPI_strings();
return 1;
}
static int capi_finish(ENGINE *e)
{
CAPI_CTX *ctx;
ctx = ENGINE_get_ex_data(e, capi_idx);
capi_ctx_free(ctx);
ENGINE_set_ex_data(e, capi_idx, NULL);
return 1;
}
/* CryptoAPI key application data. This contains
* a handle to the private key container (for sign operations)
* and a handle to the key (for decrypt operations).
*/
struct CAPI_KEY_st
{
/* Associated certificate context (if any) */
PCCERT_CONTEXT pcert;
HCRYPTPROV hprov;
HCRYPTKEY key;
DWORD keyspec;
};
static int bind_capi(ENGINE *e)
{
if (!ENGINE_set_id(e, engine_capi_id)
|| !ENGINE_set_name(e, engine_capi_name)
|| !ENGINE_set_flags(e, ENGINE_FLAGS_NO_REGISTER_ALL)
|| !ENGINE_set_init_function(e, capi_init)
|| !ENGINE_set_finish_function(e, capi_finish)
|| !ENGINE_set_destroy_function(e, capi_destroy)
|| !ENGINE_set_RSA(e, &capi_rsa_method)
|| !ENGINE_set_DSA(e, &capi_dsa_method)
|| !ENGINE_set_load_privkey_function(e, capi_load_privkey)
|| !ENGINE_set_load_ssl_client_cert_function(e,
capi_load_ssl_client_cert)
|| !ENGINE_set_cmd_defns(e, capi_cmd_defns)
|| !ENGINE_set_ctrl_function(e, capi_ctrl))
return 0;
ERR_load_CAPI_strings();
return 1;
}
#ifndef OPENSSL_NO_DYNAMIC_ENGINE
static int bind_helper(ENGINE *e, const char *id)
{
if(id && (strcmp(id, engine_capi_id) != 0))
return 0;
if(!bind_capi(e))
return 0;
return 1;
}
IMPLEMENT_DYNAMIC_CHECK_FN()
IMPLEMENT_DYNAMIC_BIND_FN(bind_helper)
#else
static ENGINE *engine_capi(void)
{
ENGINE *ret = ENGINE_new();
if(!ret)
return NULL;
if(!bind_capi(ret))
{
ENGINE_free(ret);
return NULL;
}
return ret;
}
void ENGINE_load_capi(void)
{
/* Copied from eng_[openssl|dyn].c */
ENGINE *toadd = engine_capi();
if(!toadd) return;
ENGINE_add(toadd);
ENGINE_free(toadd);
ERR_clear_error();
}
#endif
static int lend_tobn(BIGNUM *bn, unsigned char *bin, int binlen)
{
int i;
/* Reverse buffer in place: since this is a keyblob structure
* that will be freed up after conversion anyway it doesn't
* matter if we change it.
*/
for(i = 0; i < binlen / 2; i++)
{
unsigned char c;
c = bin[i];
bin[i] = bin[binlen - i - 1];
bin[binlen - i - 1] = c;
}
if (!BN_bin2bn(bin, binlen, bn))
return 0;
return 1;
}
/* Given a CAPI_KEY get an EVP_PKEY structure */
static EVP_PKEY *capi_get_pkey(ENGINE *eng, CAPI_KEY *key)
{
unsigned char *pubkey = NULL;
DWORD len;
BLOBHEADER *bh;
RSA *rkey = NULL;
DSA *dkey = NULL;
EVP_PKEY *ret = NULL;
if (!CryptExportKey(key->key, 0, PUBLICKEYBLOB, 0, NULL, &len))
{
CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_PUBKEY_EXPORT_LENGTH_ERROR);
capi_addlasterror();
return NULL;
}
pubkey = OPENSSL_malloc(len);
if (!pubkey)
goto memerr;
if (!CryptExportKey(key->key, 0, PUBLICKEYBLOB, 0, pubkey, &len))
{
CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_PUBKEY_EXPORT_ERROR);
capi_addlasterror();
goto err;
}
bh = (BLOBHEADER *)pubkey;
if (bh->bType != PUBLICKEYBLOB)
{
CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_INVALID_PUBLIC_KEY_BLOB);
goto err;
}
if (bh->aiKeyAlg == CALG_RSA_SIGN || bh->aiKeyAlg == CALG_RSA_KEYX)
{
RSAPUBKEY *rp;
DWORD rsa_modlen;
unsigned char *rsa_modulus;
rp = (RSAPUBKEY *)(bh + 1);
if (rp->magic != 0x31415352)
{
char magstr[10];
BIO_snprintf(magstr, 10, "%lx", rp->magic);
CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_INVALID_RSA_PUBLIC_KEY_BLOB_MAGIC_NUMBER);
ERR_add_error_data(2, "magic=0x", magstr);
goto err;
}
rsa_modulus = (unsigned char *)(rp + 1);
rkey = RSA_new_method(eng);
if (!rkey)
goto memerr;
rkey->e = BN_new();
rkey->n = BN_new();
if (!rkey->e || !rkey->n)
goto memerr;
if (!BN_set_word(rkey->e, rp->pubexp))
goto memerr;
rsa_modlen = rp->bitlen / 8;
if (!lend_tobn(rkey->n, rsa_modulus, rsa_modlen))
goto memerr;
RSA_set_ex_data(rkey, rsa_capi_idx, key);
if (!(ret = EVP_PKEY_new()))
goto memerr;
EVP_PKEY_assign_RSA(ret, rkey);
rkey = NULL;
}
else if (bh->aiKeyAlg == CALG_DSS_SIGN)
{
DSSPUBKEY *dp;
DWORD dsa_plen;
unsigned char *btmp;
dp = (DSSPUBKEY *)(bh + 1);
if (dp->magic != 0x31535344)
{
char magstr[10];
BIO_snprintf(magstr, 10, "%lx", dp->magic);
CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_INVALID_DSA_PUBLIC_KEY_BLOB_MAGIC_NUMBER);
ERR_add_error_data(2, "magic=0x", magstr);
goto err;
}
dsa_plen = dp->bitlen / 8;
btmp = (unsigned char *)(dp + 1);
dkey = DSA_new_method(eng);
if (!dkey)
goto memerr;
dkey->p = BN_new();
dkey->q = BN_new();
dkey->g = BN_new();
dkey->pub_key = BN_new();
if (!dkey->p || !dkey->q || !dkey->g || !dkey->pub_key)
goto memerr;
if (!lend_tobn(dkey->p, btmp, dsa_plen))
goto memerr;
btmp += dsa_plen;
if (!lend_tobn(dkey->q, btmp, 20))
goto memerr;
btmp += 20;
if (!lend_tobn(dkey->g, btmp, dsa_plen))
goto memerr;
btmp += dsa_plen;
if (!lend_tobn(dkey->pub_key, btmp, dsa_plen))
goto memerr;
btmp += dsa_plen;
DSA_set_ex_data(dkey, dsa_capi_idx, key);
if (!(ret = EVP_PKEY_new()))
goto memerr;
EVP_PKEY_assign_DSA(ret, dkey);
dkey = NULL;
}
else
{
char algstr[10];
BIO_snprintf(algstr, 10, "%lx", bh->aiKeyAlg);
CAPIerr(CAPI_F_CAPI_GET_PKEY, CAPI_R_UNSUPPORTED_PUBLIC_KEY_ALGORITHM);
ERR_add_error_data(2, "aiKeyAlg=0x", algstr);
goto err;
}
err:
if (pubkey)
OPENSSL_free(pubkey);
if (!ret)
{
if (rkey)
RSA_free(rkey);
if (dkey)
DSA_free(dkey);
}
return ret;
memerr:
CAPIerr(CAPI_F_CAPI_GET_PKEY, ERR_R_MALLOC_FAILURE);
goto err;
}
static EVP_PKEY *capi_load_privkey(ENGINE *eng, const char *key_id,
UI_METHOD *ui_method, void *callback_data)
{
CAPI_CTX *ctx;
CAPI_KEY *key;
EVP_PKEY *ret;
ctx = ENGINE_get_ex_data(eng, capi_idx);
if (!ctx)
{
CAPIerr(CAPI_F_CAPI_LOAD_PRIVKEY, CAPI_R_CANT_FIND_CAPI_CONTEXT);
return NULL;
}
key = capi_find_key(ctx, key_id);
if (!key)
return NULL;
ret = capi_get_pkey(eng, key);
if (!ret)
capi_free_key(key);
return ret;
}
/* CryptoAPI RSA operations */
int capi_rsa_priv_enc(int flen, const unsigned char *from,
unsigned char *to, RSA *rsa, int padding)
{
CAPIerr(CAPI_F_CAPI_RSA_PRIV_ENC, CAPI_R_FUNCTION_NOT_SUPPORTED);
return -1;
}
int capi_rsa_sign(int dtype, const unsigned char *m, unsigned int m_len,
unsigned char *sigret, unsigned int *siglen, const RSA *rsa)
{
ALG_ID alg;
HCRYPTHASH hash;
DWORD slen;
unsigned int i;
int ret = -1;
CAPI_KEY *capi_key;
CAPI_CTX *ctx;
ctx = ENGINE_get_ex_data(rsa->engine, capi_idx);
CAPI_trace(ctx, "Called CAPI_rsa_sign()\n");
capi_key = RSA_get_ex_data(rsa, rsa_capi_idx);
if (!capi_key)
{
CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_CANT_GET_KEY);
return -1;
}
/* Convert the signature type to a CryptoAPI algorithm ID */
switch(dtype)
{
case NID_sha1:
alg = CALG_SHA1;
break;
case NID_md5:
alg = CALG_MD5;
break;
case NID_md5_sha1:
alg = CALG_SSL3_SHAMD5;
break;
default:
{
char algstr[10];
BIO_snprintf(algstr, 10, "%lx", dtype);
CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_UNSUPPORTED_ALGORITHM_NID);
ERR_add_error_data(2, "NID=0x", algstr);
return -1;
}
}
/* Create the hash object */
if(!CryptCreateHash(capi_key->hprov, alg, 0, 0, &hash))
{
CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_CANT_CREATE_HASH_OBJECT);
capi_addlasterror();
return -1;
}
/* Set the hash value to the value passed */
if(!CryptSetHashParam(hash, HP_HASHVAL, (unsigned char *)m, 0))
{
CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_CANT_SET_HASH_VALUE);
capi_addlasterror();
goto err;
}
/* Finally sign it */
slen = RSA_size(rsa);
if(!CryptSignHashA(hash, capi_key->keyspec, NULL, 0, sigret, &slen))
{
CAPIerr(CAPI_F_CAPI_RSA_SIGN, CAPI_R_ERROR_SIGNING_HASH);
capi_addlasterror();
goto err;
}
else
{
ret = 1;
/* Inplace byte reversal of signature */
for(i = 0; i < slen / 2; i++)
{
unsigned char c;
c = sigret[i];
sigret[i] = sigret[slen - i - 1];
sigret[slen - i - 1] = c;
}
*siglen = slen;
}
/* Now cleanup */
err:
CryptDestroyHash(hash);
return ret;
}
int capi_rsa_priv_dec(int flen, const unsigned char *from,
unsigned char *to, RSA *rsa, int padding)
{
int i;
unsigned char *tmpbuf;
CAPI_KEY *capi_key;
CAPI_CTX *ctx;
ctx = ENGINE_get_ex_data(rsa->engine, capi_idx);
CAPI_trace(ctx, "Called capi_rsa_priv_dec()\n");
capi_key = RSA_get_ex_data(rsa, rsa_capi_idx);
if (!capi_key)
{
CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, CAPI_R_CANT_GET_KEY);
return -1;
}
if(padding != RSA_PKCS1_PADDING)
{
char errstr[10];
BIO_snprintf(errstr, 10, "%d", padding);
CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, CAPI_R_UNSUPPORTED_PADDING);
ERR_add_error_data(2, "padding=", errstr);
return -1;
}
/* Create temp reverse order version of input */
if(!(tmpbuf = OPENSSL_malloc(flen)) )
{
CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, ERR_R_MALLOC_FAILURE);
return -1;
}
for(i = 0; i < flen; i++)
tmpbuf[flen - i - 1] = from[i];
/* Finally decrypt it */
if(!CryptDecrypt(capi_key->key, 0, TRUE, 0, tmpbuf, &flen))
{
CAPIerr(CAPI_F_CAPI_RSA_PRIV_DEC, CAPI_R_DECRYPT_ERROR);
capi_addlasterror();
OPENSSL_free(tmpbuf);
return -1;
}
else memcpy(to, tmpbuf, flen);
OPENSSL_free(tmpbuf);
return flen;
}
static int capi_rsa_free(RSA *rsa)
{
CAPI_KEY *capi_key;
capi_key = RSA_get_ex_data(rsa, rsa_capi_idx);
capi_free_key(capi_key);
RSA_set_ex_data(rsa, rsa_capi_idx, 0);
return 1;
}
/* CryptoAPI DSA operations */
static DSA_SIG *capi_dsa_do_sign(const unsigned char *digest, int dlen,
DSA *dsa)
{
HCRYPTHASH hash;
DWORD slen;
DSA_SIG *ret = NULL;
CAPI_KEY *capi_key;
CAPI_CTX *ctx;
unsigned char csigbuf[40];
ctx = ENGINE_get_ex_data(dsa->engine, capi_idx);
CAPI_trace(ctx, "Called CAPI_dsa_do_sign()\n");
capi_key = DSA_get_ex_data(dsa, dsa_capi_idx);
if (!capi_key)
{
CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_CANT_GET_KEY);
return NULL;
}
if (dlen != 20)
{
CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_INVALID_DIGEST_LENGTH);
return NULL;
}
/* Create the hash object */
if(!CryptCreateHash(capi_key->hprov, CALG_SHA1, 0, 0, &hash))
{
CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_CANT_CREATE_HASH_OBJECT);
capi_addlasterror();
return NULL;
}
/* Set the hash value to the value passed */
if(!CryptSetHashParam(hash, HP_HASHVAL, (unsigned char *)digest, 0))
{
CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_CANT_SET_HASH_VALUE);
capi_addlasterror();
goto err;
}
/* Finally sign it */
slen = sizeof(csigbuf);
if(!CryptSignHashA(hash, capi_key->keyspec, NULL, 0, csigbuf, &slen))
{
CAPIerr(CAPI_F_CAPI_DSA_DO_SIGN, CAPI_R_ERROR_SIGNING_HASH);
capi_addlasterror();
goto err;
}
else
{
ret = DSA_SIG_new();
if (!ret)
goto err;
ret->r = BN_new();
ret->s = BN_new();
if (!ret->r || !ret->s)
goto err;
if (!lend_tobn(ret->r, csigbuf, 20)
|| !lend_tobn(ret->s, csigbuf + 20, 20))
{
DSA_SIG_free(ret);
ret = NULL;
goto err;
}
}
/* Now cleanup */
err:
OPENSSL_cleanse(csigbuf, 40);
CryptDestroyHash(hash);
return ret;
}
static int capi_dsa_free(DSA *dsa)
{
CAPI_KEY *capi_key;
capi_key = DSA_get_ex_data(dsa, dsa_capi_idx);
capi_free_key(capi_key);
DSA_set_ex_data(dsa, dsa_capi_idx, 0);
return 1;
}
static void capi_vtrace(CAPI_CTX *ctx, int level, char *format, va_list argptr)
{
BIO *out;
if (!ctx || (ctx->debug_level < level) || (!ctx->debug_file))
return;
out = BIO_new_file(ctx->debug_file, "a+");
BIO_vprintf(out, format, argptr);
BIO_free(out);
}
static void CAPI_trace(CAPI_CTX *ctx, char *format, ...)
{
va_list args;
va_start(args, format);
capi_vtrace(ctx, CAPI_DBG_TRACE, format, args);
va_end(args);
}
static void capi_addlasterror(void)
{
capi_adderror(GetLastError());
}
static void capi_adderror(DWORD err)
{
char errstr[10];
BIO_snprintf(errstr, 10, "%lX", err);
ERR_add_error_data(2, "Error code= 0x", errstr);
}
static char *wide_to_asc(LPWSTR wstr)
{
char *str;
int len_0,sz;
if (!wstr)
return NULL;
len_0 = (int)wcslen(wstr)+1; /* WideCharToMultiByte expects int */
sz = WideCharToMultiByte(CP_ACP,0,wstr,len_0,NULL,0,NULL,NULL);
if (!sz)
{
CAPIerr(CAPI_F_WIDE_TO_ASC, CAPI_R_WIN32_ERROR);
return NULL;
}
str = OPENSSL_malloc(sz);
if (!str)
{
CAPIerr(CAPI_F_WIDE_TO_ASC, ERR_R_MALLOC_FAILURE);
return NULL;
}
if (!WideCharToMultiByte(CP_ACP,0,wstr,len_0,str,sz,NULL,NULL))
{
OPENSSL_free(str);
CAPIerr(CAPI_F_WIDE_TO_ASC, CAPI_R_WIN32_ERROR);
return NULL;
}
return str;
}
static int capi_get_provname(CAPI_CTX *ctx, LPSTR *pname, DWORD *ptype, DWORD idx)
{
LPSTR name;
DWORD len, err;
CAPI_trace(ctx, "capi_get_provname, index=%d\n", idx);
if (!CryptEnumProvidersA(idx, NULL, 0, ptype, NULL, &len))
{
err = GetLastError();
if (err == ERROR_NO_MORE_ITEMS)
return 2;
CAPIerr(CAPI_F_CAPI_GET_PROVNAME, CAPI_R_CRYPTENUMPROVIDERS_ERROR);
capi_adderror(err);
return 0;
}
name = OPENSSL_malloc(len);
if (!CryptEnumProvidersA(idx, NULL, 0, ptype, name, &len))
{
err = GetLastError();
if (err == ERROR_NO_MORE_ITEMS)
return 2;
CAPIerr(CAPI_F_CAPI_GET_PROVNAME, CAPI_R_CRYPTENUMPROVIDERS_ERROR);
capi_adderror(err);
return 0;
}
*pname = name;
CAPI_trace(ctx, "capi_get_provname, returned name=%s, type=%d\n", name, *ptype);
return 1;
}
static int capi_list_providers(CAPI_CTX *ctx, BIO *out)
{
DWORD idx, ptype;
int ret;
LPSTR provname = NULL;
CAPI_trace(ctx, "capi_list_providers\n");
BIO_printf(out, "Available CSPs:\n");
for(idx = 0; ; idx++)
{
ret = capi_get_provname(ctx, &provname, &ptype, idx);
if (ret == 2)
break;
if (ret == 0)
break;
BIO_printf(out, "%d. %s, type %d\n", idx, provname, ptype);
OPENSSL_free(provname);
}
return 1;
}
static int capi_list_containers(CAPI_CTX *ctx, BIO *out)
{
int ret = 1;
HCRYPTPROV hprov;
DWORD err, idx, flags, buflen = 0, clen;
LPSTR cname;
CAPI_trace(ctx, "Listing containers CSP=%s, type = %d\n", ctx->cspname, ctx->csptype);
if (!CryptAcquireContextA(&hprov, NULL, ctx->cspname, ctx->csptype, CRYPT_VERIFYCONTEXT))
{
CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, CAPI_R_CRYPTACQUIRECONTEXT_ERROR);
capi_addlasterror();
return 0;
}
if (!CryptGetProvParam(hprov, PP_ENUMCONTAINERS, NULL, &buflen, CRYPT_FIRST))
{
CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, CAPI_R_ENUMCONTAINERS_ERROR);
capi_addlasterror();
CryptReleaseContext(hprov, 0);
return 0;
}
CAPI_trace(ctx, "Got max container len %d\n", buflen);
if (buflen == 0)
buflen = 1024;
cname = OPENSSL_malloc(buflen);
if (!cname)
{
CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, ERR_R_MALLOC_FAILURE);
goto err;
}
for (idx = 0;;idx++)
{
clen = buflen;
cname[0] = 0;
if (idx == 0)
flags = CRYPT_FIRST;
else
flags = 0;
if(!CryptGetProvParam(hprov, PP_ENUMCONTAINERS, cname, &clen, flags))
{
err = GetLastError();
if (err == ERROR_NO_MORE_ITEMS)
goto done;
CAPIerr(CAPI_F_CAPI_LIST_CONTAINERS, CAPI_R_ENUMCONTAINERS_ERROR);
capi_adderror(err);
goto err;
}
CAPI_trace(ctx, "Container name %s, len=%d, index=%d, flags=%d\n", cname, clen, idx, flags);
if (!cname[0] && (clen == buflen))
{
CAPI_trace(ctx, "Enumerate bug: using workaround\n");
goto done;
}
BIO_printf(out, "%d. %s\n", idx, cname);
}
err:
ret = 0;
done:
if (cname)
OPENSSL_free(cname);
CryptReleaseContext(hprov, 0);
return ret;
}
CRYPT_KEY_PROV_INFO *capi_get_prov_info(CAPI_CTX *ctx, PCCERT_CONTEXT cert)
{
DWORD len;
CRYPT_KEY_PROV_INFO *pinfo;
if(!CertGetCertificateContextProperty(cert, CERT_KEY_PROV_INFO_PROP_ID, NULL, &len))
return NULL;
pinfo = OPENSSL_malloc(len);
if (!pinfo)
{
CAPIerr(CAPI_F_CAPI_GET_PROV_INFO, ERR_R_MALLOC_FAILURE);
return NULL;
}
if(!CertGetCertificateContextProperty(cert, CERT_KEY_PROV_INFO_PROP_ID, pinfo, &len))
{
CAPIerr(CAPI_F_CAPI_GET_PROV_INFO, CAPI_R_ERROR_GETTING_KEY_PROVIDER_INFO);
capi_addlasterror();
OPENSSL_free(pinfo);
return NULL;
}
return pinfo;
}
static void capi_dump_prov_info(CAPI_CTX *ctx, BIO *out, CRYPT_KEY_PROV_INFO *pinfo)
{
char *provname = NULL, *contname = NULL;
if (!pinfo)
{
BIO_printf(out, " No Private Key\n");
return;
}
provname = wide_to_asc(pinfo->pwszProvName);
contname = wide_to_asc(pinfo->pwszContainerName);
if (!provname || !contname)
goto err;
BIO_printf(out, " Private Key Info:\n");
BIO_printf(out, " Provider Name: %s, Provider Type %d\n", provname, pinfo->dwProvType);
BIO_printf(out, " Container Name: %s, Key Type %d\n", contname, pinfo->dwKeySpec);
err:
if (provname)
OPENSSL_free(provname);
if (contname)
OPENSSL_free(contname);
}
char * capi_cert_get_fname(CAPI_CTX *ctx, PCCERT_CONTEXT cert)
{
LPWSTR wfname;
DWORD dlen;
CAPI_trace(ctx, "capi_cert_get_fname\n");
if (!CertGetCertificateContextProperty(cert, CERT_FRIENDLY_NAME_PROP_ID, NULL, &dlen))
return NULL;
wfname = OPENSSL_malloc(dlen);
if (CertGetCertificateContextProperty(cert, CERT_FRIENDLY_NAME_PROP_ID, wfname, &dlen))
{
char *fname = wide_to_asc(wfname);
OPENSSL_free(wfname);
return fname;
}
CAPIerr(CAPI_F_CAPI_CERT_GET_FNAME, CAPI_R_ERROR_GETTING_FRIENDLY_NAME);
capi_addlasterror();
OPENSSL_free(wfname);
return NULL;
}
void capi_dump_cert(CAPI_CTX *ctx, BIO *out, PCCERT_CONTEXT cert)
{
X509 *x;
unsigned char *p;
unsigned long flags = ctx->dump_flags;
if (flags & CAPI_DMP_FNAME)
{
char *fname;
fname = capi_cert_get_fname(ctx, cert);
if (fname)
{
BIO_printf(out, " Friendly Name \"%s\"\n", fname);
OPENSSL_free(fname);
}
else
BIO_printf(out, " <No Friendly Name>\n");
}
p = cert->pbCertEncoded;
x = d2i_X509(NULL, &p, cert->cbCertEncoded);
if (!x)
BIO_printf(out, " <Can't parse certificate>\n");
if (flags & CAPI_DMP_SUMMARY)
{
BIO_printf(out, " Subject: ");
X509_NAME_print_ex(out, X509_get_subject_name(x), 0, XN_FLAG_ONELINE);
BIO_printf(out, "\n Issuer: ");
X509_NAME_print_ex(out, X509_get_issuer_name(x), 0, XN_FLAG_ONELINE);
BIO_printf(out, "\n");
}
if (flags & CAPI_DMP_FULL)
X509_print_ex(out, x, XN_FLAG_ONELINE,0);
if (flags & CAPI_DMP_PKEYINFO)
{
CRYPT_KEY_PROV_INFO *pinfo;
pinfo = capi_get_prov_info(ctx, cert);
capi_dump_prov_info(ctx, out, pinfo);
if (pinfo)
OPENSSL_free(pinfo);
}
if (flags & CAPI_DMP_PEM)
PEM_write_bio_X509(out, x);
X509_free(x);
}
HCERTSTORE capi_open_store(CAPI_CTX *ctx, char *storename)
{
HCERTSTORE hstore;
if (!storename)
storename = ctx->storename;
if (!storename)
storename = "MY";
CAPI_trace(ctx, "Opening certificate store %s\n", storename);
hstore = CertOpenStore(CERT_STORE_PROV_SYSTEM_A, 0, 0,
ctx->store_flags, storename);
if (!hstore)
{
CAPIerr(CAPI_F_CAPI_OPEN_STORE, CAPI_R_ERROR_OPENING_STORE);
capi_addlasterror();
}
return hstore;
}
int capi_list_certs(CAPI_CTX *ctx, BIO *out, char *id)
{
char *storename;
int idx;
int ret = 1;
HCERTSTORE hstore;
PCCERT_CONTEXT cert = NULL;
storename = ctx->storename;
if (!storename)
storename = "MY";
CAPI_trace(ctx, "Listing certs for store %s\n", storename);
hstore = capi_open_store(ctx, storename);
if (!hstore)
return 0;
if (id)
{
cert = capi_find_cert(ctx, id, hstore);
if (!cert)
{
ret = 0;
goto err;
}
capi_dump_cert(ctx, out, cert);
CertFreeCertificateContext(cert);
}
else
{
for(idx = 0;;idx++)
{
LPWSTR fname = NULL;
cert = CertEnumCertificatesInStore(hstore, cert);
if (!cert)
break;
BIO_printf(out, "Certificate %d\n", idx);
capi_dump_cert(ctx, out, cert);
}
}
err:
CertCloseStore(hstore, 0);
return ret;
}
static PCCERT_CONTEXT capi_find_cert(CAPI_CTX *ctx, const char *id, HCERTSTORE hstore)
{
PCCERT_CONTEXT cert = NULL;
char *fname = NULL;
int match;
switch(ctx->lookup_method)
{
case CAPI_LU_SUBSTR:
return CertFindCertificateInStore(hstore,
X509_ASN_ENCODING, 0,
CERT_FIND_SUBJECT_STR_A, id, NULL);
case CAPI_LU_FNAME:
for(;;)
{
cert = CertEnumCertificatesInStore(hstore, cert);
if (!cert)
return NULL;
fname = capi_cert_get_fname(ctx, cert);
if (fname)
{
if (strcmp(fname, id))
match = 0;
else
match = 1;
OPENSSL_free(fname);
if (match)
return cert;
}
}
default:
return NULL;
}
}
static CAPI_KEY *capi_get_key(CAPI_CTX *ctx, const char *contname, char *provname, DWORD ptype, DWORD keyspec)
{
CAPI_KEY *key;
DWORD dwFlags = 0;
key = OPENSSL_malloc(sizeof(CAPI_KEY));
CAPI_trace(ctx, "capi_get_key, contname=%s, provname=%s, type=%d\n",
contname, provname, ptype);
if(ctx->store_flags & CERT_SYSTEM_STORE_LOCAL_MACHINE)
dwFlags = CRYPT_MACHINE_KEYSET;
if (!CryptAcquireContextA(&key->hprov, contname, provname, ptype, dwFlags))
{
CAPIerr(CAPI_F_CAPI_GET_KEY, CAPI_R_CRYPTACQUIRECONTEXT_ERROR);
capi_addlasterror();
goto err;
}
if (!CryptGetUserKey(key->hprov, keyspec, &key->key))
{
CAPIerr(CAPI_F_CAPI_GET_KEY, CAPI_R_GETUSERKEY_ERROR);
capi_addlasterror();
CryptReleaseContext(key->hprov, 0);
goto err;
}
key->keyspec = keyspec;
key->pcert = NULL;
return key;
err:
OPENSSL_free(key);
return NULL;
}
static CAPI_KEY *capi_get_cert_key(CAPI_CTX *ctx, PCCERT_CONTEXT cert)
{
CAPI_KEY *key = NULL;
CRYPT_KEY_PROV_INFO *pinfo = NULL;
char *provname = NULL, *contname = NULL;
pinfo = capi_get_prov_info(ctx, cert);
if (!pinfo)
goto err;
provname = wide_to_asc(pinfo->pwszProvName);
contname = wide_to_asc(pinfo->pwszContainerName);
if (!provname || !contname)
goto err;
key = capi_get_key(ctx, contname, provname,
pinfo->dwProvType, pinfo->dwKeySpec);
err:
if (pinfo)
OPENSSL_free(pinfo);
if (provname)
OPENSSL_free(provname);
if (contname)
OPENSSL_free(contname);
return key;
}
CAPI_KEY *capi_find_key(CAPI_CTX *ctx, const char *id)
{
PCCERT_CONTEXT cert;
HCERTSTORE hstore;
CAPI_KEY *key = NULL;
switch (ctx->lookup_method)
{
case CAPI_LU_SUBSTR:
case CAPI_LU_FNAME:
hstore = capi_open_store(ctx, NULL);
if (!hstore)
return NULL;
cert = capi_find_cert(ctx, id, hstore);
if (cert)
{
key = capi_get_cert_key(ctx, cert);
CertFreeCertificateContext(cert);
}
CertCloseStore(hstore, 0);
break;
case CAPI_LU_CONTNAME:
key = capi_get_key(ctx, id, ctx->cspname, ctx->csptype,
ctx->keytype);
break;
}
return key;
}
void capi_free_key(CAPI_KEY *key)
{
if (!key)
return;
CryptDestroyKey(key->key);
CryptReleaseContext(key->hprov, 0);
if (key->pcert)
CertFreeCertificateContext(key->pcert);
OPENSSL_free(key);
}
/* Initialize a CAPI_CTX structure */
static CAPI_CTX *capi_ctx_new()
{
CAPI_CTX *ctx;
ctx = OPENSSL_malloc(sizeof(CAPI_CTX));
if (!ctx)
{
CAPIerr(CAPI_F_CAPI_CTX_NEW, ERR_R_MALLOC_FAILURE);
return NULL;
}
ctx->cspname = NULL;
ctx->csptype = PROV_RSA_FULL;
ctx->dump_flags = CAPI_DMP_SUMMARY|CAPI_DMP_FNAME;
ctx->keytype = AT_KEYEXCHANGE;
ctx->storename = NULL;
ctx->ssl_client_store = NULL;
ctx->store_flags = CERT_STORE_OPEN_EXISTING_FLAG |
CERT_STORE_READONLY_FLAG |
CERT_SYSTEM_STORE_CURRENT_USER;
ctx->lookup_method = CAPI_LU_SUBSTR;
ctx->debug_level = 0;
ctx->debug_file = NULL;
ctx->client_cert_select = cert_select_simple;
return ctx;
}
static void capi_ctx_free(CAPI_CTX *ctx)
{
CAPI_trace(ctx, "Calling capi_ctx_free with %lx\n", ctx);
if (!ctx)
return;
if (ctx->cspname)
OPENSSL_free(ctx->cspname);
if (ctx->debug_file)
OPENSSL_free(ctx->debug_file);
if (ctx->storename)
OPENSSL_free(ctx->storename);
if (ctx->ssl_client_store)
OPENSSL_free(ctx->ssl_client_store);
OPENSSL_free(ctx);
}
static int capi_ctx_set_provname(CAPI_CTX *ctx, LPSTR pname, DWORD type, int check)
{
CAPI_trace(ctx, "capi_ctx_set_provname, name=%s, type=%d\n", pname, type);
if (check)
{
HCRYPTPROV hprov;
if (!CryptAcquireContextA(&hprov, NULL, pname, type,
CRYPT_VERIFYCONTEXT))
{
CAPIerr(CAPI_F_CAPI_CTX_SET_PROVNAME, CAPI_R_CRYPTACQUIRECONTEXT_ERROR);
capi_addlasterror();
return 0;
}
CryptReleaseContext(hprov, 0);
}
if (ctx->cspname)
OPENSSL_free(ctx->cspname);
ctx->cspname = BUF_strdup(pname);
ctx->csptype = type;
return 1;
}
static int capi_ctx_set_provname_idx(CAPI_CTX *ctx, int idx)
{
LPSTR pname;
DWORD type;
int res;
if (capi_get_provname(ctx, &pname, &type, idx) != 1)
return 0;
res = capi_ctx_set_provname(ctx, pname, type, 0);
OPENSSL_free(pname);
return res;
}
static int cert_issuer_match(STACK_OF(X509_NAME) *ca_dn, X509 *x)
{
int i;
X509_NAME *nm;
/* Special case: empty list: match anything */
if (sk_X509_NAME_num(ca_dn) <= 0)
return 1;
for (i = 0; i < sk_X509_NAME_num(ca_dn); i++)
{
nm = sk_X509_NAME_value(ca_dn, i);
if (!X509_NAME_cmp(nm, X509_get_issuer_name(x)))
return 1;
}
return 0;
}
static int capi_load_ssl_client_cert(ENGINE *e, SSL *ssl,
STACK_OF(X509_NAME) *ca_dn, X509 **pcert, EVP_PKEY **pkey,
STACK_OF(X509) **pother, UI_METHOD *ui_method, void *callback_data)
{
STACK_OF(X509) *certs = NULL;
X509 *x;
char *storename;
const char *p;
int i, client_cert_idx;
HCERTSTORE hstore;
PCCERT_CONTEXT cert = NULL, excert = NULL;
CAPI_CTX *ctx;
CAPI_KEY *key;
ctx = ENGINE_get_ex_data(e, capi_idx);
*pcert = NULL;
*pkey = NULL;
storename = ctx->ssl_client_store;
if (!storename)
storename = "MY";
hstore = capi_open_store(ctx, storename);
if (!hstore)
return 0;
/* Enumerate all certificates collect any matches */
for(i = 0;;i++)
{
cert = CertEnumCertificatesInStore(hstore, cert);
if (!cert)
break;
p = cert->pbCertEncoded;
x = d2i_X509(NULL, &p, cert->cbCertEncoded);
if (!x)
{
CAPI_trace(ctx, "Can't Parse Certificate %d\n", i);
continue;
}
if (cert_issuer_match(ca_dn, x)
&& X509_check_purpose(x, X509_PURPOSE_SSL_CLIENT, 0))
{
key = capi_get_cert_key(ctx, cert);
if (!key)
{
X509_free(x);
continue;
}
/* Match found: attach extra data to it so
* we can retrieve the key later.
*/
excert = CertDuplicateCertificateContext(cert);
key->pcert = excert;
X509_set_ex_data(x, cert_capi_idx, key);
if (!certs)
certs = sk_X509_new_null();
sk_X509_push(certs, x);
}
else
X509_free(x);
}
if (cert)
CertFreeCertificateContext(cert);
if (hstore)
CertCloseStore(hstore, 0);
if (!certs)
return 0;
/* Select the appropriate certificate */
client_cert_idx = ctx->client_cert_select(e, ssl, certs);
/* Set the selected certificate and free the rest */
for(i = 0; i < sk_X509_num(certs); i++)
{
x = sk_X509_value(certs, i);
if (i == client_cert_idx)
*pcert = x;
else
{
key = X509_get_ex_data(x, cert_capi_idx);
capi_free_key(key);
X509_free(x);
}
}
sk_X509_free(certs);
if (!*pcert)
return 0;
/* Setup key for selected certificate */
key = X509_get_ex_data(*pcert, cert_capi_idx);
*pkey = capi_get_pkey(e, key);
X509_set_ex_data(*pcert, cert_capi_idx, NULL);
return 1;
}
/* Simple client cert selection function: always select first */
static int cert_select_simple(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs)
{
return 0;
}
#ifdef OPENSSL_CAPIENG_DIALOG
/* More complex cert selection function, using standard function
* CryptUIDlgSelectCertificateFromStore() to produce a dialog box.
*/
/* Definitions which are in cryptuiapi.h but this is not present in older
* versions of headers.
*/
#ifndef CRYPTUI_SELECT_LOCATION_COLUMN
#define CRYPTUI_SELECT_LOCATION_COLUMN 0x000000010
#define CRYPTUI_SELECT_INTENDEDUSE_COLUMN 0x000000004
#endif
#define dlg_title L"OpenSSL Application SSL Client Certificate Selection"
#define dlg_prompt L"Select a certificate to use for authentication"
#define dlg_columns CRYPTUI_SELECT_LOCATION_COLUMN \
|CRYPTUI_SELECT_INTENDEDUSE_COLUMN
static int cert_select_dialog(ENGINE *e, SSL *ssl, STACK_OF(X509) *certs)
{
X509 *x;
HCERTSTORE dstore;
PCCERT_CONTEXT cert;
CAPI_CTX *ctx;
CAPI_KEY *key;
HWND hwnd;
int i, idx = -1;
if (sk_X509_num(certs) == 1)
return 0;
ctx = ENGINE_get_ex_data(e, capi_idx);
/* Create an in memory store of certificates */
dstore = CertOpenStore(CERT_STORE_PROV_MEMORY, 0, 0,
CERT_STORE_CREATE_NEW_FLAG, NULL);
if (!dstore)
{
CAPIerr(CAPI_F_CERT_SELECT_DIALOG, CAPI_R_ERROR_CREATING_STORE);
capi_addlasterror();
goto err;
}
/* Add all certificates to store */
for(i = 0; i < sk_X509_num(certs); i++)
{
x = sk_X509_value(certs, i);
key = X509_get_ex_data(x, cert_capi_idx);
if (!CertAddCertificateContextToStore(dstore, key->pcert,
CERT_STORE_ADD_NEW, NULL))
{
CAPIerr(CAPI_F_CERT_SELECT_DIALOG, CAPI_R_ERROR_ADDING_CERT);
capi_addlasterror();
goto err;
}
}
hwnd = GetForegroundWindow();
if (!hwnd)
hwnd = GetActiveWindow();
if (!hwnd && ctx->getconswindow)
hwnd = ctx->getconswindow();
/* Call dialog to select one */
cert = ctx->certselectdlg(dstore, hwnd, dlg_title, dlg_prompt,
dlg_columns, 0, NULL);
/* Find matching cert from list */
if (cert)
{
for(i = 0; i < sk_X509_num(certs); i++)
{
x = sk_X509_value(certs, i);
key = X509_get_ex_data(x, cert_capi_idx);
if (CertCompareCertificate(
X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
cert->pCertInfo,
key->pcert->pCertInfo))
{
idx = i;
break;
}
}
}
err:
if (dstore)
CertCloseStore(dstore, 0);
return idx;
}
#endif
#else /* !__COMPILE_CAPIENG */
#include <openssl/engine.h>
#ifndef OPENSSL_NO_DYNAMIC_ENGINE
OPENSSL_EXPORT
int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns);
OPENSSL_EXPORT
int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns) { return 0; }
IMPLEMENT_DYNAMIC_CHECK_FN()
#else
void ENGINE_load_capi(void){}
#endif
#endif
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