CryptoAPI ENGINE... initial version, not compiled in yet.

2 files changed, 1208 insertions, 0 deletions

diff --git a/engines/e_capi.c b/engines/e_capi.c
new file mode 100644
index 0000000000..b19e84b8dc
--- /dev/null
+++ b/engines/e_capi.c
@@ -0,0 +1,1207 @@
+/* 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/engine.h>
+#include <openssl/rsa.h>
+#include <openssl/bn.h>
+#include <openssl/pem.h>
+
+#ifdef OPENSSL_SYS_WIN32
+#ifndef OPENSSL_NO_CAPIENG
+
+#ifndef _WIN32_WINNT
+#define _WIN32_WINNT 0x400
+#endif
+
+#include <windows.h>
+#include <wincrypt.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);
+
+/* 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;
+	LPTSTR cspname;
+	DWORD csptype;
+	/* Certificate store name to use */
+	LPTSTR storename;
+
+/* Lookup string meanings in load_private_key */
+/* Substring of subject: uses "storename" */
+#define CAPI_LU_SUBSTR		0
+/* Friendly name: uses storename */
+#define CAPI_LU_FNAME		1
+/* Container name: uses cspname, keytype */
+#define CAPI_LU_CONTNAME	2
+	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;
+};
+
+
+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)
+
+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},
+
+	{0, NULL, NULL, 0}
+	};
+
+static int capi_idx = -1;
+static int rsa_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_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 void capi_ex_free(void *obj, void *item, CRYPTO_EX_DATA *ad,
+        int ind,long argl, void *argp)
+	{
+//fprintf(stderr, "Called capi_ex_free obj=%lx, idx=%d, item=%lx\n", obj, ind, item);
+	capi_ctx_free(item);
+	}
+
+static void capi_rsa_ex_free(void *obj, void *item, CRYPTO_EX_DATA *ad,
+        int ind,long argl, void *argp)
+	{
+//fprintf(stderr, "Called capi_rsa_free_key\n");
+
+	capi_free_key(item);
+	}
+
+static int capi_init(ENGINE *e)
+	{
+	CAPI_CTX *ctx;
+	const RSA_METHOD *ossl_meth;
+	capi_idx = ENGINE_get_ex_new_index(0, NULL, NULL, NULL, /*capi_ex_free*/ 0);
+
+	ctx = capi_ctx_new();
+	if (!ctx || (capi_idx < 0))
+		goto memerr;
+
+	ENGINE_set_ex_data(e, capi_idx, ctx);
+	/* Setup RSA_METHOD */
+	rsa_capi_idx = RSA_get_ex_new_index(0, NULL, NULL, NULL, /*capi_rsa_ex_free*/ 0);
+	ossl_meth = RSA_PKCS1_SSLeay();
+	capi_rsa_method.rsa_pub_enc = ossl_meth->rsa_pub_enc;
+	capi_rsa_method.rsa_pub_dec = ossl_meth->rsa_pub_dec;
+	capi_rsa_method.rsa_mod_exp = ossl_meth->rsa_mod_exp;
+	capi_rsa_method.bn_mod_exp = ossl_meth->bn_mod_exp;
+
+	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
+	{
+	HCRYPTPROV hprov;
+	HCRYPTKEY key;
+	};
+
+
+static int capi_bind_fn(ENGINE *e, const char *id)
+	{
+	if (id && strcmp(id, engine_capi_id))
+		return 0;
+	if (!ENGINE_set_id(e, engine_capi_id)
+		|| !ENGINE_set_name(e, engine_capi_name)
+		|| !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_load_privkey_function(e, capi_load_privkey)
+		|| !ENGINE_set_cmd_defns(e, capi_cmd_defns)
+		|| !ENGINE_set_ctrl_function(e, capi_ctrl))
+			return 0;
+	ERR_load_CAPI_strings();
+
+	return 1;
+
+	}
+
+
+IMPLEMENT_DYNAMIC_CHECK_FN()
+IMPLEMENT_DYNAMIC_BIND_FN(capi_bind_fn)
+
+static EVP_PKEY *capi_load_privkey(ENGINE *eng, const char *key_id,
+	UI_METHOD *ui_method, void *callback_data)
+	{
+	EVP_PKEY *ret = NULL;
+	CAPI_CTX *ctx;
+	CAPI_KEY *key;
+	unsigned char *pubkey = NULL;
+	DWORD len, i, rsa_modlen;
+	BLOBHEADER *bh;
+	RSAPUBKEY *rp;
+	unsigned char *rsa_modulus;
+	RSA *rkey = NULL;
+	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;
+
+	len = 0;
+	if (!CryptExportKey(key->key, 0, PUBLICKEYBLOB, 0, NULL, &len))
+		{
+		CAPIerr(CAPI_F_CAPI_LOAD_PRIVKEY, 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_LOAD_PRIVKEY, CAPI_R_PUBKEY_EXPORT_ERROR);
+		capi_addlasterror();
+		goto err;
+		}
+
+	bh = (BLOBHEADER *)pubkey;
+	rp = (RSAPUBKEY *)(bh + 1);
+	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;
+
+	for(i = 0; i < rsa_modlen / 2; i++)
+		{
+		unsigned char c;
+		c = rsa_modulus[i];
+		rsa_modulus[i] = rsa_modulus[rsa_modlen - i - 1];
+		rsa_modulus[rsa_modlen - i - 1] = c;
+		}
+
+	if (!BN_bin2bn(rsa_modulus, rsa_modlen, rkey->n))
+		goto memerr;
+
+	RSA_set_ex_data(rkey, rsa_capi_idx, key);
+
+	if (!(ret = EVP_PKEY_new()))
+		goto memerr;
+
+	EVP_PKEY_assign_RSA(ret, rkey);
+
+	err:
+	if (pubkey)
+		OPENSSL_free(pubkey);
+	if (!ret)
+		{
+		if (rkey)
+			RSA_free(rkey);
+		if (key)
+			capi_free_key(key);
+		}
+
+	return ret;
+
+memerr:
+	CAPIerr(CAPI_F_CAPI_LOAD_PRIVKEY, ERR_R_MALLOC_FAILURE);
+	goto err;
+
+	}
+
+/* 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];
+		sprintf(algstr, "%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(!CryptSignHash(hash, AT_KEYEXCHANGE, 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_DECRYPT, CAPI_R_CANT_GET_KEY);
+		return -1;
+		}
+
+	if(padding != RSA_PKCS1_PADDING)
+		{
+		char errstr[10];
+		sprintf(errstr, "%d", padding);
+		CAPIerr(CAPI_F_CAPI_RSA_DECRYPT, 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_DECRYPT, 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_DECRYPT, 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;
+	}
+
+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];
+	sprintf(errstr, "%lX", err);
+	ERR_add_error_data(2, "Error code= 0x", errstr);
+	}
+
+static char *wide_to_asc(LPWSTR wstr)
+	{
+	char *str;
+	if (!wstr)
+		return NULL;
+	str = OPENSSL_malloc(wcslen(wstr) + 1);
+	if (!str)
+		{
+		CAPIerr(CAPI_F_WIDE_TO_ASC, ERR_R_MALLOC_FAILURE);
+		return NULL;
+		}
+	sprintf(str, "%S", wstr);
+	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 (!CryptEnumProviders(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 (!CryptEnumProviders(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;
+	LPTSTR 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 (!CryptAcquireContext(&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();
+		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 = CertOpenSystemStore(0, 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;
+	key = OPENSSL_malloc(sizeof(CAPI_KEY));
+	CAPI_trace(ctx, "capi_get_key, contname=%s, provname=%s, type=%d\n", 
+															contname, provname, ptype);
+	if (!CryptAcquireContext(&key->hprov, contname, provname, ptype, 0))
+		{
+		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;
+		}
+	return key;
+
+	err:
+	OPENSSL_free(key);
+	return NULL;
+	}
+
+static CAPI_KEY *capi_get_cert_key(CAPI_CTX *ctx, PCCERT_CONTEXT cert)
+	{
+	CAPI_KEY *key;
+	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)
+		return 0;
+
+	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);
+	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->lookup_method = CAPI_LU_SUBSTR;
+	ctx->debug_level = 0;
+	ctx->debug_file = NULL;
+	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);
+	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