[thirdparty/strongswan.git] / src / libstrongswan / plugins / openssl / openssl_rsa_private_key.c

/*
 * Copyright (C) 2009 Martin Willi
 * Copyright (C) 2008 Tobias Brunner
 * Hochschule fuer Technik Rapperswil
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * for more details.
 */

#include "openssl_rsa_private_key.h"
#include "openssl_rsa_public_key.h"

#include <debug.h>

#include <openssl/evp.h>
#include <openssl/rsa.h>
#ifndef OPENSSL_NO_ENGINE
#include <openssl/engine.h>
#endif /* OPENSSL_NO_ENGINE */

/**
 *  Public exponent to use for key generation.
 */
#define PUBLIC_EXPONENT 0x10001

typedef struct private_openssl_rsa_private_key_t private_openssl_rsa_private_key_t;

/**
 * Private data of a openssl_rsa_private_key_t object.
 */
struct private_openssl_rsa_private_key_t {
	/**
	 * Public interface for this signer.
	 */
	openssl_rsa_private_key_t public;

	/**
	 * RSA object from OpenSSL
	 */
	RSA *rsa;

	/**
	 * TRUE if the key is from an OpenSSL ENGINE and might not be readable
	 */
	bool engine;

	/**
	 * reference count
	 */
	refcount_t ref;
};

/* implemented in rsa public key */
bool openssl_rsa_fingerprint(RSA *rsa, cred_encoding_type_t type, chunk_t *fp);

/**
 * Build an EMPSA PKCS1 signature described in PKCS#1
 */
static bool build_emsa_pkcs1_signature(private_openssl_rsa_private_key_t *this,
									   int type, chunk_t data, chunk_t *sig)
{
	bool success = FALSE;

	*sig = chunk_alloc(RSA_size(this->rsa));

	if (type == NID_undef)
	{
		if (RSA_private_encrypt(data.len, data.ptr, sig->ptr, this->rsa,
								RSA_PKCS1_PADDING) == sig->len)
		{
			success = TRUE;
		}
	}
	else
	{
		EVP_MD_CTX *ctx;
		EVP_PKEY *key;
		const EVP_MD *hasher;
		u_int len;

		hasher = EVP_get_digestbynid(type);
		if (!hasher)
		{
			return FALSE;
		}

		ctx = EVP_MD_CTX_create();
		key = EVP_PKEY_new();
		if (!ctx || !key)
		{
			goto error;
		}
		if (!EVP_PKEY_set1_RSA(key, this->rsa))
		{
			goto error;
		}
		if (!EVP_SignInit_ex(ctx, hasher, NULL))
		{
			goto error;
		}
		if (!EVP_SignUpdate(ctx, data.ptr, data.len))
		{
			goto error;
		}
		if (EVP_SignFinal(ctx, sig->ptr, &len, key))
		{
			success = TRUE;
		}

error:
		if (key)
		{
			EVP_PKEY_free(key);
		}
		if (ctx)
		{
			EVP_MD_CTX_destroy(ctx);
		}
	}
	if (!success)
	{
		free(sig->ptr);
	}
	return success;
}


METHOD(private_key_t, get_type, key_type_t,
	private_openssl_rsa_private_key_t *this)
{
	return KEY_RSA;
}

METHOD(private_key_t, sign, bool,
	private_openssl_rsa_private_key_t *this, signature_scheme_t scheme,
	chunk_t data, chunk_t *signature)
{
	switch (scheme)
	{
		case SIGN_RSA_EMSA_PKCS1_NULL:
			return build_emsa_pkcs1_signature(this, NID_undef, data, signature);
		case SIGN_RSA_EMSA_PKCS1_SHA1:
			return build_emsa_pkcs1_signature(this, NID_sha1, data, signature);
		case SIGN_RSA_EMSA_PKCS1_SHA224:
			return build_emsa_pkcs1_signature(this, NID_sha224, data, signature);
		case SIGN_RSA_EMSA_PKCS1_SHA256:
			return build_emsa_pkcs1_signature(this, NID_sha256, data, signature);
		case SIGN_RSA_EMSA_PKCS1_SHA384:
			return build_emsa_pkcs1_signature(this, NID_sha384, data, signature);
		case SIGN_RSA_EMSA_PKCS1_SHA512:
			return build_emsa_pkcs1_signature(this, NID_sha512, data, signature);
		case SIGN_RSA_EMSA_PKCS1_MD5:
			return build_emsa_pkcs1_signature(this, NID_md5, data, signature);
		default:
			DBG1(DBG_LIB, "signature scheme %N not supported in RSA",
				 signature_scheme_names, scheme);
			return FALSE;
	}
}

METHOD(private_key_t, decrypt, bool,
	private_openssl_rsa_private_key_t *this, encryption_scheme_t scheme,
	chunk_t crypto, chunk_t *plain)
{
	int padding, len;
	char *decrypted;

	switch (scheme)
	{
		case ENCRYPT_RSA_PKCS1:
			padding = RSA_PKCS1_PADDING;
			break;
		case ENCRYPT_RSA_OAEP_SHA1:
			padding = RSA_PKCS1_OAEP_PADDING;
			break;
		default:
			DBG1(DBG_LIB, "encryption scheme %N not supported via openssl",
				 encryption_scheme_names, scheme);
			return FALSE;
	}
	decrypted = malloc(RSA_size(this->rsa));
	len = RSA_private_decrypt(crypto.len, crypto.ptr, decrypted,
							  this->rsa, padding);
	if (len < 0)
	{
		DBG1(DBG_LIB, "RSA decryption failed");
		free(decrypted);
		return FALSE;
	}
	*plain = chunk_create(decrypted, len);
	return TRUE;
}

METHOD(private_key_t, get_keysize, int,
	private_openssl_rsa_private_key_t *this)
{
	return RSA_size(this->rsa) * 8;
}

METHOD(private_key_t, get_public_key, public_key_t*,
	private_openssl_rsa_private_key_t *this)
{
	chunk_t enc;
	public_key_t *key;
	u_char *p;

	enc = chunk_alloc(i2d_RSAPublicKey(this->rsa, NULL));
	p = enc.ptr;
	i2d_RSAPublicKey(this->rsa, &p);
	key = lib->creds->create(lib->creds, CRED_PUBLIC_KEY, KEY_RSA,
							 BUILD_BLOB_ASN1_DER, enc, BUILD_END);
	free(enc.ptr);
	return key;
}

METHOD(private_key_t, get_fingerprint, bool,
	private_openssl_rsa_private_key_t *this, cred_encoding_type_t type,
	chunk_t *fingerprint)
{
	return openssl_rsa_fingerprint(this->rsa, type, fingerprint);
}

METHOD(private_key_t, get_encoding, bool,
	private_openssl_rsa_private_key_t *this, cred_encoding_type_t type,
	chunk_t *encoding)
{
	u_char *p;

	if (this->engine)
	{
		return FALSE;
	}
	switch (type)
	{
		case PRIVKEY_ASN1_DER:
		case PRIVKEY_PEM:
		{
			bool success = TRUE;

			*encoding = chunk_alloc(i2d_RSAPrivateKey(this->rsa, NULL));
			p = encoding->ptr;
			i2d_RSAPrivateKey(this->rsa, &p);

			if (type == PRIVKEY_PEM)
			{
				chunk_t asn1_encoding = *encoding;

				success = lib->encoding->encode(lib->encoding, PRIVKEY_PEM,
								NULL, encoding, CRED_PART_RSA_PRIV_ASN1_DER,
								asn1_encoding, CRED_PART_END);
				chunk_clear(&asn1_encoding);
			}
			return success;
		}
		default:
			return FALSE;
	}
}

METHOD(private_key_t, get_ref, private_key_t*,
	private_openssl_rsa_private_key_t *this)
{
	ref_get(&this->ref);
	return &this->public.key;
}

METHOD(private_key_t, destroy, void,
	private_openssl_rsa_private_key_t *this)
{
	if (ref_put(&this->ref))
	{
		if (this->rsa)
		{
			lib->encoding->clear_cache(lib->encoding, this->rsa);
			RSA_free(this->rsa);
		}
		free(this);
	}
}

/**
 * Internal generic constructor
 */
static private_openssl_rsa_private_key_t *create_empty()
{
	private_openssl_rsa_private_key_t *this;

	INIT(this,
		.public = {
			.key = {
				.get_type = _get_type,
				.sign = _sign,
				.decrypt = _decrypt,
				.get_keysize = _get_keysize,
				.get_public_key = _get_public_key,
				.equals = private_key_equals,
				.belongs_to = private_key_belongs_to,
				.get_fingerprint = _get_fingerprint,
				.has_fingerprint = private_key_has_fingerprint,
				.get_encoding = _get_encoding,
				.get_ref = _get_ref,
				.destroy = _destroy,
			},
		},
		.ref = 1,
	);

	return this;
}

/**
 * See header.
 */
openssl_rsa_private_key_t *openssl_rsa_private_key_gen(key_type_t type,
													   va_list args)
{
	private_openssl_rsa_private_key_t *this;
	u_int key_size = 0;
	RSA *rsa = NULL;
	BIGNUM *e = NULL;

	while (TRUE)
	{
		switch (va_arg(args, builder_part_t))
		{
			case BUILD_KEY_SIZE:
				key_size = va_arg(args, u_int);
				continue;
			case BUILD_END:
				break;
			default:
				return NULL;
		}
		break;
	}
	if (!key_size)
	{
		return NULL;
	}
	e = BN_new();
	if (!e || !BN_set_word(e, PUBLIC_EXPONENT))
	{
		goto error;
	}
	rsa = RSA_new();
	if (!rsa || !RSA_generate_key_ex(rsa, key_size, e, NULL))
	{
		goto error;
	}
	this = create_empty();
	this->rsa = rsa;
	BN_free(e);
	return &this->public;

error:
	if (e)
	{
		BN_free(e);
	}
	if (rsa)
	{
		RSA_free(rsa);
	}
	return NULL;
}

/**
 * See header
 */
openssl_rsa_private_key_t *openssl_rsa_private_key_load(key_type_t type,
														va_list args)
{
	private_openssl_rsa_private_key_t *this;
	chunk_t blob, n, e, d, p, q, exp1, exp2, coeff;

	blob = n = e = d = p = q = exp1 = exp2 = coeff = chunk_empty;
	while (TRUE)
	{
		switch (va_arg(args, builder_part_t))
		{
			case BUILD_BLOB_ASN1_DER:
				blob = va_arg(args, chunk_t);
				continue;
			case BUILD_RSA_MODULUS:
				n = va_arg(args, chunk_t);
				continue;
			case BUILD_RSA_PUB_EXP:
				e = va_arg(args, chunk_t);
				continue;
			case BUILD_RSA_PRIV_EXP:
				d = va_arg(args, chunk_t);
				continue;
			case BUILD_RSA_PRIME1:
				p = va_arg(args, chunk_t);
				continue;
			case BUILD_RSA_PRIME2:
				q = va_arg(args, chunk_t);
				continue;
			case BUILD_RSA_EXP1:
				exp1 = va_arg(args, chunk_t);
				continue;
			case BUILD_RSA_EXP2:
				exp2 = va_arg(args, chunk_t);
				continue;
			case BUILD_RSA_COEFF:
				coeff = va_arg(args, chunk_t);
				continue;
			case BUILD_END:
				break;
			default:
				return NULL;
		}
		break;
	}

	this = create_empty();
	if (blob.ptr)
	{
		this->rsa = d2i_RSAPrivateKey(NULL, (const u_char**)&blob.ptr, blob.len);
		if (this->rsa && RSA_check_key(this->rsa))
		{
			return &this->public;
		}
	}
	else if (n.ptr && e.ptr && d.ptr && p.ptr && q.ptr && coeff.ptr)
	{
		this->rsa = RSA_new();
		this->rsa->n = BN_bin2bn((const u_char*)n.ptr, n.len, NULL);
		this->rsa->e = BN_bin2bn((const u_char*)e.ptr, e.len, NULL);
		this->rsa->d = BN_bin2bn((const u_char*)d.ptr, d.len, NULL);
		this->rsa->p = BN_bin2bn((const u_char*)p.ptr, p.len, NULL);
		this->rsa->q = BN_bin2bn((const u_char*)q.ptr, q.len, NULL);
		if (exp1.ptr)
		{
			this->rsa->dmp1 = BN_bin2bn((const u_char*)exp1.ptr, exp1.len, NULL);
		}
		if (exp2.ptr)
		{
			this->rsa->dmq1 = BN_bin2bn((const u_char*)exp2.ptr, exp2.len, NULL);
		}
		this->rsa->iqmp = BN_bin2bn((const u_char*)coeff.ptr, coeff.len, NULL);
		if (RSA_check_key(this->rsa))
		{
			return &this->public;
		}
	}
	destroy(this);
	return NULL;
}

/**
 * Login to engine with a PIN specified for a keyid
 */
static bool login(ENGINE *engine, chunk_t keyid)
{
	enumerator_t *enumerator;
	shared_key_t *shared;
	identification_t *id;
	chunk_t key;
	char pin[64];
	bool found = FALSE, success = FALSE;

	id = identification_create_from_encoding(ID_KEY_ID, keyid);
	enumerator = lib->credmgr->create_shared_enumerator(lib->credmgr,
														SHARED_PIN, id, NULL);
	while (enumerator->enumerate(enumerator, &shared, NULL, NULL))
	{
		found = TRUE;
		key = shared->get_key(shared);
		if (snprintf(pin, sizeof(pin), "%.*s", key.len, key.ptr) >= sizeof(pin))
		{
			continue;
		}
		if (ENGINE_ctrl_cmd_string(engine, "PIN", pin, 0))
		{
			success = TRUE;
			break;
		}
		else
		{
			DBG1(DBG_CFG, "setting PIN on engine failed");
		}
	}
	enumerator->destroy(enumerator);
	id->destroy(id);
	if (!found)
	{
		DBG1(DBG_CFG, "no PIN found for %#B", &keyid);
	}
	return success;
}

/**
 * See header.
 */
openssl_rsa_private_key_t *openssl_rsa_private_key_connect(key_type_t type,
														   va_list args)
{
#ifndef OPENSSL_NO_ENGINE
	private_openssl_rsa_private_key_t *this;
	char *engine_id = NULL;
	char keyname[64];
	chunk_t keyid = chunk_empty;;
	EVP_PKEY *key;
	ENGINE *engine;
	int slot = -1;

	while (TRUE)
	{
		switch (va_arg(args, builder_part_t))
		{
			case BUILD_PKCS11_KEYID:
				keyid = va_arg(args, chunk_t);
				continue;
			case BUILD_PKCS11_SLOT:
				slot = va_arg(args, int);
				continue;
			case BUILD_PKCS11_MODULE:
				engine_id = va_arg(args, char*);
				continue;
			case BUILD_END:
				break;
			default:
				return NULL;
		}
		break;
	}
	if (!keyid.len || keyid.len > 40)
	{
		return NULL;
	}

	memset(keyname, 0, sizeof(keyname));
	if (slot != -1)
	{
		snprintf(keyname, sizeof(keyname), "%d:", slot);
	}
	if (sizeof(keyname) - strlen(keyname) <= keyid.len * 4 / 3 + 1)
	{
		return NULL;
	}
	chunk_to_hex(keyid, keyname + strlen(keyname), FALSE);

	if (!engine_id)
	{
		engine_id = lib->settings->alloc_str(lib->settings,
						"libstrongswan.plugins.openssl.engine_id", "pkcs11");
	}
	engine = ENGINE_by_id(engine_id);
	if (!engine)
	{
		DBG2(DBG_LIB, "engine '%s' is not available", engine_id);
		goto engine_failed;
	}
	if (!ENGINE_init(engine))
	{
		DBG1(DBG_LIB, "failed to initialize engine '%s'", engine_id);
		goto engine_failed;
	}
	if (!login(engine, keyid))
	{
		DBG1(DBG_LIB, "login to engine '%s' failed", engine_id);
		goto engine_failed;
	}
	key = ENGINE_load_private_key(engine, keyname, NULL, NULL);
	if (!key)
	{
		DBG1(DBG_LIB, "failed to load private key with ID '%s' from "
			 "engine '%s'", keyname, engine_id);
		goto engine_failed;
	}
	ENGINE_free(engine);
	free(engine_id);

	this = create_empty();
	this->rsa = EVP_PKEY_get1_RSA(key);
	this->engine = TRUE;
	if (!this->rsa)
	{
		destroy(this);
		return NULL;
	}

	return &this->public;
#else /* OPENSSL_NO_ENGINE */
	return NULL;
#endif /* OPENSSL_NO_ENGINE */
engine_failed:
	if (engine)
	{
		ENGINE_free(engine);
	}
	free(engine_id);
	return NULL;
}
Commit	Line	Data
84770ded	1	/*
e35c3e2a	2	* Copyright (C) 2009 Martin Willi
84770ded TB	3	* Copyright (C) 2008 Tobias Brunner
	4	* Hochschule fuer Technik Rapperswil
	5	*
	6	* This program is free software; you can redistribute it and/or modify it
	7	* under the terms of the GNU General Public License as published by the
	8	* Free Software Foundation; either version 2 of the License, or (at your
	9	* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
	10	*
	11	* This program is distributed in the hope that it will be useful, but
	12	* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
	13	* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	14	* for more details.
84770ded TB	15	*/
	16
	17	#include "openssl_rsa_private_key.h"
	18	#include "openssl_rsa_public_key.h"
	19
	20	#include <debug.h>
	21
	22	#include <openssl/evp.h>
	23	#include <openssl/rsa.h>
1e3d66f8	24	#ifndef OPENSSL_NO_ENGINE
83c42156	25	#include <openssl/engine.h>
1e3d66f8	26	#endif /* OPENSSL_NO_ENGINE */
84770ded TB	27
	28	/**
	29	* Public exponent to use for key generation.
	30	*/
	31	#define PUBLIC_EXPONENT 0x10001
	32
	33	typedef struct private_openssl_rsa_private_key_t private_openssl_rsa_private_key_t;
	34
	35	/**
	36	* Private data of a openssl_rsa_private_key_t object.
	37	*/
	38	struct private_openssl_rsa_private_key_t {
	39	/**
	40	* Public interface for this signer.
	41	*/
	42	openssl_rsa_private_key_t public;
7daf5226	43
84770ded TB	44	/**
	45	* RSA object from OpenSSL
	46	*/
	47	RSA *rsa;
7daf5226	48
83c42156 TB	49	/**
	50	* TRUE if the key is from an OpenSSL ENGINE and might not be readable
	51	*/
	52	bool engine;
7daf5226	53
84770ded TB	54	/**
	55	* reference count
	56	*/
e35c3e2a	57	refcount_t ref;
84770ded TB	58	};
84770ded TB	59
b12c6d16	60	/* implemented in rsa public key */
da9724e6	61	bool openssl_rsa_fingerprint(RSA rsa, cred_encoding_type_t type, chunk_t fp);
b12c6d16	62
84770ded TB	63	/**
	64	* Build an EMPSA PKCS1 signature described in PKCS#1
	65	*/
	66	static bool build_emsa_pkcs1_signature(private_openssl_rsa_private_key_t *this,
dfa5fb03	67	int type, chunk_t data, chunk_t *sig)
84770ded TB	68	{
84770ded TB	69	bool success = FALSE;
dfa5fb03 AS	70
	71	*sig = chunk_alloc(RSA_size(this->rsa));
	72
	73	if (type == NID_undef)
84770ded	74	{
dfa5fb03 AS	75	if (RSA_private_encrypt(data.len, data.ptr, sig->ptr, this->rsa,
	76	RSA_PKCS1_PADDING) == sig->len)
	77	{
	78	success = TRUE;
	79	}
dcbea444 MW	80	}
	81	else
	82	{
dfa5fb03 AS	83	EVP_MD_CTX *ctx;
	84	EVP_PKEY *key;
	85	const EVP_MD *hasher;
942127a6	86	u_int len;
7daf5226	87
dfa5fb03 AS	88	hasher = EVP_get_digestbynid(type);
	89	if (!hasher)
	90	{
	91	return FALSE;
	92	}
7daf5226	93
dfa5fb03 AS	94	ctx = EVP_MD_CTX_create();
	95	key = EVP_PKEY_new();
	96	if (!ctx \|\| !key)
	97	{
	98	goto error;
	99	}
	100	if (!EVP_PKEY_set1_RSA(key, this->rsa))
	101	{
	102	goto error;
	103	}
	104	if (!EVP_SignInit_ex(ctx, hasher, NULL))
	105	{
	106	goto error;
	107	}
	108	if (!EVP_SignUpdate(ctx, data.ptr, data.len))
	109	{
	110	goto error;
	111	}
942127a6	112	if (EVP_SignFinal(ctx, sig->ptr, &len, key))
dfa5fb03 AS	113	{
	114	success = TRUE;
	115	}
7daf5226	116
84770ded	117	error:
dfa5fb03 AS	118	if (key)
	119	{
	120	EVP_PKEY_free(key);
	121	}
	122	if (ctx)
	123	{
	124	EVP_MD_CTX_destroy(ctx);
	125	}
84770ded	126	}
dfa5fb03	127	if (!success)
84770ded	128	{
dfa5fb03	129	free(sig->ptr);
84770ded TB	130	}
	131	return success;
	132	}
	133
57202484 MW	134
	135	METHOD(private_key_t, get_type, key_type_t,
	136	private_openssl_rsa_private_key_t *this)
84770ded TB	137	{
	138	return KEY_RSA;
	139	}
	140
57202484 MW	141	METHOD(private_key_t, sign, bool,
	142	private_openssl_rsa_private_key_t *this, signature_scheme_t scheme,
	143	chunk_t data, chunk_t *signature)
84770ded TB	144	{
	145	switch (scheme)
	146	{
dfa5fb03 AS	147	case SIGN_RSA_EMSA_PKCS1_NULL:
dfa5fb03 AS	148	return build_emsa_pkcs1_signature(this, NID_undef, data, signature);
84770ded TB	149	case SIGN_RSA_EMSA_PKCS1_SHA1:
84770ded TB	150	return build_emsa_pkcs1_signature(this, NID_sha1, data, signature);
b6f739c1 AS	151	case SIGN_RSA_EMSA_PKCS1_SHA224:
b6f739c1 AS	152	return build_emsa_pkcs1_signature(this, NID_sha224, data, signature);
84770ded TB	153	case SIGN_RSA_EMSA_PKCS1_SHA256:
	154	return build_emsa_pkcs1_signature(this, NID_sha256, data, signature);
	155	case SIGN_RSA_EMSA_PKCS1_SHA384:
	156	return build_emsa_pkcs1_signature(this, NID_sha384, data, signature);
	157	case SIGN_RSA_EMSA_PKCS1_SHA512:
	158	return build_emsa_pkcs1_signature(this, NID_sha512, data, signature);
	159	case SIGN_RSA_EMSA_PKCS1_MD5:
	160	return build_emsa_pkcs1_signature(this, NID_md5, data, signature);
	161	default:
8b0e0910	162	DBG1(DBG_LIB, "signature scheme %N not supported in RSA",
84770ded TB	163	signature_scheme_names, scheme);
	164	return FALSE;
	165	}
	166	}
	167
57202484	168	METHOD(private_key_t, decrypt, bool,
33ddaaab MW	169	private_openssl_rsa_private_key_t *this, encryption_scheme_t scheme,
33ddaaab MW	170	chunk_t crypto, chunk_t *plain)
84770ded	171	{
d775af9d MW	172	int padding, len;
	173	char *decrypted;
	174
	175	switch (scheme)
	176	{
	177	case ENCRYPT_RSA_PKCS1:
	178	padding = RSA_PKCS1_PADDING;
	179	break;
	180	case ENCRYPT_RSA_OAEP_SHA1:
	181	padding = RSA_PKCS1_OAEP_PADDING;
	182	break;
	183	default:
	184	DBG1(DBG_LIB, "encryption scheme %N not supported via openssl",
	185	encryption_scheme_names, scheme);
	186	return FALSE;
	187	}
	188	decrypted = malloc(RSA_size(this->rsa));
	189	len = RSA_private_decrypt(crypto.len, crypto.ptr, decrypted,
	190	this->rsa, padding);
	191	if (len < 0)
	192	{
	193	DBG1(DBG_LIB, "RSA decryption failed");
	194	free(decrypted);
	195	return FALSE;
	196	}
	197	*plain = chunk_create(decrypted, len);
	198	return TRUE;
84770ded TB	199	}
84770ded TB	200
a944d209	201	METHOD(private_key_t, get_keysize, int,
57202484	202	private_openssl_rsa_private_key_t *this)
84770ded	203	{
a944d209	204	return RSA_size(this->rsa) * 8;
84770ded TB	205	}
84770ded TB	206
57202484 MW	207	METHOD(private_key_t, get_public_key, public_key_t*,
57202484 MW	208	private_openssl_rsa_private_key_t *this)
8b799d55	209	{
e35c3e2a MW	210	chunk_t enc;
	211	public_key_t *key;
	212	u_char *p;
7daf5226	213
e35c3e2a MW	214	enc = chunk_alloc(i2d_RSAPublicKey(this->rsa, NULL));
	215	p = enc.ptr;
	216	i2d_RSAPublicKey(this->rsa, &p);
	217	key = lib->creds->create(lib->creds, CRED_PUBLIC_KEY, KEY_RSA,
	218	BUILD_BLOB_ASN1_DER, enc, BUILD_END);
	219	free(enc.ptr);
	220	return key;
8b799d55 AS	221	}
8b799d55 AS	222
57202484 MW	223	METHOD(private_key_t, get_fingerprint, bool,
	224	private_openssl_rsa_private_key_t *this, cred_encoding_type_t type,
	225	chunk_t *fingerprint)
84770ded	226	{
b12c6d16	227	return openssl_rsa_fingerprint(this->rsa, type, fingerprint);
84770ded TB	228	}
84770ded TB	229
57202484 MW	230	METHOD(private_key_t, get_encoding, bool,
	231	private_openssl_rsa_private_key_t *this, cred_encoding_type_t type,
	232	chunk_t *encoding)
84770ded	233	{
e35c3e2a	234	u_char *p;
7daf5226	235
a0b85045	236	if (this->engine)
83c42156	237	{
e35c3e2a	238	return FALSE;
83c42156	239	}
b12c6d16 MW	240	switch (type)
b12c6d16 MW	241	{
da9724e6 MW	242	case PRIVKEY_ASN1_DER:
da9724e6 MW	243	case PRIVKEY_PEM:
b12c6d16	244	{
29cf15a9 AS	245	bool success = TRUE;
29cf15a9 AS	246
b12c6d16 MW	247	*encoding = chunk_alloc(i2d_RSAPrivateKey(this->rsa, NULL));
	248	p = encoding->ptr;
	249	i2d_RSAPrivateKey(this->rsa, &p);
29cf15a9	250
da9724e6	251	if (type == PRIVKEY_PEM)
29cf15a9 AS	252	{
	253	chunk_t asn1_encoding = *encoding;
	254
da9724e6 MW	255	success = lib->encoding->encode(lib->encoding, PRIVKEY_PEM,
	256	NULL, encoding, CRED_PART_RSA_PRIV_ASN1_DER,
	257	asn1_encoding, CRED_PART_END);
29cf15a9	258	chunk_clear(&asn1_encoding);
0a4dc787	259	}
29cf15a9	260	return success;
b12c6d16 MW	261	}
	262	default:
	263	return FALSE;
	264	}
84770ded TB	265	}
84770ded TB	266
57202484 MW	267	METHOD(private_key_t, get_ref, private_key_t*,
57202484 MW	268	private_openssl_rsa_private_key_t *this)
84770ded TB	269	{
84770ded TB	270	ref_get(&this->ref);
57202484	271	return &this->public.key;
84770ded TB	272	}
84770ded TB	273
57202484 MW	274	METHOD(private_key_t, destroy, void,
57202484 MW	275	private_openssl_rsa_private_key_t *this)
84770ded TB	276	{
	277	if (ref_put(&this->ref))
	278	{
	279	if (this->rsa)
	280	{
b12c6d16	281	lib->encoding->clear_cache(lib->encoding, this->rsa);
84770ded TB	282	RSA_free(this->rsa);
84770ded TB	283	}
84770ded TB	284	free(this);
	285	}
	286	}
	287
	288	/**
	289	* Internal generic constructor
	290	*/
57202484	291	static private_openssl_rsa_private_key_t *create_empty()
84770ded	292	{
57202484 MW	293	private_openssl_rsa_private_key_t *this;
	294
	295	INIT(this,
ba31fe1f MW	296	.public = {
	297	.key = {
	298	.get_type = _get_type,
	299	.sign = _sign,
	300	.decrypt = _decrypt,
	301	.get_keysize = _get_keysize,
	302	.get_public_key = _get_public_key,
	303	.equals = private_key_equals,
	304	.belongs_to = private_key_belongs_to,
	305	.get_fingerprint = _get_fingerprint,
	306	.has_fingerprint = private_key_has_fingerprint,
	307	.get_encoding = _get_encoding,
	308	.get_ref = _get_ref,
	309	.destroy = _destroy,
	310	},
57202484 MW	311	},
	312	.ref = 1,
	313	);
7daf5226	314
84770ded TB	315	return this;
	316	}
	317
	318	/**
30c06407	319	* See header.
84770ded	320	*/
30c06407 MW	321	openssl_rsa_private_key_t *openssl_rsa_private_key_gen(key_type_t type,
30c06407 MW	322	va_list args)
84770ded	323	{
30c06407 MW	324	private_openssl_rsa_private_key_t *this;
30c06407 MW	325	u_int key_size = 0;
d14203b0 TB	326	RSA *rsa = NULL;
d14203b0 TB	327	BIGNUM *e = NULL;
7daf5226	328
30c06407 MW	329	while (TRUE)
	330	{
	331	switch (va_arg(args, builder_part_t))
	332	{
	333	case BUILD_KEY_SIZE:
	334	key_size = va_arg(args, u_int);
	335	continue;
	336	case BUILD_END:
	337	break;
	338	default:
	339	return NULL;
	340	}
	341	break;
	342	}
	343	if (!key_size)
	344	{
	345	return NULL;
	346	}
d14203b0 TB	347	e = BN_new();
	348	if (!e \|\| !BN_set_word(e, PUBLIC_EXPONENT))
	349	{
	350	goto error;
	351	}
	352	rsa = RSA_new();
	353	if (!rsa \|\| !RSA_generate_key_ex(rsa, key_size, e, NULL))
	354	{
	355	goto error;
	356	}
30c06407	357	this = create_empty();
d14203b0 TB	358	this->rsa = rsa;
d14203b0 TB	359	BN_free(e);
84770ded	360	return &this->public;
d14203b0 TB	361
	362	error:
	363	if (e)
	364	{
	365	BN_free(e);
	366	}
	367	if (rsa)
	368	{
	369	RSA_free(rsa);
	370	}
	371	return NULL;
84770ded TB	372	}
	373
	374	/**
30c06407	375	* See header
84770ded	376	*/
30c06407 MW	377	openssl_rsa_private_key_t *openssl_rsa_private_key_load(key_type_t type,
30c06407 MW	378	va_list args)
84770ded	379	{
30c06407	380	private_openssl_rsa_private_key_t *this;
b9fbd665	381	chunk_t blob, n, e, d, p, q, exp1, exp2, coeff;
7daf5226	382
b9fbd665	383	blob = n = e = d = p = q = exp1 = exp2 = coeff = chunk_empty;
30c06407 MW	384	while (TRUE)
	385	{
	386	switch (va_arg(args, builder_part_t))
	387	{
	388	case BUILD_BLOB_ASN1_DER:
	389	blob = va_arg(args, chunk_t);
	390	continue;
b9fbd665 MW	391	case BUILD_RSA_MODULUS:
	392	n = va_arg(args, chunk_t);
	393	continue;
	394	case BUILD_RSA_PUB_EXP:
	395	e = va_arg(args, chunk_t);
	396	continue;
	397	case BUILD_RSA_PRIV_EXP:
	398	d = va_arg(args, chunk_t);
	399	continue;
	400	case BUILD_RSA_PRIME1:
	401	p = va_arg(args, chunk_t);
	402	continue;
	403	case BUILD_RSA_PRIME2:
	404	q = va_arg(args, chunk_t);
	405	continue;
	406	case BUILD_RSA_EXP1:
	407	exp1 = va_arg(args, chunk_t);
	408	continue;
	409	case BUILD_RSA_EXP2:
	410	exp2 = va_arg(args, chunk_t);
	411	continue;
	412	case BUILD_RSA_COEFF:
	413	coeff = va_arg(args, chunk_t);
	414	continue;
30c06407 MW	415	case BUILD_END:
	416	break;
	417	default:
	418	return NULL;
	419	}
	420	break;
	421	}
	422
	423	this = create_empty();
b9fbd665	424	if (blob.ptr)
84770ded	425	{
b9fbd665 MW	426	this->rsa = d2i_RSAPrivateKey(NULL, (const u_char**)&blob.ptr, blob.len);
	427	if (this->rsa && RSA_check_key(this->rsa))
	428	{
	429	return &this->public;
	430	}
84770ded	431	}
012f62a8	432	else if (n.ptr && e.ptr && d.ptr && p.ptr && q.ptr && coeff.ptr)
84770ded	433	{
b9fbd665 MW	434	this->rsa = RSA_new();
	435	this->rsa->n = BN_bin2bn((const u_char*)n.ptr, n.len, NULL);
	436	this->rsa->e = BN_bin2bn((const u_char*)e.ptr, e.len, NULL);
	437	this->rsa->d = BN_bin2bn((const u_char*)d.ptr, d.len, NULL);
	438	this->rsa->p = BN_bin2bn((const u_char*)p.ptr, p.len, NULL);
	439	this->rsa->q = BN_bin2bn((const u_char*)q.ptr, q.len, NULL);
012f62a8 MW	440	if (exp1.ptr)
	441	{
	442	this->rsa->dmp1 = BN_bin2bn((const u_char*)exp1.ptr, exp1.len, NULL);
	443	}
	444	if (exp2.ptr)
	445	{
	446	this->rsa->dmq1 = BN_bin2bn((const u_char*)exp2.ptr, exp2.len, NULL);
	447	}
b9fbd665 MW	448	this->rsa->iqmp = BN_bin2bn((const u_char*)coeff.ptr, coeff.len, NULL);
	449	if (RSA_check_key(this->rsa))
	450	{
	451	return &this->public;
	452	}
84770ded	453	}
b9fbd665 MW	454	destroy(this);
b9fbd665 MW	455	return NULL;
84770ded TB	456	}
84770ded TB	457
0556667d MW	458	/**
	459	* Login to engine with a PIN specified for a keyid
	460	*/
	461	static bool login(ENGINE *engine, chunk_t keyid)
	462	{
	463	enumerator_t *enumerator;
	464	shared_key_t *shared;
	465	identification_t *id;
	466	chunk_t key;
	467	char pin[64];
	468	bool found = FALSE, success = FALSE;
	469
	470	id = identification_create_from_encoding(ID_KEY_ID, keyid);
	471	enumerator = lib->credmgr->create_shared_enumerator(lib->credmgr,
	472	SHARED_PIN, id, NULL);
	473	while (enumerator->enumerate(enumerator, &shared, NULL, NULL))
	474	{
	475	found = TRUE;
	476	key = shared->get_key(shared);
	477	if (snprintf(pin, sizeof(pin), "%.*s", key.len, key.ptr) >= sizeof(pin))
	478	{
	479	continue;
	480	}
	481	if (ENGINE_ctrl_cmd_string(engine, "PIN", pin, 0))
	482	{
	483	success = TRUE;
	484	break;
	485	}
	486	else
	487	{
	488	DBG1(DBG_CFG, "setting PIN on engine failed");
	489	}
	490	}
	491	enumerator->destroy(enumerator);
	492	id->destroy(id);
	493	if (!found)
	494	{
	495	DBG1(DBG_CFG, "no PIN found for %#B", &keyid);
	496	}
	497	return success;
	498	}
	499
83c42156	500	/**
30c06407	501	* See header.
83c42156	502	*/
30c06407 MW	503	openssl_rsa_private_key_t *openssl_rsa_private_key_connect(key_type_t type,
30c06407 MW	504	va_list args)
83c42156	505	{
1e3d66f8	506	#ifndef OPENSSL_NO_ENGINE
30c06407	507	private_openssl_rsa_private_key_t *this;
0b8b6640	508	char *engine_id = NULL;
0556667d MW	509	char keyname[64];
0556667d MW	510	chunk_t keyid = chunk_empty;;
83c42156	511	EVP_PKEY *key;
30c06407	512	ENGINE *engine;
3479c279	513	int slot = -1;
30c06407 MW	514
	515	while (TRUE)
	516	{
	517	switch (va_arg(args, builder_part_t))
	518	{
3479c279	519	case BUILD_PKCS11_KEYID:
0b8b6640	520	keyid = va_arg(args, chunk_t);
30c06407	521	continue;
3479c279 MW	522	case BUILD_PKCS11_SLOT:
	523	slot = va_arg(args, int);
	524	continue;
	525	case BUILD_PKCS11_MODULE:
	526	engine_id = va_arg(args, char*);
	527	continue;
30c06407 MW	528	case BUILD_END:
	529	break;
	530	default:
	531	return NULL;
	532	}
	533	break;
	534	}
0556667d	535	if (!keyid.len \|\| keyid.len > 40)
30c06407 MW	536	{
	537	return NULL;
	538	}
7daf5226	539
0b8b6640 MW	540	memset(keyname, 0, sizeof(keyname));
0b8b6640 MW	541	if (slot != -1)
3479c279	542	{
0b8b6640	543	snprintf(keyname, sizeof(keyname), "%d:", slot);
3479c279	544	}
0b8b6640	545	if (sizeof(keyname) - strlen(keyname) <= keyid.len * 4 / 3 + 1)
3479c279	546	{
0b8b6640	547	return NULL;
3479c279	548	}
0b8b6640 MW	549	chunk_to_hex(keyid, keyname + strlen(keyname), FALSE);
0b8b6640 MW	550
3479c279 MW	551	if (!engine_id)
3479c279 MW	552	{
3e2419eb	553	engine_id = lib->settings->alloc_str(lib->settings,
9f4b02e3	554	"libstrongswan.plugins.openssl.engine_id", "pkcs11");
3479c279	555	}
30c06407	556	engine = ENGINE_by_id(engine_id);
83c42156 TB	557	if (!engine)
83c42156 TB	558	{
0b8b6640	559	DBG2(DBG_LIB, "engine '%s' is not available", engine_id);
3e2419eb	560	goto engine_failed;
83c42156	561	}
83c42156 TB	562	if (!ENGINE_init(engine))
83c42156 TB	563	{
8b0e0910	564	DBG1(DBG_LIB, "failed to initialize engine '%s'", engine_id);
3e2419eb	565	goto engine_failed;
83c42156	566	}
0556667d	567	if (!login(engine, keyid))
83c42156	568	{
0556667d	569	DBG1(DBG_LIB, "login to engine '%s' failed", engine_id);
3e2419eb	570	goto engine_failed;
83c42156	571	}
3479c279	572	key = ENGINE_load_private_key(engine, keyname, NULL, NULL);
83c42156 TB	573	if (!key)
83c42156 TB	574	{
8b0e0910	575	DBG1(DBG_LIB, "failed to load private key with ID '%s' from "
3479c279	576	"engine '%s'", keyname, engine_id);
3e2419eb	577	goto engine_failed;
83c42156 TB	578	}
83c42156 TB	579	ENGINE_free(engine);
3e2419eb	580	free(engine_id);
7daf5226	581
e35c3e2a	582	this = create_empty();
83c42156 TB	583	this->rsa = EVP_PKEY_get1_RSA(key);
83c42156 TB	584	this->engine = TRUE;
3479c279 MW	585	if (!this->rsa)
	586	{
	587	destroy(this);
	588	return NULL;
	589	}
7daf5226	590
84770ded	591	return &this->public;
1e3d66f8 TB	592	#else /* OPENSSL_NO_ENGINE */
	593	return NULL;
	594	#endif /* OPENSSL_NO_ENGINE */
3e2419eb MW	595	engine_failed:
	596	if (engine)
	597	{
	598	ENGINE_free(engine);
	599	}
	600	free(engine_id);
	601	return NULL;
84770ded TB	602	}
84770ded TB	603