comment change

2 files changed, 2 insertions, 2 deletions

diff --git a/pwmanager/pwmanager/libgcryptif.cpp b/pwmanager/pwmanager/libgcryptif.cpp
index 8175510..eafd318 100644
--- a/pwmanager/pwmanager/libgcryptif.cpp
+++ b/pwmanager/pwmanager/libgcryptif.cpp
@@ -1,449 +1,449 @@
 /***************************************************************************
  *                                                                         *
  *   copyright (C) 2004 by Michael Buesch                                  *
  *   email: mbuesch@freenet.de                                             *
  *                                                                         *
  *   hashPassphrase() is derived from GnuPG and is                         *
  *   Copyright (C) 1998, 1999, 2000, 2001, 2003                            *
  *   Free Software Foundation, Inc.                                        *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License version 2        *
  *   as published by the Free Software Foundation.                         *
  *                                                                         *
  ***************************************************************************/
 
 /***************************************************************************
  * copyright (C) 2004 by Ulf Schenk
- * This file is originaly based on version 2.0 of pwmanager
+ * This file is originaly based on version 1.1 of pwmanager
  * and was modified to run on embedded devices that run microkde
  *
  * $Id$
  **************************************************************************/  
 
 #include "libgcryptif.h"
 
 #ifdef CONFIG_PWMANAGER_GCRY
 
 #include "pwmdoc.h"
 #include "randomizer.h"
 
 #include <gcrypt.h>
 
 #ifdef PWM_EMBEDDED
 #include <pwmprefs.h>
 #endif
 
 
 PwMerror LibGCryptIf::encrypt(unsigned char **outBuf,
 			      size_t *outBufLen,
 			      unsigned char *inBuf,
 			      size_t inBufLen,
 			      const unsigned char *key,
 			      size_t keylen,
 			      char _algo)
 {
 	PwMerror ret = e_success;
 	gcry_error_t err;
 	gcry_cipher_hd_t handle;
 	size_t blklen;
 	size_t unpaddedLen = inBufLen;
 	size_t cipherKeylen;
 	unsigned char *hashedKey;
 	unsigned char salt[STRING2KEY_SALTLEN];
 	int algo = mapCipherId(_algo);
 
 	if (!inBufLen || !keylen)
 		return e_invalidArg;
 
 	// test if algo is ready for encryption
 	err = gcry_cipher_algo_info(algo,
 				    GCRYCTL_TEST_ALGO,
 				    0, 0);
 	if (err != GPG_ERR_NO_ERROR) {
 		printDebug(string("LibGCryptIf::doEncrypt(): GCRYCTL_TEST_ALGO failed: ")
 			   + gcry_strerror(err));
 		ret = e_cryptNotImpl;
 		goto out;
 	}
 	// get the algo block length
 	err = gcry_cipher_algo_info(algo,
 				    GCRYCTL_GET_BLKLEN,
 				    0,
 				    &blklen);
 	if (err != GPG_ERR_NO_ERROR) {
 		printDebug(string("LibGCryptIf::doEncrypt(): GCRYCTL_GET_BLKLEN failed: ")
 			   + gcry_strerror(err));
 		ret = e_cryptNotImpl;
 		goto out;
 	}
 	/* double check if we have enough space.
 	 * We have only 1024 extra bytes for padding and salt.
 	 */
 	BUG_ON(blklen > 1024 - STRING2KEY_SALTLEN);
 	// get the algo key length
 	err = gcry_cipher_algo_info(algo,
 				    GCRYCTL_GET_KEYLEN,
 				    0,
 				    &cipherKeylen);
 	if (err != GPG_ERR_NO_ERROR) {
 		printDebug(string("LibGCryptIf::doEncrypt(): GCRYCTL_GET_KEYLEN failed: ")
 			   + gcry_strerror(err));
 		ret = e_cryptNotImpl;
 		goto out;
 	}
 	// now open the algo and get a handle
 	err = gcry_cipher_open(&handle,
 			       algo,
 			       GCRY_CIPHER_MODE_CBC,
 			       0);
 	if (err != GPG_ERR_NO_ERROR) {
 		printDebug(string("LibGCryptIf::doEncrypt(): gcry_cipher_open() failed: ")
 			   + gcry_strerror(err));
 		ret = e_cryptNotImpl;
 		goto out;
 	}
 	// hash the "key" to a fixed size hash matching "cipherKeylen"
 	hashedKey = new unsigned char[cipherKeylen];
 	hashPassphrase(key, keylen, salt, hashedKey, cipherKeylen, true);
 	// so now set the hashed key
 	err = gcry_cipher_setkey(handle, hashedKey, cipherKeylen);
 	if (err != GPG_ERR_NO_ERROR) {
 		printDebug(string("LibGCryptIf::doEncrypt(): gcry_cipher_setkey() failed: ")
 			   + gcry_strerror(err));
 		ret = e_cryptNotImpl;
 		delete [] hashedKey;
 		goto out_close;
 	}
 	delete [] hashedKey;
 	/* allocate a buffer for the encrypted data.
 	 * The size of the buffer is the inBuf length, but blklen
 	 * aligned and plus the length of the salt, that is appended.
 	 */
 	*outBufLen = getBufLen(unpaddedLen, blklen) + STRING2KEY_SALTLEN;
 	*outBuf = new unsigned char[*outBufLen];
 	padData(inBuf, unpaddedLen, blklen);
 	// encrypt the padded data
 	err = gcry_cipher_encrypt(handle,
 				  *outBuf,
 				  *outBufLen - STRING2KEY_SALTLEN,
 				  inBuf,
 				  *outBufLen - STRING2KEY_SALTLEN);
 	if (err != GPG_ERR_NO_ERROR) {
 		printDebug(string("LibGCryptIf::doEncrypt(): gcry_cipher_encrypt() failed: ")
 			   + gcry_strerror(err));
 		ret = e_cryptNotImpl;
 		goto out_delete;
 	}
 	// append the salt to the encrypted data
 	memcpy(*outBuf + *outBufLen - STRING2KEY_SALTLEN, salt, STRING2KEY_SALTLEN);
 	goto out_close;
 out_delete:
 	delete [] *outBuf;
 out_close:
 	gcry_cipher_close(handle);
 out:
 	return ret;
 }
 
 PwMerror LibGCryptIf::decrypt(unsigned char **outBuf,
 			      size_t *outBufLen,
 			      const unsigned char *inBuf,
 			      size_t inBufLen,
 			      const unsigned char *key,
 			      size_t keylen,
 			      char _algo)
 {
 	PwMerror ret = e_success;
 	gcry_error_t err;
 	gcry_cipher_hd_t handle;
 	size_t cipherKeylen;
 	unsigned char *hashedKey;
 	unsigned char salt[STRING2KEY_SALTLEN];
 	int algo = mapCipherId(_algo);
 
 	if (!inBufLen || !keylen)
 		return e_invalidArg;
 
 	// test if algo is ready for encryption
 	err = gcry_cipher_algo_info(algo,
 				    GCRYCTL_TEST_ALGO,
 				    0, 0);
 	if (err != GPG_ERR_NO_ERROR) {
 		printDebug(string("LibGCryptIf::doDecrypt(): GCRYCTL_TEST_ALGO failed: ")
 			   + gcry_strerror(err));
 		ret = e_cryptNotImpl;
 		goto out;
 	}
 	// get algo key length
 	err = gcry_cipher_algo_info(algo,
 				    GCRYCTL_GET_KEYLEN,
 				    0,
 				    &cipherKeylen);
 	if (err != GPG_ERR_NO_ERROR) {
 		printDebug(string("LibGCryptIf::doDecrypt(): GCRYCTL_GET_KEYLEN failed: ")
 			   + gcry_strerror(err));
 		ret = e_cryptNotImpl;
 		goto out;
 	}
 	// extract the salt of the encrypted data buffer
 	memcpy(salt, inBuf + inBufLen - STRING2KEY_SALTLEN, STRING2KEY_SALTLEN);
 	// open the algo and get a handle
 	err = gcry_cipher_open(&handle,
 			       algo,
 			       GCRY_CIPHER_MODE_CBC,
 			       0);
 	if (err != GPG_ERR_NO_ERROR) {
 		printDebug(string("LibGCryptIf::doDecrypt(): gcry_cipher_open() failed: ")
 			   + gcry_strerror(err));
 		ret = e_cryptNotImpl;
 		goto out;
 	}
 	// hash the "key" to a fixed size hash matching "cipherKeylen"
 	hashedKey = new unsigned char[cipherKeylen];
 	hashPassphrase(key, keylen, salt, hashedKey, cipherKeylen, false);
 	// so now set the hashed key
 	err = gcry_cipher_setkey(handle, hashedKey, cipherKeylen);
 	if (err != GPG_ERR_NO_ERROR) {
 		printDebug(string("LibGCryptIf::doDecrypt(): gcry_cipher_setkey() failed: ")
 			   + gcry_strerror(err));
 		ret = e_cryptNotImpl;
 		delete [] hashedKey;
 		goto out_close;
 	}
 	delete [] hashedKey;
 	*outBufLen = inBufLen - STRING2KEY_SALTLEN;
 	*outBuf = new unsigned char[*outBufLen];
 	// decrypt the data
 	err = gcry_cipher_decrypt(handle,
 				  *outBuf,
 				  *outBufLen,
 				  inBuf,
 				  *outBufLen);
 	if (err != GPG_ERR_NO_ERROR) {
 		printDebug(string("LibGCryptIf::doEncrypt(): gcry_cipher_encrypt() failed: ")
 			   + gcry_strerror(err));
 		ret = e_cryptNotImpl;
 		goto out_delete;
 	}
 	// remove all random padding
 	unpadData(*outBuf, outBufLen);
 	goto out_close;
 out_delete:
 	delete [] *outBuf;
 out_close:
 	gcry_cipher_close(handle);
 out:
 	return ret;
 }
 
 PwMerror LibGCryptIf::hash(unsigned char **outBuf,
 			   size_t *outBufLen,
 			   const unsigned char *inBuf,
 			   size_t inBufLen,
 			   char _algo)
 {
 	PwMerror ret = e_success;
 	unsigned int hashLen;
 	int algo = mapHashId(_algo);
 
 	hashLen = gcry_md_get_algo_dlen(algo);
 	*outBufLen = hashLen;
 	*outBuf = new unsigned char[*outBufLen];
 	gcry_md_hash_buffer(algo,
 			    *outBuf,
 			    inBuf,
 			    inBufLen);
 	return ret;
 }
 
 unsigned int LibGCryptIf::hashLength(char _algo)
 {
 	unsigned int ret;
 	int algo = mapHashId(_algo);
 	ret = gcry_md_get_algo_dlen(algo);
 	return ret;
 }
 
 int LibGCryptIf::mapCipherId(char algo)
 {
 	switch (algo) {
 	case PWM_CRYPT_AES128:
 		return GCRY_CIPHER_AES;
 	case PWM_CRYPT_AES192:
 		return GCRY_CIPHER_AES192;
 	case PWM_CRYPT_AES256:
 		return GCRY_CIPHER_AES256;
 	case PWM_CRYPT_3DES:
 		return GCRY_CIPHER_3DES;
 	case PWM_CRYPT_TWOFISH:
 		return GCRY_CIPHER_TWOFISH;
 	case PWM_CRYPT_TWOFISH128:
 		return GCRY_CIPHER_TWOFISH128;
 	default:
 		BUG();
 	}
 	return GCRY_CIPHER_NONE;
 }
 
 int LibGCryptIf::mapHashId(char algo)
 {
 	switch (algo) {
 	case PWM_HASH_SHA1:
 		return GCRY_MD_SHA1;
 	case PWM_HASH_SHA256:
 		return GCRY_MD_SHA256;
 	case PWM_HASH_SHA384:
 		return GCRY_MD_SHA384;
 	case PWM_HASH_SHA512:
 		return GCRY_MD_SHA512;
 	case PWM_HASH_MD5:
 		return GCRY_MD_MD5;
 	case PWM_HASH_RMD160:
 		return GCRY_MD_RMD160;
 	case PWM_HASH_TIGER:
 		return GCRY_MD_TIGER;
 	default:
 		BUG();
 	}
 	return GCRY_MD_NONE;
 }
 
 bool LibGCryptIf::hashPassphrase(const unsigned char *pw,
 				 size_t pwlen,
 				 unsigned char *salt,
 				 unsigned char *key,
 				 size_t keylen,
 				 bool create)
 {
 	DEK dek;
 	STRING2KEY s2k;
 	bool ret;
 
 	dek.keylen = keylen;
 	s2k.mode = 1;
 	s2k.hash_algo = mapHashId(conf()->confGlobHashAlgo());
 	s2k.count = 0;
 	if (!create)
 		memcpy(s2k.salt, salt, STRING2KEY_SALTLEN);
 	ret = doHashPassphrase(&dek,
 			       pw,
 			       pwlen,
 			       &s2k,
 			       create);
 	if (!ret)
 		goto out;
 	memcpy(key, dek.key, dek.keylen);
 	if (create)
 		memcpy(salt, s2k.salt, STRING2KEY_SALTLEN);
 out:
 	return ret;
 }
 
 
 bool LibGCryptIf::doHashPassphrase(DEK *dek,
 				   const unsigned char *pw,
 				   size_t pwlen,
 				   STRING2KEY *s2k,
 				   bool create)
 {
 	// This function is derived from GnuPG-1.2.5-rc2
 	gcry_md_hd_t md;
 	gcry_error_t err;
 	bool ret = true;
 	size_t pass, i;
 	size_t used = 0;
 
 	PWM_ASSERT(s2k->hash_algo);
 	BUG_ON(!(dek->keylen > 0 && dek->keylen <= array_size(dek->key)));
 
 	err = gcry_md_open(&md, s2k->hash_algo, 0);
 	if (err != GPG_ERR_NO_ERROR) {
 		ret = false;
 		goto out;
 	}
 	for (pass = 0; used < dek->keylen; pass++) {
 		if (pass) {
 			gcry_md_reset(md);
 			for (i = 0; i < pass; i++) // preset the hash context
 			gcry_md_putc(md, 0);
 		}
 		if (s2k->mode == 1 || s2k->mode == 3) {
 			size_t len2 = pwlen + 8;
 			size_t count = len2;
 
 			if (create && !pass) {
 				Randomizer *rnd = Randomizer::obj();
 				const unsigned int salt_len = 8;
 				string rndBuf(rnd->genRndBuf(salt_len));
 				memcpy(s2k->salt, rndBuf.c_str(), salt_len);
 				if (s2k->mode == 3)
 					s2k->count = 96; // 65536 iterations
 			}
 			if (s2k->mode == 3) {
 				count = (16ul + (s2k->count & 15)) << ((s2k->count >> 4) + 6);
 				if (count < len2)
 					count = len2;
 			}
 			// a little bit complicated because we need a ulong for count
 			while (count > len2) { // maybe iterated+salted
 				gcry_md_write(md, s2k->salt, 8);
 				gcry_md_write(md, pw, pwlen);
 				count -= len2;
 			}
 			if (count < 8) {
 				gcry_md_write(md, s2k->salt, count);
 			} else {
 				gcry_md_write(md, s2k->salt, 8);
 				count -= 8;
 				gcry_md_write(md, pw, count);
 			}
 		} else
 			gcry_md_write(md, pw, pwlen);
 		gcry_md_final(md);
 		i = gcry_md_get_algo_dlen(s2k->hash_algo);
 		if (i > dek->keylen - used)
 			i = dek->keylen - used;
 		memcpy(dek->key+used, gcry_md_read(md, s2k->hash_algo), i);
 		used += i;
 	}
 	gcry_md_close(md);
 out:
 	return ret;
 }
 
 void LibGCryptIf::padData(unsigned char *buf,
 			  size_t bufLen,
 			  size_t boundary)
 {
 	size_t numPadBytes = boundary - ((bufLen + 1) % boundary);
 	buf[bufLen] = static_cast<char>(0x01);
 	size_t i = 0;
 	Randomizer *rnd = Randomizer::obj();
 	char c;
 	unsigned char *b;
 	while (i < numPadBytes) {
 		c = rnd->genRndChar();
 		if (c == static_cast<char>(0x01))
 			continue;
 		b = buf + bufLen + 1 + i;
 		*b = c;
 		++i;
 	}
 }
 
 void LibGCryptIf::unpadData(const unsigned char *buf,
 		 	    size_t *bufLen)
 {
 	size_t pos;
 	BUG_ON(*bufLen % 8);
 	pos = *bufLen - 1;
 	while (buf[pos] != static_cast<char>(0x01)) {
 		BUG_ON(!pos);
 		--pos;
 	}
 	*bufLen = pos;
 }
 
 #endif // CONFIG_PWMANAGER_GCRY
 
diff --git a/pwmanager/pwmanager/libgcryptif.h b/pwmanager/pwmanager/libgcryptif.h
index ce76675..dffd55b 100644
--- a/pwmanager/pwmanager/libgcryptif.h
+++ b/pwmanager/pwmanager/libgcryptif.h
@@ -1,166 +1,166 @@
 /***************************************************************************
  *                                                                         *
  *   copyright (C) 2004 by Michael Buesch                                  *
  *   email: mbuesch@freenet.de                                             *
  *                                                                         *
  *   hashPassphrase() is derived from GnuPG and is                         *
  *   Copyright (C) 1998, 1999, 2000, 2001, 2003                            *
  *   Free Software Foundation, Inc.                                        *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License version 2        *
  *   as published by the Free Software Foundation.                         *
  *                                                                         *
  ***************************************************************************/
 
 /***************************************************************************
  * copyright (C) 2004 by Ulf Schenk
- * This file is originaly based on version 2.0 of pwmanager
+ * This file is originaly based on version 1.1 of pwmanager
  * and was modified to run on embedded devices that run microkde
  *
  * $Id$
  **************************************************************************/  
 
 #ifndef __LIBGCRYPTIF_H
 #define __LIBGCRYPTIF_H
 
 #include "pwmexception.h"
 
 //#undef CONFIG_PWMANAGER_GCRY // for debugging only.
 #ifdef CONFIG_PWMANAGER_GCRY
 
 #include <stddef.h>
 #include <sys/types.h>
 #include <stdint.h>
 
 #define STRING2KEY_SALTLEN	8
 
 /** interface class for the libgcrypt cipher and hash algorithms
   * NOTE: Always allocate 1024 extra bytes for the inBuf (for padding)
   */
 class LibGCryptIf
 {
 protected:
 	struct STRING2KEY
 	{
 		int  mode;
 		int hash_algo;
 		uint8_t salt[STRING2KEY_SALTLEN];
 		uint32_t  count;
 	};
 	struct DEK
 	{
 		size_t keylen;
 		uint8_t key[32]; // this is the largest used keylen (256 bit)
 	};
 
 public:
 	LibGCryptIf() { }
 	/** is libgcrypt available? */
 	static bool available()
 			{ return true; }
 	/** encrypt data. _algo is the PWM_CRYPT_* ID
 	  * of the algorithm.
 	  */
 	PwMerror encrypt(unsigned char **outBuf,
 			 size_t *outBufLen,
 			 unsigned char *inBuf,
 			 size_t inBufLen,
 			 const unsigned char *key,
 			 size_t keylen,
 			 char _algo);
 	/** decrypt data. _algo is the PWM_CRYPT_* ID
 	  * of the algorithm.
 	  */
 	PwMerror decrypt(unsigned char **outBuf,
 			 size_t *outBufLen,
 			 const unsigned char *inBuf,
 			 size_t inBufLen,
 			 const unsigned char *key,
 			 size_t keylen,
 			 char _algo);
 	/** hash data. _algo is the PWM_HASH_* ID of the hash */
 	PwMerror hash(unsigned char **outBuf,
 		      size_t *outBufLen,
 		      const unsigned char *inBuf,
 		      size_t inBufLen,
 		      char _algo);
 	/** returns the length of the hash. _algo is the PWM_HASH_*
 	  * id of the hash. returns 0 on error.
 	  */
 	unsigned int hashLength(char _algo);
 
 protected:
 	/** returns the total buffer length */
 	size_t getBufLen(size_t inBufLen, size_t boundary)
 		{
 			return ((boundary - (inBufLen % boundary)) + inBufLen);
 		}
 	/** pad the data up to the given boundary.
 	  * "buf" has to be big enough!
 	  */
 	void padData(unsigned char *buf,
 		     size_t bufLen,
 		     size_t boundary);
 	/** unpad the data */
 	void unpadData(const unsigned char *buf,
 		       size_t *bufLen);
 	/** maps the PWM_CRYPT_* ID of an algorithm
 	  * to the libgcrypt GCRY_CIPHER_* ID
 	  */
 	int mapCipherId(char algo);
 	/** maps the PWM_HASH_* ID of an algorithm
 	  * to the libgcrypt GCRY_MD_* ID
 	  */
 	int mapHashId(char algo);
 	/** hash a passphrase to a cipher key */
 	bool hashPassphrase(const unsigned char *pw,
 			    size_t pwlen,
 			    unsigned char *salt,
 			    unsigned char *key,
 			    size_t keylen,
 			    bool create);
 	/** hash a passphrase to a cipher key */
 	bool doHashPassphrase(DEK *dek,
 			      const unsigned char *pw,
 			      size_t pwlen,
 			      STRING2KEY *s2k,
 			      bool create);
 };
 
 
 #else // CONFIG_PWMANAGER_GCRY
 /** libgcrypt is not installed. This is a NOP wrapper. */
 class LibGCryptIf
 {
 public:
 	LibGCryptIf() { }
 	static bool available()
 			{ return false; }
 	PwMerror encrypt(unsigned char **,
 			 size_t *,
 			 unsigned char *,
 			 size_t,
 			 const unsigned char *,
 			 size_t,
 			 char)
 			{ return e_cryptNotImpl; }
 	PwMerror decrypt(unsigned char **,
 			 size_t *,
 			 const unsigned char *,
 			 size_t,
 			 const unsigned char *,
 			 size_t,
 			 char)
 			{ return e_cryptNotImpl; }
 	PwMerror hash(unsigned char **,
 		      size_t *,
 		      const unsigned char *,
 		      size_t,
 		      char)
 			{ return e_hashNotImpl; }
 	unsigned int hashLength(char)
 			{ return 0; }
 };
 #endif // CONFIG_PWMANAGER_GCRY
 #endif // __LIBGCRYPTIF_H