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iv-gen: Add a generic constructor to create an IV gen from an algorithm

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This commit is contained in:
Martin Willi 2015-03-31 14:58:17 +02:00
parent c2906c8f21
commit a4549e5525
4 changed files with 71 additions and 2 deletions
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2
src/libstrongswan/Android.mk
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@ -14,7 +14,7 @@ crypto/prfs/prf.c crypto/prfs/mac_prf.c crypto/pkcs5.c \
crypto/rngs/rng.c crypto/prf_plus.c crypto/signers/signer.c \
crypto/signers/mac_signer.c crypto/crypto_factory.c crypto/crypto_tester.c \
crypto/diffie_hellman.c crypto/aead.c crypto/transform.c \
crypto/iv/iv_gen_rand.c crypto/iv/iv_gen_seq.c \
crypto/iv/iv_gen.c crypto/iv/iv_gen_rand.c crypto/iv/iv_gen_seq.c \
crypto/mgf1/mgf1.c crypto/mgf1/mgf1_bitspender.c \
credentials/credential_factory.c credentials/builder.c \
credentials/cred_encoding.c credentials/keys/private_key.c \

2
src/libstrongswan/Makefile.am
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@ -12,7 +12,7 @@ crypto/prfs/prf.c crypto/prfs/mac_prf.c crypto/pkcs5.c \
crypto/rngs/rng.c crypto/prf_plus.c crypto/signers/signer.c \
crypto/signers/mac_signer.c crypto/crypto_factory.c crypto/crypto_tester.c \
crypto/diffie_hellman.c crypto/aead.c crypto/transform.c \
crypto/iv/iv_gen_rand.c crypto/iv/iv_gen_seq.c \
crypto/iv/iv_gen.c crypto/iv/iv_gen_rand.c crypto/iv/iv_gen_seq.c \
crypto/mgf1/mgf1.c crypto/mgf1/mgf1_bitspender.c \
credentials/credential_factory.c credentials/builder.c \
credentials/cred_encoding.c credentials/keys/private_key.c \

61
src/libstrongswan/crypto/iv/iv_gen.c Normal file
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@ -0,0 +1,61 @@
/*
* Copyright (C) 2015 Martin Willi
* Copyright (C) 2015 revosec AG
*
* 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 "iv_gen.h"
#include "iv_gen_rand.h"
#include "iv_gen_seq.h"
/**
* See header.
*/
iv_gen_t* iv_gen_create_for_alg(encryption_algorithm_t alg)
{
switch (alg)
{
case ENCR_DES:
case ENCR_3DES:
case ENCR_RC5:
case ENCR_IDEA:
case ENCR_CAST:
case ENCR_BLOWFISH:
case ENCR_3IDEA:
case ENCR_AES_CBC:
case ENCR_CAMELLIA_CBC:
case ENCR_SERPENT_CBC:
case ENCR_TWOFISH_CBC:
case ENCR_RC2_CBC:
return iv_gen_rand_create();
case ENCR_AES_CTR:
case ENCR_AES_CCM_ICV8:
case ENCR_AES_CCM_ICV12:
case ENCR_AES_CCM_ICV16:
case ENCR_AES_GCM_ICV8:
case ENCR_AES_GCM_ICV12:
case ENCR_AES_GCM_ICV16:
case ENCR_CAMELLIA_CTR:
case ENCR_CAMELLIA_CCM_ICV8:
case ENCR_CAMELLIA_CCM_ICV12:
case ENCR_CAMELLIA_CCM_ICV16:
case ENCR_NULL_AUTH_AES_GMAC:
return iv_gen_seq_create();
case ENCR_NULL:
case ENCR_UNDEFINED:
case ENCR_DES_ECB:
case ENCR_DES_IV32:
case ENCR_DES_IV64:
break;
}
return NULL;
}

8
src/libstrongswan/crypto/iv/iv_gen.h
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@ -58,4 +58,12 @@ struct iv_gen_t {
void (*destroy)(iv_gen_t *this);
};
/**
* Select an IV generator for a given encryption algorithm.
*
* @param alg encryption algorithm
* @return IV generator
*/
iv_gen_t* iv_gen_create_for_alg(encryption_algorithm_t alg);
#endif /** IV_GEN_H_ @}*/