diff options
| author | Christian Pointner <equinox@anytun.org> | 2009-01-04 22:31:33 +0000 |
|---|---|---|
| committer | Christian Pointner <equinox@anytun.org> | 2009-01-04 22:31:33 +0000 |
| commit | 4bdb7d2512e65eab86559ad8fb011e1b359b0425 (patch) | |
| tree | f59fdc75bd03e5b912ee91ad1e3681191043825f /src/cipher.c | |
| parent | added libgmp free ctr calc implementation to key derivation (diff) | |
added libgmp free calc ctr implementation to cipher
Diffstat (limited to 'src/cipher.c')
| -rw-r--r-- | src/cipher.c | 30 |
1 files changed, 22 insertions, 8 deletions
diff --git a/src/cipher.c b/src/cipher.c index ff9e4e9..1a2a4fb 100644 --- a/src/cipher.c +++ b/src/cipher.c @@ -62,7 +62,7 @@ int cipher_init(cipher_t* c, const char* type) else if(!strncmp(type, "aes-ctr", 7)) { c->type_ = c_aes_ctr; if(type[7] == 0) { - c->key_length_ = 128; + c->key_length_ = C_AES_DEFAULT_KEY_LENGTH; } else if(type[7] != '-') return -1; @@ -202,7 +202,7 @@ int cipher_aesctr_init(cipher_t* c) if(c->salt_.buf_) free(c->salt_.buf_); - c->salt_.length_ = 14; + c->salt_.length_ = C_AES_CTR_LENGTH - C_AES_CTR_ZERO_LENGTH; c->salt_.buf_ = malloc(c->salt_.length_); if(!c->salt_.buf_) return -2; @@ -216,18 +216,21 @@ int cipher_aesctr_init(cipher_t* c) cipher_aesctr_param_t* params = c->params_; #ifndef NO_LIBGMP - mpz_init2(params->mp_ctr, 128); - mpz_init2(params->mp_sid_mux, 128); - mpz_init2(params->mp_seq, 128); -#endif + mpz_init2(params->mp_ctr, C_AES_CTR_LENGTH * 8); + mpz_init2(params->mp_sid_mux, C_AES_CTR_LENGTH * 8); + mpz_init2(params->mp_seq, C_AES_CTR_LENGTH * 8); - params->ctr_.length_ = 16; + params->ctr_.length_ = C_AES_CTR_LENGTH; params->ctr_.buf_ = malloc(params->ctr_.length_); if(!params->ctr_.buf_) { free(c->params_); c->params_ = NULL; return -2; } +#else + params->ctr_.length_ = C_AES_CTR_LENGTH; + params->ctr_.buf_ = params->ctr_.ctr_.buf_; +#endif int algo; @@ -261,9 +264,10 @@ void cipher_aesctr_close(cipher_t* c) mpz_clear(params->mp_ctr); mpz_clear(params->mp_sid_mux); mpz_clear(params->mp_seq); -#endif + if(params->ctr_.buf_) free(params->ctr_.buf_); +#endif if(params->handle_) gcry_cipher_close(params->handle_); @@ -312,6 +316,16 @@ int cipher_aesctr_calc_ctr(cipher_t* c, key_derivation_t* kd, seq_nr_t seq_nr, s return -1; } mpz_export(params->ctr_.buf_, NULL, 1, 1, 0, 0, params->mp_ctr); +#else + if(c->salt_.length_ != sizeof(params->ctr_.ctr_.salt_.buf_)) { + log_printf(ERR, "cipher salt has the wrong length"); + return -1; + } + memcpy(params->ctr_.ctr_.salt_.buf_, c->salt_.buf_, sizeof(params->ctr_.ctr_.salt_.buf_)); + memset(params->ctr_.ctr_.salt_.zero_, 0, sizeof(params->ctr_.ctr_.salt_.zero_)); + params->ctr_.ctr_.params_.mux_ ^= MUX_T_HTON(mux); + params->ctr_.ctr_.params_.sender_id_ ^= SENDER_ID_T_HTON(sender_id); + params->ctr_.ctr_.params_.seq_nr_ ^= SEQ_NR_T_HTON(seq_nr); #endif #ifndef ANYTUN_02_COMPAT |