diff options
Diffstat (limited to 'src/cipher.c')
| -rw-r--r-- | src/cipher.c | 40 |
1 files changed, 19 insertions, 21 deletions
diff --git a/src/cipher.c b/src/cipher.c index 427ce9a..d6eae57 100644 --- a/src/cipher.c +++ b/src/cipher.c @@ -13,9 +13,9 @@ * message authentication based on the methodes used by SRTP. It is * intended to deliver a generic, scaleable and secure solution for * tunneling and relaying of packets of any protocol. - * * - * Copyright (C) 2007-2010 Christian Pointner <equinox@anytun.org> + * + * Copyright (C) 2007-2014 Christian Pointner <equinox@anytun.org> * * This file is part of uAnytun. * @@ -47,7 +47,7 @@ int cipher_init(cipher_t* c, const char* type) { - if(!c) + if(!c) return -1; c->key_length_ = 0; @@ -61,7 +61,7 @@ int cipher_init(cipher_t* c, const char* type) if(type[7] == 0) { c->key_length_ = C_AESCTR_DEFAULT_KEY_LENGTH; } - else if(type[7] != '-') + else if(type[7] != '-') return -1; else { const char* tmp = &type[8]; @@ -113,12 +113,12 @@ void cipher_close(cipher_t* c) int cipher_encrypt(cipher_t* c, key_derivation_t* kd, key_derivation_dir_t dir, plain_packet_t* in, encrypted_packet_t* out, seq_nr_t seq_nr, sender_id_t sender_id, mux_t mux) { - if(!c) + if(!c) return -1; - int32_t len; + int32_t len; if(c->type_ == c_null) - len = cipher_null_crypt(plain_packet_get_packet(in), plain_packet_get_length(in), + len = cipher_null_crypt(plain_packet_get_packet(in), plain_packet_get_length(in), encrypted_packet_get_payload(out), encrypted_packet_get_payload_length(out)); #ifndef NO_CRYPT else if(c->type_ == c_aes_ctr) @@ -134,7 +134,7 @@ int cipher_encrypt(cipher_t* c, key_derivation_t* kd, key_derivation_dir_t dir, if(len < 0) return 0; - encrypted_packet_set_sender_id(out, sender_id); + encrypted_packet_set_sender_id(out, sender_id); encrypted_packet_set_seq_nr(out, seq_nr); encrypted_packet_set_mux(out, mux); @@ -145,10 +145,10 @@ int cipher_encrypt(cipher_t* c, key_derivation_t* kd, key_derivation_dir_t dir, int cipher_decrypt(cipher_t* c, key_derivation_t* kd, key_derivation_dir_t dir, encrypted_packet_t* in, plain_packet_t* out) { - if(!c) + if(!c) return -1; - int32_t len; + int32_t len; if(c->type_ == c_null) len = cipher_null_crypt(encrypted_packet_get_payload(in), encrypted_packet_get_payload_length(in), plain_packet_get_packet(out), plain_packet_get_length(out)); @@ -163,11 +163,11 @@ int cipher_decrypt(cipher_t* c, key_derivation_t* kd, key_derivation_dir_t dir, log_printf(ERROR, "unknown cipher type"); return -1; } - + if(len < 0) return 0; - plain_packet_set_length(out, len); + plain_packet_set_length(out, len); return 0; } @@ -176,7 +176,7 @@ int cipher_decrypt(cipher_t* c, key_derivation_t* kd, key_derivation_dir_t dir, int32_t cipher_null_crypt(u_int8_t* in, u_int32_t ilen, u_int8_t* out, u_int32_t olen) { - memcpy(out, in, (ilen < olen) ? ilen : olen); + memcpy(out, in, (ilen < olen) ? ilen : olen); return (ilen < olen) ? ilen : olen; } @@ -227,7 +227,7 @@ int cipher_aesctr_init(cipher_t* c) if(err) { log_printf(ERROR, "failed to open cipher: %s", gcry_strerror(err)); return -1; - } + } #endif return 0; @@ -241,10 +241,8 @@ void cipher_aesctr_close(cipher_t* c) if(c->params_) { #ifndef USE_SSL_CRYPTO cipher_aesctr_param_t* params = c->params_; - if(params->handle_) - gcry_cipher_close(params->handle_); + gcry_cipher_close(params->handle_); #endif - free(c->params_); } } @@ -253,7 +251,7 @@ int cipher_aesctr_calc_ctr(cipher_t* c, key_derivation_t* kd, key_derivation_dir { if(!c || !c->params_) return -1; - + cipher_aesctr_param_t* params = c->params_; int ret = key_derivation_generate(kd, dir, LABEL_SALT, seq_nr, c->salt_.buf_, C_AESCTR_SALT_LENGTH); @@ -286,7 +284,7 @@ int32_t cipher_aesctr_crypt(cipher_t* c, key_derivation_t* kd, key_derivation_di int ret = key_derivation_generate(kd, dir, LABEL_ENC, seq_nr, c->key_.buf_, c->key_.length_); if(ret < 0) return ret; - + #ifdef USE_SSL_CRYPTO ret = AES_set_encrypt_key(c->key_.buf_, c->key_length_, ¶ms->aes_key_); if(ret) { @@ -306,7 +304,7 @@ int32_t cipher_aesctr_crypt(cipher_t* c, key_derivation_t* kd, key_derivation_di log_printf(ERROR, "failed to calculate cipher CTR"); return ret; } - + #ifndef USE_SSL_CRYPTO err = gcry_cipher_setctr(params->handle_, params->ctr_.buf_, C_AESCTR_CTR_LENGTH); if(err) { @@ -329,6 +327,6 @@ int32_t cipher_aesctr_crypt(cipher_t* c, key_derivation_t* kd, key_derivation_di AES_ctr128_encrypt(in, out, (ilen < olen) ? ilen : olen, ¶ms->aes_key_, params->ctr_.buf_, params->ecount_buf_, &num); #endif - return (ilen < olen) ? ilen : olen; + return (ilen < olen) ? ilen : olen; } #endif |