diff options
Diffstat (limited to 'src/cipher.c')
| -rw-r--r-- | src/cipher.c | 35 |
1 files changed, 26 insertions, 9 deletions
diff --git a/src/cipher.c b/src/cipher.c index f1a4bf4..07c9f32 100644 --- a/src/cipher.c +++ b/src/cipher.c @@ -44,7 +44,9 @@ #include <stdlib.h> #include <string.h> +#ifndef NO_LIBGMP #include <gmp.h> +#endif int cipher_init(cipher_t* c, const char* type) { @@ -56,6 +58,7 @@ int cipher_init(cipher_t* c, const char* type) c->type_ = c_unknown; if(!strcmp(type, "null")) c->type_ = c_null; +#ifndef NO_CRYPT else if(!strncmp(type, "aes-ctr", 7)) { c->type_ = c_aes_ctr; if(type[7] == 0) { @@ -68,12 +71,15 @@ int cipher_init(cipher_t* c, const char* type) c->key_length_ = atoi(tmp); } } +#endif else { log_printf(ERR, "unknown cipher type"); return -1; } +#ifndef NO_CRYPT c->handle_ = 0; +#endif c->key_.buf_ = NULL; c->key_.length_ = 0; @@ -82,8 +88,10 @@ int cipher_init(cipher_t* c, const char* type) c->salt_.length_ = 0; int ret = 0; +#ifndef NO_CRYPT if(c->type_ == c_aes_ctr) ret = cipher_aesctr_init(c); +#endif if(ret) cipher_close(c); @@ -96,8 +104,10 @@ void cipher_close(cipher_t* c) if(!c) return; +#ifndef NO_CRYPT if(c->type_ == c_aes_ctr) cipher_aesctr_close(c); +#endif if(c->key_.buf_) free(c->key_.buf_); @@ -115,10 +125,12 @@ int cipher_encrypt(cipher_t* c, key_derivation_t* kd, plain_packet_t* in, encryp if(c->type_ == c_null) 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) len = cipher_aesctr_crypt(c, kd, plain_packet_get_packet(in), plain_packet_get_length(in), encrypted_packet_get_payload(out), encrypted_packet_get_payload_length(out), seq_nr, sender_id, mux); +#endif else { log_printf(ERR, "unknown cipher type"); return -1; @@ -145,11 +157,13 @@ int cipher_decrypt(cipher_t* c, key_derivation_t* kd, encrypted_packet_t* in, pl 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)); +#ifndef NO_CRYPT else if(c->type_ == c_aes_ctr) len = cipher_aesctr_crypt(c, kd, encrypted_packet_get_payload(in), encrypted_packet_get_payload_length(in), plain_packet_get_packet(out), plain_packet_get_length(out), encrypted_packet_get_seq_nr(in), encrypted_packet_get_sender_id(in), encrypted_packet_get_mux(in)); +#endif else { log_printf(ERR, "unknown cipher type"); return -1; @@ -171,6 +185,7 @@ int32_t cipher_null_crypt(u_int8_t* in, u_int32_t ilen, u_int8_t* out, u_int32_t return (ilen < olen) ? ilen : olen; } +#ifndef NO_CRYPT /* ---------------- AES-Ctr Cipher ---------------- */ int cipher_aesctr_init(cipher_t* c) @@ -236,17 +251,18 @@ buffer_t cipher_aesctr_calc_ctr(cipher_t* c, key_derivation_t* kd, seq_nr_t seq_ if(ret < 0) return result; - mpz_t ctr, sid_mux, seq; - mpz_init2(ctr, 128); - mpz_init2(sid_mux, 128); - mpz_init2(seq, 128); - int faked_msb = 0; if(!c->salt_.buf_[0]) { c->salt_.buf_[0] = 1; faked_msb = 1; } +#ifndef NO_LIBGMP + mpz_t ctr, sid_mux, seq; + mpz_init2(ctr, 128); + mpz_init2(sid_mux, 128); + mpz_init2(seq, 128); + mpz_import(ctr, c->salt_.length_, 1, 1, 0, 0, c->salt_.buf_); mpz_set_ui(sid_mux, mux); @@ -262,6 +278,10 @@ buffer_t cipher_aesctr_calc_ctr(cipher_t* c, key_derivation_t* kd, seq_nr_t seq_ mpz_mul_2exp(ctr, ctr, 16); result.buf_ = mpz_export(NULL, (size_t*)&result.length_, 1, 1, 0, 0, ctr); + mpz_clear(ctr); + mpz_clear(sid_mux); + mpz_clear(seq); +#endif #ifndef ANYTUN_02_COMPAT if(faked_msb) { @@ -270,10 +290,6 @@ buffer_t cipher_aesctr_calc_ctr(cipher_t* c, key_derivation_t* kd, seq_nr_t seq_ } #endif - mpz_clear(ctr); - mpz_clear(sid_mux); - mpz_clear(seq); - return result; } @@ -328,3 +344,4 @@ int32_t cipher_aesctr_crypt(cipher_t* c, key_derivation_t* kd, u_int8_t* in, u_i return (ilen < olen) ? ilen : olen; } +#endif |