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Diffstat (limited to 'libs/libaxolotl/src/sender_key.c')
-rw-r--r--libs/libaxolotl/src/sender_key.c285
1 files changed, 0 insertions, 285 deletions
diff --git a/libs/libaxolotl/src/sender_key.c b/libs/libaxolotl/src/sender_key.c
deleted file mode 100644
index 31d7499499..0000000000
--- a/libs/libaxolotl/src/sender_key.c
+++ /dev/null
@@ -1,285 +0,0 @@
-#include "sender_key.h"
-
-#include <assert.h>
-#include <string.h>
-
-#include "hkdf.h"
-#include "signal_protocol_internal.h"
-
-#define HASH_OUTPUT_SIZE 32
-
-struct sender_message_key {
- signal_type_base base;
- uint32_t iteration;
- signal_buffer *iv;
- signal_buffer *cipher_key;
- signal_buffer *seed;
- signal_context *global_context;
-};
-
-struct sender_chain_key {
- signal_type_base base;
- uint32_t iteration;
- signal_buffer *chain_key;
- signal_context *global_context;
-};
-
-static int sender_chain_key_get_derivative(signal_buffer **derivative, uint8_t seed, signal_buffer *key,
- signal_context *global_context);
-
-int sender_message_key_create(sender_message_key **key,
- uint32_t iteration, signal_buffer *seed,
- signal_context *global_context)
-{
- sender_message_key *result = 0;
- int ret = 0;
- ssize_t ret_size = 0;
- hkdf_context *kdf = 0;
- static const char info_material[] = "WhisperGroup";
- uint8_t salt[HASH_OUTPUT_SIZE];
- uint8_t *derivative = 0;
-
- assert(global_context);
-
- if(!seed) {
- return SG_ERR_INVAL;
- }
-
- memset(salt, 0, sizeof(salt));
-
- result = malloc(sizeof(sender_message_key));
- if(!result) {
- return SG_ERR_NOMEM;
- }
-
- SIGNAL_INIT(result, sender_message_key_destroy);
-
- ret = hkdf_create(&kdf, 3, global_context);
- if(ret < 0) {
- goto complete;
- }
-
- ret_size = hkdf_derive_secrets(kdf, &derivative,
- signal_buffer_data(seed), signal_buffer_len(seed),
- salt, sizeof(salt),
- (uint8_t *)info_material, sizeof(info_material) - 1, 48);
- if(ret_size != 48) {
- ret = (ret_size < 0) ? (int)ret_size : SG_ERR_UNKNOWN;
- signal_log(global_context, SG_LOG_WARNING, "hkdf_derive_secrets failed");
- goto complete;
- }
-
- result->iteration = iteration;
-
- result->seed = signal_buffer_copy(seed);
- if(!result->seed) {
- ret = SG_ERR_NOMEM;
- goto complete;
- }
-
- result->iv = signal_buffer_create(derivative, 16);
- if(!result->iv) {
- ret = SG_ERR_NOMEM;
- goto complete;
- }
-
- result->cipher_key = signal_buffer_create(derivative + 16, 32);
- if(!result->cipher_key) {
- ret = SG_ERR_NOMEM;
- goto complete;
- }
-
- result->global_context = global_context;
-
-complete:
- SIGNAL_UNREF(kdf);
- if(derivative) {
- free(derivative);
- }
- if(ret < 0) {
- SIGNAL_UNREF(result);
- }
- else {
- ret = 0;
- *key = result;
- }
- return ret;
-}
-
-uint32_t sender_message_key_get_iteration(sender_message_key *key)
-{
- assert(key);
- return key->iteration;
-}
-
-signal_buffer *sender_message_key_get_iv(sender_message_key *key)
-{
- assert(key);
- return key->iv;
-}
-
-signal_buffer *sender_message_key_get_cipher_key(sender_message_key *key)
-{
- assert(key);
- return key->cipher_key;
-}
-
-signal_buffer *sender_message_key_get_seed(sender_message_key *key)
-{
- assert(key);
- return key->seed;
-}
-
-void sender_message_key_destroy(signal_type_base *type)
-{
- sender_message_key *key = (sender_message_key *)type;
- signal_buffer_bzero_free(key->iv);
- signal_buffer_bzero_free(key->cipher_key);
- signal_buffer_bzero_free(key->seed);
- free(key);
-}
-
-int sender_chain_key_create(sender_chain_key **key,
- uint32_t iteration, signal_buffer *chain_key,
- signal_context *global_context)
-{
- sender_chain_key *result = 0;
- int ret = 0;
-
- assert(global_context);
-
- if(!chain_key) {
- return SG_ERR_INVAL;
- }
-
- result = malloc(sizeof(sender_chain_key));
- if(!result) {
- return SG_ERR_NOMEM;
- }
-
- SIGNAL_INIT(result, sender_chain_key_destroy);
-
- result->iteration = iteration;
-
- result->chain_key = signal_buffer_copy(chain_key);
- if(!result->chain_key) {
- ret = SG_ERR_NOMEM;
- goto complete;
- }
-
- result->global_context = global_context;
-
-complete:
- if(ret < 0) {
- SIGNAL_UNREF(result);
- }
- else {
- ret = 0;
- *key = result;
- }
- return ret;
-}
-
-uint32_t sender_chain_key_get_iteration(sender_chain_key *key)
-{
- assert(key);
- return key->iteration;
-}
-
-int sender_chain_key_create_message_key(sender_chain_key *key, sender_message_key **message_key)
-{
- static const uint8_t MESSAGE_KEY_SEED = 0x01;
- int ret = 0;
- signal_buffer *derivative = 0;
- sender_message_key *result = 0;
-
- assert(key);
-
- ret = sender_chain_key_get_derivative(&derivative, MESSAGE_KEY_SEED, key->chain_key, key->global_context);
- if(ret < 0) {
- goto complete;
- }
-
- ret = sender_message_key_create(&result, key->iteration, derivative, key->global_context);
-
-complete:
- signal_buffer_free(derivative);
- if(ret >= 0) {
- ret = 0;
- *message_key = result;
- }
- return ret;
-}
-
-int sender_chain_key_create_next(sender_chain_key *key, sender_chain_key **next_key)
-{
- static const uint8_t CHAIN_KEY_SEED = 0x02;
- int ret = 0;
- signal_buffer *derivative = 0;
- sender_chain_key *result = 0;
-
- assert(key);
-
- ret = sender_chain_key_get_derivative(&derivative, CHAIN_KEY_SEED, key->chain_key, key->global_context);
- if(ret < 0) {
- goto complete;
- }
-
- ret = sender_chain_key_create(&result, key->iteration + 1, derivative, key->global_context);
-
-complete:
- signal_buffer_free(derivative);
- if(ret >= 0) {
- ret = 0;
- *next_key = result;
- }
- return ret;
-}
-
-signal_buffer *sender_chain_key_get_seed(sender_chain_key *key)
-{
- assert(key);
- return key->chain_key;
-}
-
-void sender_chain_key_destroy(signal_type_base *type)
-{
- sender_chain_key *key = (sender_chain_key *)type;
- signal_buffer_bzero_free(key->chain_key);
- free(key);
-}
-
-int sender_chain_key_get_derivative(signal_buffer **derivative, uint8_t seed, signal_buffer *key,
- signal_context *global_context)
-{
- int result = 0;
- signal_buffer *output_buffer = 0;
- void *hmac_context = 0;
-
- result = signal_hmac_sha256_init(global_context, &hmac_context,
- signal_buffer_data(key), signal_buffer_len(key));
- if(result < 0) {
- goto complete;
- }
-
- result = signal_hmac_sha256_update(global_context, hmac_context, &seed, sizeof(seed));
- if(result < 0) {
- goto complete;
- }
-
- result = signal_hmac_sha256_final(global_context, hmac_context, &output_buffer);
- if(result < 0) {
- goto complete;
- }
-
-complete:
- signal_hmac_sha256_cleanup(global_context, hmac_context);
-
- if(result < 0) {
- signal_buffer_free(output_buffer);
- }
- else {
- *derivative = output_buffer;
- }
- return result;
-}
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