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-rw-r--r--src/ratchet.cpp60
1 files changed, 34 insertions, 26 deletions
diff --git a/src/ratchet.cpp b/src/ratchet.cpp
index b04099f..abcc8a1 100644
--- a/src/ratchet.cpp
+++ b/src/ratchet.cpp
@@ -15,7 +15,7 @@
#include "olm/ratchet.hh"
#include "olm/message.hh"
#include "olm/memory.hh"
-#include "olm/cipher.hh"
+#include "olm/cipher.h"
#include "olm/pickle.hh"
#include <cstring>
@@ -50,7 +50,7 @@ static void create_chain_key(
olm::SharedKey secret;
olm::curve25519_shared_secret(our_key, their_key, secret);
std::uint8_t derived_secrets[2 * olm::KEY_LENGTH];
- olm::hkdf_sha256(
+ _olm_crypto_hkdf_sha256(
secret, sizeof(secret),
root_key, sizeof(root_key),
info.ratchet_info, info.ratchet_info_length,
@@ -70,7 +70,7 @@ static void advance_chain_key(
olm::ChainKey const & chain_key,
olm::ChainKey & new_chain_key
) {
- olm::hmac_sha256(
+ _olm_crypto_hmac_sha256(
chain_key.key, sizeof(chain_key.key),
CHAIN_KEY_SEED, sizeof(CHAIN_KEY_SEED),
new_chain_key.key
@@ -84,7 +84,7 @@ static void create_message_keys(
olm::ChainKey const & chain_key,
olm::KdfInfo const & info,
olm::MessageKey & message_key) {
- olm::hmac_sha256(
+ _olm_crypto_hmac_sha256(
chain_key.key, sizeof(chain_key.key),
MESSAGE_KEY_SEED, sizeof(MESSAGE_KEY_SEED),
message_key.key
@@ -94,12 +94,13 @@ static void create_message_keys(
static std::size_t verify_mac_and_decrypt(
- olm::Cipher const & cipher,
+ _olm_cipher const *cipher,
olm::MessageKey const & message_key,
olm::MessageReader const & reader,
std::uint8_t * plaintext, std::size_t max_plaintext_length
) {
- return cipher.decrypt(
+ return cipher->ops->decrypt(
+ cipher,
message_key.key, sizeof(message_key.key),
reader.input, reader.input_length,
reader.ciphertext, reader.ciphertext_length,
@@ -183,10 +184,10 @@ static std::size_t verify_mac_and_decrypt_for_new_chain(
olm::Ratchet::Ratchet(
olm::KdfInfo const & kdf_info,
- Cipher const & ratchet_cipher
+ _olm_cipher const * ratchet_cipher
) : kdf_info(kdf_info),
ratchet_cipher(ratchet_cipher),
- last_error(olm::ErrorCode::SUCCESS) {
+ last_error(OlmErrorCode::OLM_SUCCESS) {
}
@@ -195,7 +196,7 @@ void olm::Ratchet::initialise_as_bob(
olm::Curve25519PublicKey const & their_ratchet_key
) {
std::uint8_t derived_secrets[2 * olm::KEY_LENGTH];
- olm::hkdf_sha256(
+ _olm_crypto_hkdf_sha256(
shared_secret, shared_secret_length,
nullptr, 0,
kdf_info.root_info, kdf_info.root_info_length,
@@ -217,7 +218,7 @@ void olm::Ratchet::initialise_as_alice(
olm::Curve25519KeyPair const & our_ratchet_key
) {
std::uint8_t derived_secrets[2 * olm::KEY_LENGTH];
- olm::hkdf_sha256(
+ _olm_crypto_hkdf_sha256(
shared_secret, shared_secret_length,
nullptr, 0,
kdf_info.root_info, kdf_info.root_info_length,
@@ -405,11 +406,12 @@ std::size_t olm::Ratchet::encrypt_output_length(
if (!sender_chain.empty()) {
counter = sender_chain[0].chain_key.index;
}
- std::size_t padded = ratchet_cipher.encrypt_ciphertext_length(
+ std::size_t padded = ratchet_cipher->ops->encrypt_ciphertext_length(
+ ratchet_cipher,
plaintext_length
);
return olm::encode_message_length(
- counter, olm::KEY_LENGTH, padded, ratchet_cipher.mac_length()
+ counter, olm::KEY_LENGTH, padded, ratchet_cipher->ops->mac_length(ratchet_cipher)
);
}
@@ -427,11 +429,11 @@ std::size_t olm::Ratchet::encrypt(
std::size_t output_length = encrypt_output_length(plaintext_length);
if (random_length < encrypt_random_length()) {
- last_error = olm::ErrorCode::NOT_ENOUGH_RANDOM;
+ last_error = OlmErrorCode::OLM_NOT_ENOUGH_RANDOM;
return std::size_t(-1);
}
if (max_output_length < output_length) {
- last_error = olm::ErrorCode::OUTPUT_BUFFER_TOO_SMALL;
+ last_error = OlmErrorCode::OLM_OUTPUT_BUFFER_TOO_SMALL;
return std::size_t(-1);
}
@@ -452,7 +454,8 @@ std::size_t olm::Ratchet::encrypt(
create_message_keys(chain_index, sender_chain[0].chain_key, kdf_info, keys);
advance_chain_key(chain_index, sender_chain[0].chain_key, sender_chain[0].chain_key);
- std::size_t ciphertext_length = ratchet_cipher.encrypt_ciphertext_length(
+ std::size_t ciphertext_length = ratchet_cipher->ops->encrypt_ciphertext_length(
+ ratchet_cipher,
plaintext_length
);
std::uint32_t counter = keys.index;
@@ -467,7 +470,8 @@ std::size_t olm::Ratchet::encrypt(
olm::store_array(writer.ratchet_key, ratchet_key.public_key);
- ratchet_cipher.encrypt(
+ ratchet_cipher->ops->encrypt(
+ ratchet_cipher,
keys.key, sizeof(keys.key),
plaintext, plaintext_length,
writer.ciphertext, ciphertext_length,
@@ -484,15 +488,17 @@ std::size_t olm::Ratchet::decrypt_max_plaintext_length(
) {
olm::MessageReader reader;
olm::decode_message(
- reader, input, input_length, ratchet_cipher.mac_length()
+ reader, input, input_length,
+ ratchet_cipher->ops->mac_length(ratchet_cipher)
);
if (!reader.ciphertext) {
- last_error = olm::ErrorCode::BAD_MESSAGE_FORMAT;
+ last_error = OlmErrorCode::OLM_BAD_MESSAGE_FORMAT;
return std::size_t(-1);
}
- return ratchet_cipher.decrypt_max_plaintext_length(reader.ciphertext_length);
+ return ratchet_cipher->ops->decrypt_max_plaintext_length(
+ ratchet_cipher, reader.ciphertext_length);
}
@@ -502,30 +508,32 @@ std::size_t olm::Ratchet::decrypt(
) {
olm::MessageReader reader;
olm::decode_message(
- reader, input, input_length, ratchet_cipher.mac_length()
+ reader, input, input_length,
+ ratchet_cipher->ops->mac_length(ratchet_cipher)
);
if (reader.version != PROTOCOL_VERSION) {
- last_error = olm::ErrorCode::BAD_MESSAGE_VERSION;
+ last_error = OlmErrorCode::OLM_BAD_MESSAGE_VERSION;
return std::size_t(-1);
}
if (!reader.has_counter || !reader.ratchet_key || !reader.ciphertext) {
- last_error = olm::ErrorCode::BAD_MESSAGE_FORMAT;
+ last_error = OlmErrorCode::OLM_BAD_MESSAGE_FORMAT;
return std::size_t(-1);
}
- std::size_t max_length = ratchet_cipher.decrypt_max_plaintext_length(
+ std::size_t max_length = ratchet_cipher->ops->decrypt_max_plaintext_length(
+ ratchet_cipher,
reader.ciphertext_length
);
if (max_plaintext_length < max_length) {
- last_error = olm::ErrorCode::OUTPUT_BUFFER_TOO_SMALL;
+ last_error = OlmErrorCode::OLM_OUTPUT_BUFFER_TOO_SMALL;
return std::size_t(-1);
}
if (reader.ratchet_key_length != olm::KEY_LENGTH) {
- last_error = olm::ErrorCode::BAD_MESSAGE_FORMAT;
+ last_error = OlmErrorCode::OLM_BAD_MESSAGE_FORMAT;
return std::size_t(-1);
}
@@ -588,7 +596,7 @@ std::size_t olm::Ratchet::decrypt(
}
if (result == std::size_t(-1)) {
- last_error = olm::ErrorCode::BAD_MESSAGE_MAC;
+ last_error = OlmErrorCode::OLM_BAD_MESSAGE_MAC;
return std::size_t(-1);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-08 04:20:01 +0000