aboutsummaryrefslogtreecommitdiff
path: root/src
diff options
context:
space:
mode:
Diffstat (limited to 'src')
-rw-r--r--src/error.c1
-rw-r--r--src/pk.cpp101
2 files changed, 80 insertions, 22 deletions
diff --git a/src/error.c b/src/error.c
index f541a93..5147b5c 100644
--- a/src/error.c
+++ b/src/error.c
@@ -31,6 +31,7 @@ static const char * ERRORS[] = {
"UNKNOWN_MESSAGE_INDEX",
"BAD_LEGACY_ACCOUNT_PICKLE",
"BAD_SIGNATURE",
+ "OLM_INPUT_BUFFER_TOO_SMALL",
};
const char * _olm_error_to_string(enum OlmErrorCode error)
diff --git a/src/pk.cpp b/src/pk.cpp
index b8fe95b..5cfcea2 100644
--- a/src/pk.cpp
+++ b/src/pk.cpp
@@ -22,15 +22,15 @@
#include "olm/pickle_encoding.h"
#include "olm/pickle.hh"
-extern "C" {
-
static const std::size_t MAC_LENGTH = 8;
- const struct _olm_cipher_aes_sha_256 olm_pk_cipher_aes_sha256 =
+const struct _olm_cipher_aes_sha_256 olm_pk_cipher_aes_sha256 =
OLM_CIPHER_INIT_AES_SHA_256("");
const struct _olm_cipher *olm_pk_cipher =
OLM_CIPHER_BASE(&olm_pk_cipher_aes_sha256);
+extern "C" {
+
struct OlmPkEncryption {
OlmErrorCode last_error;
_olm_curve25519_public_key recipient_key;
@@ -73,7 +73,11 @@ size_t olm_pk_encryption_set_recipient_key (
OlmErrorCode::OLM_OUTPUT_BUFFER_TOO_SMALL; // FIXME:
return std::size_t(-1);
}
- olm::decode_base64((const uint8_t*)key, olm_pk_key_length(), (uint8_t *)encryption->recipient_key.public_key);
+ olm::decode_base64(
+ (const uint8_t*)key,
+ olm_pk_key_length(),
+ (uint8_t *)encryption->recipient_key.public_key
+ );
return 0;
}
@@ -81,7 +85,9 @@ size_t olm_pk_ciphertext_length(
OlmPkEncryption *encryption,
size_t plaintext_length
) {
- return olm::encode_base64_length(_olm_cipher_aes_sha_256_ops.encrypt_ciphertext_length(olm_pk_cipher, plaintext_length));
+ return olm::encode_base64_length(
+ _olm_cipher_aes_sha_256_ops.encrypt_ciphertext_length(olm_pk_cipher, plaintext_length)
+ );
}
size_t olm_pk_mac_length(
@@ -106,9 +112,9 @@ size_t olm_pk_encrypt(
) {
if (ciphertext_length
< olm_pk_ciphertext_length(encryption, plaintext_length)
- || mac_length
+ || mac_length
< _olm_cipher_aes_sha_256_ops.mac_length(olm_pk_cipher)
- || ephemeral_key_size
+ || ephemeral_key_size
< olm_pk_key_length()) {
encryption->last_error =
OlmErrorCode::OLM_OUTPUT_BUFFER_TOO_SMALL;
@@ -122,11 +128,16 @@ size_t olm_pk_encrypt(
_olm_curve25519_key_pair ephemeral_keypair;
_olm_crypto_curve25519_generate_key((uint8_t *) random, &ephemeral_keypair);
- olm::encode_base64((const uint8_t *)ephemeral_keypair.public_key.public_key, CURVE25519_KEY_LENGTH, (uint8_t *)ephemeral_key);
+ olm::encode_base64(
+ (const uint8_t *)ephemeral_keypair.public_key.public_key,
+ CURVE25519_KEY_LENGTH,
+ (uint8_t *)ephemeral_key
+ );
olm::SharedKey secret;
_olm_crypto_curve25519_shared_secret(&ephemeral_keypair, &encryption->recipient_key, secret);
- size_t raw_ciphertext_length = _olm_cipher_aes_sha_256_ops.encrypt_ciphertext_length(olm_pk_cipher, plaintext_length);
+ size_t raw_ciphertext_length =
+ _olm_cipher_aes_sha_256_ops.encrypt_ciphertext_length(olm_pk_cipher, plaintext_length);
uint8_t *ciphertext_pos = (uint8_t *) ciphertext + ciphertext_length - raw_ciphertext_length;
uint8_t raw_mac[MAC_LENGTH];
size_t result = _olm_cipher_aes_sha_256_ops.encrypt(
@@ -176,35 +187,51 @@ size_t olm_clear_pk_decryption(
return sizeof(OlmPkDecryption);
}
-size_t olm_pk_generate_key_random_length(void) {
+size_t olm_pk_private_key_length(void) {
return CURVE25519_KEY_LENGTH;
}
+size_t olm_pk_generate_key_random_length(void) {
+ return olm_pk_private_key_length();
+}
+
size_t olm_pk_key_length(void) {
return olm::encode_base64_length(CURVE25519_KEY_LENGTH);
}
-size_t olm_pk_generate_key(
+size_t olm_pk_key_from_private(
OlmPkDecryption * decryption,
void * pubkey, size_t pubkey_length,
- void * random, size_t random_length
+ void * privkey, size_t privkey_length
) {
- if (pubkey_length < CURVE25519_KEY_LENGTH) {
+ if (pubkey_length < olm_pk_key_length()) {
decryption->last_error =
OlmErrorCode::OLM_OUTPUT_BUFFER_TOO_SMALL;
return std::size_t(-1);
}
- if (random_length < olm_pk_generate_key_random_length()) {
+ if (privkey_length < olm_pk_private_key_length()) {
decryption->last_error =
- OlmErrorCode::OLM_NOT_ENOUGH_RANDOM;
+ OlmErrorCode::OLM_INPUT_BUFFER_TOO_SMALL;
return std::size_t(-1);
}
- _olm_crypto_curve25519_generate_key((uint8_t *) random, &decryption->key_pair);
- olm::encode_base64((const uint8_t *)decryption->key_pair.public_key.public_key, CURVE25519_KEY_LENGTH, (uint8_t *)pubkey);
+ _olm_crypto_curve25519_generate_key((uint8_t *) privkey, &decryption->key_pair);
+ olm::encode_base64(
+ (const uint8_t *)decryption->key_pair.public_key.public_key,
+ CURVE25519_KEY_LENGTH,
+ (uint8_t *)pubkey
+ );
return 0;
}
+size_t olm_pk_generate_key(
+ OlmPkDecryption * decryption,
+ void * pubkey, size_t pubkey_length,
+ void * privkey, size_t privkey_length
+) {
+ return olm_pk_key_from_private(decryption, pubkey, pubkey_length, privkey, privkey_length);
+}
+
namespace {
static const std::uint32_t PK_DECRYPTION_PICKLE_VERSION = 1;
@@ -267,7 +294,10 @@ size_t olm_pickle_pk_decryption(
return std::size_t(-1);
}
pickle(_olm_enc_output_pos(reinterpret_cast<std::uint8_t *>(pickled), raw_length), object);
- return _olm_enc_output(reinterpret_cast<std::uint8_t const *>(key), key_length, reinterpret_cast<std::uint8_t *>(pickled), raw_length);
+ return _olm_enc_output(
+ reinterpret_cast<std::uint8_t const *>(key), key_length,
+ reinterpret_cast<std::uint8_t *>(pickled), raw_length
+ );
}
size_t olm_unpickle_pk_decryption(
@@ -283,7 +313,8 @@ size_t olm_unpickle_pk_decryption(
}
std::uint8_t * const pos = reinterpret_cast<std::uint8_t *>(pickled);
std::size_t raw_length = _olm_enc_input(
- reinterpret_cast<std::uint8_t const *>(key), key_length, pos, pickled_length, &object.last_error
+ reinterpret_cast<std::uint8_t const *>(key), key_length,
+ pos, pickled_length, &object.last_error
);
if (raw_length == std::size_t(-1)) {
return std::size_t(-1);
@@ -300,7 +331,11 @@ size_t olm_unpickle_pk_decryption(
return std::size_t(-1);
}
if (pubkey != NULL) {
- olm::encode_base64((const uint8_t *)object.key_pair.public_key.public_key, CURVE25519_KEY_LENGTH, (uint8_t *)pubkey);
+ olm::encode_base64(
+ (const uint8_t *)object.key_pair.public_key.public_key,
+ CURVE25519_KEY_LENGTH,
+ (uint8_t *)pubkey
+ );
}
return pickled_length;
}
@@ -309,7 +344,9 @@ size_t olm_pk_max_plaintext_length(
OlmPkDecryption * decryption,
size_t ciphertext_length
) {
- return _olm_cipher_aes_sha_256_ops.decrypt_max_plaintext_length(olm_pk_cipher, olm::decode_base64_length(ciphertext_length));
+ return _olm_cipher_aes_sha_256_ops.decrypt_max_plaintext_length(
+ olm_pk_cipher, olm::decode_base64_length(ciphertext_length)
+ );
}
size_t olm_pk_decrypt(
@@ -327,7 +364,10 @@ size_t olm_pk_decrypt(
}
struct _olm_curve25519_public_key ephemeral;
- olm::decode_base64((const uint8_t*)ephemeral_key, ephemeral_key_length, (uint8_t *)ephemeral.public_key);
+ olm::decode_base64(
+ (const uint8_t*)ephemeral_key, ephemeral_key_length,
+ (uint8_t *)ephemeral.public_key
+ );
olm::SharedKey secret;
_olm_crypto_curve25519_shared_secret(&decryption->key_pair, &ephemeral, secret);
uint8_t raw_mac[MAC_LENGTH];
@@ -352,4 +392,21 @@ size_t olm_pk_decrypt(
}
}
+size_t olm_pk_get_private_key(
+ OlmPkDecryption * decryption,
+ void *private_key, size_t private_key_length
+) {
+ if (private_key_length < olm_pk_private_key_length()) {
+ decryption->last_error =
+ OlmErrorCode::OLM_OUTPUT_BUFFER_TOO_SMALL;
+ return std::size_t(-1);
+ }
+ std::memcpy(
+ private_key,
+ decryption->key_pair.private_key.private_key,
+ olm_pk_private_key_length()
+ );
+ return olm_pk_private_key_length();
+}
+
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-02 19:01:03 +0000