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Diffstat (limited to 'plugins/signal-protocol/src/signal_helper.c')
-rw-r--r--plugins/signal-protocol/src/signal_helper.c377
1 files changed, 0 insertions, 377 deletions
diff --git a/plugins/signal-protocol/src/signal_helper.c b/plugins/signal-protocol/src/signal_helper.c
deleted file mode 100644
index 1a428c44..00000000
--- a/plugins/signal-protocol/src/signal_helper.c
+++ /dev/null
@@ -1,377 +0,0 @@
-#include <signal_helper.h>
-
-#include <gcrypt.h>
-
-signal_type_base* signal_type_ref_vapi(void* instance) {
- g_return_val_if_fail(instance != NULL, NULL);
- signal_type_ref(instance);
- return instance;
-}
-
-signal_type_base* signal_type_unref_vapi(void* instance) {
- g_return_val_if_fail(instance != NULL, NULL);
- signal_type_unref(instance);
- return NULL;
-}
-
-signal_protocol_address* signal_protocol_address_new(const gchar* name, int32_t device_id) {
- g_return_val_if_fail(name != NULL, NULL);
- signal_protocol_address* address = malloc(sizeof(signal_protocol_address));
- address->device_id = -1;
- address->name = NULL;
- signal_protocol_address_set_name(address, name);
- signal_protocol_address_set_device_id(address, device_id);
- return address;
-}
-
-void signal_protocol_address_free(signal_protocol_address* ptr) {
- g_return_if_fail(ptr != NULL);
- if (ptr->name) {
- g_free((void*)ptr->name);
- }
- return free(ptr);
-}
-
-void signal_protocol_address_set_name(signal_protocol_address* self, const gchar* name) {
- g_return_if_fail(self != NULL);
- g_return_if_fail(name != NULL);
- gchar* n = g_malloc(strlen(name)+1);
- memcpy(n, name, strlen(name));
- n[strlen(name)] = 0;
- if (self->name) {
- g_free((void*)self->name);
- }
- self->name = n;
- self->name_len = strlen(n);
-}
-
-gchar* signal_protocol_address_get_name(signal_protocol_address* self) {
- g_return_val_if_fail(self != NULL, NULL);
- g_return_val_if_fail(self->name != NULL, 0);
- gchar* res = g_malloc(sizeof(char) * (self->name_len + 1));
- memcpy(res, self->name, self->name_len);
- res[self->name_len] = 0;
- return res;
-}
-
-int32_t signal_protocol_address_get_device_id(signal_protocol_address* self) {
- g_return_val_if_fail(self != NULL, -1);
- return self->device_id;
-}
-
-void signal_protocol_address_set_device_id(signal_protocol_address* self, int32_t device_id) {
- g_return_if_fail(self != NULL);
- self->device_id = device_id;
-}
-
-int signal_vala_randomize(uint8_t *data, size_t len) {
- gcry_randomize(data, len, GCRY_STRONG_RANDOM);
- return SG_SUCCESS;
-}
-
-int signal_vala_random_generator(uint8_t *data, size_t len, void *user_data) {
- gcry_randomize(data, len, GCRY_STRONG_RANDOM);
- return SG_SUCCESS;
-}
-
-int signal_vala_hmac_sha256_init(void **hmac_context, const uint8_t *key, size_t key_len, void *user_data) {
- gcry_mac_hd_t* ctx = malloc(sizeof(gcry_mac_hd_t));
- if (!ctx) return SG_ERR_NOMEM;
-
- if (gcry_mac_open(ctx, GCRY_MAC_HMAC_SHA256, 0, 0)) {
- free(ctx);
- return SG_ERR_UNKNOWN;
- }
-
- if (gcry_mac_setkey(*ctx, key, key_len)) {
- free(ctx);
- return SG_ERR_UNKNOWN;
- }
-
- *hmac_context = ctx;
-
- return SG_SUCCESS;
-}
-
-int signal_vala_hmac_sha256_update(void *hmac_context, const uint8_t *data, size_t data_len, void *user_data) {
- gcry_mac_hd_t* ctx = hmac_context;
-
- if (gcry_mac_write(*ctx, data, data_len)) return SG_ERR_UNKNOWN;
-
- return SG_SUCCESS;
-}
-
-int signal_vala_hmac_sha256_final(void *hmac_context, signal_buffer **output, void *user_data) {
- size_t len = gcry_mac_get_algo_maclen(GCRY_MAC_HMAC_SHA256);
- uint8_t md[len];
- gcry_mac_hd_t* ctx = hmac_context;
-
- if (gcry_mac_read(*ctx, md, &len)) return SG_ERR_UNKNOWN;
-
- signal_buffer *output_buffer = signal_buffer_create(md, len);
- if (!output_buffer) return SG_ERR_NOMEM;
-
- *output = output_buffer;
-
- return SG_SUCCESS;
-}
-
-void signal_vala_hmac_sha256_cleanup(void *hmac_context, void *user_data) {
- gcry_mac_hd_t* ctx = hmac_context;
- if (ctx) {
- gcry_mac_close(*ctx);
- free(ctx);
- }
-}
-
-int signal_vala_sha512_digest_init(void **digest_context, void *user_data) {
- gcry_md_hd_t* ctx = malloc(sizeof(gcry_mac_hd_t));
- if (!ctx) return SG_ERR_NOMEM;
-
- if (gcry_md_open(ctx, GCRY_MD_SHA512, 0)) {
- free(ctx);
- return SG_ERR_UNKNOWN;
- }
-
- *digest_context = ctx;
-
- return SG_SUCCESS;
-}
-
-int signal_vala_sha512_digest_update(void *digest_context, const uint8_t *data, size_t data_len, void *user_data) {
- gcry_md_hd_t* ctx = digest_context;
-
- gcry_md_write(*ctx, data, data_len);
-
- return SG_SUCCESS;
-}
-
-int signal_vala_sha512_digest_final(void *digest_context, signal_buffer **output, void *user_data) {
- size_t len = gcry_md_get_algo_dlen(GCRY_MD_SHA512);
- gcry_md_hd_t* ctx = digest_context;
-
- uint8_t* md = gcry_md_read(*ctx, GCRY_MD_SHA512);
- if (!md) return SG_ERR_UNKNOWN;
-
- gcry_md_reset(*ctx);
-
- signal_buffer *output_buffer = signal_buffer_create(md, len);
- free(md);
- if (!output_buffer) return SG_ERR_NOMEM;
-
- *output = output_buffer;
-
- return SG_SUCCESS;
-}
-
-void signal_vala_sha512_digest_cleanup(void *digest_context, void *user_data) {
- gcry_md_hd_t* ctx = digest_context;
- if (ctx) {
- gcry_md_close(*ctx);
- free(ctx);
- }
-}
-
-const int aes_cipher(int cipher, size_t key_len, int* algo, int* mode) {
- switch (key_len) {
- case 16:
- *algo = GCRY_CIPHER_AES128;
- break;
- case 24:
- *algo = GCRY_CIPHER_AES192;
- break;
- case 32:
- *algo = GCRY_CIPHER_AES256;
- break;
- default:
- return SG_ERR_UNKNOWN;
- }
- switch (cipher) {
- case SG_CIPHER_AES_CBC_PKCS5:
- *mode = GCRY_CIPHER_MODE_CBC;
- break;
- case SG_CIPHER_AES_CTR_NOPADDING:
- *mode = GCRY_CIPHER_MODE_CTR;
- break;
- case SG_CIPHER_AES_GCM_NOPADDING:
- *mode = GCRY_CIPHER_MODE_GCM;
- break;
- default:
- return SG_ERR_UNKNOWN;
- }
- return SG_SUCCESS;
-}
-
-int signal_vala_encrypt(signal_buffer **output,
- int cipher,
- const uint8_t *key, size_t key_len,
- const uint8_t *iv, size_t iv_len,
- const uint8_t *plaintext, size_t plaintext_len,
- void *user_data) {
- int algo, mode, error_code = SG_ERR_UNKNOWN;
- if (aes_cipher(cipher, key_len, &algo, &mode)) return SG_ERR_INVAL;
-
- gcry_cipher_hd_t ctx = {0};
-
- if (gcry_cipher_open(&ctx, algo, mode, 0)) return SG_ERR_NOMEM;
-
- signal_buffer* padded = 0;
- signal_buffer* out_buf = 0;
- goto no_error;
-error:
- gcry_cipher_close(ctx);
- if (padded != 0) {
- signal_buffer_bzero_free(padded);
- }
- if (out_buf != 0) {
- signal_buffer_free(out_buf);
- }
- return error_code;
-no_error:
-
- if (gcry_cipher_setkey(ctx, key, key_len)) goto error;
-
- uint8_t tag_len = 0, pad_len = 0;
- switch (cipher) {
- case SG_CIPHER_AES_CBC_PKCS5:
- if (gcry_cipher_setiv(ctx, iv, iv_len)) goto error;
- pad_len = 16 - (plaintext_len % 16);
- if (pad_len == 0) pad_len = 16;
- break;
- case SG_CIPHER_AES_CTR_NOPADDING:
- if (gcry_cipher_setctr(ctx, iv, iv_len)) goto error;
- break;
- case SG_CIPHER_AES_GCM_NOPADDING:
- if (gcry_cipher_setiv(ctx, iv, iv_len)) goto error;
- tag_len = 16;
- break;
- default:
- return SG_ERR_UNKNOWN;
- }
-
- size_t padded_len = plaintext_len + pad_len;
- padded = signal_buffer_alloc(padded_len);
- if (padded == 0) {
- error_code = SG_ERR_NOMEM;
- goto error;
- }
-
- memset(signal_buffer_data(padded) + plaintext_len, pad_len, pad_len);
- memcpy(signal_buffer_data(padded), plaintext, plaintext_len);
-
- out_buf = signal_buffer_alloc(padded_len + tag_len);
- if (out_buf == 0) {
- error_code = SG_ERR_NOMEM;
- goto error;
- }
-
- if (gcry_cipher_encrypt(ctx, signal_buffer_data(out_buf), padded_len, signal_buffer_data(padded), padded_len)) goto error;
-
- if (tag_len > 0) {
- if (gcry_cipher_gettag(ctx, signal_buffer_data(out_buf) + padded_len, tag_len)) goto error;
- }
-
- *output = out_buf;
- out_buf = 0;
-
- signal_buffer_bzero_free(padded);
- padded = 0;
-
- gcry_cipher_close(ctx);
- return SG_SUCCESS;
-}
-
-int signal_vala_decrypt(signal_buffer **output,
- int cipher,
- const uint8_t *key, size_t key_len,
- const uint8_t *iv, size_t iv_len,
- const uint8_t *ciphertext, size_t ciphertext_len,
- void *user_data) {
- int algo, mode, error_code = SG_ERR_UNKNOWN;
- *output = 0;
- if (aes_cipher(cipher, key_len, &algo, &mode)) return SG_ERR_INVAL;
- if (ciphertext_len == 0) return SG_ERR_INVAL;
-
- gcry_cipher_hd_t ctx = {0};
-
- if (gcry_cipher_open(&ctx, algo, mode, 0)) return SG_ERR_NOMEM;
-
- signal_buffer* out_buf = 0;
- goto no_error;
-error:
- gcry_cipher_close(ctx);
- if (out_buf != 0) {
- signal_buffer_bzero_free(out_buf);
- }
- return error_code;
-no_error:
-
- if (gcry_cipher_setkey(ctx, key, key_len)) goto error;
-
- uint8_t tag_len = 0, pkcs_pad = FALSE;
- switch (cipher) {
- case SG_CIPHER_AES_CBC_PKCS5:
- if (gcry_cipher_setiv(ctx, iv, iv_len)) goto error;
- pkcs_pad = TRUE;
- break;
- case SG_CIPHER_AES_CTR_NOPADDING:
- if (gcry_cipher_setctr(ctx, iv, iv_len)) goto error;
- break;
- case SG_CIPHER_AES_GCM_NOPADDING:
- if (gcry_cipher_setiv(ctx, iv, iv_len)) goto error;
- if (ciphertext_len < 16) goto error;
- tag_len = 16;
- break;
- default:
- goto error;
- }
-
- size_t padded_len = ciphertext_len - tag_len;
- out_buf = signal_buffer_alloc(padded_len);
- if (out_buf == 0) {
- error_code = SG_ERR_NOMEM;
- goto error;
- }
-
- if (gcry_cipher_decrypt(ctx, signal_buffer_data(out_buf), signal_buffer_len(out_buf), ciphertext, padded_len)) goto error;
-
- if (tag_len > 0) {
- if (gcry_cipher_checktag(ctx, ciphertext + padded_len, tag_len)) goto error;
- }
-
- if (pkcs_pad) {
- uint8_t pad_len = signal_buffer_data(out_buf)[padded_len - 1];
- if (pad_len > 16 || pad_len > padded_len) goto error;
- *output = signal_buffer_create(signal_buffer_data(out_buf), padded_len - pad_len);
- signal_buffer_bzero_free(out_buf);
- out_buf = 0;
- } else {
- *output = out_buf;
- out_buf = 0;
- }
-
- gcry_cipher_close(ctx);
- return SG_SUCCESS;
-}
-
-void setup_signal_vala_crypto_provider(signal_context *context)
-{
- gcry_check_version(NULL);
-
- signal_crypto_provider provider = {
- .random_func = signal_vala_random_generator,
- .hmac_sha256_init_func = signal_vala_hmac_sha256_init,
- .hmac_sha256_update_func = signal_vala_hmac_sha256_update,
- .hmac_sha256_final_func = signal_vala_hmac_sha256_final,
- .hmac_sha256_cleanup_func = signal_vala_hmac_sha256_cleanup,
- .sha512_digest_init_func = signal_vala_sha512_digest_init,
- .sha512_digest_update_func = signal_vala_sha512_digest_update,
- .sha512_digest_final_func = signal_vala_sha512_digest_final,
- .sha512_digest_cleanup_func = signal_vala_sha512_digest_cleanup,
- .encrypt_func = signal_vala_encrypt,
- .decrypt_func = signal_vala_decrypt,
- .user_data = 0
- };
-
- signal_context_set_crypto_provider(context, &provider);
-}
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