73 lines
2 KiB
C++
73 lines
2 KiB
C++
#include "olm/olm.hh"
|
|
|
|
#include "fuzzing.hh"
|
|
|
|
int main(int argc, const char *argv[]) {
|
|
size_t ignored;
|
|
if (argc <= 2) {
|
|
const char * message = "Usage: decrypt <pickle_key> <group_session>\n";
|
|
ignored = write(STDERR_FILENO, message, strlen(message));
|
|
exit(3);
|
|
}
|
|
|
|
const char * key = argv[1];
|
|
size_t key_length = strlen(key);
|
|
|
|
|
|
int session_fd = check_errno(
|
|
"Error opening session file", open(argv[2], O_RDONLY)
|
|
);
|
|
|
|
uint8_t *session_buffer;
|
|
ssize_t session_length = check_errno(
|
|
"Error reading session file", read_file(session_fd, &session_buffer)
|
|
);
|
|
|
|
int message_fd = STDIN_FILENO;
|
|
uint8_t * message_buffer;
|
|
ssize_t message_length = check_errno(
|
|
"Error reading message file", read_file(message_fd, &message_buffer)
|
|
);
|
|
|
|
uint8_t * tmp_buffer = (uint8_t *) malloc(message_length);
|
|
memcpy(tmp_buffer, message_buffer, message_length);
|
|
|
|
uint8_t session_memory[olm_inbound_group_session_size()];
|
|
OlmInboundGroupSession * session = olm_inbound_group_session(session_memory);
|
|
check_error(
|
|
olm_inbound_group_session_last_error,
|
|
session,
|
|
"Error unpickling session",
|
|
olm_unpickle_inbound_group_session(
|
|
session, key, key_length, session_buffer, session_length
|
|
)
|
|
);
|
|
|
|
size_t max_length = check_error(
|
|
olm_inbound_group_session_last_error,
|
|
session,
|
|
"Error getting plaintext length",
|
|
olm_group_decrypt_max_plaintext_length(
|
|
session, tmp_buffer, message_length
|
|
)
|
|
);
|
|
|
|
uint8_t plaintext[max_length];
|
|
|
|
uint32_t ratchet_index;
|
|
|
|
size_t length = check_error(
|
|
olm_inbound_group_session_last_error,
|
|
session,
|
|
"Error decrypting message",
|
|
olm_group_decrypt(
|
|
session,
|
|
message_buffer, message_length,
|
|
plaintext, max_length, &ratchet_index
|
|
)
|
|
);
|
|
|
|
ignored = write(STDOUT_FILENO, plaintext, length);
|
|
ignored = write(STDOUT_FILENO, "\n", 1);
|
|
return ignored;
|
|
}
|