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