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-rw-r--r--fuzzers/fuzz_decrypt.cpp65
1 files changed, 65 insertions, 0 deletions
diff --git a/fuzzers/fuzz_decrypt.cpp b/fuzzers/fuzz_decrypt.cpp
new file mode 100644
index 0000000..0b48060
--- /dev/null
+++ b/fuzzers/fuzz_decrypt.cpp
@@ -0,0 +1,65 @@
+#include "olm/olm.hh"
+
+#include "fuzzing.hh"
+
+int main(int argc, const char *argv[]) {
+ size_t ignored;
+ if (argc <= 3) {
+ const char * message = "Usage: decrypt: <session_key> <session_file>"
+ " <message_type>\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)
+ );
+
+ int message_type = atoi(argv[3]);
+
+ 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_session_size()];
+ OlmSession * session = olm_session(session_memory);
+ check_session(session, "Error unpickling session", olm_unpickle_session(
+ session, key, key_length, session_buffer, session_length
+ ));
+
+ size_t max_length = check_session(
+ session,
+ "Error getting plaintext length",
+ olm_decrypt_max_plaintext_length(
+ session, message_type, tmp_buffer, message_length
+ )
+ );
+
+ uint8_t plaintext[max_length];
+
+ size_t length = check_session(
+ session, "Error decrypting message", olm_decrypt(
+ session, message_type,
+ message_buffer, message_length,
+ plaintext, max_length
+ )
+ );
+
+ ignored = write(STDOUT_FILENO, plaintext, length);
+ ignored = write(STDOUT_FILENO, "\n", 1);
+ return ignored;
+}