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-rw-r--r--plugins/signal-protocol/src/signal_helper.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/plugins/signal-protocol/src/signal_helper.c b/plugins/signal-protocol/src/signal_helper.c
index 21935181..7de934e9 100644
--- a/plugins/signal-protocol/src/signal_helper.c
+++ b/plugins/signal-protocol/src/signal_helper.c
@@ -281,6 +281,7 @@ int signal_vala_decrypt(signal_buffer **output,
void *user_data) {
int algo, mode;
if (aes_cipher(cipher, key_len, &algo, &mode)) return SG_ERR_UNKNOWN;
+ if (ciphertext_len == 0) return SG_ERR_UNKNOWN;
if (iv_len != 16) return SG_ERR_UNKNOWN;
@@ -325,7 +326,7 @@ no_error:
if (pkcs_pad) {
uint8_t pad_len = out_buf[padded_len - 1];
- if (pad_len > 16) goto error;
+ if (pad_len > 16 || pad_len > padded_len) goto error;
*output = signal_buffer_create(out_buf, padded_len - pad_len);
} else {
*output = signal_buffer_create(out_buf, padded_len);