diff options
Diffstat (limited to 'src/util-base64.c')
| -rw-r--r-- | src/util-base64.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/util-base64.c b/src/util-base64.c index 4a4a5d1..d973f0e 100644 --- a/src/util-base64.c +++ b/src/util-base64.c @@ -156,6 +156,8 @@ Base64Ecode DecodeBase64(uint8_t *dest, uint32_t dest_size, const uint8_t *src, ecode = BASE64_ECODE_BUF; break; } + if (dest_size - *decoded_bytes < ASCII_BLOCK) + return BASE64_ECODE_BUF; /* Decode base-64 block into ascii block and move pointer */ DecodeBase64Block(dptr, b64); @@ -183,7 +185,7 @@ Base64Ecode DecodeBase64(uint8_t *dest, uint32_t dest_size, const uint8_t *src, /* if the destination size is not at least 3 Bytes long, it'll give a dynamic * buffer overflow while decoding, so, return and let the caller take care of the * remaining bytes to be decoded which should always be < 4 at this stage */ - if (dest_size - *decoded_bytes < 3) + if (dest_size - *decoded_bytes < ASCII_BLOCK) return BASE64_ECODE_BUF; *decoded_bytes += numDecoded_blk; DecodeBase64Block(dptr, b64); @@ -193,6 +195,8 @@ Base64Ecode DecodeBase64(uint8_t *dest, uint32_t dest_size, const uint8_t *src, /* Finish remaining b64 bytes by padding */ if (valid && bbidx > 0 && (mode != BASE64_MODE_RFC2045)) { /* Decode remaining */ + if (dest_size - *decoded_bytes < ASCII_BLOCK) + return BASE64_ECODE_BUF; *decoded_bytes += ASCII_BLOCK - (B64_BLOCK - bbidx); DecodeBase64Block(dptr, b64); } |