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_libssh2_check_length() : additional bounds check (#348)

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Misc.c : _libssh2_check_length()

Ensure the requested length is less than the total length before doing the additional bounds check
This commit is contained in:
Will Cosgrove
2019-04-01 13:30:50 -07:00
committed by GitHub
parent 38bf7ce9ec
commit c07bc647f2
1 changed files with 3 additions and 0 deletions
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3
src/misc.c
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@@ -811,6 +811,9 @@ int _libssh2_get_bignum_bytes(struct string_buf *buf, unsigned char **outbuf)
int _libssh2_check_length(struct string_buf *buf, size_t len) int _libssh2_check_length(struct string_buf *buf, size_t len)
{ {
if(len > buf->len)
return 0;
return ((int)(buf->dataptr - buf->data) <= (int)(buf->len - len)) ? 1 : 0; return ((int)(buf->dataptr - buf->data) <= (int)(buf->len - len)) ? 1 : 0;
} }