diff options
| -rw-r--r-- | src/openssl.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/src/openssl.c b/src/openssl.c index 66a6168..4ca8da7 100644 --- a/src/openssl.c +++ b/src/openssl.c @@ -29,7 +29,7 @@ #include <strings.h> /* strcasecmp(3) */ #include <math.h> /* INFINITY fabs(3) floor(3) frexp(3) fmod(3) round(3) isfinite(3) */ #include <time.h> /* struct tm time_t strptime(3) time(2) */ -#include <ctype.h> /* tolower(3) */ +#include <ctype.h> /* isdigit(3), isxdigit(3), tolower(3) */ #include <errno.h> /* ENOMEM ENOTSUP EOVERFLOW errno */ #include <assert.h> /* assert */ @@ -1685,7 +1685,7 @@ static _Bool f2bn(BIGNUM **bn, double f) { static BIGNUM *(checkbig)(lua_State *L, int index, _Bool *lvalue) { BIGNUM **bn; const char *str; - size_t len; + size_t len, i; _Bool neg, hex = 0; index = lua_absindex(L, index); @@ -1702,6 +1702,15 @@ static BIGNUM *(checkbig)(lua_State *L, int index, _Bool *lvalue) { if (str[neg] == '0' && (str[neg+1] == 'x' || str[neg+1] == 'X')) { hex = 1; + for (i = 2+neg; i < len; i++) { + if (!isxdigit(str[i])) + luaL_argerror(L, 1, "invalid hex string"); + } + } else { + for (i = neg; i < len; i++) { + if (!isdigit(str[i])) + luaL_argerror(L, 1, "invalid decimal string"); + } } bn = prepsimple(L, BIGNUM_CLASS); |