/** Print data as base64, not as VALUE
*
*/
static size_t xlat_base64(UNUSED void *instance, REQUEST *request,
const char *fmt, char *out, size_t outlen)
{
VALUE_PAIR *vp;
uint8_t buffer[MAX_STRING_LEN];
ssize_t ret;
while (isspace((int) *fmt)) fmt++;
if ((radius_get_vp(request, fmt, &vp) < 0) || !vp) {
*out = '\0';
return 0;
}
ret = rad_vp2data(vp, buffer, sizeof(buffer));
if (ret < 0) {
*out = 0;
return 0;
}
return fr_base64_encode(buffer, (size_t) ret, out, outlen);
}
/**
* @brief Print data as base64, not as VALUE
*/
static size_t xlat_base64(UNUSED void *instance, REQUEST *request,
char *fmt, char *out, size_t outlen,
UNUSED RADIUS_ESCAPE_STRING func)
{
VALUE_PAIR *vp;
uint8_t buffer[MAX_STRING_LEN];
ssize_t ret;
size_t len;
size_t enc;
while (isspace((int) *fmt)) fmt++;
if (!radius_get_vp(request, fmt, &vp) || !vp) {
*out = '\0';
return 0;
}
ret = rad_vp2data(vp, buffer, sizeof(buffer));
if (ret < 0) {
*out = 0;
return 0;
}
len = (size_t) ret;
enc = FR_BASE64_ENC_LENGTH(len);
/*
* Don't truncate the data.
*/
if (outlen < (enc + 1)) {
*out = 0;
return 0;
}
fr_base64_encode(buffer, len, out, outlen);
return enc;
}
/** Encode string or attribute as base64
*
* Example: "%{base64:foo}" == "Zm9v"
*/
static ssize_t base64_xlat(UNUSED void *instance, UNUSED REQUEST *request,
char const *fmt, char *out, size_t outlen)
{
ssize_t inlen;
uint8_t const *p;
inlen = xlat_fmt_to_ref(&p, request, fmt);
if (inlen < 0) {
return -1;
}
/*
* We can accurately calculate the length of the output string
* if it's larger than outlen, the output would be useless so abort.
*/
if ((inlen < 0) || ((FR_BASE64_ENC_LENGTH(inlen) + 1) > (ssize_t) outlen)) {
REDEBUG("xlat failed");
*out = '\0';
return -1;
}
return fr_base64_encode(out, outlen, p, inlen);
}
/**
* @brief Encode string as base64
*
* Example: "%{tobase64:foo}" == "Zm9v"
*/
static size_t base64_xlat(UNUSED void *instance, REQUEST *request,
char *fmt, char *out, size_t outlen,
UNUSED RADIUS_ESCAPE_STRING func)
{
size_t len;
char buffer[1024];
len = radius_xlat(buffer, sizeof(buffer), fmt, request, func);
/*
* We can accurately calculate the length of the output string
* if it's larger than outlen, the output would be useless so abort.
*/
if (!len || ((FR_BASE64_ENC_LENGTH(len) + 1) > outlen)) {
radlog(L_ERR, "rlm_expr: xlat failed.");
*out = '\0';
return 0;
}
fr_base64_encode((uint8_t *) buffer, len, out, outlen);
return strlen(out);
}
