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schannel: fix error check logic in get_client_cert() file reader

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Reported by GitHub Code Quality
Follow-up to 0fdf965126 #5193

Closes #22415
This commit is contained in:
Viktor Szakats 2026-07-15 18:04:59 +02:00
parent 75404bda1a
commit 1386135d1c
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1 changed files with 6 additions and 5 deletions
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11
lib/vtls/schannel.c
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@ -441,12 +441,13 @@ static CURLcode get_client_cert(struct Curl_cfilter *cf,
if(fInCert) {
long cert_tell = 0;
bool continue_reading = fseek(fInCert, 0, SEEK_END) == 0;
if(continue_reading)
if(continue_reading) {
cert_tell = ftell(fInCert);
if(cert_tell < 0)
continue_reading = FALSE;
else
certsize = (size_t)cert_tell;
if(cert_tell < 0)
continue_reading = FALSE;
else
certsize = (size_t)cert_tell;
}
if(continue_reading)
continue_reading = fseek(fInCert, 0, SEEK_SET) == 0;
if(continue_reading && (certsize < CURL_MAX_INPUT_LENGTH))