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sectransp: check for client certs by name first, then file

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CVE-2021-22926

Bug: https://curl.se/docs/CVE-2021-22926.html

Assisted-by: Daniel Gustafsson
Reported-by: Harry Sintonen
This commit is contained in:
Daniel Stenberg 2021-06-21 10:35:09 +02:00
parent 894f6ec730
commit fd9b40bf8d
No known key found for this signature in database
GPG Key ID: 5CC908FDB71E12C2
1 changed files with 19 additions and 14 deletions
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33
lib/vtls/sectransp.c
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@ -32,6 +32,7 @@
#include "curl_base64.h"
#include "strtok.h"
#include "multiif.h"
#include "strcase.h"
#ifdef USE_SECTRANSP
@ -1869,24 +1870,28 @@ static CURLcode sectransp_connect_step1(struct Curl_easy *data,
bool is_cert_file = (!is_cert_data) && is_file(ssl_cert);
SecIdentityRef cert_and_key = NULL;
/* User wants to authenticate with a client cert. Look for it:
If we detect that this is a file on disk, then let's load it.
Otherwise, assume that the user wants to use an identity loaded
from the Keychain. */
if(is_cert_file || is_cert_data) {
/* User wants to authenticate with a client cert. Look for it. Assume that
the user wants to use an identity loaded from the Keychain. If not, try
it as a file on disk */
if(!is_cert_data)
err = CopyIdentityWithLabel(ssl_cert, &cert_and_key);
else
err = !noErr;
if((err != noErr) && (is_cert_file || is_cert_data)) {
if(!SSL_SET_OPTION(cert_type))
infof(data, "WARNING: SSL: Certificate type not set, assuming "
"PKCS#12 format.");
else if(strncmp(SSL_SET_OPTION(cert_type), "P12",
strlen(SSL_SET_OPTION(cert_type))) != 0)
infof(data, "WARNING: SSL: The Security framework only supports "
"loading identities that are in PKCS#12 format.");
infof(data, "SSL: Certificate type not set, assuming "
"PKCS#12 format.");
else if(!strcasecompare(SSL_SET_OPTION(cert_type), "P12")) {
failf(data, "SSL: The Security framework only supports "
"loading identities that are in PKCS#12 format.");
return CURLE_SSL_CERTPROBLEM;
}
err = CopyIdentityFromPKCS12File(ssl_cert, ssl_cert_blob,
SSL_SET_OPTION(key_passwd), &cert_and_key);
SSL_SET_OPTION(key_passwd),
&cert_and_key);
}
else
err = CopyIdentityWithLabel(ssl_cert, &cert_and_key);
if(err == noErr && cert_and_key) {
SecCertificateRef cert = NULL;