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crypto/x509: fix value ownership in isSSLPolicy on macOS

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CFDictionaryGetValueIfPresent does not take ownership of the value, so
releasing the properties dictionary before passing the value to CFEqual
can crash. Not really clear why this works most of the time.

See https://developer.apple.com/library/archive/documentation/CoreFoundation/Conceptual/CFMemoryMgmt/Concepts/Ownership.html

Fixes #28092
Hopefully fixes #30763

Change-Id: I5ee7ca276b753a48abc3aedfb78b8af68b448dd4
Reviewed-on: https://go-review.googlesource.com/c/go/+/178537
Reviewed-by: Adam Langley <agl@golang.org>
This commit is contained in:
Filippo Valsorda 2019-05-21 14:54:54 -04:00
parent 06b0babf31
commit a3d4655c24
1 changed files with 4 additions and 4 deletions
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8
src/crypto/x509/root_cgo_darwin.go
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@ -16,7 +16,7 @@ package x509
#include <CoreFoundation/CoreFoundation.h>
#include <Security/Security.h>
static bool isSSLPolicy(SecPolicyRef policyRef) {
static Boolean isSSLPolicy(SecPolicyRef policyRef) {
if (!policyRef) {
return false;
}
@ -24,13 +24,13 @@ static bool isSSLPolicy(SecPolicyRef policyRef) {
if (properties == NULL) {
return false;
}
Boolean isSSL = false;
CFTypeRef value = NULL;
if (CFDictionaryGetValueIfPresent(properties, kSecPolicyOid, (const void **)&value)) {
CFRelease(properties);
return CFEqual(value, kSecPolicyAppleSSL);
isSSL = CFEqual(value, kSecPolicyAppleSSL);
}
CFRelease(properties);
return false;
return isSSL;
}
// sslTrustSettingsResult obtains the final kSecTrustSettingsResult value