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fix memory leak in openssl.c

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This commit is contained in:
Tim Rühsen 2014-10-29 16:36:18 +01:00
parent 9dd6ea7481
commit a6c2ba73d9
2 changed files with 39 additions and 5 deletions
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10
src/ChangeLog
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@ -3,6 +3,16 @@
* openssl.c (ssl_init) [! OPENSSL_NO_SSL3]: Add guard for OpenSSL
without SSLv3.
2014-10-29 Tim Ruehsen <tim.ruehsen@gmx.de>
* openssl.c: print cert subject and issuer RFC2253 compliant
* openssl.c (ssl_check_certificate): removed memory leak
2014-10-28 Tim Ruehsen <tim.ruehsen@gmx.de>
* utils.c: added strlcpy(), concat_strings() rewritten
* utils.h: added strlcpy()
2014-10-28 Tim Ruehsen <tim.ruehsen@gmx.de>
* ftp.c (ftp_loop_internal): Fix memory leak

34
src/openssl.c
View File

@ -40,6 +40,7 @@ as that of the covered work. */
#include <openssl/x509v3.h>
#include <openssl/err.h>
#include <openssl/rand.h>
#include <openssl/bio.h>
#if OPENSSL_VERSION_NUMBER >= 0x00907000
#include <openssl/conf.h>
#endif
@ -572,6 +573,27 @@ pattern_match (const char *pattern, const char *string)
return *n == '\0';
}
char *_get_rfc2253_formatted (X509_NAME *name)
{
int len;
char *out = NULL;
BIO* b;
if ((b = BIO_new (BIO_s_mem ())))
{
if (X509_NAME_print_ex (b, name, 0, XN_FLAG_RFC2253) >= 0
&& (len = BIO_number_written (b)) > 0)
{
out = xmalloc (len + 1);
BIO_read (b, out, len);
out[len] = 0;
}
BIO_free (b);
}
return out ? out : xstrdup("");
}
/* Verify the validity of the certificate presented by the server.
Also check that the "common name" of the server, as presented by
its certificate, corresponds to HOST. (HOST typically comes from
@ -615,23 +637,25 @@ ssl_check_certificate (int fd, const char *host)
IF_DEBUG
{
char *subject = X509_NAME_oneline (X509_get_subject_name (cert), 0, 0);
char *issuer = X509_NAME_oneline (X509_get_issuer_name (cert), 0, 0);
char *subject = _get_rfc2253_formatted (X509_get_subject_name (cert));
char *issuer = _get_rfc2253_formatted (X509_get_issuer_name (cert));
DEBUGP (("certificate:\n subject: %s\n issuer: %s\n",
quotearg_n_style (0, escape_quoting_style, subject),
quotearg_n_style (1, escape_quoting_style, issuer)));
OPENSSL_free (subject);
OPENSSL_free (issuer);
xfree (subject);
xfree (issuer);
}
vresult = SSL_get_verify_result (conn);
if (vresult != X509_V_OK)
{
char *issuer = X509_NAME_oneline (X509_get_issuer_name (cert), 0, 0);
char *issuer = _get_rfc2253_formatted (X509_get_issuer_name (cert));
logprintf (LOG_NOTQUIET,
_("%s: cannot verify %s's certificate, issued by %s:\n"),
severity, quotearg_n_style (0, escape_quoting_style, host),
quote_n (1, issuer));
xfree(issuer);
/* Try to print more user-friendly (and translated) messages for
the frequent verification errors. */
switch (vresult)