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Avoid buffer overflow if one protocol string is too long, but at least

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one is not.

Also add log messages numbers and avoid useless string dup.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1345599 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Stefan Fritsch
2012-06-02 22:28:26 +00:00
parent ea690c5e6f
commit 41cd334ad6
3 changed files with 6 additions and 5 deletions
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4
modules/ssl/ssl_engine_kernel.c
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@@ -2189,7 +2189,7 @@ int ssl_callback_AdvertiseNextProtos(SSL *ssl, const unsigned char **data_out,
/* If the protocol name is too long (the length must fit in one byte),
* then log an error and skip it. */
if (length > 255) {
ap_log_cerror(APLOG_MARK, APLOG_ERR, 0, c,
ap_log_cerror(APLOG_MARK, APLOG_ERR, 0, c, APLOGNO(02307)
"SSL NPN protocol name too long (length=%u): %s",
length, string);
continue;
@@ -2213,6 +2213,8 @@ int ssl_callback_AdvertiseNextProtos(SSL *ssl, const unsigned char **data_out,
for (i = 0; i < num_protos; ++i) {
const char *string = APR_ARRAY_IDX(protos, i, const char*);
apr_size_t length = strlen(string);
if (length > 255)
continue;
*start = (unsigned char)length;
++start;
memcpy(start, string, length * sizeof(unsigned char));