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author | Andreas Schneider <asn@cryptomilk.org> | 2012-10-05 10:37:53 +0200 |
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committer | Andreas Schneider <asn@cryptomilk.org> | 2012-10-05 11:12:14 +0200 |
commit | 22f607649d7dc530df84b7b90781ce0b88153095 (patch) | |
tree | be96ff236cf825ccd86f8991d9bd6d9caa850c55 /src/sftp.c | |
parent | b5c4b090da254c1ad3689983b0cb999b09aa3394 (diff) | |
download | libssh-22f607649d7dc530df84b7b90781ce0b88153095.tar.gz libssh-22f607649d7dc530df84b7b90781ce0b88153095.tar.xz libssh-22f607649d7dc530df84b7b90781ce0b88153095.zip |
sftp: Harden sftp_extension_supported() against null pointers.
Diffstat (limited to 'src/sftp.c')
-rw-r--r-- | src/sftp.c | 12 |
1 files changed, 10 insertions, 2 deletions
@@ -622,10 +622,18 @@ int sftp_extension_supported(sftp_session sftp, const char *name, const char *data) { int i, n; + if (sftp == NULL || name == NULL || data == NULL) { + return 0; + } + n = sftp_extensions_get_count(sftp); for (i = 0; i < n; i++) { - if (strcmp(sftp_extensions_get_name(sftp, i), name) == 0 && - strcmp(sftp_extensions_get_data(sftp, i), data) == 0) { + const char *ext_name = sftp_extensions_get_name(sftp, i); + const char *ext_data = sftp_extensions_get_data(sftp, i); + + if (ext_name != NULL && ext_data != NULL && + strcmp(ext_name, name) == 0 && + strcmp(ext_data, data) == 0) { return 1; } } |