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client: Receive the banner correctly

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Comply with RFC 4253 compliance section 4.2.

Allow data other than "SSH-" to be sent across prior to the actual
version striong.

Signed-off-by: Ken Reister <reister.kenneth@CIMCOR.COM>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
This commit is contained in:
Ken Reister
2015-10-14 15:50:49 -05:00
committed by Andreas Schneider
parent 32eea120af
commit c3ce3d5cc3
1 changed files with 7 additions and 0 deletions
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7
src/client.c
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@@ -113,6 +113,8 @@ static int callback_receive_banner(const void *data, size_t len, void *user) {
} }
if (buffer[i]=='\n') { if (buffer[i]=='\n') {
buffer[i] = '\0'; buffer[i] = '\0';
/* The server MAY send other lines of data... */
if (strncmp(buffer, "SSH-", 4) == 0) {
str = strdup(buffer); str = strdup(buffer);
if (str == NULL) { if (str == NULL) {
return SSH_ERROR; return SSH_ERROR;
@@ -125,6 +127,11 @@ static int callback_receive_banner(const void *data, size_t len, void *user) {
session->ssh_connection_callback(session); session->ssh_connection_callback(session);
return ret; return ret;
} else {
SSH_LOG(SSH_LOG_DEBUG, "ssh_protocol_version_exchange: %s", buffer);
ret = i + 1;
break;
}
} }
if(i>127){ if(i>127){
/* Too big banner */ /* Too big banner */