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SSH: public key can now be an empty string

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If an empty string is passed to CURLOPT_SSH_PUBLIC_KEYFILE, libcurl will
pass no public key to libssh2 which then tries to compute it from the
private key. This is known to work when libssh2 1.4.0+ is linked against
OpenSSL.
This commit is contained in:
Armel Asselin 2012-04-01 20:22:37 +02:00 • committed by Daniel Stenberg
parent ebf315e6f3
commit 05a443adf2
2 changed files with 9 additions and 2 deletions
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8
lib/ssh.c
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@ -770,6 +770,7 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
if((data->set.ssh_auth_types & CURLSSH_AUTH_PUBLICKEY) &&
(strstr(sshc->authlist, "publickey") != NULL)) {
char *home = NULL;
bool rsa_pub_empty_but_ok = FALSE;
sshc->rsa_pub = sshc->rsa = NULL;
@ -777,7 +778,10 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
HOME environment variable etc? */
home = curl_getenv("HOME");
if(data->set.str[STRING_SSH_PUBLIC_KEY])
if(data->set.str[STRING_SSH_PUBLIC_KEY] &&
!*data->set.str[STRING_SSH_PUBLIC_KEY])
rsa_pub_empty_but_ok = true;
else if(data->set.str[STRING_SSH_PUBLIC_KEY])
sshc->rsa_pub = aprintf("%s", data->set.str[STRING_SSH_PUBLIC_KEY]);
else if(home)
sshc->rsa_pub = aprintf("%s/.ssh/id_dsa.pub", home);
@ -785,7 +789,7 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
/* as a final resort, try current dir! */
sshc->rsa_pub = strdup("id_dsa.pub");
if(sshc->rsa_pub == NULL) {
if(!rsa_pub_empty_but_ok && (sshc->rsa_pub == NULL)) {
Curl_safefree(home);
state(conn, SSH_SESSION_FREE);
sshc->actualcode = CURLE_OUT_OF_MEMORY;