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Added the keyboard-interactive authentication method

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This commit is contained in:
milo
2011-02-08 00:40:18 +01:00
parent 32e23a25da
commit 3c0a4781e4
9 changed files with 363 additions and 17 deletions
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60
src/auth.c
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@@ -1275,16 +1275,7 @@ int ssh_userauth_autopubkey(ssh_session session, const char *passphrase) {
return SSH_AUTH_DENIED;
}
struct ssh_kbdint_struct {
uint32_t nprompts;
char *name;
char *instruction;
char **prompts;
unsigned char *echo; /* bool array */
char **answers;
};
static ssh_kbdint kbdint_new(void) {
ssh_kbdint kbdint_new(void) {
ssh_kbdint kbd;
kbd = malloc(sizeof (struct ssh_kbdint_struct));
@@ -1297,19 +1288,19 @@ static ssh_kbdint kbdint_new(void) {
}
static void kbdint_free(ssh_kbdint kbd) {
void kbdint_free(ssh_kbdint kbd) {
int i, n;
if (kbd == NULL) {
return;
}
n = kbd->nprompts;
SAFE_FREE(kbd->name);
SAFE_FREE(kbd->instruction);
SAFE_FREE(kbd->echo);
n = kbd->nprompts;
if (kbd->prompts) {
for (i = 0; i < n; i++) {
BURN_STRING(kbd->prompts[i]);
@@ -1317,6 +1308,8 @@ static void kbdint_free(ssh_kbdint kbd) {
}
SAFE_FREE(kbd->prompts);
}
n = kbd->nanswers;
if (kbd->answers) {
for (i = 0; i < n; i++) {
BURN_STRING(kbd->answers[i]);
@@ -1328,19 +1321,18 @@ static void kbdint_free(ssh_kbdint kbd) {
SAFE_FREE(kbd);
}
static void kbdint_clean(ssh_kbdint kbd) {
void kbdint_clean(ssh_kbdint kbd) {
int i, n;
if (kbd == NULL) {
return;
}
n = kbd->nprompts;
SAFE_FREE(kbd->name);
SAFE_FREE(kbd->instruction);
SAFE_FREE(kbd->echo);
n = kbd->nprompts;
if (kbd->prompts) {
for (i = 0; i < n; i++) {
BURN_STRING(kbd->prompts[i]);
@@ -1349,6 +1341,8 @@ static void kbdint_clean(ssh_kbdint kbd) {
SAFE_FREE(kbd->prompts);
}
n = kbd->nanswers;
if (kbd->answers) {
for (i = 0; i < n; i++) {
BURN_STRING(kbd->answers[i]);
@@ -1358,6 +1352,7 @@ static void kbdint_clean(ssh_kbdint kbd) {
}
kbd->nprompts = 0;
kbd->nanswers = 0;
}
/* this function sends the first packet as explained in section 3.1
@@ -1535,6 +1530,7 @@ SSH_PACKET_CALLBACK(ssh_packet_userauth_info_request) {
ssh_string_free(tmp);
if (session->kbdint->prompts[i] == NULL) {
ssh_set_error_oom(session);
session->kbdint->nprompts = i;
kbdint_free(session->kbdint);
session->kbdint = NULL;
leave_function();
@@ -1757,6 +1753,40 @@ const char *ssh_userauth_kbdint_getprompt(ssh_session session, unsigned int i,
return session->kbdint->prompts[i];
}
#ifdef WITH_SERVER
/**
* @brief Get the number of answers the client has given.
*
* @param[in] session The ssh session to use.
*
* @returns The number of answers.
*/
int ssh_userauth_kbdint_getnanswers(ssh_session session) {
if(session==NULL || session->kbdint == NULL)
return SSH_ERROR;
return session->kbdint->nanswers;
}
/**
* @brief Get the answer for a question from a message block.
*
* @param[in] session The ssh session to use.
*
* @param[in] i index The number of the ith answer.
*
* @return 0 on success, < 0 on error.
*/
const char *ssh_userauth_kbdint_getanswer(ssh_session session, unsigned int i) {
if(session==NULL || session->kbdint == NULL)
return NULL;
if (i > session->kbdint->nanswers) {
return NULL;
}
return session->kbdint->answers[i];
}
#endif
/**
* @brief Set the answer for a question from a message block.
*