/*
* Authenticate to the server with the Challenge-Response Authentication
* Mechanism (CRAM). The authentication type associated with CRAM is
* "CRAM-MD5".
*/
int
auth_cram_md5(session *ssn, const char *user, const char *pass)
{
int t;
size_t n;
unsigned int i;
unsigned char *chal, *resp, *out, *buf;
unsigned char md[EVP_MAX_MD_SIZE], mdhex[EVP_MAX_MD_SIZE * 2 + 1];
unsigned int mdlen;
HMAC_CTX hmac;
if ((t = imap_authenticate(ssn, "CRAM-MD5")) == -1)
return -1;
if (response_authenticate(ssn, t, &chal) ==
STATUS_RESPONSE_CONTINUE) {
n = strlen((char *)(chal)) * 3 / 4 + 1;
resp = (unsigned char *)xmalloc(n * sizeof(char));
memset(resp, 0, n);
EVP_DecodeBlock(resp, chal, strlen((char *)(chal)));
HMAC_Init(&hmac, (const unsigned char *)pass, strlen(pass),
EVP_md5());
HMAC_Update(&hmac, resp, strlen((char *)(resp)));
HMAC_Final(&hmac, md, &mdlen);
xfree(chal);
xfree(resp);
for (i = 0; i < mdlen; i++)
snprintf((char *)(mdhex) + i * 2, mdlen * 2 - i * 2 + 1,
"%02x", md[i]);
mdhex[mdlen * 2] = '\0';
n = strlen(user) + 1 + strlen((char *)(mdhex)) + 1;
buf = (unsigned char *)xmalloc(n * sizeof(unsigned char));
memset(buf, 0, n);
snprintf((char *)(buf), n, "%s %s", user, mdhex);
n = (strlen((char *)(buf)) + 3) * 4 / 3 + 1;
out = (unsigned char *)xmalloc(n * sizeof(unsigned char));
memset(out, 0, n);
EVP_EncodeBlock(out, buf, strlen((char *)(buf)));
imap_continuation(ssn, (char *)(out), strlen((char *)(out)));
xfree(buf);
xfree(out);
} else
return -1;
return response_authenticate(ssn, t, NULL);
}
/*
* Append supplied message to the specified mailbox.
*/
int
request_append(const char *server, const char *port, const char *user,
const char *mbox, const char *mesg, size_t mesglen, const char *flags,
const char *date)
{
int t, r;
session *s;
const char *m;
if (!(s = session_find(server, port, user)))
return -1;
m = apply_namespace(mbox, s->ns.prefix, s->ns.delim);
do {
if ((t = imap_append(s, m, flags, date, mesglen)) == -1)
goto fail;
if ((r = response_continuation(s)) == -1)
goto fail;
switch (r) {
case STATUS_RESPONSE_CONTINUE:
if (imap_continuation(s, mesg, mesglen) == -1)
goto fail;
if ((r = response_generic(s, t)) == -1)
goto fail;
break;
case STATUS_RESPONSE_TRYCREATE:
if (create_mailbox(s, mbox) == -1)
goto fail;
break;
case -1:
goto fail;
break;
}
} while (r == STATUS_RESPONSE_TRYCREATE);
return r;
fail:
close_connection(s);
session_destroy(s);
return -1;
}
