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require IMAP4rev1 capability

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technically, we should have been doing that since the beginning, but as
there is IMAP4rev2 now, it might actually matter (in about a decade,
when servers start dropping backwards compat ...).
This commit is contained in:
Oswald Buddenhagen 2021-11-24 23:05:29 +01:00
parent 4a5c79993c
commit 5243c69863
1 changed files with 9 additions and 1 deletions
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10
src/drv_imap.c
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@ -225,7 +225,8 @@ typedef union {
#define CAP(cap) (ctx->caps & (1 << (cap)))
enum CAPABILITY {
NOLOGIN = 0,
IMAP4REV1,
NOLOGIN,
#ifdef HAVE_LIBSASL
SASLIR,
#endif
@ -244,6 +245,7 @@ static const struct {
const char *str;
uint len;
} cap_list[] = {
{ "IMAP4REV1", 9 },
{ "LOGINDISABLED", 13 },
#ifdef HAVE_LIBSASL
{ "SASL-IR", 7 },
@ -2088,6 +2090,12 @@ imap_open_store_authenticate( imap_store_t *ctx )
imap_server_conf_t *srvc = ctx->conf->server;
#endif
if (!CAP(IMAP4REV1)) {
error( "IMAP error: Server does not support IMAP4rev1\n" );
imap_open_store_bail( ctx, FAIL_FINAL );
return;
}
if (ctx->greeting != GreetingPreauth) {
#ifdef HAVE_LIBSSL
if (srvc->ssl_type == SSL_STARTTLS) {