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imap.c
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#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <netdb.h>
#include <fcntl.h>
#include <time.h>
#include <poll.h>
#include <signal.h>
#include <sys/socket.h>
#include <sys/wait.h>
#ifdef USE_OPENSSL
#include <openssl/ssl.h>
#include <openssl/err.h>
#endif
#if defined(__FreeBSD__)
#define __BSD_VISIBLE 1
#endif
#include "imap.h"
struct imap_ll {
int w_socket;
int r_socket;
time_t timeout_time;
char buffer[1024];
char *bufferp;
size_t buffer_left;
int current_tag_number;
#ifdef USE_OPENSSL
SSL *ssl;
#endif
char *selected_folder;
size_t selected_folder_namelen;
char *selected_folder_uidvalidity;
int selected_folder_writable;
long selected_folder_exists;
};
struct imap_ll *
imap_ll_connect(const char *host, const char *port)
{
struct imap_ll *ll;
struct addrinfo hints, *res, *res0;
int error;
int s;
memset(&hints, 0, sizeof(hints));
hints.ai_family = PF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
error = getaddrinfo(host, port, &hints, &res0);
if (error) {
fprintf(stderr, "getaddrinfo \"%s\":\"%s\": %s\n",
host, port, gai_strerror(error)
);
return NULL;
}
s = -1;
for (res = res0; res; res = res->ai_next) {
s = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
if (s < 0) {
fprintf(stderr, "socket \"%s\":\"%s\": %s\n",
host, port, strerror(errno)
);
continue;
}
if (connect(s, res->ai_addr, res->ai_addrlen) < 0) {
fprintf(stderr, "connect \"%s\":\"%s\": %s\n",
host, port, strerror(errno)
);
close(s);
s = -1;
continue;
}
break;
}
if (s == -1) {
if (!res0) {
fprintf(stderr, "server \"%s\":\"%s\": no available addresses\n",
host, port
);
}
return NULL;
}
ll = malloc(sizeof(*ll));
if (!ll) {
fprintf(stderr, "malloc failed\n");
close(s);
return NULL;
}
memset(ll, 0, sizeof(*ll));
ll->w_socket = ll->r_socket = s;
ll->current_tag_number = -1;
#ifdef USE_OPENSSL
ll->ssl = NULL;
#endif
fcntl(s, F_SETFL, O_NONBLOCK);
return ll;
}
struct imap_ll *
imap_ll_pipe_connect(const char *cmd)
{
struct imap_ll *ll;
pid_t child;
int status;
int r[2], w[2];
if (pipe(&(r[0])) < 0) {
fprintf(stderr, "pipe1 failed\n");
return NULL;
}
if (pipe(&(w[0])) < 0) {
fprintf(stderr, "pipe2 failed\n");
close(r[0]);
close(r[1]);
return NULL;
}
if ((child = fork()) < 0) {
fprintf(stderr, "fork failed\n");
return NULL;
}
if (child == 0) {
close(r[0]);
close(w[1]);
if (r[1] != STDOUT_FILENO) {
dup2(r[1], STDOUT_FILENO);
close(r[1]);
}
if (w[0] != STDIN_FILENO) {
dup2(w[0], STDIN_FILENO);
close(w[0]);
}
execl("/bin/sh", "sh", "-c", cmd, NULL);
_exit(1);
}
close(r[1]);
close(w[0]);
ll = malloc(sizeof(*ll));
if (!ll) {
fprintf(stderr, "malloc failed\n");
close(r[0]);
close(w[1]);
kill(child, SIGTERM);
waitpid(child, &status, 0);
return NULL;
}
memset(ll, 0, sizeof(*ll));
ll->w_socket = w[1];
ll->r_socket = r[0];
ll->current_tag_number = -1;
#ifdef USE_OPENSSL
ll->ssl = NULL;
#endif
fcntl(w[1], F_SETFL, O_NONBLOCK);
fcntl(r[0], F_SETFL, O_NONBLOCK);
return ll;
}
void
imap_ll_timeout(struct imap_ll *ll, int seconds)
{
ll->timeout_time = time(NULL) + seconds;
}
static struct imap_ll_tokenlist *
mktoken(int type, char *leaf, size_t len)
{
struct imap_ll_tokenlist *tl;
tl = malloc(sizeof(*tl));
if (!tl) {
fprintf(stderr, "imap_ll mktoken: malloc failed (fatal)\n");
sleep(1);
_exit(0);
}
tl->type = type;
tl->first = tl->last = NULL;
tl->parent = NULL;
tl->leaf = leaf;
tl->leaflen = len;
if (leaf) leaf[len] = 0;
return tl;
}
static void
growlist(struct imap_ll_tokenlist **nodep, struct imap_ll_tokenlist *tl)
{
if ((*nodep)->last) {
(*nodep)->last->next = tl;
} else {
(*nodep)->first = tl;
}
(*nodep)->last = tl;
tl->parent = *nodep;
tl->next = NULL;
if (!(tl->leaf)) {
*nodep = tl;
}
}
void
imap_ll_freeline(struct imap_ll_tokenlist *t)
{
struct imap_ll_tokenlist *t2;
if (t) {
if (t->leaf) free(t->leaf);
for (t2 = t->first; t2; t2 = t2->next) {
imap_ll_freeline(t2);
}
free(t);
}
}
#define MKPRETOKEN(alloc_size) { \
curtoken = malloc((alloc_size) + 1); \
if (!curtoken) { \
fprintf(stderr, "imap_ll_waitline(%d): malloc failed (fatal)\n", (alloc_size)); \
sleep(1); \
_exit(0); \
} \
curtoken_now = 0; \
curtoken_max = (alloc_size); \
}
struct imap_ll_tokenlist *
imap_ll_waitline(struct imap_ll *ll)
{
int timeout, n;
#ifdef USE_OPENSSL
int ret2;
#endif
char cur;
struct imap_ll_tokenlist *line = NULL;
struct imap_ll_tokenlist *node = NULL;
int linestate = 0;
int recv_tag;
char *curtoken = NULL;
size_t curtoken_now;
size_t curtoken_max;
struct pollfd pfd;
for (;;) {
while (ll->buffer_left) {
cur = *(ll->bufferp);
ll->bufferp++;
ll->buffer_left--;
if ((cur == 10) && (linestate < 7)) {
if (curtoken && (linestate == 4)) {
growlist(&node, mktoken(TLTYPE_ATOM, curtoken, curtoken_now));
} else if (curtoken) {
free(curtoken);
}
curtoken = NULL;
return line;
}
switch (linestate) {
case 0:
/* expect start of line */
if (cur == '*') {
linestate = 1;
} else if (cur == 't') {
linestate = 2;
recv_tag = 0;
} else if (cur == '+') {
line = mktoken(TLTYPE_CONTINUATION, NULL, 0);
linestate = 3;
} else {
linestate = 3;
}
break;
case 1:
/* expect space after untagged prefix */
if (cur == ' ') {
node = line = mktoken(TLTYPE_UNTAGGED, NULL, 0);
linestate = 4;
} else {
linestate = 3;
}
break;
case 2:
/* expect tag */
if (cur == ' ') {
if (recv_tag == ll->current_tag_number) {
node = line = mktoken(TLTYPE_TAGGED, NULL, 0);
linestate = 4;
} else {
/* wrong tag */
linestate = 3;
}
} else if ((cur >= '0') && (cur <= '9')) {
recv_tag *= 10;
recv_tag += cur - '0';
} else {
linestate = 3;
}
break;
case 3:
/* error -- discard until end of line */
break;
case 4:
/* looking for start of next "thing" */
if (cur == 34) {
linestate = 5;
MKPRETOKEN(50);
} else if (cur == 123) {
linestate = 6;
recv_tag = 0;
} else if (
(cur == 91) /* square bracket */ &&
(line == node) /* top level */ &&
(line->first) /* not first in list */ &&
/* list has exactly 1 */
(line->first == line->last)
) {
growlist(&node, mktoken(TLTYPE_SQLIST, NULL, 0));
} else if (cur == 40) {
growlist(&node, mktoken(TLTYPE_LIST, NULL, 0));
} else if ((
(node->type == TLTYPE_LIST) &&
(cur == 41)
) || (
(node->type == TLTYPE_SQLIST) &&
(cur == 93)
)) {
if (curtoken) {
growlist(&node, mktoken(TLTYPE_ATOM, curtoken, curtoken_now));
curtoken = NULL;
}
node = node->parent;
} else if (
(cur == ' ') ||
(cur == 9) ||
(cur == 13)
) {
if (curtoken) {
growlist(&node, mktoken(TLTYPE_ATOM, curtoken, curtoken_now));
curtoken = NULL;
}
} else {
if (!curtoken) {
MKPRETOKEN(25);
}
token_extend:
if (curtoken_now >= curtoken_max) {
curtoken_max *= 2;
curtoken = realloc(curtoken, curtoken_max + 1);
if (!curtoken) {
fprintf(stderr, "imap_ll_waitline(size=%d): malloc failed (fatal)\n", (int)curtoken_max);
sleep(1);
_exit(0);
}
}
curtoken[curtoken_now++] = cur;
}
break;
case 5:
/* quoted string */
if (cur == 34) {
growlist(&node, mktoken(TLTYPE_STRING, curtoken, curtoken_now));
curtoken = NULL;
linestate = 4;
} else {
goto token_extend;
}
break;
case 6:
/* literal count */
if (cur == 125) {
linestate = 7;
} else if ((cur >= '0') && (cur <= '9')) {
recv_tag *= 10;
recv_tag += cur - '0';
} else {
linestate = 3;
}
break;
case 7:
/* CRLF after {nn} */
if (cur == 13) break;
if (cur != 10) {
linestate = 3;
}
MKPRETOKEN(recv_tag);
if (recv_tag == 0) {
growlist(&node, mktoken(TLTYPE_STRING, curtoken, curtoken_now));
curtoken = NULL;
linestate = 4;
} else {
linestate = 8;
}
break;
case 8:
/* literal contents */
curtoken[curtoken_now++] = cur;
if (curtoken_now == curtoken_max) {
growlist(&node, mktoken(TLTYPE_STRING, curtoken, curtoken_now));
curtoken = NULL;
linestate = 4;
}
break;
}
}
#ifdef USE_OPENSSL
if (ll->ssl) {
while ((n = SSL_read(ll->ssl, &((ll->buffer)[0]), sizeof(ll->buffer))) <= 0) {
ret2 = SSL_get_error(ll->ssl, n);
if ((ret2 == SSL_ERROR_WANT_READ) || (ret2 == SSL_ERROR_WANT_WRITE)) {
if (ret2 == SSL_ERROR_WANT_READ) {
pfd.fd = ll->r_socket;
pfd.events = POLLIN;
} else {
pfd.fd = ll->w_socket;
pfd.events = POLLOUT;
}
timeout = ll->timeout_time - time(NULL);
if (timeout < 0) timeout = 0;
if ((n = poll(&pfd, 1, timeout*1000)) < 0) {
if (errno == EINTR) continue;
goto pollerr;
}
if (n == 0) goto polltimeout;
} else {
ERR_print_errors_fp(stderr);
imap_ll_freeline(line);
return NULL;
}
}
} else {
#endif
pfd.fd = ll->r_socket;
pfd.events = POLLIN;
repoll:
timeout = ll->timeout_time - time(NULL);
if (timeout < 0) timeout = 0;
if ((n = poll(&pfd, 1, timeout*1000)) < 0) {
if (errno == EINTR) goto repoll;
#ifdef USE_OPENSSL
pollerr:
#endif
fprintf(stderr, "imap_ll_waitline: poll: %s\n", strerror(errno));
imap_ll_freeline(line);
return NULL;
}
if (n == 0) {
#ifdef USE_OPENSSL
polltimeout:
#endif
fprintf(stderr, "imap_ll_waitline: timeout\n");
imap_ll_freeline(line);
return NULL;
}
if ((n = read(ll->r_socket, &((ll->buffer)[0]), sizeof(ll->buffer))) < 0) {
if (errno == EAGAIN) continue;
if (errno == EINTR) continue;
fprintf(stderr, "imap_ll_waitline: read: %s\n", strerror(errno));
imap_ll_freeline(line);
return NULL;
}
if (n == 0) {
fprintf(stderr, "imap_ll_waitline: read: EOF\n");
imap_ll_freeline(line);
return NULL;
}
#ifdef USE_OPENSSL
}
#endif
ll->buffer_left = n;
ll->bufferp = &((ll->buffer)[0]);
}
}
/* this may overestimate the size a bit */
static size_t
string_len(struct imap_ll_tokenlist *t)
{
size_t result;
switch (t->type) {
case TLTYPE_UNTAGGED:
result = 2;
break;
case TLTYPE_TAGGED:
result = 15;
break;
case TLTYPE_LIST:
case TLTYPE_SQLIST:
result = 2;
break;
case TLTYPE_ATOM:
result = t->leaflen;
break;
case TLTYPE_STRING:
/* worst case is if it's sent as a literal */
result = 20 + t->leaflen;
break;
case TLTYPE_CONTINUATION:
/* shouldn't be used */
result = 2;
break;
case TLTYPE_POP:
case TLTYPE_END:
case TLTYPE_SUB:
default:
result = 0;
}
for (t = t->first; t; t = t->next) {
result++;
result += string_len(t);
}
return result;
}
static char *
format_cmd(char *out, struct imap_ll *ll, struct imap_ll_tokenlist *t)
{
int i;
char close = 0;
switch (t->type) {
case TLTYPE_UNTAGGED:
*(out++) = '*';
*(out++) = ' ';
case TLTYPE_TAGGED:
out += sprintf(out, "t%d ", ++(ll->current_tag_number));
break;
case TLTYPE_LIST:
*(out++) = '('; close = ')';
break;
case TLTYPE_SQLIST:
*(out++) = '['; close = ']';
break;
case TLTYPE_ATOM:
memcpy(out, t->leaf, t->leaflen);
out += t->leaflen;
break;
case TLTYPE_STRING:
for (i = 0; i < t->leaflen; i++) {
if (
(t->leaf[i] < 32) ||
(t->leaf[i] == 34) ||
(t->leaf[i] > 126)
) break;
}
if (i < t->leaflen) {
/* send as litteral */
out += sprintf(out, "{%d+}\015\012", (int)(t->leaflen));
memcpy(out, t->leaf, t->leaflen);
out += t->leaflen;
} else {
/* send as regular string */
*(out++) = 34;
memcpy(out, t->leaf, t->leaflen);
out += t->leaflen;
*(out++) = 34;
}
break;
case TLTYPE_CONTINUATION:
*(out++) = '+';
*(out++) = ' ';
break;
case TLTYPE_END:
case TLTYPE_POP:
case TLTYPE_SUB:
break;
}
i = 0;
for (t = t->first; t; t = t->next) {
if (i) {
*(out++) = ' ';
} else {
i = 1;
}
out = format_cmd(out, ll, t);
}
if (close) {
*(out++) = close;
}
return out;
}
static int
imap_ll_write(struct imap_ll *ll, const char *p, const char *cmdend)
{
ssize_t len;
struct pollfd pfd;
int ctimeout, n;
#ifdef USE_OPENSSL
int ret2;
if (ll->ssl) {
while (p < cmdend) {
n = SSL_write(ll->ssl, p, cmdend-p);
if (n > 0) {
p += n;
} else {
ret2 = SSL_get_error(ll->ssl, n);
if ((ret2 == SSL_ERROR_WANT_READ) || (ret2 == SSL_ERROR_WANT_WRITE)) {
if (ret2 == SSL_ERROR_WANT_READ) {
pfd.fd = ll->r_socket;
pfd.events = POLLIN;
} else {
pfd.fd = ll->w_socket;
pfd.events = POLLOUT;
}
ctimeout = ll->timeout_time - time(NULL);
if (ctimeout < 0) ctimeout = 0;
if ((n = poll(&pfd, 1, ctimeout*1000)) < 0) {
if (errno == EINTR) continue;
goto pollerr;
}
if (n == 0) goto polltimeout;
} else {
ERR_print_errors_fp(stderr);
return 0;
}
}
}
} else {
#endif
pfd.fd = ll->w_socket;
pfd.events = POLLOUT;
while (p < cmdend) {
repoll:
ctimeout = ll->timeout_time - time(NULL);
if (ctimeout < 0) ctimeout = 0;
if ((n = poll(&pfd, 1, ctimeout*1000)) < 0) {
if (errno == EINTR) goto repoll;
#ifdef USE_OPENSSL
pollerr:
#endif
fprintf(stderr, "imap_ll_command: poll: %s\n", strerror(errno));
return 0;
}
if (n == 0) {
#ifdef USE_OPENSSL
polltimeout:
#endif
fprintf(stderr, "imap_ll_command: timeout\n");
return 0;
}
len = write(ll->w_socket, p, cmdend-p);
if (len < 0) {
if (errno == EAGAIN) continue;
if (errno == EINTR) continue;
fprintf(stderr, "imap_ll_command: write: %s\n", strerror(errno));
return 0;
} else if (len == 0) {
fprintf(stderr, "imap_ll_command: short write\n");
return 0;
}
p += len;
}
#ifdef USE_OPENSSL
}
#endif
return 1;
}
struct imap_ll_tokenlist *
imap_ll_command(struct imap_ll *ll, struct imap_ll_tokenlist *cmd, int timeout)
{
size_t len;
char *cmds, *cmdend;
struct imap_ll_tokenlist *result, *cur;
len = string_len(cmd);
cmds = malloc(len+1);
if (!cmds) {
fprintf(stderr, "imap_ll_command: malloc failed\n");
return NULL;
}
cmdend = format_cmd(cmds, ll, cmd);
*(cmdend++) = 13;
*(cmdend++) = 10;
imap_ll_timeout(ll, timeout);
if (!imap_ll_write(ll, cmds, cmdend)) {
free(cmds);
return NULL;
}
free(cmds);
result = mktoken(TLTYPE_LIST, NULL, 0);
for (;;) {
if (!(cur = imap_ll_waitline(ll))) {
imap_ll_freeline(result);
return NULL;
}
cur->parent = result;
cur->next = NULL;
if (result->first) {
result->last->next = cur;
} else {
result->first = cur;
}
result->last = cur;
if (cur->type == TLTYPE_TAGGED) {
cur->next = NULL;
return result;
}
}
}
void
imap_ll_logout(struct imap_ll *ll)
{
size_t len;
struct imap_ll_tokenlist *cur;
char cmd[25];
len = sprintf(cmd, "t%d LOGOUT\015\012", ++(ll->current_tag_number));
imap_ll_timeout(ll, 5);
if (!imap_ll_write(ll, cmd, cmd+len)) return;
imap_ll_timeout(ll, 5);
for (;;) {
if (!(cur = imap_ll_waitline(ll))) {
return;
}
if (cur->type == TLTYPE_TAGGED) {
break;
}
imap_ll_freeline(cur);
}
imap_ll_freeline(cur);
}
struct imap_ll_tokenlist *
imap_ll_build(enum imap_ll_tltype maintype, ...)
{
va_list ap;
struct imap_ll_tokenlist *top = NULL;
struct imap_ll_tokenlist *cur = NULL;
struct imap_ll_tokenlist *l;
char *s;
size_t slen;
int descend;
enum imap_ll_tltype next_type = maintype;
va_start(ap, maintype);
for (;;) {
switch (next_type) {
default:
case TLTYPE_END:
va_end(ap);
return top;
case TLTYPE_SUB:
l = va_arg(ap, struct imap_ll_tokenlist *);
descend = 0;
break;
case TLTYPE_ATOM:
case TLTYPE_STRING:
s = va_arg(ap, char *);
slen = va_arg(ap, size_t);
if (slen == -1) slen = strlen(s);
l = malloc(sizeof(*l));
if (!l) {
nomem:
fprintf(stderr, "imap_ll_build: malloc failure\n");
imap_ll_freeline(top);
va_end(ap);
return NULL;
}
l->type = next_type;
l->leaf = malloc(slen+1);
if (!(l->leaf)) {
free(l);
goto nomem;
}
memcpy(l->leaf, s, slen);
l->leaf[slen] = 0;
l->leaflen = slen;
descend = 0;
break;
case TLTYPE_TAGGED:
case TLTYPE_UNTAGGED:
case TLTYPE_LIST:
case TLTYPE_SQLIST:
l = malloc(sizeof(*l));
if (!l) goto nomem;
l->type = next_type;
l->leaf = NULL;
descend = 1;
break;
case TLTYPE_CONTINUATION:
l = malloc(sizeof(*l));
if (!l) goto nomem;
l->type = TLTYPE_CONTINUATION;
l->leaf = NULL;
descend = 0;
break;
case TLTYPE_POP:
break;
}
if (next_type == TLTYPE_POP) {
cur = cur->parent;
} else {
if (next_type != TLTYPE_SUB) l->first = l->last = NULL;
l->parent = cur;
l->next = NULL;
if (cur) {
if (cur->last) {
cur->last->next = l;
cur->last = l;
} else {
cur->first = cur->last = l;
}
} else {
top = cur = l;
}
if (descend) cur = l;
}
next_type = va_arg(ap, int);
}
}
void
imap_ll_append(struct imap_ll_tokenlist *list, struct imap_ll_tokenlist *item)
{
if (list->last) {
list->last->next = item;
} else {
list->first = item;
}
list->last = item;
item->parent = list;
}
const char *
imap_ll_status(struct imap_ll_tokenlist *t)
{
t = t->last->first;
if (!t) return "BAD";
if ((t->type) != TLTYPE_ATOM) return "BAD";
return t->leaf;
}
int
imap_ll_is_trycreate(struct imap_ll_tokenlist *t)
{
return (
(0 == strcmp(imap_ll_status(t), "NO")) &&
(t->last->first->next) &&
((t->last->first->next->type) == TLTYPE_SQLIST) &&
(t->last->first->next->first) &&
((t->last->first->next->first->type) == TLTYPE_ATOM) &&
(0 == strcmp(t->last->first->next->first->leaf, "TRYCREATE"))
);
}
#ifdef USE_OPENSSL
enum imap_ll_starttls_result
imap_ll_starttls(struct imap_ll *ll, SSL_CTX *sslctx, const char *servername)
{
struct imap_ll_tokenlist *cmd, *l;
const char *status;
struct pollfd pfd;
int ret, ret2, timeout;
SSL *ssl;
long vr;
X509 *peer;
size_t servernamelen, certnamelen;
char buf[256];
char buf2[256];
ssl = SSL_new(sslctx);
if (!ssl) {
ERR_print_errors_fp(stderr);
}
cmd = imap_ll_build(TLTYPE_TAGGED, TLTYPE_ATOM, "STARTTLS", (size_t)-1, TLTYPE_END);
if (!cmd) {
fprintf(stderr, "could not build STARTTLS command\n");
SSL_free(ll->ssl); ll->ssl = NULL;
return IMAP_LL_STARTTLS_FAILED_PROCEED;
}
l = imap_ll_command(ll, cmd, 5);
imap_ll_freeline(cmd);
status = imap_ll_status(l);
if (0 == strcmp(status, "NO")) {
fprintf(stderr, "STARTTLS not accepted by server\n");
imap_ll_freeline(l);
SSL_free(ll->ssl); ll->ssl = NULL;
return IMAP_LL_STARTTLS_FAILED_PROCEED;
} else if (0 != strcmp(status, "OK")) {
fprintf(stderr, "STARTTLS not understood by server\n");
imap_ll_freeline(l);
SSL_free(ll->ssl); ll->ssl = NULL;
return IMAP_LL_STARTTLS_FAILED_PROCEED;
}
imap_ll_freeline(l);
SSL_set_rfd(ssl, ll->r_socket);
SSL_set_wfd(ssl, ll->w_socket);
imap_ll_timeout(ll, 10); /* reset clock */
for (;;) {
ret = SSL_connect(ssl);
if (ret == 1) break;
ret2 = SSL_get_error(ssl, ret);
if ((ret2 == SSL_ERROR_WANT_READ) || (ret2 == SSL_ERROR_WANT_WRITE)) {
if (ret2 == SSL_ERROR_WANT_READ) {
pfd.fd = ll->r_socket;
pfd.events = POLLIN;
} else {
pfd.fd = ll->w_socket;
pfd.events = POLLOUT;
}
timeout = ll->timeout_time - time(NULL);
if (timeout < 0) timeout = 0;
if ((ret = poll(&pfd, 1, timeout*1000)) < 0) {
if (errno == EINTR) continue;
fprintf(stderr, "STARTTLS poll error: %s\n", strerror(errno));
SSL_free(ssl);
return IMAP_LL_STARTTLS_FAILED;
}
if (ret == 0) {
fprintf(stderr, "STARTTLS timeout\n");
SSL_free(ssl);
return IMAP_LL_STARTTLS_FAILED;
}
} else {
ERR_error_string(ERR_get_error(), &(buf[0]));
fprintf(stderr, "STARTTLS: %s\n", buf);
SSL_free(ssl);
return IMAP_LL_STARTTLS_FAILED;
}
}
if ((vr = SSL_get_verify_result(ssl)) != X509_V_OK) {
fprintf(stderr, "STARTTLS: ceritifcate verification failed (%ld)\n", vr);
certfail:
SSL_free(ssl);
return IMAP_LL_STARTTLS_FAILED_CERT;
}
if (!(peer = SSL_get_peer_certificate(ssl))) {
fprintf(stderr, "STARTTLS: no peer certificate?\n");
goto certfail;
}
if (X509_NAME_get_text_by_NID(X509_get_subject_name(peer), NID_commonName, buf, sizeof(buf)) == -1) {
fprintf(stderr, "STARTTLS: no common name in certificate?\n");
goto certfail;
}
if (!servername) goto certok; /* caller does not want us to check */
if (0 != strcasecmp(buf, servername)){
/* Certificate name does not match exactly.
Check for a wildcard certificate name.
The only valid form for certificate naming wildcards is
an asterisk as the first character followed by any number
of non-wild characters */
if (buf[0] == '*') {
servernamelen = strlen(servername);
certnamelen = strlen(buf+1);
if (
(servernamelen >= certnamelen) &&
(0 == strcasecmp(
buf+1,
servername + (servernamelen-certnamelen))
)
) {
goto certok;
}
}
snprintf(buf2, sizeof(buf2), "%s", servername);
fprintf(stderr, "STARTTLS: server name \"%s\" != certificate common name \"%s\"\n", buf2, buf);
goto certfail;
}
certok:
ll->ssl = ssl;
return IMAP_LL_STARTTLS_SUCCESS;
}
#endif
void
imap_ll_pprint(struct imap_ll_tokenlist *t, int indent, FILE *out)
{
int plusindent = 0;
int i;
const char *close = NULL;
switch (t->type) {
case TLTYPE_UNTAGGED:
for (i = 0; i < indent; i++) fputc(9, out);
fprintf(out, "*\n");
break;
case TLTYPE_TAGGED:
break;
case TLTYPE_LIST:
plusindent = 1;
for (i = 0; i < indent; i++) fputc(9, out);
fprintf(out, "(\n"); close = ")\n";
break;
case TLTYPE_SQLIST: