mirror of
https://github.com/warmcat/libwebsockets.git
synced 2025-03-16 00:00:07 +01:00
http-client: digest auth support added
This commit is contained in:
Ilya Smelykh
parent
91f0b3bc0f
commit
b6a4080947
8 changed files with 444 additions and 5 deletions
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@ -234,6 +234,8 @@ struct lws_client_connect_info {
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* context template to take a copy of for this wsi. Used to isolate
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* wsi-specific logs into their own stream or file.
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*/
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const char *auth_username;
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const char *auth_password;
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/* Add new things just above here ---^
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* This is part of the ABI, don't needlessly break compatibility
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@ -307,7 +307,7 @@ lws_json_simple_strcmp(const char *buf, size_t len, const char *name, const char
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* string.
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*/
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LWS_VISIBLE LWS_EXTERN int
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lws_hex_to_byte_array(const char *h, uint8_t *dest, int max);
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lws_hex_to_byte_array(const char *h, int hlen_or_minus1, uint8_t *dest, int max);
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/**
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* lws_hex_from_byte_array(): render byte array as hex char string
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@ -359,6 +359,8 @@ lws_client_connect_via_info(const struct lws_client_connect_info *i)
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cisin[CIS_METHOD] = i->method;
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cisin[CIS_IFACE] = i->iface;
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cisin[CIS_ALPN] = i->alpn;
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cisin[CIS_USERNAME] = i->auth_username;
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cisin[CIS_PASSWORD] = i->auth_password;
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if (lws_client_stash_create(wsi, cisin))
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goto bail;
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@ -187,6 +187,12 @@ lws_client_connect_2_dnsreq(struct lws *wsi)
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goto solo;
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}
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if (wsi->keepalive_rejected) {
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lwsl_notice("defeating pipelining due to no "
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"keepalive on server\n");
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goto solo;
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}
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/* only pipeline things we associate with being a stream */
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if (meth && strcmp(meth, "RAW") && strcmp(meth, "GET") &&
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@ -221,6 +221,8 @@ enum {
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CIS_METHOD,
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CIS_IFACE,
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CIS_ALPN,
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CIS_USERNAME,
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CIS_PASSWORD,
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CIS_COUNT
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@ -130,11 +130,14 @@ signed char char_to_hex(const char c)
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}
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int
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lws_hex_to_byte_array(const char *h, uint8_t *dest, int max)
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lws_hex_to_byte_array(const char *h, int hlen_or_minus1, uint8_t *dest, int max)
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{
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uint8_t *odest = dest;
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while (max-- && *h) {
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if (hlen_or_minus1 != -1 && (hlen_or_minus1 & 1))
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return -1;
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while ((hlen_or_minus1 == -1 || hlen_or_minus1 > 1) && max-- && *h) {
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int t = char_to_hex(*h++), t1;
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if (!*h || t < 0)
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@ -150,7 +153,7 @@ lws_hex_to_byte_array(const char *h, uint8_t *dest, int max)
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if (max < 0)
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return -1;
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return lws_ptr_diff(dest, odest);
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return (int)(dest - odest);
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}
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static char *hexch = "0123456789abcdef";
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@ -171,6 +174,25 @@ lws_hex_from_byte_array(const uint8_t *src, size_t slen, char *dest, size_t len)
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*dest = '\0';
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}
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int
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lws_byte_array_to_hex(const uint8_t *src, size_t len, char *dest, size_t dlen)
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{
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char *odest = dest;
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if (dlen < (2 * len) + 1)
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return -1;
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while (len--) {
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*dest++ = hexch[(*src) >> 4];
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*dest++ = hexch[(*src) & 15];
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src++;
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}
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*dest = '\0';
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return (int)(dest - odest);
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}
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int
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lws_hex_random(struct lws_context *context, char *dest, size_t len)
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{
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@ -579,6 +579,372 @@ lws_http_client_http_response(struct lws *wsi)
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}
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#endif
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#if defined(LWS_WITH_HTTP_DIGEST_AUTH)
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static const char *digest_toks[] = {
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"Digest", // 1 << 0
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"username", // 1 << 1
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"realm", // 1 << 2
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"nonce", // 1 << 3
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"uri", // 1 << 4 optional
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"response", // 1 << 5
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"opaque", // 1 << 6
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"qop", // 1 << 7
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"algorithm" // 1 << 8
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"nc", // 1 << 9
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"cnonce", // 1 << 10
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"domain", // 1 << 11
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};
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#define PEND_NAME_EQ -1
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#define PEND_DELIM -2
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enum lws_check_basic_auth_results
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lws_http_digest_auth(struct lws* wsi) {
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char b64[512];
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int m, ml, fi;
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uint8_t nonce[128], response[LWS_GENHASH_LARGEST], qop[32];
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int seen = 0, n, pend = -1, skipping = 0, urilen;
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struct lws_tokenize ts;
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lws_tokenize_elem e;
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char realm[64];
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time_t t;
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char resp_username[32];
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/* Did he send auth? */
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ml = lws_hdr_total_length(wsi, WSI_TOKEN_HTTP_WWW_AUTHENTICATE);
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if (!ml)
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return LCBA_FAILED_AUTH;
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/* Disallow fragmentation monkey business */
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fi = wsi->http.ah->frag_index[WSI_TOKEN_HTTP_WWW_AUTHENTICATE];
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if (wsi->http.ah->frags[fi].nfrag) {
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lwsl_err("fragmented http auth header not allowed\n");
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return LCBA_FAILED_AUTH;
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}
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m = lws_hdr_copy(wsi, b64, sizeof(b64), WSI_TOKEN_HTTP_WWW_AUTHENTICATE);
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if (m < 7) {
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lwsl_err("%s: HTTP auth length bad\n", __func__);
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return LCBA_END_TRANSACTION;
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}
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/*
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* We are expecting AUTHORIZATION to have something like this
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*
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* Authorization: Digest
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* username="Mufasa",
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* realm="testrealm@host.com",
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* nonce="dcd98b7102dd2f0e8b11d0f600bfb0c093",
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* uri="/dir/index.html",
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* response="e966c932a9242554e42c8ee200cec7f6",
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* opaque="5ccc069c403ebaf9f0171e9517f40e41"
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*
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* but the order, whitespace etc is quite open. uri is optional
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*/
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ts.start = b64;
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ts.len = m;
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ts.flags = LWS_TOKENIZE_F_MINUS_NONTERM | LWS_TOKENIZE_F_NO_INTEGERS |
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LWS_TOKENIZE_F_RFC7230_DELIMS;
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do {
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e = lws_tokenize(&ts);
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switch (e) {
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case LWS_TOKZE_TOKEN:
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if (pend == 8) {
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/* algorithm name */
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if (strncasecmp(ts.token, "MD5", ts.token_len)) {
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lwsl_err("wrong alg %.*s\n", ts.token_len, ts.token);
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return LCBA_END_TRANSACTION;
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}
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pend = PEND_DELIM;
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break;
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}
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if (strncasecmp(ts.token, "Digest", ts.token_len)) {
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skipping = 1;
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seen |= 1 << 0;
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break;
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}
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if (seen) { /* we must be first and one time */
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lwsl_notice("%s: repeated auth type\n", __func__);
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return LCBA_END_TRANSACTION;
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}
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seen |= 1 << 15;
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pend = PEND_NAME_EQ;
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break;
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case LWS_TOKZE_TOKEN_NAME_EQUALS:
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if (skipping)
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break;
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if (!(seen & (1 << 15)) || pend != -1) {
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lwsl_notice("%s: b\n", __func__);
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/* no auth type token or disordered */
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return LCBA_END_TRANSACTION;
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}
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for (n = 0; n < (int)LWS_ARRAY_SIZE(digest_toks); n++)
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if (!strncmp(ts.token, digest_toks[n], ts.token_len))
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break;
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if (n == LWS_ARRAY_SIZE(digest_toks)) {
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lwsl_notice("%s: c: '%.*s'\n", __func__, ts.token_len,
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ts.token);
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return LCBA_END_TRANSACTION;
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}
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if (seen & (1 << n) || !(seen & (1 << 15))) {
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lwsl_notice("%s: d\n", __func__);
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/* dup or no auth type token */
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return LCBA_END_TRANSACTION;
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}
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seen |= 1 << n;
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pend = n;
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break;
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case LWS_TOKZE_QUOTED_STRING:
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if (skipping)
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break;
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if (pend < 0) {
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lwsl_notice("%s: e\n", __func__);
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return LCBA_END_TRANSACTION;
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}
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switch (pend) {
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case 1: /* username */
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if (ts.token_len >= (int)sizeof(resp_username)) {
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lwsl_notice("%s: f\n", __func__);
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return LCBA_END_TRANSACTION;
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}
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strncpy(resp_username, ts.token, ts.token_len);
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break;
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case 2: /* realm */
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if (ts.token_len >= (int)sizeof(realm)) {
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lwsl_notice("%s: f1\n", __func__);
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return LCBA_END_TRANSACTION;
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}
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strncpy(realm, ts.token, ts.token_len);
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realm[ts.token_len] = 0;
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break;
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case 3: /* nonce */
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if (ts.token_len >= (int)sizeof(nonce)) {
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lwsl_notice("%s: g\n", __func__);
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return LCBA_END_TRANSACTION;
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}
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strncpy(nonce, ts.token, ts.token_len);
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nonce[ts.token_len] = 0;
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break;
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case 4: /* uri */
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break;
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case 5: /* response */
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if (ts.token_len !=
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(int)lws_genhash_size(LWS_GENHASH_TYPE_MD5) * 2) {
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lwsl_notice("%s: h\n", __func__);
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return LCBA_END_TRANSACTION;
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}
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if (lws_hex_to_byte_array(ts.token, ts.token_len,
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response,
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sizeof(response)) < 0) {
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lwsl_notice("%s: i\n", __func__);
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return LCBA_END_TRANSACTION;
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}
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break;
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case 6: /* opaque */
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break;
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case 7: /* qop */
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if (strncmp(ts.token, "auth", ts.token_len)) {
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lwsl_notice("%s: j\n", __func__);
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return LCBA_END_TRANSACTION;
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}
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strncpy(qop, ts.token, ts.token_len);
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qop[ts.token_len] = 0;
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break;
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}
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pend = PEND_DELIM;
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break;
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case LWS_TOKZE_DELIMITER:
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if (*ts.token == ',') {
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if (skipping)
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break;
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if (pend != PEND_DELIM) {
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lwsl_notice("%s: k\n", __func__);
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return LCBA_END_TRANSACTION;
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}
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pend = PEND_NAME_EQ;
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break;
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}
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if (*ts.token == ';') {
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if (skipping) {
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/* try again with this one */
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skipping = 0;
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break;
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}
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/* it's the end */
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e = LWS_TOKZE_ENDED;
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break;
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}
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break;
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case LWS_TOKZE_ENDED:
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break;
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default:
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lwsl_notice("%s: unexpected token %d\n", __func__, e);
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return LCBA_END_TRANSACTION;
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}
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} while (e > 0);
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if (e != LWS_TOKZE_ENDED) {
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lwsl_notice("%s: l\n", __func__);
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return LCBA_END_TRANSACTION;
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}
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/* we got all the parts we care about? */
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// Realm, nonce
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if ((seen & 0xc) != 0xc) {
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#if LWS_LIBRARY_VERSION_NUMBER >= 4003000
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lwsl_wsi_err(wsi,
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"%s: Not all digest auth tokens found! m: 0x%x\nServer sent: %s",
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__func__, seen & 0x81ef, b64);
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#else
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lwsl_err(
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"%s: Not all digest auth tokens found! m: 0x%x\nServer sent: %s",
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__func__, seen & 0x81ef, b64);
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#endif
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return LCBA_END_TRANSACTION;
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}
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lwsl_notice("HTTP digest auth realm %s nonce %s\n", realm, nonce);
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if (wsi->stash && wsi->stash->cis[CIS_METHOD] && wsi->stash->cis[CIS_PATH]) {
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uint8_t digest[LWS_GENHASH_LARGEST * 2 + 1];
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char a1[LWS_GENHASH_LARGEST * 2 + 1];
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char a2[LWS_GENHASH_LARGEST * 2 + 1];
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char cnonce[128];
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char nc[sizeof(int) * 2 + 1];
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int ncount = 1;
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char response[512];
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struct lws_genhash_ctx hc;
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char* username = wsi->stash->cis[CIS_USERNAME];
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char* password = wsi->stash->cis[CIS_PASSWORD];
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char* uri = wsi->stash->cis[CIS_PATH];
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char* nbuf[strlen(uri) + 256];
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// A1
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n = lws_snprintf(nbuf, sizeof(nbuf), "%s:%s:%s", username,
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realm, password);
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if (lws_genhash_init(&hc, LWS_GENHASH_TYPE_MD5) ||
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lws_genhash_update(&hc, nbuf, n) || lws_genhash_destroy(&hc, digest)) {
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lws_genhash_destroy(&hc, NULL);
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lwsl_err("%s: hash failed\n", __func__);
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return -1;
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}
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lws_byte_array_to_hex(digest, lws_genhash_size(LWS_GENHASH_TYPE_MD5),
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a1, sizeof(a1));
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lwsl_debug("A1: %s:%s:%s = %s\n", username, realm, password, a1);
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n = lws_snprintf(nbuf, sizeof(nbuf), "%s:%s",
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wsi->stash->cis[CIS_METHOD],
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uri);
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if (lws_genhash_init(&hc, LWS_GENHASH_TYPE_MD5) ||
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lws_genhash_update(&hc, nbuf, n) || lws_genhash_destroy(&hc, digest)) {
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lws_genhash_destroy(&hc, NULL);
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lwsl_err("%s: hash failed\n", __func__);
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return -1;
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}
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lws_byte_array_to_hex(digest, lws_genhash_size(LWS_GENHASH_TYPE_MD5),
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a2, sizeof(a2));
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lwsl_debug("A2: %s:%s = %s\n", wsi->stash->cis[CIS_METHOD],
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uri, a2);
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// cnonce
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lws_hex_random(lws_get_context(wsi), cnonce, sizeof(cnonce));
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// nc
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lws_byte_array_to_hex(&ncount, sizeof(ncount), nc, sizeof(nc));
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// response
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n = lws_snprintf(nbuf, sizeof(nbuf), "%s:%s:%08x:%s:%s:%s", a1,
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nonce, ncount, cnonce, qop, a2);
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if (lws_genhash_init(&hc, LWS_GENHASH_TYPE_MD5) ||
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lws_genhash_update(&hc, nbuf, n) || lws_genhash_destroy(&hc, digest)) {
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lws_genhash_destroy(&hc, NULL);
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lwsl_err("%s: hash failed\n", __func__);
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return -1;
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}
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lwsl_debug("digest response: %s\n", nbuf);
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lws_byte_array_to_hex(digest, lws_genhash_size(LWS_GENHASH_TYPE_MD5),
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response, lws_genhash_size(LWS_GENHASH_TYPE_MD5) * 2 + 1);
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// Authorization header
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n = lws_snprintf(
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nbuf, sizeof(nbuf),
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"Digest username=\"%s\", realm=\"%s\", nonce=\"%s\", uri=\"%s\", "
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"qop=%s, nc=%08x, cnonce=\"%s\", response=\"%s\", "
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"algorithm=\"MD5\"",
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username, realm, nonce, uri, qop, ncount,
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cnonce, response);
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lwsl_hexdump(nbuf, n);
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wsi->http.pending_digest_auth_hdr = 1;
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strncpy(wsi->http.digest_auth_hdr, nbuf, n);
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if (lws_hdr_simple_create(wsi, WSI_TOKEN_HTTP_AUTHORIZATION, nbuf)) {
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lwsl_err("Failed to add Auth header to WSI for Digest auth");
|
||||
return -1;
|
||||
}
|
||||
|
||||
struct lws* nwsi = lws_get_network_wsi(wsi);
|
||||
int ssl = nwsi->tls.use_ssl & LCCSCF_USE_SSL;
|
||||
void* stash = wsi->stash;
|
||||
const char *a, *p;
|
||||
a = wsi->stash->cis[CIS_ADDRESS];
|
||||
p = &wsi->stash->cis[CIS_PATH][1];
|
||||
// wsi->stash = NULL;
|
||||
// This prevents connection pipelining when two HTTP connection use same
|
||||
// tcp socket.
|
||||
wsi->keepalive_rejected = 1;
|
||||
if (!lws_client_reset(&wsi, ssl, a, wsi->c_port, p, a, 1)) {
|
||||
#if LWS_LIBRARY_VERSION_NUMBER >= 4003000
|
||||
lwsl_wsi_err(wsi, "Failed to reset WSI for Digest auth");
|
||||
#else
|
||||
lwsl_err("Failed to reset WSI for Digest auth");
|
||||
#endif
|
||||
return -1;
|
||||
}
|
||||
// wsi->stash = stash;
|
||||
wsi->client_pipeline = 0;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(LWS_ROLE_H1) || defined(LWS_ROLE_H2)
|
||||
|
||||
int
|
||||
|
|
@ -605,6 +971,7 @@ lws_client_interpret_server_handshake(struct lws *wsi)
|
|||
wsi->conmon.ciu_txn_resp = (lws_conmon_interval_us_t)
|
||||
(lws_now_usecs() - wsi->conmon_datum);
|
||||
#endif
|
||||
// lws_free_set_NULL(wsi->stash);
|
||||
|
||||
ah = wsi->http.ah;
|
||||
if (!wsi->do_ws) {
|
||||
|
|
@ -692,6 +1059,32 @@ lws_client_interpret_server_handshake(struct lws *wsi)
|
|||
}
|
||||
#endif
|
||||
n = atoi(p);
|
||||
|
||||
#if defined(LWS_WITH_HTTP_DIGEST_AUTH)
|
||||
if (n == 401 && lws_hdr_simple_ptr(wsi, WSI_TOKEN_HTTP_WWW_AUTHENTICATE)) {
|
||||
if (!(wsi->stash && wsi->stash->cis[CIS_USERNAME] &&
|
||||
wsi->stash->cis[CIS_PASSWORD])) {
|
||||
lwsl_err(
|
||||
"Digest auth requested by server but no credentials provided "
|
||||
"by user\n");
|
||||
return LCBA_FAILED_AUTH;
|
||||
}
|
||||
|
||||
if (0 != lws_http_digest_auth(wsi)) {
|
||||
if (wsi)
|
||||
goto bail3;
|
||||
return 1;
|
||||
}
|
||||
|
||||
opaque = wsi->a.opaque_user_data;
|
||||
lws_close_free_wsi(wsi, LWS_CLOSE_STATUS_NOSTATUS, "digest_auth_step2");
|
||||
wsi->a.opaque_user_data = opaque;
|
||||
|
||||
return -1;
|
||||
}
|
||||
|
||||
ah = wsi->http.ah;
|
||||
#endif
|
||||
if (ah)
|
||||
ah->http_response = (unsigned int)n;
|
||||
|
||||
|
|
@ -1249,6 +1642,13 @@ lws_generate_client_handshake(struct lws *wsi, char *pkt)
|
|||
}
|
||||
#endif
|
||||
|
||||
#if defined(LWS_WITH_HTTP_DIGEST_AUTH)
|
||||
if (wsi->http.pending_digest_auth_hdr) {
|
||||
p += lws_snprintf(p, 1024, "Authorization: %s\x0d\x0a",
|
||||
wsi->http.digest_auth_hdr);
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(LWS_ROLE_WS)
|
||||
if (wsi->do_ws) {
|
||||
const char *conn1 = "";
|
||||
|
|
@ -1635,7 +2035,7 @@ lws_client_reset(struct lws **pwsi, int ssl, const char *address, int port,
|
|||
cisin[CIS_ALPN] = wsi->alpn;
|
||||
#endif
|
||||
|
||||
if (lws_client_stash_create(wsi, cisin))
|
||||
if (!wsi->stash && lws_client_stash_create(wsi, cisin))
|
||||
return NULL;
|
||||
|
||||
if (!port) {
|
||||
|
|
|
|||
|
|
@ -279,6 +279,11 @@ struct _lws_http_mode_related {
|
|||
unsigned int multipart:1;
|
||||
unsigned int cgi_transaction_complete:1;
|
||||
unsigned int multipart_issue_boundary:1;
|
||||
|
||||
char auth_username[64];
|
||||
char auth_password[64];
|
||||
unsigned int pending_digest_auth_hdr:1;
|
||||
char digest_auth_hdr[4096];
|
||||
};
|
||||
|
||||
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue