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-rw-r--r--lib/vauth/digest.c881
-rw-r--r--lib/vauth/digest.h43
-rw-r--r--lib/vauth/digest_sspi.c527
-rw-r--r--lib/vauth/vauth.h28
4 files changed, 1479 insertions, 0 deletions
diff --git a/lib/vauth/digest.c b/lib/vauth/digest.c
new file mode 100644
index 000000000..ee8646b86
--- /dev/null
+++ b/lib/vauth/digest.c
@@ -0,0 +1,881 @@
+/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at http://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ * RFC2831 DIGEST-MD5 authentication
+ *
+ ***************************************************************************/
+
+#include "curl_setup.h"
+
+#if !defined(CURL_DISABLE_CRYPTO_AUTH)
+
+#include <curl/curl.h>
+
+#include "vauth/vauth.h"
+#include "vauth/digest.h"
+#include "urldata.h"
+#include "curl_base64.h"
+#include "curl_hmac.h"
+#include "curl_md5.h"
+#include "vtls/vtls.h"
+#include "warnless.h"
+#include "strtok.h"
+#include "rawstr.h"
+#include "non-ascii.h" /* included for Curl_convert_... prototypes */
+#include "curl_printf.h"
+
+/* The last #include files should be: */
+#include "curl_memory.h"
+#include "memdebug.h"
+
+#if !defined(USE_WINDOWS_SSPI)
+#define DIGEST_QOP_VALUE_AUTH (1 << 0)
+#define DIGEST_QOP_VALUE_AUTH_INT (1 << 1)
+#define DIGEST_QOP_VALUE_AUTH_CONF (1 << 2)
+
+#define DIGEST_QOP_VALUE_STRING_AUTH "auth"
+#define DIGEST_QOP_VALUE_STRING_AUTH_INT "auth-int"
+#define DIGEST_QOP_VALUE_STRING_AUTH_CONF "auth-conf"
+
+/* The CURL_OUTPUT_DIGEST_CONV macro below is for non-ASCII machines.
+ It converts digest text to ASCII so the MD5 will be correct for
+ what ultimately goes over the network.
+*/
+#define CURL_OUTPUT_DIGEST_CONV(a, b) \
+ result = Curl_convert_to_network(a, (char *)b, strlen((const char*)b)); \
+ if(result) { \
+ free(b); \
+ return result; \
+ }
+#endif /* !USE_WINDOWS_SSPI */
+
+bool Curl_sasl_digest_get_pair(const char *str, char *value, char *content,
+ const char **endptr)
+{
+ int c;
+ bool starts_with_quote = FALSE;
+ bool escape = FALSE;
+
+ for(c = DIGEST_MAX_VALUE_LENGTH - 1; (*str && (*str != '=') && c--); )
+ *value++ = *str++;
+ *value = 0;
+
+ if('=' != *str++)
+ /* eek, no match */
+ return FALSE;
+
+ if('\"' == *str) {
+ /* This starts with a quote so it must end with one as well! */
+ str++;
+ starts_with_quote = TRUE;
+ }
+
+ for(c = DIGEST_MAX_CONTENT_LENGTH - 1; *str && c--; str++) {
+ switch(*str) {
+ case '\\':
+ if(!escape) {
+ /* possibly the start of an escaped quote */
+ escape = TRUE;
+ *content++ = '\\'; /* Even though this is an escape character, we still
+ store it as-is in the target buffer */
+ continue;
+ }
+ break;
+
+ case ',':
+ if(!starts_with_quote) {
+ /* This signals the end of the content if we didn't get a starting
+ quote and then we do "sloppy" parsing */
+ c = 0; /* the end */
+ continue;
+ }
+ break;
+
+ case '\r':
+ case '\n':
+ /* end of string */
+ c = 0;
+ continue;
+
+ case '\"':
+ if(!escape && starts_with_quote) {
+ /* end of string */
+ c = 0;
+ continue;
+ }
+ break;
+ }
+
+ escape = FALSE;
+ *content++ = *str;
+ }
+
+ *content = 0;
+ *endptr = str;
+
+ return TRUE;
+}
+
+#if !defined(USE_WINDOWS_SSPI)
+/* Convert md5 chunk to RFC2617 (section 3.1.3) -suitable ascii string*/
+static void sasl_digest_md5_to_ascii(unsigned char *source, /* 16 bytes */
+ unsigned char *dest) /* 33 bytes */
+{
+ int i;
+ for(i = 0; i < 16; i++)
+ snprintf((char *) &dest[i * 2], 3, "%02x", source[i]);
+}
+
+/* Perform quoted-string escaping as described in RFC2616 and its errata */
+static char *sasl_digest_string_quoted(const char *source)
+{
+ char *dest, *d;
+ const char *s = source;
+ size_t n = 1; /* null terminator */
+
+ /* Calculate size needed */
+ while(*s) {
+ ++n;
+ if(*s == '"' || *s == '\\') {
+ ++n;
+ }
+ ++s;
+ }
+
+ dest = malloc(n);
+ if(dest) {
+ s = source;
+ d = dest;
+ while(*s) {
+ if(*s == '"' || *s == '\\') {
+ *d++ = '\\';
+ }
+ *d++ = *s++;
+ }
+ *d = 0;
+ }
+
+ return dest;
+}
+
+/* Retrieves the value for a corresponding key from the challenge string
+ * returns TRUE if the key could be found, FALSE if it does not exists
+ */
+static bool sasl_digest_get_key_value(const char *chlg,
+ const char *key,
+ char *value,
+ size_t max_val_len,
+ char end_char)
+{
+ char *find_pos;
+ size_t i;
+
+ find_pos = strstr(chlg, key);
+ if(!find_pos)
+ return FALSE;
+
+ find_pos += strlen(key);
+
+ for(i = 0; *find_pos && *find_pos != end_char && i < max_val_len - 1; ++i)
+ value[i] = *find_pos++;
+ value[i] = '\0';
+
+ return TRUE;
+}
+
+static CURLcode sasl_digest_get_qop_values(const char *options, int *value)
+{
+ char *tmp;
+ char *token;
+ char *tok_buf;
+
+ /* Initialise the output */
+ *value = 0;
+
+ /* Tokenise the list of qop values. Use a temporary clone of the buffer since
+ strtok_r() ruins it. */
+ tmp = strdup(options);
+ if(!tmp)
+ return CURLE_OUT_OF_MEMORY;
+
+ token = strtok_r(tmp, ",", &tok_buf);
+ while(token != NULL) {
+ if(Curl_raw_equal(token, DIGEST_QOP_VALUE_STRING_AUTH))
+ *value |= DIGEST_QOP_VALUE_AUTH;
+ else if(Curl_raw_equal(token, DIGEST_QOP_VALUE_STRING_AUTH_INT))
+ *value |= DIGEST_QOP_VALUE_AUTH_INT;
+ else if(Curl_raw_equal(token, DIGEST_QOP_VALUE_STRING_AUTH_CONF))
+ *value |= DIGEST_QOP_VALUE_AUTH_CONF;
+
+ token = strtok_r(NULL, ",", &tok_buf);
+ }
+
+ free(tmp);
+
+ return CURLE_OK;
+}
+
+/*
+ * sasl_decode_digest_md5_message()
+ *
+ * This is used internally to decode an already encoded DIGEST-MD5 challenge
+ * message into the seperate attributes.
+ *
+ * Parameters:
+ *
+ * chlg64 [in] - The base64 encoded challenge message.
+ * nonce [in/out] - The buffer where the nonce will be stored.
+ * nlen [in] - The length of the nonce buffer.
+ * realm [in/out] - The buffer where the realm will be stored.
+ * rlen [in] - The length of the realm buffer.
+ * alg [in/out] - The buffer where the algorithm will be stored.
+ * alen [in] - The length of the algorithm buffer.
+ * qop [in/out] - The buffer where the qop-options will be stored.
+ * qlen [in] - The length of the qop buffer.
+ *
+ * Returns CURLE_OK on success.
+ */
+static CURLcode sasl_decode_digest_md5_message(const char *chlg64,
+ char *nonce, size_t nlen,
+ char *realm, size_t rlen,
+ char *alg, size_t alen,
+ char *qop, size_t qlen)
+{
+ CURLcode result = CURLE_OK;
+ unsigned char *chlg = NULL;
+ size_t chlglen = 0;
+ size_t chlg64len = strlen(chlg64);
+
+ /* Decode the base-64 encoded challenge message */
+ if(chlg64len && *chlg64 != '=') {
+ result = Curl_base64_decode(chlg64, &chlg, &chlglen);
+ if(result)
+ return result;
+ }
+
+ /* Ensure we have a valid challenge message */
+ if(!chlg)
+ return CURLE_BAD_CONTENT_ENCODING;
+
+ /* Retrieve nonce string from the challenge */
+ if(!sasl_digest_get_key_value((char *) chlg, "nonce=\"", nonce, nlen, '\"')) {
+ free(chlg);
+ return CURLE_BAD_CONTENT_ENCODING;
+ }
+
+ /* Retrieve realm string from the challenge */
+ if(!sasl_digest_get_key_value((char *) chlg, "realm=\"", realm, rlen, '\"')) {
+ /* Challenge does not have a realm, set empty string [RFC2831] page 6 */
+ strcpy(realm, "");
+ }
+
+ /* Retrieve algorithm string from the challenge */
+ if(!sasl_digest_get_key_value((char *) chlg, "algorithm=", alg, alen, ',')) {
+ free(chlg);
+ return CURLE_BAD_CONTENT_ENCODING;
+ }
+
+ /* Retrieve qop-options string from the challenge */
+ if(!sasl_digest_get_key_value((char *) chlg, "qop=\"", qop, qlen, '\"')) {
+ free(chlg);
+ return CURLE_BAD_CONTENT_ENCODING;
+ }
+
+ free(chlg);
+
+ return CURLE_OK;
+}
+
+/*
+ * Curl_sasl_create_digest_md5_message()
+ *
+ * This is used to generate an already encoded DIGEST-MD5 response message
+ * ready for sending to the recipient.
+ *
+ * Parameters:
+ *
+ * data [in] - The session handle.
+ * chlg64 [in] - The base64 encoded challenge message.
+ * userp [in] - The user name.
+ * passdwp [in] - The user's password.
+ * service [in] - The service type such as www, smtp, pop or imap.
+ * outptr [in/out] - The address where a pointer to newly allocated memory
+ * holding the result will be stored upon completion.
+ * outlen [out] - The length of the output message.
+ *
+ * Returns CURLE_OK on success.
+ */
+CURLcode Curl_sasl_create_digest_md5_message(struct SessionHandle *data,
+ const char *chlg64,
+ const char *userp,
+ const char *passwdp,
+ const char *service,
+ char **outptr, size_t *outlen)
+{
+ CURLcode result = CURLE_OK;
+ size_t i;
+ MD5_context *ctxt;
+ char *response = NULL;
+ unsigned char digest[MD5_DIGEST_LEN];
+ char HA1_hex[2 * MD5_DIGEST_LEN + 1];
+ char HA2_hex[2 * MD5_DIGEST_LEN + 1];
+ char resp_hash_hex[2 * MD5_DIGEST_LEN + 1];
+ char nonce[64];
+ char realm[128];
+ char algorithm[64];
+ char qop_options[64];
+ int qop_values;
+ char cnonce[33];
+ unsigned int entropy[4];
+ char nonceCount[] = "00000001";
+ char method[] = "AUTHENTICATE";
+ char qop[] = DIGEST_QOP_VALUE_STRING_AUTH;
+ char *spn = NULL;
+
+ /* Decode the challange message */
+ result = sasl_decode_digest_md5_message(chlg64, nonce, sizeof(nonce),
+ realm, sizeof(realm),
+ algorithm, sizeof(algorithm),
+ qop_options, sizeof(qop_options));
+ if(result)
+ return result;
+
+ /* We only support md5 sessions */
+ if(strcmp(algorithm, "md5-sess") != 0)
+ return CURLE_BAD_CONTENT_ENCODING;
+
+ /* Get the qop-values from the qop-options */
+ result = sasl_digest_get_qop_values(qop_options, &qop_values);
+ if(result)
+ return result;
+
+ /* We only support auth quality-of-protection */
+ if(!(qop_values & DIGEST_QOP_VALUE_AUTH))
+ return CURLE_BAD_CONTENT_ENCODING;
+
+ /* Generate 16 bytes of random data */
+ entropy[0] = Curl_rand(data);
+ entropy[1] = Curl_rand(data);
+ entropy[2] = Curl_rand(data);
+ entropy[3] = Curl_rand(data);
+
+ /* Convert the random data into a 32 byte hex string */
+ snprintf(cnonce, sizeof(cnonce), "%08x%08x%08x%08x",
+ entropy[0], entropy[1], entropy[2], entropy[3]);
+
+ /* So far so good, now calculate A1 and H(A1) according to RFC 2831 */
+ ctxt = Curl_MD5_init(Curl_DIGEST_MD5);
+ if(!ctxt)
+ return CURLE_OUT_OF_MEMORY;
+
+ Curl_MD5_update(ctxt, (const unsigned char *) userp,
+ curlx_uztoui(strlen(userp)));
+ Curl_MD5_update(ctxt, (const unsigned char *) ":", 1);
+ Curl_MD5_update(ctxt, (const unsigned char *) realm,
+ curlx_uztoui(strlen(realm)));
+ Curl_MD5_update(ctxt, (const unsigned char *) ":", 1);
+ Curl_MD5_update(ctxt, (const unsigned char *) passwdp,
+ curlx_uztoui(strlen(passwdp)));
+ Curl_MD5_final(ctxt, digest);
+
+ ctxt = Curl_MD5_init(Curl_DIGEST_MD5);
+ if(!ctxt)
+ return CURLE_OUT_OF_MEMORY;
+
+ Curl_MD5_update(ctxt, (const unsigned char *) digest, MD5_DIGEST_LEN);
+ Curl_MD5_update(ctxt, (const unsigned char *) ":", 1);
+ Curl_MD5_update(ctxt, (const unsigned char *) nonce,
+ curlx_uztoui(strlen(nonce)));
+ Curl_MD5_update(ctxt, (const unsigned char *) ":", 1);
+ Curl_MD5_update(ctxt, (const unsigned char *) cnonce,
+ curlx_uztoui(strlen(cnonce)));
+ Curl_MD5_final(ctxt, digest);
+
+ /* Convert calculated 16 octet hex into 32 bytes string */
+ for(i = 0; i < MD5_DIGEST_LEN; i++)
+ snprintf(&HA1_hex[2 * i], 3, "%02x", digest[i]);
+
+ /* Generate our SPN */
+ spn = Curl_sasl_build_spn(service, realm);
+ if(!spn)
+ return CURLE_OUT_OF_MEMORY;
+
+ /* Calculate H(A2) */
+ ctxt = Curl_MD5_init(Curl_DIGEST_MD5);
+ if(!ctxt) {
+ free(spn);
+
+ return CURLE_OUT_OF_MEMORY;
+ }
+
+ Curl_MD5_update(ctxt, (const unsigned char *) method,
+ curlx_uztoui(strlen(method)));
+ Curl_MD5_update(ctxt, (const unsigned char *) ":", 1);
+ Curl_MD5_update(ctxt, (const unsigned char *) spn,
+ curlx_uztoui(strlen(spn)));
+ Curl_MD5_final(ctxt, digest);
+
+ for(i = 0; i < MD5_DIGEST_LEN; i++)
+ snprintf(&HA2_hex[2 * i], 3, "%02x", digest[i]);
+
+ /* Now calculate the response hash */
+ ctxt = Curl_MD5_init(Curl_DIGEST_MD5);
+ if(!ctxt) {
+ free(spn);
+
+ return CURLE_OUT_OF_MEMORY;
+ }
+
+ Curl_MD5_update(ctxt, (const unsigned char *) HA1_hex, 2 * MD5_DIGEST_LEN);
+ Curl_MD5_update(ctxt, (const unsigned char *) ":", 1);
+ Curl_MD5_update(ctxt, (const unsigned char *) nonce,
+ curlx_uztoui(strlen(nonce)));
+ Curl_MD5_update(ctxt, (const unsigned char *) ":", 1);
+
+ Curl_MD5_update(ctxt, (const unsigned char *) nonceCount,
+ curlx_uztoui(strlen(nonceCount)));
+ Curl_MD5_update(ctxt, (const unsigned char *) ":", 1);
+ Curl_MD5_update(ctxt, (const unsigned char *) cnonce,
+ curlx_uztoui(strlen(cnonce)));
+ Curl_MD5_update(ctxt, (const unsigned char *) ":", 1);
+ Curl_MD5_update(ctxt, (const unsigned char *) qop,
+ curlx_uztoui(strlen(qop)));
+ Curl_MD5_update(ctxt, (const unsigned char *) ":", 1);
+
+ Curl_MD5_update(ctxt, (const unsigned char *) HA2_hex, 2 * MD5_DIGEST_LEN);
+ Curl_MD5_final(ctxt, digest);
+
+ for(i = 0; i < MD5_DIGEST_LEN; i++)
+ snprintf(&resp_hash_hex[2 * i], 3, "%02x", digest[i]);
+
+ /* Generate the response */
+ response = aprintf("username=\"%s\",realm=\"%s\",nonce=\"%s\","
+ "cnonce=\"%s\",nc=\"%s\",digest-uri=\"%s\",response=%s,"
+ "qop=%s",
+ userp, realm, nonce,
+ cnonce, nonceCount, spn, resp_hash_hex, qop);
+ free(spn);
+ if(!response)
+ return CURLE_OUT_OF_MEMORY;
+
+ /* Base64 encode the response */
+ result = Curl_base64_encode(data, response, 0, outptr, outlen);
+
+ free(response);
+
+ return result;
+}
+
+/*
+ * Curl_sasl_decode_digest_http_message()
+ *
+ * This is used to decode a HTTP DIGEST challenge message into the seperate
+ * attributes.
+ *
+ * Parameters:
+ *
+ * chlg [in] - The challenge message.
+ * digest [in/out] - The digest data struct being used and modified.
+ *
+ * Returns CURLE_OK on success.
+ */
+CURLcode Curl_sasl_decode_digest_http_message(const char *chlg,
+ struct digestdata *digest)
+{
+ bool before = FALSE; /* got a nonce before */
+ bool foundAuth = FALSE;
+ bool foundAuthInt = FALSE;
+ char *token = NULL;
+ char *tmp = NULL;
+
+ /* If we already have received a nonce, keep that in mind */
+ if(digest->nonce)
+ before = TRUE;
+
+ /* Clean up any former leftovers and initialise to defaults */
+ Curl_sasl_digest_cleanup(digest);
+
+ for(;;) {
+ char value[DIGEST_MAX_VALUE_LENGTH];
+ char content[DIGEST_MAX_CONTENT_LENGTH];
+
+ /* Pass all additional spaces here */
+ while(*chlg && ISSPACE(*chlg))
+ chlg++;
+
+ /* Extract a value=content pair */
+ if(Curl_sasl_digest_get_pair(chlg, value, content, &chlg)) {
+ if(Curl_raw_equal(value, "nonce")) {
+ free(digest->nonce);
+ digest->nonce = strdup(content);
+ if(!digest->nonce)
+ return CURLE_OUT_OF_MEMORY;
+ }
+ else if(Curl_raw_equal(value, "stale")) {
+ if(Curl_raw_equal(content, "true")) {
+ digest->stale = TRUE;
+ digest->nc = 1; /* we make a new nonce now */
+ }
+ }
+ else if(Curl_raw_equal(value, "realm")) {
+ free(digest->realm);
+ digest->realm = strdup(content);
+ if(!digest->realm)
+ return CURLE_OUT_OF_MEMORY;
+ }
+ else if(Curl_raw_equal(value, "opaque")) {
+ free(digest->opaque);
+ digest->opaque = strdup(content);
+ if(!digest->opaque)
+ return CURLE_OUT_OF_MEMORY;
+ }
+ else if(Curl_raw_equal(value, "qop")) {
+ char *tok_buf;
+ /* Tokenize the list and choose auth if possible, use a temporary
+ clone of the buffer since strtok_r() ruins it */
+ tmp = strdup(content);
+ if(!tmp)
+ return CURLE_OUT_OF_MEMORY;
+
+ token = strtok_r(tmp, ",", &tok_buf);
+ while(token != NULL) {
+ if(Curl_raw_equal(token, DIGEST_QOP_VALUE_STRING_AUTH)) {
+ foundAuth = TRUE;
+ }
+ else if(Curl_raw_equal(token, DIGEST_QOP_VALUE_STRING_AUTH_INT)) {
+ foundAuthInt = TRUE;
+ }
+ token = strtok_r(NULL, ",", &tok_buf);
+ }
+
+ free(tmp);
+
+ /* Select only auth or auth-int. Otherwise, ignore */
+ if(foundAuth) {
+ free(digest->qop);
+ digest->qop = strdup(DIGEST_QOP_VALUE_STRING_AUTH);
+ if(!digest->qop)
+ return CURLE_OUT_OF_MEMORY;
+ }
+ else if(foundAuthInt) {
+ free(digest->qop);
+ digest->qop = strdup(DIGEST_QOP_VALUE_STRING_AUTH_INT);
+ if(!digest->qop)
+ return CURLE_OUT_OF_MEMORY;
+ }
+ }
+ else if(Curl_raw_equal(value, "algorithm")) {
+ free(digest->algorithm);
+ digest->algorithm = strdup(content);
+ if(!digest->algorithm)
+ return CURLE_OUT_OF_MEMORY;
+
+ if(Curl_raw_equal(content, "MD5-sess"))
+ digest->algo = CURLDIGESTALGO_MD5SESS;
+ else if(Curl_raw_equal(content, "MD5"))
+ digest->algo = CURLDIGESTALGO_MD5;
+ else
+ return CURLE_BAD_CONTENT_ENCODING;
+ }
+ else {
+ /* Unknown specifier, ignore it! */
+ }
+ }
+ else
+ break; /* We're done here */
+
+ /* Pass all additional spaces here */
+ while(*chlg && ISSPACE(*chlg))
+ chlg++;
+
+ /* Allow the list to be comma-separated */
+ if(',' == *chlg)
+ chlg++;
+ }
+
+ /* We had a nonce since before, and we got another one now without
+ 'stale=true'. This means we provided bad credentials in the previous
+ request */
+ if(before && !digest->stale)
+ return CURLE_BAD_CONTENT_ENCODING;
+
+ /* We got this header without a nonce, that's a bad Digest line! */
+ if(!digest->nonce)
+ return CURLE_BAD_CONTENT_ENCODING;
+
+ return CURLE_OK;
+}
+
+/*
+ * Curl_sasl_create_digest_http_message()
+ *
+ * This is used to generate a HTTP DIGEST response message ready for sending
+ * to the recipient.
+ *
+ * Parameters:
+ *
+ * data [in] - The session handle.
+ * userp [in] - The user name.
+ * passdwp [in] - The user's password.
+ * request [in] - The HTTP request.
+ * uripath [in] - The path of the HTTP uri.
+ * digest [in/out] - The digest data struct being used and modified.
+ * outptr [in/out] - The address where a pointer to newly allocated memory
+ * holding the result will be stored upon completion.
+ * outlen [out] - The length of the output message.
+ *
+ * Returns CURLE_OK on success.
+ */
+CURLcode Curl_sasl_create_digest_http_message(struct SessionHandle *data,
+ const char *userp,
+ const char *passwdp,
+ const unsigned char *request,
+ const unsigned char *uripath,
+ struct digestdata *digest,
+ char **outptr, size_t *outlen)
+{
+ CURLcode result;
+ unsigned char md5buf[16]; /* 16 bytes/128 bits */
+ unsigned char request_digest[33];
+ unsigned char *md5this;
+ unsigned char ha1[33]; /* 32 digits and 1 zero byte */
+ unsigned char ha2[33]; /* 32 digits and 1 zero byte */
+ char cnoncebuf[33];
+ char *cnonce = NULL;
+ size_t cnonce_sz = 0;
+ char *userp_quoted;
+ char *response = NULL;
+ char *tmp = NULL;
+
+ if(!digest->nc)
+ digest->nc = 1;
+
+ if(!digest->cnonce) {
+ snprintf(cnoncebuf, sizeof(cnoncebuf), "%08x%08x%08x%08x",
+ Curl_rand(data), Curl_rand(data),
+ Curl_rand(data), Curl_rand(data));
+
+ result = Curl_base64_encode(data, cnoncebuf, strlen(cnoncebuf),
+ &cnonce, &cnonce_sz);
+ if(result)
+ return result;
+
+ digest->cnonce = cnonce;
+ }
+
+ /*
+ If the algorithm is "MD5" or unspecified (which then defaults to MD5):
+
+ A1 = unq(username-value) ":" unq(realm-value) ":" passwd
+
+ If the algorithm is "MD5-sess" then:
+
+ A1 = H( unq(username-value) ":" unq(realm-value) ":" passwd ) ":"
+ unq(nonce-value) ":" unq(cnonce-value)
+ */
+
+ md5this = (unsigned char *)
+ aprintf("%s:%s:%s", userp, digest->realm, passwdp);
+ if(!md5this)
+ return CURLE_OUT_OF_MEMORY;
+
+ CURL_OUTPUT_DIGEST_CONV(data, md5this); /* convert on non-ASCII machines */
+ Curl_md5it(md5buf, md5this);
+ free(md5this);
+ sasl_digest_md5_to_ascii(md5buf, ha1);
+
+ if(digest->algo == CURLDIGESTALGO_MD5SESS) {
+ /* nonce and cnonce are OUTSIDE the hash */
+ tmp = aprintf("%s:%s:%s", ha1, digest->nonce, digest->cnonce);
+ if(!tmp)
+ return CURLE_OUT_OF_MEMORY;
+
+ CURL_OUTPUT_DIGEST_CONV(data, tmp); /* Convert on non-ASCII machines */
+ Curl_md5it(md5buf, (unsigned char *) tmp);
+ free(tmp);
+ sasl_digest_md5_to_ascii(md5buf, ha1);
+ }
+
+ /*
+ If the "qop" directive's value is "auth" or is unspecified, then A2 is:
+
+ A2 = Method ":" digest-uri-value
+
+ If the "qop" value is "auth-int", then A2 is:
+
+ A2 = Method ":" digest-uri-value ":" H(entity-body)
+
+ (The "Method" value is the HTTP request method as specified in section
+ 5.1.1 of RFC 2616)
+ */
+
+ md5this = (unsigned char *) aprintf("%s:%s", request, uripath);
+
+ if(digest->qop && Curl_raw_equal(digest->qop, "auth-int")) {
+ /* We don't support auth-int for PUT or POST at the moment.
+ TODO: replace md5 of empty string with entity-body for PUT/POST */
+ unsigned char *md5this2 = (unsigned char *)
+ aprintf("%s:%s", md5this, "d41d8cd98f00b204e9800998ecf8427e");
+ free(md5this);
+ md5this = md5this2;
+ }
+
+ if(!md5this)
+ return CURLE_OUT_OF_MEMORY;
+
+ CURL_OUTPUT_DIGEST_CONV(data, md5this); /* convert on non-ASCII machines */
+ Curl_md5it(md5buf, md5this);
+ free(md5this);
+ sasl_digest_md5_to_ascii(md5buf, ha2);
+
+ if(digest->qop) {
+ md5this = (unsigned char *) aprintf("%s:%s:%08x:%s:%s:%s",
+ ha1,
+ digest->nonce,
+ digest->nc,
+ digest->cnonce,
+ digest->qop,
+ ha2);
+ }
+ else {
+ md5this = (unsigned char *) aprintf("%s:%s:%s",
+ ha1,
+ digest->nonce,
+ ha2);
+ }
+
+ if(!md5this)
+ return CURLE_OUT_OF_MEMORY;
+
+ CURL_OUTPUT_DIGEST_CONV(data, md5this); /* convert on non-ASCII machines */
+ Curl_md5it(md5buf, md5this);
+ free(md5this);
+ sasl_digest_md5_to_ascii(md5buf, request_digest);
+
+ /* For test case 64 (snooped from a Mozilla 1.3a request)
+
+ Authorization: Digest username="testuser", realm="testrealm", \
+ nonce="1053604145", uri="/64", response="c55f7f30d83d774a3d2dcacf725abaca"
+
+ Digest parameters are all quoted strings. Username which is provided by
+ the user will need double quotes and backslashes within it escaped. For
+ the other fields, this shouldn't be an issue. realm, nonce, and opaque
+ are copied as is from the server, escapes and all. cnonce is generated
+ with web-safe characters. uri is already percent encoded. nc is 8 hex
+ characters. algorithm and qop with standard values only contain web-safe
+ characters.
+ */
+ userp_quoted = sasl_digest_string_quoted(userp);
+ if(!userp_quoted)
+ return CURLE_OUT_OF_MEMORY;
+
+ if(digest->qop) {
+ response = aprintf("username=\"%s\", "
+ "realm=\"%s\", "
+ "nonce=\"%s\", "
+ "uri=\"%s\", "
+ "cnonce=\"%s\", "
+ "nc=%08x, "
+ "qop=%s, "
+ "response=\"%s\"",
+ userp_quoted,
+ digest->realm,
+ digest->nonce,
+ uripath,
+ digest->cnonce,
+ digest->nc,
+ digest->qop,
+ request_digest);
+
+ if(Curl_raw_equal(digest->qop, "auth"))
+ digest->nc++; /* The nc (from RFC) has to be a 8 hex digit number 0
+ padded which tells to the server how many times you are
+ using the same nonce in the qop=auth mode */
+ }
+ else {
+ response = aprintf("username=\"%s\", "
+ "realm=\"%s\", "
+ "nonce=\"%s\", "
+ "uri=\"%s\", "
+ "response=\"%s\"",
+ userp_quoted,
+ digest->realm,
+ digest->nonce,
+ uripath,
+ request_digest);
+ }
+ free(userp_quoted);
+ if(!response)
+ return CURLE_OUT_OF_MEMORY;
+
+ /* Add the optional fields */
+ if(digest->opaque) {
+ /* Append the opaque */
+ tmp = aprintf("%s, opaque=\"%s\"", response, digest->opaque);
+ free(response);
+ if(!tmp)
+ return CURLE_OUT_OF_MEMORY;
+
+ response = tmp;
+ }
+
+ if(digest->algorithm) {
+ /* Append the algorithm */
+ tmp = aprintf("%s, algorithm=\"%s\"", response, digest->algorithm);
+ free(response);
+ if(!tmp)
+ return CURLE_OUT_OF_MEMORY;
+
+ response = tmp;
+ }
+
+ /* Return the output */
+ *outptr = response;
+ *outlen = strlen(response);
+
+ return CURLE_OK;
+}
+
+/*
+ * Curl_sasl_digest_cleanup()
+ *
+ * This is used to clean up the digest specific data.
+ *
+ * Parameters:
+ *
+ * digest [in/out] - The digest data struct being cleaned up.
+ *
+ */
+void Curl_sasl_digest_cleanup(struct digestdata *digest)
+{
+ Curl_safefree(digest->nonce);
+ Curl_safefree(digest->cnonce);
+ Curl_safefree(digest->realm);
+ Curl_safefree(digest->opaque);
+ Curl_safefree(digest->qop);
+ Curl_safefree(digest->algorithm);
+
+ digest->nc = 0;
+ digest->algo = CURLDIGESTALGO_MD5; /* default algorithm */
+ digest->stale = FALSE; /* default means normal, not stale */
+}
+#endif /* !USE_WINDOWS_SSPI */
+
+#endif /* CURL_DISABLE_CRYPTO_AUTH */
diff --git a/lib/vauth/digest.h b/lib/vauth/digest.h
new file mode 100644
index 000000000..4c58f002c
--- /dev/null
+++ b/lib/vauth/digest.h
@@ -0,0 +1,43 @@
+#ifndef HEADER_CURL_DIGEST_H
+#define HEADER_CURL_DIGEST_H
+/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at http://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+
+#include <curl/curl.h>
+
+#if !defined(CURL_DISABLE_CRYPTO_AUTH)
+
+#define DIGEST_MAX_VALUE_LENGTH 256
+#define DIGEST_MAX_CONTENT_LENGTH 1024
+
+enum {
+ CURLDIGESTALGO_MD5,
+ CURLDIGESTALGO_MD5SESS
+};
+
+/* This is used to extract the realm from a challenge message */
+bool Curl_sasl_digest_get_pair(const char *str, char *value, char *content,
+ const char **endptr);
+
+#endif
+
+#endif /* HEADER_CURL_DIGEST_H */
diff --git a/lib/vauth/digest_sspi.c b/lib/vauth/digest_sspi.c
new file mode 100644
index 000000000..802c02b54
--- /dev/null
+++ b/lib/vauth/digest_sspi.c
@@ -0,0 +1,527 @@
+/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 2014 - 2015, Steve Holme, <steve_holme@hotmail.com>.
+ * Copyright (C) 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at http://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ * RFC2831 DIGEST-MD5 authentication
+ *
+ ***************************************************************************/
+
+#include "curl_setup.h"
+
+#if defined(USE_WINDOWS_SSPI) && !defined(CURL_DISABLE_CRYPTO_AUTH)
+
+#include <curl/curl.h>
+
+#include "vauth/vauth.h"
+#include "vauth/digest.h"
+#include "urldata.h"
+#include "curl_base64.h"
+#include "warnless.h"
+#include "curl_multibyte.h"
+#include "sendf.h"
+#include "strdup.h"
+#include "rawstr.h"
+
+/* The last #include files should be: */
+#include "curl_memory.h"
+#include "memdebug.h"
+
+/*
+ * Curl_sasl_create_digest_md5_message()
+ *
+ * This is used to generate an already encoded DIGEST-MD5 response message
+ * ready for sending to the recipient.
+ *
+ * Parameters:
+ *
+ * data [in] - The session handle.
+ * chlg64 [in] - The base64 encoded challenge message.
+ * userp [in] - The user name in the format User or Domain\User.
+ * passdwp [in] - The user's password.
+ * service [in] - The service type such as www, smtp, pop or imap.
+ * outptr [in/out] - The address where a pointer to newly allocated memory
+ * holding the result will be stored upon completion.
+ * outlen [out] - The length of the output message.
+ *
+ * Returns CURLE_OK on success.
+ */
+CURLcode Curl_sasl_create_digest_md5_message(struct SessionHandle *data,
+ const char *chlg64,
+ const char *userp,
+ const char *passwdp,
+ const char *service,
+ char **outptr, size_t *outlen)
+{
+ CURLcode result = CURLE_OK;
+ TCHAR *spn = NULL;
+ size_t chlglen = 0;
+ size_t token_max = 0;
+ unsigned char *input_token = NULL;
+ unsigned char *output_token = NULL;
+ CredHandle credentials;
+ CtxtHandle context;
+ PSecPkgInfo SecurityPackage;
+ SEC_WINNT_AUTH_IDENTITY identity;
+ SEC_WINNT_AUTH_IDENTITY *p_identity;
+ SecBuffer chlg_buf;
+ SecBuffer resp_buf;
+ SecBufferDesc chlg_desc;
+ SecBufferDesc resp_desc;
+ SECURITY_STATUS status;
+ unsigned long attrs;
+ TimeStamp expiry; /* For Windows 9x compatibility of SSPI calls */
+
+ /* Decode the base-64 encoded challenge message */
+ if(strlen(chlg64) && *chlg64 != '=') {
+ result = Curl_base64_decode(chlg64, &input_token, &chlglen);
+ if(result)
+ return result;
+ }
+
+ /* Ensure we have a valid challenge message */
+ if(!input_token) {
+ infof(data, "DIGEST-MD5 handshake failure (empty challenge message)\n");
+
+ return CURLE_BAD_CONTENT_ENCODING;
+ }
+
+ /* Query the security package for DigestSSP */
+ status = s_pSecFn->QuerySecurityPackageInfo((TCHAR *) TEXT(SP_NAME_DIGEST),
+ &SecurityPackage);
+ if(status != SEC_E_OK) {
+ free(input_token);
+
+ return CURLE_NOT_BUILT_IN;
+ }
+
+ token_max = SecurityPackage->cbMaxToken;
+
+ /* Release the package buffer as it is not required anymore */
+ s_pSecFn->FreeContextBuffer(SecurityPackage);
+
+ /* Allocate our response buffer */
+ output_token = malloc(token_max);
+ if(!output_token) {
+ free(input_token);
+
+ return CURLE_OUT_OF_MEMORY;
+ }
+
+ /* Generate our SPN */
+ spn = Curl_sasl_build_spn(service, data->easy_conn->host.name);
+ if(!spn) {
+ free(output_token);
+ free(input_token);
+
+ return CURLE_OUT_OF_MEMORY;
+ }
+
+ if(userp && *userp) {
+ /* Populate our identity structure */
+ result = Curl_create_sspi_identity(userp, passwdp, &identity);
+ if(result) {
+ free(spn);
+ free(output_token);
+ free(input_token);
+
+ return result;
+ }
+
+ /* Allow proper cleanup of the identity structure */
+ p_identity = &identity;
+ }
+ else
+ /* Use the current Windows user */
+ p_identity = NULL;
+
+ /* Acquire our credentials handle */
+ status = s_pSecFn->AcquireCredentialsHandle(NULL,
+ (TCHAR *) TEXT(SP_NAME_DIGEST),
+ SECPKG_CRED_OUTBOUND, NULL,
+ p_identity, NULL, NULL,
+ &credentials, &expiry);
+
+ if(status != SEC_E_OK) {
+ Curl_sspi_free_identity(p_identity);
+ free(spn);
+ free(output_token);
+ free(input_token);
+
+ return CURLE_LOGIN_DENIED;
+ }
+
+ /* Setup the challenge "input" security buffer */
+ chlg_desc.ulVersion = SECBUFFER_VERSION;
+ chlg_desc.cBuffers = 1;
+ chlg_desc.pBuffers = &chlg_buf;
+ chlg_buf.BufferType = SECBUFFER_TOKEN;
+ chlg_buf.pvBuffer = input_token;
+ chlg_buf.cbBuffer = curlx_uztoul(chlglen);
+
+ /* Setup the response "output" security buffer */
+ resp_desc.ulVersion = SECBUFFER_VERSION;
+ resp_desc.cBuffers = 1;
+ resp_desc.pBuffers = &resp_buf;
+ resp_buf.BufferType = SECBUFFER_TOKEN;
+ resp_buf.pvBuffer = output_token;
+ resp_buf.cbBuffer = curlx_uztoul(token_max);
+
+ /* Generate our response message */
+ status = s_pSecFn->InitializeSecurityContext(&credentials, NULL, spn,
+ 0, 0, 0, &chlg_desc, 0,
+ &context, &resp_desc, &attrs,
+ &expiry);
+
+ if(status == SEC_I_COMPLETE_NEEDED ||
+ status == SEC_I_COMPLETE_AND_CONTINUE)
+ s_pSecFn->CompleteAuthToken(&credentials, &resp_desc);
+ else if(status != SEC_E_OK && status != SEC_I_CONTINUE_NEEDED) {
+ s_pSecFn->FreeCredentialsHandle(&credentials);
+ Curl_sspi_free_identity(p_identity);
+ free(spn);
+ free(output_token);
+ free(input_token);
+
+ return CURLE_RECV_ERROR;
+ }
+
+ /* Base64 encode the response */
+ result = Curl_base64_encode(data, (char *) output_token, resp_buf.cbBuffer,
+ outptr, outlen);
+
+ /* Free our handles */
+ s_pSecFn->DeleteSecurityContext(&context);
+ s_pSecFn->FreeCredentialsHandle(&credentials);
+
+ /* Free the identity structure */
+ Curl_sspi_free_identity(p_identity);
+
+ /* Free the SPN */
+ free(spn);
+
+ /* Free the response buffer */
+ free(output_token);
+
+ /* Free the decoded challenge message */
+ free(input_token);
+
+ return result;
+}
+
+/*
+ * Curl_override_sspi_http_realm()
+ *
+ * This is used to populate the domain in a SSPI identity structure
+ * The realm is extracted from the challenge message and used as the
+ * domain if it is not already explicitly set.
+ *
+ * Parameters:
+ *
+ * chlg [in] - The challenge message.
+ * identity [in/out] - The identity structure.
+ *
+ * Returns CURLE_OK on success.
+ */
+CURLcode Curl_override_sspi_http_realm(const char *chlg,
+ SEC_WINNT_AUTH_IDENTITY *identity)
+{
+ xcharp_u domain, dup_domain;
+
+ /* If domain is blank or unset, check challenge message for realm */
+ if(!identity->Domain || !identity->DomainLength) {
+ for(;;) {
+ char value[DIGEST_MAX_VALUE_LENGTH];
+ char content[DIGEST_MAX_CONTENT_LENGTH];
+
+ /* Pass all additional spaces here */
+ while(*chlg && ISSPACE(*chlg))
+ chlg++;
+
+ /* Extract a value=content pair */
+ if(Curl_sasl_digest_get_pair(chlg, value, content, &chlg)) {
+ if(Curl_raw_equal(value, "realm")) {
+
+ /* Setup identity's domain and length */
+ domain.tchar_ptr = Curl_convert_UTF8_to_tchar((char *) content);
+ if(!domain.tchar_ptr)
+ return CURLE_OUT_OF_MEMORY;
+
+ dup_domain.tchar_ptr = _tcsdup(domain.tchar_ptr);
+ if(!dup_domain.tchar_ptr) {
+ Curl_unicodefree(domain.tchar_ptr);
+ return CURLE_OUT_OF_MEMORY;
+ }
+
+ free(identity->Domain);
+ identity->Domain = dup_domain.tbyte_ptr;
+ identity->DomainLength = curlx_uztoul(_tcslen(dup_domain.tchar_ptr));
+ dup_domain.tchar_ptr = NULL;
+
+ Curl_unicodefree(domain.tchar_ptr);
+ }
+ else {
+ /* Unknown specifier, ignore it! */
+ }
+ }
+ else
+ break; /* We're done here */
+
+ /* Pass all additional spaces here */
+ while(*chlg && ISSPACE(*chlg))
+ chlg++;
+
+ /* Allow the list to be comma-separated */
+ if(',' == *chlg)
+ chlg++;
+ }
+ }
+
+ return CURLE_OK;
+}
+
+/*
+ * Curl_sasl_decode_digest_http_message()
+ *
+ * This is used to decode a HTTP DIGEST challenge message into the seperate
+ * attributes.
+ *
+ * Parameters:
+ *
+ * chlg [in] - The challenge message.
+ * digest [in/out] - The digest data struct being used and modified.
+ *
+ * Returns CURLE_OK on success.
+ */
+CURLcode Curl_sasl_decode_digest_http_message(const char *chlg,
+ struct digestdata *digest)
+{
+ size_t chlglen = strlen(chlg);
+
+ /* We had an input token before and we got another one now. This means we
+ provided bad credentials in the previous request. */
+ if(digest->input_token)
+ return CURLE_BAD_CONTENT_ENCODING;
+
+ /* Simply store the challenge for use later */
+ digest->input_token = (BYTE *) Curl_memdup(chlg, chlglen);
+ if(!digest->input_token)
+ return CURLE_OUT_OF_MEMORY;
+
+ digest->input_token_len = chlglen;
+
+ return CURLE_OK;
+}
+
+/*
+ * Curl_sasl_create_digest_http_message()
+ *
+ * This is used to generate a HTTP DIGEST response message ready for sending
+ * to the recipient.
+ *
+ * Parameters:
+ *
+ * data [in] - The session handle.
+ * userp [in] - The user name in the format User or Domain\User.
+ * passdwp [in] - The user's password.
+ * request [in] - The HTTP request.
+ * uripath [in] - The path of the HTTP uri.
+ * digest [in/out] - The digest data struct being used and modified.
+ * outptr [in/out] - The address where a pointer to newly allocated memory
+ * holding the result will be stored upon completion.
+ * outlen [out] - The length of the output message.
+ *
+ * Returns CURLE_OK on success.
+ */
+CURLcode Curl_sasl_create_digest_http_message(struct SessionHandle *data,
+ const char *userp,
+ const char *passwdp,
+ const unsigned char *request,
+ const unsigned char *uripath,
+ struct digestdata *digest,
+ char **outptr, size_t *outlen)
+{
+ size_t token_max;
+ CredHandle credentials;
+ CtxtHandle context;
+ char *resp;
+ BYTE *output_token;
+ PSecPkgInfo SecurityPackage;
+ SEC_WINNT_AUTH_IDENTITY identity;
+ SEC_WINNT_AUTH_IDENTITY *p_identity;
+ SecBuffer chlg_buf[3];
+ SecBuffer resp_buf;
+ SecBufferDesc chlg_desc;
+ SecBufferDesc resp_desc;
+ SECURITY_STATUS status;
+ unsigned long attrs;
+ TimeStamp expiry; /* For Windows 9x compatibility of SSPI calls */
+ TCHAR *spn;
+
+ (void) data;
+
+ /* Query the security package for DigestSSP */
+ status = s_pSecFn->QuerySecurityPackageInfo((TCHAR *) TEXT(SP_NAME_DIGEST),
+ &SecurityPackage);
+ if(status != SEC_E_OK)
+ return CURLE_NOT_BUILT_IN;
+
+ token_max = SecurityPackage->cbMaxToken;
+
+ /* Release the package buffer as it is not required anymore */
+ s_pSecFn->FreeContextBuffer(SecurityPackage);
+
+ /* Allocate the output buffer according to the max token size as indicated
+ by the security package */
+ output_token = malloc(token_max);
+ if(!output_token)
+ return CURLE_OUT_OF_MEMORY;
+
+ if(userp && *userp) {
+ /* Populate our identity structure */
+ if(Curl_create_sspi_identity(userp, passwdp, &identity))
+ return CURLE_OUT_OF_MEMORY;
+
+ /* Populate our identity domain */
+ if(Curl_override_sspi_http_realm((const char*) digest->input_token,
+ &identity))
+ return CURLE_OUT_OF_MEMORY;
+
+ /* Allow proper cleanup of the identity structure */
+ p_identity = &identity;
+ }
+ else
+ /* Use the current Windows user */
+ p_identity = NULL;
+
+ /* Acquire our credentials handle */
+ status = s_pSecFn->AcquireCredentialsHandle(NULL,
+ (TCHAR *) TEXT(SP_NAME_DIGEST),
+ SECPKG_CRED_OUTBOUND, NULL,
+ p_identity, NULL, NULL,
+ &credentials, &expiry);
+ if(status != SEC_E_OK) {
+ Curl_sspi_free_identity(p_identity);
+ free(output_token);
+
+ return CURLE_LOGIN_DENIED;
+ }
+
+ /* Setup the challenge "input" security buffer if present */
+ chlg_desc.ulVersion = SECBUFFER_VERSION;
+ chlg_desc.cBuffers = 3;
+ chlg_desc.pBuffers = chlg_buf;
+ chlg_buf[0].BufferType = SECBUFFER_TOKEN;
+ chlg_buf[0].pvBuffer = digest->input_token;
+ chlg_buf[0].cbBuffer = curlx_uztoul(digest->input_token_len);
+ chlg_buf[1].BufferType = SECBUFFER_PKG_PARAMS;
+ chlg_buf[1].pvBuffer = (void *) request;
+ chlg_buf[1].cbBuffer = curlx_uztoul(strlen((const char *) request));
+ chlg_buf[2].BufferType = SECBUFFER_PKG_PARAMS;
+ chlg_buf[2].pvBuffer = NULL;
+ chlg_buf[2].cbBuffer = 0;
+
+ /* Setup the response "output" security buffer */
+ resp_desc.ulVersion = SECBUFFER_VERSION;
+ resp_desc.cBuffers = 1;
+ resp_desc.pBuffers = &resp_buf;
+ resp_buf.BufferType = SECBUFFER_TOKEN;
+ resp_buf.pvBuffer = output_token;
+ resp_buf.cbBuffer = curlx_uztoul(token_max);
+
+ spn = Curl_convert_UTF8_to_tchar((char *) uripath);
+ if(!spn) {
+ Curl_sspi_free_identity(p_identity);
+ free(output_token);
+
+ return CURLE_OUT_OF_MEMORY;
+ }
+
+ /* Generate our reponse message */
+ status = s_pSecFn->InitializeSecurityContext(&credentials, NULL,
+ spn,
+ ISC_REQ_USE_HTTP_STYLE, 0, 0,
+ &chlg_desc, 0, &context,
+ &resp_desc, &attrs, &expiry);
+ Curl_unicodefree(spn);
+
+ if(status == SEC_I_COMPLETE_NEEDED ||
+ status == SEC_I_COMPLETE_AND_CONTINUE)
+ s_pSecFn->CompleteAuthToken(&credentials, &resp_desc);
+ else if(status != SEC_E_OK && status != SEC_I_CONTINUE_NEEDED) {
+ s_pSecFn->FreeCredentialsHandle(&credentials);
+
+ Curl_sspi_free_identity(p_identity);
+ free(output_token);
+
+ return CURLE_OUT_OF_MEMORY;
+ }
+
+ resp = malloc(resp_buf.cbBuffer + 1);
+ if(!resp) {
+ s_pSecFn->DeleteSecurityContext(&context);
+ s_pSecFn->FreeCredentialsHandle(&credentials);
+
+ Curl_sspi_free_identity(p_identity);
+ free(output_token);
+
+ return CURLE_OUT_OF_MEMORY;
+ }
+
+ /* Copy the generated reponse */
+ memcpy(resp, resp_buf.pvBuffer, resp_buf.cbBuffer);
+ resp[resp_buf.cbBuffer] = 0x00;
+
+ /* Return the response */
+ *outptr = resp;
+ *outlen = resp_buf.cbBuffer;
+
+ /* Free our handles */
+ s_pSecFn->DeleteSecurityContext(&context);
+ s_pSecFn->FreeCredentialsHandle(&credentials);
+
+ /* Free the identity structure */
+ Curl_sspi_free_identity(p_identity);
+
+ /* Free the response buffer */
+ free(output_token);
+
+ return CURLE_OK;
+}
+
+/*
+ * Curl_sasl_digest_cleanup()
+ *
+ * This is used to clean up the digest specific data.
+ *
+ * Parameters:
+ *
+ * digest [in/out] - The digest data struct being cleaned up.
+ *
+ */
+void Curl_sasl_digest_cleanup(struct digestdata *digest)
+{
+ /* Free the input token */
+ Curl_safefree(digest->input_token);
+
+ /* Reset any variables */
+ digest->input_token_len = 0;
+}
+
+#endif /* USE_WINDOWS_SSPI && !CURL_DISABLE_CRYPTO_AUTH */
diff --git a/lib/vauth/vauth.h b/lib/vauth/vauth.h
index 7469ccd8b..71afc40b9 100644
--- a/lib/vauth/vauth.h
+++ b/lib/vauth/vauth.h
@@ -26,6 +26,10 @@
struct SessionHandle;
+#if !defined(CURL_DISABLE_CRYPTO_AUTH)
+struct digestdata;
+#endif
+
/* This is used to build a SPN string */
#if !defined(USE_WINDOWS_SSPI)
char *Curl_sasl_build_spn(const char *service, const char *instance);
@@ -64,6 +68,30 @@ CURLcode sasl_create_cram_md5_message(struct SessionHandle *data,
const char *userp,
const char *passwdp,
char **outptr, size_t *outlen);
+
+/* This is used to generate a base64 encoded DIGEST-MD5 response message */
+CURLcode Curl_sasl_create_digest_md5_message(struct SessionHandle *data,
+ const char *chlg64,
+ const char *userp,
+ const char *passwdp,
+ const char *service,
+ char **outptr, size_t *outlen);
+
+/* This is used to decode a HTTP DIGEST challenge message */
+CURLcode Curl_sasl_decode_digest_http_message(const char *chlg,
+ struct digestdata *digest);
+
+/* This is used to generate a HTTP DIGEST response message */
+CURLcode Curl_sasl_create_digest_http_message(struct SessionHandle *data,
+ const char *userp,
+ const char *passwdp,
+ const unsigned char *request,
+ const unsigned char *uri,
+ struct digestdata *digest,
+ char **outptr, size_t *outlen);
+
+/* This is used to clean up the digest specific data */
+void Curl_sasl_digest_cleanup(struct digestdata *digest);
#endif /* !CURL_DISABLE_CRYPTO_AUTH */
#endif /* HEADER_CURL_VAUTH_H */
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