diff options
Diffstat (limited to 'lib/curl_sasl.c')
| -rw-r--r-- | lib/curl_sasl.c | 837 |
1 files changed, 0 insertions, 837 deletions
diff --git a/lib/curl_sasl.c b/lib/curl_sasl.c index f54e7b1cc..c57bc37a7 100644 --- a/lib/curl_sasl.c +++ b/lib/curl_sasl.c @@ -70,843 +70,6 @@ const struct { { ZERO_NULL, 0, 0 } }; -#if !defined(CURL_DISABLE_CRYPTO_AUTH) && !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 - -#if !defined(CURL_DISABLE_CRYPTO_AUTH) -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 */ - #if defined(USE_NTLM) && !defined(USE_WINDOWS_SSPI) /* * Curl_sasl_ntlm_cleanup() |