* KIND, either express or implied.
*
* RFC2195 CRAM-MD5 authentication
+ * RFC2617 Basic and Digest Access Authentication
* RFC2831 DIGEST-MD5 authentication
* RFC4422 Simple Authentication and Security Layer (SASL)
* RFC4616 PLAIN authentication
extern void Curl_sasl_gssapi_cleanup(struct kerberos5data *krb5);
#endif
-#if !defined(CURL_DISABLE_CRYPTO_AUTH) && !defined(USE_WINDOWS_SSPI)
+#if !defined(CURL_DISABLE_CRYPTO_AUTH)
+
+#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)
+#endif /* !USE_WINDOWS_SSPI */
#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"
+#define DIGEST_MAX_VALUE_LENGTH 256
+#define DIGEST_MAX_CONTENT_LENGTH 1024
+
+/*
+ * Return 0 on success and then the buffers are filled in fine.
+ *
+ * Non-zero means failure to parse.
+ */
+static int 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 1;
+
+ 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 0; /* all is fine! */
+}
+
+#if !defined(USE_WINDOWS_SSPI)
/* 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
*/
return CURLE_OK;
}
-#endif
+#endif /* !USE_WINDOWS_SSPI */
+
+#endif /* !CURL_DISABLE_CRYPTO_AUTH */
#if !defined(USE_WINDOWS_SSPI)
/*
}
#endif /* !USE_WINDOWS_SSPI */
+/*
+ * Curl_sasl_decode_digest_http_message()
+ *
+ * This is used to decode a HTTP DIGEST challenge message into the seperate
+ * attributes.
+ *
+ * Parameters:
+ *
+ * chlg [in] - Pointer to 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];
+
+ /* Extract a value=content pair */
+ if(!sasl_digest_get_pair(chlg, value, content, &chlg)) {
+ if(Curl_raw_equal(value, "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")) {
+ digest->realm = strdup(content);
+ if(!digest->realm)
+ return CURLE_OUT_OF_MEMORY;
+ }
+ else if(Curl_raw_equal(value, "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 o auth-int. Otherwise, ignore */
+ if(foundAuth) {
+ digest->qop = strdup(DIGEST_QOP_VALUE_STRING_AUTH);
+ if(!digest->qop)
+ return CURLE_OUT_OF_MEMORY;
+ }
+ else if(foundAuthInt) {
+ digest->qop = strdup(DIGEST_QOP_VALUE_STRING_AUTH_INT);
+ if(!digest->qop)
+ return CURLE_OUT_OF_MEMORY;
+ }
+ }
+ else if(Curl_raw_equal(value, "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_digest_cleanup()
*
/* The last #include file should be: */
#include "memdebug.h"
-#define MAX_VALUE_LENGTH 256
-#define MAX_CONTENT_LENGTH 1024
-
-/*
- * Return 0 on success and then the buffers are filled in fine.
- *
- * Non-zero means failure to parse.
- */
-static int get_pair(const char *str, char *value, char *content,
- const char **endptr)
-{
- int c;
- bool starts_with_quote = FALSE;
- bool escape = FALSE;
-
- for(c=MAX_VALUE_LENGTH-1; (*str && (*str != '=') && c--); )
- *value++ = *str++;
- *value=0;
-
- if('=' != *str++)
- /* eek, no match */
- return 1;
-
- if('\"' == *str) {
- /* this starts with a quote so it must end with one as well! */
- str++;
- starts_with_quote = TRUE;
- }
-
- for(c=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 0; /* all is fine! */
-}
-
/* Test example headers:
WWW-Authenticate: Digest realm="testrealm", nonce="1053604598"
const char *header) /* rest of the *-authenticate:
header */
{
- char *token = NULL;
- char *tmp = NULL;
- bool foundAuth = FALSE;
- bool foundAuthInt = FALSE;
struct SessionHandle *data=conn->data;
- bool before = FALSE; /* got a nonce before */
struct digestdata *d;
if(proxy) {
d = &data->state.digest;
}
- if(checkprefix("Digest", header)) {
- header += strlen("Digest");
-
- /* If we already have received a nonce, keep that in mind */
- if(d->nonce)
- before = TRUE;
-
- /* clear off any former leftovers and init to defaults */
- Curl_sasl_digest_cleanup(d);
-
- for(;;) {
- char value[MAX_VALUE_LENGTH];
- char content[MAX_CONTENT_LENGTH];
-
- while(*header && ISSPACE(*header))
- header++;
-
- /* extract a value=content pair */
- if(!get_pair(header, value, content, &header)) {
- if(Curl_raw_equal(value, "nonce")) {
- d->nonce = strdup(content);
- if(!d->nonce)
- return CURLE_OUT_OF_MEMORY;
- }
- else if(Curl_raw_equal(value, "stale")) {
- if(Curl_raw_equal(content, "true")) {
- d->stale = TRUE;
- d->nc = 1; /* we make a new nonce now */
- }
- }
- else if(Curl_raw_equal(value, "realm")) {
- d->realm = strdup(content);
- if(!d->realm)
- return CURLE_OUT_OF_MEMORY;
- }
- else if(Curl_raw_equal(value, "opaque")) {
- d->opaque = strdup(content);
- if(!d->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, "auth")) {
- foundAuth = TRUE;
- }
- else if(Curl_raw_equal(token, "auth-int")) {
- foundAuthInt = TRUE;
- }
- token = strtok_r(NULL, ",", &tok_buf);
- }
- free(tmp);
- /*select only auth o auth-int. Otherwise, ignore*/
- if(foundAuth) {
- d->qop = strdup("auth");
- if(!d->qop)
- return CURLE_OUT_OF_MEMORY;
- }
- else if(foundAuthInt) {
- d->qop = strdup("auth-int");
- if(!d->qop)
- return CURLE_OUT_OF_MEMORY;
- }
- }
- else if(Curl_raw_equal(value, "algorithm")) {
- d->algorithm = strdup(content);
- if(!d->algorithm)
- return CURLE_OUT_OF_MEMORY;
-
- if(Curl_raw_equal(content, "MD5-sess"))
- d->algo = CURLDIGESTALGO_MD5SESS;
- else if(Curl_raw_equal(content, "MD5"))
- d->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(*header && ISSPACE(*header))
- header++;
- if(',' == *header)
- /* allow the list to be comma-separated */
- header++;
- }
- /* 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 && !d->stale)
- return CURLE_BAD_CONTENT_ENCODING;
-
- /* We got this header without a nonce, that's a bad Digest line! */
- if(!d->nonce)
- return CURLE_BAD_CONTENT_ENCODING;
- }
- else
- /* else not a digest, get out */
+ if(!checkprefix("Digest", header))
return CURLE_BAD_CONTENT_ENCODING;
- return CURLE_OK;
+ header += strlen("Digest");
+ while(*header && ISSPACE(*header))
+ header++;
+
+ return Curl_sasl_decode_digest_http_message(header, d);
}
/* convert md5 chunk to RFC2617 (section 3.1.3) -suitable ascii string*/
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