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-rw-r--r--third_party/heimdal/lib/ntlm/digest.c994
1 files changed, 994 insertions, 0 deletions
diff --git a/third_party/heimdal/lib/ntlm/digest.c b/third_party/heimdal/lib/ntlm/digest.c
new file mode 100644
index 0000000..42c39ff
--- /dev/null
+++ b/third_party/heimdal/lib/ntlm/digest.c
@@ -0,0 +1,994 @@
+/*
+ * Copyright (c) 2006 - 2008 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * All rights reserved.
+ *
+ * Portions Copyright (c) 2010 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the Institute nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/types.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <CommonCrypto/CommonDigest.h>
+#include <CommonCrypto/CommonHMAC.h>
+#include <assert.h>
+#include <roken.h>
+#include <hex.h>
+#include "heim-auth.h"
+#include "ntlm_err.h"
+
+struct heim_digest_desc {
+#define F_SERVER 1
+#define F_HAVE_HASH 2
+#define F_HAVE_HA1 4
+#define F_USE_PREFIX 8
+ int flags;
+ int type;
+ char *password;
+ uint8_t SecretHash[CC_MD5_DIGEST_LENGTH];
+ char *serverNonce;
+ char *serverRealm;
+ char *serverQOP;
+ char *serverMethod;
+ char *serverMaxbuf;
+ char *serverOpaque;
+ char *clientUsername;
+ char *clientResponse;
+ char *clientURI;
+ char *clientRealm;
+ char *clientNonce;
+ char *clientQOP;
+ char *clientNC;
+ char *serverAlgorithm;
+ char *auth_id;
+
+ /* internally allocated objects returned to caller */
+ char *serverChallenge;
+ char *clientReply;
+ char *serverReply;
+};
+
+#define FREE_AND_CLEAR(x) do { if ((x)) { free((x)); (x) = NULL; } } while(0)
+#define MEMSET_FREE_AND_CLEAR(x) do { if ((x)) { memset(x, 0, strlen(x)); free((x)); (x) = NULL; } } while(0)
+
+static const char digest_prefix[] = "Digest ";
+
+static void
+clear_context(heim_digest_t context)
+{
+ MEMSET_FREE_AND_CLEAR(context->password);
+ memset(context->SecretHash, 0, sizeof(context->SecretHash));
+ context->flags &= ~(F_HAVE_HASH);
+ FREE_AND_CLEAR(context->serverNonce);
+ FREE_AND_CLEAR(context->serverRealm);
+ FREE_AND_CLEAR(context->serverQOP);
+ FREE_AND_CLEAR(context->serverMethod);
+ FREE_AND_CLEAR(context->serverMaxbuf);
+ FREE_AND_CLEAR(context->serverOpaque);
+ FREE_AND_CLEAR(context->clientUsername);
+ FREE_AND_CLEAR(context->clientResponse);
+ FREE_AND_CLEAR(context->clientURI);
+ FREE_AND_CLEAR(context->clientRealm);
+ FREE_AND_CLEAR(context->clientNonce);
+ FREE_AND_CLEAR(context->clientQOP);
+ FREE_AND_CLEAR(context->clientNC);
+ FREE_AND_CLEAR(context->serverAlgorithm);
+ FREE_AND_CLEAR(context->auth_id);
+
+ FREE_AND_CLEAR(context->serverChallenge);
+ FREE_AND_CLEAR(context->clientReply);
+ FREE_AND_CLEAR(context->serverReply);
+}
+
+static void
+digest_userhash(const char *user, const char *realm, const char *password,
+ unsigned char md[CC_MD5_DIGEST_LENGTH])
+{
+ CC_MD5_CTX ctx;
+
+ CC_MD5_Init(&ctx);
+ CC_MD5_Update(&ctx, user, (CC_LONG)strlen(user));
+ CC_MD5_Update(&ctx, ":", 1);
+ CC_MD5_Update(&ctx, realm, (CC_LONG)strlen(realm));
+ CC_MD5_Update(&ctx, ":", 1);
+ CC_MD5_Update(&ctx, password, (CC_LONG)strlen(password));
+ CC_MD5_Final(md, &ctx);
+}
+
+static char *
+build_A1_hash(heim_digest_t context)
+{
+ unsigned char md[CC_MD5_DIGEST_LENGTH];
+ CC_MD5_CTX ctx;
+ char *A1;
+
+ if (context->flags & F_HAVE_HA1) {
+ memcpy(md, context->SecretHash, sizeof(md));
+ } else if (context->flags & F_HAVE_HASH) {
+ memcpy(md, context->SecretHash, sizeof(md));
+ } else if (context->password) {
+ if (context->clientUsername == NULL)
+ return NULL;
+ if (context->serverRealm == NULL)
+ return NULL;
+ digest_userhash(context->clientUsername,
+ context->serverRealm,
+ context->password,
+ md);
+ } else
+ return NULL;
+
+ if ((context->type == HEIM_DIGEST_TYPE_RFC2617_MD5_SESS || context->type == HEIM_DIGEST_TYPE_RFC2831) && (context->flags & F_HAVE_HA1) == 0) {
+ if (context->serverNonce == NULL)
+ return NULL;
+
+ CC_MD5_Init(&ctx);
+ CC_MD5_Update(&ctx, md, sizeof(md));
+ memset(md, 0, sizeof(md));
+ CC_MD5_Update(&ctx, ":", 1);
+ CC_MD5_Update(&ctx, context->serverNonce, (CC_LONG)strlen(context->serverNonce));
+ if (context->clientNonce) {
+ CC_MD5_Update(&ctx, ":", 1);
+ CC_MD5_Update(&ctx, context->clientNonce, (CC_LONG)strlen(context->clientNonce));
+ }
+ if (context->type == HEIM_DIGEST_TYPE_RFC2831 && context->auth_id) {
+ CC_MD5_Update(&ctx, ":", 1);
+ CC_MD5_Update(&ctx, context->auth_id, (CC_LONG)strlen(context->auth_id));
+ }
+ CC_MD5_Final(md, &ctx);
+ }
+ hex_encode(md, sizeof(md), &A1);
+ if (A1)
+ strlwr(A1);
+
+ return A1;
+}
+
+static char *
+build_A2_hash(heim_digest_t context, const char *method)
+{
+ unsigned char md[CC_MD5_DIGEST_LENGTH];
+ CC_MD5_CTX ctx;
+ char *A2;
+
+ CC_MD5_Init(&ctx);
+ if (method)
+ CC_MD5_Update(&ctx, method, (CC_LONG)strlen(method));
+ CC_MD5_Update(&ctx, ":", 1);
+ CC_MD5_Update(&ctx, context->clientURI, (CC_LONG)strlen(context->clientURI));
+
+ /* conf|int */
+ if (context->type == HEIM_DIGEST_TYPE_RFC2831) {
+ if (strcasecmp(context->clientQOP, "auth-int") == 0 || strcasecmp(context->clientQOP, "auth-conf") == 0) {
+ /* XXX if we have a body hash, use that */
+ static char conf_zeros[] = ":00000000000000000000000000000000";
+ CC_MD5_Update(&ctx, conf_zeros, sizeof(conf_zeros) - 1);
+ }
+ } else {
+ /* support auth-int ? */
+ if (context->clientQOP && strcasecmp(context->clientQOP, "auth") != 0)
+ return NULL;
+ }
+
+ CC_MD5_Final(md, &ctx);
+
+ hex_encode(md, sizeof(md), &A2);
+ if (A2)
+ strlwr(A2);
+
+ return A2;
+}
+
+/*
+ *
+ */
+
+struct md5_value {
+ char *mv_name;
+ char *mv_value;
+ struct md5_value *mv_next;
+};
+
+static void
+free_values(struct md5_value *val)
+{
+ struct md5_value *v;
+ while(val) {
+ v = val->mv_next;
+ if (val->mv_name)
+ free(val->mv_name);
+ if (val->mv_value)
+ free(val->mv_value);
+ free(val);
+ val = v;
+ }
+}
+
+/*
+ * Search for entry, if found, remove entry and return string to be freed.
+ */
+
+static char *
+values_find(struct md5_value **val, const char *v)
+{
+ struct md5_value *cur;
+ char *str;
+
+ while (*val != NULL) {
+ if (strcasecmp(v, (*val)->mv_name) == 0)
+ break;
+ val = &(*val)->mv_next;
+ }
+ if (*val == NULL)
+ return NULL;
+ cur = *val;
+ *val = (*val)->mv_next;
+
+ str = cur->mv_value;
+ free(cur->mv_name);
+ free(cur);
+
+ return str;
+}
+
+static int
+parse_values(const char *string, struct md5_value **val)
+{
+ struct md5_value *v;
+ size_t size;
+ char *str, *p1, *p2;
+ size_t sz;
+
+ *val = NULL;
+
+ if ((str = strdup(string)) == NULL)
+ return ENOMEM;
+
+ size = strlen(str);
+
+ p1 = str;
+
+ while (p1 - str < size) {
+ sz = strspn(p1, " \t\n\r,");
+ if (p1[sz] == '\0')
+ break;
+ p1 += sz;
+ sz = strcspn(p1, " \t\n\r=");
+ if (sz == 0 || p1[sz] == '\0')
+ goto error;
+ p2 = p1 + sz;
+
+ if ((v = malloc(sizeof(*v))) == NULL)
+ goto nomem;
+ v->mv_name = v->mv_value = NULL;
+ v->mv_next = *val;
+ *val = v;
+ if ((v->mv_name = malloc(p2 - p1 + 1)) == NULL)
+ goto nomem;
+ strncpy(v->mv_name, p1, p2 - p1);
+ v->mv_name[p2 - p1] = '\0';
+
+ sz = strspn(p2, " \t\n\r");
+ if (p2[sz] == '\0')
+ goto error;
+ p2 += sz;
+
+ if (*p2 != '=')
+ goto error;
+ p2++;
+
+ sz = strspn(p2, " \t\n\r");
+ if (p2[sz] == '\0')
+ goto error;
+ p2 += sz;
+ p1 = p2;
+
+ if (*p2 == '"') {
+ p1++;
+ while (*p2 == '"') {
+ p2++;
+ p2 = strchr(p2, '\"');
+ if (p2 == NULL)
+ goto error;
+ if (p2[0] == '\0')
+ goto error;
+ if (p2[-1] != '\\')
+ break;
+ }
+ } else {
+ sz = strcspn(p2, " \t\n\r=,");
+ p2 += sz;
+ }
+
+#if 0 /* allow empty values */
+ if (p1 == p2)
+ goto error;
+#endif
+
+ if ((v->mv_value = malloc(p2 - p1 + 1)) == NULL)
+ goto nomem;
+ strncpy(v->mv_value, p1, p2 - p1);
+ v->mv_value[p2 - p1] = '\0';
+
+ if (p2[0] == '\0')
+ break;
+ if (p2[0] == '"')
+ p2++;
+
+ sz = strspn(p2, " \t\n\r");
+ if (p2[sz] == '\0')
+ break;
+ p2 += sz;
+
+ if (p2[0] == '\0')
+ break;
+ if (p2[0] != ',')
+ goto error;
+ p1 = p2;
+ }
+
+ free(str);
+
+ return 0;
+ error:
+ free_values(*val);
+ *val = NULL;
+ free(str);
+ return EINVAL;
+ nomem:
+ free_values(*val);
+ *val = NULL;
+ free(str);
+ return ENOMEM;
+}
+
+/*
+ *
+ */
+
+static const char *
+check_prefix(heim_digest_t context, const char *challenge)
+{
+ if (strncasecmp(digest_prefix, challenge, sizeof(digest_prefix) - 1) == 0) {
+
+ challenge += sizeof(digest_prefix) - 1;
+ while (*challenge == 0x20) /* remove extra space */
+ challenge++;
+ context->flags |= F_USE_PREFIX;
+ }
+
+ return challenge;
+}
+
+/*
+ *
+ */
+
+heim_digest_t
+heim_digest_create(int server, int type)
+{
+ heim_digest_t context;
+
+ context = calloc(1, sizeof(*context));
+ if (context == NULL)
+ return NULL;
+ context->flags |= F_SERVER;
+ context->type = type;
+
+ return context;
+}
+
+static char *
+generate_nonce(void)
+{
+ uint8_t rand[8];
+ char *nonce;
+
+ if (CCRandomCopyBytes(kCCRandomDefault, rand, sizeof(rand)) != kCCSuccess)
+ return NULL;
+
+ if (rk_hex_encode(rand, sizeof(rand), &nonce) < 0)
+ return NULL;
+
+ return nonce;
+}
+
+/**
+ * Generate a challange, needs to set serverRealm before calling this function.
+ *
+ * If type is set to HEIM_DIGEST_TYPE_AUTO, the HEIM_DIGEST_TYPE_RFC2831 will be used instead.
+ *
+ * For RFC2617 and RFC2831 QOP is required, so if any qop other then "auth" is requested, it need to be set with heim_diest_set_key().
+ *
+ * @return returns the challenge or NULL on error or failure to build the string. the lifetime
+ * of the string is manage by heim_digest and last until the the context is
+ * freed or until next call to heim_digest_generate_challenge().
+ */
+
+const char *
+heim_digest_generate_challenge(heim_digest_t context)
+{
+ char *challenge = NULL;
+
+ if (context->serverRealm == NULL)
+ return NULL;
+
+ if (context->serverNonce == NULL) {
+ if ((context->serverNonce = generate_nonce()) == NULL)
+ return NULL;
+ }
+
+ if (context->serverQOP == NULL) {
+ if ((context->serverQOP = strdup("auth")) == NULL)
+ return NULL;
+ }
+
+ if (context->serverMaxbuf == NULL) {
+ if ((context->serverMaxbuf = strdup("65536")) == NULL)
+ return NULL;
+ }
+
+ switch(context->type) {
+ case HEIM_DIGEST_TYPE_RFC2617_MD5:
+ asprintf(&challenge, "realm=\"%s\",nonce=\"%s\",algorithm=md5,qop=\"%s\"",
+ context->serverRealm, context->serverNonce,
+ context->serverQOP);
+ break;
+ case HEIM_DIGEST_TYPE_RFC2617_MD5_SESS:
+ asprintf(&challenge, "realm=\"%s\",nonce=\"%s\",algorithm=md5-sess,qop=\"%s\"",
+ context->serverRealm, context->serverNonce, context->serverQOP);
+ break;
+ case HEIM_DIGEST_TYPE_RFC2069:
+ asprintf(&challenge, "realm=\"%s\",nonce=\"%s\"",
+ context->serverRealm, context->serverNonce);
+ break;
+ case HEIM_DIGEST_TYPE_AUTO:
+ context->type = HEIM_DIGEST_TYPE_RFC2831;
+ HEIM_FALLTHROUGH;
+ case HEIM_DIGEST_TYPE_RFC2831:
+ asprintf(&challenge, "realm=\"%s\",nonce=\"%s\",qop=\"%s\",algorithm=md5-sess,charset=utf-8,maxbuf=%s",
+ context->serverRealm, context->serverNonce, context->serverQOP, context->serverMaxbuf);
+ break;
+ }
+
+ FREE_AND_CLEAR(context->serverChallenge);
+ context->serverChallenge = challenge;
+
+ return challenge;
+}
+
+int
+heim_digest_parse_challenge(heim_digest_t context, const char *challenge)
+{
+ struct md5_value *val = NULL;
+ int ret, type;
+
+ challenge = check_prefix(context, challenge);
+
+ ret = parse_values(challenge, &val);
+ if (ret)
+ goto out;
+
+ ret = 1;
+
+ context->serverNonce = values_find(&val, "nonce");
+ if (context->serverNonce == NULL) goto out;
+
+ context->serverRealm = values_find(&val, "realm");
+ if (context->serverRealm == NULL) goto out;
+
+ /* check alg */
+
+ context->serverAlgorithm = values_find(&val, "algorithm");
+ if (context->serverAlgorithm == NULL || strcasecmp(context->serverAlgorithm, "md5") == 0) {
+ type = HEIM_DIGEST_TYPE_RFC2617_MD5;
+ } else if (strcasecmp(context->serverAlgorithm, "md5-sess") == 0) {
+ type = HEIM_DIGEST_TYPE_RFC2617_OR_RFC2831;
+ } else {
+ goto out;
+ }
+
+ context->serverQOP = values_find(&val, "qop");
+ if (context->serverQOP == NULL)
+ type = HEIM_DIGEST_TYPE_RFC2069;
+
+ context->serverOpaque = values_find(&val, "opaque");
+
+ if (context->type != HEIM_DIGEST_TYPE_AUTO && (context->type & type) == 0)
+ goto out;
+ else if (context->type == HEIM_DIGEST_TYPE_AUTO)
+ context->type = type;
+
+ ret = 0;
+ out:
+ free_values(val);
+ if (ret)
+ clear_context(context);
+ return ret;
+}
+
+
+static void
+set_auth_method(heim_digest_t context)
+{
+
+ if (context->serverMethod == NULL) {
+ if (context->type == HEIM_DIGEST_TYPE_RFC2831)
+ context->serverMethod = strdup("AUTHENTICATE");
+ else
+ context->serverMethod = strdup("GET");
+ }
+}
+
+int
+heim_digest_parse_response(heim_digest_t context, const char *response)
+{
+ struct md5_value *val = NULL;
+ char *nonce;
+ int ret;
+
+ response = check_prefix(context, response);
+
+ ret = parse_values(response, &val);
+ if (ret)
+ goto out;
+
+ ret = 1;
+
+ if (context->type == HEIM_DIGEST_TYPE_AUTO) {
+ goto out;
+ } else if (context->type == HEIM_DIGEST_TYPE_RFC2617_OR_RFC2831) {
+ context->clientURI = values_find(&val, "uri");
+ if (context->clientURI) {
+ context->type = HEIM_DIGEST_TYPE_RFC2617_MD5_SESS;
+ } else {
+ context->clientURI = values_find(&val, "digest-uri");
+ context->type = HEIM_DIGEST_TYPE_RFC2831;
+ }
+ } else if (context->type == HEIM_DIGEST_TYPE_RFC2831) {
+ context->clientURI = values_find(&val, "digest-uri");
+ } else {
+ context->clientURI = values_find(&val, "uri");
+ }
+
+ if (context->clientURI == NULL)
+ goto out;
+
+ context->clientUsername = values_find(&val, "username");
+ if (context->clientUsername == NULL) goto out;
+
+ /* if client sent realm, make sure its the same of serverRealm if its set */
+ context->clientRealm = values_find(&val, "realm");
+ if (context->clientRealm && context->serverRealm && strcmp(context->clientRealm, context->serverRealm) != 0)
+ goto out;
+
+ context->clientResponse = values_find(&val, "response");
+ if (context->clientResponse == NULL) goto out;
+
+ nonce = values_find(&val, "nonce");
+ if (nonce == NULL) goto out;
+
+ if (strcmp(nonce, context->serverNonce) != 0) {
+ free(nonce);
+ goto out;
+ }
+ free(nonce);
+
+ if (context->type != HEIM_DIGEST_TYPE_RFC2069) {
+
+ context->clientQOP = values_find(&val, "qop");
+ if (context->clientQOP == NULL) goto out;
+
+ /*
+ * If we have serverQOP, lets check that clientQOP exists
+ * in the list of server entries.
+ */
+
+ if (context->serverQOP) {
+ Boolean found = false;
+ char *b, *e;
+ size_t len, clen = strlen(context->clientQOP);
+
+ b = context->serverQOP;
+ while (b && !found) {
+ e = strchr(b, ',');
+ if (e == NULL)
+ len = strlen(b);
+ else {
+ len = e - b;
+ e += 1;
+ }
+ if (clen == len && strncmp(b, context->clientQOP, len) == 0)
+ found = true;
+ b = e;
+ }
+ if (!found)
+ goto out;
+ }
+
+ context->clientNC = values_find(&val, "nc");
+ if (context->clientNC == NULL) goto out;
+
+ context->clientNonce = values_find(&val, "cnonce");
+ if (context->clientNonce == NULL) goto out;
+ }
+
+ set_auth_method(context);
+
+ ret = 0;
+ out:
+ free_values(val);
+ return ret;
+}
+
+char *
+heim_digest_userhash(const char *user, const char *realm, const char *password)
+{
+ unsigned char md[CC_MD5_DIGEST_LENGTH];
+ char *str = NULL;
+
+ digest_userhash(user, realm, password, md);
+
+ hex_encode(md, sizeof(md), &str);
+ if (str)
+ strlwr(str);
+ return str;
+}
+
+static char *
+build_digest(heim_digest_t context, const char *a1, const char *method)
+{
+ CC_MD5_CTX ctx;
+ uint8_t md[CC_MD5_DIGEST_LENGTH];
+ char *a2, *str = NULL;
+
+ a2 = build_A2_hash(context, method);
+ if (a2 == NULL)
+ return NULL;
+
+ CC_MD5_Init(&ctx);
+ CC_MD5_Update(&ctx, a1, (CC_LONG)strlen(a1));
+ CC_MD5_Update(&ctx, ":", 1);
+ CC_MD5_Update(&ctx, context->serverNonce, (CC_LONG)strlen(context->serverNonce));
+ if (context->type != HEIM_DIGEST_TYPE_RFC2069) {
+ CC_MD5_Update(&ctx, ":", 1);
+ CC_MD5_Update(&ctx, context->clientNC, (CC_LONG)strlen(context->clientNC));
+ CC_MD5_Update(&ctx, ":", 1);
+ CC_MD5_Update(&ctx, context->clientNonce, (CC_LONG)strlen(context->clientNonce));
+ CC_MD5_Update(&ctx, ":", 1);
+ CC_MD5_Update(&ctx, context->clientQOP, (CC_LONG)strlen(context->clientQOP));
+ }
+ CC_MD5_Update(&ctx, ":", 1);
+ CC_MD5_Update(&ctx, a2, (CC_LONG)strlen(a2));
+ CC_MD5_Final(md, &ctx);
+
+ free(a2);
+
+ hex_encode(md, sizeof(md), &str);
+ if (str)
+ strlwr(str);
+
+ return str;
+}
+
+static void
+build_server_response(heim_digest_t context, char *a1, char **response)
+{
+ char *str;
+
+ str = build_digest(context, a1, NULL);
+ if (str == NULL)
+ return;
+
+ FREE_AND_CLEAR(context->serverReply);
+ asprintf(&context->serverReply, "%srspauth=%s",
+ (context->flags & F_USE_PREFIX) ? digest_prefix : "",
+ str);
+ free(str);
+ if (response)
+ *response = context->serverReply;
+}
+
+
+/**
+ * Create response from server to client to server, server verification is in response.
+ * clientUsername and clientURI have to be given.
+ * If realm is not set, its used from server.
+ */
+
+const char *
+heim_digest_create_response(heim_digest_t context, char **response)
+{
+ char *a1, *str, *cnonce = NULL, *opaque = NULL, *uri = NULL, *nc = NULL;
+
+ if (response)
+ *response = NULL;
+
+ if (context->clientUsername == NULL || context->clientURI == NULL)
+ return NULL;
+
+ if (context->clientRealm == NULL) {
+ if (context->serverRealm == NULL)
+ return NULL;
+ if ((context->clientRealm = strdup(context->serverRealm)) == NULL)
+ return NULL;
+ }
+
+ if (context->type != HEIM_DIGEST_TYPE_RFC2069) {
+ if (context->clientNC == NULL) {
+ if ((context->clientNC = strdup("00000001")) == NULL)
+ return NULL;
+ }
+ if (context->clientNonce == NULL) {
+ if ((context->clientNonce = generate_nonce()) == NULL)
+ return NULL;
+ }
+
+ /**
+ * If using non RFC2069, appropriate QOP should be set.
+ *
+ * Pick QOP from server if not given, if its a list, pick the first entry
+ */
+ if (context->clientQOP == NULL) {
+ char *r;
+ if (context->serverQOP == NULL)
+ return NULL;
+ r = strchr(context->serverQOP, ',');
+ if (r == NULL) {
+ if ((context->clientQOP = strdup(context->serverQOP)) == NULL)
+ return NULL;
+ } else {
+ size_t len = (r - context->serverQOP) + 1;
+ if ((context->clientQOP = malloc(len)) == NULL)
+ return NULL;
+ strlcpy(context->clientQOP, context->serverQOP, len);
+ }
+ }
+ }
+
+ set_auth_method(context);
+
+ a1 = build_A1_hash(context);
+ if (a1 == NULL)
+ return NULL;
+
+ str = build_digest(context, a1, context->serverMethod);
+ if (str == NULL) {
+ MEMSET_FREE_AND_CLEAR(a1);
+ return NULL;
+ }
+
+ MEMSET_FREE_AND_CLEAR(context->clientResponse);
+ context->clientResponse = str;
+
+ if (context->clientURI) {
+ const char *name = "digest-uri";
+ if (context->type != HEIM_DIGEST_TYPE_RFC2831)
+ name = "uri";
+ asprintf(&uri, ",%s=\"%s\"", name, context->clientURI);
+ }
+
+ if (context->serverOpaque)
+ asprintf(&opaque, ",opaque=\"%s\"", context->serverOpaque);
+
+ if (context->clientNonce)
+ asprintf(&cnonce, ",cnonce=\"%s\"", context->clientNonce);
+
+ if (context->clientNC)
+ asprintf(&nc, ",nc=%s", context->clientNC);
+
+ asprintf(&context->clientReply,
+ "username=%s,realm=%s,nonce=\"%s\",qop=\"%s\"%s%s%s,response=\"%s\"%s",
+ context->clientUsername, context->clientRealm,
+ context->serverNonce,
+ context->clientQOP,
+ uri ? uri : "",
+ cnonce ? cnonce : "",
+ nc ? nc : "",
+ context->clientResponse,
+ opaque ? opaque : "");
+
+ build_server_response(context, a1, response);
+ MEMSET_FREE_AND_CLEAR(a1);
+ FREE_AND_CLEAR(uri);
+ FREE_AND_CLEAR(opaque);
+ FREE_AND_CLEAR(cnonce);
+ FREE_AND_CLEAR(nc);
+
+ return context->clientReply;
+}
+
+int
+heim_digest_verify(heim_digest_t context, char **response)
+{
+ char *a1;
+ char *str;
+ int res;
+
+ if (response)
+ *response = NULL;
+
+ set_auth_method(context);
+
+ a1 = build_A1_hash(context);
+ if (a1 == NULL)
+ return ENOMEM;
+
+ str = build_digest(context, a1, context->serverMethod);
+ if (str == NULL) {
+ MEMSET_FREE_AND_CLEAR(a1);
+ return ENOMEM;
+ }
+
+ res = (strcmp(str, context->clientResponse) == 0) ? 0 : EINVAL;
+ free(str);
+ if (res) {
+ MEMSET_FREE_AND_CLEAR(a1);
+ return res;
+ }
+
+ /* build server_response */
+ build_server_response(context, a1, response);
+ MEMSET_FREE_AND_CLEAR(a1);
+ /* XXX break ABI and return internally allocated string instead */
+ if (response)
+ *response = strdup(*response);
+
+ return 0;
+}
+
+/**
+ * Create a rspauth= response.
+ * Assumes that the A1hash/password serverNonce, clientNC, clientNonce, clientQOP is set.
+ *
+ * @return the rspauth string (including rspauth), return key are stored in serverReply and will be invalid after another call to heim_digest_*
+ */
+
+const char *
+heim_digest_server_response(heim_digest_t context)
+{
+ char *a1;
+
+ if (context->serverNonce == NULL)
+ return NULL;
+ if (context->clientURI == NULL)
+ return NULL;
+
+ a1 = build_A1_hash(context);
+ if (a1 == NULL)
+ return NULL;
+
+ build_server_response(context, a1, NULL);
+ MEMSET_FREE_AND_CLEAR(a1);
+
+ return context->serverReply;
+}
+
+void
+heim_digest_get_session_key(heim_digest_t context, void **key, size_t *keySize)
+{
+}
+
+void
+heim_digest_release(heim_digest_t context)
+{
+ clear_context(context);
+ free(context);
+}
+
+struct {
+ char *name;
+ size_t offset;
+} keys[] = {
+#define KVN(value) { #value, offsetof(struct heim_digest_desc, value) }
+ KVN(serverNonce),
+ KVN(serverRealm),
+ KVN(serverQOP),
+ KVN(serverMethod),
+ { "method", offsetof(struct heim_digest_desc, serverMethod) },
+ KVN(serverMaxbuf),
+ KVN(clientUsername),
+ { "username", offsetof(struct heim_digest_desc, clientUsername) },
+ KVN(clientResponse),
+ KVN(clientURI),
+ { "uri", offsetof(struct heim_digest_desc, clientURI) },
+ KVN(clientRealm),
+ { "realm", offsetof(struct heim_digest_desc, clientRealm) },
+ KVN(clientNonce),
+ KVN(clientQOP),
+ KVN(clientNC),
+ KVN(serverAlgorithm),
+ KVN(auth_id)
+#undef KVN
+};
+
+const char *
+heim_digest_get_key(heim_digest_t context, const char *key)
+{
+ size_t n;
+
+ for (n = 0; n < sizeof(keys) / sizeof(keys[0]); n++) {
+ if (strcasecmp(key, keys[n].name) == 0) {
+ char **ptr = (char **)((((char *)context) + keys[n].offset));
+ return *ptr;
+ }
+ }
+ return NULL;
+}
+
+int
+heim_digest_set_key(heim_digest_t context, const char *key, const char *value)
+{
+
+ if (strcmp(key, "password") == 0) {
+ FREE_AND_CLEAR(context->password);
+ if ((context->password = strdup(value)) == NULL)
+ return ENOMEM;
+ context->flags &= ~(F_HAVE_HASH|F_HAVE_HA1);
+ } else if (strcmp(key, "userhash") == 0) {
+ ssize_t ret;
+ FREE_AND_CLEAR(context->password);
+
+ ret = hex_decode(value, context->SecretHash, sizeof(context->SecretHash));
+ if (ret != sizeof(context->SecretHash))
+ return EINVAL;
+ context->flags &= ~F_HAVE_HA1;
+ context->flags |= F_HAVE_HASH;
+ } else if (strcmp(key, "H(A1)") == 0) {
+ ssize_t ret;
+ FREE_AND_CLEAR(context->password);
+
+ ret = hex_decode(value, context->SecretHash, sizeof(context->SecretHash));
+ if (ret != sizeof(context->SecretHash))
+ return EINVAL;
+ context->flags &= ~F_HAVE_HASH;
+ context->flags |= F_HAVE_HA1;
+ } else if (strcmp(key, "method") == 0) {
+ FREE_AND_CLEAR(context->serverMethod);
+ if ((context->serverMethod = strdup(value)) == NULL)
+ return ENOMEM;
+ } else {
+ size_t n;
+
+ for (n = 0; n < sizeof(keys) / sizeof(keys[0]); n++) {
+ if (strcasecmp(key, keys[n].name) == 0) {
+ char **ptr = (char **)((((char *)context) + keys[n].offset));
+ FREE_AND_CLEAR(*ptr);
+ if (((*ptr) = strdup(value)) == NULL)
+ return ENOMEM;
+ break;
+ }
+ }
+ if (n == sizeof(keys) / sizeof(keys[0]))
+ return ENOENT;
+ }
+ return 0;
+}
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-20 22:11:50 +0000