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Code Issues Releases Wiki Activity

sasl_gssapi: Fixed use of dummy username with real username

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This commit is contained in:
Steve Holme 2014-12-28 19:19:14 +00:00
parent 037cd0d991
commit 6e7904f9aa
1 changed files with 41 additions and 5 deletions
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46
lib/curl_sasl_gssapi.c
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@ -127,7 +127,6 @@ CURLcode Curl_sasl_create_gssapi_user_message(struct SessionHandle *data,
/* Import the SPN */
gss_major_status = gss_import_name(&gss_minor_status, &spn_token,
gss_nt_service_name, &krb5->spn);
if(GSS_ERROR(gss_major_status)) {
Curl_gss_log_error(data, gss_minor_status, "gss_import_name() failed: ");
@ -226,7 +225,8 @@ CURLcode Curl_sasl_create_gssapi_security_message(struct SessionHandle *data,
gss_qop_t qop = GSS_C_QOP_DEFAULT;
unsigned int sec_layer = 0;
unsigned int max_size = 0;
char user_name[] = "dummy.user"; /* FIX: Use real user name */
gss_name_t username = GSS_C_NO_NAME;
gss_buffer_desc username_token;
/* Decode the base-64 encoded input message */
if(strlen(chlg64) && *chlg64 != '=') {
@ -242,6 +242,30 @@ CURLcode Curl_sasl_create_gssapi_security_message(struct SessionHandle *data,
return CURLE_BAD_CONTENT_ENCODING;
}
/* Get the fully qualified username back from the context */
gss_major_status = gss_inquire_context(&gss_minor_status, krb5->context,
&username, NULL, NULL, NULL, NULL,
NULL, NULL);
if(GSS_ERROR(gss_major_status)) {
Curl_gss_log_error(data, gss_minor_status,
"gss_inquire_context() failed: ");
Curl_safefree(chlg);
return CURLE_OUT_OF_MEMORY;
}
/* Convert the username from internal format to a displayable token */
gss_major_status = gss_display_name(&gss_minor_status, username,
&username_token, NULL);
if(GSS_ERROR(gss_major_status)) {
Curl_gss_log_error(data, gss_minor_status, "gss_display_name() failed: ");
Curl_safefree(chlg);
return CURLE_OUT_OF_MEMORY;
}
/* Setup the challenge "input" security buffer */
input_token.value = chlg;
input_token.length = chlglen;
@ -252,6 +276,7 @@ CURLcode Curl_sasl_create_gssapi_security_message(struct SessionHandle *data,
if(GSS_ERROR(gss_major_status)) {
Curl_gss_log_error(data, gss_minor_status, "gss_unwrap() failed: ");
gss_release_buffer(&gss_status, &username_token);
Curl_safefree(chlg);
return CURLE_BAD_CONTENT_ENCODING;
@ -261,6 +286,7 @@ CURLcode Curl_sasl_create_gssapi_security_message(struct SessionHandle *data,
if(output_token.length != 4) {
infof(data, "GSSAPI handshake failure (invalid security data)\n");
gss_release_buffer(&gss_status, &username_token);
Curl_safefree(chlg);
return CURLE_BAD_CONTENT_ENCODING;
@ -276,6 +302,8 @@ CURLcode Curl_sasl_create_gssapi_security_message(struct SessionHandle *data,
if(!(sec_layer & GSSAUTH_P_NONE)) {
infof(data, "GSSAPI handshake failure (invalid security layer)\n");
gss_release_buffer(&gss_status, &username_token);
return CURLE_BAD_CONTENT_ENCODING;
}
@ -289,10 +317,13 @@ CURLcode Curl_sasl_create_gssapi_security_message(struct SessionHandle *data,
}
/* Allocate our message */
messagelen = sizeof(outdata) + strlen(user_name) + 1;
messagelen = sizeof(outdata) + username_token.length + 1;
message = malloc(messagelen);
if(!message)
if(!message) {
gss_release_buffer(&gss_status, &username_token);
return CURLE_OUT_OF_MEMORY;
}
/* Populate the message with the security layer, client supported receive
message size and authorization identity including the 0x00 based
@ -301,7 +332,12 @@ CURLcode Curl_sasl_create_gssapi_security_message(struct SessionHandle *data,
necessary to include it. */
outdata = htonl(max_size) | sec_layer;
memcpy(message, &outdata, sizeof(outdata));
strcpy((char *) message + sizeof(outdata), user_name);
memcpy(message + sizeof(outdata), username_token.value,
username_token.length);
message[messagelen - 1] = '\0';
/* Free the username token as it is not required anymore */
gss_release_buffer(&gss_status, &username_token);
/* Setup the "authentication data" security buffer */
input_token.value = message;