GNU libmicrohttpd
0.9.5
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Implements HTTP digest authentication. More...
Go to the source code of this file.
Macros | |
#define | HASH_MD5_HEX_LEN (2 * MD5_DIGEST_SIZE) |
#define | _BASE "Digest " |
#define | MAX_USERNAME_LENGTH 128 |
#define | MAX_REALM_LENGTH 256 |
#define | MAX_AUTH_RESPONSE_LENGTH 128 |
Functions | |
static void | cvthex (const unsigned char *bin, size_t len, char *hex) |
static void | digest_calc_ha1 (const char *alg, const char *username, const char *realm, const char *password, const char *nonce, const char *cnonce, char *sessionkey) |
static void | digest_calc_response (const char *ha1, const char *nonce, const char *noncecount, const char *cnonce, const char *qop, const char *method, const char *uri, const char *hentity, char *response) |
static int | lookup_sub_value (char *dest, size_t size, const char *data, const char *key) |
static int | check_nonce_nc (struct MHD_Connection *connection, const char *nonce, unsigned long int nc) |
char * | MHD_digest_auth_get_username (struct MHD_Connection *connection) |
static void | calculate_nonce (uint32_t nonce_time, const char *method, const char *rnd, unsigned int rnd_size, const char *uri, const char *realm, char *nonce) |
static int | test_header (struct MHD_Connection *connection, const char *key, const char *value) |
static int | check_argument_match (struct MHD_Connection *connection, const char *args) |
int | MHD_digest_auth_check (struct MHD_Connection *connection, const char *realm, const char *username, const char *password, unsigned int nonce_timeout) |
int | MHD_queue_auth_fail_response (struct MHD_Connection *connection, const char *realm, const char *opaque, struct MHD_Response *response, int signal_stale) |
Implements HTTP digest authentication.
Definition in file digestauth.c.
#define _BASE "Digest " |
Beginning string for any valid Digest authentication header.
Definition at line 35 of file digestauth.c.
Referenced by MHD_digest_auth_check(), and MHD_digest_auth_get_username().
#define HASH_MD5_HEX_LEN (2 * MD5_DIGEST_SIZE) |
Definition at line 30 of file digestauth.c.
Referenced by digest_calc_response(), MHD_digest_auth_check(), and MHD_queue_auth_fail_response().
#define MAX_AUTH_RESPONSE_LENGTH 128 |
Maximum length of the response in digest authentication.
Definition at line 50 of file digestauth.c.
Referenced by MHD_digest_auth_check().
#define MAX_REALM_LENGTH 256 |
Maximum length of a realm for digest authentication.
Definition at line 45 of file digestauth.c.
Referenced by MHD_digest_auth_check().
#define MAX_USERNAME_LENGTH 128 |
Maximum length of a username for digest authentication.
Definition at line 40 of file digestauth.c.
Referenced by MHD_digest_auth_check(), and MHD_digest_auth_get_username().
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Calculate the server nonce so that it mitigates replay attacks The current format of the nonce is ... H(timestamp ":" method ":" random ":" uri ":" realm) + Hex(timestamp)
nonce_time | The amount of time in seconds for a nonce to be invalid |
method | HTTP method |
rnd | A pointer to a character array for the random seed |
rnd_size | The size of the random seed array |
uri | HTTP URI (in MHD, without the arguments ("?k=v") |
realm | A string of characters that describes the realm of auth. |
nonce | A pointer to a character array for the nonce to put in |
Definition at line 389 of file digestauth.c.
References cvthex(), MD5_DIGEST_SIZE, MD5Final(), MD5Init(), and MD5Update().
Referenced by MHD_digest_auth_check(), and MHD_queue_auth_fail_response().
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Check that the arguments given by the client as part of the authentication header match the arguments we got as part of the HTTP request URI.
connection | connections with headers to compare against |
args | argument URI string (after "?" in URI) |
Definition at line 471 of file digestauth.c.
References MHD_Connection::daemon, MHD_Connection::headers_received, MHD_HTTP_Header::kind, MHD_GET_ARGUMENT_KIND, MHD_NO, MHD_YES, MHD_HTTP_Header::next, NULL, test_header(), MHD_Daemon::unescape_callback, and MHD_Daemon::unescape_callback_cls.
Referenced by MHD_digest_auth_check().
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Check nonce-nc map array with either new nonce counter or a whole new nonce.
connection | The MHD connection structure |
nonce | A pointer that referenced a zero-terminated array of nonce |
nc | The nonce counter, zero to add the nonce to the array |
Definition at line 294 of file digestauth.c.
References MHD_Connection::daemon, MHD_NO, and MHD_YES.
Referenced by MHD_digest_auth_check(), and MHD_queue_auth_fail_response().
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convert bin to hex
bin | binary data |
len | number of bytes in bin |
hex | pointer to len*2+1 bytes |
Definition at line 61 of file digestauth.c.
Referenced by calculate_nonce(), digest_calc_ha1(), and digest_calc_response().
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calculate H(A1) as per RFC2617 spec and store the result in 'sessionkey'.
alg | The hash algorithm used, can be "md5" or "md5-sess" |
username | A `char *' pointer to the username value |
realm | A `char *' pointer to the realm value |
password | A `char *' pointer to the password value |
nonce | A `char *' pointer to the nonce value |
cnonce | A `char *' pointer to the cnonce value |
sessionkey | pointer to buffer of HASH_MD5_HEX_LEN+1 bytes |
Definition at line 92 of file digestauth.c.
References cvthex(), MD5_DIGEST_SIZE, MD5Final(), MD5Init(), and MD5Update().
Referenced by MHD_digest_auth_check().
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Calculate request-digest/response-digest as per RFC2617 spec
ha1 | H(A1) |
nonce | nonce from server |
noncecount | 8 hex digits |
cnonce | client nonce |
qop | qop-value: "", "auth" or "auth-int" |
method | method from request |
uri | requested URL |
hentity | H(entity body) if qop="auth-int" |
response | request-digest or response-digest |
Definition at line 138 of file digestauth.c.
References cvthex(), HASH_MD5_HEX_LEN, MD5_DIGEST_SIZE, MD5Final(), MD5Init(), MD5Update(), and NULL.
Referenced by MHD_digest_auth_check().
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Lookup subvalue off of the HTTP Authorization header.
A description of the input format for 'data' is at http://en.wikipedia.org/wiki/Digest_access_authentication
dest | where to store the result (possibly truncated if the buffer is not big enough). |
size | size of dest |
data | pointer to the Authorization header |
key | key to look up in data |
Definition at line 205 of file digestauth.c.
References NULL.
Referenced by MHD_digest_auth_check(), and MHD_digest_auth_get_username().
int MHD_digest_auth_check | ( | struct MHD_Connection * | connection, |
const char * | realm, | ||
const char * | username, | ||
const char * | password, | ||
unsigned int | nonce_timeout | ||
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Authenticates the authorization header sent by the client
connection | The MHD connection structure |
realm | The realm presented to the client |
username | The username needs to be authenticated |
password | The password used in the authentication |
nonce_timeout | The amount of time for a nonce to be invalid in seconds |
Definition at line 546 of file digestauth.c.
References _BASE, calculate_nonce(), check_argument_match(), check_nonce_nc(), MHD_Connection::daemon, digest_calc_ha1(), digest_calc_response(), HASH_MD5_HEX_LEN, MHD_HTTP_Header::header, lookup_sub_value(), MAX_AUTH_RESPONSE_LENGTH, MAX_NONCE_LENGTH, MAX_REALM_LENGTH, MAX_USERNAME_LENGTH, MHD_Connection::method, MHD_HEADER_KIND, MHD_HTTP_HEADER_AUTHORIZATION, MHD_INVALID_NONCE, MHD_lookup_connection_value(), MHD_monotonic_time(), MHD_NO, MHD_YES, NULL, and MHD_Connection::url.
char* MHD_digest_auth_get_username | ( | struct MHD_Connection * | connection | ) |
Get the username from the authorization header sent by the client
connection | The MHD connection structure |
Definition at line 353 of file digestauth.c.
References _BASE, lookup_sub_value(), MAX_USERNAME_LENGTH, MHD_HEADER_KIND, MHD_HTTP_HEADER_AUTHORIZATION, MHD_lookup_connection_value(), and NULL.
int MHD_queue_auth_fail_response | ( | struct MHD_Connection * | connection, |
const char * | realm, | ||
const char * | opaque, | ||
struct MHD_Response * | response, | ||
int | signal_stale | ||
) |
Queues a response to request authentication from the client
connection | The MHD connection structure |
realm | the realm presented to the client |
opaque | string to user for opaque value |
signal_stale | MHD_YES if the nonce is invalid to add 'stale=true' to the authentication header |
Definition at line 744 of file digestauth.c.
References calculate_nonce(), check_nonce_nc(), MHD_Connection::daemon, HASH_MD5_HEX_LEN, MHD_HTTP_Header::header, MHD_Connection::method, MHD_add_response_header(), MHD_HTTP_HEADER_WWW_AUTHENTICATE, MHD_HTTP_UNAUTHORIZED, MHD_monotonic_time(), MHD_NO, MHD_queue_response(), MHD_YES, NULL, and MHD_Connection::url.
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Test if the given key-value pair is in the headers for the given connection.
connection | the connection |
key | the key |
value | the value, can be NULL |
Definition at line 435 of file digestauth.c.
References MHD_HTTP_Header::header, MHD_Connection::headers_received, MHD_HTTP_Header::kind, MHD_GET_ARGUMENT_KIND, MHD_NO, MHD_YES, MHD_HTTP_Header::next, NULL, and MHD_HTTP_Header::value.
Referenced by check_argument_match().