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[http] Abstract out HTTP Digest hash algorithm operations 

Signed-off-by: Michael Brown <mcb30@ipxe.org>
pull/34/head
Michael Brown 2015-03-09 12:35:17 +00:00
parent 3eb91209d9
commit 42ea20afee
1 changed files with 56 additions and 28 deletions
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84
src/net/tcp/httpcore.c
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@ -1076,6 +1076,44 @@ static char * http_basic_auth ( struct http_request *http ) {
return auth; return auth;
} }
/**
* Initialise HTTP digest
*
* @v ctx Digest context
* @v string Initial string
*/
static void http_digest_init ( struct md5_context *ctx ) {
digest_init ( &md5_algorithm, ctx );
}
/**
* Update HTTP digest with new data
*
* @v ctx Digest context
* @v string String to append
*/
static void http_digest_update ( struct md5_context *ctx, const char *string ) {
static const char colon = ':';
if ( ctx->len )
digest_update ( &md5_algorithm, ctx, &colon, sizeof ( colon ) );
digest_update ( &md5_algorithm, ctx, string, strlen ( string ) );
}
/**
* Finalise HTTP digest
*
* @v ctx Digest context
* @v out Buffer for digest output
*/
static void http_digest_final ( struct md5_context *ctx, char *out ) {
uint8_t digest[MD5_DIGEST_SIZE];
digest_final ( &md5_algorithm, ctx, digest );
base16_encode ( digest, sizeof ( digest ), out );
}
/** /**
* Generate HTTP Digest authorisation string * Generate HTTP Digest authorisation string
* *
@ -1095,12 +1133,10 @@ static char * http_digest_auth ( struct http_request *http,
const char *realm = http->auth_realm; const char *realm = http->auth_realm;
const char *nonce = http->auth_nonce; const char *nonce = http->auth_nonce;
const char *opaque = http->auth_opaque; const char *opaque = http->auth_opaque;
static const char colon = ':'; struct md5_context ctx;
uint8_t ctx[MD5_CTX_SIZE]; char ha1[ base16_encoded_len ( MD5_DIGEST_SIZE ) + 1 /* NUL */ ];
uint8_t digest[MD5_DIGEST_SIZE]; char ha2[ base16_encoded_len ( MD5_DIGEST_SIZE ) + 1 /* NUL */ ];
char ha1[ base16_encoded_len ( sizeof ( digest ) ) + 1 /* NUL */ ]; char response[ base16_encoded_len ( MD5_DIGEST_SIZE ) + 1 /* NUL */ ];
char ha2[ base16_encoded_len ( sizeof ( digest ) ) + 1 /* NUL */ ];
char response[ base16_encoded_len ( sizeof ( digest ) ) + 1 /* NUL */ ];
char *auth; char *auth;
int len; int len;
@ -1110,32 +1146,24 @@ static char * http_digest_auth ( struct http_request *http,
assert ( nonce != NULL ); assert ( nonce != NULL );
/* Generate HA1 */ /* Generate HA1 */
digest_init ( &md5_algorithm, ctx ); http_digest_init ( &ctx );
digest_update ( &md5_algorithm, ctx, user, strlen ( user ) ); http_digest_update ( &ctx, user );
digest_update ( &md5_algorithm, ctx, &colon, sizeof ( colon ) ); http_digest_update ( &ctx, realm );
digest_update ( &md5_algorithm, ctx, realm, strlen ( realm ) ); http_digest_update ( &ctx, password );
digest_update ( &md5_algorithm, ctx, &colon, sizeof ( colon ) ); http_digest_final ( &ctx, ha1 );
digest_update ( &md5_algorithm, ctx, password, strlen ( password ) );
digest_final ( &md5_algorithm, ctx, digest );
base16_encode ( digest, sizeof ( digest ), ha1 );
/* Generate HA2 */ /* Generate HA2 */
digest_init ( &md5_algorithm, ctx ); http_digest_init ( &ctx );
digest_update ( &md5_algorithm, ctx, method, strlen ( method ) ); http_digest_update ( &ctx, method );
digest_update ( &md5_algorithm, ctx, &colon, sizeof ( colon ) ); http_digest_update ( &ctx, uri );
digest_update ( &md5_algorithm, ctx, uri, strlen ( uri ) ); http_digest_final ( &ctx, ha2 );
digest_final ( &md5_algorithm, ctx, digest );
base16_encode ( digest, sizeof ( digest ), ha2 );
/* Generate response */ /* Generate response */
digest_init ( &md5_algorithm, ctx ); http_digest_init ( &ctx );
digest_update ( &md5_algorithm, ctx, ha1, strlen ( ha1 ) ); http_digest_update ( &ctx, ha1 );
digest_update ( &md5_algorithm, ctx, &colon, sizeof ( colon ) ); http_digest_update ( &ctx, nonce );
digest_update ( &md5_algorithm, ctx, nonce, strlen ( nonce ) ); http_digest_update ( &ctx, ha2 );
digest_update ( &md5_algorithm, ctx, &colon, sizeof ( colon ) ); http_digest_final ( &ctx, response );
digest_update ( &md5_algorithm, ctx, ha2, strlen ( ha2 ) );
digest_final ( &md5_algorithm, ctx, digest );
base16_encode ( digest, sizeof ( digest ), response );
/* Generate the authorisation string */ /* Generate the authorisation string */
len = asprintf ( &auth, "Authorization: Digest username=\"%s\", " len = asprintf ( &auth, "Authorization: Digest username=\"%s\", "