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@@ -0,0 +1,148 @@
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+/*
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+ * Digest Authentication Module
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+ * Digest response calculation as per RFC2617
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+ *
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+ * Copyright (C) 2001-2003 FhG Fokus
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+ *
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+ * This file is part of Kamailio, a free SIP server.
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+ *
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+ * Kamailio is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License as published by
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+ * the Free Software Foundation; either version 2 of the License, or
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+ * (at your option) any later version
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+ *
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+ * Kamailio is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program; if not, write to the Free Software
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+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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+ *
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+ */
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+
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+
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+#include <sys/types.h>
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+#include <stdlib.h>
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+#include <string.h>
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+
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+#include "rfc2617_sha256.h"
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+#include "../../lib/srutils/sha256.h"
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+#include "../../dprint.h"
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+
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+
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+inline void cvt_hex_sha256(HASH_SHA256 _b, HASHHEX_SHA256 _h)
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+{
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+ unsigned short i;
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+ unsigned char j;
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+
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+ for (i = 0; i < HASHLEN_SHA256; i++) {
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+ j = (_b[i] >> 4) & 0xf;
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+ if (j <= 9) {
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+ _h[i * 2] = (j + '0');
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+ } else {
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+ _h[i * 2] = (j + 'a' - 10);
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+ }
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+
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+ j = _b[i] & 0xf;
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+
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+ if (j <= 9) {
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+ _h[i * 2 + 1] = (j + '0');
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+ } else {
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+ _h[i * 2 + 1] = (j + 'a' - 10);
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+ }
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+ };
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+
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+ _h[HASHHEXLEN_SHA256] = '\0';
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+}
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+
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+/* Cast to unsigned values and forward to sr_SHA256_Update */
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+static inline void SHA256_Update(SHA256_CTX* context, char *data, int len)
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+{
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+ sr_SHA256_Update(context, (unsigned char*)data, (unsigned int)len);
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+}
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+
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+/*
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+ * calculate H(A1) as per spec
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+ */
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+void calc_HA1_sha256(ha_alg_t _alg, str* _username, str* _realm, str* _password,
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+ str* _nonce, str* _cnonce, HASHHEX_SHA256 _sess_key)
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+{
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+ SHA256_CTX Sha256Ctx;
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+ HASH_SHA256 HA1;
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+
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+ sr_SHA256_Init(&Sha256Ctx);
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+ SHA256_Update(&Sha256Ctx, _username->s, _username->len);
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+ SHA256_Update(&Sha256Ctx, ":", 1);
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+ SHA256_Update(&Sha256Ctx, _realm->s, _realm->len);
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+ SHA256_Update(&Sha256Ctx, ":", 1);
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+ SHA256_Update(&Sha256Ctx, _password->s, _password->len);
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+ sr_SHA256_Final(HA1, &Sha256Ctx);
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+
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+ if (_alg == HA_MD5_SESS) {
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+ sr_SHA256_Init(&Sha256Ctx);
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+ sr_SHA256_Update(&Sha256Ctx, HA1, HASHLEN_SHA256);
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+ SHA256_Update(&Sha256Ctx, ":", 1);
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+ SHA256_Update(&Sha256Ctx, _nonce->s, _nonce->len);
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+ SHA256_Update(&Sha256Ctx, ":", 1);
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+ SHA256_Update(&Sha256Ctx, _cnonce->s, _cnonce->len);
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+ sr_SHA256_Final(HA1, &Sha256Ctx);
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+ };
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+
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+ cvt_hex_sha256(HA1, _sess_key);
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+}
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+
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+
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+/*
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+ * calculate request-digest/response-digest as per HTTP Digest spec
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+ */
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+void calc_response_sha256(HASHHEX_SHA256 _ha1, /* H(A1) */
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+ str* _nonce, /* nonce from server */
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+ str* _nc, /* 8 hex digits */
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+ str* _cnonce, /* client nonce */
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+ str* _qop, /* qop-value: "", "auth", "auth-int" */
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+ int _auth_int, /* 1 if auth-int is used */
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+ str* _method, /* method from the request */
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+ str* _uri, /* requested URL */
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+ HASHHEX_SHA256 _hentity, /* H(entity body) if qop="auth-int" */
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+ HASHHEX_SHA256 _response) /* request-digest or response-digest */
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+{
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+ SHA256_CTX Sha256Ctx;
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+ HASH_SHA256 HA2;
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+ HASH_SHA256 RespHash;
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+ HASHHEX_SHA256 HA2Hex;
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+
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+ /* calculate H(A2) */
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+ sr_SHA256_Init(&Sha256Ctx);
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+ SHA256_Update(&Sha256Ctx, _method->s, _method->len);
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+ SHA256_Update(&Sha256Ctx, ":", 1);
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+ SHA256_Update(&Sha256Ctx, _uri->s, _uri->len);
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+
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+ if (_auth_int) {
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+ SHA256_Update(&Sha256Ctx, ":", 1);
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+ SHA256_Update(&Sha256Ctx, _hentity, HASHHEXLEN_SHA256);
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+ };
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+
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+ sr_SHA256_Final(HA2, &Sha256Ctx);
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+ cvt_hex_sha256(HA2, HA2Hex);
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+
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+ /* calculate response */
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+ sr_SHA256_Init(&Sha256Ctx);
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+ SHA256_Update(&Sha256Ctx, _ha1, HASHHEXLEN_SHA256);
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+ SHA256_Update(&Sha256Ctx, ":", 1);
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+ SHA256_Update(&Sha256Ctx, _nonce->s, _nonce->len);
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+ SHA256_Update(&Sha256Ctx, ":", 1);
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+
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+ if (_qop->len) {
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+ SHA256_Update(&Sha256Ctx, _nc->s, _nc->len);
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+ SHA256_Update(&Sha256Ctx, ":", 1);
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+ SHA256_Update(&Sha256Ctx, _cnonce->s, _cnonce->len);
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+ SHA256_Update(&Sha256Ctx, ":", 1);
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+ SHA256_Update(&Sha256Ctx, _qop->s, _qop->len);
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+ SHA256_Update(&Sha256Ctx, ":", 1);
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+ };
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+ SHA256_Update(&Sha256Ctx, HA2Hex, HASHHEXLEN_SHA256);
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+ sr_SHA256_Final(RespHash, &Sha256Ctx);
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+ cvt_hex_sha256(RespHash, _response);
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+}
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AndreasHuber-CH