/*
silcauth.h
-
+
Author: Pekka Riikonen <priikone@silcnet.org>
-
- Copyright (C) 2001 Pekka Riikonen
-
+
+ Copyright (C) 2001 - 2008 Pekka Riikonen
+
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
+ the Free Software Foundation; version 2 of the License.
+
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* DESCRIPTION
*
* Implementations of the SILC Authentication Payload and authentication
- * routines. The SILC Authentication Payload is used to deliver
- * authentication data usually from client to server in purpose of
+ * routines. The SILC Authentication Payload is used to deliver
+ * authentication data usually from client to server in purpose of
* gaining access to some service. The Payload and the authentication
* routines supports both passphrase and public key (signature) based
* authentication.
#ifndef SILCAUTH_H
#define SILCAUTH_H
-/****s* silccore/SilcAuthAPI/SilcAuthPayload
- *
- * NAME
- *
- * typedef struct SilcAuthPayloadStruct *SilcAuthPayload;
- *
- *
- * DESCRIPTION
- *
- * This context is the actual Authentication Payload and is allocated
- * by silc_auth_payload_parse and given as argument usually to all
- * silc_auth_payload_* functions. It is freed by silc_auth_payload_free
- * function.
- *
- ***/
-typedef struct SilcAuthPayloadStruct *SilcAuthPayload;
-
-/****s* silccore/SilcAuthAPI/SilcKeyAgreementPayload
- *
- * NAME
- *
- * typedef struct SilcKeyAgreementPayloadStruct *SilcKeyAgreementPayload;
- *
- * DESCRIPTION
- *
- * This context is the actual Key Agreement Payload and is allocated
- * by silc_key_agreement_payload_parse and given as argument usually to all
- * silc_key_agreement_* functions. It is freed by the function
- * silc_key_agreement_payload_free.
- *
- ***/
-typedef struct SilcKeyAgreementPayloadStruct *SilcKeyAgreementPayload;
+#define SILC_DEFAULT_HMAC "hmac-sha1-96"
+#define SILC_DEFAULT_HASH "sha1"
+#define SILC_DEFAULT_PKCS "rsa"
+#define SILC_DEFAULT_CIPHER "aes-256-cbc"
/****d* silccore/SilcAuthAPI/SilcAuthMethod
*
* NAME
- *
+ *
* typedef SilcUInt16 SilcAuthMethod;
*
* DESCRIPTION
#define SILC_AUTH_PASSWORD 1 /* Passphrase authentication */
#define SILC_AUTH_PUBLIC_KEY 2 /* Public key authentication */
-/* Authentication protocol status message (used by all authentication
- protocols in the SILC). */
-#define SILC_AUTH_OK 0
-#define SILC_AUTH_FAILED 1
+/****d* silccore/SilcAuthAPI/SilcAuthResult
+ *
+ * NAME
+ *
+ * typedef SilcUInt32 SilcAuthResult;
+ *
+ * DESCRIPTION
+ *
+ * Authentication protocol status. Used by all authentication protocols
+ * in SILC.
+ *
+ * SOURCE
+ */
+typedef SilcUInt32 SilcAuthResult;
+
+#define SILC_AUTH_OK 0 /* Authentication successful */
+#define SILC_AUTH_FAILED 1 /* Authentication failed */
/***/
-/* Prototypes */
+/****s* silccore/SilcAuthAPI/SilcAuthPayload
+ *
+ * NAME
+ *
+ * typedef struct SilcAuthPayloadStruct *SilcAuthPayload;
+ *
+ *
+ * DESCRIPTION
+ *
+ * This context is the actual Authentication Payload and is allocated
+ * by silc_auth_payload_parse and given as argument usually to all
+ * silc_auth_payload_* functions. It is freed by silc_auth_payload_free
+ * function.
+ *
+ ***/
+typedef struct SilcAuthPayloadStruct *SilcAuthPayload;
/****f* silccore/SilcAuthAPI/silc_auth_payload_parse
*
* SYNOPSIS
*
- * SilcAuthPayload silc_auth_payload_parse(const unsigned char *data,
+ * SilcAuthPayload silc_auth_payload_parse(SilcStack stack,
+ * const unsigned char *data,
* SilcUInt32 data_len);
*
* DESCRIPTION
*
* Parses and returns Authentication Payload. The `data' and the
- * `data_len' are the raw payload buffer.
+ * `data_len' are the raw payload buffer. If `stack' is non-NULL the
+ * memory is allcoated from `stack'.
*
***/
-SilcAuthPayload silc_auth_payload_parse(const unsigned char *data,
+SilcAuthPayload silc_auth_payload_parse(SilcStack stack,
+ const unsigned char *data,
SilcUInt32 data_len);
/****f* silccore/SilcAuthAPI/silc_auth_payload_encode
*
* SYNOPSIS
*
- * SilcBuffer silc_auth_payload_encode(SilcAuthMethod method,
+ * SilcBuffer silc_auth_payload_encode(SilcStack stack,
+ * SilcAuthMethod method,
* const unsigned char *random_data,
* SilcUInt16 random_len,
* const unsigned char *auth_data,
*
* Encodes authentication payload into buffer and returns it.
* The `random_data' is provided only if doing public key authentication.
- * The `auth_data' is the actual authentication data.
+ * The `auth_data' is the actual authentication data. If the
+ * `method' is SILC_AUTH_PASSWORD the passphase in `auth_data' sent as
+ * argument SHOULD be UTF-8 encoded, if not library will attempt to
+ * encode it.
+ *
+ * If `stack' is non-NULL the returned buffer is allocated from `stack'.
+ * This call consumes the `stack' so caller should push the stack before
+ * calling this function and then later pop it.
*
***/
-SilcBuffer silc_auth_payload_encode(SilcAuthMethod method,
+SilcBuffer silc_auth_payload_encode(SilcStack stack,
+ SilcAuthMethod method,
const unsigned char *random_data,
SilcUInt16 random_len,
const unsigned char *auth_data,
***/
SilcAuthMethod silc_auth_get_method(SilcAuthPayload payload);
+/****f* silccore/SilcAuthAPI/silc_auth_get_public_data
+ *
+ * SYNOPSIS
+ *
+ * unsigned char *silc_auth_get_public_data(SilcAuthPayload payload,
+ * SilcUInt32 *pubdata_len);
+ *
+ * DESCRIPTION
+ *
+ * Returns the public data (usually random data) from the payload.
+ * Caller must not free the returned data.
+ *
+ ***/
+unsigned char *silc_auth_get_public_data(SilcAuthPayload payload,
+ SilcUInt32 *pubdata_len);
+
/****f* silccore/SilcAuthAPI/silc_auth_get_data
*
* SYNOPSIS
*
* DESCRIPTION
*
- * Get the authentication data. The caller must not free the data.
+ * Get the authentication data. The caller must not free the data. If
+ * the authentication method is passphrase, then the returned string
+ * is UTF-8 encoded passphrase.
*
***/
unsigned char *silc_auth_get_data(SilcAuthPayload payload,
SilcUInt32 *auth_len);
+/****f* silccore/SilcAuthAPI/SilcAuthGenerated
+ *
+ * SYNOPSIS
+ *
+ * typedef void (*SilcAuthGenerated)(const SilcBuffer data, void *context);
+ *
+ * DESCRIPTION
+ *
+ * Callback of this type is given as argument to
+ * silc_auth_public_key_auth_generate and
+ * silc_auth_public_key_auth_generate_wpub to deliver the generated
+ * Authentication Payload. If `data' is NULL the generating failed.
+ *
+ ***/
+typedef void (*SilcAuthGenerated)(const SilcBuffer data, void *context);
+
/****f* silccore/SilcAuthAPI/silc_auth_public_key_auth_generate
*
* SYNOPSIS
*
- * SilcBuffer silc_auth_public_key_auth_generate(SilcPublicKey public_key,
- * SilcPrivateKey private_key,
- * SilcRng rng,
- * SilcHash hash,
- * const void *id,
- * SilcIdType type);
+ * SilcAsyncOperation
+ * silc_auth_public_key_auth_generate(SilcPublicKey public_key,
+ * SilcPrivateKey private_key,
+ * SilcRng rng,
+ * SilcHash hash,
+ * const void *id,
+ * SilcIdType type,
+ * SilcAuthGenerated generated,
+ * void *context);
*
* DESCRIPTION
*
* Generates Authentication Payload with authentication data. This is used
* to do public key based authentication. This generates the random data
- * and the actual authentication data. Returns NULL on error and the
- * encoded Authentication Payload on success.
+ * and the actual authentication data.
*
* The `private_key' is used to sign the payload. The `public_key', the
* and the `id' is encoded in the payload and signed. If the `rng' is
* random number generator. Also random number is encoded in the
* payload before signing it with `private_key'.
*
+ * The `generated' is called to deliver the generated Authentication
+ * Payload.
+ *
+ ***/
+SilcAsyncOperation
+silc_auth_public_key_auth_generate(SilcPublicKey public_key,
+ SilcPrivateKey private_key,
+ SilcRng rng, SilcHash hash,
+ const void *id, SilcIdType type,
+ SilcAuthGenerated generated,
+ void *context);
+
+/****f* silccore/SilcAuthAPI/silc_auth_public_key_auth_generate_wpub
+ *
+ * SYNOPSIS
+ *
+ * SilcAsyncOperation
+ * silc_auth_public_key_auth_generate_wpub(SilcPublicKey public_key,
+ * SilcPrivateKey private_key,
+ * const unsigned char *pubdata,
+ * SilcUInt32 pubdata_len,
+ * SilcHash hash,
+ * SilcRng rng,
+ * const void *id,
+ * SilcIdType type,
+ * SilcAuthGenerated generated,
+ * void *context);
+ *
+ * DESCRIPTION
+ *
+ * Same as silc_auth_public_key_auth_generate but takes the public data
+ * (usually random data) as argument. This function can be used when
+ * the public data must be something else than purely random or its
+ * structure mut be set before signing.
+ *
+ * The `generated' is called to deliver the generated Authentication
+ * Payload.
+ *
+ ***/
+SilcAsyncOperation
+silc_auth_public_key_auth_generate_wpub(SilcPublicKey public_key,
+ SilcPrivateKey private_key,
+ const unsigned char *pubdata,
+ SilcUInt32 pubdata_len,
+ SilcHash hash,
+ SilcRng rng,
+ const void *id, SilcIdType type,
+ SilcAuthGenerated generated,
+ void *context);
+
+/****f* silccore/SilcAuthAPI/SilcAuthResult
+ *
+ * SYNOPSIS
+ *
+ * typedef void (*SilcAuthResult)(SilcBool success, void *context);
+ *
+ * DESCRIPTION
+ *
+ * Callback of this type is given as argument to silc_auth_verify,
+ * silc_auth_verify_data, silc_auth_public_key_auth_verify and
+ * silc_auth_public_key_auth_verify_data to deliver the result of
+ * the authentication verification. If `success' is FALSE the
+ * authentication failed.
+ *
***/
-SilcBuffer silc_auth_public_key_auth_generate(SilcPublicKey public_key,
- SilcPrivateKey private_key,
- SilcRng rng, SilcHash hash,
- const void *id, SilcIdType type);
+typedef void (*SilcAuthResultCb)(SilcBool success, void *context);
/****f* silccore/SilcAuthAPI/silc_auth_public_key_auth_verify
*
* SYNOPSIS
*
- * bool silc_auth_public_key_auth_verify(SilcAuthPayload payload,
- * SilcPublicKey public_key,
- * SilcHash hash,
- * const void *id, SilcIdType type);
+ * SilcAsyncOperation
+ * silc_auth_public_key_auth_verify(SilcAuthPayload payload,
+ * SilcPublicKey public_key,
+ * SilcHash hash,
+ * const void *id,
+ * SilcIdType type,
+ * SilcAuthResult result,
+ * void *context);
*
* DESCRIPTION
*
- * Verifies the authentication data. Returns TRUE if authentication was
- * successful.
+ * Verifies the authentication data. Calls the `result' to deliver
+ * the result of the verification.
*
***/
-bool silc_auth_public_key_auth_verify(SilcAuthPayload payload,
- SilcPublicKey public_key, SilcHash hash,
- const void *id, SilcIdType type);
+SilcAsyncOperation
+silc_auth_public_key_auth_verify(SilcAuthPayload payload,
+ SilcPublicKey public_key,
+ SilcHash hash,
+ const void *id,
+ SilcIdType type,
+ SilcAuthResultCb result,
+ void *context);
/****f* silccore/SilcAuthAPI/silc_auth_public_key_auth_verify_data
*
* SYNOPSIS
*
- * bool silc_auth_public_key_auth_verify_data(const unsigned char *payload,
- * SilcUInt32 payload_len,
- * SilcPublicKey public_key,
- * SilcHash hash,
- * const void *id,
- * SilcIdType type);
+ * SilcAsyncOperation
+ * silc_auth_public_key_auth_verify_data(const unsigned char *payload,
+ * SilcUInt32 payload_len,
+ * SilcPublicKey public_key,
+ * SilcHash hash,
+ * const void *id,
+ * SilcIdType type,
+ * SilcAuthResult result,
+ * void *context);
*
* DESCRIPTION
*
* Same as silc_auth_public_key_auth_verify but the payload has not
- * been parsed yet. This will parse it. Returns TRUE if authentication
- * was successful.
+ * been parsed yet. This will parse it. Calls the `result' to deliver
+ * the result of the verification.
*
***/
-bool silc_auth_public_key_auth_verify_data(const unsigned char *payload,
- SilcUInt32 payload_len,
- SilcPublicKey public_key,
- SilcHash hash,
- const void *id, SilcIdType type);
+SilcAsyncOperation
+silc_auth_public_key_auth_verify_data(const unsigned char *payload,
+ SilcUInt32 payload_len,
+ SilcPublicKey public_key,
+ SilcHash hash,
+ const void *id,
+ SilcIdType type,
+ SilcAuthResultCb result,
+ void *context);
/****f* silccore/SilcAuthAPI/silc_auth_verify
*
* SYNOPSIS
*
- * bool silc_auth_verify(SilcAuthPayload payload,
- * SilcAuthMethod auth_method,
- * const void *auth_data, SilcUInt32 auth_data_len,
- * SilcHash hash, const void *id, SilcIdType type);
+ * SilcAsyncOperation
+ * silc_auth_verify(SilcAuthPayload payload,
+ * SilcAuthMethod auth_method,
+ * const void *auth_data,
+ * SilcUInt32 auth_data_len,
+ * SilcHash hash,
+ * const void *id, SilcIdType type,
+ * SilcAuthResult result, void *context);
*
* DESCRIPTION
*
- * Verifies the authentication data directly from the Authentication
+ * Verifies the authentication data directly from the Authentication
* Payload. Supports all authentication methods. If the authentication
* method is passphrase based then the `auth_data' and `auth_data_len'
- * are the passphrase and its length. If the method is public key
- * authentication then the `auth_data' is the SilcPublicKey and the
- * `auth_data_len' is ignored.
+ * are the passphrase and its length. The passphrase MUST be UTF-8
+ * encoded. If the method is public key authentication then the
+ * `auth_data' is the SilcPublicKey and the `auth_data_len' is ignored.
+ * Calls the `result' to deliver the result of the verification.
*
***/
-bool silc_auth_verify(SilcAuthPayload payload, SilcAuthMethod auth_method,
- const void *auth_data, SilcUInt32 auth_data_len,
- SilcHash hash, const void *id, SilcIdType type);
+SilcAsyncOperation
+silc_auth_verify(SilcAuthPayload payload, SilcAuthMethod auth_method,
+ const void *auth_data, SilcUInt32 auth_data_len,
+ SilcHash hash, const void *id, SilcIdType type,
+ SilcAuthResultCb result, void *context);
/****f* silccore/SilcAuthAPI/silc_auth_verify_data
*
* SYNOPSIS
*
- * bool silc_auth_verify_data(const unsigned char *payload,
- * SilcUInt32 payload_len,
- * SilcAuthMethod auth_method,
- * const void *auth_data,
- * SilcUInt32 auth_data_len, SilcHash hash,
- * const void *id, SilcIdType type);
- *
+ * SilcAsyncOperation
+ * silc_auth_verify_data(const unsigned char *payload,
+ * SilcUInt32 payload_len,
+ * SilcAuthMethod auth_method,
+ * const void *auth_data,
+ * SilcUInt32 auth_data_len, SilcHash hash,
+ * const void *id, SilcIdType type,
+ * SilcAuthResult result, void *context);
+ *
* DESCRIPTION
*
* Same as silc_auth_verify but the payload has not been parsed yet.
- * Verifies the authentication data directly from the Authentication
+ * Verifies the authentication data directly from the Authentication
* Payload. Supports all authentication methods. If the authentication
* method is passphrase based then the `auth_data' and `auth_data_len'
- * are the passphrase and its length. If the method is public key
- * authentication then the `auth_data' is the SilcPublicKey and the
- * `auth_data_len' is ignored.
+ * are the passphrase and its length. The passphrase MUST be UTF-8
+ * encoded. If the method is public key authentication then the
+ * `auth_data' is the SilcPublicKey and the `auth_data_len' is ignored.
+ * Calls the `result' to deliver the result of the verification.
+ *
+ ***/
+SilcAsyncOperation
+silc_auth_verify_data(const unsigned char *payload,
+ SilcUInt32 payload_len,
+ SilcAuthMethod auth_method,
+ const void *auth_data,
+ SilcUInt32 auth_data_len, SilcHash hash,
+ const void *id, SilcIdType type,
+ SilcAuthResultCb result, void *context);
+
+/****s* silccore/SilcAuthAPI/SilcKeyAgreementPayload
+ *
+ * NAME
+ *
+ * typedef struct SilcKeyAgreementPayloadStruct *SilcKeyAgreementPayload;
+ *
+ * DESCRIPTION
+ *
+ * This context is the actual Key Agreement Payload and is allocated
+ * by silc_key_agreement_payload_parse and given as argument usually to all
+ * silc_key_agreement_* functions. It is freed by the function
+ * silc_key_agreement_payload_free.
*
***/
-bool silc_auth_verify_data(const unsigned char *payload, SilcUInt32 payload_len,
- SilcAuthMethod auth_method, const void *auth_data,
- SilcUInt32 auth_data_len, SilcHash hash,
- const void *id, SilcIdType type);
+typedef struct SilcKeyAgreementPayloadStruct *SilcKeyAgreementPayload;
/****f* silccore/SilcAuthAPI/silc_key_agreement_payload_parse
*
* SYNOPSIS
*
- * SilcKeyAgreementPayload
+ * SilcKeyAgreementPayload
* silc_key_agreement_payload_parse(const unsigned char *payload,
* SilcUInt32 payload_len);
*
* Parses and returns an allocated Key Agreement payload.
*
***/
-SilcKeyAgreementPayload
+SilcKeyAgreementPayload
silc_key_agreement_payload_parse(const unsigned char *payload,
SilcUInt32 payload_len);
* SYNOPSIS
*
* SilcBuffer silc_key_agreement_payload_encode(char *hostname,
- * SilcUInt32 port);
+ * SilcUInt16 protocol,
+ * SilcUInt16 port);
*
* DESCRIPTION
*
- * Encodes the Key Agreement protocol and returns the encoded buffer
+ * Encodes the Key Agreement payload and returns the encoded buffer.
+ * The `protocol' is 0 for TCP and 1 for UDP.
*
***/
SilcBuffer silc_key_agreement_payload_encode(const char *hostname,
- SilcUInt32 port);
+ SilcUInt16 protocol,
+ SilcUInt16 port);
/****f* silccore/SilcAuthAPI/silc_key_agreement_payload_free
*
*
* DESCRIPTION
*
- * Frees the Key Agreement protocol and all data in it.
+ * Frees the Key Agreement payload and all data in it.
*
***/
void silc_key_agreement_payload_free(SilcKeyAgreementPayload payload);
***/
char *silc_key_agreement_get_hostname(SilcKeyAgreementPayload payload);
+/****f* silccore/SilcAuthAPI/silc_key_agreement_get_protocol
+ *
+ * SYNOPSIS
+ *
+ * SilcUInt16
+ * silc_key_agreement_get_protocol(SilcKeyAgreementPayload payload);
+ *
+ * DESCRIPTION
+ *
+ * Returns the protocol in the payload. The protocol is either TCP (0)
+ * or UDP (1).
+ *
+ ***/
+SilcUInt16 silc_key_agreement_get_protocol(SilcKeyAgreementPayload payload);
+
/****f* silccore/SilcAuthAPI/silc_key_agreement_get_port
*
* SYNOPSIS
*
- * SilcUInt32 silc_key_agreement_get_port(SilcKeyAgreementPayload payload);
+ * SilcUInt16 silc_key_agreement_get_port(SilcKeyAgreementPayload payload);
*
* DESCRIPTION
*
* the SILC Key Exchange protocol.
*
***/
-SilcUInt32 silc_key_agreement_get_port(SilcKeyAgreementPayload payload);
+SilcUInt16 silc_key_agreement_get_port(SilcKeyAgreementPayload payload);
#endif
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