X-Git-Url: http://git.silcnet.org/gitweb/?a=blobdiff_plain;f=lib%2Fsilccore%2Fsilcauth.h;h=29101966d7ce6208f7b79055477b6ca1a66cd64d;hb=413da0f8686910f5e627393157566ae729ca99c4;hp=3181a0ebeb175d6c0b5b947af97ecc9a2a4e89f9;hpb=579f5c6c93c452155943b6526f4c64f6deb27982;p=silc.git diff --git a/lib/silccore/silcauth.h b/lib/silccore/silcauth.h index 3181a0eb..29101966 100644 --- a/lib/silccore/silcauth.h +++ b/lib/silccore/silcauth.h @@ -1,16 +1,15 @@ /* - siclauth.h + silcauth.h - Author: Pekka Riikonen + Author: Pekka Riikonen - Copyright (C) 2001 Pekka Riikonen + Copyright (C) 2001 - 2003 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 @@ -18,63 +17,412 @@ */ +/****h* silccore/SILC Authentication Interface + * + * 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 + * gaining access to some service. The Payload and the authentication + * routines supports both passphrase and public key (signature) based + * authentication. + * + * This interface defines also the SILC Key Agreement Payload that is + * used by client to agree on key material usually with another client + * in the network. + * + ***/ + #ifndef SILCAUTH_H #define SILCAUTH_H -/* Forward declaration of the Authentication Payload */ -typedef struct SilcAuthPayloadStruct *SilcAuthPayload; +/****d* silccore/SilcAuthAPI/SilcAuthMethod + * + * NAME + * + * typedef SilcUInt16 SilcAuthMethod; + * + * DESCRIPTION + * + * Authentication method type definition, the authentication methods + * and the authentication status'. The status defines are used by + * all authentication protocols in the SILC. + * + * SOURCE + */ +typedef SilcUInt16 SilcAuthMethod; -/* Forward declaration of the Key Agreement Payload */ -typedef struct SilcKeyAgreementPayloadStruct *SilcKeyAgreementPayload; - -/* Authentication method type */ -typedef unsigned short SilcAuthMethod; - -/* Authentication methods in SILC protocol */ -#define SILC_AUTH_NONE 0 -#define SILC_AUTH_PASSWORD 1 -#define SILC_AUTH_PUBLIC_KEY 2 +#define SILC_AUTH_NONE 0 /* No authentication */ +#define SILC_AUTH_PASSWORD 1 /* Passphrase authentication */ +#define SILC_AUTH_PUBLIC_KEY 2 /* Public key authentication */ /* Authentication protocol status message (used by all authentication - procols in the SILC). */ + protocols in the SILC). */ #define SILC_AUTH_OK 0 #define SILC_AUTH_FAILED 1 +/***/ -/* Prototypes */ -SilcAuthPayload silc_auth_payload_parse(unsigned char *data, - unsigned int data_len); +/****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, + * SilcUInt32 data_len); + * + * DESCRIPTION + * + * Parses and returns Authentication Payload. The `data' and the + * `data_len' are the raw payload buffer. + * + ***/ +SilcAuthPayload silc_auth_payload_parse(const unsigned char *data, + SilcUInt32 data_len); + +/****f* silccore/SilcAuthAPI/silc_auth_payload_encode + * + * SYNOPSIS + * + * SilcBuffer silc_auth_payload_encode(SilcAuthMethod method, + * const unsigned char *random_data, + * SilcUInt16 random_len, + * const unsigned char *auth_data, + * SilcUInt16 auth_len); + * + * DESCRIPTION + * + * 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. 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. + * + ***/ SilcBuffer silc_auth_payload_encode(SilcAuthMethod method, - unsigned char *random_data, - unsigned short random_len, - unsigned char *auth_data, - unsigned short auth_len); + const unsigned char *random_data, + SilcUInt16 random_len, + const unsigned char *auth_data, + SilcUInt16 auth_len); + +/****f* silccore/SilcAuthAPI/silc_auth_payload_free + * + * SYNOPSIS + * + * void silc_auth_payload_free(SilcAuthPayload payload); + * + * DESCRIPTION + * + * Frees authentication payload and all data in it. + * + ***/ void silc_auth_payload_free(SilcAuthPayload payload); + +/****f* silccore/SilcAuthAPI/silc_auth_get_method + * + * SYNOPSIS + * + * SilcAuthMethod silc_auth_get_method(SilcAuthPayload payload); + * + * DESCRIPTION + * + * Get authentication method. + * + ***/ 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 + * + * unsigned char *silc_auth_get_data(SilcAuthPayload payload, + * SilcUInt32 *auth_len); + * + * DESCRIPTION + * + * 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, - unsigned int *auth_len); + SilcUInt32 *auth_len); + +/****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); + * + * 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. + * + * 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 + * NULL then global RNG is used, if non-NULL then `rng' is used as + * random number generator. Also random number is encoded in the + * payload before signing it with `private_key'. + * + ***/ SilcBuffer silc_auth_public_key_auth_generate(SilcPublicKey public_key, SilcPrivateKey private_key, - SilcHash hash, - void *id, SilcIdType type); -int silc_auth_public_key_auth_verify(SilcAuthPayload payload, - SilcPublicKey public_key, SilcHash hash, - void *id, SilcIdType type); -int silc_auth_public_key_auth_verify_data(SilcBuffer payload, - SilcPublicKey public_key, - SilcHash hash, - void *id, SilcIdType type); -int silc_auth_verify(SilcAuthPayload payload, SilcAuthMethod auth_method, - void *auth_data, unsigned int auth_data_len, - SilcHash hash, void *id, SilcIdType type); -int silc_auth_verify_data(unsigned char *payload, unsigned int payload_len, - SilcAuthMethod auth_method, void *auth_data, - unsigned int auth_data_len, SilcHash hash, - void *id, SilcIdType type); -SilcKeyAgreementPayload silc_key_agreement_payload_parse(SilcBuffer buffer); -SilcBuffer silc_key_agreement_payload_encode(char *hostname, - unsigned int port); + SilcRng rng, SilcHash hash, + const void *id, SilcIdType type); + +/****f* silccore/SilcAuthAPI/silc_auth_public_key_auth_generate_wpub + * + * SYNOPSIS + * + * SilcBuffer + * silc_auth_public_key_auth_generate_wpub(SilcPublicKey public_key, + * SilcPrivateKey private_key, + * const unsigned char *pubdata, + * SilcUInt32 pubdata_len, + * SilcHash hash, + * const void *id, + * SilcIdType type); + * + * 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. + * + ***/ +SilcBuffer +silc_auth_public_key_auth_generate_wpub(SilcPublicKey public_key, + SilcPrivateKey private_key, + const unsigned char *pubdata, + SilcUInt32 pubdata_len, + SilcHash hash, + const void *id, SilcIdType type); + +/****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); + * + * DESCRIPTION + * + * Verifies the authentication data. Returns TRUE if authentication was + * successful. + * + ***/ +bool silc_auth_public_key_auth_verify(SilcAuthPayload payload, + SilcPublicKey public_key, SilcHash hash, + const void *id, SilcIdType type); + +/****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); + * + * 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. + * + ***/ +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); + +/****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); + * + * DESCRIPTION + * + * 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. 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. + * + ***/ +bool silc_auth_verify(SilcAuthPayload payload, SilcAuthMethod auth_method, + const void *auth_data, SilcUInt32 auth_data_len, + SilcHash hash, const void *id, SilcIdType type); + +/****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); + * + * DESCRIPTION + * + * Same as silc_auth_verify but the payload has not been parsed yet. + * 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. 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. + * + ***/ +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); + +/****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; + +/****f* silccore/SilcAuthAPI/silc_key_agreement_payload_parse + * + * SYNOPSIS + * + * SilcKeyAgreementPayload + * silc_key_agreement_payload_parse(const unsigned char *payload, + * SilcUInt32 payload_len); + * + * DESCRIPTION + * + * Parses and returns an allocated Key Agreement payload. + * + ***/ +SilcKeyAgreementPayload +silc_key_agreement_payload_parse(const unsigned char *payload, + SilcUInt32 payload_len); + +/****f* silccore/SilcAuthAPI/silc_key_agreement_payload_encode + * + * SYNOPSIS + * + * SilcBuffer silc_key_agreement_payload_encode(char *hostname, + * SilcUInt32 port); + * + * DESCRIPTION + * + * Encodes the Key Agreement protocol and returns the encoded buffer + * + ***/ +SilcBuffer silc_key_agreement_payload_encode(const char *hostname, + SilcUInt32 port); + +/****f* silccore/SilcAuthAPI/silc_key_agreement_payload_free + * + * SYNOPSIS + * + * void silc_key_agreement_payload_free(SilcKeyAgreementPayload payload); + * + * DESCRIPTION + * + * Frees the Key Agreement protocol and all data in it. + * + ***/ void silc_key_agreement_payload_free(SilcKeyAgreementPayload payload); + +/****f* silccore/SilcAuthAPI/silc_key_agreement_get_hostname + * + * SYNOPSIS + * + * char *silc_key_agreement_get_hostname(SilcKeyAgreementPayload payload); + * + * DESCRIPTION + * + * Returns the hostname in the payload. Caller must not free it. + * The hostname is the host that is able to accept key negotiation + * using the SILC Key Exchange protocol. + * + ***/ char *silc_key_agreement_get_hostname(SilcKeyAgreementPayload payload); -unsigned int silc_key_agreement_get_port(SilcKeyAgreementPayload payload); + +/****f* silccore/SilcAuthAPI/silc_key_agreement_get_port + * + * SYNOPSIS + * + * SilcUInt32 silc_key_agreement_get_port(SilcKeyAgreementPayload payload); + * + * DESCRIPTION + * + * Returns the port in the payload. The port is the port on the + * host returned by silc_key_agreement_get_hostname that is running + * the SILC Key Exchange protocol. + * + ***/ +SilcUInt32 silc_key_agreement_get_port(SilcKeyAgreementPayload payload); #endif