| /** |
| * \file pk.h |
| * |
| * \brief Public Key abstraction layer |
| * |
| * Copyright (C) 2006-2013, Brainspark B.V. |
| * |
| * This file is part of PolarSSL (http://www.polarssl.org) |
| * Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org> |
| * |
| * All rights reserved. |
| * |
| * 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. |
| * |
| * 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 |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write to the Free Software Foundation, Inc., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| */ |
| |
| #ifndef POLARSSL_PK_H |
| #define POLARSSL_PK_H |
| |
| #include "config.h" |
| |
| #include "md.h" |
| |
| #if defined(POLARSSL_RSA_C) |
| #include "rsa.h" |
| #endif |
| |
| #if defined(POLARSSL_ECP_C) |
| #include "ecp.h" |
| #endif |
| |
| #if defined(POLARSSL_ECDSA_C) |
| #include "ecdsa.h" |
| #endif |
| |
| #define POLARSSL_ERR_PK_MALLOC_FAILED -0x2F80 /**< Memory alloation failed. */ |
| #define POLARSSL_ERR_PK_TYPE_MISMATCH -0x2F00 /**< Type mismatch, eg attempt to encrypt with an ECDSA key */ |
| #define POLARSSL_ERR_PK_BAD_INPUT_DATA -0x2E80 /**< Bad input parameters to function. */ |
| |
| #if defined(POLARSSL_RSA_C) |
| /** |
| * Quick access to an RSA context inside a PK context. |
| * |
| * \warning You must make sure the PK context actually holds an RSA context |
| * before using this macro! |
| */ |
| #define pk_rsa( pk ) ( (rsa_context *) (pk).pk_ctx ) |
| #endif /* POLARSSL_RSA_C */ |
| |
| #if defined(POLARSSL_ECP_C) |
| /** |
| * Quick access to an EC context inside a PK context. |
| * |
| * \warning You must make sure the PK context actually holds an EC context |
| * before using this macro! |
| */ |
| #define pk_ec( pk ) ( (ecp_keypair *) (pk).pk_ctx ) |
| #endif /* POLARSSL_ECP_C */ |
| |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /** |
| * \brief Public key types |
| */ |
| typedef enum { |
| POLARSSL_PK_NONE=0, |
| POLARSSL_PK_RSA, |
| POLARSSL_PK_ECKEY, |
| POLARSSL_PK_ECKEY_DH, |
| POLARSSL_PK_ECDSA, |
| POLARSSL_PK_RSA_ALT, |
| } pk_type_t; |
| |
| /** |
| * \brief Types for interfacing with the debug module |
| */ |
| typedef enum |
| { |
| POLARSSL_PK_DEBUG_NONE = 0, |
| POLARSSL_PK_DEBUG_MPI, |
| POLARSSL_PK_DEBUG_ECP, |
| } pk_debug_type; |
| |
| /** |
| * \brief Item to send to the debug module |
| */ |
| typedef struct |
| { |
| pk_debug_type type; |
| char *name; |
| void *value; |
| } pk_debug_item; |
| |
| /** Maximum number of item send for debugging, plus 1 */ |
| #define POLARSSL_PK_DEBUG_MAX_ITEMS 3 |
| |
| /** |
| * \brief Public key information and operations |
| */ |
| typedef struct |
| { |
| /** Public key type */ |
| pk_type_t type; |
| |
| /** Type name */ |
| const char *name; |
| |
| /** Get key size in bits */ |
| size_t (*get_size)( const void * ); |
| |
| /** Tell if the context implements this type (eg ECKEY can do ECDSA) */ |
| int (*can_do)( pk_type_t type ); |
| |
| /** Verify signature */ |
| int (*verify_func)( void *ctx, md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| const unsigned char *sig, size_t sig_len ); |
| |
| /** Make signature */ |
| int (*sign_func)( void *ctx, md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| unsigned char *sig, size_t *sig_len, |
| int (*f_rng)(void *, unsigned char *, size_t), |
| void *p_rng ); |
| |
| /** Decrypt message */ |
| int (*decrypt_func)( void *ctx, const unsigned char *input, size_t ilen, |
| unsigned char *output, size_t *olen, size_t osize, |
| int (*f_rng)(void *, unsigned char *, size_t), |
| void *p_rng ); |
| |
| /** Encrypt message */ |
| int (*encrypt_func)( void *ctx, const unsigned char *input, size_t ilen, |
| unsigned char *output, size_t *olen, size_t osize, |
| int (*f_rng)(void *, unsigned char *, size_t), |
| void *p_rng ); |
| |
| /** Allocate a new context */ |
| void * (*ctx_alloc_func)( void ); |
| |
| /** Free the given context */ |
| void (*ctx_free_func)( void *ctx ); |
| |
| /** Interface with the debug module */ |
| void (*debug_func)( const void *ctx, pk_debug_item *items ); |
| |
| } pk_info_t; |
| |
| /** |
| * \brief Public key container |
| */ |
| typedef struct |
| { |
| const pk_info_t * pk_info; /**< Public key informations */ |
| void * pk_ctx; /**< Underlying public key context */ |
| } pk_context; |
| |
| /** |
| * \brief Types for RSA-alt abstraction |
| */ |
| typedef int (*pk_rsa_alt_decrypt_func)( void *ctx, int mode, size_t *olen, |
| const unsigned char *input, unsigned char *output, |
| size_t output_max_len ); |
| typedef int (*pk_rsa_alt_sign_func)( void *ctx, |
| int (*f_rng)(void *, unsigned char *, size_t), void *p_rng, |
| int mode, int hash_id, unsigned int hashlen, |
| const unsigned char *hash, unsigned char *sig ); |
| typedef size_t (*pk_rsa_alt_key_len_func)( void *ctx ); |
| |
| /** |
| * \brief Return information associated with the given PK type |
| * |
| * \param type PK type to search for. |
| * |
| * \return The PK info associated with the type or NULL if not found. |
| */ |
| const pk_info_t *pk_info_from_type( pk_type_t pk_type ); |
| |
| /** |
| * \brief Initialize a pk_context (as NONE) |
| */ |
| void pk_init( pk_context *ctx ); |
| |
| /** |
| * \brief Free a pk_context |
| */ |
| void pk_free( pk_context *ctx ); |
| |
| /** |
| * \brief Initialize a PK context with the information given |
| * and allocates the type-specific PK subcontext. |
| * |
| * \param ctx Context to initialize. Must be empty (type NONE). |
| * \param info Information to use |
| * |
| * \return 0 on success, |
| * POLARSSL_ERR_PK_BAD_INPUT_DATA on invalid input, |
| * POLARSSL_ERR_PK_MALLOC_FAILED on allocation failure. |
| * |
| * \note For contexts holding an RSA-alt key, use |
| * \c pk_init_ctx_rsa_alt() instead. |
| */ |
| int pk_init_ctx( pk_context *ctx, const pk_info_t *info ); |
| |
| /** |
| * \brief Initialiaze an RSA-alt context |
| * |
| * \param ctx Context to initialize. Must be empty (type NONE). |
| * \param key RSA key pointer |
| * \param decrypt_func Decryption function |
| * \param sign_func Signing function |
| * \param key_len_func Function returning key length |
| * |
| * \return 0 on success, or POLARSSL_ERR_PK_BAD_INPUT_DATA if the |
| * context wasn't already initialized as RSA_ALT. |
| * |
| * \note This function replaces \c pk_init_ctx() for RSA-alt. |
| */ |
| int pk_init_ctx_rsa_alt( pk_context *ctx, void * key, |
| pk_rsa_alt_decrypt_func decrypt_func, |
| pk_rsa_alt_sign_func sign_func, |
| pk_rsa_alt_key_len_func key_len_func ); |
| |
| /** |
| * \brief Get the size in bits of the underlying key |
| * |
| * \param ctx Context to use |
| * |
| * \return Key size in bits, or 0 on error |
| */ |
| size_t pk_get_size( const pk_context *ctx ); |
| |
| /** |
| * \brief Get the length in bytes of the underlying key |
| * \param ctx Context to use |
| * |
| * \return Key lenght in bytes, or 0 on error |
| */ |
| static inline size_t pk_get_len( const pk_context *ctx ) |
| { |
| return( ( pk_get_size( ctx ) + 7 ) / 8 ); |
| } |
| |
| /** |
| * \brief Tell if a context can do the operation given by type |
| * |
| * \param ctx Context to test |
| * \param type Target type |
| * |
| * \return 0 if context can't do the operations, |
| * 1 otherwise. |
| */ |
| int pk_can_do( pk_context *ctx, pk_type_t type ); |
| |
| /** |
| * \brief Verify signature |
| * |
| * \param ctx PK context to use |
| * \param md_alg Hash algorithm used (see notes) |
| * \param hash Hash of the message to sign |
| * \param hash_len Hash length or 0 (see notes) |
| * \param sig Signature to verify |
| * \param sig_len Signature length |
| * |
| * \return 0 on success (signature is valid), |
| * or a specific error code. |
| * |
| * \note If hash_len is 0, then the length associated with md_alg |
| * is used instead, or an error returned if it is invalid. |
| * |
| * \note md_alg may be POLARSSL_MD_NONE, only if hash_len != 0 |
| */ |
| int pk_verify( pk_context *ctx, md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| const unsigned char *sig, size_t sig_len ); |
| |
| /** |
| * \brief Make signature |
| * |
| * \param ctx PK context to use |
| * \param md_alg Hash algorithm used (see notes) |
| * \param hash Hash of the message to sign |
| * \param hash_len Hash length or 0 (see notes) |
| * \param sig Place to write the signature |
| * \param sig_len Number of bytes written |
| * \param f_rng RNG function |
| * \param p_rng RNG parameter |
| * |
| * \return 0 on success, or a specific error code. |
| * |
| * \note If hash_len is 0, then the length associated with md_alg |
| * is used instead, or an error returned if it is invalid. |
| * |
| * \note md_alg may be POLARSSL_MD_NONE, only if hash_len != 0 |
| */ |
| int pk_sign( pk_context *ctx, md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| unsigned char *sig, size_t *sig_len, |
| int (*f_rng)(void *, unsigned char *, size_t), void *p_rng ); |
| |
| /** |
| * \brief Decrypt message |
| * |
| * \param ctx PK context to use |
| * \param input Input to decrypt |
| * \param ilen Input size |
| * \param output Decrypted output |
| * \param olen Decrypted message lenght |
| * \param osize Size of the output buffer |
| * |
| * \return 0 on success, or a specific error code. |
| */ |
| int pk_decrypt( pk_context *ctx, |
| const unsigned char *input, size_t ilen, |
| unsigned char *output, size_t *olen, size_t osize, |
| int (*f_rng)(void *, unsigned char *, size_t), void *p_rng ); |
| |
| /** |
| * \brief Encrypt message |
| * |
| * \param ctx PK context to use |
| * \param input Message to encrypt |
| * \param ilen Message size |
| * \param output Encrypted output |
| * \param olen Encrypted output length |
| * \param osize Size of the output buffer |
| * |
| * \return 0 on success, or a specific error code. |
| */ |
| int pk_encrypt( pk_context *ctx, |
| const unsigned char *input, size_t ilen, |
| unsigned char *output, size_t *olen, size_t osize, |
| int (*f_rng)(void *, unsigned char *, size_t), void *p_rng ); |
| |
| /** |
| * \brief Export debug information |
| * |
| * \param ctx Context to use |
| * \param items Place to write debug items |
| * |
| * \return 0 on sucess or POLARSSL_ERR_PK_BAD_INPUT_DATA |
| */ |
| int pk_debug( const pk_context *ctx, pk_debug_item *items ); |
| |
| /** |
| * \brief Access the type name |
| * |
| * \param ctx Context to use |
| * |
| * \return Type name on success, or "invalid PK" |
| */ |
| const char * pk_get_name( const pk_context *ctx ); |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* POLARSSL_PK_H */ |