ae3e7ae862
- function cipher now always disables automatic padding git-svn-id: https://vsmartcard.svn.sourceforge.net/svnroot/vsmartcard@52 96b47cad-a561-4643-ad3b-153ac7d7599c
120 lines
3.1 KiB
C
120 lines
3.1 KiB
C
#ifndef _UTIL_H_
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#define _UTIL_H_
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/**
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* @date 2009-11-30
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* @version 0.1
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* @author Frank Morgner <morgner@informatik.hu-berlin.de>
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* @author Dominik Oepen <oepen@informatik.hu-berlin.de>
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*/
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#include <openssl/buffer.h>
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#include <openssl/evp.h>
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#include <openssl/cmac.h>
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#include <openssl/ec.h>
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#include <openssl/pace.h>
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/**
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* @brief Wrapper for the OpenSSL hash functions.
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*
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* @param md
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* @param ctx (optional)
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* @param impl (optional)
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* @param in
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*
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* @return message digest or NULL if an error occurred
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*/
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BUF_MEM *
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hash(const EVP_MD * md, EVP_MD_CTX * ctx, ENGINE * impl, const BUF_MEM * in);
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/**
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* @brief Wrapper to the OpenSSL encryption functions.
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*
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* @param ctx (optional)
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* @param type
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* @param impl only evaluated if init is 1. (optional)
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* @param key only evaluated if init is 1.
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* @param iv only evaluated if init is 1. (optional)
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* @param enc only evaluated if init is 1.
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* @param in
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*
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* @return cipher of in or NULL if an error occurred
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*
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* @note automatic padding is disabled
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*/
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BUF_MEM *
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cipher(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *type, ENGINE *impl,
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unsigned char *key, unsigned char *iv, int enc, const BUF_MEM * in);
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/**
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* @brief Padds a buffer using ISO/IEC 9797-1 padding method 2.
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*
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* @param m buffer to padd
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* @param block_size pad to this block size
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*
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* @return new buffer with the padded input or NULL if an error occurred
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*/
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BUF_MEM *
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add_iso_pad(const BUF_MEM * m, int block_size);
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/**
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* @brief Encodes a send sequence counter according to TR-3110 F.3
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*
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* @param ssc Send sequence counter to encode (Formatted in big endian)
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* @param ctx PACE_CTX object
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*
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* @return BUF_MEM object containing the send sequence counter or NULL if an error occurred
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*
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* @note This function is automatically called during PACE, normally you should not need to use it.
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*/
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BUF_MEM * encoded_ssc(const uint16_t ssc, const PACE_CTX *ctx);
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#include <openssl/buffer.h>
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#include <openssl/ec.h>
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/**
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* @brief Creates a BUF_MEM object
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*
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* @param len required length of the buffer
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*
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* @return Initialized BUF_MEM object or NULL if an error occurred
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*/
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BUF_MEM *
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BUF_MEM_create(size_t len);
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/**
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* @brief Creates and initializes a BUF_MEM object
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*
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* @param buf Initial data
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* @param len Length of buf
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*
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* @return Initialized BUF_MEM object or NULL if an error occurred
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*/
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BUF_MEM *
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BUF_MEM_create_init(const void *buf, size_t len);
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/**
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* @brief converts an EC_POINT object to a BUF_MEM object
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*
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* @param ecdh EC_KEY object
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* @param bn_ctx object (optional)
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* @param ecp elliptic curve point to convert
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*
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* @return converted elliptic curve point or NULL if an error occurred
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*/
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BUF_MEM *
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point2buf(const EC_KEY * ecdh, BN_CTX * bn_ctx, const EC_POINT * ecp);
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/**
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* @brief converts an BIGNUM object to a BUF_MEM object
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*
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* @param bn bignumber to convert
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*
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* @return converted bignumber or NULL if an error occurred
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*/
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BUF_MEM *
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bn2buf(const BIGNUM *bn);
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/**
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* @brief duplicates a BUF_MEM structure
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*
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* @param in BUF_MEM to duplicate
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*
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* @return pointer to the new BUF_MEM or NULL in case of error
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*/
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BUF_MEM *
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BUF_MEM_dup(const BUF_MEM * in);
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#endif
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