/* Copyright 2005-2006, Voltage Security, all rights reserved.
 */

#include "vibecrypto.h"
#include "environment.h"
#include "base.h"
#include "libctx.h"
#include "algobj.h"
#include "pad.h"

#ifndef _P1_PAD_H
#define _P1_PAD_H

#ifdef __cplusplus
extern "C" {
#endif

/* P1 Type 1 padding needs to know how long the digest is supposed to
 * be, along with the digestInfo.
 * The digestInfo is the DER of the following
 *    SEQUENCE {
 *      digestAlg   AlgorithmIdentifier,
 *      digest      OCTET_STRING }
 * The digestInfo holds the SEQ and digestAlg.
 */
typedef struct
{
  unsigned char  *digestInfo;
  unsigned int    digestInfoLen;
  unsigned int    digestLen;
} VoltP1T1PadCtx;

#define VOLT_MD5_DIGEST_INFO_LEN 18
#define VOLT_MD5_DIGEST_INFO \
    0x30, 0x20, 0x30, 0x0c, 0x06, 0x08, 0x2a, 0x86, \
    0x48, 0x86, 0xf7, 0x0d, 0x02, 0x05, 0x05, 0x00, \
    0x04, 0x10
#define VOLT_SHA1_DIGEST_INFO_LEN 15
#define VOLT_SHA1_DIGEST_INFO \
    0x30, 0x21, 0x30, 0x09, 0x06, 0x05, 0x2b, 0x0e, \
    0x03, 0x02, 0x1a, 0x05, 0x00, 0x04, 0x14

#define VOLT_SHA224_DIGEST_INFO_LEN 19
#define VOLT_SHA224_DIGEST_INFO \
    0x30, 0x2d, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, \
    0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x04, 0x05, \
    0x00, 0x04, 0x1c
#define VOLT_SHA256_DIGEST_INFO_LEN 19
#define VOLT_SHA256_DIGEST_INFO \
    0x30, 0x31, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, \
    0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x01, 0x05, \
    0x00, 0x04, 0x20
#define VOLT_SHA384_DIGEST_INFO_LEN 19
#define VOLT_SHA384_DIGEST_INFO \
    0x30, 0x41, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, \
    0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x02, 0x05, \
    0x00, 0x04, 0x30
#define VOLT_SHA512_DIGEST_INFO_LEN 19
#define VOLT_SHA512_DIGEST_INFO \
    0x30, 0x51, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, \
    0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x03, 0x05, \
    0x00, 0x04, 0x40

/* Implements VPad.
 */
int VOLT_CALLING_CONV P1T1Pad VOLT_PROTO_LIST ((
   VoltAlgorithmObject *obj,
   VtRandomObject random,
   Pointer padCtx,
   unsigned char *block,
   unsigned int inputLen,
   unsigned int blockSize
));

/* Implements VUnpad.
 */
int VOLT_CALLING_CONV P1T1Unpad VOLT_PROTO_LIST ((
   VoltAlgorithmObject *obj,
   Pointer padCtx,
   unsigned char *block,
   unsigned int blockSize,
   unsigned int *outputLen
));

/* Implements VPad.
 */
int VOLT_CALLING_CONV P1T2Pad VOLT_PROTO_LIST ((
   VoltAlgorithmObject *obj,
   VtRandomObject random,
   Pointer padCtx,
   unsigned char *block,
   unsigned int inputLen,
   unsigned int blockSize
));

/* Implements VUnpad.
 */
int VOLT_CALLING_CONV P1T2Unpad VOLT_PROTO_LIST ((
   VoltAlgorithmObject *obj,
   Pointer padCtx,
   unsigned char *block,
   unsigned int blockSize,
   unsigned int *outputLen
));

/* This is the local pad ctx for the OAEP padding Impl.
 */
typedef struct
{
  VtAlgorithmObject    digester;
  unsigned char       *digestOfLabel;
  unsigned int         digestLen;
} VoltP1OaepCtx;

/* Implements VPad.
 */
int VOLT_CALLING_CONV P1OAEPad VOLT_PROTO_LIST ((
   VoltAlgorithmObject *obj,
   VtRandomObject random,
   Pointer padCtx,
   unsigned char *block,
   unsigned int inputLen,
   unsigned int blockSize
));

/* Implements VUnpad.
 */
int VOLT_CALLING_CONV P1OAEPUnpad VOLT_PROTO_LIST ((
   VoltAlgorithmObject *obj,
   Pointer padCtx,
   unsigned char *block,
   unsigned int blockSize,
   unsigned int *outputLen
));

/* Implements VCtxDestroy.
 */
void VOLT_CALLING_CONV P1OAEPCtxDestroy VOLT_PROTO_LIST ((
   Pointer object,
   Pointer context
));

#ifdef __cplusplus
}
#endif

#endif /* _P1_PAD_H */