2011-07-16 01:41:23 +00:00
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#ifndef _ECC_H_
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#define _ECC_H_H
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2011-07-16 17:12:35 +00:00
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#include <stdint.h>
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2011-07-16 01:41:23 +00:00
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2011-07-16 17:12:35 +00:00
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/******************************************************************************/
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#define DEGREE 163 /* the degree of the field polynomial */
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#define MARGIN 3 /* don't touch this */
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#define NUMWORDS ((DEGREE + MARGIN + 31) / 32)
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/* the following type will represent bit vectors of length (DEGREE+MARGIN) */
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typedef uint32_t bitstr_t[NUMWORDS];
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typedef bitstr_t elem_t; /* this type will represent field elements */
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typedef bitstr_t exp_t;
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int bitstr_parse_export(char *exp, const char *s);
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void ECIES_setup(void);
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void ECIES_encyptkeygen(uint8_t *px, uint8_t *py,
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2011-07-16 01:41:23 +00:00
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uint8_t k1[16], uint8_t k2[16], uint8_t *Rx_exp, uint8_t *Ry_exp);
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2011-07-16 17:12:35 +00:00
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int ECIES_decryptkeygen(uint8_t *rx, uint8_t *ry,
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2011-07-16 01:41:23 +00:00
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uint8_t k1[16], uint8_t k2[16], const char *privkey);
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#define ECIES_OVERHEAD (8 * NUMWORDS + 8)
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/* ECIES encryption; the resulting cipher text message will be
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(len + ECIES_OVERHEAD) bytes long */
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void ECIES_encryption(char *msg, const char *text, int len,
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const char *Px, const char *Py);
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/* ECIES decryption */
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int ECIES_decryption(char *text, const char *msg, int len,
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const char *privkey);
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#endif
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