ocrypto_rsa_primitives.h

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/*
 * Copyright (c) 2016 - 2024 Nordic Semiconductor ASA
 * Copyright (c) since 2013 Oberon microsystems AG
 *
 * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
 */
 
 
#ifndef OCRYPTO_RSA_PRIMITIVES_H
#define OCRYPTO_RSA_PRIMITIVES_H
 
#include <stddef.h>
#include <stdint.h>
 
 
#ifdef __cplusplus
extern "C" {
#endif
 
 
#define OCRYPTO_RSA_PUB_KEY_SIZE(bits) ((bits)/32)
 
#define OCRYPTO_RSA_KEY_SIZE(bits) ((bits)/32*2)
 
#define OCRYPTO_RSA_CRT_KEY_SIZE(bits) ((bits)/32*7/2)
 
 
#define OCRYPTO_RSA_PUB_MEM_SIZE(bits) ((bits)/32*11)
 
#define OCRYPTO_RSA_MEM_SIZE(bits) ((bits)/32*26)
 
#define OCRYPTO_RSA_CRT_MEM_SIZE(bits) ((bits)/32*14)
 
 
typedef struct {
    uint32_t *n;
    uint32_t e;
    int blocks; // block size of n
} ocrypto_rsa_pub_key;
 
typedef struct {
    uint32_t *n;
    uint32_t *d; // x^(e*d) mod n == x
    int blocks;  // block size of n
} ocrypto_rsa_key;
 
typedef struct {
    uint32_t *n;
    uint32_t *p;    // primes, p*q = n
    uint32_t *q;
    uint32_t *dp;   // d mod (p-1)
    uint32_t *dq;   // d mod (q-1)
    uint32_t *qinv; // 1/q mod p
    int blocks;     // block size of n
} ocrypto_rsa_crt_key;
int ocrypto_rsa_init_pub_key(
    ocrypto_rsa_pub_key *key,
    uint32_t *key_mem,
    const uint8_t *n, size_t n_len,
    uint32_t e);
 
int ocrypto_rsa_init_key(
    ocrypto_rsa_key *key,
    uint32_t *key_mem,
    const uint8_t *n, size_t n_len,
    const uint8_t *d, size_t d_len);
 
int ocrypto_rsa_init_crt_key(
    ocrypto_rsa_crt_key *key,
    uint32_t *key_mem,
    const uint8_t *p,    size_t p_len,
    const uint8_t *q,    size_t q_len,
    const uint8_t *dp,   size_t dp_len,
    const uint8_t *dq,   size_t dq_len,
    const uint8_t *qinv, size_t qi_len);
int ocrypto_rsa_pub_exp(
    uint8_t *c, size_t c_len,
    const uint8_t *m, size_t m_len,
    const ocrypto_rsa_pub_key *pk,
    uint32_t *mem);
 
int ocrypto_rsa_exp(
    uint8_t *m, size_t m_len,
    const uint8_t *c, size_t c_len,
    const ocrypto_rsa_key *key,
    uint32_t *mem);
 
int ocrypto_rsa_crt_exp(
    uint8_t *m, size_t m_len,
    const uint8_t *c, size_t c_len,
    const ocrypto_rsa_crt_key *key,
    uint32_t *mem); 
#ifdef __cplusplus
}
#endif
 
#endif