#include "string-extras.h"
#endif
-void rsa_enc(bigint_t* data, rsa_publickey_t* key){
+void rsa_enc(bigint_t* data, const rsa_publickey_t* key){
/*
cli_putstr("\r\n -->rsa_enc()\r\n m = ");
bigint_print_hex(data);
cli_putstr("\r\n n = ");
bigint_print_hex(key->modulus);
*/
- bigint_expmod_u(data, data, key->exponent, key->modulus);
+ bigint_expmod_u(data, data, &key->exponent, &key->modulus);
}
/*
m = m2 + q * h
*/
-uint8_t rsa_dec_crt_mono(bigint_t* data, rsa_privatekey_t* key){
+uint8_t rsa_dec_crt_mono(bigint_t* data, const rsa_privatekey_t* key){
bigint_t m1, m2;
- m1.wordv = malloc(key->components[0]->length_B * sizeof(bigint_word_t));
- m2.wordv = malloc(key->components[1]->length_B * sizeof(bigint_word_t));
+ m1.wordv = malloc(key->components[0].length_W * sizeof(bigint_word_t));
+ m2.wordv = malloc(key->components[1].length_W * sizeof(bigint_word_t));
if(!m1.wordv || !m2.wordv){
#if DEBUG
cli_putstr("\r\nERROR: OOM!");
#endif
- free(m1.wordv);
free(m2.wordv);
+ free(m1.wordv);
return 1;
}
#if DEBUG
cli_putstr("\r\nDBG: expmod m1 ...");
#endif
- bigint_expmod_u(&m1, data, key->components[2], key->components[0]);
+ bigint_expmod_u(&m1, data, &key->components[2], &key->components[0]);
#if DEBUG
cli_putstr("expmod m2 ...");
#endif
- bigint_expmod_u(&m2, data, key->components[3], key->components[1]);
+ bigint_expmod_u(&m2, data, &key->components[3], &key->components[1]);
bigint_sub_s(&m1, &m1, &m2);
while(BIGINT_NEG_MASK & m1.info){
- bigint_add_s(&m1, &m1, key->components[0]);
+ bigint_add_s(&m1, &m1, &key->components[0]);
}
#if DEBUG
cli_putstr("\r\nDBG: reduce-mul ...");
#endif
- bigint_reduce(&m1, key->components[0]);
- bigint_mul_u(data, &m1, key->components[4]);
- bigint_reduce(data, key->components[0]);
- bigint_mul_u(data, data, key->components[1]);
+ bigint_reduce(&m1, &key->components[0]);
+ bigint_mul_u(data, &m1, &key->components[4]);
+ bigint_reduce(data, &key->components[0]);
+ bigint_mul_u(data, data, &key->components[1]);
bigint_add_u(data, data, &m2);
- free(m1.wordv);
free(m2.wordv);
+ free(m1.wordv);
return 0;
}
-uint8_t rsa_dec(bigint_t* data, rsa_privatekey_t* key){
+uint8_t rsa_dec(bigint_t* data, const rsa_privatekey_t* key){
if(key->n == 1){
- bigint_expmod_u(data, data, key->components[0], key->modulus);
+ bigint_expmod_u(data, data, &key->components[0], &key->modulus);
return 0;
}
if(key->n == 5){
if(data){
memcpy(dest->wordv, data, length_B)
}
- dest->length_B = length_B;
+ dest->length_W = length_B;
#else
uint8_t off;
off = (sizeof(bigint_word_t) - length_B % sizeof(bigint_word_t)) % sizeof(bigint_word_t);
memset(dest->wordv, 0, off);
}
}
- dest->length_B = (length_B + off) / sizeof(bigint_word_t);
+ dest->length_W = (length_B + off) / sizeof(bigint_word_t);
#if DEBUG
- cli_putstr("\r\nDBG: dest->length_B = 0x");
- cli_hexdump_rev(&(dest->length_B), 2);
+ cli_putstr("\r\nDBG: dest->length_W = 0x");
+ cli_hexdump_rev(&(dest->length_W), 2);
#endif
#endif
+ dest->info = 0;
bigint_changeendianess(dest);
bigint_adjust(dest);
}
void rsa_i2osp(void* dest, bigint_t* src, uint16_t* out_length_B){
#if BIGINT_WORD_SIZE == 8
if(dest){
- uint8_t *e = src->wordv + src->length_B;
+ uint8_t *e = src->wordv + src->length_W;
uint16_t i;
- for(i=src->length_B; i>0; --i){
+ for(i=src->length_W; i>0; --i){
*((uint8_t*)dest) = *--e;
dest = (uint8_t*)dest + 1;
}
bigint_changeendianess(src);
}
- *out_length_B = src->length_B;
+ *out_length_B = src->length_W;
#else
*out_length_B = bigint_get_first_set_bit(src) / 8 + 1;
if(dest){