works with three tests; contains a lot debug foo
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@ -91,7 +91,7 @@ uint16_t bigint_length_b(bigint_t* a){
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/******************************************************************************/
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uint16_t bigint_length_B(bigint_t* a){
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return (bigint_length_b(a)+7)/8;
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return a->length_B * sizeof(bigint_word_t);
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}
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/******************************************************************************/
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@ -650,12 +650,18 @@ void bigint_sub_u_bitscale(bigint_t* a, const bigint_t* b, uint16_t bitscale){
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}
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while(borrow){
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if(i+1 > a->length_B){
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cli_putstr("\r\nDBG: *boom*\r\n");
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// char str[16];
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cli_putstr("\r\nDBG: *boom* a->length_B = ");
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cli_hexdump_rev(&a->length_B, 2);
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cli_putstr(" b->length_B = ");
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cli_hexdump_rev(&b->length_B, 2);
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cli_putstr(" bitscale = ");
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cli_hexdump_rev(&bitscale, 2);
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bigint_set_zero(a);
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return;
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}
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a->wordv[i] -= borrow;
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if(a->wordv[i]!=0xff){
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if(a->wordv[i] != (1LL<<BIGINT_WORD_SIZE) - 1){
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borrow=0;
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}
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++i;
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@ -686,9 +692,16 @@ void bigint_reduce(bigint_t* a, const bigint_t* r){
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uint16_t shift;
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while(a->length_B > r->length_B){
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shift = (a->length_B - r->length_B) * 8 * sizeof(bigint_word_t) + GET_FBS(a) - rfbs - 1;
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if(a->wordv[a->length_B-1] > r->wordv[r->length_B-1]){
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/*
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if((a->wordv[a->length_B-1] & ((1LL<<GET_FBS(a)) - 1)) > r->wordv[r->length_B-1]){
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// cli_putc('~');
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cli_putstr("\r\n ~ [a] = ");
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cli_hexdump_rev(&a->wordv[a->length_B-1], 4);
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cli_putstr(" [r] = ");
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cli_hexdump_rev(&r->wordv[r->length_B-1], 4);
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shift += 1;
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}
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*/
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// cli_putstr("\r\nDBG: (p) shift = "); cli_hexdump_rev(&shift, 2);
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// cli_putstr(" a_len = "); cli_hexdump_rev(&a->length_B, 2);
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// cli_putstr(" r_len = "); cli_hexdump_rev(&r->length_B, 2);
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@ -21,11 +21,19 @@
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#include <stdlib.h>
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#include <string.h>
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#include "bigint.h"
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#include "bigint_io.h"
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#include "rsa_basic.h"
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#include "cli.h"
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#include "uart_lowlevel.h"
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void rsa_enc(bigint_t* data, rsa_publickey_t* key){
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cli_putstr("\r\n -->rsa_enc()\r\n m = ");
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bigint_print_hex(data);
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cli_putstr("\r\n e = ");
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bigint_print_hex(key->exponent);
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cli_putstr("\r\n n = ");
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bigint_print_hex(key->modulus);
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bigint_expmod_u(data, data, key->exponent, key->modulus);
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}
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@ -39,24 +47,34 @@ m = m2 + q * h
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uint8_t rsa_dec_crt_mono(bigint_t* data, rsa_privatekey_t* key){
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bigint_t m1, m2;
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cli_putstr("\r\n --> rsa_dec_crt_mono()");
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uart_flush(0);
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m1.wordv = malloc(key->components[0]->length_B * sizeof(bigint_word_t));
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m2.wordv = malloc(key->components[1]->length_B * sizeof(bigint_word_t));
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if(!m1.wordv || !m2.wordv){
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cli_putstr("\r\nERROR: OOM!");
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free(m1.wordv);
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free(m2.wordv);
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return 1;
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}
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cli_putc('a'); uart_flush(0);
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bigint_expmod_u(&m1, data, key->components[2], key->components[0]);
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cli_putc('f'); uart_flush(0);
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bigint_expmod_u(&m2, data, key->components[3], key->components[1]);
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cli_putc('b'); uart_flush(0);
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bigint_sub_s(&m1, &m1, &m2);
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while(BIGINT_NEG_MASK & m1.info){
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bigint_add_s(&m1, &m1, key->components[0]);
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}
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cli_putc('c'); uart_flush(0);
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bigint_reduce(&m1, key->components[0]);
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bigint_mul_u(data, &m1, key->components[4]);
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cli_putc('d'); uart_flush(0);
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bigint_reduce(data, key->components[0]);
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bigint_mul_u(data, data, key->components[1]);
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bigint_add_u(data, data, &m2);
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cli_putc('e'); uart_flush(0);
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free(m1.wordv);
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free(m2.wordv);
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return 0;
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@ -31,6 +31,9 @@
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#include "hfal/hfal_sha1.h"
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#include "cli.h"
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#include "uart_lowlevel.h"
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mgf1_parameter_t mgf1_default_parameter = {
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&sha1_desc
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};
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@ -62,6 +65,10 @@ uint8_t rsa_encrypt_oaep(void* dest, uint16_t* out_length,
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return 1;
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}
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uint16_t buffer_len = bigint_length_B(key->modulus);
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cli_putstr("\r\n buffer_len = ");
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cli_hexdump_rev(&buffer_len, 2);
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cli_putstr("\r\n modulus_len = ");
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cli_hexdump_rev(&key->modulus->length_B, 2);
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uint8_t* buffer = (uint8_t*)dest;
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uint8_t off;
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/* the following needs some explanation:
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@ -72,6 +79,8 @@ uint8_t rsa_encrypt_oaep(void* dest, uint16_t* out_length,
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% (sizeof(bigint_word_t));
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buffer += off;
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buffer_len -= off;
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cli_putstr("\r\n off = ");
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cli_hexdump_byte(off);
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uint8_t* seed_buffer = buffer + 1;
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uint16_t db_len = buffer_len - hv_len - 1;
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uint8_t* db = seed_buffer + hv_len;
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@ -79,7 +88,7 @@ uint8_t rsa_encrypt_oaep(void* dest, uint16_t* out_length,
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uint8_t maskbuffer[maskbuffer_len];
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bigint_t x;
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memset(buffer, 0, seed_buffer - buffer);
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memset(dest, 0, seed_buffer - buffer + off);
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memset(db + hv_len, 0, db_len - hv_len - length_B -1);
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hfal_hash_mem(p->hf, db, label->label, label->length_b);
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db[db_len - length_B - 1] = 0x01;
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@ -96,11 +105,14 @@ uint8_t rsa_encrypt_oaep(void* dest, uint16_t* out_length,
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seed_buffer[i] = prng_get_byte();
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}
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}
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cli_putstr("\r\n msg (raw, pre-feistel):\r\n");
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cli_hexdump_block(dest, bigint_length_B(key->modulus), 4, 16);
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p->mgf(maskbuffer, seed_buffer, hv_len, db_len, p->mgf_parameter);
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memxor(db, maskbuffer, db_len);
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p->mgf(maskbuffer, db, db_len, hv_len, p->mgf_parameter);
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memxor(seed_buffer, maskbuffer, hv_len);
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cli_putstr("\r\n msg (raw, post-feistel):\r\n");
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cli_hexdump_block(dest, bigint_length_B(key->modulus), 4, 16);
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x.wordv = dest;
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x.length_B = key->modulus->length_B;
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@ -117,47 +129,62 @@ uint8_t rsa_decrypt_oaep(void* dest, uint16_t* out_length,
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rsa_privatekey_t* key, const rsa_oaep_parameter_t *p,
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const rsa_label_t* label, void* seed){
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cli_putstr("\r\n -->rsa_decrypt_oaep()"); uart_flush(0);
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if(!label){
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label = &rsa_oaep_default_label;
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}
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if(!p){
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p = &rsa_oaep_default_parameter;
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}
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uint8_t *buffer = dest;
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uint16_t x_len, data_len;
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bigint_t x;
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uint16_t hv_len = hfal_hash_getHashsize(p->hf)/8;
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uint8_t label_hv[hv_len];
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uint16_t msg_len = (bigint_get_first_set_bit(key->modulus)+7)/8;
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uint16_t db_len = msg_len - 1 - hv_len;
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uint16_t msg_len = bigint_get_first_set_bit(key->modulus) / 8 + 1;
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uint16_t db_len = msg_len - hv_len - 1;
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uint8_t maskbuffer[db_len>hv_len?db_len:hv_len];
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uint8_t *seed_buffer = buffer + 1;
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uint8_t *seed_buffer = dest;
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uint8_t *db_buffer = seed_buffer + hv_len;
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x_len = bigint_length_B(key->modulus);
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memset(dest, 0, x_len - length_B);
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buffer = (uint8_t*)dest + x_len - length_B;
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memcpy(buffer, src, length_B);
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x_len = bigint_get_first_set_bit(key->modulus)/8;
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memset(dest, 0, bigint_length_B(key->modulus) - length_B);
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memcpy((uint8_t*)dest + bigint_length_B(key->modulus) - length_B, src, length_B);
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cli_putc('a'); uart_flush(0);
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x.wordv = dest;
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x.length_B = key->modulus->length_B;
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x.info = 0;
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bigint_adjust(&x);
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cli_putc('b'); uart_flush(0);
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rsa_os2ip(&x, NULL, bigint_length_B(key->modulus));
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cli_putc('c'); uart_flush(0);
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rsa_dec(&x, key);
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cli_putc('d'); uart_flush(0);
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rsa_i2osp(NULL, &x, &data_len);
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/*
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if(data_len != x_len){
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memmove(buffer + x_len - data_len, buffer, data_len);
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memset(buffer, 0, x_len - data_len);
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}
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*/
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if(data_len > msg_len){
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cli_putstr("\r\n msg (raw, pre-move):\r\n");
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cli_hexdump_block(dest, bigint_length_B(key->modulus), 4, 16);
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if(data_len > x_len){
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return 7;
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}
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memmove(buffer + msg_len - data_len, buffer, data_len);
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cli_putstr("\r\n moving some bytes; x_len = ");
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cli_hexdump_rev(&x_len, 2);
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cli_putstr(" data_len = ");
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cli_hexdump_rev(&data_len, 2);
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uart_flush(0);
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if(x_len != data_len){
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memmove((uint8_t*)dest + x_len - data_len, dest, data_len);
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cli_putstr(" (oh, not dead yet?!)");
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uart_flush(0);
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memset(dest, 0, x_len - data_len);
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}
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hfal_hash_mem(p->hf, label_hv, label->label, label->length_b);
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/*
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@ -165,12 +192,19 @@ uint8_t rsa_decrypt_oaep(void* dest, uint16_t* out_length,
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return 1;
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}
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*/
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cli_putstr("\r\n msg (raw, pre-feistel):\r\n");
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cli_hexdump_block(seed_buffer, bigint_length_B(key->modulus), 4, 16);
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uart_flush(0);
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p->mgf(maskbuffer, db_buffer, db_len, hv_len, p->mgf_parameter);
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memxor(seed_buffer, maskbuffer, hv_len);
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p->mgf(maskbuffer, seed_buffer, hv_len, db_len, p->mgf_parameter);
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memxor(db_buffer, maskbuffer, db_len);
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if(memcmp(label_hv, db_buffer, hv_len)){
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cli_putstr("\r\nDBG: DB:\r\n");
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cli_hexdump_block(db_buffer, db_len, 4, 16);
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return 2;
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}
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@ -39,7 +39,7 @@ typedef struct {
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} rsa_label_t;
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extern rsa_oaep_parameter_t rsa_oaep_default_parameter;
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extern rsa_label_t rsa_oaep_default_label;
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uint8_t rsa_encrypt_oaep(void* dest, uint16_t* out_length,
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const void* src, uint16_t length_B,
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@ -34,6 +34,9 @@
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const char* algo_name = "RSA-OAEP";
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#define BIGINT_CEIL(x) ((((x) + sizeof(bigint_word_t) - 1) / sizeof(bigint_word_t)) * sizeof(bigint_word_t))
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#define BIGINT_OFF(x) ((sizeof(bigint_word_t) - (x) % sizeof(bigint_word_t)) % sizeof(bigint_word_t))
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/*****************************************************************************
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* additional validation-functions *
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*****************************************************************************/
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@ -167,9 +170,326 @@ const uint8_t encrypted2[] = {
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0x15, 0x91, 0x2d, 0xf6, 0x96, 0xff, 0xe0, 0x70, 0x29, 0x32, 0x94, 0x6d, 0x71, 0x49, 0x2b, 0x44
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};
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/**********************************************************************************************/
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/* ---------------------------------
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* RSAES-OAEP Encryption Example 2.1
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* --------------------------------- */
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/* Message to be encrypted: */
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const uint8_t message3[] = {
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0x8f, 0xf0, 0x0c, 0xaa, 0x60, 0x5c, 0x70, 0x28, 0x30, 0x63, 0x4d, 0x9a, 0x6c, 0x3d, 0x42, 0xc6,
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0x52, 0xb5, 0x8c, 0xf1, 0xd9, 0x2f, 0xec, 0x57, 0x0b, 0xee, 0xe7
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};
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/* Seed: */
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const uint8_t seed3[] = {
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0x8c, 0x40, 0x7b, 0x5e, 0xc2, 0x89, 0x9e, 0x50, 0x99, 0xc5, 0x3e, 0x8c, 0xe7, 0x93, 0xbf, 0x94,
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0xe7, 0x1b, 0x17, 0x82
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};
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/* Encryption: */
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const uint8_t encrypted3[] = {
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0x01, 0x81, 0xaf, 0x89, 0x22, 0xb9, 0xfc, 0xb4, 0xd7, 0x9d, 0x92, 0xeb, 0xe1, 0x98, 0x15, 0x99,
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0x2f, 0xc0, 0xc1, 0x43, 0x9d, 0x8b, 0xcd, 0x49, 0x13, 0x98, 0xa0, 0xf4, 0xad, 0x3a, 0x32, 0x9a,
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0x5b, 0xd9, 0x38, 0x55, 0x60, 0xdb, 0x53, 0x26, 0x83, 0xc8, 0xb7, 0xda, 0x04, 0xe4, 0xb1, 0x2a,
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0xed, 0x6a, 0xac, 0xdf, 0x47, 0x1c, 0x34, 0xc9, 0xcd, 0xa8, 0x91, 0xad, 0xdc, 0xc2, 0xdf, 0x34,
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0x56, 0x65, 0x3a, 0xa6, 0x38, 0x2e, 0x9a, 0xe5, 0x9b, 0x54, 0x45, 0x52, 0x57, 0xeb, 0x09, 0x9d,
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0x56, 0x2b, 0xbe, 0x10, 0x45, 0x3f, 0x2b, 0x6d, 0x13, 0xc5, 0x9c, 0x02, 0xe1, 0x0f, 0x1f, 0x8a,
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0xbb, 0x5d, 0xa0, 0xd0, 0x57, 0x09, 0x32, 0xda, 0xcf, 0x2d, 0x09, 0x01, 0xdb, 0x72, 0x9d, 0x0f,
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0xef, 0xcc, 0x05, 0x4e, 0x70, 0x96, 0x8e, 0xa5, 0x40, 0xc8, 0x1b, 0x04, 0xbc, 0xae, 0xfe, 0x72,
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0x0e
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};
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/**********************************************************************************************/
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/* RSA modulus n: */
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const uint8_t modulus2[] = {
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0x01, 0x94, 0x7c, 0x7f, 0xce, 0x90, 0x42, 0x5f, 0x47, 0x27, 0x9e, 0x70, 0x85, 0x1f, 0x25, 0xd5,
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0xe6, 0x23, 0x16, 0xfe, 0x8a, 0x1d, 0xf1, 0x93, 0x71, 0xe3, 0xe6, 0x28, 0xe2, 0x60, 0x54, 0x3e,
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0x49, 0x01, 0xef, 0x60, 0x81, 0xf6, 0x8c, 0x0b, 0x81, 0x41, 0x19, 0x0d, 0x2a, 0xe8, 0xda, 0xba,
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0x7d, 0x12, 0x50, 0xec, 0x6d, 0xb6, 0x36, 0xe9, 0x44, 0xec, 0x37, 0x22, 0x87, 0x7c, 0x7c, 0x1d,
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0x0a, 0x67, 0xf1, 0x4b, 0x16, 0x94, 0xc5, 0xf0, 0x37, 0x94, 0x51, 0xa4, 0x3e, 0x49, 0xa3, 0x2d,
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0xde, 0x83, 0x67, 0x0b, 0x73, 0xda, 0x91, 0xa1, 0xc9, 0x9b, 0xc2, 0x3b, 0x43, 0x6a, 0x60, 0x05,
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0x5c, 0x61, 0x0f, 0x0b, 0xaf, 0x99, 0xc1, 0xa0, 0x79, 0x56, 0x5b, 0x95, 0xa3, 0xf1, 0x52, 0x66,
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0x32, 0xd1, 0xd4, 0xda, 0x60, 0xf2, 0x0e, 0xda, 0x25, 0xe6, 0x53, 0xc4, 0xf0, 0x02, 0x76, 0x6f,
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0x45
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};
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/* RSA public exponent e: */
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const uint8_t public_exponent2[] = {
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0x01, 0x00, 0x01
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};
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/* RSA private exponent d: */
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const uint8_t private_exponent2[] = {
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0x08, 0x23, 0xf2, 0x0f, 0xad, 0xb5, 0xda, 0x89, 0x08, 0x8a, 0x9d, 0x00, 0x89, 0x3e, 0x21, 0xfa,
|
||||
0x4a, 0x1b, 0x11, 0xfb, 0xc9, 0x3c, 0x64, 0xa3, 0xbe, 0x0b, 0xaa, 0xea, 0x97, 0xfb, 0x3b, 0x93,
|
||||
0xc3, 0xff, 0x71, 0x37, 0x04, 0xc1, 0x9c, 0x96, 0x3c, 0x1d, 0x10, 0x7a, 0xae, 0x99, 0x05, 0x47,
|
||||
0x39, 0xf7, 0x9e, 0x02, 0xe1, 0x86, 0xde, 0x86, 0xf8, 0x7a, 0x6d, 0xde, 0xfe, 0xa6, 0xd8, 0xcc,
|
||||
0xd1, 0xd3, 0xc8, 0x1a, 0x47, 0xbf, 0xa7, 0x25, 0x5b, 0xe2, 0x06, 0x01, 0xa4, 0xa4, 0xb2, 0xf0,
|
||||
0x8a, 0x16, 0x7b, 0x5e, 0x27, 0x9d, 0x71, 0x5b, 0x1b, 0x45, 0x5b, 0xdd, 0x7e, 0xab, 0x24, 0x59,
|
||||
0x41, 0xd9, 0x76, 0x8b, 0x9a, 0xce, 0xfb, 0x3c, 0xcd, 0xa5, 0x95, 0x2d, 0xa3, 0xce, 0xe7, 0x25,
|
||||
0x25, 0xb4, 0x50, 0x16, 0x63, 0xa8, 0xee, 0x15, 0xc9, 0xe9, 0x92, 0xd9, 0x24, 0x62, 0xfe, 0x39
|
||||
};
|
||||
|
||||
/* Prime p: */
|
||||
const uint8_t p2[] = {
|
||||
0x01, 0x59, 0xdb, 0xde, 0x04, 0xa3, 0x3e, 0xf0, 0x6f, 0xb6, 0x08, 0xb8, 0x0b, 0x19, 0x0f, 0x4d,
|
||||
0x3e, 0x22, 0xbc, 0xc1, 0x3a, 0xc8, 0xe4, 0xa0, 0x81, 0x03, 0x3a, 0xbf, 0xa4, 0x16, 0xed, 0xb0,
|
||||
0xb3, 0x38, 0xaa, 0x08, 0xb5, 0x73, 0x09, 0xea, 0x5a, 0x52, 0x40, 0xe7, 0xdc, 0x6e, 0x54, 0x37,
|
||||
0x8c, 0x69, 0x41, 0x4c, 0x31, 0xd9, 0x7d, 0xdb, 0x1f, 0x40, 0x6d, 0xb3, 0x76, 0x9c, 0xc4, 0x1a,
|
||||
0x43
|
||||
};
|
||||
|
||||
/* Prime q: */
|
||||
const uint8_t q2[] = {
|
||||
0x01, 0x2b, 0x65, 0x2f, 0x30, 0x40, 0x3b, 0x38, 0xb4, 0x09, 0x95, 0xfd, 0x6f, 0xf4, 0x1a, 0x1a,
|
||||
0xcc, 0x8a, 0xda, 0x70, 0x37, 0x32, 0x36, 0xb7, 0x20, 0x2d, 0x39, 0xb2, 0xee, 0x30, 0xcf, 0xb4,
|
||||
0x6d, 0xb0, 0x95, 0x11, 0xf6, 0xf3, 0x07, 0xcc, 0x61, 0xcc, 0x21, 0x60, 0x6c, 0x18, 0xa7, 0x5b,
|
||||
0x8a, 0x62, 0xf8, 0x22, 0xdf, 0x03, 0x1b, 0xa0, 0xdf, 0x0d, 0xaf, 0xd5, 0x50, 0x6f, 0x56, 0x8b,
|
||||
0xd7
|
||||
};
|
||||
|
||||
/* p's CRT exponent dP: */
|
||||
const uint8_t dp2[] = {
|
||||
0x43, 0x6e, 0xf5, 0x08, 0xde, 0x73, 0x65, 0x19, 0xc2, 0xda, 0x4c, 0x58, 0x0d, 0x98, 0xc8, 0x2c,
|
||||
0xb7, 0x45, 0x2a, 0x3f, 0xb5, 0xef, 0xad, 0xc3, 0xb9, 0xc7, 0x78, 0x9a, 0x1b, 0xc6, 0x58, 0x4f,
|
||||
0x79, 0x5a, 0xdd, 0xbb, 0xd3, 0x24, 0x39, 0xc7, 0x46, 0x86, 0x55, 0x2e, 0xcb, 0x6c, 0x2c, 0x30,
|
||||
0x7a, 0x4d, 0x3a, 0xf7, 0xf5, 0x39, 0xee, 0xc1, 0x57, 0x24, 0x8c, 0x7b, 0x31, 0xf1, 0xa2, 0x55
|
||||
};
|
||||
|
||||
/* q's CRT exponent dQ: */
|
||||
const uint8_t dq2[] = {
|
||||
0x01, 0x2b, 0x15, 0xa8, 0x9f, 0x3d, 0xfb, 0x2b, 0x39, 0x07, 0x3e, 0x73, 0xf0, 0x2b, 0xdd, 0x0c,
|
||||
0x1a, 0x7b, 0x37, 0x9d, 0xd4, 0x35, 0xf0, 0x5c, 0xdd, 0xe2, 0xef, 0xf9, 0xe4, 0x62, 0x94, 0x8b,
|
||||
0x7c, 0xec, 0x62, 0xee, 0x90, 0x50, 0xd5, 0xe0, 0x81, 0x6e, 0x07, 0x85, 0xa8, 0x56, 0xb4, 0x91,
|
||||
0x08, 0xdc, 0xb7, 0x5f, 0x36, 0x83, 0x87, 0x4d, 0x1c, 0xa6, 0x32, 0x9a, 0x19, 0x01, 0x30, 0x66,
|
||||
0xff
|
||||
};
|
||||
|
||||
/* CRT coefficient qInv: */
|
||||
const uint8_t qinv2[] = {
|
||||
0x02, 0x70, 0xdb, 0x17, 0xd5, 0x91, 0x4b, 0x01, 0x8d, 0x76, 0x11, 0x8b, 0x24, 0x38, 0x9a, 0x73,
|
||||
0x50, 0xec, 0x83, 0x6b, 0x00, 0x63, 0xa2, 0x17, 0x21, 0x23, 0x6f, 0xd8, 0xed, 0xb6, 0xd8, 0x9b,
|
||||
0x51, 0xe7, 0xee, 0xb8, 0x7b, 0x61, 0x1b, 0x71, 0x32, 0xcb, 0x7e, 0xa7, 0x35, 0x6c, 0x23, 0x15,
|
||||
0x1c, 0x1e, 0x77, 0x51, 0x50, 0x7c, 0x78, 0x6d, 0x9e, 0xe1, 0x79, 0x41, 0x70, 0xa8, 0xc8, 0xe8
|
||||
};
|
||||
|
||||
/**********************************************************************************************/
|
||||
|
||||
|
||||
uint8_t keys_allocated = 0;
|
||||
rsa_publickey_t pub_key;
|
||||
rsa_privatekey_t priv_key;
|
||||
|
||||
#if 0
|
||||
#define MSG message
|
||||
#define SEED seed
|
||||
#define ENCRYPTED encrypted
|
||||
#define MODULUS modulus
|
||||
#define PUB_EXPONENT public_exponent
|
||||
#define PRIV_EXPONENT private_exponent
|
||||
#define P p
|
||||
#define Q q
|
||||
#define DP dp
|
||||
#define DQ dq
|
||||
#define QINV qinv
|
||||
#else
|
||||
#define MSG message3
|
||||
#define SEED seed3
|
||||
#define ENCRYPTED encrypted3
|
||||
#define MODULUS modulus2
|
||||
#define PUB_EXPONENT public_exponent2
|
||||
#define PRIV_EXPONENT private_exponent2
|
||||
#define P p2
|
||||
#define Q q2
|
||||
#define DP dp2
|
||||
#define DQ dq2
|
||||
#define QINV qinv2
|
||||
#endif
|
||||
|
||||
|
||||
uint8_t convert_nibble(uint8_t c){
|
||||
if(c>='0' && c<='9'){
|
||||
return c - '0';
|
||||
}
|
||||
c |= 'A' ^ 'a';
|
||||
if(c>='a' && c<='f'){
|
||||
return c - 'a' + 10;
|
||||
}
|
||||
return 0xff;
|
||||
}
|
||||
|
||||
const char *block_ignore_string=" \t\r\n,;";
|
||||
|
||||
uint16_t read_os(void* dst, uint16_t length, const char* ignore_string){
|
||||
uint16_t counter = 0;
|
||||
uint16_t c;
|
||||
uint8_t v, tmp = 0, idx = 0;
|
||||
if(!ignore_string){
|
||||
ignore_string = block_ignore_string;
|
||||
}
|
||||
while(counter < length){
|
||||
c = cli_getc();
|
||||
if(c > 0xff){
|
||||
return counter;
|
||||
}
|
||||
if(strchr(ignore_string, c)){
|
||||
continue;
|
||||
}
|
||||
v = convert_nibble(c);
|
||||
if(v > 0x0f){
|
||||
return counter;
|
||||
}
|
||||
if(idx){
|
||||
((uint8_t*)dst)[counter++] = (tmp << 4) | v;
|
||||
idx = 0;
|
||||
}else{
|
||||
tmp = v;
|
||||
idx = 1;
|
||||
}
|
||||
}
|
||||
return counter;
|
||||
}
|
||||
|
||||
uint16_t own_atou(const char* str){
|
||||
uint16_t r=0;
|
||||
while(*str && *str >= '0' && *str <= '9'){
|
||||
r *= 10;
|
||||
r += *str++ - '0';
|
||||
}
|
||||
return r;
|
||||
}
|
||||
|
||||
uint8_t read_bigint(bigint_t* a, char* prompt){
|
||||
uint16_t read_length, actual_length;
|
||||
uint8_t off;
|
||||
uint8_t *buffer;
|
||||
char read_int_str[18];
|
||||
cli_putstr(prompt);
|
||||
cli_putstr("\r\n length: ");
|
||||
cli_getsn(read_int_str, 16);
|
||||
read_length = own_atou(read_int_str);
|
||||
off = (sizeof(bigint_word_t) - (read_length % sizeof(bigint_word_t))) % sizeof(bigint_word_t);
|
||||
buffer = malloc(((read_length + sizeof(bigint_word_t) - 1) / sizeof(bigint_word_t)) * sizeof(bigint_word_t));
|
||||
if(!buffer){
|
||||
cli_putstr("\r\nERROR: OOM!");
|
||||
return 2;
|
||||
}
|
||||
cli_putstr("\r\n data: ");
|
||||
memset(buffer, 0, sizeof(bigint_word_t));
|
||||
actual_length = read_os(buffer + off, read_length, NULL);
|
||||
if(actual_length != read_length){
|
||||
cli_putstr("\r\nERROR: unexpected end of data!");
|
||||
free(buffer);
|
||||
return 1;
|
||||
}
|
||||
a->wordv = (bigint_word_t*)buffer;
|
||||
a->length_B = (read_length + sizeof(bigint_word_t) - 1) / sizeof(bigint_word_t);
|
||||
bigint_changeendianess(a);
|
||||
bigint_adjust(a);
|
||||
return 0;
|
||||
}
|
||||
|
||||
uint8_t pre_alloc_key_crt(void){
|
||||
uint8_t c;
|
||||
pub_key.modulus = malloc(sizeof(bigint_t));
|
||||
if(!pub_key.modulus){
|
||||
cli_putstr("\r\nERROR: OOM!");
|
||||
return 2;
|
||||
}
|
||||
priv_key.modulus = pub_key.modulus;
|
||||
priv_key.n = 5;
|
||||
priv_key.components = malloc(5 * sizeof(bigint_t*));
|
||||
if(!priv_key.components){
|
||||
cli_putstr("\r\nERROR: OOM!");
|
||||
return 2;
|
||||
}
|
||||
pub_key.exponent = malloc(sizeof(bigint_t));
|
||||
if(!pub_key.exponent){
|
||||
cli_putstr("\r\nERROR: OOM!");
|
||||
return 2;
|
||||
}
|
||||
for(c=0; c<5; ++c){
|
||||
priv_key.components[c] = malloc(sizeof(bigint_t));
|
||||
if(!priv_key.components[c]){
|
||||
cli_putstr("\r\nERROR: OOM!");
|
||||
return 2;
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
void free_key(void){
|
||||
uint8_t c;
|
||||
free(pub_key.modulus->wordv);
|
||||
free(pub_key.exponent->wordv);
|
||||
free(pub_key.modulus);
|
||||
pub_key.modulus = priv_key.modulus = NULL;
|
||||
free(pub_key.exponent);
|
||||
pub_key.exponent = NULL;
|
||||
for(c = 0; c < priv_key.n; ++c){
|
||||
free(priv_key.components[c]->wordv);
|
||||
free(priv_key.components[c]);
|
||||
}
|
||||
free(priv_key.components);
|
||||
priv_key.components = NULL;
|
||||
}
|
||||
|
||||
uint8_t read_key_crt(void){
|
||||
uint8_t r;
|
||||
cli_putstr("\r\n== reading key (crt) ==");
|
||||
r = pre_alloc_key_crt();
|
||||
if(r) return r;
|
||||
r = read_bigint(pub_key.modulus,"\r\n = module =");
|
||||
if(r) return r;
|
||||
r = read_bigint(pub_key.exponent,"\r\n = public exponent =");
|
||||
if(r) return r;
|
||||
r = read_bigint(priv_key.components[0],"\r\n = p (first prime) =");
|
||||
if(r) return r;
|
||||
r = read_bigint(priv_key.components[1],"\r\n = q (second prime) =");
|
||||
if(r) return r;
|
||||
r = read_bigint(priv_key.components[2],"\r\n = dp (p's exponent) =");
|
||||
if(r) return r;
|
||||
r = read_bigint(priv_key.components[3],"\r\n = dq (q's exponent) =");
|
||||
if(r) return r;
|
||||
r = read_bigint(priv_key.components[4],"\r\n = qInv (q' coefficient) =");
|
||||
return r;
|
||||
}
|
||||
|
||||
uint8_t read_key_conv(void){
|
||||
uint8_t r;
|
||||
cli_putstr("\r\n== reading key (crt) ==");
|
||||
pub_key.modulus = malloc(sizeof(bigint_t));
|
||||
if(!pub_key.modulus){
|
||||
cli_putstr("\r\nERROR: OOM!");
|
||||
return 2;
|
||||
}
|
||||
r = read_bigint(pub_key.modulus,"\r\n = module =");
|
||||
if(r) return r;
|
||||
priv_key.modulus = pub_key.modulus;
|
||||
priv_key.n = 1;
|
||||
pub_key.exponent = malloc(sizeof(bigint_t));
|
||||
if(!pub_key.exponent){
|
||||
cli_putstr("\r\nERROR: OOM!");
|
||||
return 2;
|
||||
}
|
||||
priv_key.components = malloc(sizeof(bigint_t*));
|
||||
if(!priv_key.components){
|
||||
cli_putstr("\r\nERROR: OOM!");
|
||||
return 2;
|
||||
}
|
||||
priv_key.components[0] = malloc(sizeof(bigint_t));
|
||||
if(!priv_key.components[0]){
|
||||
cli_putstr("\r\nERROR: OOM!");
|
||||
return 2;
|
||||
}
|
||||
r = read_bigint(pub_key.exponent,"\r\n = public exponent =");
|
||||
if(r) return r;
|
||||
r = read_bigint(priv_key.components[0],"\r\n = private exponent =");
|
||||
return r;
|
||||
}
|
||||
|
||||
void load_priv_conventional(void){
|
||||
bigint_t *epriv;
|
||||
epriv = malloc(sizeof(bigint_t));
|
||||
|
|
@ -224,46 +544,44 @@ void load_priv_crt_mono(void){
|
|||
}
|
||||
}
|
||||
|
||||
|
||||
void load_fix_rsa(void){
|
||||
bigint_t *m, *epub;
|
||||
m = malloc(sizeof(bigint_t));
|
||||
epub = malloc(sizeof(bigint_t));
|
||||
if(!m || !epub){
|
||||
uint8_t load_bigint_from_os(bigint_t* a, const void* os, uint16_t length_B){
|
||||
a->length_B = BIGINT_CEIL(length_B) / sizeof(bigint_word_t);
|
||||
a->wordv = malloc(BIGINT_CEIL(length_B));
|
||||
if(!a->wordv){
|
||||
cli_putstr("\r\nOOM!\r\n");
|
||||
return;
|
||||
return 1;
|
||||
}
|
||||
|
||||
m->length_B = (sizeof(modulus) + sizeof(bigint_word_t) - 1) / sizeof(bigint_word_t);
|
||||
epub->length_B = (sizeof(public_exponent) + sizeof(bigint_word_t) - 1) / sizeof(bigint_word_t);
|
||||
|
||||
m->wordv = malloc(m->length_B * sizeof(bigint_word_t));
|
||||
epub->wordv = malloc(epub->length_B * sizeof(bigint_word_t));
|
||||
|
||||
if(!m->wordv || !epub->wordv){
|
||||
cli_putstr("\r\nOOM!\r\n");
|
||||
return;
|
||||
}
|
||||
|
||||
memcpy(m->wordv, modulus, sizeof(modulus));
|
||||
memcpy(epub->wordv, public_exponent, sizeof(public_exponent));
|
||||
|
||||
pub_key.modulus = priv_key.modulus = m;
|
||||
pub_key.exponent = epub;
|
||||
|
||||
bigint_changeendianess(m);
|
||||
bigint_adjust(m);
|
||||
bigint_changeendianess(epub);
|
||||
bigint_adjust(epub);
|
||||
|
||||
// load_priv_conventional();
|
||||
load_priv_crt_mono();
|
||||
memset(a->wordv, 0, sizeof(bigint_word_t));
|
||||
memcpy((uint8_t*)a->wordv + BIGINT_OFF(length_B), os, length_B);
|
||||
a->info = 0;
|
||||
bigint_changeendianess(a);
|
||||
bigint_adjust(a);
|
||||
return 0;
|
||||
}
|
||||
|
||||
void load_fix_rsa(void){
|
||||
if(keys_allocated){
|
||||
free_key();
|
||||
}
|
||||
keys_allocated = 1;
|
||||
|
||||
#define MSG message2
|
||||
#define SEED seed2
|
||||
#define ENCRYPTED encrypted2
|
||||
if(pre_alloc_key_crt()){
|
||||
cli_putstr("\r\nOOM!\r\n");
|
||||
return;
|
||||
}
|
||||
|
||||
load_bigint_from_os(pub_key.modulus, MODULUS, sizeof(MODULUS));
|
||||
load_bigint_from_os(pub_key.exponent, PUB_EXPONENT, sizeof(PUB_EXPONENT));
|
||||
priv_key.n = 5;
|
||||
load_bigint_from_os(priv_key.components[0], P, sizeof(P));
|
||||
load_bigint_from_os(priv_key.components[1], Q, sizeof(Q));
|
||||
load_bigint_from_os(priv_key.components[2], DP, sizeof(DP));
|
||||
load_bigint_from_os(priv_key.components[3], DQ, sizeof(DQ));
|
||||
load_bigint_from_os(priv_key.components[4], QINV, sizeof(QINV));
|
||||
|
||||
// load_priv_conventional();
|
||||
// load_priv_crt_mono();
|
||||
}
|
||||
|
||||
void quick_test(void){
|
||||
uint8_t *ciphertext, *plaintext, rc;
|
||||
|
|
@ -304,6 +622,59 @@ void quick_test(void){
|
|||
free(plaintext);
|
||||
}
|
||||
|
||||
void run_seed_test(void){
|
||||
uint8_t *msg, *ciph, *msg_;
|
||||
uint16_t msg_len, ciph_len, msg_len_;
|
||||
uint8_t seed[20], seed_out[20];
|
||||
char read_int_str[18];
|
||||
cli_putstr("\r\n== test with given seed ==");
|
||||
cli_putstr("\r\n = message =");
|
||||
cli_putstr("\r\n length: ");
|
||||
cli_getsn(read_int_str, 16);
|
||||
msg_len = own_atou(read_int_str);
|
||||
msg = malloc(msg_len);
|
||||
if(!msg){
|
||||
cli_putstr("\r\nERROR: OOM!");
|
||||
return;
|
||||
}
|
||||
ciph = malloc(bigint_length_B(pub_key.modulus));
|
||||
if(!ciph){
|
||||
cli_putstr("\r\nERROR: OOM!");
|
||||
return;
|
||||
}
|
||||
msg_ = malloc(bigint_length_B(pub_key.modulus));
|
||||
if(!msg_){
|
||||
cli_putstr("\r\nERROR: OOM!");
|
||||
return;
|
||||
}
|
||||
cli_putstr("\r\n data: ");
|
||||
read_os(msg, msg_len, NULL);
|
||||
cli_putstr("\r\n seed (20 bytes): ");
|
||||
read_os(seed, 20, NULL);
|
||||
|
||||
cli_putstr("\r\n encrypting ...");
|
||||
rsa_encrypt_oaep(ciph, &ciph_len, msg, msg_len, &pub_key, NULL, NULL, seed);
|
||||
cli_putstr("\r\n ciphertext:");
|
||||
cli_hexdump_block(ciph, ciph_len, 4, 16);
|
||||
cli_putstr("\r\n decrypting ...");
|
||||
uart_flush(0);
|
||||
rsa_decrypt_oaep(msg_, &msg_len_, ciph, ciph_len, &priv_key, NULL, NULL, seed_out);
|
||||
if(msg_len != msg_len_){
|
||||
cli_putstr("\r\nERROR: wrong decryted message length");
|
||||
return;
|
||||
}
|
||||
if(memcmp(msg, msg_, msg_len)){
|
||||
cli_putstr("\r\nERROR: wrong decryted message");
|
||||
return;
|
||||
}
|
||||
|
||||
if(memcmp(seed, seed_out, 20)){
|
||||
cli_putstr("\r\nERROR: wrong decryted seed");
|
||||
return;
|
||||
}
|
||||
cli_putstr("\r\n >>OK<<");
|
||||
}
|
||||
|
||||
void reset_prng(void){
|
||||
uint8_t buf[16];
|
||||
memset(buf, 0, 16);
|
||||
|
|
@ -312,23 +683,36 @@ void reset_prng(void){
|
|||
}
|
||||
|
||||
void rsa_init(void){
|
||||
load_fix_rsa();
|
||||
prng_get_byte = random8;
|
||||
}
|
||||
|
||||
void load_key(void){
|
||||
if(keys_allocated){
|
||||
free_key();
|
||||
}
|
||||
keys_allocated = 1;
|
||||
read_key_crt();
|
||||
}
|
||||
|
||||
/*****************************************************************************
|
||||
* main *
|
||||
*****************************************************************************/
|
||||
|
||||
const char echo_test_str[] = "echo-test";
|
||||
const char reset_prng_str[] = "reset-prng";
|
||||
const char load_key_str[] = "load-key";
|
||||
const char load_fix_key_str[] = "load-fix-key";
|
||||
const char quick_test_str[] = "quick-test";
|
||||
const char seed_test_str[] = "seed-test";
|
||||
const char performance_str[] = "performance";
|
||||
const char echo_str[] = "echo";
|
||||
|
||||
cmdlist_entry_t cmdlist[] = {
|
||||
{ reset_prng_str, NULL, reset_prng },
|
||||
{ load_key_str, NULL, load_key },
|
||||
{ load_fix_key_str, NULL, load_fix_rsa },
|
||||
{ quick_test_str, NULL, quick_test },
|
||||
{ seed_test_str, NULL, run_seed_test },
|
||||
// { performance_str, NULL, testrun_performance_bigint },
|
||||
{ echo_str, (void*)1, (void_fpt)echo_ctrl },
|
||||
{ NULL, NULL, NULL }
|
||||
|
|
|
|||
Loading…
Reference in New Issue