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Don't use fixed len for RSA computation

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This commit is contained in:
NIIBE Yutaka
2014-12-12 11:19:24 +09:00
parent f82206e7d5
commit 0d59d31230
3 changed files with 39 additions and 34 deletions
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14
src/gnuk.h
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@@ -144,13 +144,14 @@ extern int flash_write_binary (uint8_t file_id, const uint8_t *data, uint16_t le
extern uint8_t ch_certificate_start;
extern uint8_t random_bits_start;
#define KEY_CONTENT_LEN 256 /* p and q */
#define INITIAL_VECTOR_SIZE 16
#define DATA_ENCRYPTION_KEY_SIZE 16
#define MAX_PRVKEY_LEN 512 /* Maximum is the case for RSA 4096-bit. */
struct key_data {
uint8_t *key_addr; /* Pointer to encrypted data, and public */
uint8_t data[KEY_CONTENT_LEN]; /* decrypted data content */
const uint8_t *pubkey; /* Pointer to public key*/
uint8_t data[MAX_PRVKEY_LEN]; /* decrypted private key data content */
};
struct key_data_internal {
@@ -241,12 +242,11 @@ extern void put_binary (const char *s, int len);
#define DEBUG_BINARY(s,len)
#endif
extern int rsa_sign (const uint8_t *, uint8_t *, int, struct key_data *);
extern int rsa_sign (const uint8_t *, uint8_t *, int, struct key_data *, int);
extern uint8_t *modulus_calc (const uint8_t *, int);
extern int rsa_decrypt (const uint8_t *, uint8_t *, int, struct key_data *);
extern int rsa_verify (const uint8_t *pubkey, const uint8_t *hash,
const uint8_t *signature);
extern uint8_t *rsa_genkey (void);
extern int rsa_verify (const uint8_t *, int, const uint8_t *, const uint8_t *);
extern uint8_t *rsa_genkey (int);
extern int ecdsa_sign_p256r1 (const uint8_t *hash, uint8_t *output,
const uint8_t *key_data);