| #ifndef _RSA_H_ |
| #define _RSA_H_ |
| |
| #include <stdint.h> |
| |
| #define RSA_LEN 2048 |
| #define RSA_LIMBS ((RSA_LEN + 31)/ 32) |
| #define RSA_BYTES sizeof(uint32_t[RSA_LIMBS]) |
| |
| struct RsaState { |
| uint32_t tmpA[RSA_LIMBS * 2]; |
| uint32_t tmpB[RSA_LIMBS + 1]; |
| |
| #if defined(RSA_SUPPORT_PRIV_OP_LOWRAM) |
| uint32_t tmpC[RSA_LIMBS + 1]; |
| #elif defined (RSA_SUPPORT_PRIV_OP_BIGRAM) |
| uint32_t tmpC[RSA_LIMBS * 2]; |
| #endif |
| }; |
| |
| //calculate a ^ 65537 mod c, where a and c are each exactly RSA_LEN bits long, result is only valid as long as state is. state needs no init |
| const uint32_t* rsaPubOp(struct RsaState* state, const uint32_t *a, const uint32_t *c); |
| |
| #if defined(RSA_SUPPORT_PRIV_OP_LOWRAM) || defined (RSA_SUPPORT_PRIV_OP_BIGRAM) |
| //calculate a ^ b mod c, where a and c are each exactly RSA_LEN bits long, result is only valid as long as state is. state needs no init |
| const uint32_t* rsaPrivOp(struct RsaState* state, const uint32_t *a, const uint32_t *b, const uint32_t *c); |
| |
| #ifdef ARM |
| #error "RSA private ops should never be compiled into firmware. You *ARE* doing something wrong! Stop!" |
| #endif |
| |
| #endif |
| |
| #endif |
| |
