diff options
Diffstat (limited to 'chip/g/dcrypto/internal.h')
| -rw-r--r-- | chip/g/dcrypto/internal.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/chip/g/dcrypto/internal.h b/chip/g/dcrypto/internal.h index 3be8a406a7..8757ab5e86 100644 --- a/chip/g/dcrypto/internal.h +++ b/chip/g/dcrypto/internal.h @@ -12,6 +12,9 @@ #include "sha1.h" #include "sha256.h" +/* + * SHA. + */ #define CTRL_CTR_BIG_ENDIAN (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) #define CTRL_ENABLE 1 #define CTRL_ENCRYPT 1 @@ -79,4 +82,27 @@ void dcrypto_sha_update(struct HASH_CTX *unused, const uint8_t *data, uint32_t n); void dcrypto_sha_wait(enum sha_mode mode, uint32_t *digest); +/* + * BIGNUM. + */ +#define BN_BITS2 32 +#define BN_BYTES 4 + +struct BIGNUM { + uint32_t dmax; /* Size of d, in 32-bit words. */ + uint32_t *d; /* Word array, little endian format ... */ +}; + +void bn_init(struct BIGNUM *bn, void *buf, size_t len); +#define bn_size(b) ((b)->dmax * BN_BYTES) +int bn_check_topbit(const struct BIGNUM *N); +void bn_mont_modexp(struct BIGNUM *output, const struct BIGNUM *input, + const struct BIGNUM *exp, const struct BIGNUM *N); + +/* + * Utility functions. + */ +/* TODO(ngm): memset that doesn't get optimized out. */ +#define dcrypto_memset(p, b, len) memset((p), (b), (len)) + #endif /* ! __EC_CHIP_G_DCRYPTO_INTERNAL_H */ |