diff options
Diffstat (limited to 'include/crypto/internal/ecc.h')
| -rw-r--r-- | include/crypto/internal/ecc.h | 35 |
1 files changed, 32 insertions, 3 deletions
diff --git a/include/crypto/internal/ecc.h b/include/crypto/internal/ecc.h index 4f6c1a68882f..57cd75242141 100644 --- a/include/crypto/internal/ecc.h +++ b/include/crypto/internal/ecc.h @@ -27,13 +27,14 @@ #define _CRYPTO_ECC_H #include <crypto/ecc_curve.h> -#include <asm/unaligned.h> +#include <linux/unaligned.h> /* One digit is u64 qword. */ #define ECC_CURVE_NIST_P192_DIGITS 3 #define ECC_CURVE_NIST_P256_DIGITS 4 #define ECC_CURVE_NIST_P384_DIGITS 6 -#define ECC_MAX_DIGITS (512 / 64) /* due to ecrdsa */ +#define ECC_CURVE_NIST_P521_DIGITS 9 +#define ECC_MAX_DIGITS DIV_ROUND_UP(521, 64) /* NIST P521 */ #define ECC_DIGITS_TO_BYTES_SHIFT 3 @@ -41,6 +42,18 @@ #define ECC_POINT_INIT(x, y, ndigits) (struct ecc_point) { x, y, ndigits } +/* + * The integers r and s making up the signature are expected to be + * formatted as two consecutive u64 arrays of size ECC_MAX_BYTES. + * The bytes within each u64 digit are in native endianness, + * but the order of the u64 digits themselves is little endian. + * This format allows direct use by internal vli_*() functions. + */ +struct ecdsa_raw_sig { + u64 r[ECC_MAX_DIGITS]; + u64 s[ECC_MAX_DIGITS]; +}; + /** * ecc_swap_digits() - Copy ndigits from big endian array to native array * @in: Input array @@ -57,6 +70,19 @@ static inline void ecc_swap_digits(const void *in, u64 *out, unsigned int ndigit } /** + * ecc_digits_from_bytes() - Create ndigits-sized digits array from byte array + * @in: Input byte array + * @nbytes Size of input byte array + * @out Output digits array + * @ndigits: Number of digits to create from byte array + * + * The first byte in the input byte array is expected to hold the most + * significant bits of the large integer. + */ +void ecc_digits_from_bytes(const u8 *in, unsigned int nbytes, + u64 *out, unsigned int ndigits); + +/** * ecc_is_key_valid() - Validate a given ECDH private key * * @curve_id: id representing the curve to use @@ -81,7 +107,8 @@ int ecc_is_key_valid(unsigned int curve_id, unsigned int ndigits, * Returns 0 if the private key was generated successfully, a negative value * if an error occurred. */ -int ecc_gen_privkey(unsigned int curve_id, unsigned int ndigits, u64 *privkey); +int ecc_gen_privkey(unsigned int curve_id, unsigned int ndigits, + u64 *private_key); /** * ecc_make_pub_key() - Compute an ECC public key @@ -278,4 +305,6 @@ void ecc_point_mult_shamir(const struct ecc_point *result, const u64 *y, const struct ecc_point *q, const struct ecc_curve *curve); +extern struct crypto_template ecdsa_x962_tmpl; +extern struct crypto_template ecdsa_p1363_tmpl; #endif |