/*
- * WPA Supplicant / wrapper functions for crypto libraries
- * Copyright (c) 2004-2009, Jouni Malinen <j@w1.fi>
+ * Wrapper functions for crypto libraries
+ * Copyright (c) 2004-2013, Jouni Malinen <j@w1.fi>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Alternatively, this software may be distributed under the terms of BSD
- * license.
- *
- * See README and COPYING for more details.
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
*
* This file defines the cryptographic functions that need to be implemented
* for wpa_supplicant and hostapd. When TLS is not used, internal
*/
int md5_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac);
-#ifdef CONFIG_FIPS
-/**
- * md5_vector_non_fips_allow - MD5 hash for data vector (non-FIPS use allowed)
- * @num_elem: Number of elements in the data vector
- * @addr: Pointers to the data areas
- * @len: Lengths of the data blocks
- * @mac: Buffer for the hash
- * Returns: 0 on success, -1 on failure
- */
-int md5_vector_non_fips_allow(size_t num_elem, const u8 *addr[],
- const size_t *len, u8 *mac);
-#else /* CONFIG_FIPS */
-#define md5_vector_non_fips_allow md5_vector
-#endif /* CONFIG_FIPS */
-
/**
* sha1_vector - SHA-1 hash for data vector
enum crypto_hash_alg {
CRYPTO_HASH_ALG_MD5, CRYPTO_HASH_ALG_SHA1,
- CRYPTO_HASH_ALG_HMAC_MD5, CRYPTO_HASH_ALG_HMAC_SHA1
+ CRYPTO_HASH_ALG_HMAC_MD5, CRYPTO_HASH_ALG_HMAC_SHA1,
+ CRYPTO_HASH_ALG_SHA256, CRYPTO_HASH_ALG_HMAC_SHA256
};
struct crypto_hash;
*/
struct crypto_public_key * crypto_public_key_import(const u8 *key, size_t len);
+struct crypto_public_key *
+crypto_public_key_import_parts(const u8 *n, size_t n_len,
+ const u8 *e, size_t e_len);
+
/**
* crypto_private_key_import - Import an RSA private key
* @key: Key buffer (DER encoded RSA private key)
int rc4_skip(const u8 *key, size_t keylen, size_t skip,
u8 *data, size_t data_len);
+/**
+ * crypto_get_random - Generate cryptographically strong pseudy-random bytes
+ * @buf: Buffer for data
+ * @len: Number of bytes to generate
+ * Returns: 0 on success, -1 on failure
+ *
+ * If the PRNG does not have enough entropy to ensure unpredictable byte
+ * sequence, this functions must return -1.
+ */
+int crypto_get_random(void *buf, size_t len);
+
+
+/**
+ * struct crypto_bignum - bignum
+ *
+ * Internal data structure for bignum implementation. The contents is specific
+ * to the used crypto library.
+ */
+struct crypto_bignum;
+
+/**
+ * crypto_bignum_init - Allocate memory for bignum
+ * Returns: Pointer to allocated bignum or %NULL on failure
+ */
+struct crypto_bignum * crypto_bignum_init(void);
+
+/**
+ * crypto_bignum_init_set - Allocate memory for bignum and set the value
+ * @buf: Buffer with unsigned binary value
+ * @len: Length of buf in octets
+ * Returns: Pointer to allocated bignum or %NULL on failure
+ */
+struct crypto_bignum * crypto_bignum_init_set(const u8 *buf, size_t len);
+
+/**
+ * crypto_bignum_deinit - Free bignum
+ * @n: Bignum from crypto_bignum_init() or crypto_bignum_init_set()
+ * @clear: Whether to clear the value from memory
+ */
+void crypto_bignum_deinit(struct crypto_bignum *n, int clear);
+
+/**
+ * crypto_bignum_to_bin - Set binary buffer to unsigned bignum
+ * @a: Bignum
+ * @buf: Buffer for the binary number
+ * @len: Length of @buf in octets
+ * @padlen: Length in octets to pad the result to or 0 to indicate no padding
+ * Returns: Number of octets written on success, -1 on failure
+ */
+int crypto_bignum_to_bin(const struct crypto_bignum *a,
+ u8 *buf, size_t buflen, size_t padlen);
+
+/**
+ * crypto_bignum_add - c = a + b
+ * @a: Bignum
+ * @b: Bignum
+ * @c: Bignum; used to store the result of a + b
+ * Returns: 0 on success, -1 on failure
+ */
+int crypto_bignum_add(const struct crypto_bignum *a,
+ const struct crypto_bignum *b,
+ struct crypto_bignum *c);
+
+/**
+ * crypto_bignum_mod - c = a % b
+ * @a: Bignum
+ * @b: Bignum
+ * @c: Bignum; used to store the result of a % b
+ * Returns: 0 on success, -1 on failure
+ */
+int crypto_bignum_mod(const struct crypto_bignum *a,
+ const struct crypto_bignum *b,
+ struct crypto_bignum *c);
+
+/**
+ * crypto_bignum_exptmod - Modular exponentiation: d = a^b (mod c)
+ * @a: Bignum; base
+ * @b: Bignum; exponent
+ * @c: Bignum; modulus
+ * @d: Bignum; used to store the result of a^b (mod c)
+ * Returns: 0 on success, -1 on failure
+ */
+int crypto_bignum_exptmod(const struct crypto_bignum *a,
+ const struct crypto_bignum *b,
+ const struct crypto_bignum *c,
+ struct crypto_bignum *d);
+
+/**
+ * crypto_bignum_inverse - Inverse a bignum so that a * c = 1 (mod b)
+ * @a: Bignum
+ * @b: Bignum
+ * @c: Bignum; used to store the result
+ * Returns: 0 on success, -1 on failure
+ */
+int crypto_bignum_inverse(const struct crypto_bignum *a,
+ const struct crypto_bignum *b,
+ struct crypto_bignum *c);
+
+/**
+ * crypto_bignum_sub - c = a - b
+ * @a: Bignum
+ * @b: Bignum
+ * @c: Bignum; used to store the result of a - b
+ * Returns: 0 on success, -1 on failure
+ */
+int crypto_bignum_sub(const struct crypto_bignum *a,
+ const struct crypto_bignum *b,
+ struct crypto_bignum *c);
+
+/**
+ * crypto_bignum_div - c = a / b
+ * @a: Bignum
+ * @b: Bignum
+ * @c: Bignum; used to store the result of a / b
+ * Returns: 0 on success, -1 on failure
+ */
+int crypto_bignum_div(const struct crypto_bignum *a,
+ const struct crypto_bignum *b,
+ struct crypto_bignum *c);
+
+/**
+ * crypto_bignum_mulmod - d = a * b (mod c)
+ * @a: Bignum
+ * @b: Bignum
+ * @c: Bignum
+ * @d: Bignum; used to store the result of (a * b) % c
+ * Returns: 0 on success, -1 on failure
+ */
+int crypto_bignum_mulmod(const struct crypto_bignum *a,
+ const struct crypto_bignum *b,
+ const struct crypto_bignum *c,
+ struct crypto_bignum *d);
+
+/**
+ * crypto_bignum_cmp - Compare two bignums
+ * @a: Bignum
+ * @b: Bignum
+ * Returns: -1 if a < b, 0 if a == b, or 1 if a > b
+ */
+int crypto_bignum_cmp(const struct crypto_bignum *a,
+ const struct crypto_bignum *b);
+
+/**
+ * crypto_bignum_bits - Get size of a bignum in bits
+ * @a: Bignum
+ * Returns: Number of bits in the bignum
+ */
+int crypto_bignum_bits(const struct crypto_bignum *a);
+
+/**
+ * crypto_bignum_is_zero - Is the given bignum zero
+ * @a: Bignum
+ * Returns: 1 if @a is zero or 0 if not
+ */
+int crypto_bignum_is_zero(const struct crypto_bignum *a);
+
+/**
+ * crypto_bignum_is_one - Is the given bignum one
+ * @a: Bignum
+ * Returns: 1 if @a is one or 0 if not
+ */
+int crypto_bignum_is_one(const struct crypto_bignum *a);
+
+/**
+ * crypto_bignum_legendre - Compute the Legendre symbol (a/p)
+ * @a: Bignum
+ * @p: Bignum
+ * Returns: Legendre symbol -1,0,1 on success; -2 on calculation failure
+ */
+int crypto_bignum_legendre(const struct crypto_bignum *a,
+ const struct crypto_bignum *p);
+
+/**
+ * struct crypto_ec - Elliptic curve context
+ *
+ * Internal data structure for EC implementation. The contents is specific
+ * to the used crypto library.
+ */
+struct crypto_ec;
+
+/**
+ * crypto_ec_init - Initialize elliptic curve context
+ * @group: Identifying number for the ECC group (IANA "Group Description"
+ * attribute registrty for RFC 2409)
+ * Returns: Pointer to EC context or %NULL on failure
+ */
+struct crypto_ec * crypto_ec_init(int group);
+
+/**
+ * crypto_ec_deinit - Deinitialize elliptic curve context
+ * @e: EC context from crypto_ec_init()
+ */
+void crypto_ec_deinit(struct crypto_ec *e);
+
+/**
+ * crypto_ec_prime_len - Get length of the prime in octets
+ * @e: EC context from crypto_ec_init()
+ * Returns: Length of the prime defining the group
+ */
+size_t crypto_ec_prime_len(struct crypto_ec *e);
+
+/**
+ * crypto_ec_prime_len_bits - Get length of the prime in bits
+ * @e: EC context from crypto_ec_init()
+ * Returns: Length of the prime defining the group in bits
+ */
+size_t crypto_ec_prime_len_bits(struct crypto_ec *e);
+
+/**
+ * crypto_ec_get_prime - Get prime defining an EC group
+ * @e: EC context from crypto_ec_init()
+ * Returns: Prime (bignum) defining the group
+ */
+const struct crypto_bignum * crypto_ec_get_prime(struct crypto_ec *e);
+
+/**
+ * crypto_ec_get_order - Get order of an EC group
+ * @e: EC context from crypto_ec_init()
+ * Returns: Order (bignum) of the group
+ */
+const struct crypto_bignum * crypto_ec_get_order(struct crypto_ec *e);
+
+/**
+ * struct crypto_ec_point - Elliptic curve point
+ *
+ * Internal data structure for EC implementation to represent a point. The
+ * contents is specific to the used crypto library.
+ */
+struct crypto_ec_point;
+
+/**
+ * crypto_ec_point_init - Initialize data for an EC point
+ * @e: EC context from crypto_ec_init()
+ * Returns: Pointer to EC point data or %NULL on failure
+ */
+struct crypto_ec_point * crypto_ec_point_init(struct crypto_ec *e);
+
+/**
+ * crypto_ec_point_deinit - Deinitialize EC point data
+ * @p: EC point data from crypto_ec_point_init()
+ * @clear: Whether to clear the EC point value from memory
+ */
+void crypto_ec_point_deinit(struct crypto_ec_point *p, int clear);
+
+/**
+ * crypto_ec_point_to_bin - Write EC point value as binary data
+ * @e: EC context from crypto_ec_init()
+ * @p: EC point data from crypto_ec_point_init()
+ * @x: Buffer for writing the binary data for x coordinate or %NULL if not used
+ * @y: Buffer for writing the binary data for y coordinate or %NULL if not used
+ * Returns: 0 on success, -1 on failure
+ *
+ * This function can be used to write an EC point as binary data in a format
+ * that has the x and y coordinates in big endian byte order fields padded to
+ * the length of the prime defining the group.
+ */
+int crypto_ec_point_to_bin(struct crypto_ec *e,
+ const struct crypto_ec_point *point, u8 *x, u8 *y);
+
+/**
+ * crypto_ec_point_from_bin - Create EC point from binary data
+ * @e: EC context from crypto_ec_init()
+ * @val: Binary data to read the EC point from
+ * Returns: Pointer to EC point data or %NULL on failure
+ *
+ * This function readers x and y coordinates of the EC point from the provided
+ * buffer assuming the values are in big endian byte order with fields padded to
+ * the length of the prime defining the group.
+ */
+struct crypto_ec_point * crypto_ec_point_from_bin(struct crypto_ec *e,
+ const u8 *val);
+
+/**
+ * crypto_bignum_add - c = a + b
+ * @e: EC context from crypto_ec_init()
+ * @a: Bignum
+ * @b: Bignum
+ * @c: Bignum; used to store the result of a + b
+ * Returns: 0 on success, -1 on failure
+ */
+int crypto_ec_point_add(struct crypto_ec *e, const struct crypto_ec_point *a,
+ const struct crypto_ec_point *b,
+ struct crypto_ec_point *c);
+
+/**
+ * crypto_bignum_mul - res = b * p
+ * @e: EC context from crypto_ec_init()
+ * @p: EC point
+ * @b: Bignum
+ * @res: EC point; used to store the result of b * p
+ * Returns: 0 on success, -1 on failure
+ */
+int crypto_ec_point_mul(struct crypto_ec *e, const struct crypto_ec_point *p,
+ const struct crypto_bignum *b,
+ struct crypto_ec_point *res);
+
+/**
+ * crypto_ec_point_invert - Compute inverse of an EC point
+ * @e: EC context from crypto_ec_init()
+ * @p: EC point to invert (and result of the operation)
+ * Returns: 0 on success, -1 on failure
+ */
+int crypto_ec_point_invert(struct crypto_ec *e, struct crypto_ec_point *p);
+
+/**
+ * crypto_ec_point_solve_y_coord - Solve y coordinate for an x coordinate
+ * @e: EC context from crypto_ec_init()
+ * @p: EC point to use for the returning the result
+ * @x: x coordinate
+ * @y_bit: y-bit (0 or 1) for selecting the y value to use
+ * Returns: 0 on success, -1 on failure
+ */
+int crypto_ec_point_solve_y_coord(struct crypto_ec *e,
+ struct crypto_ec_point *p,
+ const struct crypto_bignum *x, int y_bit);
+
+/**
+ * crypto_ec_point_compute_y_sqr - Compute y^2 = x^3 + ax + b
+ * @e: EC context from crypto_ec_init()
+ * @x: x coordinate
+ * Returns: y^2 on success, %NULL failure
+ */
+struct crypto_bignum *
+crypto_ec_point_compute_y_sqr(struct crypto_ec *e,
+ const struct crypto_bignum *x);
+
+/**
+ * crypto_ec_point_is_at_infinity - Check whether EC point is neutral element
+ * @e: EC context from crypto_ec_init()
+ * @p: EC point
+ * Returns: 1 if the specified EC point is the neutral element of the group or
+ * 0 if not
+ */
+int crypto_ec_point_is_at_infinity(struct crypto_ec *e,
+ const struct crypto_ec_point *p);
+
+/**
+ * crypto_ec_point_is_on_curve - Check whether EC point is on curve
+ * @e: EC context from crypto_ec_init()
+ * @p: EC point
+ * Returns: 1 if the specified EC point is on the curve or 0 if not
+ */
+int crypto_ec_point_is_on_curve(struct crypto_ec *e,
+ const struct crypto_ec_point *p);
+
+/**
+ * crypto_ec_point_cmp - Compare two EC points
+ * @e: EC context from crypto_ec_init()
+ * @a: EC point
+ * @b: EC point
+ * Returns: 0 on equal, non-zero otherwise
+ */
+int crypto_ec_point_cmp(const struct crypto_ec *e,
+ const struct crypto_ec_point *a,
+ const struct crypto_ec_point *b);
+
#endif /* CRYPTO_H */
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