[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/app/hostapd-2.10/src/crypto/crypto.h b/ap/app/hostapd-2.10/src/crypto/crypto.h
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+/*
+ * Wrapper functions for crypto libraries
+ * Copyright (c) 2004-2017, Jouni Malinen <j@w1.fi>
+ *
+ * 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
+ * implementation of MD5, SHA1, and AES is used and no external libraries are
+ * required. When TLS is enabled (e.g., by enabling EAP-TLS or EAP-PEAP), the
+ * crypto library used by the TLS implementation is expected to be used for
+ * non-TLS needs, too, in order to save space by not implementing these
+ * functions twice.
+ *
+ * Wrapper code for using each crypto library is in its own file (crypto*.c)
+ * and one of these files is build and linked in to provide the functions
+ * defined here.
+ */
+
+#ifndef CRYPTO_H
+#define CRYPTO_H
+
+/**
+ * md4_vector - MD4 hash for data vector
+ * @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 md4_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac);
+
+/**
+ * md5_vector - MD5 hash for data vector
+ * @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(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac);
+
+
+/**
+ * sha1_vector - SHA-1 hash for data vector
+ * @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 sha1_vector(size_t num_elem, const u8 *addr[], const size_t *len,
+ u8 *mac);
+
+/**
+ * fips186_2-prf - NIST FIPS Publication 186-2 change notice 1 PRF
+ * @seed: Seed/key for the PRF
+ * @seed_len: Seed length in bytes
+ * @x: Buffer for PRF output
+ * @xlen: Output length in bytes
+ * Returns: 0 on success, -1 on failure
+ *
+ * This function implements random number generation specified in NIST FIPS
+ * Publication 186-2 for EAP-SIM. This PRF uses a function that is similar to
+ * SHA-1, but has different message padding.
+ */
+int __must_check fips186_2_prf(const u8 *seed, size_t seed_len, u8 *x,
+ size_t xlen);
+
+/**
+ * sha256_vector - SHA256 hash for data vector
+ * @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 sha256_vector(size_t num_elem, const u8 *addr[], const size_t *len,
+ u8 *mac);
+
+/**
+ * sha384_vector - SHA384 hash for data vector
+ * @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 sha384_vector(size_t num_elem, const u8 *addr[], const size_t *len,
+ u8 *mac);
+
+/**
+ * sha512_vector - SHA512 hash for data vector
+ * @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 sha512_vector(size_t num_elem, const u8 *addr[], const size_t *len,
+ u8 *mac);
+
+/**
+ * des_encrypt - Encrypt one block with DES
+ * @clear: 8 octets (in)
+ * @key: 7 octets (in) (no parity bits included)
+ * @cypher: 8 octets (out)
+ * Returns: 0 on success, -1 on failure
+ */
+int des_encrypt(const u8 *clear, const u8 *key, u8 *cypher);
+
+/**
+ * aes_encrypt_init - Initialize AES for encryption
+ * @key: Encryption key
+ * @len: Key length in bytes (usually 16, i.e., 128 bits)
+ * Returns: Pointer to context data or %NULL on failure
+ */
+void * aes_encrypt_init(const u8 *key, size_t len);
+
+/**
+ * aes_encrypt - Encrypt one AES block
+ * @ctx: Context pointer from aes_encrypt_init()
+ * @plain: Plaintext data to be encrypted (16 bytes)
+ * @crypt: Buffer for the encrypted data (16 bytes)
+ * Returns: 0 on success, -1 on failure
+ */
+int aes_encrypt(void *ctx, const u8 *plain, u8 *crypt);
+
+/**
+ * aes_encrypt_deinit - Deinitialize AES encryption
+ * @ctx: Context pointer from aes_encrypt_init()
+ */
+void aes_encrypt_deinit(void *ctx);
+
+/**
+ * aes_decrypt_init - Initialize AES for decryption
+ * @key: Decryption key
+ * @len: Key length in bytes (usually 16, i.e., 128 bits)
+ * Returns: Pointer to context data or %NULL on failure
+ */
+void * aes_decrypt_init(const u8 *key, size_t len);
+
+/**
+ * aes_decrypt - Decrypt one AES block
+ * @ctx: Context pointer from aes_encrypt_init()
+ * @crypt: Encrypted data (16 bytes)
+ * @plain: Buffer for the decrypted data (16 bytes)
+ * Returns: 0 on success, -1 on failure
+ */
+int aes_decrypt(void *ctx, const u8 *crypt, u8 *plain);
+
+/**
+ * aes_decrypt_deinit - Deinitialize AES decryption
+ * @ctx: Context pointer from aes_encrypt_init()
+ */
+void aes_decrypt_deinit(void *ctx);
+
+
+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_SHA256, CRYPTO_HASH_ALG_HMAC_SHA256,
+ CRYPTO_HASH_ALG_SHA384, CRYPTO_HASH_ALG_SHA512
+};
+
+struct crypto_hash;
+
+/**
+ * crypto_hash_init - Initialize hash/HMAC function
+ * @alg: Hash algorithm
+ * @key: Key for keyed hash (e.g., HMAC) or %NULL if not needed
+ * @key_len: Length of the key in bytes
+ * Returns: Pointer to hash context to use with other hash functions or %NULL
+ * on failure
+ *
+ * This function is only used with internal TLSv1 implementation
+ * (CONFIG_TLS=internal). If that is not used, the crypto wrapper does not need
+ * to implement this.
+ */
+struct crypto_hash * crypto_hash_init(enum crypto_hash_alg alg, const u8 *key,
+ size_t key_len);
+
+/**
+ * crypto_hash_update - Add data to hash calculation
+ * @ctx: Context pointer from crypto_hash_init()
+ * @data: Data buffer to add
+ * @len: Length of the buffer
+ *
+ * This function is only used with internal TLSv1 implementation
+ * (CONFIG_TLS=internal). If that is not used, the crypto wrapper does not need
+ * to implement this.
+ */
+void crypto_hash_update(struct crypto_hash *ctx, const u8 *data, size_t len);
+
+/**
+ * crypto_hash_finish - Complete hash calculation
+ * @ctx: Context pointer from crypto_hash_init()
+ * @hash: Buffer for hash value or %NULL if caller is just freeing the hash
+ * context
+ * @len: Pointer to length of the buffer or %NULL if caller is just freeing the
+ * hash context; on return, this is set to the actual length of the hash value
+ * Returns: 0 on success, -1 if buffer is too small (len set to needed length),
+ * or -2 on other failures (including failed crypto_hash_update() operations)
+ *
+ * This function calculates the hash value and frees the context buffer that
+ * was used for hash calculation.
+ *
+ * This function is only used with internal TLSv1 implementation
+ * (CONFIG_TLS=internal). If that is not used, the crypto wrapper does not need
+ * to implement this.
+ */
+int crypto_hash_finish(struct crypto_hash *ctx, u8 *hash, size_t *len);
+
+
+enum crypto_cipher_alg {
+ CRYPTO_CIPHER_NULL = 0, CRYPTO_CIPHER_ALG_AES, CRYPTO_CIPHER_ALG_3DES,
+ CRYPTO_CIPHER_ALG_DES, CRYPTO_CIPHER_ALG_RC2, CRYPTO_CIPHER_ALG_RC4
+};
+
+struct crypto_cipher;
+
+/**
+ * crypto_cipher_init - Initialize block/stream cipher function
+ * @alg: Cipher algorithm
+ * @iv: Initialization vector for block ciphers or %NULL for stream ciphers
+ * @key: Cipher key
+ * @key_len: Length of key in bytes
+ * Returns: Pointer to cipher context to use with other cipher functions or
+ * %NULL on failure
+ *
+ * This function is only used with internal TLSv1 implementation
+ * (CONFIG_TLS=internal). If that is not used, the crypto wrapper does not need
+ * to implement this.
+ */
+struct crypto_cipher * crypto_cipher_init(enum crypto_cipher_alg alg,
+ const u8 *iv, const u8 *key,
+ size_t key_len);
+
+/**
+ * crypto_cipher_encrypt - Cipher encrypt
+ * @ctx: Context pointer from crypto_cipher_init()
+ * @plain: Plaintext to cipher
+ * @crypt: Resulting ciphertext
+ * @len: Length of the plaintext
+ * Returns: 0 on success, -1 on failure
+ *
+ * This function is only used with internal TLSv1 implementation
+ * (CONFIG_TLS=internal). If that is not used, the crypto wrapper does not need
+ * to implement this.
+ */
+int __must_check crypto_cipher_encrypt(struct crypto_cipher *ctx,
+ const u8 *plain, u8 *crypt, size_t len);
+
+/**
+ * crypto_cipher_decrypt - Cipher decrypt
+ * @ctx: Context pointer from crypto_cipher_init()
+ * @crypt: Ciphertext to decrypt
+ * @plain: Resulting plaintext
+ * @len: Length of the cipher text
+ * Returns: 0 on success, -1 on failure
+ *
+ * This function is only used with internal TLSv1 implementation
+ * (CONFIG_TLS=internal). If that is not used, the crypto wrapper does not need
+ * to implement this.
+ */
+int __must_check crypto_cipher_decrypt(struct crypto_cipher *ctx,
+ const u8 *crypt, u8 *plain, size_t len);
+
+/**
+ * crypto_cipher_decrypt - Free cipher context
+ * @ctx: Context pointer from crypto_cipher_init()
+ *
+ * This function is only used with internal TLSv1 implementation
+ * (CONFIG_TLS=internal). If that is not used, the crypto wrapper does not need
+ * to implement this.
+ */
+void crypto_cipher_deinit(struct crypto_cipher *ctx);
+
+
+struct crypto_public_key;
+struct crypto_private_key;
+
+/**
+ * crypto_public_key_import - Import an RSA public key
+ * @key: Key buffer (DER encoded RSA public key)
+ * @len: Key buffer length in bytes
+ * Returns: Pointer to the public key or %NULL on failure
+ *
+ * This function can just return %NULL if the crypto library supports X.509
+ * parsing. In that case, crypto_public_key_from_cert() is used to import the
+ * public key from a certificate.
+ *
+ * This function is only used with internal TLSv1 implementation
+ * (CONFIG_TLS=internal). If that is not used, the crypto wrapper does not need
+ * to implement this.
+ */
+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)
+ * @len: Key buffer length in bytes
+ * @passwd: Key encryption password or %NULL if key is not encrypted
+ * Returns: Pointer to the private key or %NULL on failure
+ *
+ * This function is only used with internal TLSv1 implementation
+ * (CONFIG_TLS=internal). If that is not used, the crypto wrapper does not need
+ * to implement this.
+ */
+struct crypto_private_key * crypto_private_key_import(const u8 *key,
+ size_t len,
+ const char *passwd);
+
+/**
+ * crypto_public_key_from_cert - Import an RSA public key from a certificate
+ * @buf: DER encoded X.509 certificate
+ * @len: Certificate buffer length in bytes
+ * Returns: Pointer to public key or %NULL on failure
+ *
+ * This function can just return %NULL if the crypto library does not support
+ * X.509 parsing. In that case, internal code will be used to parse the
+ * certificate and public key is imported using crypto_public_key_import().
+ *
+ * This function is only used with internal TLSv1 implementation
+ * (CONFIG_TLS=internal). If that is not used, the crypto wrapper does not need
+ * to implement this.
+ */
+struct crypto_public_key * crypto_public_key_from_cert(const u8 *buf,
+ size_t len);
+
+/**
+ * crypto_public_key_encrypt_pkcs1_v15 - Public key encryption (PKCS #1 v1.5)
+ * @key: Public key
+ * @in: Plaintext buffer
+ * @inlen: Length of plaintext buffer in bytes
+ * @out: Output buffer for encrypted data
+ * @outlen: Length of output buffer in bytes; set to used length on success
+ * Returns: 0 on success, -1 on failure
+ *
+ * This function is only used with internal TLSv1 implementation
+ * (CONFIG_TLS=internal). If that is not used, the crypto wrapper does not need
+ * to implement this.
+ */
+int __must_check crypto_public_key_encrypt_pkcs1_v15(
+ struct crypto_public_key *key, const u8 *in, size_t inlen,
+ u8 *out, size_t *outlen);
+
+/**
+ * crypto_private_key_decrypt_pkcs1_v15 - Private key decryption (PKCS #1 v1.5)
+ * @key: Private key
+ * @in: Encrypted buffer
+ * @inlen: Length of encrypted buffer in bytes
+ * @out: Output buffer for encrypted data
+ * @outlen: Length of output buffer in bytes; set to used length on success
+ * Returns: 0 on success, -1 on failure
+ *
+ * This function is only used with internal TLSv1 implementation
+ * (CONFIG_TLS=internal). If that is not used, the crypto wrapper does not need
+ * to implement this.
+ */
+int __must_check crypto_private_key_decrypt_pkcs1_v15(
+ struct crypto_private_key *key, const u8 *in, size_t inlen,
+ u8 *out, size_t *outlen);
+
+/**
+ * crypto_private_key_sign_pkcs1 - Sign with private key (PKCS #1)
+ * @key: Private key from crypto_private_key_import()
+ * @in: Plaintext buffer
+ * @inlen: Length of plaintext buffer in bytes
+ * @out: Output buffer for encrypted (signed) data
+ * @outlen: Length of output buffer in bytes; set to used length on success
+ * Returns: 0 on success, -1 on failure
+ *
+ * This function is only used with internal TLSv1 implementation
+ * (CONFIG_TLS=internal). If that is not used, the crypto wrapper does not need
+ * to implement this.
+ */
+int __must_check crypto_private_key_sign_pkcs1(struct crypto_private_key *key,
+ const u8 *in, size_t inlen,
+ u8 *out, size_t *outlen);
+
+/**
+ * crypto_public_key_free - Free public key
+ * @key: Public key
+ *
+ * This function is only used with internal TLSv1 implementation
+ * (CONFIG_TLS=internal). If that is not used, the crypto wrapper does not need
+ * to implement this.
+ */
+void crypto_public_key_free(struct crypto_public_key *key);
+
+/**
+ * crypto_private_key_free - Free private key
+ * @key: Private key from crypto_private_key_import()
+ *
+ * This function is only used with internal TLSv1 implementation
+ * (CONFIG_TLS=internal). If that is not used, the crypto wrapper does not need
+ * to implement this.
+ */
+void crypto_private_key_free(struct crypto_private_key *key);
+
+/**
+ * crypto_public_key_decrypt_pkcs1 - Decrypt PKCS #1 signature
+ * @key: Public key
+ * @crypt: Encrypted signature data (using the private key)
+ * @crypt_len: Encrypted signature data length
+ * @plain: Buffer for plaintext (at least crypt_len bytes)
+ * @plain_len: Plaintext length (max buffer size on input, real len on output);
+ * Returns: 0 on success, -1 on failure
+ */
+int __must_check crypto_public_key_decrypt_pkcs1(
+ struct crypto_public_key *key, const u8 *crypt, size_t crypt_len,
+ u8 *plain, size_t *plain_len);
+
+int crypto_dh_init(u8 generator, const u8 *prime, size_t prime_len, u8 *privkey,
+ u8 *pubkey);
+int crypto_dh_derive_secret(u8 generator, const u8 *prime, size_t prime_len,
+ const u8 *order, size_t order_len,
+ const u8 *privkey, size_t privkey_len,
+ const u8 *pubkey, size_t pubkey_len,
+ u8 *secret, size_t *len);
+
+/**
+ * crypto_global_init - Initialize crypto wrapper
+ *
+ * This function is only used with internal TLSv1 implementation
+ * (CONFIG_TLS=internal). If that is not used, the crypto wrapper does not need
+ * to implement this.
+ */
+int __must_check crypto_global_init(void);
+
+/**
+ * crypto_global_deinit - Deinitialize crypto wrapper
+ *
+ * This function is only used with internal TLSv1 implementation
+ * (CONFIG_TLS=internal). If that is not used, the crypto wrapper does not need
+ * to implement this.
+ */
+void crypto_global_deinit(void);
+
+/**
+ * crypto_mod_exp - Modular exponentiation of large integers
+ * @base: Base integer (big endian byte array)
+ * @base_len: Length of base integer in bytes
+ * @power: Power integer (big endian byte array)
+ * @power_len: Length of power integer in bytes
+ * @modulus: Modulus integer (big endian byte array)
+ * @modulus_len: Length of modulus integer in bytes
+ * @result: Buffer for the result
+ * @result_len: Result length (max buffer size on input, real len on output)
+ * Returns: 0 on success, -1 on failure
+ *
+ * This function calculates result = base ^ power mod modulus. modules_len is
+ * used as the maximum size of modulus buffer. It is set to the used size on
+ * success.
+ *
+ * This function is only used with internal TLSv1 implementation
+ * (CONFIG_TLS=internal). If that is not used, the crypto wrapper does not need
+ * to implement this.
+ */
+int __must_check crypto_mod_exp(const u8 *base, size_t base_len,
+ const u8 *power, size_t power_len,
+ const u8 *modulus, size_t modulus_len,
+ u8 *result, size_t *result_len);
+
+/**
+ * rc4_skip - XOR RC4 stream to given data with skip-stream-start
+ * @key: RC4 key
+ * @keylen: RC4 key length
+ * @skip: number of bytes to skip from the beginning of the RC4 stream
+ * @data: data to be XOR'ed with RC4 stream
+ * @data_len: buf length
+ * Returns: 0 on success, -1 on failure
+ *
+ * Generate RC4 pseudo random stream for the given key, skip beginning of the
+ * stream, and XOR the end result with the data buffer to perform RC4
+ * encryption/decryption.
+ */
+int rc4_skip(const u8 *key, size_t keylen, size_t skip,
+ u8 *data, size_t data_len);
+
+/**
+ * crypto_get_random - Generate cryptographically strong pseudo-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);
+
+/**
+ * crypto_pkcs7_get_certificates - Extract X.509 certificates from PKCS#7 data
+ * @pkcs7: DER encoded PKCS#7 data
+ * Returns: Buffer of the extracted PEM X.509 certificates or %NULL on failure
+ */
+struct wpabuf * crypto_pkcs7_get_certificates(const struct wpabuf *pkcs7);
+
+
+/**
+ * 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_init_set - Allocate memory for bignum and set the value (uint)
+ * @val: Value to set
+ * Returns: Pointer to allocated bignum or %NULL on failure
+ */
+struct crypto_bignum * crypto_bignum_init_uint(unsigned int val);
+
+/**
+ * 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_rand - Create a random number in range of modulus
+ * @r: Bignum; set to a random value
+ * @m: Bignum; modulus
+ * Returns: 0 on success, -1 on failure
+ */
+int crypto_bignum_rand(struct crypto_bignum *r, const struct crypto_bignum *m);
+
+/**
+ * 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_addmod - 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_addmod(const struct crypto_bignum *a,
+ const struct crypto_bignum *b,
+ const struct crypto_bignum *c,
+ struct crypto_bignum *d);
+
+/**
+ * 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_sqrmod - c = a^2 (mod b)
+ * @a: Bignum
+ * @b: Bignum
+ * @c: Bignum; used to store the result of a^2 % b
+ * Returns: 0 on success, -1 on failure
+ */
+int crypto_bignum_sqrmod(const struct crypto_bignum *a,
+ const struct crypto_bignum *b,
+ struct crypto_bignum *c);
+
+/**
+ * crypto_bignum_rshift - r = a >> n
+ * @a: Bignum
+ * @n: Number of bits
+ * @r: Bignum; used to store the result of a >> n
+ * Returns: 0 on success, -1 on failure
+ */
+int crypto_bignum_rshift(const struct crypto_bignum *a, int n,
+ struct crypto_bignum *r);
+
+/**
+ * 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_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_is_odd - Is the given bignum odd
+ * @a: Bignum
+ * Returns: 1 if @a is odd or 0 if not
+ */
+int crypto_bignum_is_odd(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;
+
+/**
+ * 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_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_order_len - Get length of the order in octets
+ * @e: EC context from crypto_ec_init()
+ * Returns: Length of the order defining the group
+ */
+size_t crypto_ec_order_len(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);
+
+/**
+ * crypto_ec_get_a - Get 'a' coefficient of an EC group's curve
+ * @e: EC context from crypto_ec_init()
+ * Returns: 'a' coefficient (bignum) of the group
+ */
+const struct crypto_bignum * crypto_ec_get_a(struct crypto_ec *e);
+
+/**
+ * crypto_ec_get_b - Get 'b' coeffiecient of an EC group's curve
+ * @e: EC context from crypto_ec_init()
+ * Returns: 'b' coefficient (bignum) of the group
+ */
+const struct crypto_bignum * crypto_ec_get_b(struct crypto_ec *e);
+
+/**
+ * crypto_ec_get_generator - Get generator point of the EC group's curve
+ * @e: EC context from crypto_ec_init()
+ * Returns: Pointer to generator point
+ */
+const struct crypto_ec_point * crypto_ec_get_generator(struct crypto_ec *e);
+
+/**
+ * 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_x - Copies the x-ordinate point into big number
+ * @e: EC context from crypto_ec_init()
+ * @p: EC point data
+ * @x: Big number to set to the copy of x-ordinate
+ * Returns: 0 on success, -1 on failure
+ */
+int crypto_ec_point_x(struct crypto_ec *e, const struct crypto_ec_point *p,
+ struct crypto_bignum *x);
+
+/**
+ * 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_ec_point_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_ec_point_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_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);
+
+/**
+ * crypto_ec_point_debug_print - Dump EC point to debug log
+ * @e: EC context from crypto_ec_init()
+ * @p: EC point
+ * @title: Name of the EC point in the trace
+ */
+void crypto_ec_point_debug_print(const struct crypto_ec *e,
+ const struct crypto_ec_point *p,
+ const char *title);
+
+/**
+ * struct crypto_ec_key - Elliptic curve key pair
+ *
+ * Internal data structure for EC key pair. The contents is specific to the used
+ * crypto library.
+ */
+struct crypto_ec_key;
+
+/**
+ * struct crypto_ecdh - Elliptic Curve Diffie–Hellman context
+ *
+ * Internal data structure for ECDH. The contents is specific to the used
+ * crypto library.
+ */
+struct crypto_ecdh;
+
+/**
+ * crypto_ecdh_init - Initialize elliptic curve Diffie–Hellman context
+ * @group: Identifying number for the ECC group (IANA "Group Description"
+ * attribute registry for RFC 2409)
+ * This function generates an ephemeral key pair.
+ * Returns: Pointer to ECDH context or %NULL on failure
+ */
+struct crypto_ecdh * crypto_ecdh_init(int group);
+
+/**
+ * crypto_ecdh_init2 - Initialize elliptic curve Diffie–Hellman context with a
+ * given EC key
+ * @group: Identifying number for the ECC group (IANA "Group Description"
+ * attribute registry for RFC 2409)
+ * @own_key: Our own EC Key
+ * Returns: Pointer to ECDH context or %NULL on failure
+ */
+struct crypto_ecdh * crypto_ecdh_init2(int group,
+ struct crypto_ec_key *own_key);
+
+/**
+ * crypto_ecdh_get_pubkey - Retrieve public key from ECDH context
+ * @ecdh: ECDH context from crypto_ecdh_init() or crypto_ecdh_init2()
+ * @inc_y: Whether public key should include y coordinate (explicit form)
+ * or not (compressed form)
+ * Returns: Binary data f the public key or %NULL on failure
+ */
+struct wpabuf * crypto_ecdh_get_pubkey(struct crypto_ecdh *ecdh, int inc_y);
+
+/**
+ * crypto_ecdh_set_peerkey - Compute ECDH secret
+ * @ecdh: ECDH context from crypto_ecdh_init() or crypto_ecdh_init2()
+ * @inc_y: Whether peer's public key includes y coordinate (explicit form)
+ * or not (compressed form)
+ * @key: Binary data of the peer's public key
+ * @len: Length of the @key buffer
+ * Returns: Binary data with the EDCH secret or %NULL on failure
+ */
+struct wpabuf * crypto_ecdh_set_peerkey(struct crypto_ecdh *ecdh, int inc_y,
+ const u8 *key, size_t len);
+
+/**
+ * crypto_ecdh_deinit - Free ECDH context
+ * @ecdh: ECDH context from crypto_ecdh_init() or crypto_ecdh_init2()
+ */
+void crypto_ecdh_deinit(struct crypto_ecdh *ecdh);
+
+/**
+ * crypto_ecdh_prime_len - Get length of the prime in octets
+ * @e: ECDH context from crypto_ecdh_init()
+ * Returns: Length of the prime defining the group
+ */
+size_t crypto_ecdh_prime_len(struct crypto_ecdh *ecdh);
+
+/**
+ * crypto_ec_key_parse_priv - Initialize EC key pair from ECPrivateKey ASN.1
+ * @der: DER encoding of ASN.1 ECPrivateKey
+ * @der_len: Length of @der buffer
+ * Returns: EC key or %NULL on failure
+ */
+struct crypto_ec_key * crypto_ec_key_parse_priv(const u8 *der, size_t der_len);
+
+/**
+ * crypto_ec_key_parse_pub - Initialize EC key pair from SubjectPublicKeyInfo ASN.1
+ * @der: DER encoding of ASN.1 SubjectPublicKeyInfo
+ * @der_len: Length of @der buffer
+ * Returns: EC key or %NULL on failure
+ */
+struct crypto_ec_key * crypto_ec_key_parse_pub(const u8 *der, size_t der_len);
+
+/**
+ * crypto_ec_key_set_pub - Initialize an EC public key from EC point coordinates
+ * @group: Identifying number for the ECC group
+ * @x: X coordinate of the public key
+ * @y: Y coordinate of the public key
+ * @len: Length of @x and @y buffer
+ * Returns: EC key or %NULL on failure
+ *
+ * This function initialize an EC key from public key coordinates, in big endian
+ * byte order padded to the length of the prime defining the group.
+ */
+struct crypto_ec_key * crypto_ec_key_set_pub(int group, const u8 *x,
+ const u8 *y, size_t len);
+
+/**
+ * crypto_ec_key_set_pub_point - Initialize an EC public key from EC point
+ * @e: EC context from crypto_ec_init()
+ * @pub: Public key point
+ * Returns: EC key or %NULL on failure
+ */
+struct crypto_ec_key *
+crypto_ec_key_set_pub_point(struct crypto_ec *e,
+ const struct crypto_ec_point *pub);
+
+/**
+ * crypto_ec_key_gen - Generate EC key pair
+ * @group: Identifying number for the ECC group
+ * Returns: EC key or %NULL on failure
+ */
+struct crypto_ec_key * crypto_ec_key_gen(int group);
+
+/**
+ * crypto_ec_key_deinit - Free EC key
+ * @key: EC key from crypto_ec_key_parse_pub/priv() or crypto_ec_key_gen()
+ */
+void crypto_ec_key_deinit(struct crypto_ec_key *key);
+
+/**
+ * crypto_ec_key_get_subject_public_key - Get SubjectPublicKeyInfo ASN.1 for an EC key
+ * @key: EC key from crypto_ec_key_parse/set_pub/priv() or crypto_ec_key_gen()
+ * Returns: Buffer with DER encoding of ASN.1 SubjectPublicKeyInfo or %NULL on failure
+ */
+struct wpabuf * crypto_ec_key_get_subject_public_key(struct crypto_ec_key *key);
+
+/**
+ * crypto_ec_key_get_ecprivate_key - Get ECPrivateKey ASN.1 for a EC key
+ * @key: EC key from crypto_ec_key_parse_priv() or crypto_ec_key_gen()
+ * @include_pub: Whether to include public key in the ASN.1 sequence
+ * Returns: Buffer with DER encoding of ASN.1 ECPrivateKey or %NULL on failure
+ */
+struct wpabuf * crypto_ec_key_get_ecprivate_key(struct crypto_ec_key *key,
+ bool include_pub);
+
+/**
+ * crypto_ec_key_get_pubkey_point - Get public key point coordinates
+ * @key: EC key from crypto_ec_key_parse/set_pub() or crypto_ec_key_parse_priv()
+ * @prefix: Whether output buffer should include the octet to indicate
+ * coordinate form (as defined for SubjectPublicKeyInfo)
+ * Returns: Buffer with coordinates of public key in uncompressed form or %NULL
+ * on failure
+ */
+struct wpabuf * crypto_ec_key_get_pubkey_point(struct crypto_ec_key *key,
+ int prefix);
+
+/**
+ * crypto_ec_key_get_public_key - Get EC public key as an EC point
+ * @key: EC key from crypto_ec_key_parse/set_pub() or crypto_ec_key_parse_priv()
+ * Returns: Public key as an EC point or %NULL on failure
+ */
+const struct crypto_ec_point *
+crypto_ec_key_get_public_key(struct crypto_ec_key *key);
+
+/**
+ * crypto_ec_key_get_private_key - Get EC private key as a bignum
+ * @key: EC key from crypto_ec_key_parse/set_pub() or crypto_ec_key_parse_priv()
+ * Returns: Private key as a bignum or %NULL on failure
+ */
+const struct crypto_bignum *
+crypto_ec_key_get_private_key(struct crypto_ec_key *key);
+
+/**
+ * crypto_ec_key_sign - Sign a buffer with an EC key
+ * @key: EC key from crypto_ec_key_parse_priv() or crypto_ec_key_gen()
+ * @data: Data to sign
+ * @len: Length of @data buffer
+ * Returns: Buffer with DER encoding of ASN.1 Ecdsa-Sig-Value or %NULL on failure
+ */
+struct wpabuf * crypto_ec_key_sign(struct crypto_ec_key *key, const u8 *data,
+ size_t len);
+
+/**
+ * crypto_ec_key_sign_r_s - Sign a buffer with an EC key
+ * @key: EC key from crypto_ec_key_parse_priv() or crypto_ec_key_gen()
+ * @data: Data to sign
+ * @len: Length of @data buffer
+ * Returns: Buffer with the concatenated r and s values. Each value is in big
+ * endian byte order padded to the length of the prime defining the group of
+ * the key.
+ */
+struct wpabuf * crypto_ec_key_sign_r_s(struct crypto_ec_key *key,
+ const u8 *data, size_t len);
+
+/**
+ * crypto_ec_key_verify_signature - Verify ECDSA signature
+ * @key: EC key from crypto_ec_key_parse/set_pub() or crypto_ec_key_gen()
+ * @data: Data to be signed
+ * @len: Length of @data buffer
+ * @sig: DER encoding of ASN.1 Ecdsa-Sig-Value
+ * @sig_len: Length of @sig buffer
+ * Returns: 1 if signature is valid, 0 if signature is invalid and -1 on failure
+ */
+int crypto_ec_key_verify_signature(struct crypto_ec_key *key, const u8 *data,
+ size_t len, const u8 *sig, size_t sig_len);
+
+/**
+ * crypto_ec_key_verify_signature_r_s - Verify signature
+ * @key: EC key from crypto_ec_key_parse/set_pub() or crypto_ec_key_gen()
+ * @data: Data to signed
+ * @len: Length of @data buffer
+ * @r: Binary data, in big endian byte order, of the 'r' field of the ECDSA
+ * signature.
+ * @s: Binary data, in big endian byte order, of the 's' field of the ECDSA
+ * signature.
+ * @r_len: Length of @r buffer
+ * @s_len: Length of @s buffer
+ * Returns: 1 if signature is valid, 0 if signature is invalid, or -1 on failure
+ */
+int crypto_ec_key_verify_signature_r_s(struct crypto_ec_key *key,
+ const u8 *data, size_t len,
+ const u8 *r, size_t r_len,
+ const u8 *s, size_t s_len);
+
+/**
+ * crypto_ec_key_group - Get IANA group identifier for an EC key
+ * @key: EC key from crypto_ec_key_parse/set_pub/priv() or crypto_ec_key_gen()
+ * Returns: IANA group identifier and -1 on failure
+ */
+int crypto_ec_key_group(struct crypto_ec_key *key);
+
+/**
+ * crypto_ec_key_cmp - Compare two EC public keys
+ * @key1: Key 1
+ * @key2: Key 2
+ * Returns: 0 if public keys are identical, -1 otherwise
+ */
+int crypto_ec_key_cmp(struct crypto_ec_key *key1, struct crypto_ec_key *key2);
+
+/**
+ * crypto_ec_key_debug_print - Dump EC key to debug log
+ * @key: EC key from crypto_ec_key_parse/set_pub/priv() or crypto_ec_key_gen()
+ * @title: Name of the EC point in the trace
+ */
+void crypto_ec_key_debug_print(const struct crypto_ec_key *key,
+ const char *title);
+
+/**
+ * struct crypto_csr - Certification Signing Request
+ *
+ * Internal data structure for CSR. The contents is specific to the used
+ * crypto library.
+ * For now it is assumed that only an EC public key can be used
+ */
+struct crypto_csr;
+
+/**
+ * enum crypto_csr_name - CSR name type
+ */
+enum crypto_csr_name {
+ CSR_NAME_CN,
+ CSR_NAME_SN,
+ CSR_NAME_C,
+ CSR_NAME_O,
+ CSR_NAME_OU,
+};
+
+/**
+ * enum crypto_csr_attr - CSR attribute
+ */
+enum crypto_csr_attr {
+ CSR_ATTR_CHALLENGE_PASSWORD,
+};
+
+/**
+ * crypto_csr_init - Initialize empty CSR
+ * Returns: Pointer to CSR data or %NULL on failure
+ */
+struct crypto_csr * crypto_csr_init(void);
+
+/**
+ * crypto_csr_verify - Initialize CSR from CertificationRequest
+ * @req: DER encoding of ASN.1 CertificationRequest
+ *
+ * Returns: Pointer to CSR data or %NULL on failure or if signature is invalid
+ */
+struct crypto_csr * crypto_csr_verify(const struct wpabuf *req);
+
+/**
+ * crypto_csr_deinit - Free CSR structure
+ * @csr: CSR structure from @crypto_csr_init() or crypto_csr_verify()
+ */
+void crypto_csr_deinit(struct crypto_csr *csr);
+
+/**
+ * crypto_csr_set_ec_public_key - Set public key in CSR
+ * @csr: CSR structure from @crypto_csr_init()
+ * @key: EC public key to set as public key in the CSR
+ * Returns: 0 on success, -1 on failure
+ */
+int crypto_csr_set_ec_public_key(struct crypto_csr *csr,
+ struct crypto_ec_key *key);
+
+/**
+ * crypto_csr_set_name - Set name entry in CSR SubjectName
+ * @csr: CSR structure from @crypto_csr_init()
+ * @type: Name type to add into the CSR SubjectName
+ * @name: UTF-8 string to write in the CSR SubjectName
+ * Returns: 0 on success, -1 on failure
+ */
+int crypto_csr_set_name(struct crypto_csr *csr, enum crypto_csr_name type,
+ const char *name);
+
+/**
+ * crypto_csr_set_attribute - Set attribute in CSR
+ * @csr: CSR structure from @crypto_csr_init()
+ * @attr: Attribute identifier
+ * @attr_type: ASN.1 type of @value buffer
+ * @value: Attribute value
+ * @len: length of @value buffer
+ * Returns: 0 on success, -1 on failure
+ */
+int crypto_csr_set_attribute(struct crypto_csr *csr, enum crypto_csr_attr attr,
+ int attr_type, const u8 *value, size_t len);
+
+/**
+ * crypto_csr_get_attribute - Get attribute from CSR
+ * @csr: CSR structure from @crypto_csr_verify()
+ * @attr: Updated with atribute identifier
+ * @len: Updated with length of returned buffer
+ * @type: ASN.1 type of the attribute buffer
+ * Returns: Type, length, and pointer on attribute value or %NULL on failure
+ */
+const u8 * crypto_csr_get_attribute(struct crypto_csr *csr,
+ enum crypto_csr_attr attr,
+ size_t *len, int *type);
+
+/**
+ * crypto_csr_sign - Sign CSR and return ASN.1 CertificationRequest
+ * @csr: CSR structure from @crypto_csr_init()
+ * @key: Private key to sign the CSR (for now ony EC key are supported)
+ * @algo: Hash algorithm to use for the signature
+ * Returns: DER encoding of ASN.1 CertificationRequest for the CSR or %NULL on
+ * failure
+ */
+struct wpabuf * crypto_csr_sign(struct crypto_csr *csr,
+ struct crypto_ec_key *key,
+ enum crypto_hash_alg algo);
+
+#endif /* CRYPTO_H */