414 lines
14 KiB
C
414 lines
14 KiB
C
/*
|
|
* WPA Supplicant / wrapper functions for crypto libraries
|
|
* Copyright (c) 2004-2005, 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 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
|
|
*/
|
|
void 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
|
|
*/
|
|
void 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
|
|
*/
|
|
void 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 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
|
|
*/
|
|
void sha256_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)
|
|
*/
|
|
void 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)
|
|
*/
|
|
void 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)
|
|
*/
|
|
void 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
|
|
};
|
|
|
|
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 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 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);
|
|
|
|
/**
|
|
* crypto_private_key_import - Import an RSA private key
|
|
* @key: Key buffer (DER encoded RSA private key)
|
|
* @len: Key buffer length in bytes
|
|
* 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);
|
|
|
|
/**
|
|
* 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 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_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 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 crypto_public_key_decrypt_pkcs1(struct crypto_public_key *key,
|
|
const u8 *crypt, size_t crypt_len,
|
|
u8 *plain, size_t *plain_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 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 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);
|
|
|
|
#endif /* CRYPTO_H */
|