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+/*
+ * Copyright (c) 2007, Cameron Rich
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * * Neither the name of the axTLS project nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/**
+ * @file crypto.h
+ */
+
+#ifndef HEADER_CRYPTO_H
+#define HEADER_CRYPTO_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "config.h"
+#include "bigint_impl.h"
+#include "bigint.h"
+
+#ifndef STDCALL
+#define STDCALL
+#endif
+#ifndef EXP_FUNC
+#define EXP_FUNC
+#endif
+
+
+/* enable features based on a 'super-set' capbaility. */
+#if defined(CONFIG_SSL_FULL_MODE)
+#define CONFIG_SSL_ENABLE_CLIENT
+#define CONFIG_SSL_CERT_VERIFICATION
+#elif defined(CONFIG_SSL_ENABLE_CLIENT)
+#define CONFIG_SSL_CERT_VERIFICATION
+#endif
+
+/**************************************************************************
+ * AES declarations
+ **************************************************************************/
+
+#define AES_MAXROUNDS 14
+#define AES_BLOCKSIZE 16
+#define AES_IV_SIZE 16
+
+typedef struct aes_key_st
+{
+ uint16_t rounds;
+ uint16_t key_size;
+ uint32_t ks[(AES_MAXROUNDS+1)*8];
+ uint8_t iv[AES_IV_SIZE];
+} AES_CTX;
+
+typedef enum
+{
+ AES_MODE_128,
+ AES_MODE_256
+} AES_MODE;
+
+void AES_set_key(AES_CTX *ctx, const uint8_t *key,
+ const uint8_t *iv, AES_MODE mode);
+void AES_cbc_encrypt(AES_CTX *ctx, const uint8_t *msg,
+ uint8_t *out, int length);
+void AES_cbc_decrypt(AES_CTX *ks, const uint8_t *in, uint8_t *out, int length);
+void AES_convert_key(AES_CTX *ctx);
+
+/**************************************************************************
+ * RC4 declarations
+ **************************************************************************/
+
+typedef struct
+{
+ uint8_t x, y, m[256];
+} RC4_CTX;
+
+void RC4_setup(RC4_CTX *s, const uint8_t *key, int length);
+void RC4_crypt(RC4_CTX *s, const uint8_t *msg, uint8_t *data, int length);
+
+/**************************************************************************
+ * SHA1 declarations
+ **************************************************************************/
+
+#define SHA1_SIZE 20
+
+/*
+ * This structure will hold context information for the SHA-1
+ * hashing operation
+ */
+typedef struct
+{
+ uint32_t Intermediate_Hash[SHA1_SIZE/4]; /* Message Digest */
+ uint32_t Length_Low; /* Message length in bits */
+ uint32_t Length_High; /* Message length in bits */
+ uint16_t Message_Block_Index; /* Index into message block array */
+ uint8_t Message_Block[64]; /* 512-bit message blocks */
+} SHA1_CTX;
+
+void SHA1_Init(SHA1_CTX *);
+void SHA1_Update(SHA1_CTX *, const uint8_t * msg, int len);
+void SHA1_Final(uint8_t *digest, SHA1_CTX *);
+
+/**************************************************************************
+ * MD2 declarations
+ **************************************************************************/
+
+#define MD2_SIZE 16
+
+typedef struct
+{
+ unsigned char cksum[16]; /* checksum of the data block */
+ unsigned char state[48]; /* intermediate digest state */
+ unsigned char buffer[16]; /* data block being processed */
+ int left; /* amount of data in buffer */
+} MD2_CTX;
+
+EXP_FUNC void STDCALL MD2_Init(MD2_CTX *ctx);
+EXP_FUNC void STDCALL MD2_Update(MD2_CTX *ctx, const uint8_t *input, int ilen);
+EXP_FUNC void STDCALL MD2_Final(uint8_t *digest, MD2_CTX *ctx);
+
+/**************************************************************************
+ * MD5 declarations
+ **************************************************************************/
+
+#define MD5_SIZE 16
+
+typedef struct
+{
+ uint32_t state[4]; /* state (ABCD) */
+ uint32_t count[2]; /* number of bits, modulo 2^64 (lsb first) */
+ uint8_t buffer[64]; /* input buffer */
+} MD5_CTX;
+
+EXP_FUNC void STDCALL MD5_Init(MD5_CTX *);
+EXP_FUNC void STDCALL MD5_Update(MD5_CTX *, const uint8_t *msg, int len);
+EXP_FUNC void STDCALL MD5_Final(uint8_t *digest, MD5_CTX *);
+
+/**************************************************************************
+ * HMAC declarations
+ **************************************************************************/
+void hmac_md5(const uint8_t *msg, int length, const uint8_t *key,
+ int key_len, uint8_t *digest);
+void hmac_sha1(const uint8_t *msg, int length, const uint8_t *key,
+ int key_len, uint8_t *digest);
+
+/**************************************************************************
+ * RSA declarations
+ **************************************************************************/
+
+typedef struct
+{
+ bigint *m; /* modulus */
+ bigint *e; /* public exponent */
+ bigint *d; /* private exponent */
+#ifdef CONFIG_BIGINT_CRT
+ bigint *p; /* p as in m = pq */
+ bigint *q; /* q as in m = pq */
+ bigint *dP; /* d mod (p-1) */
+ bigint *dQ; /* d mod (q-1) */
+ bigint *qInv; /* q^-1 mod p */
+#endif
+ int num_octets;
+ BI_CTX *bi_ctx;
+} RSA_CTX;
+
+void RSA_priv_key_new(RSA_CTX **rsa_ctx,
+ const uint8_t *modulus, int mod_len,
+ const uint8_t *pub_exp, int pub_len,
+ const uint8_t *priv_exp, int priv_len
+#ifdef CONFIG_BIGINT_CRT
+ , const uint8_t *p, int p_len,
+ const uint8_t *q, int q_len,
+ const uint8_t *dP, int dP_len,
+ const uint8_t *dQ, int dQ_len,
+ const uint8_t *qInv, int qInv_len
+#endif
+ );
+void RSA_pub_key_new(RSA_CTX **rsa_ctx,
+ const uint8_t *modulus, int mod_len,
+ const uint8_t *pub_exp, int pub_len);
+void RSA_free(RSA_CTX *ctx);
+int RSA_decrypt(const RSA_CTX *ctx, const uint8_t *in_data, uint8_t *out_data,
+ int is_decryption);
+bigint *RSA_private(const RSA_CTX *c, bigint *bi_msg);
+#if defined(CONFIG_SSL_CERT_VERIFICATION) || defined(CONFIG_SSL_GENERATE_X509_CERT)
+bigint *RSA_sign_verify(BI_CTX *ctx, const uint8_t *sig, int sig_len,
+ bigint *modulus, bigint *pub_exp);
+bigint *RSA_public(const RSA_CTX * c, bigint *bi_msg);
+int RSA_encrypt(const RSA_CTX *ctx, const uint8_t *in_data, uint16_t in_len,
+ uint8_t *out_data, int is_signing);
+void RSA_print(const RSA_CTX *ctx);
+#endif
+
+/**************************************************************************
+ * RNG declarations
+ **************************************************************************/
+EXP_FUNC void STDCALL RNG_initialize(void);
+EXP_FUNC void STDCALL RNG_custom_init(const uint8_t *seed_buf, int size);
+EXP_FUNC void STDCALL RNG_terminate(void);
+EXP_FUNC void STDCALL get_random(int num_rand_bytes, uint8_t *rand_data);
+void get_random_NZ(int num_rand_bytes, uint8_t *rand_data);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
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