1: /*
2: * Copyright (c) 2007, Cameron Rich
3: *
4: * All rights reserved.
5: *
6: * Redistribution and use in source and binary forms, with or without
7: * modification, are permitted provided that the following conditions are met:
8: *
9: * * Redistributions of source code must retain the above copyright notice,
10: * this list of conditions and the following disclaimer.
11: * * Redistributions in binary form must reproduce the above copyright notice,
12: * this list of conditions and the following disclaimer in the documentation
13: * and/or other materials provided with the distribution.
14: * * Neither the name of the axTLS project nor the names of its contributors
15: * may be used to endorse or promote products derived from this software
16: * without specific prior written permission.
17: *
18: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19: * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20: * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21: * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
22: * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
23: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
24: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
25: * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
26: * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
27: * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
28: * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29: */
30:
31: /**
32: * @file crypto.h
33: */
34:
35: #ifndef HEADER_CRYPTO_H
36: #define HEADER_CRYPTO_H
37:
38: #ifdef __cplusplus
39: extern "C" {
40: #endif
41:
42: #include "config.h"
43: #include "bigint_impl.h"
44: #include "bigint.h"
45:
46: #ifndef STDCALL
47: #define STDCALL
48: #endif
49: #ifndef EXP_FUNC
50: #define EXP_FUNC
51: #endif
52:
53:
54: /* enable features based on a 'super-set' capbaility. */
55: #if defined(CONFIG_SSL_FULL_MODE)
56: #define CONFIG_SSL_ENABLE_CLIENT
57: #define CONFIG_SSL_CERT_VERIFICATION
58: #elif defined(CONFIG_SSL_ENABLE_CLIENT)
59: #define CONFIG_SSL_CERT_VERIFICATION
60: #endif
61:
62: /**************************************************************************
63: * AES declarations
64: **************************************************************************/
65:
66: #define AES_MAXROUNDS 14
67: #define AES_BLOCKSIZE 16
68: #define AES_IV_SIZE 16
69:
70: typedef struct aes_key_st
71: {
72: uint16_t rounds;
73: uint16_t key_size;
74: uint32_t ks[(AES_MAXROUNDS+1)*8];
75: uint8_t iv[AES_IV_SIZE];
76: } AES_CTX;
77:
78: typedef enum
79: {
80: AES_MODE_128,
81: AES_MODE_256
82: } AES_MODE;
83:
84: void AES_set_key(AES_CTX *ctx, const uint8_t *key,
85: const uint8_t *iv, AES_MODE mode);
86: void AES_cbc_encrypt(AES_CTX *ctx, const uint8_t *msg,
87: uint8_t *out, int length);
88: void AES_cbc_decrypt(AES_CTX *ks, const uint8_t *in, uint8_t *out, int length);
89: void AES_convert_key(AES_CTX *ctx);
90:
91: /**************************************************************************
92: * RC4 declarations
93: **************************************************************************/
94:
95: typedef struct
96: {
97: uint8_t x, y, m[256];
98: } RC4_CTX;
99:
100: void RC4_setup(RC4_CTX *s, const uint8_t *key, int length);
101: void RC4_crypt(RC4_CTX *s, const uint8_t *msg, uint8_t *data, int length);
102:
103: /**************************************************************************
104: * SHA1 declarations
105: **************************************************************************/
106:
107: #define SHA1_SIZE 20
108:
109: /*
110: * This structure will hold context information for the SHA-1
111: * hashing operation
112: */
113: typedef struct
114: {
115: uint32_t Intermediate_Hash[SHA1_SIZE/4]; /* Message Digest */
116: uint32_t Length_Low; /* Message length in bits */
117: uint32_t Length_High; /* Message length in bits */
118: uint16_t Message_Block_Index; /* Index into message block array */
119: uint8_t Message_Block[64]; /* 512-bit message blocks */
120: } SHA1_CTX;
121:
122: void SHA1_Init(SHA1_CTX *);
123: void SHA1_Update(SHA1_CTX *, const uint8_t * msg, int len);
124: void SHA1_Final(uint8_t *digest, SHA1_CTX *);
125:
126: /**************************************************************************
127: * MD2 declarations
128: **************************************************************************/
129:
130: #define MD2_SIZE 16
131:
132: typedef struct
133: {
134: unsigned char cksum[16]; /* checksum of the data block */
135: unsigned char state[48]; /* intermediate digest state */
136: unsigned char buffer[16]; /* data block being processed */
137: int left; /* amount of data in buffer */
138: } MD2_CTX;
139:
140: EXP_FUNC void STDCALL MD2_Init(MD2_CTX *ctx);
141: EXP_FUNC void STDCALL MD2_Update(MD2_CTX *ctx, const uint8_t *input, int ilen);
142: EXP_FUNC void STDCALL MD2_Final(uint8_t *digest, MD2_CTX *ctx);
143:
144: /**************************************************************************
145: * MD5 declarations
146: **************************************************************************/
147:
148: #define MD5_SIZE 16
149:
150: typedef struct
151: {
152: uint32_t state[4]; /* state (ABCD) */
153: uint32_t count[2]; /* number of bits, modulo 2^64 (lsb first) */
154: uint8_t buffer[64]; /* input buffer */
155: } MD5_CTX;
156:
157: EXP_FUNC void STDCALL MD5_Init(MD5_CTX *);
158: EXP_FUNC void STDCALL MD5_Update(MD5_CTX *, const uint8_t *msg, int len);
159: EXP_FUNC void STDCALL MD5_Final(uint8_t *digest, MD5_CTX *);
160:
161: /**************************************************************************
162: * HMAC declarations
163: **************************************************************************/
164: void hmac_md5(const uint8_t *msg, int length, const uint8_t *key,
165: int key_len, uint8_t *digest);
166: void hmac_sha1(const uint8_t *msg, int length, const uint8_t *key,
167: int key_len, uint8_t *digest);
168:
169: /**************************************************************************
170: * RSA declarations
171: **************************************************************************/
172:
173: typedef struct
174: {
175: bigint *m; /* modulus */
176: bigint *e; /* public exponent */
177: bigint *d; /* private exponent */
178: #ifdef CONFIG_BIGINT_CRT
179: bigint *p; /* p as in m = pq */
180: bigint *q; /* q as in m = pq */
181: bigint *dP; /* d mod (p-1) */
182: bigint *dQ; /* d mod (q-1) */
183: bigint *qInv; /* q^-1 mod p */
184: #endif
185: int num_octets;
186: BI_CTX *bi_ctx;
187: } RSA_CTX;
188:
189: void RSA_priv_key_new(RSA_CTX **rsa_ctx,
190: const uint8_t *modulus, int mod_len,
191: const uint8_t *pub_exp, int pub_len,
192: const uint8_t *priv_exp, int priv_len
193: #ifdef CONFIG_BIGINT_CRT
194: , const uint8_t *p, int p_len,
195: const uint8_t *q, int q_len,
196: const uint8_t *dP, int dP_len,
197: const uint8_t *dQ, int dQ_len,
198: const uint8_t *qInv, int qInv_len
199: #endif
200: );
201: void RSA_pub_key_new(RSA_CTX **rsa_ctx,
202: const uint8_t *modulus, int mod_len,
203: const uint8_t *pub_exp, int pub_len);
204: void RSA_free(RSA_CTX *ctx);
205: int RSA_decrypt(const RSA_CTX *ctx, const uint8_t *in_data, uint8_t *out_data,
206: int is_decryption);
207: bigint *RSA_private(const RSA_CTX *c, bigint *bi_msg);
208: #if defined(CONFIG_SSL_CERT_VERIFICATION) || defined(CONFIG_SSL_GENERATE_X509_CERT)
209: bigint *RSA_sign_verify(BI_CTX *ctx, const uint8_t *sig, int sig_len,
210: bigint *modulus, bigint *pub_exp);
211: bigint *RSA_public(const RSA_CTX * c, bigint *bi_msg);
212: int RSA_encrypt(const RSA_CTX *ctx, const uint8_t *in_data, uint16_t in_len,
213: uint8_t *out_data, int is_signing);
214: void RSA_print(const RSA_CTX *ctx);
215: #endif
216:
217: /**************************************************************************
218: * RNG declarations
219: **************************************************************************/
220: EXP_FUNC void STDCALL RNG_initialize(void);
221: EXP_FUNC void STDCALL RNG_custom_init(const uint8_t *seed_buf, int size);
222: EXP_FUNC void STDCALL RNG_terminate(void);
223: EXP_FUNC void STDCALL get_random(int num_rand_bytes, uint8_t *rand_data);
224: void get_random_NZ(int num_rand_bytes, uint8_t *rand_data);
225:
226: #ifdef __cplusplus
227: }
228: #endif
229:
230: #endif
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