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wsgcrypt.h
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1
15#ifndef __WSGCRYPT_H__
16#define __WSGCRYPT_H__
17
18#include <wireshark.h>
19#include <gcrypt.h>
20
21#define HASH_MD5_LENGTH 16
22#define HASH_SHA1_LENGTH 20
23#define HASH_SHA2_224_LENGTH 28
24#define HASH_SHA2_256_LENGTH 32
25#define HASH_SHA2_384_LENGTH 48
26#define HASH_SHA2_512_LENGTH 64
27#define AEAD_AES_128_GCM_KEY_LENGTH 16
28#define AEAD_AES_256_GCM_KEY_LENGTH 32
29#define AEAD_CHACHA20POLY1305_KEY_LENGTH 32
30#define AEAD_MAX_KEY_LENGTH 32
31#define HPKE_AEAD_NONCE_LENGTH 12
32#define HPKE_AEAD_AUTH_TAG_LENGTH 16
33#define HPKE_HKDF_SHA256 1
34#define HPKE_HKDF_SHA384 2
35#define HPKE_HKDF_SHA512 3
36#define HPKE_AEAD_AES_128_GCM 1
37#define HPKE_AEAD_AES_256_GCM 2
38#define HPKE_AEAD_CHACHA20POLY1305 3
39#define HPKE_SUIT_ID_LEN 10
40#define HPKE_SUIT_PREFIX "HPKE"
41#define HPKE_VERSION_ID "HPKE-v1"
42#define HPKE_MAX_KDF_LEN HASH_SHA2_512_LENGTH
43#define HPKE_MODE_BASE 0
44#define HPKE_MODE_PSK 1
45#define HPKE_MODE_AUTH 2
46#define HPKE_MODE_AUTH_PSK 3
47
65WS_DLL_PUBLIC gcry_error_t ws_hmac_buffer(int algo, void *digest,
66 const void *buffer, size_t length,
67 const void *key, size_t keylen);
68
69
86WS_DLL_PUBLIC gcry_error_t ws_cmac_buffer(int algo, void *digest,
87 const void *buffer, size_t length,
88 const void *key, size_t keylen);
89
90
103WS_DLL_PUBLIC gcry_error_t crypt_des_ecb(uint8_t *output, const uint8_t *buffer, const uint8_t *key56);
104
105
121WS_DLL_PUBLIC size_t rsa_decrypt_inplace(const unsigned len, unsigned char* data,
122 gcry_sexp_t pk, bool pkcs1_padding, char **err);
123
142WS_DLL_PUBLIC size_t rsa_decrypt(const unsigned len, const unsigned char* data,
143 uint8_t** plain,
144 gcry_sexp_t pk, const char* flags, char **err);
145
161WS_DLL_PUBLIC gcry_error_t
162 hkdf_expand(int hashalgo, const uint8_t *prk, unsigned prk_len, const uint8_t *info, unsigned info_len,
163 uint8_t *out, unsigned out_len);
164
182 static inline gcry_error_t
183hkdf_extract(int hashalgo, const uint8_t *salt, size_t salt_len, const uint8_t *ikm, size_t ikm_len, uint8_t *prk)
184{
185 /* PRK = HMAC-Hash(salt, IKM) where salt is key, and IKM is input. */
186 return ws_hmac_buffer(hashalgo, prk, ikm, ikm_len, salt, salt_len);
187}
188
200WS_DLL_PUBLIC uint16_t
201 hpke_hkdf_len(uint16_t kdf_id);
202
203
214WS_DLL_PUBLIC uint16_t
215 hpke_aead_key_len(uint16_t aead_id);
216
217
227WS_DLL_PUBLIC uint16_t
228 hpke_aead_nonce_len(uint16_t aead_id);
229
230
242WS_DLL_PUBLIC uint16_t
243 hpke_aead_auth_tag_len(uint16_t aead_id);
244
245
258WS_DLL_PUBLIC void
259 hpke_suite_id(uint16_t kem_id, uint16_t kdf_id, uint16_t aead_id, uint8_t *suite_id);
260
261
281WS_DLL_PUBLIC gcry_error_t
282 hpke_key_schedule(uint16_t kdf_id, uint16_t aead_id,
283 const uint8_t *salt, unsigned salt_len,
284 const uint8_t *suite_id,
285 const uint8_t *ikm, unsigned ikm_len,
286 uint8_t mode, uint8_t *key, uint8_t *base_nonce);
287
288
300WS_DLL_PUBLIC gcry_error_t
301 hpke_setup_aead(gcry_cipher_hd_t* cipher, uint16_t aead_id, uint8_t *key);
302
303
316WS_DLL_PUBLIC gcry_error_t
317 hpke_set_nonce(gcry_cipher_hd_t cipher, uint64_t seq,
318 uint8_t *base_nonce, size_t nonce_len);
319
320
321#endif /* __WSGCRYPT_H__ */
buffer
Definition mcast_stream.h:30
info
Definition file-pcapng.h:57
hpke_set_nonce
WS_DLL_PUBLIC gcry_error_t hpke_set_nonce(gcry_cipher_hd_t cipher, uint64_t seq, uint8_t *base_nonce, size_t nonce_len)
Set the nonce for an AEAD cipher using sequence number and base nonce.
Definition wsgcrypt.c:427
ws_cmac_buffer
WS_DLL_PUBLIC gcry_error_t ws_cmac_buffer(int algo, void *digest, const void *buffer, size_t length, const void *key, size_t keylen)
Compute CMAC over a buffer using the specified algorithm.
Definition wsgcrypt.c:33
hpke_aead_key_len
WS_DLL_PUBLIC uint16_t hpke_aead_key_len(uint16_t aead_id)
Return the key length for a given AEAD algorithm identifier.
Definition wsgcrypt.c:291
hkdf_expand
WS_DLL_PUBLIC gcry_error_t hkdf_expand(int hashalgo, const uint8_t *prk, unsigned prk_len, const uint8_t *info, unsigned info_len, uint8_t *out, unsigned out_len)
Perform HKDF-Expand as defined in RFC 5869.
Definition wsgcrypt.c:197
hpke_aead_nonce_len
WS_DLL_PUBLIC uint16_t hpke_aead_nonce_len(uint16_t aead_id)
Return the nonce length for a given AEAD algorithm identifier.
Definition wsgcrypt.c:306
hpke_setup_aead
WS_DLL_PUBLIC gcry_error_t hpke_setup_aead(gcry_cipher_hd_t *cipher, uint16_t aead_id, uint8_t *key)
Initialize AEAD cipher context for HPKE.
Definition wsgcrypt.c:405
crypt_des_ecb
WS_DLL_PUBLIC gcry_error_t crypt_des_ecb(uint8_t *output, const uint8_t *buffer, const uint8_t *key56)
Encrypt 8 bytes using DES in ECB mode.
Definition wsgcrypt.c:52
rsa_decrypt_inplace
WS_DLL_PUBLIC size_t rsa_decrypt_inplace(const unsigned len, unsigned char *data, gcry_sexp_t pk, bool pkcs1_padding, char **err)
Perform RSA decryption in-place.
Definition wsgcrypt.c:82
ws_hmac_buffer
WS_DLL_PUBLIC gcry_error_t ws_hmac_buffer(int algo, void *digest, const void *buffer, size_t length, const void *key, size_t keylen)
Compute HMAC over a buffer using the specified algorithm.
Definition wsgcrypt.c:15
hpke_key_schedule
WS_DLL_PUBLIC gcry_error_t hpke_key_schedule(uint16_t kdf_id, uint16_t aead_id, const uint8_t *salt, unsigned salt_len, const uint8_t *suite_id, const uint8_t *ikm, unsigned ikm_len, uint8_t mode, uint8_t *key, uint8_t *base_nonce)
Derive HPKE key and base nonce using the key schedule.
Definition wsgcrypt.c:377
rsa_decrypt
WS_DLL_PUBLIC size_t rsa_decrypt(const unsigned len, const unsigned char *data, uint8_t **plain, gcry_sexp_t pk, const char *flags, char **err)
Perform RSA decryption and allocate a buffer for the resulta.
Definition wsgcrypt.c:141
hpke_hkdf_len
WS_DLL_PUBLIC uint16_t hpke_hkdf_len(uint16_t kdf_id)
Return the output length of the HKDF for a given KDF identifier.
Definition wsgcrypt.c:276
hpke_suite_id
WS_DLL_PUBLIC void hpke_suite_id(uint16_t kem_id, uint16_t kdf_id, uint16_t aead_id, uint8_t *suite_id)
Construct the HPKE suite identifier.
Definition wsgcrypt.c:332
hpke_aead_auth_tag_len
WS_DLL_PUBLIC uint16_t hpke_aead_auth_tag_len(uint16_t aead_id)
Return the authentication tag length for a given AEAD algorithm identifier.
Definition wsgcrypt.c:319