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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
28/* Convenience function to calculate the HMAC from the data in BUFFER
29 of size LENGTH with key KEY of size KEYLEN using the algorithm ALGO avoiding the creating of a
30 hash object. The hash is returned in the caller provided buffer
31 DIGEST which must be large enough to hold the digest of the given
32 algorithm. */
33WS_DLL_PUBLIC gcry_error_t ws_hmac_buffer(int algo, void *digest, const void *buffer, size_t length, const void *key, size_t keylen);
34
35WS_DLL_PUBLIC gcry_error_t ws_cmac_buffer(int algo, void *digest, const void *buffer, size_t length, const void *key, size_t keylen);
36
37/* Convenience function to encrypt 8 bytes in BUFFER with DES using the 56 bits KEY expanded to
38 64 bits as key, encrypted data is returned in OUTPUT which must be at least 8 bytes large */
39WS_DLL_PUBLIC void crypt_des_ecb(uint8_t *output, const uint8_t *buffer, const uint8_t *key56);
40
41/* Convenience function for RSA decryption. Returns decrypted length on success, 0 on failure */
42WS_DLL_PUBLIC size_t rsa_decrypt_inplace(const unsigned len, unsigned char* data, gcry_sexp_t pk, bool pkcs1_padding, char **err);
43
57WS_DLL_PUBLIC gcry_error_t
58hkdf_expand(int hashalgo, const uint8_t *prk, unsigned prk_len, const uint8_t *info, unsigned info_len,
59 uint8_t *out, unsigned out_len);
60
61/*
62 * Calculate HKDF-Extract(salt, IKM) -> PRK according to RFC 5869.
63 * Caller MUST ensure that 'prk' is large enough to store the digest from hash
64 * algorithm 'hashalgo' (e.g. 32 bytes for SHA-256).
65 */
66static inline gcry_error_t
67hkdf_extract(int hashalgo, const uint8_t *salt, size_t salt_len, const uint8_t *ikm, size_t ikm_len, uint8_t *prk)
68{
69 /* PRK = HMAC-Hash(salt, IKM) where salt is key, and IKM is input. */
70 return ws_hmac_buffer(hashalgo, prk, ikm, ikm_len, salt, salt_len);
71}
72
73
74#endif /* __WSGCRYPT_H__ */
Definition mcast_stream.h:30
Definition file-pcapng.h:57
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)
Definition wsgcrypt.c:166