mbed TLS v2.16.12
chacha20.h
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1 
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58 
59 #ifndef MBEDTLS_CHACHA20_H
60 #define MBEDTLS_CHACHA20_H
61 
62 #if !defined(MBEDTLS_CONFIG_FILE)
63 #include "config.h"
64 #else
65 #include MBEDTLS_CONFIG_FILE
66 #endif
67 
68 #include <stdint.h>
69 #include <stddef.h>
70 
72 #define MBEDTLS_ERR_CHACHA20_BAD_INPUT_DATA -0x0051
73 
74 /* MBEDTLS_ERR_CHACHA20_FEATURE_UNAVAILABLE is deprecated and should not be
75  * used. */
77 #define MBEDTLS_ERR_CHACHA20_FEATURE_UNAVAILABLE -0x0053
78 
79 /* MBEDTLS_ERR_CHACHA20_HW_ACCEL_FAILED is deprecated and should not be used.
80  */
82 #define MBEDTLS_ERR_CHACHA20_HW_ACCEL_FAILED -0x0055
83 
84 #ifdef __cplusplus
85 extern "C" {
86 #endif
87 
88 #if !defined(MBEDTLS_CHACHA20_ALT)
89 
91 {
92  uint32_t state[16];
93  uint8_t keystream8[64];
95 }
97 
98 #else /* MBEDTLS_CHACHA20_ALT */
99 #include "chacha20_alt.h"
100 #endif /* MBEDTLS_CHACHA20_ALT */
101 
118 
129 
147  const unsigned char key[32] );
148 
169  const unsigned char nonce[12],
170  uint32_t counter );
171 
202  size_t size,
203  const unsigned char *input,
204  unsigned char *output );
205 
234 int mbedtls_chacha20_crypt( const unsigned char key[32],
235  const unsigned char nonce[12],
236  uint32_t counter,
237  size_t size,
238  const unsigned char* input,
239  unsigned char* output );
240 
241 #if defined(MBEDTLS_SELF_TEST)
248 int mbedtls_chacha20_self_test( int verbose );
249 #endif /* MBEDTLS_SELF_TEST */
250 
251 #ifdef __cplusplus
252 }
253 #endif
254 
255 #endif /* MBEDTLS_CHACHA20_H */
void mbedtls_chacha20_free(mbedtls_chacha20_context *ctx)
This function releases and clears the specified ChaCha20 context.
int mbedtls_chacha20_crypt(const unsigned char key[32], const unsigned char nonce[12], uint32_t counter, size_t size, const unsigned char *input, unsigned char *output)
This function encrypts or decrypts data with ChaCha20 and the given key and nonce.
int mbedtls_chacha20_setkey(mbedtls_chacha20_context *ctx, const unsigned char key[32])
This function sets the encryption/decryption key.
void mbedtls_chacha20_init(mbedtls_chacha20_context *ctx)
This function initializes the specified ChaCha20 context.
int mbedtls_chacha20_starts(mbedtls_chacha20_context *ctx, const unsigned char nonce[12], uint32_t counter)
This function sets the nonce and initial counter value.
int mbedtls_chacha20_self_test(int verbose)
The ChaCha20 checkup routine.
struct mbedtls_chacha20_context mbedtls_chacha20_context
int mbedtls_chacha20_update(mbedtls_chacha20_context *ctx, size_t size, const unsigned char *input, unsigned char *output)
This function encrypts or decrypts data.
Configuration options (set of defines)
uint8_t keystream8[64]
Definition: chacha20.h:93
uint32_t state[16]
Definition: chacha20.h:92