mbed TLS v2.16.7
chacha20.h
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1 
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60 
61 #ifndef MBEDTLS_CHACHA20_H
62 #define MBEDTLS_CHACHA20_H
63 
64 #if !defined(MBEDTLS_CONFIG_FILE)
65 #include "config.h"
66 #else
67 #include MBEDTLS_CONFIG_FILE
68 #endif
69 
70 #include <stdint.h>
71 #include <stddef.h>
72 
73 #define MBEDTLS_ERR_CHACHA20_BAD_INPUT_DATA -0x0051
75 /* MBEDTLS_ERR_CHACHA20_FEATURE_UNAVAILABLE is deprecated and should not be
76  * used. */
77 #define MBEDTLS_ERR_CHACHA20_FEATURE_UNAVAILABLE -0x0053
79 /* MBEDTLS_ERR_CHACHA20_HW_ACCEL_FAILED is deprecated and should not be used.
80  */
81 #define MBEDTLS_ERR_CHACHA20_HW_ACCEL_FAILED -0x0055
83 #ifdef __cplusplus
84 extern "C" {
85 #endif
86 
87 #if !defined(MBEDTLS_CHACHA20_ALT)
88 
90 {
91  uint32_t state[16];
92  uint8_t keystream8[64];
94 }
96 
97 #else /* MBEDTLS_CHACHA20_ALT */
98 #include "chacha20_alt.h"
99 #endif /* MBEDTLS_CHACHA20_ALT */
100 
117 
128 
146  const unsigned char key[32] );
147 
168  const unsigned char nonce[12],
169  uint32_t counter );
170 
201  size_t size,
202  const unsigned char *input,
203  unsigned char *output );
204 
233 int mbedtls_chacha20_crypt( const unsigned char key[32],
234  const unsigned char nonce[12],
235  uint32_t counter,
236  size_t size,
237  const unsigned char* input,
238  unsigned char* output );
239 
240 #if defined(MBEDTLS_SELF_TEST)
241 
247 int mbedtls_chacha20_self_test( int verbose );
248 #endif /* MBEDTLS_SELF_TEST */
249 
250 #ifdef __cplusplus
251 }
252 #endif
253 
254 #endif /* MBEDTLS_CHACHA20_H */
struct mbedtls_chacha20_context mbedtls_chacha20_context
Configuration options (set of defines)
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_self_test(int verbose)
The ChaCha20 checkup routine.
uint8_t keystream8[64]
Definition: chacha20.h:92
int mbedtls_chacha20_setkey(mbedtls_chacha20_context *ctx, const unsigned char key[32])
This function sets the encryption/decryption key.
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.
void mbedtls_chacha20_free(mbedtls_chacha20_context *ctx)
This function releases and clears the specified 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.
void mbedtls_chacha20_init(mbedtls_chacha20_context *ctx)
This function initializes the specified ChaCha20 context.
uint32_t state[16]
Definition: chacha20.h:91