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int ripemd160_init(void **shaState);
int ripemd160_destroy(void *shaState);
int ripemd160_update(void *hs,
const uint8_t *buf,
size_t len);
int ripemd160_digest(const void *shaState,
uint8_t digest[20]);
int ripemd160_copy(const void *src, void *dst);
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:vartype digest_size: integer
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