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CRYPTO_SET_MEM_FUNCTIONS(3) Library Functions Manual CRYPTO_SET_MEM_FUNCTIONS(3)

CRYPTO_set_mem_functions, CRYPTO_mem_ctrl, CRYPTO_mem_leaks, CRYPTO_mem_leaks_fp, CRYPTO_mem_leaks_cblegacy OpenSSL memory allocation control

#include <openssl/crypto.h>

int
CRYPTO_set_mem_functions(void *(*m)(size_t, const char *, int), void *(*r)(void *, size_t, const char *, int), void (*f)(void *, const char *, int));

int
CRYPTO_mem_ctrl(int mode);

int
CRYPTO_mem_leaks(BIO *b);

int
CRYPTO_mem_leaks_fp(FILE *fp);

typedef int *
CRYPTO_MEM_LEAK_CB(unsigned long, const char *, int, int, void *);

int
CRYPTO_mem_leaks_cb(CRYPTO_MEM_LEAK_CB *cb);

Do not use any of the interfaces documented here. They are provided purely for compatibility with legacy application code.

(), (), (), (), and () have no effect.

CRYPTO_set_mem_functions() always returns 0.

CRYPTO_mem_ctrl() always returns CRYPTO_MEM_CHECK_OFF.

CRYPTO_mem_leaks(), CRYPTO_mem_leaks_fp(), and CRYPTO_mem_leaks_cb() always return -1.

crypto(3)

CRYPTO_mem_ctrl(), CRYPTO_mem_leaks(), and CRYPTO_mem_leaks_fp() first appeared in SSLeay 0.6.4. CRYPTO_set_mem_functions() first appeared in SSLeay 0.6.5. CRYPTO_mem_leaks_cb() first appeared in SSLeay 0.6.6. All these functions have all been available since OpenBSD 2.4.

March 8, 2025 OpenBSD-current