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#include "util_rt.h"
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#include <openssl/bio.h>
#include <openssl/evp.h>
void prne_succeed_or_die (const int ret) {
if (ret < 0) {
abort();
}
}
void prne_empty_func () {}
void *prne_malloc (const size_t se, const size_t cnt) {
if (SIZE_MAX / se < cnt) {
errno = ENOMEM;
return NULL;
}
return malloc(cnt * se);
}
void *prne_realloc (void *ptr, const size_t se, const size_t cnt) {
if (SIZE_MAX / se < cnt) {
errno = ENOMEM;
return NULL;
}
return realloc(ptr, se * cnt);
}
void *prne_calloc (const size_t se, const size_t cnt) {
return calloc(se, cnt);
}
void prne_free (void *ptr) {
free(ptr);
}
void prne_rnd_anum_str (prne_rnd_engine_t *rnd_engine, char *str, const size_t len) {
static const char SET[] = "qwertyuiopasdfghjklzxcvbnm0123456789";
size_t i = 0;
uint32_t n;
if (len >= 4) {
for (; i < len / 4 * 4; i += 4) {
n = prne_rnd_gen_int(rnd_engine);
str[i + 0] = SET[((uint8_t*)&n)[0] % sizeof(SET)];
str[i + 1] = SET[((uint8_t*)&n)[1] % sizeof(SET)];
str[i + 2] = SET[((uint8_t*)&n)[2] % sizeof(SET)];
str[i + 3] = SET[((uint8_t*)&n)[3] % sizeof(SET)];
}
}
if (i < len) {
n = prne_rnd_gen_int(rnd_engine);
for (; i < len; i += 1) {
str[i] = SET[((uint8_t*)&n)[i % 4] % sizeof(SET)];
}
}
}
size_t prne_str_shift_spaces (char *str, const size_t len) {
size_t i, ret = len;
for (i = 0; i < ret; ) {
if (isspace(str[i])) {
if (i + 1 >= ret) {
// last trailing whitespace
ret -= 1;
break;
}
memmove(str + i, str + i + 1, ret - i - 1);
ret -= 1;
}
else {
i += 1;
}
}
return ret;
}
struct timespec prne_sub_timespec (const struct timespec *a, const struct timespec *b) {
struct timespec ret;
if (a->tv_nsec < b->tv_nsec) {
ret.tv_sec = a->tv_sec - 1 - b->tv_sec;
ret.tv_nsec = 1000000000 + a->tv_nsec - b->tv_nsec;
}
else {
ret.tv_sec = a->tv_sec - b->tv_sec;
ret.tv_nsec = a->tv_nsec - b->tv_nsec;
}
return ret;
}
double prne_real_timespec (const struct timespec *ts) {
return (double)ts->tv_sec + (double)ts->tv_nsec / 1000000000.0;
}
int prne_cmp_timespec (const struct timespec *a, const struct timespec *b) {
if (a->tv_sec < b->tv_sec) {
return -1;
}
else if (a->tv_sec > b->tv_sec) {
return 1;
}
return a->tv_nsec < b->tv_nsec ? -1 : a->tv_nsec > b->tv_nsec ? 1 : 0;
}
char *prne_enc_base64_mem (const uint8_t *data, const size_t size) {
char *ret = NULL, *p = NULL;
BIO *b64_bio = NULL, *mem_bio = NULL;
bool ok = true;
int out_len;
if (size > INT32_MAX || size == 0) {
return NULL;
}
b64_bio = BIO_new(BIO_f_base64());
mem_bio = BIO_new(BIO_s_mem());
if (b64_bio == NULL || mem_bio == NULL) {
ok = false;
goto END;
}
BIO_set_flags(b64_bio, BIO_FLAGS_BASE64_NO_NL);
BIO_push(b64_bio, mem_bio);
if (BIO_write(b64_bio, data, size) != (int)size) {
ok = false;
goto END;
}
out_len = BIO_get_mem_data(mem_bio, &p);
if (out_len < 0) {
ok = false;
goto END;
}
if (out_len > 0) {
ret = (char*)prne_malloc(1, out_len + 1);
if (ret == NULL) {
ok = false;
goto END;
}
memcpy(ret, p, out_len);
ret[out_len] = 0;
}
END:
BIO_free(b64_bio);
BIO_free(mem_bio);
if (!ok) {
prne_free(ret);
ret = NULL;
}
return ret;
}
bool prne_dec_base64_mem (const char *str, const size_t str_len, uint8_t **data, size_t *size) {
char *in_mem = NULL;
size_t in_mem_len, out_len;
uint8_t *out_mem = NULL;
BIO *b64_bio = NULL, *mem_bio = NULL;
bool ret = true;
int read_size = 0;
if (str_len > INT32_MAX) {
errno = EINVAL;
return false;
}
if (str_len == 0) {
ret = true;
goto END;
}
in_mem = (char*)prne_malloc(1, str_len);
if (in_mem == NULL) {
ret = false;
goto END;
}
memcpy(in_mem, str, str_len);
in_mem_len = prne_str_shift_spaces(in_mem, str_len);
if (in_mem_len == 0) {
ret = true;
goto END;
}
b64_bio = BIO_new(BIO_f_base64());
mem_bio = BIO_new_mem_buf(in_mem, in_mem_len);
if (b64_bio == NULL || mem_bio == NULL) {
ret = false;
goto END;
}
BIO_set_flags(b64_bio, BIO_FLAGS_BASE64_NO_NL);
BIO_push(b64_bio, mem_bio);
out_len = in_mem_len * 3 / 4;
out_mem = (uint8_t*)prne_malloc(1, (size_t)out_len);
if (out_mem == NULL) {
ret = false;
goto END;
}
read_size = BIO_read(b64_bio, out_mem, out_len);
if (read_size < 0) {
ret = false;
goto END;
}
END:
BIO_free(b64_bio);
BIO_free(mem_bio);
prne_free(in_mem);
if (ret) {
if (read_size > 0) {
*data = out_mem;
*size = (size_t)read_size;
}
else {
prne_free(out_mem);
*data = NULL;
*size = 0;
}
}
else {
prne_free(out_mem);
}
return ret;
}
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