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sha: add sha256_printf() #725

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merged 1 commit into from
Mar 2, 2023
Merged

sha: add sha256_printf() #725

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1 change: 1 addition & 0 deletions include/re_sha.h
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Original file line number Diff line number Diff line change
Expand Up @@ -26,3 +26,4 @@

void sha1(const uint8_t *d, size_t n, uint8_t *md);
void sha256(const uint8_t *d, size_t n, uint8_t *md);
int sha256_printf(uint8_t md[32], const char *fmt, ...);
30 changes: 30 additions & 0 deletions src/sha/wrap.c
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Expand Up @@ -6,6 +6,7 @@
*/

#include <re_types.h>
#include <re_mbuf.h>
#ifdef USE_OPENSSL
#include <openssl/sha.h>
#elif defined (__APPLE__)
Expand Down Expand Up @@ -56,3 +57,32 @@ void sha256(const uint8_t *d, size_t n, uint8_t *md)
#error missing SHA-256 backend
#endif
}


/**
* Calculate the SHA-256 hash from a formatted string
*
* @param md Calculated SHA-256 hash
* @param fmt Formatted string
*
* @return 0 if success, otherwise errorcode
*/
int sha256_printf(uint8_t md[32], const char *fmt, ...)
{
struct mbuf mb;
va_list ap;
int err;

mbuf_init(&mb);

va_start(ap, fmt);
err = mbuf_vprintf(&mb, fmt, ap);
va_end(ap);

if (!err)
sha256(mb.buf, mb.end, md);

mbuf_reset(&mb);

return err;
}