#include <apr_sha1.h>
#include "sha1.h"
static const unsigned char svn_sha1__empty_string_digest_array[] = {
0xda, 0x39, 0xa3, 0xee, 0x5e, 0x6b, 0x4b, 0x0d, 0x32, 0x55,
0xbf, 0xef, 0x95, 0x60, 0x18, 0x90, 0xaf, 0xd8, 0x07, 0x09
};
const unsigned char *
svn_sha1__empty_string_digest(void)
{
return svn_sha1__empty_string_digest_array;
}
const char *
svn_sha1__digest_to_cstring_display(const unsigned char digest[],
apr_pool_t *pool)
{
static const char *hex = "0123456789abcdef";
char *str = apr_palloc(pool, (APR_SHA1_DIGESTSIZE * 2) + 1);
int i;
for (i = 0; i < APR_SHA1_DIGESTSIZE; i++)
{
str[i*2] = hex[digest[i] >> 4];
str[i*2+1] = hex[digest[i] & 0x0f];
}
str[i*2] = '\0';
return str;
}
const char *
svn_sha1__digest_to_cstring(const unsigned char digest[], apr_pool_t *pool)
{
static const unsigned char zeros_digest[APR_SHA1_DIGESTSIZE] = { 0 };
if (memcmp(digest, zeros_digest, APR_SHA1_DIGESTSIZE) != 0)
return svn_sha1__digest_to_cstring_display(digest, pool);
else
return NULL;
}
svn_boolean_t
svn_sha1__digests_match(const unsigned char d1[], const unsigned char d2[])
{
static const unsigned char zeros[APR_SHA1_DIGESTSIZE] = { 0 };
return ((memcmp(d1, zeros, APR_SHA1_DIGESTSIZE) == 0)
|| (memcmp(d2, zeros, APR_SHA1_DIGESTSIZE) == 0)
|| (memcmp(d1, d2, APR_SHA1_DIGESTSIZE) == 0));
}