[thirdparty/git.git] / sha1dc_git.c

#include "cache.h"

/*
 * Same as SHA1DCFinal, but convert collision attack case into a verbose die().
 */
void git_SHA1DCFinal(unsigned char hash[20], SHA1_CTX *ctx)
{
	if (!SHA1DCFinal(hash, ctx))
		return;
	die("SHA-1 appears to be part of a collision attack: %s",
	    sha1_to_hex(hash));
}

/*
 * Same as SHA1DCUpdate, but adjust types to match git's usual interface.
 */
void git_SHA1DCUpdate(SHA1_CTX *ctx, const void *vdata, unsigned long len)
{
	const char *data = vdata;
	/* We expect an unsigned long, but sha1dc only takes an int */
	while (len > INT_MAX) {
		SHA1DCUpdate(ctx, data, INT_MAX);
		data += INT_MAX;
		len -= INT_MAX;
	}
	SHA1DCUpdate(ctx, data, len);
}
Commit	Line	Data
36f048c5 TI	1	#include "cache.h"
36f048c5 TI	2
a0103914	3	/*
36f048c5	4	* Same as SHA1DCFinal, but convert collision attack case into a verbose die().
a0103914	5	*/
a0103914 ÆAB	6	void git_SHA1DCFinal(unsigned char hash[20], SHA1_CTX *ctx)
	7	{
	8	if (!SHA1DCFinal(hash, ctx))
	9	return;
	10	die("SHA-1 appears to be part of a collision attack: %s",
	11	sha1_to_hex(hash));
	12	}
	13
36f048c5 TI	14	/*
	15	* Same as SHA1DCUpdate, but adjust types to match git's usual interface.
	16	*/
a0103914 ÆAB	17	void git_SHA1DCUpdate(SHA1_CTX ctx, const void vdata, unsigned long len)
	18	{
	19	const char *data = vdata;
	20	/* We expect an unsigned long, but sha1dc only takes an int */
	21	while (len > INT_MAX) {
	22	SHA1DCUpdate(ctx, data, INT_MAX);
	23	data += INT_MAX;
	24	len -= INT_MAX;
	25	}
	26	SHA1DCUpdate(ctx, data, len);
	27	}