static Lisp_Object Qwidget_type;
static Lisp_Object Qcodeset, Qdays, Qmonths, Qpaper;
+static Lisp_Object Qmd5, Qsha1, Qsha224, Qsha256, Qsha384, Qsha512;
+
static int internal_equal (Lisp_Object , Lisp_Object, int, int);
#ifndef HAVE_UNISTD_H
\f
/************************************************************************
- MD5 and SHA1
+ MD5, SHA-1, and SHA-2
************************************************************************/
#include "md5.h"
#include "sha1.h"
+#include "sha256.h"
+#include "sha512.h"
-/* Convert a possibly-signed character to an unsigned character. This is
- a bit safer than casting to unsigned char, since it catches some type
- errors that the cast doesn't. */
-static inline unsigned char to_uchar (char ch) { return ch; }
-
-/* TYPE: 0 for md5, 1 for sha1. */
+/* ALGORITHM is a symbol: md5, sha1, sha224 and so on. */
static Lisp_Object
-crypto_hash_function (int type, Lisp_Object object, Lisp_Object start, Lisp_Object end, Lisp_Object coding_system, Lisp_Object noerror, Lisp_Object binary)
+secure_hash (Lisp_Object algorithm, Lisp_Object object, Lisp_Object start, Lisp_Object end, Lisp_Object coding_system, Lisp_Object noerror, Lisp_Object binary)
{
int i;
EMACS_INT size;
register EMACS_INT b, e;
register struct buffer *bp;
EMACS_INT temp;
- Lisp_Object res=Qnil;
+ int digest_size;
+ void *(*hash_func) (const char *, size_t, void *);
+ Lisp_Object digest;
+
+ CHECK_SYMBOL (algorithm);
if (STRINGP (object))
{
object = code_convert_string (object, coding_system, Qnil, 1, 0, 0);
}
- switch (type)
+ if (EQ (algorithm, Qmd5))
{
- case 0: /* MD5 */
- {
- char digest[16];
- md5_buffer (SSDATA (object) + start_byte,
- SBYTES (object) - (size_byte - end_byte),
- digest);
+ digest_size = MD5_DIGEST_SIZE;
+ hash_func = md5_buffer;
+ }
+ else if (EQ (algorithm, Qsha1))
+ {
+ digest_size = SHA1_DIGEST_SIZE;
+ hash_func = sha1_buffer;
+ }
+ else if (EQ (algorithm, Qsha224))
+ {
+ digest_size = SHA224_DIGEST_SIZE;
+ hash_func = sha224_buffer;
+ }
+ else if (EQ (algorithm, Qsha256))
+ {
+ digest_size = SHA256_DIGEST_SIZE;
+ hash_func = sha256_buffer;
+ }
+ else if (EQ (algorithm, Qsha384))
+ {
+ digest_size = SHA384_DIGEST_SIZE;
+ hash_func = sha384_buffer;
+ }
+ else if (EQ (algorithm, Qsha512))
+ {
+ digest_size = SHA512_DIGEST_SIZE;
+ hash_func = sha512_buffer;
+ }
+ else
+ error ("Invalid algorithm arg: %s", SDATA (Fsymbol_name (algorithm)));
- if (NILP (binary))
- {
- char value[33];
- for (i = 0; i < 16; i++)
- sprintf (&value[2 * i], "%02x", to_uchar (digest[i]));
- res = make_string (value, 32);
- }
- else
- res = make_string (digest, 16);
- break;
- }
+ /* allocate 2 x digest_size so that it can be re-used to hold the
+ hexified value */
+ digest = make_uninit_string (digest_size * 2);
- case 1: /* SHA1 */
- {
- char digest[20];
- sha1_buffer (SSDATA (object) + start_byte,
- SBYTES (object) - (size_byte - end_byte),
- digest);
- if (NILP (binary))
- {
- char value[41];
- for (i = 0; i < 20; i++)
- sprintf (&value[2 * i], "%02x", to_uchar (digest[i]));
- res = make_string (value, 40);
- }
- else
- res = make_string (digest, 20);
- break;
- }
- }
+ hash_func (SSDATA (object) + start_byte,
+ SBYTES (object) - (size_byte - end_byte),
+ SSDATA (digest));
- return res;
+ if (NILP (binary))
+ {
+ unsigned char *p = SDATA (digest);
+ for (i = digest_size - 1; i >= 0; i--)
+ {
+ static char const hexdigit[16] = "0123456789abcdef";
+ int p_i = p[i];
+ p[2 * i] = hexdigit[p_i >> 4];
+ p[2 * i + 1] = hexdigit[p_i & 0xf];
+ }
+ return digest;
+ }
+ else
+ return make_unibyte_string (SDATA (digest), digest_size);
}
DEFUN ("md5", Fmd5, Smd5, 1, 5, 0,
guesswork fails. Normally, an error is signaled in such case. */)
(Lisp_Object object, Lisp_Object start, Lisp_Object end, Lisp_Object coding_system, Lisp_Object noerror)
{
- return crypto_hash_function (0, object, start, end, coding_system, noerror, Qnil);
+ return secure_hash (Qmd5, object, start, end, coding_system, noerror, Qnil);
}
-DEFUN ("sha1", Fsha1, Ssha1, 1, 4, 0,
- doc: /* Return the SHA-1 (Secure Hash Algorithm) of an OBJECT.
-
-OBJECT is either a string or a buffer. Optional arguments START and
-END are character positions specifying which portion of OBJECT for
-computing the hash. If BINARY is non-nil, return a string in binary
-form. */)
- (Lisp_Object object, Lisp_Object start, Lisp_Object end, Lisp_Object binary)
+DEFUN ("secure-hash", Fsecure_hash, Ssecure_hash, 2, 5, 0,
+ doc: /* Return the secure hash of an OBJECT.
+ALGORITHM is a symbol: md5, sha1, sha224, sha256, sha384 or sha512.
+OBJECT is either a string or a buffer.
+Optional arguments START and END are character positions specifying
+which portion of OBJECT for computing the hash. If BINARY is non-nil,
+return a string in binary form. */)
+ (Lisp_Object algorithm, Lisp_Object object, Lisp_Object start, Lisp_Object end, Lisp_Object binary)
{
- return crypto_hash_function (1, object, start, end, Qnil, Qnil, binary);
+ return secure_hash (algorithm, object, start, end, Qnil, Qnil, binary);
}
-
\f
void
syms_of_fns (void)
{
+ DEFSYM (Qmd5, "md5");
+ DEFSYM (Qsha1, "sha1");
+ DEFSYM (Qsha224, "sha224");
+ DEFSYM (Qsha256, "sha256");
+ DEFSYM (Qsha384, "sha384");
+ DEFSYM (Qsha512, "sha512");
+
/* Hash table stuff. */
Qhash_table_p = intern_c_string ("hash-table-p");
staticpro (&Qhash_table_p);
defsubr (&Sbase64_encode_string);
defsubr (&Sbase64_decode_string);
defsubr (&Smd5);
- defsubr (&Ssha1);
+ defsubr (&Ssecure_hash);
defsubr (&Slocale_info);
}
projects / emacs.git / commitdiff