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https://git.openldap.org/openldap/openldap.git
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151 lines
3.6 KiB
C
151 lines
3.6 KiB
C
/*
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* lutil_password(credentials, password)
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*
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* Returns true if user supplied credentials matches
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* the stored password.
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*
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* Due to the use of the crypt(3) function
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* this routine is NOT thread-safe.
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*/
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#include "portable.h"
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#include <ac/stdlib.h>
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#include <ac/string.h>
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#include <ac/unistd.h>
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#include "lutil_md5.h"
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#include "lutil_sha1.h"
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#include "lutil.h"
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/*
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* Return 0 if creds are good.
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*/
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int
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lutil_passwd(
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const char *cred,
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const char *passwd)
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{
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if (cred == NULL || passwd == NULL) {
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return -1;
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}
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if (strncasecmp(passwd, "{MD5}", sizeof("{MD5}") - 1) == 0 ) {
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lutil_MD5_CTX MD5context;
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unsigned char MD5digest[16];
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char base64digest[25]; /* ceiling(sizeof(input)/3) * 4 + 1 */
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const char *p = passwd + (sizeof("{MD5}") - 1);
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lutil_MD5Init(&MD5context);
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lutil_MD5Update(&MD5context,
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(const unsigned char *)cred, strlen(cred));
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lutil_MD5Final(MD5digest, &MD5context);
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if ( lutil_b64_ntop(MD5digest, sizeof(MD5digest),
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base64digest, sizeof(base64digest)) < 0)
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{
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return ( 1 );
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}
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return( strcmp(p, base64digest) );
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} else if (strncasecmp(passwd, "{SHA}",sizeof("{SHA}") - 1) == 0 ) {
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lutil_SHA1_CTX SHA1context;
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unsigned char SHA1digest[20];
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char base64digest[29]; /* ceiling(sizeof(input)/3) * 4 + 1 */
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const char *p = passwd + (sizeof("{SHA}") - 1);
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lutil_SHA1Init(&SHA1context);
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lutil_SHA1Update(&SHA1context,
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(const unsigned char *) cred, strlen(cred));
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lutil_SHA1Final(SHA1digest, &SHA1context);
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if (lutil_b64_ntop(SHA1digest, sizeof(SHA1digest),
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base64digest, sizeof(base64digest)) < 0)
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{
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return ( 1 );
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}
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return( strcmp(p, base64digest) );
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} else if (strncasecmp(passwd, "{SSHA}", sizeof("{SSHA}") - 1) == 0) {
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lutil_SHA1_CTX SHA1context;
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unsigned char SHA1digest[20];
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const char *p = passwd + (sizeof("{SSHA}") - 1);
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int pw_len = strlen(p);
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int rc;
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unsigned char *orig_pass = NULL;
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/* base64 un-encode password */
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orig_pass = (unsigned char *)malloc((size_t)(pw_len * 0.75 + 1));
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if ((rc = lutil_b64_pton(p, orig_pass, pw_len)) < 0)
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{
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free(orig_pass);
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return ( 1 );
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}
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/* hash credentials with salt */
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lutil_SHA1Init(&SHA1context);
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lutil_SHA1Update(&SHA1context,
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(const unsigned char *) cred, strlen(cred));
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lutil_SHA1Update(&SHA1context,
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(const unsigned char *) orig_pass + sizeof(SHA1digest),
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rc - sizeof(SHA1digest));
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lutil_SHA1Final(SHA1digest, &SHA1context);
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/* compare */
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rc = memcmp((char *)orig_pass, (char *)SHA1digest, sizeof(SHA1digest));
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free(orig_pass);
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return(rc);
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} else if (strncasecmp(passwd, "{SMD5}", sizeof("{SMD5}") - 1) == 0) {
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lutil_MD5_CTX MD5context;
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unsigned char MD5digest[16];
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const char *p = passwd + (sizeof("{SMD5}") - 1);
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int pw_len = strlen(p);
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int rc;
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unsigned char *orig_pass = NULL;
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/* base64 un-encode password */
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orig_pass = (unsigned char *)malloc((size_t)(pw_len * 0.75 + 1));
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if ((rc = lutil_b64_pton(p, orig_pass, pw_len)) < 0)
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{
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free(orig_pass);
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return ( 1 );
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}
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/* hash credentials with salt */
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lutil_MD5Init(&MD5context);
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lutil_MD5Update(&MD5context,
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(const unsigned char *) cred, strlen(cred));
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lutil_MD5Update(&MD5context,
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(const unsigned char *) orig_pass + sizeof(MD5digest),
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rc - sizeof(MD5digest));
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lutil_MD5Final(MD5digest, &MD5context);
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/* compare */
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rc = memcmp((char *)orig_pass, (char *)MD5digest, sizeof(MD5digest));
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free(orig_pass);
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return ( rc );
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#ifdef SLAPD_CRYPT
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} else if (strncasecmp(passwd, "{CRYPT}", sizeof("{CRYPT}") - 1) == 0 ) {
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const char *p = passwd + (sizeof("{CRYPT}") - 1);
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return( strcmp(p, crypt(cred, p)) );
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#endif
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}
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#ifdef SLAPD_CLEARTEXT
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return( strcmp(passwd, cred) );
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#else
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return( 1 );
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#endif
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}
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