54 lines
1.1 KiB
C
54 lines
1.1 KiB
C
#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <errno.h>
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#include "pw_check.h"
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#include "config.h"
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void dec_salt(void) {
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size_t i;
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for (i = 0; i < sizeof(MU_SALT_ENC) / sizeof(int); i++)
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MU_SALT_BUF[i] = (char)MU_SALT_ENC[i];
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MU_SALT_BUF[i + 1] = '\0';
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}
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char *enc_password(const char *prog_name, const char *pass, const char *salt) {
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if (salt == NULL)
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dec_salt();
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char *cpass = crypt(pass, (salt == NULL) ? MU_SALT_BUF : salt);
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if (cpass == NULL) {
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if (prog_name != NULL)
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fprintf(stderr, "%s: %s\n", prog_name, strerror(errno));
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return NULL;
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}
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return cpass;
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}
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int pw_check(const char *prog_name, const struct passwd *pw, const char *pass) {
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if (pw->pw_passwd[0] == '\0' && pass[0] == '\0')
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return 0;
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if (pw->pw_passwd[0] == '!' || pw->pw_passwd[0] == '*') {
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if (prog_name != NULL)
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fprintf(stderr, "%s: Access denied\n", prog_name);
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return 1;
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}
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char *cpass = enc_password(prog_name, pass, NULL);
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if (cpass == NULL)
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return 1;
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if (!strcmp(pw->pw_passwd, cpass))
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return 0;
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if (prog_name != NULL)
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fprintf(stderr, "%s: Incorrect password\n", prog_name);
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return 1;
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}
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