Good Random Password Generator
Strong Password Generator
Bpwsgen is a program that enables you to create secure passwords or lists of passwords. All that is required is a length and the count to be created, You also have nine optional options that can be used to style the output of the passwords.
Compile the program
The Source CodeCode:gcc pwdgen.c - o pwsgen
Run the programCode:/* Strong Random Password Generator */ #include <stdio.h> #include <stdlib.h> #include <ctype.h> #include <time.h> #include <string.h> #define MIN_PWS_LENGTH 6 #define MIN_PWS_COUNT 1 #define MIN_PWS_COUNT 1 #define MAX_MASK_LEN 256 #define MAX_PWS_LEN 256 #define MAX_FLAGS 10 #define MAX_PASSWORDS 4000 #define TRUE 1 #define FALSE 0 //Password mask types. char *pLowcase = "abcdefghijklmnopqrstuvwxyz"; char *pUppercase = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; char *pDigits = "0123456789"; char *pPunctuation = "!\"#$%&'()*+,-./:;<=>?@[]^_{|}~"; char *pHex = "ABCDEF0123456789"; char *sp = " "; //Holds the option types of passwords to generate. int i_flags = 0; char flags[MAX_FLAGS]; //Holds the generated password. char pws[MAX_PWS_LEN]; int flag_exsits(char c){ //Look in the flags array if a char is found int x = 0; int Found = FALSE; while(x < i_flags){ //Check if c is in flags if(c == flags[x]){ //Yes it is found Found = TRUE; //Here we exit the loop break; } //INC counter x++; } return Found; } int is_vowel(char c){ char ch = toupper(c); if(ch == 'A' || ch == 'E' || ch == 'I' || ch == 'O' || ch == 'U'){ return 1; }else{ return 0; } } int main(int argc, char **argv) { char c = '\0'; char flag = '\0'; char pTempMask[MAX_MASK_LEN]; char pMask[MAX_MASK_LEN]; int pMaskLen = 0; int length = MIN_PWS_LENGTH; int count = MIN_PWS_COUNT; int x = 2; int i = 0; int j = 0; int rnd = 0; int rm_vowels = FALSE; int ln_No = FALSE; int Exclude_simlar = FALSE; //Get random seed. srand((unsigned int)time(NULL)); if(argc < 3){ printf("-------------------------------------------------------------------------------\n"); printf("bpwsgen :: Strong Random Password Generator Version 1.3a\n"); printf("-------------------------------------------------------------------------------\n"); printf("\nSimple Usage :: bpwsgen length count /[OPTIONS]\n"); printf("\n Length :: Length of the password to create.\n"); printf(" Count :: Number of passwords to create.\n"); printf("\n Options ::\n\n"); printf(" /U Include upper case characters A-Z\n"); printf(" /L Include lower case characters a-z\n"); printf(" /D Include digits 0-9\n"); printf(" /P Include punctuation and others.\n"); printf(" /H Include hexadecimal characters.\n"); printf(" /S Include space character.\n"); printf(" /V Do not include vowels.\n"); printf(" /X Exclude Similar characters e.g. (Il1O05S2Z)\n"); printf(" /N Include number each line.\n"); return 0; } //Get password length length = atoi(argv[1]); count = atoi(argv[2]); //Check password length if(length < MIN_PWS_LENGTH){ length = MIN_PWS_LENGTH; } //Max length of password is 255 if(length > MAX_PWS_LEN){ length = MAX_PWS_LEN; } //Check number of passwords. if(count < MIN_PWS_COUNT){ count = MIN_PWS_COUNT; } //Max passwords if(count > MAX_PASSWORDS){ count = MAX_PASSWORDS; } strcpy(pTempMask,""); //Add default password mask if no options are selected. if(argc == 3){ //Add default mask. strcat(pTempMask,pUppercase); strcat(pTempMask,pLowcase); strcat(pTempMask,pDigits); } //Create password mask while(x < argc){ //Get char from argv flag = toupper(argv[x][1]); //Check if flag is already in the flags array if(flag_exsits(flag) == FALSE && (isalpha(flag))){ //Store flag flags[i_flags] = flag; //INC flag counter i_flags++; } //INC counter x++; } //Reset counter i = 0; //Process flags while(i < i_flags){ //Get flag flag = flags[i]; //Process flag switch(flag){ case 'U': strcat(pTempMask,pUppercase); break; case 'L': strcat(pTempMask,pLowcase); break; case 'D': strcat(pTempMask,pDigits); break; case 'P': strcat(pTempMask,pPunctuation); break; case 'H': strcat(pTempMask,pHex); break; case 'S': strcat(pTempMask,sp); break; case 'V': rm_vowels = TRUE; break; case 'N': ln_No = TRUE; break; case 'X': Exclude_simlar = TRUE; break; } //INC counter i++; } i = 0; while(i < strlen(pTempMask)){ char ch = pTempMask[i]; //See if we need to remove vowels if(rm_vowels == TRUE){ if(is_vowel(ch) == FALSE){ pMask[pMaskLen] = ch; pMaskLen++; } } else{ //Just copy ch to pMask pMask[pMaskLen] = ch; //INC password length pMaskLen++; } i++; } //Add ending for password mask. pMask[pMaskLen] = '\0'; x = 0; i = 0; //Create passwords. while(i < count){ //Generate random password. for(j = 0; j < length;j++){ //Get random number. rnd = rand() % strlen(pMask); //Get random char from pMask c = pMask[rnd]; //Exclude similar characters. if(Exclude_simlar == TRUE){ while(c == 'I' || c == 'l' || c == '1' || c == 'O' || c == '0' || c == '5' || c == 'S' || c == '2' || c == 'Z'){ //Get random number rnd = rand() % strlen(pMask); //Get random char from pMask c = pMask[rnd]; } } //Build password pws[j] = c; } //Add ending for password. pws[j] = '\0'; //Check if numbering lines if(ln_No == TRUE){ //Print line number. printf("%04d ",(i + 1)); } //Print random password. printf("%s\n",pws); //INC counter i++; } //Clear arrays. memset(pTempMask,0,sizeof(pTempMask)); memset(pMask,0,sizeof(pMask)); memset(flags,0,sizeof(flags)); memset(pws,0,sizeof(pws)); return 0; }
Password options:Code:./bpwsgen 8 1 /u /l /d
/U Include upper case characters A-Z
/L Include lower case characters a-z
/D Include digits 0-9
/P Include punctuation and others.
/H Include hexadecimal characters.
/S Include space character.
/V Do not include vowels.
/X Exclude Similar characters e.g. (Il1O05S2Z)
/N Include number each line.
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