path: root/contrib/libs/openssl/apps/opt.c

/* 
 * Copyright 2015-2018 The OpenSSL Project Authors. All Rights Reserved. 
 * 
 * Licensed under the OpenSSL license (the "License").  You may not use 
 * this file except in compliance with the License.  You can obtain a copy 
 * in the file LICENSE in the source distribution or at 
 * https://www.openssl.org/source/license.html 
 */ 
#include "apps.h" 
#include <string.h> 
#if !defined(OPENSSL_SYS_MSDOS) 
# include OPENSSL_UNISTD 
#endif 
 
#include <stdlib.h> 
#include <errno.h> 
#include <ctype.h> 
#include <limits.h> 
#include <openssl/bio.h> 
#include <openssl/x509v3.h> 
 
#define MAX_OPT_HELP_WIDTH 30 
const char OPT_HELP_STR[] = "--"; 
const char OPT_MORE_STR[] = "---"; 
 
/* Our state */ 
static char **argv; 
static int argc; 
static int opt_index; 
static char *arg; 
static char *flag; 
static char *dunno; 
static const OPTIONS *unknown; 
static const OPTIONS *opts; 
static char prog[40]; 
 
/* 
 * Return the simple name of the program; removing various platform gunk. 
 */ 
#if defined(OPENSSL_SYS_WIN32) 
char *opt_progname(const char *argv0) 
{ 
    size_t i, n; 
    const char *p; 
    char *q; 
 
    /* find the last '/', '\' or ':' */ 
    for (p = argv0 + strlen(argv0); --p > argv0;) 
        if (*p == '/' || *p == '\\' || *p == ':') { 
            p++; 
            break; 
        } 
 
    /* Strip off trailing nonsense. */ 
    n = strlen(p); 
    if (n > 4 && 
        (strcmp(&p[n - 4], ".exe") == 0 || strcmp(&p[n - 4], ".EXE") == 0)) 
        n -= 4; 
 
    /* Copy over the name, in lowercase. */ 
    if (n > sizeof(prog) - 1) 
        n = sizeof(prog) - 1; 
    for (q = prog, i = 0; i < n; i++, p++) 
        *q++ = tolower((unsigned char)*p); 
    *q = '\0'; 
    return prog; 
} 
 
#elif defined(OPENSSL_SYS_VMS) 
 
char *opt_progname(const char *argv0) 
{ 
    const char *p, *q; 
 
    /* Find last special character sys:[foo.bar]openssl */ 
    for (p = argv0 + strlen(argv0); --p > argv0;) 
        if (*p == ':' || *p == ']' || *p == '>') { 
            p++; 
            break; 
        } 
 
    q = strrchr(p, '.'); 
    strncpy(prog, p, sizeof(prog) - 1); 
    prog[sizeof(prog) - 1] = '\0'; 
    if (q != NULL && q - p < sizeof(prog)) 
        prog[q - p] = '\0'; 
    return prog; 
} 
 
#else 
 
char *opt_progname(const char *argv0) 
{ 
    const char *p; 
 
    /* Could use strchr, but this is like the ones above. */ 
    for (p = argv0 + strlen(argv0); --p > argv0;) 
        if (*p == '/') { 
            p++; 
            break; 
        } 
    strncpy(prog, p, sizeof(prog) - 1); 
    prog[sizeof(prog) - 1] = '\0'; 
    return prog; 
} 
#endif 
 
char *opt_getprog(void) 
{ 
    return prog; 
} 
 
/* Set up the arg parsing. */ 
char *opt_init(int ac, char **av, const OPTIONS *o) 
{ 
    /* Store state. */ 
    argc = ac; 
    argv = av; 
    opt_index = 1; 
    opts = o; 
    opt_progname(av[0]); 
    unknown = NULL; 
 
    for (; o->name; ++o) { 
#ifndef NDEBUG 
        const OPTIONS *next; 
        int duplicated, i; 
#endif 
 
        if (o->name == OPT_HELP_STR || o->name == OPT_MORE_STR) 
            continue; 
#ifndef NDEBUG 
        i = o->valtype; 
 
        /* Make sure options are legit. */ 
        assert(o->name[0] != '-'); 
        assert(o->retval > 0); 
        switch (i) { 
        case   0: case '-': case '/': case '<': case '>': case 'E': case 'F': 
        case 'M': case 'U': case 'f': case 'l': case 'n': case 'p': case 's': 
        case 'u': case 'c': 
            break; 
        default: 
            assert(0); 
        } 
 
        /* Make sure there are no duplicates. */ 
        for (next = o + 1; next->name; ++next) { 
            /* 
             * Some compilers inline strcmp and the assert string is too long. 
             */ 
            duplicated = strcmp(o->name, next->name) == 0; 
            assert(!duplicated); 
        } 
#endif 
        if (o->name[0] == '\0') { 
            assert(unknown == NULL); 
            unknown = o; 
            assert(unknown->valtype == 0 || unknown->valtype == '-'); 
        } 
    } 
    return prog; 
} 
 
static OPT_PAIR formats[] = { 
    {"PEM/DER", OPT_FMT_PEMDER}, 
    {"pkcs12", OPT_FMT_PKCS12}, 
    {"smime", OPT_FMT_SMIME}, 
    {"engine", OPT_FMT_ENGINE}, 
    {"msblob", OPT_FMT_MSBLOB}, 
    {"nss", OPT_FMT_NSS}, 
    {"text", OPT_FMT_TEXT}, 
    {"http", OPT_FMT_HTTP}, 
    {"pvk", OPT_FMT_PVK}, 
    {NULL} 
}; 
 
/* Print an error message about a failed format parse. */ 
int opt_format_error(const char *s, unsigned long flags) 
{ 
    OPT_PAIR *ap; 
 
    if (flags == OPT_FMT_PEMDER) { 
        BIO_printf(bio_err, "%s: Bad format \"%s\"; must be pem or der\n", 
                   prog, s); 
    } else { 
        BIO_printf(bio_err, "%s: Bad format \"%s\"; must be one of:\n", 
                   prog, s); 
        for (ap = formats; ap->name; ap++) 
            if (flags & ap->retval) 
                BIO_printf(bio_err, "   %s\n", ap->name); 
    } 
    return 0; 
} 
 
/* Parse a format string, put it into *result; return 0 on failure, else 1. */ 
int opt_format(const char *s, unsigned long flags, int *result) 
{ 
    switch (*s) { 
    default: 
        return 0; 
    case 'D': 
    case 'd': 
        if ((flags & OPT_FMT_PEMDER) == 0) 
            return opt_format_error(s, flags); 
        *result = FORMAT_ASN1; 
        break; 
    case 'T': 
    case 't': 
        if ((flags & OPT_FMT_TEXT) == 0) 
            return opt_format_error(s, flags); 
        *result = FORMAT_TEXT; 
        break; 
    case 'N': 
    case 'n': 
        if ((flags & OPT_FMT_NSS) == 0) 
            return opt_format_error(s, flags); 
        if (strcmp(s, "NSS") != 0 && strcmp(s, "nss") != 0) 
            return opt_format_error(s, flags); 
        *result = FORMAT_NSS; 
        break; 
    case 'S': 
    case 's': 
        if ((flags & OPT_FMT_SMIME) == 0) 
            return opt_format_error(s, flags); 
        *result = FORMAT_SMIME; 
        break; 
    case 'M': 
    case 'm': 
        if ((flags & OPT_FMT_MSBLOB) == 0) 
            return opt_format_error(s, flags); 
        *result = FORMAT_MSBLOB; 
        break; 
    case 'E': 
    case 'e': 
        if ((flags & OPT_FMT_ENGINE) == 0) 
            return opt_format_error(s, flags); 
        *result = FORMAT_ENGINE; 
        break; 
    case 'H': 
    case 'h': 
        if ((flags & OPT_FMT_HTTP) == 0) 
            return opt_format_error(s, flags); 
        *result = FORMAT_HTTP; 
        break; 
    case '1': 
        if ((flags & OPT_FMT_PKCS12) == 0) 
            return opt_format_error(s, flags); 
        *result = FORMAT_PKCS12; 
        break; 
    case 'P': 
    case 'p': 
        if (s[1] == '\0' || strcmp(s, "PEM") == 0 || strcmp(s, "pem") == 0) { 
            if ((flags & OPT_FMT_PEMDER) == 0) 
                return opt_format_error(s, flags); 
            *result = FORMAT_PEM; 
        } else if (strcmp(s, "PVK") == 0 || strcmp(s, "pvk") == 0) { 
            if ((flags & OPT_FMT_PVK) == 0) 
                return opt_format_error(s, flags); 
            *result = FORMAT_PVK; 
        } else if (strcmp(s, "P12") == 0 || strcmp(s, "p12") == 0 
                   || strcmp(s, "PKCS12") == 0 || strcmp(s, "pkcs12") == 0) { 
            if ((flags & OPT_FMT_PKCS12) == 0) 
                return opt_format_error(s, flags); 
            *result = FORMAT_PKCS12; 
        } else { 
            return 0; 
        } 
        break; 
    } 
    return 1; 
} 
 
/* Parse a cipher name, put it in *EVP_CIPHER; return 0 on failure, else 1. */ 
int opt_cipher(const char *name, const EVP_CIPHER **cipherp) 
{ 
    *cipherp = EVP_get_cipherbyname(name); 
    if (*cipherp != NULL) 
        return 1; 
    BIO_printf(bio_err, "%s: Unrecognized flag %s\n", prog, name); 
    return 0; 
} 
 
/* 
 * Parse message digest name, put it in *EVP_MD; return 0 on failure, else 1. 
 */ 
int opt_md(const char *name, const EVP_MD **mdp) 
{ 
    *mdp = EVP_get_digestbyname(name); 
    if (*mdp != NULL) 
        return 1; 
    BIO_printf(bio_err, "%s: Unrecognized flag %s\n", prog, name); 
    return 0; 
} 
 
/* Look through a list of name/value pairs. */ 
int opt_pair(const char *name, const OPT_PAIR* pairs, int *result) 
{ 
    const OPT_PAIR *pp; 
 
    for (pp = pairs; pp->name; pp++) 
        if (strcmp(pp->name, name) == 0) { 
            *result = pp->retval; 
            return 1; 
        } 
    BIO_printf(bio_err, "%s: Value must be one of:\n", prog); 
    for (pp = pairs; pp->name; pp++) 
        BIO_printf(bio_err, "\t%s\n", pp->name); 
    return 0; 
} 
 
/* Parse an int, put it into *result; return 0 on failure, else 1. */ 
int opt_int(const char *value, int *result) 
{ 
    long l; 
 
    if (!opt_long(value, &l)) 
        return 0; 
    *result = (int)l; 
    if (*result != l) { 
        BIO_printf(bio_err, "%s: Value \"%s\" outside integer range\n", 
                   prog, value); 
        return 0; 
    } 
    return 1; 
} 
 
static void opt_number_error(const char *v) 
{ 
    size_t i = 0; 
    struct strstr_pair_st { 
        char *prefix; 
        char *name; 
    } b[] = { 
        {"0x", "a hexadecimal"}, 
        {"0X", "a hexadecimal"}, 
        {"0", "an octal"} 
    }; 
 
    for (i = 0; i < OSSL_NELEM(b); i++) { 
        if (strncmp(v, b[i].prefix, strlen(b[i].prefix)) == 0) { 
            BIO_printf(bio_err, 
                       "%s: Can't parse \"%s\" as %s number\n", 
                       prog, v, b[i].name); 
            return; 
        } 
    } 
    BIO_printf(bio_err, "%s: Can't parse \"%s\" as a number\n", prog, v); 
    return; 
} 
 
/* Parse a long, put it into *result; return 0 on failure, else 1. */ 
int opt_long(const char *value, long *result) 
{ 
    int oerrno = errno; 
    long l; 
    char *endp; 
 
    errno = 0; 
    l = strtol(value, &endp, 0); 
    if (*endp 
            || endp == value 
            || ((l == LONG_MAX || l == LONG_MIN) && errno == ERANGE) 
            || (l == 0 && errno != 0)) { 
        opt_number_error(value); 
        errno = oerrno; 
        return 0; 
    } 
    *result = l; 
    errno = oerrno; 
    return 1; 
} 
 
#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L && \ 
    defined(INTMAX_MAX) && defined(UINTMAX_MAX) 
 
/* Parse an intmax_t, put it into *result; return 0 on failure, else 1. */ 
int opt_imax(const char *value, intmax_t *result) 
{ 
    int oerrno = errno; 
    intmax_t m; 
    char *endp; 
 
    errno = 0; 
    m = strtoimax(value, &endp, 0); 
    if (*endp 
            || endp == value 
            || ((m == INTMAX_MAX || m == INTMAX_MIN) && errno == ERANGE) 
            || (m == 0 && errno != 0)) { 
        opt_number_error(value); 
        errno = oerrno; 
        return 0; 
    } 
    *result = m; 
    errno = oerrno; 
    return 1; 
} 
 
/* Parse a uintmax_t, put it into *result; return 0 on failure, else 1. */ 
int opt_umax(const char *value, uintmax_t *result) 
{ 
    int oerrno = errno; 
    uintmax_t m; 
    char *endp; 
 
    errno = 0; 
    m = strtoumax(value, &endp, 0); 
    if (*endp 
            || endp == value 
            || (m == UINTMAX_MAX && errno == ERANGE) 
            || (m == 0 && errno != 0)) { 
        opt_number_error(value); 
        errno = oerrno; 
        return 0; 
    } 
    *result = m; 
    errno = oerrno; 
    return 1; 
} 
#endif 
 
/* 
 * Parse an unsigned long, put it into *result; return 0 on failure, else 1. 
 */ 
int opt_ulong(const char *value, unsigned long *result) 
{ 
    int oerrno = errno; 
    char *endptr; 
    unsigned long l; 
 
    errno = 0; 
    l = strtoul(value, &endptr, 0); 
    if (*endptr 
            || endptr == value 
            || ((l == ULONG_MAX) && errno == ERANGE) 
            || (l == 0 && errno != 0)) { 
        opt_number_error(value); 
        errno = oerrno; 
        return 0; 
    } 
    *result = l; 
    errno = oerrno; 
    return 1; 
} 
 
/* 
 * We pass opt as an int but cast it to "enum range" so that all the 
 * items in the OPT_V_ENUM enumeration are caught; this makes -Wswitch 
 * in gcc do the right thing. 
 */ 
enum range { OPT_V_ENUM }; 
 
int opt_verify(int opt, X509_VERIFY_PARAM *vpm) 
{ 
    int i; 
    ossl_intmax_t t = 0; 
    ASN1_OBJECT *otmp; 
    X509_PURPOSE *xptmp; 
    const X509_VERIFY_PARAM *vtmp; 
 
    assert(vpm != NULL); 
    assert(opt > OPT_V__FIRST); 
    assert(opt < OPT_V__LAST); 
 
    switch ((enum range)opt) { 
    case OPT_V__FIRST: 
    case OPT_V__LAST: 
        return 0; 
    case OPT_V_POLICY: 
        otmp = OBJ_txt2obj(opt_arg(), 0); 
        if (otmp == NULL) { 
            BIO_printf(bio_err, "%s: Invalid Policy %s\n", prog, opt_arg()); 
            return 0; 
        } 
        X509_VERIFY_PARAM_add0_policy(vpm, otmp); 
        break; 
    case OPT_V_PURPOSE: 
        /* purpose name -> purpose index */ 
        i = X509_PURPOSE_get_by_sname(opt_arg()); 
        if (i < 0) { 
            BIO_printf(bio_err, "%s: Invalid purpose %s\n", prog, opt_arg()); 
            return 0; 
        } 
 
        /* purpose index -> purpose object */ 
        xptmp = X509_PURPOSE_get0(i); 
 
        /* purpose object -> purpose value */ 
        i = X509_PURPOSE_get_id(xptmp); 
 
        if (!X509_VERIFY_PARAM_set_purpose(vpm, i)) { 
            BIO_printf(bio_err, 
                       "%s: Internal error setting purpose %s\n", 
                       prog, opt_arg()); 
            return 0; 
        } 
        break; 
    case OPT_V_VERIFY_NAME: 
        vtmp = X509_VERIFY_PARAM_lookup(opt_arg()); 
        if (vtmp == NULL) { 
            BIO_printf(bio_err, "%s: Invalid verify name %s\n", 
                       prog, opt_arg()); 
            return 0; 
        } 
        X509_VERIFY_PARAM_set1(vpm, vtmp); 
        break; 
    case OPT_V_VERIFY_DEPTH: 
        i = atoi(opt_arg()); 
        if (i >= 0) 
            X509_VERIFY_PARAM_set_depth(vpm, i); 
        break; 
    case OPT_V_VERIFY_AUTH_LEVEL: 
        i = atoi(opt_arg()); 
        if (i >= 0) 
            X509_VERIFY_PARAM_set_auth_level(vpm, i); 
        break; 
    case OPT_V_ATTIME: 
        if (!opt_imax(opt_arg(), &t)) 
            return 0; 
        if (t != (time_t)t) { 
            BIO_printf(bio_err, "%s: epoch time out of range %s\n", 
                       prog, opt_arg()); 
            return 0; 
        } 
        X509_VERIFY_PARAM_set_time(vpm, (time_t)t); 
        break; 
    case OPT_V_VERIFY_HOSTNAME: 
        if (!X509_VERIFY_PARAM_set1_host(vpm, opt_arg(), 0)) 
            return 0; 
        break; 
    case OPT_V_VERIFY_EMAIL: 
        if (!X509_VERIFY_PARAM_set1_email(vpm, opt_arg(), 0)) 
            return 0; 
        break; 
    case OPT_V_VERIFY_IP: 
        if (!X509_VERIFY_PARAM_set1_ip_asc(vpm, opt_arg())) 
            return 0; 
        break; 
    case OPT_V_IGNORE_CRITICAL: 
        X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_IGNORE_CRITICAL); 
        break; 
    case OPT_V_ISSUER_CHECKS: 
        /* NOP, deprecated */ 
        break; 
    case OPT_V_CRL_CHECK: 
        X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_CRL_CHECK); 
        break; 
    case OPT_V_CRL_CHECK_ALL: 
        X509_VERIFY_PARAM_set_flags(vpm, 
                                    X509_V_FLAG_CRL_CHECK | 
                                    X509_V_FLAG_CRL_CHECK_ALL); 
        break; 
    case OPT_V_POLICY_CHECK: 
        X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_POLICY_CHECK); 
        break; 
    case OPT_V_EXPLICIT_POLICY: 
        X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_EXPLICIT_POLICY); 
        break; 
    case OPT_V_INHIBIT_ANY: 
        X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_INHIBIT_ANY); 
        break; 
    case OPT_V_INHIBIT_MAP: 
        X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_INHIBIT_MAP); 
        break; 
    case OPT_V_X509_STRICT: 
        X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_X509_STRICT); 
        break; 
    case OPT_V_EXTENDED_CRL: 
        X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_EXTENDED_CRL_SUPPORT); 
        break; 
    case OPT_V_USE_DELTAS: 
        X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_USE_DELTAS); 
        break; 
    case OPT_V_POLICY_PRINT: 
        X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_NOTIFY_POLICY); 
        break; 
    case OPT_V_CHECK_SS_SIG: 
        X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_CHECK_SS_SIGNATURE); 
        break; 
    case OPT_V_TRUSTED_FIRST: 
        X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_TRUSTED_FIRST); 
        break; 
    case OPT_V_SUITEB_128_ONLY: 
        X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_SUITEB_128_LOS_ONLY); 
        break; 
    case OPT_V_SUITEB_128: 
        X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_SUITEB_128_LOS); 
        break; 
    case OPT_V_SUITEB_192: 
        X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_SUITEB_192_LOS); 
        break; 
    case OPT_V_PARTIAL_CHAIN: 
        X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_PARTIAL_CHAIN); 
        break; 
    case OPT_V_NO_ALT_CHAINS: 
        X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_NO_ALT_CHAINS); 
        break; 
    case OPT_V_NO_CHECK_TIME: 
        X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_NO_CHECK_TIME); 
        break; 
    case OPT_V_ALLOW_PROXY_CERTS: 
        X509_VERIFY_PARAM_set_flags(vpm, X509_V_FLAG_ALLOW_PROXY_CERTS); 
        break; 
    } 
    return 1; 
 
} 
 
/* 
 * Parse the next flag (and value if specified), return 0 if done, -1 on 
 * error, otherwise the flag's retval. 
 */ 
int opt_next(void) 
{ 
    char *p; 
    const OPTIONS *o; 
    int ival; 
    long lval; 
    unsigned long ulval; 
    ossl_intmax_t imval; 
    ossl_uintmax_t umval; 
 
    /* Look at current arg; at end of the list? */ 
    arg = NULL; 
    p = argv[opt_index]; 
    if (p == NULL) 
        return 0; 
 
    /* If word doesn't start with a -, we're done. */ 
    if (*p != '-') 
        return 0; 
 
    /* Hit "--" ? We're done. */ 
    opt_index++; 
    if (strcmp(p, "--") == 0) 
        return 0; 
 
    /* Allow -nnn and --nnn */ 
    if (*++p == '-') 
        p++; 
    flag = p - 1; 
 
    /* If we have --flag=foo, snip it off */ 
    if ((arg = strchr(p, '=')) != NULL) 
        *arg++ = '\0'; 
    for (o = opts; o->name; ++o) { 
        /* If not this option, move on to the next one. */ 
        if (strcmp(p, o->name) != 0) 
            continue; 
 
        /* If it doesn't take a value, make sure none was given. */ 
        if (o->valtype == 0 || o->valtype == '-') { 
            if (arg) { 
                BIO_printf(bio_err, 
                           "%s: Option -%s does not take a value\n", prog, p); 
                return -1; 
            } 
            return o->retval; 
        } 
 
        /* Want a value; get the next param if =foo not used. */ 
        if (arg == NULL) { 
            if (argv[opt_index] == NULL) { 
                BIO_printf(bio_err, 
                           "%s: Option -%s needs a value\n", prog, o->name); 
                return -1; 
            } 
            arg = argv[opt_index++]; 
        } 
 
        /* Syntax-check value. */ 
        switch (o->valtype) { 
        default: 
        case 's': 
            /* Just a string. */ 
            break; 
        case '/': 
            if (app_isdir(arg) > 0) 
                break; 
            BIO_printf(bio_err, "%s: Not a directory: %s\n", prog, arg); 
            return -1; 
        case '<': 
            /* Input file. */ 
            break; 
        case '>': 
            /* Output file. */ 
            break; 
        case 'p': 
        case 'n': 
            if (!opt_int(arg, &ival) 
                    || (o->valtype == 'p' && ival <= 0)) { 
                BIO_printf(bio_err, 
                           "%s: Non-positive number \"%s\" for -%s\n", 
                           prog, arg, o->name); 
                return -1; 
            } 
            break; 
        case 'M': 
            if (!opt_imax(arg, &imval)) { 
                BIO_printf(bio_err, 
                           "%s: Invalid number \"%s\" for -%s\n", 
                           prog, arg, o->name); 
                return -1; 
            } 
            break; 
        case 'U': 
            if (!opt_umax(arg, &umval)) { 
                BIO_printf(bio_err, 
                           "%s: Invalid number \"%s\" for -%s\n", 
                           prog, arg, o->name); 
                return -1; 
            } 
            break; 
        case 'l': 
            if (!opt_long(arg, &lval)) { 
                BIO_printf(bio_err, 
                           "%s: Invalid number \"%s\" for -%s\n", 
                           prog, arg, o->name); 
                return -1; 
            } 
            break; 
        case 'u': 
            if (!opt_ulong(arg, &ulval)) { 
                BIO_printf(bio_err, 
                           "%s: Invalid number \"%s\" for -%s\n", 
                           prog, arg, o->name); 
                return -1; 
            } 
            break; 
        case 'c': 
        case 'E': 
        case 'F': 
        case 'f': 
            if (opt_format(arg, 
                           o->valtype == 'c' ? OPT_FMT_PDS : 
                           o->valtype == 'E' ? OPT_FMT_PDE : 
                           o->valtype == 'F' ? OPT_FMT_PEMDER 
                           : OPT_FMT_ANY, &ival)) 
                break; 
            BIO_printf(bio_err, 
                       "%s: Invalid format \"%s\" for -%s\n", 
                       prog, arg, o->name); 
            return -1; 
        } 
 
        /* Return the flag value. */ 
        return o->retval; 
    } 
    if (unknown != NULL) { 
        dunno = p; 
        return unknown->retval; 
    } 
    BIO_printf(bio_err, "%s: Option unknown option -%s\n", prog, p); 
    return -1; 
} 
 
/* Return the most recent flag parameter. */ 
char *opt_arg(void) 
{ 
    return arg; 
} 
 
/* Return the most recent flag. */ 
char *opt_flag(void) 
{ 
    return flag; 
} 
 
/* Return the unknown option. */ 
char *opt_unknown(void) 
{ 
    return dunno; 
} 
 
/* Return the rest of the arguments after parsing flags. */ 
char **opt_rest(void) 
{ 
    return &argv[opt_index]; 
} 
 
/* How many items in remaining args? */ 
int opt_num_rest(void) 
{ 
    int i = 0; 
    char **pp; 
 
    for (pp = opt_rest(); *pp; pp++, i++) 
        continue; 
    return i; 
} 
 
/* Return a string describing the parameter type. */ 
static const char *valtype2param(const OPTIONS *o) 
{ 
    switch (o->valtype) { 
    case 0: 
    case '-': 
        return ""; 
    case 's': 
        return "val"; 
    case '/': 
        return "dir"; 
    case '<': 
        return "infile"; 
    case '>': 
        return "outfile"; 
    case 'p': 
        return "+int"; 
    case 'n': 
        return "int"; 
    case 'l': 
        return "long"; 
    case 'u': 
        return "ulong"; 
    case 'E': 
        return "PEM|DER|ENGINE"; 
    case 'F': 
        return "PEM|DER"; 
    case 'f': 
        return "format"; 
    case 'M': 
        return "intmax"; 
    case 'U': 
        return "uintmax"; 
    } 
    return "parm"; 
} 
 
void opt_help(const OPTIONS *list) 
{ 
    const OPTIONS *o; 
    int i; 
    int standard_prolog; 
    int width = 5; 
    char start[80 + 1]; 
    char *p; 
    const char *help; 
 
    /* Starts with its own help message? */ 
    standard_prolog = list[0].name != OPT_HELP_STR; 
 
    /* Find the widest help. */ 
    for (o = list; o->name; o++) { 
        if (o->name == OPT_MORE_STR) 
            continue; 
        i = 2 + (int)strlen(o->name); 
        if (o->valtype != '-') 
            i += 1 + strlen(valtype2param(o)); 
        if (i < MAX_OPT_HELP_WIDTH && i > width) 
            width = i; 
        assert(i < (int)sizeof(start)); 
    } 
 
    if (standard_prolog) 
        BIO_printf(bio_err, "Usage: %s [options]\nValid options are:\n", 
                   prog); 
 
    /* Now let's print. */ 
    for (o = list; o->name; o++) { 
        help = o->helpstr ? o->helpstr : "(No additional info)"; 
        if (o->name == OPT_HELP_STR) { 
            BIO_printf(bio_err, help, prog); 
            continue; 
        } 
 
        /* Pad out prefix */ 
        memset(start, ' ', sizeof(start) - 1); 
        start[sizeof(start) - 1] = '\0'; 
 
        if (o->name == OPT_MORE_STR) { 
            /* Continuation of previous line; pad and print. */ 
            start[width] = '\0'; 
            BIO_printf(bio_err, "%s  %s\n", start, help); 
            continue; 
        } 
 
        /* Build up the "-flag [param]" part. */ 
        p = start; 
        *p++ = ' '; 
        *p++ = '-'; 
        if (o->name[0]) 
            p += strlen(strcpy(p, o->name)); 
        else 
            *p++ = '*'; 
        if (o->valtype != '-') { 
            *p++ = ' '; 
            p += strlen(strcpy(p, valtype2param(o))); 
        } 
        *p = ' '; 
        if ((int)(p - start) >= MAX_OPT_HELP_WIDTH) { 
            *p = '\0'; 
            BIO_printf(bio_err, "%s\n", start); 
            memset(start, ' ', sizeof(start)); 
        } 
        start[width] = '\0'; 
        BIO_printf(bio_err, "%s  %s\n", start, help); 
    } 
}