1/*
2 * Copyright 2006-2023 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License").  You may not use
5 * this file except in compliance with the License.  You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10#include "apps.h"
11#include "progs.h"
12#include <string.h>
13#include <openssl/err.h>
14#include <openssl/pem.h>
15#include <openssl/evp.h>
16#include <sys/stat.h>
17
18#define KEY_NONE        0
19#define KEY_PRIVKEY     1
20#define KEY_PUBKEY      2
21#define KEY_CERT        3
22
23static EVP_PKEY_CTX *init_ctx(const char *kdfalg, int *pkeysize,
24                              const char *keyfile, int keyform, int key_type,
25                              char *passinarg, int pkey_op, ENGINE *e,
26                              const int impl, int rawin, EVP_PKEY **ppkey,
27                              EVP_MD_CTX *mctx, const char *digestname,
28                              OSSL_LIB_CTX *libctx, const char *propq);
29
30static int setup_peer(EVP_PKEY_CTX *ctx, int peerform, const char *file,
31                      ENGINE *e);
32
33static int do_keyop(EVP_PKEY_CTX *ctx, int pkey_op,
34                    unsigned char *out, size_t *poutlen,
35                    const unsigned char *in, size_t inlen);
36
37static int do_raw_keyop(int pkey_op, EVP_MD_CTX *mctx,
38                        EVP_PKEY *pkey, BIO *in,
39                        int filesize, unsigned char *sig, int siglen,
40                        unsigned char **out, size_t *poutlen);
41
42typedef enum OPTION_choice {
43    OPT_COMMON,
44    OPT_ENGINE, OPT_ENGINE_IMPL, OPT_IN, OPT_OUT,
45    OPT_PUBIN, OPT_CERTIN, OPT_ASN1PARSE, OPT_HEXDUMP, OPT_SIGN,
46    OPT_VERIFY, OPT_VERIFYRECOVER, OPT_REV, OPT_ENCRYPT, OPT_DECRYPT,
47    OPT_DERIVE, OPT_SIGFILE, OPT_INKEY, OPT_PEERKEY, OPT_PASSIN,
48    OPT_PEERFORM, OPT_KEYFORM, OPT_PKEYOPT, OPT_PKEYOPT_PASSIN, OPT_KDF,
49    OPT_KDFLEN, OPT_R_ENUM, OPT_PROV_ENUM,
50    OPT_CONFIG,
51    OPT_RAWIN, OPT_DIGEST
52} OPTION_CHOICE;
53
54const OPTIONS pkeyutl_options[] = {
55    OPT_SECTION("General"),
56    {"help", OPT_HELP, '-', "Display this summary"},
57#ifndef OPENSSL_NO_ENGINE
58    {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
59    {"engine_impl", OPT_ENGINE_IMPL, '-',
60     "Also use engine given by -engine for crypto operations"},
61#endif
62    {"sign", OPT_SIGN, '-', "Sign input data with private key"},
63    {"verify", OPT_VERIFY, '-', "Verify with public key"},
64    {"encrypt", OPT_ENCRYPT, '-', "Encrypt input data with public key"},
65    {"decrypt", OPT_DECRYPT, '-', "Decrypt input data with private key"},
66    {"derive", OPT_DERIVE, '-', "Derive shared secret"},
67    OPT_CONFIG_OPTION,
68
69    OPT_SECTION("Input"),
70    {"in", OPT_IN, '<', "Input file - default stdin"},
71    {"rawin", OPT_RAWIN, '-', "Indicate the input data is in raw form"},
72    {"pubin", OPT_PUBIN, '-', "Input is a public key"},
73    {"inkey", OPT_INKEY, 's', "Input private key file"},
74    {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
75    {"peerkey", OPT_PEERKEY, 's', "Peer key file used in key derivation"},
76    {"peerform", OPT_PEERFORM, 'E', "Peer key format (DER/PEM/P12/ENGINE)"},
77    {"certin", OPT_CERTIN, '-', "Input is a cert with a public key"},
78    {"rev", OPT_REV, '-', "Reverse the order of the input buffer"},
79    {"sigfile", OPT_SIGFILE, '<', "Signature file (verify operation only)"},
80    {"keyform", OPT_KEYFORM, 'E', "Private key format (ENGINE, other values ignored)"},
81
82    OPT_SECTION("Output"),
83    {"out", OPT_OUT, '>', "Output file - default stdout"},
84    {"asn1parse", OPT_ASN1PARSE, '-', "asn1parse the output data"},
85    {"hexdump", OPT_HEXDUMP, '-', "Hex dump output"},
86    {"verifyrecover", OPT_VERIFYRECOVER, '-',
87     "Verify with public key, recover original data"},
88
89    OPT_SECTION("Signing/Derivation"),
90    {"digest", OPT_DIGEST, 's',
91     "Specify the digest algorithm when signing the raw input data"},
92    {"pkeyopt", OPT_PKEYOPT, 's', "Public key options as opt:value"},
93    {"pkeyopt_passin", OPT_PKEYOPT_PASSIN, 's',
94     "Public key option that is read as a passphrase argument opt:passphrase"},
95    {"kdf", OPT_KDF, 's', "Use KDF algorithm"},
96    {"kdflen", OPT_KDFLEN, 'p', "KDF algorithm output length"},
97
98    OPT_R_OPTIONS,
99    OPT_PROV_OPTIONS,
100    {NULL}
101};
102
103int pkeyutl_main(int argc, char **argv)
104{
105    CONF *conf = NULL;
106    BIO *in = NULL, *out = NULL;
107    ENGINE *e = NULL;
108    EVP_PKEY_CTX *ctx = NULL;
109    EVP_PKEY *pkey = NULL;
110    char *infile = NULL, *outfile = NULL, *sigfile = NULL, *passinarg = NULL;
111    char hexdump = 0, asn1parse = 0, rev = 0, *prog;
112    unsigned char *buf_in = NULL, *buf_out = NULL, *sig = NULL;
113    OPTION_CHOICE o;
114    int buf_inlen = 0, siglen = -1;
115    int keyform = FORMAT_UNDEF, peerform = FORMAT_UNDEF;
116    int keysize = -1, pkey_op = EVP_PKEY_OP_SIGN, key_type = KEY_PRIVKEY;
117    int engine_impl = 0;
118    int ret = 1, rv = -1;
119    size_t buf_outlen;
120    const char *inkey = NULL;
121    const char *peerkey = NULL;
122    const char *kdfalg = NULL, *digestname = NULL;
123    int kdflen = 0;
124    STACK_OF(OPENSSL_STRING) *pkeyopts = NULL;
125    STACK_OF(OPENSSL_STRING) *pkeyopts_passin = NULL;
126    int rawin = 0;
127    EVP_MD_CTX *mctx = NULL;
128    EVP_MD *md = NULL;
129    int filesize = -1;
130    OSSL_LIB_CTX *libctx = app_get0_libctx();
131
132    prog = opt_init(argc, argv, pkeyutl_options);
133    while ((o = opt_next()) != OPT_EOF) {
134        switch (o) {
135        case OPT_EOF:
136        case OPT_ERR:
137 opthelp:
138            BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
139            goto end;
140        case OPT_HELP:
141            opt_help(pkeyutl_options);
142            ret = 0;
143            goto end;
144        case OPT_IN:
145            infile = opt_arg();
146            break;
147        case OPT_OUT:
148            outfile = opt_arg();
149            break;
150        case OPT_SIGFILE:
151            sigfile = opt_arg();
152            break;
153        case OPT_ENGINE_IMPL:
154            engine_impl = 1;
155            break;
156        case OPT_INKEY:
157            inkey = opt_arg();
158            break;
159        case OPT_PEERKEY:
160            peerkey = opt_arg();
161            break;
162        case OPT_PASSIN:
163            passinarg = opt_arg();
164            break;
165        case OPT_PEERFORM:
166            if (!opt_format(opt_arg(), OPT_FMT_ANY, &peerform))
167                goto opthelp;
168            break;
169        case OPT_KEYFORM:
170            if (!opt_format(opt_arg(), OPT_FMT_ANY, &keyform))
171                goto opthelp;
172            break;
173        case OPT_R_CASES:
174            if (!opt_rand(o))
175                goto end;
176            break;
177        case OPT_CONFIG:
178            conf = app_load_config_modules(opt_arg());
179            if (conf == NULL)
180                goto end;
181            break;
182        case OPT_PROV_CASES:
183            if (!opt_provider(o))
184                goto end;
185            break;
186        case OPT_ENGINE:
187            e = setup_engine(opt_arg(), 0);
188            break;
189        case OPT_PUBIN:
190            key_type = KEY_PUBKEY;
191            break;
192        case OPT_CERTIN:
193            key_type = KEY_CERT;
194            break;
195        case OPT_ASN1PARSE:
196            asn1parse = 1;
197            break;
198        case OPT_HEXDUMP:
199            hexdump = 1;
200            break;
201        case OPT_SIGN:
202            pkey_op = EVP_PKEY_OP_SIGN;
203            break;
204        case OPT_VERIFY:
205            pkey_op = EVP_PKEY_OP_VERIFY;
206            break;
207        case OPT_VERIFYRECOVER:
208            pkey_op = EVP_PKEY_OP_VERIFYRECOVER;
209            break;
210        case OPT_ENCRYPT:
211            pkey_op = EVP_PKEY_OP_ENCRYPT;
212            break;
213        case OPT_DECRYPT:
214            pkey_op = EVP_PKEY_OP_DECRYPT;
215            break;
216        case OPT_DERIVE:
217            pkey_op = EVP_PKEY_OP_DERIVE;
218            break;
219        case OPT_KDF:
220            pkey_op = EVP_PKEY_OP_DERIVE;
221            key_type = KEY_NONE;
222            kdfalg = opt_arg();
223            break;
224        case OPT_KDFLEN:
225            kdflen = atoi(opt_arg());
226            break;
227        case OPT_REV:
228            rev = 1;
229            break;
230        case OPT_PKEYOPT:
231            if ((pkeyopts == NULL &&
232                 (pkeyopts = sk_OPENSSL_STRING_new_null()) == NULL) ||
233                sk_OPENSSL_STRING_push(pkeyopts, opt_arg()) == 0) {
234                BIO_puts(bio_err, "out of memory\n");
235                goto end;
236            }
237            break;
238        case OPT_PKEYOPT_PASSIN:
239            if ((pkeyopts_passin == NULL &&
240                 (pkeyopts_passin = sk_OPENSSL_STRING_new_null()) == NULL) ||
241                sk_OPENSSL_STRING_push(pkeyopts_passin, opt_arg()) == 0) {
242                BIO_puts(bio_err, "out of memory\n");
243                goto end;
244            }
245            break;
246        case OPT_RAWIN:
247            rawin = 1;
248            break;
249        case OPT_DIGEST:
250            digestname = opt_arg();
251            break;
252        }
253    }
254
255    /* No extra arguments. */
256    argc = opt_num_rest();
257    if (argc != 0)
258        goto opthelp;
259
260    if (!app_RAND_load())
261        goto end;
262
263    if (rawin && pkey_op != EVP_PKEY_OP_SIGN && pkey_op != EVP_PKEY_OP_VERIFY) {
264        BIO_printf(bio_err,
265                   "%s: -rawin can only be used with -sign or -verify\n",
266                   prog);
267        goto opthelp;
268    }
269
270    if (digestname != NULL && !rawin) {
271        BIO_printf(bio_err,
272                   "%s: -digest can only be used with -rawin\n",
273                   prog);
274        goto opthelp;
275    }
276
277    if (rawin && rev) {
278        BIO_printf(bio_err, "%s: -rev cannot be used with raw input\n",
279                   prog);
280        goto opthelp;
281    }
282
283    if (kdfalg != NULL) {
284        if (kdflen == 0) {
285            BIO_printf(bio_err,
286                       "%s: no KDF length given (-kdflen parameter).\n", prog);
287            goto opthelp;
288        }
289    } else if (inkey == NULL) {
290        BIO_printf(bio_err,
291                   "%s: no private key given (-inkey parameter).\n", prog);
292        goto opthelp;
293    } else if (peerkey != NULL && pkey_op != EVP_PKEY_OP_DERIVE) {
294        BIO_printf(bio_err,
295                   "%s: no peer key given (-peerkey parameter).\n", prog);
296        goto opthelp;
297    }
298
299    if (rawin) {
300        if ((mctx = EVP_MD_CTX_new()) == NULL) {
301            BIO_printf(bio_err, "Error: out of memory\n");
302            goto end;
303        }
304    }
305    ctx = init_ctx(kdfalg, &keysize, inkey, keyform, key_type,
306                   passinarg, pkey_op, e, engine_impl, rawin, &pkey,
307                   mctx, digestname, libctx, app_get0_propq());
308    if (ctx == NULL) {
309        BIO_printf(bio_err, "%s: Error initializing context\n", prog);
310        goto end;
311    }
312    if (peerkey != NULL && !setup_peer(ctx, peerform, peerkey, e)) {
313        BIO_printf(bio_err, "%s: Error setting up peer key\n", prog);
314        goto end;
315    }
316    if (pkeyopts != NULL) {
317        int num = sk_OPENSSL_STRING_num(pkeyopts);
318        int i;
319
320        for (i = 0; i < num; ++i) {
321            const char *opt = sk_OPENSSL_STRING_value(pkeyopts, i);
322
323            if (pkey_ctrl_string(ctx, opt) <= 0) {
324                BIO_printf(bio_err, "%s: Can't set parameter \"%s\":\n",
325                           prog, opt);
326                goto end;
327            }
328        }
329    }
330    if (pkeyopts_passin != NULL) {
331        int num = sk_OPENSSL_STRING_num(pkeyopts_passin);
332        int i;
333
334        for (i = 0; i < num; i++) {
335            char *opt = sk_OPENSSL_STRING_value(pkeyopts_passin, i);
336            char *passin = strchr(opt, ':');
337            char *passwd;
338
339            if (passin == NULL) {
340                /* Get password interactively */
341                char passwd_buf[4096];
342                int r;
343
344                BIO_snprintf(passwd_buf, sizeof(passwd_buf), "Enter %s: ", opt);
345                r = EVP_read_pw_string(passwd_buf, sizeof(passwd_buf) - 1,
346                                       passwd_buf, 0);
347                if (r < 0) {
348                    if (r == -2)
349                        BIO_puts(bio_err, "user abort\n");
350                    else
351                        BIO_puts(bio_err, "entry failed\n");
352                    goto end;
353                }
354                passwd = OPENSSL_strdup(passwd_buf);
355                if (passwd == NULL) {
356                    BIO_puts(bio_err, "out of memory\n");
357                    goto end;
358                }
359            } else {
360                /* Get password as a passin argument: First split option name
361                 * and passphrase argument into two strings */
362                *passin = 0;
363                passin++;
364                if (app_passwd(passin, NULL, &passwd, NULL) == 0) {
365                    BIO_printf(bio_err, "failed to get '%s'\n", opt);
366                    goto end;
367                }
368            }
369
370            if (EVP_PKEY_CTX_ctrl_str(ctx, opt, passwd) <= 0) {
371                BIO_printf(bio_err, "%s: Can't set parameter \"%s\":\n",
372                           prog, opt);
373                goto end;
374            }
375            OPENSSL_free(passwd);
376        }
377    }
378
379    if (sigfile != NULL && (pkey_op != EVP_PKEY_OP_VERIFY)) {
380        BIO_printf(bio_err,
381                   "%s: Signature file specified for non verify\n", prog);
382        goto end;
383    }
384
385    if (sigfile == NULL && (pkey_op == EVP_PKEY_OP_VERIFY)) {
386        BIO_printf(bio_err,
387                   "%s: No signature file specified for verify\n", prog);
388        goto end;
389    }
390
391    if (pkey_op != EVP_PKEY_OP_DERIVE) {
392        in = bio_open_default(infile, 'r', FORMAT_BINARY);
393        if (infile != NULL) {
394            struct stat st;
395
396            if (stat(infile, &st) == 0 && st.st_size <= INT_MAX)
397                filesize = (int)st.st_size;
398        }
399        if (in == NULL)
400            goto end;
401    }
402    out = bio_open_default(outfile, 'w', FORMAT_BINARY);
403    if (out == NULL)
404        goto end;
405
406    if (sigfile != NULL) {
407        BIO *sigbio = BIO_new_file(sigfile, "rb");
408
409        if (sigbio == NULL) {
410            BIO_printf(bio_err, "Can't open signature file %s\n", sigfile);
411            goto end;
412        }
413        siglen = bio_to_mem(&sig, keysize * 10, sigbio);
414        BIO_free(sigbio);
415        if (siglen < 0) {
416            BIO_printf(bio_err, "Error reading signature data\n");
417            goto end;
418        }
419    }
420
421    /* Raw input data is handled elsewhere */
422    if (in != NULL && !rawin) {
423        /* Read the input data */
424        buf_inlen = bio_to_mem(&buf_in, -1, in);
425        if (buf_inlen < 0) {
426            BIO_printf(bio_err, "Error reading input Data\n");
427            goto end;
428        }
429        if (rev) {
430            size_t i;
431            unsigned char ctmp;
432            size_t l = (size_t)buf_inlen;
433            for (i = 0; i < l / 2; i++) {
434                ctmp = buf_in[i];
435                buf_in[i] = buf_in[l - 1 - i];
436                buf_in[l - 1 - i] = ctmp;
437            }
438        }
439    }
440
441    /* Sanity check the input if the input is not raw */
442    if (!rawin
443            && buf_inlen > EVP_MAX_MD_SIZE
444            && (pkey_op == EVP_PKEY_OP_SIGN
445                || pkey_op == EVP_PKEY_OP_VERIFY)) {
446        BIO_printf(bio_err,
447                   "Error: The input data looks too long to be a hash\n");
448        goto end;
449    }
450
451    if (pkey_op == EVP_PKEY_OP_VERIFY) {
452        if (rawin) {
453            rv = do_raw_keyop(pkey_op, mctx, pkey, in, filesize, sig, siglen,
454                              NULL, 0);
455        } else {
456            rv = EVP_PKEY_verify(ctx, sig, (size_t)siglen,
457                                 buf_in, (size_t)buf_inlen);
458        }
459        if (rv == 1) {
460            BIO_puts(out, "Signature Verified Successfully\n");
461            ret = 0;
462        } else {
463            BIO_puts(out, "Signature Verification Failure\n");
464        }
465        goto end;
466    }
467    if (rawin) {
468        /* rawin allocates the buffer in do_raw_keyop() */
469        rv = do_raw_keyop(pkey_op, mctx, pkey, in, filesize, NULL, 0,
470                          &buf_out, (size_t *)&buf_outlen);
471    } else {
472        if (kdflen != 0) {
473            buf_outlen = kdflen;
474            rv = 1;
475        } else {
476            rv = do_keyop(ctx, pkey_op, NULL, (size_t *)&buf_outlen,
477                          buf_in, (size_t)buf_inlen);
478        }
479        if (rv > 0 && buf_outlen != 0) {
480            buf_out = app_malloc(buf_outlen, "buffer output");
481            rv = do_keyop(ctx, pkey_op,
482                          buf_out, (size_t *)&buf_outlen,
483                          buf_in, (size_t)buf_inlen);
484        }
485    }
486    if (rv <= 0) {
487        if (pkey_op != EVP_PKEY_OP_DERIVE) {
488            BIO_puts(bio_err, "Public Key operation error\n");
489        } else {
490            BIO_puts(bio_err, "Key derivation failed\n");
491        }
492        goto end;
493    }
494    ret = 0;
495
496    if (asn1parse) {
497        if (!ASN1_parse_dump(out, buf_out, buf_outlen, 1, -1))
498            ERR_print_errors(bio_err); /* but still return success */
499    } else if (hexdump) {
500        BIO_dump(out, (char *)buf_out, buf_outlen);
501    } else {
502        BIO_write(out, buf_out, buf_outlen);
503    }
504
505 end:
506    if (ret != 0)
507        ERR_print_errors(bio_err);
508    EVP_MD_CTX_free(mctx);
509    EVP_PKEY_CTX_free(ctx);
510    EVP_MD_free(md);
511    release_engine(e);
512    BIO_free(in);
513    BIO_free_all(out);
514    OPENSSL_free(buf_in);
515    OPENSSL_free(buf_out);
516    OPENSSL_free(sig);
517    sk_OPENSSL_STRING_free(pkeyopts);
518    sk_OPENSSL_STRING_free(pkeyopts_passin);
519    NCONF_free(conf);
520    return ret;
521}
522
523static EVP_PKEY_CTX *init_ctx(const char *kdfalg, int *pkeysize,
524                              const char *keyfile, int keyform, int key_type,
525                              char *passinarg, int pkey_op, ENGINE *e,
526                              const int engine_impl, int rawin,
527                              EVP_PKEY **ppkey, EVP_MD_CTX *mctx, const char *digestname,
528                              OSSL_LIB_CTX *libctx, const char *propq)
529{
530    EVP_PKEY *pkey = NULL;
531    EVP_PKEY_CTX *ctx = NULL;
532    ENGINE *impl = NULL;
533    char *passin = NULL;
534    int rv = -1;
535    X509 *x;
536
537    if (((pkey_op == EVP_PKEY_OP_SIGN) || (pkey_op == EVP_PKEY_OP_DECRYPT)
538         || (pkey_op == EVP_PKEY_OP_DERIVE))
539        && (key_type != KEY_PRIVKEY && kdfalg == NULL)) {
540        BIO_printf(bio_err, "A private key is needed for this operation\n");
541        goto end;
542    }
543    if (!app_passwd(passinarg, NULL, &passin, NULL)) {
544        BIO_printf(bio_err, "Error getting password\n");
545        goto end;
546    }
547    switch (key_type) {
548    case KEY_PRIVKEY:
549        pkey = load_key(keyfile, keyform, 0, passin, e, "private key");
550        break;
551
552    case KEY_PUBKEY:
553        pkey = load_pubkey(keyfile, keyform, 0, NULL, e, "public key");
554        break;
555
556    case KEY_CERT:
557        x = load_cert(keyfile, keyform, "Certificate");
558        if (x) {
559            pkey = X509_get_pubkey(x);
560            X509_free(x);
561        }
562        break;
563
564    case KEY_NONE:
565        break;
566
567    }
568
569#ifndef OPENSSL_NO_ENGINE
570    if (engine_impl)
571        impl = e;
572#endif
573
574    if (kdfalg != NULL) {
575        int kdfnid = OBJ_sn2nid(kdfalg);
576
577        if (kdfnid == NID_undef) {
578            kdfnid = OBJ_ln2nid(kdfalg);
579            if (kdfnid == NID_undef) {
580                BIO_printf(bio_err, "The given KDF \"%s\" is unknown.\n",
581                           kdfalg);
582                goto end;
583            }
584        }
585        if (impl != NULL)
586            ctx = EVP_PKEY_CTX_new_id(kdfnid, impl);
587        else
588            ctx = EVP_PKEY_CTX_new_from_name(libctx, kdfalg, propq);
589    } else {
590        if (pkey == NULL)
591            goto end;
592
593        *pkeysize = EVP_PKEY_get_size(pkey);
594        if (impl != NULL)
595            ctx = EVP_PKEY_CTX_new(pkey, impl);
596        else
597            ctx = EVP_PKEY_CTX_new_from_pkey(libctx, pkey, propq);
598        if (ppkey != NULL)
599            *ppkey = pkey;
600        EVP_PKEY_free(pkey);
601    }
602
603    if (ctx == NULL)
604        goto end;
605
606    if (rawin) {
607        EVP_MD_CTX_set_pkey_ctx(mctx, ctx);
608
609        switch (pkey_op) {
610        case EVP_PKEY_OP_SIGN:
611            rv = EVP_DigestSignInit_ex(mctx, NULL, digestname, libctx, propq,
612                                       pkey, NULL);
613            break;
614
615        case EVP_PKEY_OP_VERIFY:
616            rv = EVP_DigestVerifyInit_ex(mctx, NULL, digestname, libctx, propq,
617                                         pkey, NULL);
618            break;
619        }
620
621    } else {
622        switch (pkey_op) {
623        case EVP_PKEY_OP_SIGN:
624            rv = EVP_PKEY_sign_init(ctx);
625            break;
626
627        case EVP_PKEY_OP_VERIFY:
628            rv = EVP_PKEY_verify_init(ctx);
629            break;
630
631        case EVP_PKEY_OP_VERIFYRECOVER:
632            rv = EVP_PKEY_verify_recover_init(ctx);
633            break;
634
635        case EVP_PKEY_OP_ENCRYPT:
636            rv = EVP_PKEY_encrypt_init(ctx);
637            break;
638
639        case EVP_PKEY_OP_DECRYPT:
640            rv = EVP_PKEY_decrypt_init(ctx);
641            break;
642
643        case EVP_PKEY_OP_DERIVE:
644            rv = EVP_PKEY_derive_init(ctx);
645            break;
646        }
647    }
648
649    if (rv <= 0) {
650        EVP_PKEY_CTX_free(ctx);
651        ctx = NULL;
652    }
653
654 end:
655    OPENSSL_free(passin);
656    return ctx;
657
658}
659
660static int setup_peer(EVP_PKEY_CTX *ctx, int peerform, const char *file,
661                      ENGINE *e)
662{
663    EVP_PKEY *peer = NULL;
664    ENGINE *engine = NULL;
665    int ret;
666
667    if (peerform == FORMAT_ENGINE)
668        engine = e;
669    peer = load_pubkey(file, peerform, 0, NULL, engine, "peer key");
670    if (peer == NULL) {
671        BIO_printf(bio_err, "Error reading peer key %s\n", file);
672        return 0;
673    }
674
675    ret = EVP_PKEY_derive_set_peer(ctx, peer) > 0;
676
677    EVP_PKEY_free(peer);
678    return ret;
679}
680
681static int do_keyop(EVP_PKEY_CTX *ctx, int pkey_op,
682                    unsigned char *out, size_t *poutlen,
683                    const unsigned char *in, size_t inlen)
684{
685    int rv = 0;
686    switch (pkey_op) {
687    case EVP_PKEY_OP_VERIFYRECOVER:
688        rv = EVP_PKEY_verify_recover(ctx, out, poutlen, in, inlen);
689        break;
690
691    case EVP_PKEY_OP_SIGN:
692        rv = EVP_PKEY_sign(ctx, out, poutlen, in, inlen);
693        break;
694
695    case EVP_PKEY_OP_ENCRYPT:
696        rv = EVP_PKEY_encrypt(ctx, out, poutlen, in, inlen);
697        break;
698
699    case EVP_PKEY_OP_DECRYPT:
700        rv = EVP_PKEY_decrypt(ctx, out, poutlen, in, inlen);
701        break;
702
703    case EVP_PKEY_OP_DERIVE:
704        rv = EVP_PKEY_derive(ctx, out, poutlen);
705        break;
706
707    }
708    return rv;
709}
710
711#define TBUF_MAXSIZE 2048
712
713static int do_raw_keyop(int pkey_op, EVP_MD_CTX *mctx,
714                        EVP_PKEY *pkey, BIO *in,
715                        int filesize, unsigned char *sig, int siglen,
716                        unsigned char **out, size_t *poutlen)
717{
718    int rv = 0;
719    unsigned char tbuf[TBUF_MAXSIZE];
720    unsigned char *mbuf = NULL;
721    int buf_len = 0;
722
723    /* Some algorithms only support oneshot digests */
724    if (EVP_PKEY_get_id(pkey) == EVP_PKEY_ED25519
725            || EVP_PKEY_get_id(pkey) == EVP_PKEY_ED448) {
726        if (filesize < 0) {
727            BIO_printf(bio_err,
728                       "Error: unable to determine file size for oneshot operation\n");
729            goto end;
730        }
731        mbuf = app_malloc(filesize, "oneshot sign/verify buffer");
732        switch(pkey_op) {
733        case EVP_PKEY_OP_VERIFY:
734            buf_len = BIO_read(in, mbuf, filesize);
735            if (buf_len != filesize) {
736                BIO_printf(bio_err, "Error reading raw input data\n");
737                goto end;
738            }
739            rv = EVP_DigestVerify(mctx, sig, (size_t)siglen, mbuf, buf_len);
740            break;
741        case EVP_PKEY_OP_SIGN:
742            buf_len = BIO_read(in, mbuf, filesize);
743            if (buf_len != filesize) {
744                BIO_printf(bio_err, "Error reading raw input data\n");
745                goto end;
746            }
747            rv = EVP_DigestSign(mctx, NULL, poutlen, mbuf, buf_len);
748            if (rv == 1 && out != NULL) {
749                *out = app_malloc(*poutlen, "buffer output");
750                rv = EVP_DigestSign(mctx, *out, poutlen, mbuf, buf_len);
751            }
752            break;
753        }
754        goto end;
755    }
756
757    switch(pkey_op) {
758    case EVP_PKEY_OP_VERIFY:
759        for (;;) {
760            buf_len = BIO_read(in, tbuf, TBUF_MAXSIZE);
761            if (buf_len == 0)
762                break;
763            if (buf_len < 0) {
764                BIO_printf(bio_err, "Error reading raw input data\n");
765                goto end;
766            }
767            rv = EVP_DigestVerifyUpdate(mctx, tbuf, (size_t)buf_len);
768            if (rv != 1) {
769                BIO_printf(bio_err, "Error verifying raw input data\n");
770                goto end;
771            }
772        }
773        rv = EVP_DigestVerifyFinal(mctx, sig, (size_t)siglen);
774        break;
775    case EVP_PKEY_OP_SIGN:
776        for (;;) {
777            buf_len = BIO_read(in, tbuf, TBUF_MAXSIZE);
778            if (buf_len == 0)
779                break;
780            if (buf_len < 0) {
781                BIO_printf(bio_err, "Error reading raw input data\n");
782                goto end;
783            }
784            rv = EVP_DigestSignUpdate(mctx, tbuf, (size_t)buf_len);
785            if (rv != 1) {
786                BIO_printf(bio_err, "Error signing raw input data\n");
787                goto end;
788            }
789        }
790        rv = EVP_DigestSignFinal(mctx, NULL, poutlen);
791        if (rv == 1 && out != NULL) {
792            *out = app_malloc(*poutlen, "buffer output");
793            rv = EVP_DigestSignFinal(mctx, *out, poutlen);
794        }
795        break;
796    }
797
798 end:
799    OPENSSL_free(mbuf);
800    return rv;
801}
802