1/*
2 * Demo of how to construct your own engine and using it.  The basis of this
3 * engine is RSAref, an old reference of the RSA algorithm which can still be
4 * found a little here and there.
5 */
6
7#include <stdio.h>
8#include <string.h>
9#include "./source/global.h"
10#include "./source/rsaref.h"
11#include "./source/rsa.h"
12#include "./source/des.h"
13#include <openssl/err.h>
14#define OPENSSL_NO_MD2
15#define OPENSSL_NO_MD5
16#include <openssl/evp.h>
17#include <openssl/bn.h>
18#include <openssl/engine.h>
19
20#define RSAREF_LIB_NAME "rsaref engine"
21#include "rsaref_err.c"
22
23/*****************************************************************************
24 *** Function declarations and global variable definitions                 ***
25 *****************************************************************************/
26
27/*****************************************************************************
28 * Constants used when creating the ENGINE
29 **/
30static const char *engine_rsaref_id = "rsaref";
31static const char *engine_rsaref_name = "RSAref engine support";
32
33/*****************************************************************************
34 * Functions to handle the engine
35 **/
36static int rsaref_destroy(ENGINE *e);
37static int rsaref_init(ENGINE *e);
38static int rsaref_finish(ENGINE *e);
39#if 0
40static int rsaref_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f) ());
41#endif
42
43/*****************************************************************************
44 * Engine commands
45 **/
46static const ENGINE_CMD_DEFN rsaref_cmd_defns[] = {
47    {0, NULL, NULL, 0}
48};
49
50/*****************************************************************************
51 * RSA functions
52 **/
53static int rsaref_private_decrypt(int len, const unsigned char *from,
54                                  unsigned char *to, RSA *rsa, int padding);
55static int rsaref_private_encrypt(int len, const unsigned char *from,
56                                  unsigned char *to, RSA *rsa, int padding);
57static int rsaref_public_encrypt(int len, const unsigned char *from,
58                                 unsigned char *to, RSA *rsa, int padding);
59static int rsaref_public_decrypt(int len, const unsigned char *from,
60                                 unsigned char *to, RSA *rsa, int padding);
61static int bnref_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
62                         const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
63static int rsaref_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa);
64
65/*****************************************************************************
66 * Our RSA method
67 **/
68static RSA_METHOD rsaref_rsa = {
69    "RSAref PKCS#1 RSA",
70    rsaref_public_encrypt,
71    rsaref_public_decrypt,
72    rsaref_private_encrypt,
73    rsaref_private_decrypt,
74    rsaref_mod_exp,
75    bnref_mod_exp,
76    NULL,
77    NULL,
78    0,
79    NULL,
80    NULL,
81    NULL
82};
83
84/*****************************************************************************
85 * Symetric cipher and digest function registrars
86 **/
87static int rsaref_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
88                          const int **nids, int nid);
89static int rsaref_digests(ENGINE *e, const EVP_MD **digest,
90                          const int **nids, int nid);
91
92static int rsaref_cipher_nids[] =
93    { NID_des_cbc, NID_des_ede3_cbc, NID_desx_cbc, 0 };
94static int rsaref_digest_nids[] = { NID_md2, NID_md5, 0 };
95
96/*****************************************************************************
97 * DES functions
98 **/
99static int cipher_des_cbc_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
100                               const unsigned char *iv, int enc);
101static int cipher_des_cbc_code(EVP_CIPHER_CTX *ctx, unsigned char *out,
102                               const unsigned char *in, unsigned int inl);
103static int cipher_des_cbc_clean(EVP_CIPHER_CTX *);
104static int cipher_des_ede3_cbc_init(EVP_CIPHER_CTX *ctx,
105                                    const unsigned char *key,
106                                    const unsigned char *iv, int enc);
107static int cipher_des_ede3_cbc_code(EVP_CIPHER_CTX *ctx, unsigned char *out,
108                                    const unsigned char *in,
109                                    unsigned int inl);
110static int cipher_des_ede3_cbc_clean(EVP_CIPHER_CTX *);
111static int cipher_desx_cbc_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
112                                const unsigned char *iv, int enc);
113static int cipher_desx_cbc_code(EVP_CIPHER_CTX *ctx, unsigned char *out,
114                                const unsigned char *in, unsigned int inl);
115static int cipher_desx_cbc_clean(EVP_CIPHER_CTX *);
116
117/*****************************************************************************
118 * Our DES ciphers
119 **/
120static const EVP_CIPHER cipher_des_cbc = {
121    NID_des_cbc,
122    8, 8, 8,
123    0 | EVP_CIPH_CBC_MODE,
124    cipher_des_cbc_init,
125    cipher_des_cbc_code,
126    cipher_des_cbc_clean,
127    sizeof(DES_CBC_CTX),
128    NULL,
129    NULL,
130    NULL,
131    NULL
132};
133
134static const EVP_CIPHER cipher_des_ede3_cbc = {
135    NID_des_ede3_cbc,
136    8, 24, 8,
137    0 | EVP_CIPH_CBC_MODE,
138    cipher_des_ede3_cbc_init,
139    cipher_des_ede3_cbc_code,
140    cipher_des_ede3_cbc_clean,
141    sizeof(DES3_CBC_CTX),
142    NULL,
143    NULL,
144    NULL,
145    NULL
146};
147
148static const EVP_CIPHER cipher_desx_cbc = {
149    NID_desx_cbc,
150    8, 24, 8,
151    0 | EVP_CIPH_CBC_MODE,
152    cipher_desx_cbc_init,
153    cipher_desx_cbc_code,
154    cipher_desx_cbc_clean,
155    sizeof(DESX_CBC_CTX),
156    NULL,
157    NULL,
158    NULL,
159    NULL
160};
161
162/*****************************************************************************
163 * MD functions
164 **/
165static int digest_md2_init(EVP_MD_CTX *ctx);
166static int digest_md2_update(EVP_MD_CTX *ctx, const void *data,
167                             unsigned long count);
168static int digest_md2_final(EVP_MD_CTX *ctx, unsigned char *md);
169static int digest_md5_init(EVP_MD_CTX *ctx);
170static int digest_md5_update(EVP_MD_CTX *ctx, const void *data,
171                             unsigned long count);
172static int digest_md5_final(EVP_MD_CTX *ctx, unsigned char *md);
173
174/*****************************************************************************
175 * Our MD digests
176 **/
177static const EVP_MD digest_md2 = {
178    NID_md2,
179    NID_md2WithRSAEncryption,
180    16,
181    0,
182    digest_md2_init,
183    digest_md2_update,
184    digest_md2_final,
185    NULL,
186    NULL,
187    EVP_PKEY_RSA_method,
188    16,
189    sizeof(MD2_CTX)
190};
191
192static const EVP_MD digest_md5 = {
193    NID_md5,
194    NID_md5WithRSAEncryption,
195    16,
196    0,
197    digest_md5_init,
198    digest_md5_update,
199    digest_md5_final,
200    NULL,
201    NULL,
202    EVP_PKEY_RSA_method,
203    64,
204    sizeof(MD5_CTX)
205};
206
207/*****************************************************************************
208 *** Function definitions                                                  ***
209 *****************************************************************************/
210
211/*****************************************************************************
212 * Functions to handle the engine
213 **/
214
215static int bind_rsaref(ENGINE *e)
216{
217    const RSA_METHOD *meth1;
218    if (!ENGINE_set_id(e, engine_rsaref_id)
219        || !ENGINE_set_name(e, engine_rsaref_name)
220        || !ENGINE_set_RSA(e, &rsaref_rsa)
221        || !ENGINE_set_ciphers(e, rsaref_ciphers)
222        || !ENGINE_set_digests(e, rsaref_digests)
223        || !ENGINE_set_destroy_function(e, rsaref_destroy)
224        || !ENGINE_set_init_function(e, rsaref_init)
225        || !ENGINE_set_finish_function(e, rsaref_finish)
226        /* || !ENGINE_set_ctrl_function(e, rsaref_ctrl) */
227        /*
228         * || !ENGINE_set_cmd_defns(e, rsaref_cmd_defns)
229         */ )
230        return 0;
231
232    /* Ensure the rsaref error handling is set up */
233    ERR_load_RSAREF_strings();
234    return 1;
235}
236
237#ifdef ENGINE_DYNAMIC_SUPPORT
238static int bind_helper(ENGINE *e, const char *id)
239{
240    if (id && (strcmp(id, engine_rsaref_id) != 0))
241        return 0;
242    if (!bind_rsaref(e))
243        return 0;
244    return 1;
245}
246
247IMPLEMENT_DYNAMIC_CHECK_FN()
248    IMPLEMENT_DYNAMIC_BIND_FN(bind_helper)
249#else
250static ENGINE *engine_rsaref(void)
251{
252    ENGINE *ret = ENGINE_new();
253    if (!ret)
254        return NULL;
255    if (!bind_rsaref(ret)) {
256        ENGINE_free(ret);
257        return NULL;
258    }
259    return ret;
260}
261
262void ENGINE_load_rsaref(void)
263{
264    /* Copied from eng_[openssl|dyn].c */
265    ENGINE *toadd = engine_rsaref();
266    if (!toadd)
267        return;
268    ENGINE_add(toadd);
269    ENGINE_free(toadd);
270    ERR_clear_error();
271}
272#endif
273
274/* Initiator which is only present to make sure this engine looks available */
275static int rsaref_init(ENGINE *e)
276{
277    return 1;
278}
279
280/* Finisher which is only present to make sure this engine looks available */
281static int rsaref_finish(ENGINE *e)
282{
283    return 1;
284}
285
286/* Destructor (complements the "ENGINE_ncipher()" constructor) */
287static int rsaref_destroy(ENGINE *e)
288{
289    ERR_unload_RSAREF_strings();
290    return 1;
291}
292
293/*****************************************************************************
294 * RSA functions
295 **/
296
297static int rsaref_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa)
298{
299    RSAREFerr(RSAREF_F_RSAREF_MOD_EXP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
300    return (0);
301}
302
303static int bnref_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
304                         const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
305{
306    RSAREFerr(RSAREF_F_BNREF_MOD_EXP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
307    return (0);
308}
309
310/* unsigned char *to:  [max]    */
311static int RSAref_bn2bin(BIGNUM *from, unsigned char *to, int max)
312{
313    int i;
314
315    i = BN_num_bytes(from);
316    if (i > max) {
317        RSAREFerr(RSAREF_F_RSAREF_BN2BIN, RSAREF_R_LEN);
318        return (0);
319    }
320
321    memset(to, 0, (unsigned int)max);
322    if (!BN_bn2bin(from, &(to[max - i])))
323        return (0);
324    return (1);
325}
326
327#ifdef undef
328/* unsigned char *from:  [max]    */
329static BIGNUM *RSAref_bin2bn(unsigned char *from, BIGNUM *to, int max)
330{
331    int i;
332    BIGNUM *ret;
333
334    for (i = 0; i < max; i++)
335        if (from[i])
336            break;
337
338    ret = BN_bin2bn(&(from[i]), max - i, to);
339    return (ret);
340}
341
342static int RSAref_Public_ref2eay(RSArefPublicKey * from, RSA *to)
343{
344    to->n = RSAref_bin2bn(from->m, NULL, RSAref_MAX_LEN);
345    to->e = RSAref_bin2bn(from->e, NULL, RSAref_MAX_LEN);
346    if ((to->n == NULL) || (to->e == NULL))
347        return (0);
348    return (1);
349}
350#endif
351
352static int RSAref_Public_eay2ref(RSA *from, R_RSA_PUBLIC_KEY * to)
353{
354    to->bits = BN_num_bits(from->n);
355    if (!RSAref_bn2bin(from->n, to->modulus, MAX_RSA_MODULUS_LEN))
356        return (0);
357    if (!RSAref_bn2bin(from->e, to->exponent, MAX_RSA_MODULUS_LEN))
358        return (0);
359    return (1);
360}
361
362#ifdef undef
363static int RSAref_Private_ref2eay(RSArefPrivateKey * from, RSA *to)
364{
365    if ((to->n = RSAref_bin2bn(from->m, NULL, RSAref_MAX_LEN)) == NULL)
366        return (0);
367    if ((to->e = RSAref_bin2bn(from->e, NULL, RSAref_MAX_LEN)) == NULL)
368        return (0);
369    if ((to->d = RSAref_bin2bn(from->d, NULL, RSAref_MAX_LEN)) == NULL)
370        return (0);
371    if ((to->p =
372         RSAref_bin2bn(from->prime[0], NULL, RSAref_MAX_PLEN)) == NULL)
373        return (0);
374    if ((to->q =
375         RSAref_bin2bn(from->prime[1], NULL, RSAref_MAX_PLEN)) == NULL)
376        return (0);
377    if ((to->dmp1 = RSAref_bin2bn(from->pexp[0], NULL, RSAref_MAX_PLEN))
378        == NULL)
379        return (0);
380    if ((to->dmq1 = RSAref_bin2bn(from->pexp[1], NULL, RSAref_MAX_PLEN))
381        == NULL)
382        return (0);
383    if ((to->iqmp = RSAref_bin2bn(from->coef, NULL, RSAref_MAX_PLEN)) == NULL)
384        return (0);
385    return (1);
386}
387#endif
388
389static int RSAref_Private_eay2ref(RSA *from, R_RSA_PRIVATE_KEY * to)
390{
391    to->bits = BN_num_bits(from->n);
392    if (!RSAref_bn2bin(from->n, to->modulus, MAX_RSA_MODULUS_LEN))
393        return (0);
394    if (!RSAref_bn2bin(from->e, to->publicExponent, MAX_RSA_MODULUS_LEN))
395        return (0);
396    if (!RSAref_bn2bin(from->d, to->exponent, MAX_RSA_MODULUS_LEN))
397        return (0);
398    if (!RSAref_bn2bin(from->p, to->prime[0], MAX_RSA_PRIME_LEN))
399        return (0);
400    if (!RSAref_bn2bin(from->q, to->prime[1], MAX_RSA_PRIME_LEN))
401        return (0);
402    if (!RSAref_bn2bin(from->dmp1, to->primeExponent[0], MAX_RSA_PRIME_LEN))
403        return (0);
404    if (!RSAref_bn2bin(from->dmq1, to->primeExponent[1], MAX_RSA_PRIME_LEN))
405        return (0);
406    if (!RSAref_bn2bin(from->iqmp, to->coefficient, MAX_RSA_PRIME_LEN))
407        return (0);
408    return (1);
409}
410
411static int rsaref_private_decrypt(int len, const unsigned char *from,
412                                  unsigned char *to, RSA *rsa, int padding)
413{
414    int i, outlen = -1;
415    R_RSA_PRIVATE_KEY RSAkey;
416
417    if (!RSAref_Private_eay2ref(rsa, &RSAkey))
418        goto err;
419    if ((i =
420         RSAPrivateDecrypt(to, (unsigned int *)&outlen, (unsigned char *)from,
421                           len, &RSAkey)) != 0) {
422        RSAREFerr(RSAREF_F_RSAREF_PRIVATE_DECRYPT, i);
423        outlen = -1;
424    }
425 err:
426    memset(&RSAkey, 0, sizeof(RSAkey));
427    return (outlen);
428}
429
430static int rsaref_private_encrypt(int len, const unsigned char *from,
431                                  unsigned char *to, RSA *rsa, int padding)
432{
433    int i, outlen = -1;
434    R_RSA_PRIVATE_KEY RSAkey;
435
436    if (padding != RSA_PKCS1_PADDING) {
437        RSAREFerr(RSAREF_F_RSAREF_PRIVATE_ENCRYPT,
438                  RSA_R_UNKNOWN_PADDING_TYPE);
439        goto err;
440    }
441    if (!RSAref_Private_eay2ref(rsa, &RSAkey))
442        goto err;
443    if ((i =
444         RSAPrivateEncrypt(to, (unsigned int *)&outlen, (unsigned char *)from,
445                           len, &RSAkey)) != 0) {
446        RSAREFerr(RSAREF_F_RSAREF_PRIVATE_ENCRYPT, i);
447        outlen = -1;
448    }
449 err:
450    memset(&RSAkey, 0, sizeof(RSAkey));
451    return (outlen);
452}
453
454static int rsaref_public_decrypt(int len, const unsigned char *from,
455                                 unsigned char *to, RSA *rsa, int padding)
456{
457    int i, outlen = -1;
458    R_RSA_PUBLIC_KEY RSAkey;
459
460    if (!RSAref_Public_eay2ref(rsa, &RSAkey))
461        goto err;
462    if ((i =
463         RSAPublicDecrypt(to, (unsigned int *)&outlen, (unsigned char *)from,
464                          len, &RSAkey)) != 0) {
465        RSAREFerr(RSAREF_F_RSAREF_PUBLIC_DECRYPT, i);
466        outlen = -1;
467    }
468 err:
469    memset(&RSAkey, 0, sizeof(RSAkey));
470    return (outlen);
471}
472
473static int rsaref_public_encrypt(int len, const unsigned char *from,
474                                 unsigned char *to, RSA *rsa, int padding)
475{
476    int outlen = -1;
477    int i;
478    R_RSA_PUBLIC_KEY RSAkey;
479    R_RANDOM_STRUCT rnd;
480    unsigned char buf[16];
481
482    if (padding != RSA_PKCS1_PADDING && padding != RSA_SSLV23_PADDING) {
483        RSAREFerr(RSAREF_F_RSAREF_PUBLIC_ENCRYPT, RSA_R_UNKNOWN_PADDING_TYPE);
484        goto err;
485    }
486
487    R_RandomInit(&rnd);
488    R_GetRandomBytesNeeded((unsigned int *)&i, &rnd);
489    while (i > 0) {
490        if (RAND_bytes(buf, 16) <= 0)
491            goto err;
492        R_RandomUpdate(&rnd, buf, (unsigned int)((i > 16) ? 16 : i));
493        i -= 16;
494    }
495
496    if (!RSAref_Public_eay2ref(rsa, &RSAkey))
497        goto err;
498    if ((i =
499         RSAPublicEncrypt(to, (unsigned int *)&outlen, (unsigned char *)from,
500                          len, &RSAkey, &rnd)) != 0) {
501        RSAREFerr(RSAREF_F_RSAREF_PUBLIC_ENCRYPT, i);
502        outlen = -1;
503        goto err;
504    }
505 err:
506    memset(&RSAkey, 0, sizeof(RSAkey));
507    R_RandomFinal(&rnd);
508    memset(&rnd, 0, sizeof(rnd));
509    return (outlen);
510}
511
512/*****************************************************************************
513 * Symetric cipher and digest function registrars
514 **/
515static int rsaref_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
516                          const int **nids, int nid)
517{
518    int ok = 1;
519    if (!cipher) {
520        /* We are returning a list of supported nids */
521        *nids = rsaref_cipher_nids;
522        return (sizeof(rsaref_cipher_nids) -
523                1) / sizeof(rsaref_cipher_nids[0]);
524    }
525    /* We are being asked for a specific cipher */
526    switch (nid) {
527    case NID_des_cbc:
528        *cipher = &cipher_des_cbc;
529        break;
530    case NID_des_ede3_cbc:
531        *cipher = &cipher_des_ede3_cbc;
532        break;
533    case NID_desx_cbc:
534        *cipher = &cipher_desx_cbc;
535        break;
536    default:
537        ok = 0;
538        *cipher = NULL;
539        break;
540    }
541    return ok;
542}
543
544static int rsaref_digests(ENGINE *e, const EVP_MD **digest,
545                          const int **nids, int nid)
546{
547    int ok = 1;
548    if (!digest) {
549        /* We are returning a list of supported nids */
550        *nids = rsaref_digest_nids;
551        return (sizeof(rsaref_digest_nids) -
552                1) / sizeof(rsaref_digest_nids[0]);
553    }
554    /* We are being asked for a specific digest */
555    switch (nid) {
556    case NID_md2:
557        *digest = &digest_md2;
558        break;
559    case NID_md5:
560        *digest = &digest_md5;
561        break;
562    default:
563        ok = 0;
564        *digest = NULL;
565        break;
566    }
567    return ok;
568}
569
570/*****************************************************************************
571 * DES functions
572 **/
573#undef data
574#define data(ctx) ((DES_CBC_CTX *)(ctx)->cipher_data)
575static int cipher_des_cbc_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
576                               const unsigned char *iv, int enc)
577{
578    DES_CBCInit(data(ctx), (unsigned char *)key, (unsigned char *)iv, enc);
579    return 1;
580}
581
582static int cipher_des_cbc_code(EVP_CIPHER_CTX *ctx, unsigned char *out,
583                               const unsigned char *in, unsigned int inl)
584{
585    int ret = DES_CBCUpdate(data(ctx), out, (unsigned char *)in, inl);
586    switch (ret) {
587    case RE_LEN:
588        RSAREFerr(RSAREF_F_CIPHER_DES_CBC_CODE,
589                  RSAREF_R_LENGTH_NOT_BLOCK_ALIGNED);
590        break;
591    case 0:
592        break;
593    default:
594        RSAREFerr(RSAREF_F_CIPHER_DES_CBC_CODE, RSAREF_R_UNKNOWN_FAULT);
595    }
596    return !ret;
597}
598
599static int cipher_des_cbc_clean(EVP_CIPHER_CTX *ctx)
600{
601    memset(data(ctx), 0, ctx->cipher->ctx_size);
602    return 1;
603}
604
605#undef data
606#define data(ctx) ((DES3_CBC_CTX *)(ctx)->cipher_data)
607static int cipher_des_ede3_cbc_init(EVP_CIPHER_CTX *ctx,
608                                    const unsigned char *key,
609                                    const unsigned char *iv, int enc)
610{
611    DES3_CBCInit(data(ctx), (unsigned char *)key, (unsigned char *)iv, enc);
612    return 1;
613}
614
615static int cipher_des_ede3_cbc_code(EVP_CIPHER_CTX *ctx, unsigned char *out,
616                                    const unsigned char *in, unsigned int inl)
617{
618    int ret = DES3_CBCUpdate(data(ctx), out, (unsigned char *)in, inl);
619    switch (ret) {
620    case RE_LEN:
621        RSAREFerr(RSAREF_F_CIPHER_DES_CBC_CODE,
622                  RSAREF_R_LENGTH_NOT_BLOCK_ALIGNED);
623        break;
624    case 0:
625        break;
626    default:
627        RSAREFerr(RSAREF_F_CIPHER_DES_CBC_CODE, RSAREF_R_UNKNOWN_FAULT);
628    }
629    return !ret;
630}
631
632static int cipher_des_ede3_cbc_clean(EVP_CIPHER_CTX *ctx)
633{
634    memset(data(ctx), 0, ctx->cipher->ctx_size);
635    return 1;
636}
637
638#undef data
639#define data(ctx) ((DESX_CBC_CTX *)(ctx)->cipher_data)
640static int cipher_desx_cbc_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
641                                const unsigned char *iv, int enc)
642{
643    DESX_CBCInit(data(ctx), (unsigned char *)key, (unsigned char *)iv, enc);
644    return 1;
645}
646
647static int cipher_desx_cbc_code(EVP_CIPHER_CTX *ctx, unsigned char *out,
648                                const unsigned char *in, unsigned int inl)
649{
650    int ret = DESX_CBCUpdate(data(ctx), out, (unsigned char *)in, inl);
651    switch (ret) {
652    case RE_LEN:
653        RSAREFerr(RSAREF_F_CIPHER_DES_CBC_CODE,
654                  RSAREF_R_LENGTH_NOT_BLOCK_ALIGNED);
655        break;
656    case 0:
657        break;
658    default:
659        RSAREFerr(RSAREF_F_CIPHER_DES_CBC_CODE, RSAREF_R_UNKNOWN_FAULT);
660    }
661    return !ret;
662}
663
664static int cipher_desx_cbc_clean(EVP_CIPHER_CTX *ctx)
665{
666    memset(data(ctx), 0, ctx->cipher->ctx_size);
667    return 1;
668}
669
670/*****************************************************************************
671 * MD functions
672 **/
673#undef data
674#define data(ctx) ((MD2_CTX *)(ctx)->md_data)
675static int digest_md2_init(EVP_MD_CTX *ctx)
676{
677    MD2Init(data(ctx));
678    return 1;
679}
680
681static int digest_md2_update(EVP_MD_CTX *ctx, const void *data,
682                             unsigned long count)
683{
684    MD2Update(data(ctx), (unsigned char *)data, (unsigned int)count);
685    return 1;
686}
687
688static int digest_md2_final(EVP_MD_CTX *ctx, unsigned char *md)
689{
690    MD2Final(md, data(ctx));
691    return 1;
692}
693
694#undef data
695#define data(ctx) ((MD5_CTX *)(ctx)->md_data)
696static int digest_md5_init(EVP_MD_CTX *ctx)
697{
698    MD5Init(data(ctx));
699    return 1;
700}
701
702static int digest_md5_update(EVP_MD_CTX *ctx, const void *data,
703                             unsigned long count)
704{
705    MD5Update(data(ctx), (unsigned char *)data, (unsigned int)count);
706    return 1;
707}
708
709static int digest_md5_final(EVP_MD_CTX *ctx, unsigned char *md)
710{
711    MD5Final(md, data(ctx));
712    return 1;
713}
714