Annotation of embedaddon/strongswan/src/libstrongswan/plugins/wolfssl/wolfssl_rsa_private_key.c, revision 1.1
1.1 ! misho 1: /*
! 2: * Copyright (C) 2019 Sean Parkinson, wolfSSL Inc.
! 3: *
! 4: * Permission is hereby granted, free of charge, to any person obtaining a copy
! 5: * of this software and associated documentation files (the "Software"), to deal
! 6: * in the Software without restriction, including without limitation the rights
! 7: * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
! 8: * copies of the Software, and to permit persons to whom the Software is
! 9: * furnished to do so, subject to the following conditions:
! 10: *
! 11: * The above copyright notice and this permission notice shall be included in
! 12: * all copies or substantial portions of the Software.
! 13: *
! 14: * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
! 15: * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
! 16: * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
! 17: * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
! 18: * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
! 19: * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
! 20: * THE SOFTWARE.
! 21: */
! 22:
! 23: #include "wolfssl_common.h"
! 24:
! 25: #ifndef NO_RSA
! 26:
! 27: #include "wolfssl_rsa_private_key.h"
! 28: #include "wolfssl_rsa_public_key.h"
! 29: #include "wolfssl_util.h"
! 30:
! 31: #include <utils/debug.h>
! 32: #include <crypto/hashers/hasher.h>
! 33: #include <credentials/keys/signature_params.h>
! 34:
! 35: #include <wolfssl/wolfcrypt/rsa.h>
! 36: #include <wolfssl/wolfcrypt/asn.h>
! 37:
! 38: typedef struct private_wolfssl_rsa_private_key_t private_wolfssl_rsa_private_key_t;
! 39:
! 40: /**
! 41: * Private data of a wolfssl_rsa_private_key_t object
! 42: */
! 43: struct private_wolfssl_rsa_private_key_t {
! 44:
! 45: /**
! 46: * Public interface
! 47: */
! 48: wolfssl_rsa_private_key_t public;
! 49:
! 50: /**
! 51: * RSA key object from wolfSSL
! 52: */
! 53: RsaKey rsa;
! 54:
! 55: /**
! 56: * Random number generator to use with RSA operations.
! 57: */
! 58: WC_RNG rng;
! 59:
! 60: /**
! 61: * Reference count
! 62: */
! 63: refcount_t ref;
! 64: };
! 65:
! 66: /* implemented in rsa public key */
! 67: bool wolfssl_rsa_encode_public(RsaKey *rsa, chunk_t *encoding);
! 68: bool wolfssl_rsa_fingerprint(RsaKey *rsa, cred_encoding_type_t type, chunk_t *fp);
! 69:
! 70: /**
! 71: * Build RSA signature
! 72: */
! 73: static bool build_signature(private_wolfssl_rsa_private_key_t *this,
! 74: enum wc_HashType hash, chunk_t data, chunk_t *sig)
! 75: {
! 76: int ret = wc_RsaSSL_Sign(data.ptr, data.len, sig->ptr, sig->len, &this->rsa,
! 77: &this->rng);
! 78: if (ret > 0)
! 79: {
! 80: sig->len = ret;
! 81: }
! 82: return ret > 0;
! 83: }
! 84:
! 85: /**
! 86: * Build an EMSA PKCS1 signature described in PKCS#1
! 87: */
! 88: static bool build_emsa_pkcs1_signature(private_wolfssl_rsa_private_key_t *this,
! 89: enum wc_HashType hash, chunk_t data,
! 90: chunk_t *sig)
! 91: {
! 92: bool success = FALSE;
! 93: chunk_t dgst, digestInfo;
! 94: int len;
! 95:
! 96: *sig = chunk_alloc(wc_RsaEncryptSize(&this->rsa));
! 97:
! 98: if (hash == WC_HASH_TYPE_NONE)
! 99: {
! 100: success = build_signature(this, hash, data, sig);
! 101: }
! 102: else if (wolfssl_hash_chunk(hash, data, &dgst))
! 103: {
! 104: digestInfo = chunk_alloc(MAX_DER_DIGEST_SZ);
! 105: len = wc_EncodeSignature(digestInfo.ptr, dgst.ptr, dgst.len,
! 106: wc_HashGetOID(hash));
! 107: if (len > 0)
! 108: {
! 109: digestInfo.len = len;
! 110: success = build_signature(this, hash, digestInfo, sig);
! 111: }
! 112: chunk_free(&digestInfo);
! 113: chunk_free(&dgst);
! 114: }
! 115:
! 116: if (!success)
! 117: {
! 118: chunk_free(sig);
! 119: }
! 120: return success;
! 121: }
! 122:
! 123: #ifdef WC_RSA_PSS
! 124: /**
! 125: * Build an EMSA PSS signature described in PKCS#1
! 126: */
! 127: static bool build_emsa_pss_signature(private_wolfssl_rsa_private_key_t *this,
! 128: rsa_pss_params_t *params, chunk_t data,
! 129: chunk_t *sig)
! 130: {
! 131: bool success = FALSE;
! 132: chunk_t dgst = chunk_empty;
! 133: enum wc_HashType hash;
! 134: int mgf, ret;
! 135:
! 136: if (!wolfssl_hash2type(params->hash, &hash))
! 137: {
! 138: return FALSE;
! 139: }
! 140: if (!wolfssl_hash2mgf1(params->mgf1_hash, &mgf))
! 141: {
! 142: return FALSE;
! 143: }
! 144:
! 145: *sig = chunk_alloc(wc_RsaEncryptSize(&this->rsa));
! 146:
! 147: if (wolfssl_hash_chunk(hash, data, &dgst))
! 148: {
! 149: ret = wc_RsaPSS_Sign_ex(dgst.ptr, dgst.len, sig->ptr, sig->len, hash,
! 150: mgf, params->salt_len, &this->rsa, &this->rng);
! 151: if (ret > 0)
! 152: {
! 153: sig->len = ret;
! 154: success = TRUE;
! 155: }
! 156: }
! 157:
! 158: chunk_free(&dgst);
! 159: if (!success)
! 160: {
! 161: chunk_free(sig);
! 162: }
! 163: return success;
! 164: }
! 165: #endif
! 166:
! 167:
! 168: METHOD(private_key_t, get_type, key_type_t,
! 169: private_wolfssl_rsa_private_key_t *this)
! 170: {
! 171: return KEY_RSA;
! 172: }
! 173:
! 174: METHOD(private_key_t, sign, bool,
! 175: private_wolfssl_rsa_private_key_t *this, signature_scheme_t scheme,
! 176: void *params, chunk_t data, chunk_t *signature)
! 177: {
! 178: switch (scheme)
! 179: {
! 180: case SIGN_RSA_EMSA_PKCS1_NULL:
! 181: return build_emsa_pkcs1_signature(this, WC_HASH_TYPE_NONE, data,
! 182: signature);
! 183: #ifdef WOLFSSL_SHA224
! 184: case SIGN_RSA_EMSA_PKCS1_SHA2_224:
! 185: return build_emsa_pkcs1_signature(this, WC_HASH_TYPE_SHA224, data,
! 186: signature);
! 187: #endif
! 188: #ifndef NO_SHA256
! 189: case SIGN_RSA_EMSA_PKCS1_SHA2_256:
! 190: return build_emsa_pkcs1_signature(this, WC_HASH_TYPE_SHA256, data,
! 191: signature);
! 192: #endif
! 193: #ifdef WOLFSSL_SHA384
! 194: case SIGN_RSA_EMSA_PKCS1_SHA2_384:
! 195: return build_emsa_pkcs1_signature(this, WC_HASH_TYPE_SHA384, data,
! 196: signature);
! 197: #endif
! 198: #ifdef WOLFSSL_SHA512
! 199: case SIGN_RSA_EMSA_PKCS1_SHA2_512:
! 200: return build_emsa_pkcs1_signature(this, WC_HASH_TYPE_SHA512, data,
! 201: signature);
! 202: #endif
! 203: #ifndef NO_SHA
! 204: case SIGN_RSA_EMSA_PKCS1_SHA1:
! 205: return build_emsa_pkcs1_signature(this, WC_HASH_TYPE_SHA, data,
! 206: signature);
! 207: #endif
! 208: #ifndef NO_MD5
! 209: case SIGN_RSA_EMSA_PKCS1_MD5:
! 210: return build_emsa_pkcs1_signature(this, WC_HASH_TYPE_MD5, data,
! 211: signature);
! 212: #endif
! 213: #ifdef WC_RSA_PSS
! 214: case SIGN_RSA_EMSA_PSS:
! 215: return build_emsa_pss_signature(this, params, data, signature);
! 216: #endif
! 217: default:
! 218: DBG1(DBG_LIB, "signature scheme %N not supported via wolfssl",
! 219: signature_scheme_names, scheme);
! 220: return FALSE;
! 221: }
! 222: }
! 223:
! 224: METHOD(private_key_t, decrypt, bool,
! 225: private_wolfssl_rsa_private_key_t *this, encryption_scheme_t scheme,
! 226: chunk_t crypto, chunk_t *plain)
! 227: {
! 228: int padding, mgf, len;
! 229: enum wc_HashType hash;
! 230:
! 231: switch (scheme)
! 232: {
! 233: case ENCRYPT_RSA_PKCS1:
! 234: hash = WC_HASH_TYPE_NONE;
! 235: padding = WC_RSA_PKCSV15_PAD;
! 236: mgf = WC_MGF1NONE;
! 237: break;
! 238: #ifndef WC_NO_RSA_OAEP
! 239: #ifndef NO_SHA
! 240: case ENCRYPT_RSA_OAEP_SHA1:
! 241: hash = WC_HASH_TYPE_SHA;
! 242: padding = WC_RSA_OAEP_PAD;
! 243: mgf = WC_MGF1SHA1;
! 244: break;
! 245: #endif
! 246: #ifdef WOLFSSL_SHA224
! 247: case ENCRYPT_RSA_OAEP_SHA224:
! 248: hash = WC_HASH_TYPE_SHA224;
! 249: padding = WC_RSA_OAEP_PAD;
! 250: mgf = WC_MGF1SHA224;
! 251: break;
! 252: #endif
! 253: #ifndef NO_SHA256
! 254: case ENCRYPT_RSA_OAEP_SHA256:
! 255: hash = WC_HASH_TYPE_SHA256;
! 256: padding = WC_RSA_OAEP_PAD;
! 257: mgf = WC_MGF1SHA256;
! 258: break;
! 259: #endif
! 260: #ifdef WOLFSSL_SHA384
! 261: case ENCRYPT_RSA_OAEP_SHA384:
! 262: hash = WC_HASH_TYPE_SHA384;
! 263: padding = WC_RSA_OAEP_PAD;
! 264: mgf = WC_MGF1SHA384;
! 265: break;
! 266: #endif
! 267: #ifdef WOLFSSL_SHA512
! 268: case ENCRYPT_RSA_OAEP_SHA512:
! 269: hash = WC_HASH_TYPE_SHA512;
! 270: padding = WC_RSA_OAEP_PAD;
! 271: mgf = WC_MGF1SHA512;
! 272: break;
! 273: #endif
! 274: #endif
! 275: default:
! 276: DBG1(DBG_LIB, "encryption scheme %N not supported via wolfssl",
! 277: encryption_scheme_names, scheme);
! 278: return FALSE;
! 279: }
! 280: len = wc_RsaEncryptSize(&this->rsa);
! 281: *plain = chunk_alloc(len);
! 282: len = wc_RsaPrivateDecrypt_ex(crypto.ptr, crypto.len, plain->ptr, len,
! 283: &this->rsa, padding, hash, mgf, NULL, 0);
! 284: if (len < 0)
! 285: {
! 286: DBG1(DBG_LIB, "RSA decryption failed");
! 287: chunk_free(plain);
! 288: return FALSE;
! 289: }
! 290: plain->len = len;
! 291: return TRUE;
! 292: }
! 293:
! 294: METHOD(private_key_t, get_keysize, int,
! 295: private_wolfssl_rsa_private_key_t *this)
! 296: {
! 297: return wc_RsaEncryptSize(&this->rsa) * 8;
! 298: }
! 299:
! 300: METHOD(private_key_t, get_public_key, public_key_t*,
! 301: private_wolfssl_rsa_private_key_t *this)
! 302: {
! 303: public_key_t *key;
! 304: chunk_t enc;
! 305:
! 306: if (!wolfssl_rsa_encode_public(&this->rsa, &enc))
! 307: {
! 308: return NULL;
! 309: }
! 310: key = lib->creds->create(lib->creds, CRED_PUBLIC_KEY, KEY_RSA,
! 311: BUILD_BLOB_ASN1_DER, enc, BUILD_END);
! 312: chunk_free(&enc);
! 313: return key;
! 314: }
! 315:
! 316: METHOD(private_key_t, get_fingerprint, bool,
! 317: private_wolfssl_rsa_private_key_t *this, cred_encoding_type_t type,
! 318: chunk_t *fingerprint)
! 319: {
! 320: return wolfssl_rsa_fingerprint(&this->rsa, type, fingerprint);
! 321: }
! 322:
! 323: METHOD(private_key_t, get_encoding, bool,
! 324: private_wolfssl_rsa_private_key_t *this, cred_encoding_type_t type,
! 325: chunk_t *encoding)
! 326: {
! 327: switch (type)
! 328: {
! 329: case PRIVKEY_ASN1_DER:
! 330: case PRIVKEY_PEM:
! 331: {
! 332: bool success = TRUE;
! 333: int len;
! 334:
! 335: /* n and d are of keysize length, p and q plus the three CRT
! 336: * params roughly half that, the version and e are small */
! 337: len = wc_RsaEncryptSize(&this->rsa) * 5 + MAX_SEQ_SZ;
! 338: *encoding = chunk_alloc(len);
! 339: len = wc_RsaKeyToDer(&this->rsa, encoding->ptr, len);
! 340: if (len < 0)
! 341: {
! 342: chunk_free(encoding);
! 343: return FALSE;
! 344: }
! 345: encoding->len = len;
! 346:
! 347: if (type == PRIVKEY_PEM)
! 348: {
! 349: chunk_t asn1_encoding = *encoding;
! 350:
! 351: success = lib->encoding->encode(lib->encoding, PRIVKEY_PEM,
! 352: NULL, encoding, CRED_PART_RSA_PRIV_ASN1_DER,
! 353: asn1_encoding, CRED_PART_END);
! 354: chunk_clear(&asn1_encoding);
! 355: }
! 356: return success;
! 357: }
! 358: default:
! 359: return FALSE;
! 360: }
! 361: }
! 362:
! 363: METHOD(private_key_t, get_ref, private_key_t*,
! 364: private_wolfssl_rsa_private_key_t *this)
! 365: {
! 366: ref_get(&this->ref);
! 367: return &this->public.key;
! 368: }
! 369:
! 370: METHOD(private_key_t, destroy, void,
! 371: private_wolfssl_rsa_private_key_t *this)
! 372: {
! 373: if (ref_put(&this->ref))
! 374: {
! 375: lib->encoding->clear_cache(lib->encoding, &this->rsa);
! 376: wc_FreeRsaKey(&this->rsa);
! 377: wc_FreeRng(&this->rng);
! 378: free(this);
! 379: }
! 380: }
! 381:
! 382: /**
! 383: * Internal generic constructor
! 384: */
! 385: static private_wolfssl_rsa_private_key_t *create_empty()
! 386: {
! 387: private_wolfssl_rsa_private_key_t *this;
! 388:
! 389: INIT(this,
! 390: .public = {
! 391: .key = {
! 392: .get_type = _get_type,
! 393: .sign = _sign,
! 394: .decrypt = _decrypt,
! 395: .get_keysize = _get_keysize,
! 396: .get_public_key = _get_public_key,
! 397: .equals = private_key_equals,
! 398: .belongs_to = private_key_belongs_to,
! 399: .get_fingerprint = _get_fingerprint,
! 400: .has_fingerprint = private_key_has_fingerprint,
! 401: .get_encoding = _get_encoding,
! 402: .get_ref = _get_ref,
! 403: .destroy = _destroy,
! 404: },
! 405: },
! 406: .ref = 1,
! 407: );
! 408:
! 409: if (wc_InitRng(&this->rng) != 0)
! 410: {
! 411: DBG1(DBG_LIB, "init RNG failed, rsa private key create failed");
! 412: free(this);
! 413: return NULL;
! 414: }
! 415: if (wc_InitRsaKey(&this->rsa, NULL) != 0)
! 416: {
! 417: DBG1(DBG_LIB, "init RSA failed, rsa private key create failed");
! 418: wc_FreeRng(&this->rng);
! 419: free(this);
! 420: return NULL;
! 421: }
! 422: #ifdef WC_RSA_BLINDING
! 423: this->rsa.rng = &this->rng;
! 424: #endif
! 425:
! 426: return this;
! 427: }
! 428:
! 429: /*
! 430: * Described in header
! 431: */
! 432: wolfssl_rsa_private_key_t *wolfssl_rsa_private_key_gen(key_type_t type,
! 433: va_list args)
! 434: {
! 435: private_wolfssl_rsa_private_key_t *this;
! 436: u_int key_size = 0;
! 437:
! 438: while (TRUE)
! 439: {
! 440: switch (va_arg(args, builder_part_t))
! 441: {
! 442: case BUILD_KEY_SIZE:
! 443: key_size = va_arg(args, u_int);
! 444: continue;
! 445: case BUILD_END:
! 446: break;
! 447: default:
! 448: return NULL;
! 449: }
! 450: break;
! 451: }
! 452: if (!key_size)
! 453: {
! 454: return NULL;
! 455: }
! 456:
! 457: this = create_empty();
! 458: if (!this)
! 459: {
! 460: return NULL;
! 461: }
! 462:
! 463: if (wc_MakeRsaKey(&this->rsa, key_size, WC_RSA_EXPONENT, &this->rng) < 0)
! 464: {
! 465: destroy(this);
! 466: return NULL;
! 467: }
! 468: return &this->public;
! 469: }
! 470:
! 471: /**
! 472: * Allocate a random number in the range [0, n-1]
! 473: */
! 474: static bool wolfssl_mp_rand(mp_int *n, WC_RNG *rng, mp_int *r)
! 475: {
! 476: int len, ret;
! 477:
! 478: /* ensure the number has enough memory. */
! 479: ret = mp_set_bit(r, mp_count_bits(n));
! 480: if (ret == 0)
! 481: {
! 482: len = sizeof(*r->dp) * n->used;
! 483: ret = wc_RNG_GenerateBlock(rng, (byte *)r->dp, len);
! 484: }
! 485: if (ret == 0)
! 486: {
! 487: ret = mp_mod(r, n, r);
! 488: }
! 489: return ret == 0;
! 490: }
! 491:
! 492: /**
! 493: * Recover the primes from n, e and d using the algorithm described in
! 494: * Appendix C of NIST SP 800-56B.
! 495: */
! 496: static bool calculate_pq(mp_int *n, mp_int *e, mp_int *d, mp_int *p, mp_int *q,
! 497: mp_int *t1, mp_int *t2, WC_RNG* rng)
! 498: {
! 499: int i, t, j;
! 500: bool success = FALSE;
! 501: mp_int *k = p;
! 502: mp_int *r = p;
! 503: mp_int *n1 = q;
! 504: mp_int *g = t2;
! 505: mp_int *y = t2;
! 506: mp_int *x = t1;
! 507:
! 508: /* k = (d * e) - 1 */
! 509: if (mp_mul(d, e, k) != 0)
! 510: {
! 511: goto error;
! 512: }
! 513: if (mp_sub_d(k, 1, k) != 0)
! 514: {
! 515: goto error;
! 516: }
! 517: /* k must be even */
! 518: if (mp_isodd(k))
! 519: {
! 520: goto error;
! 521: }
! 522: /* k = 2^t * r, where r is the largest odd integer dividing k, and t >= 1 */
! 523: if (mp_copy(k, r) != 0)
! 524: {
! 525: goto error;
! 526: }
! 527: for (t = 0; !mp_isodd(r); t++)
! 528: { /* r = r/2 */
! 529: if (mp_div_2(r, r) != 0)
! 530: goto error;
! 531: }
! 532: /* we need n-1 below */
! 533: if (mp_sub_d(n, 1, n1) != 0)
! 534: {
! 535: goto error;
! 536: }
! 537: for (i = 0; i < 100; i++)
! 538: { /* generate random integer g in [0, n-1] */
! 539: if (!wolfssl_mp_rand(n, rng, g))
! 540: {
! 541: goto error;
! 542: }
! 543: /* y = g^r mod n */
! 544: if (mp_exptmod(g, r, n, y) != 0)
! 545: {
! 546: goto error;
! 547: }
! 548: /* try again if y == 1 or y == n-1 */
! 549: if (mp_isone(y) || mp_cmp(y, n1) == MP_EQ)
! 550: {
! 551: continue;
! 552: }
! 553: for (j = 0; j < t; j++)
! 554: { /* x = y^2 mod n */
! 555: if (mp_sqrmod(y, n, x) != 0)
! 556: {
! 557: goto error;
! 558: }
! 559: /* stop if x == 1 */
! 560: if (mp_isone(x))
! 561: {
! 562: goto done;
! 563: }
! 564: /* retry with new g if x = n-1 */
! 565: if (mp_cmp(x, n1) == MP_EQ)
! 566: {
! 567: break;
! 568: }
! 569: /* y = x */
! 570: if (mp_copy(x, y) != 0)
! 571: {
! 572: goto error;
! 573: }
! 574: }
! 575: }
! 576: goto error;
! 577:
! 578: done:
! 579: /* p = gcd(y-1, n) */
! 580: if (mp_sub_d(y, 1, y) != 0)
! 581: {
! 582: goto error;
! 583: }
! 584: if (mp_gcd(y, n, p) != 0)
! 585: {
! 586: goto error;
! 587: }
! 588: /* q = n/p */
! 589: if (mp_div(n, p, q, NULL) != 0)
! 590: {
! 591: goto error;
! 592: }
! 593:
! 594: success = TRUE;
! 595:
! 596: error:
! 597: return success;
! 598: }
! 599:
! 600: /**
! 601: * Calculates dp = d (mod p-1) or dq = d (mod q-1) for the Chinese remainder
! 602: * algorithm.
! 603: */
! 604: static bool dmodpq1(mp_int *d, mp_int *pq, mp_int *res)
! 605: {
! 606: /* p|q - 1
! 607: * d (mod p|q -1) */
! 608: return mp_sub_d(pq, 1, res) == 0 &&
! 609: mp_mod(d, res, res) == 0;
! 610: }
! 611:
! 612: /**
! 613: * Calculates qinv = q^-1 (mod p) for the Chinese remainder algorithm.
! 614: */
! 615: static int qinv(mp_int *q, mp_int *p, mp_int *res)
! 616: {
! 617: /* q^-1 (mod p) */
! 618: return mp_invmod(q, p, res) == 0;
! 619: }
! 620:
! 621: /*
! 622: * Described in header
! 623: */
! 624: wolfssl_rsa_private_key_t *wolfssl_rsa_private_key_load(key_type_t type,
! 625: va_list args)
! 626: {
! 627: private_wolfssl_rsa_private_key_t *this;
! 628: chunk_t blob, n, e, d, p, q, exp1, exp2, coeff;
! 629: word32 idx;
! 630: int ret;
! 631:
! 632: blob = n = e = d = p = q = exp1 = exp2 = coeff = chunk_empty;
! 633: while (TRUE)
! 634: {
! 635: switch (va_arg(args, builder_part_t))
! 636: {
! 637: case BUILD_BLOB_ASN1_DER:
! 638: blob = va_arg(args, chunk_t);
! 639: continue;
! 640: case BUILD_RSA_MODULUS:
! 641: n = va_arg(args, chunk_t);
! 642: continue;
! 643: case BUILD_RSA_PUB_EXP:
! 644: e = va_arg(args, chunk_t);
! 645: continue;
! 646: case BUILD_RSA_PRIV_EXP:
! 647: d = va_arg(args, chunk_t);
! 648: continue;
! 649: case BUILD_RSA_PRIME1:
! 650: p = va_arg(args, chunk_t);
! 651: continue;
! 652: case BUILD_RSA_PRIME2:
! 653: q = va_arg(args, chunk_t);
! 654: continue;
! 655: case BUILD_RSA_EXP1:
! 656: exp1 = va_arg(args, chunk_t);
! 657: continue;
! 658: case BUILD_RSA_EXP2:
! 659: exp2 = va_arg(args, chunk_t);
! 660: continue;
! 661: case BUILD_RSA_COEFF:
! 662: coeff = va_arg(args, chunk_t);
! 663: continue;
! 664: case BUILD_END:
! 665: break;
! 666: default:
! 667: return NULL;
! 668: }
! 669: break;
! 670: }
! 671:
! 672: this = create_empty();
! 673: if (!this)
! 674: {
! 675: return NULL;
! 676: }
! 677:
! 678: if (blob.ptr)
! 679: {
! 680: idx = 0;
! 681: ret = wc_RsaPrivateKeyDecode(blob.ptr, &idx, &this->rsa, blob.len);
! 682: if (ret == 0)
! 683: {
! 684: return &this->public;
! 685: }
! 686: }
! 687: else if (n.ptr && e.ptr && d.ptr)
! 688: {
! 689: if (mp_read_unsigned_bin(&this->rsa.n, n.ptr, n.len) != 0)
! 690: {
! 691: goto error;
! 692: }
! 693: if (mp_read_unsigned_bin(&this->rsa.e, e.ptr, e.len) != 0)
! 694: {
! 695: goto error;
! 696: }
! 697: if (mp_read_unsigned_bin(&this->rsa.d, d.ptr, d.len) != 0)
! 698: {
! 699: goto error;
! 700: }
! 701: if (p.ptr && q.ptr)
! 702: {
! 703: if (mp_read_unsigned_bin(&this->rsa.p, p.ptr, p.len) != 0)
! 704: {
! 705: goto error;
! 706: }
! 707: if (mp_read_unsigned_bin(&this->rsa.q, q.ptr, q.len) != 0)
! 708: {
! 709: goto error;
! 710: }
! 711: }
! 712: else if (!calculate_pq(&this->rsa.n, &this->rsa.e, &this->rsa.d,
! 713: &this->rsa.p, &this->rsa.q, &this->rsa.dP,
! 714: &this->rsa.dQ, &this->rng))
! 715: {
! 716: goto error;
! 717: }
! 718: if (exp1.ptr)
! 719: {
! 720: if (mp_read_unsigned_bin(&this->rsa.dP, exp1.ptr, exp1.len) != 0)
! 721: {
! 722: goto error;
! 723: }
! 724: }
! 725: else if (!dmodpq1(&this->rsa.d, &this->rsa.p, &this->rsa.dP))
! 726: {
! 727: goto error;
! 728: }
! 729: if (exp2.ptr)
! 730: {
! 731: if (mp_read_unsigned_bin(&this->rsa.dQ, exp2.ptr, exp2.len) != 0)
! 732: {
! 733: goto error;
! 734: }
! 735: }
! 736: else if (!dmodpq1(&this->rsa.d, &this->rsa.q, &this->rsa.dQ))
! 737: {
! 738: goto error;
! 739: }
! 740: if (coeff.ptr)
! 741: {
! 742: if (mp_read_unsigned_bin(&this->rsa.u, coeff.ptr, coeff.len) != 0)
! 743: {
! 744: goto error;
! 745: }
! 746: }
! 747: else if (!qinv(&this->rsa.q, &this->rsa.p, &this->rsa.u))
! 748: {
! 749: goto error;
! 750: }
! 751:
! 752: return &this->public;
! 753: }
! 754: error:
! 755: destroy(this);
! 756: return NULL;
! 757: }
! 758:
! 759: #endif /* NO_RSA */
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