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| 1 /* crypto/asn1/a_int.c */ | 1 /* crypto/asn1/a_int.c */ |
| 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) | 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| 3 * All rights reserved. | 3 * All rights reserved. |
| 4 * | 4 * |
| 5 * This package is an SSL implementation written | 5 * This package is an SSL implementation written |
| 6 * by Eric Young (eay@cryptsoft.com). | 6 * by Eric Young (eay@cryptsoft.com). |
| 7 * The implementation was written so as to conform with Netscapes SSL. | 7 * The implementation was written so as to conform with Netscapes SSL. |
| 8 * | 8 * |
| 9 * This library is free for commercial and non-commercial use as long as | 9 * This library is free for commercial and non-commercial use as long as |
| 10 * the following conditions are aheared to. The following conditions | 10 * the following conditions are aheared to. The following conditions |
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| 54 * derivative of this code cannot be changed. i.e. this code cannot simply be | 54 * derivative of this code cannot be changed. i.e. this code cannot simply be |
| 55 * copied and put under another distribution licence | 55 * copied and put under another distribution licence |
| 56 * [including the GNU Public Licence.] | 56 * [including the GNU Public Licence.] |
| 57 */ | 57 */ |
| 58 | 58 |
| 59 #include <stdio.h> | 59 #include <stdio.h> |
| 60 #include "cryptlib.h" | 60 #include "cryptlib.h" |
| 61 #include <openssl/asn1.h> | 61 #include <openssl/asn1.h> |
| 62 #include <openssl/bn.h> | 62 #include <openssl/bn.h> |
| 63 | 63 |
| 64 ASN1_INTEGER *ASN1_INTEGER_dup(ASN1_INTEGER *x) | 64 ASN1_INTEGER *ASN1_INTEGER_dup(const ASN1_INTEGER *x) |
| 65 { return M_ASN1_INTEGER_dup(x);} | 65 { return M_ASN1_INTEGER_dup(x);} |
| 66 | 66 |
| 67 int ASN1_INTEGER_cmp(ASN1_INTEGER *x, ASN1_INTEGER *y) | 67 int ASN1_INTEGER_cmp(const ASN1_INTEGER *x, const ASN1_INTEGER *y) |
| 68 { | 68 { |
| 69 int neg, ret; | 69 int neg, ret; |
| 70 /* Compare signs */ | 70 /* Compare signs */ |
| 71 neg = x->type & V_ASN1_NEG; | 71 neg = x->type & V_ASN1_NEG; |
| 72 if (neg != (y->type & V_ASN1_NEG)) | 72 if (neg != (y->type & V_ASN1_NEG)) |
| 73 { | 73 { |
| 74 if (neg) | 74 if (neg) |
| 75 return -1; | 75 return -1; |
| 76 else | 76 else |
| 77 return 1; | 77 return 1; |
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| 266 /* This is a version of d2i_ASN1_INTEGER that ignores the sign bit of | 266 /* This is a version of d2i_ASN1_INTEGER that ignores the sign bit of |
| 267 * ASN1 integers: some broken software can encode a positive INTEGER | 267 * ASN1 integers: some broken software can encode a positive INTEGER |
| 268 * with its MSB set as negative (it doesn't add a padding zero). | 268 * with its MSB set as negative (it doesn't add a padding zero). |
| 269 */ | 269 */ |
| 270 | 270 |
| 271 ASN1_INTEGER *d2i_ASN1_UINTEGER(ASN1_INTEGER **a, const unsigned char **pp, | 271 ASN1_INTEGER *d2i_ASN1_UINTEGER(ASN1_INTEGER **a, const unsigned char **pp, |
| 272 long length) | 272 long length) |
| 273 { | 273 { |
| 274 ASN1_INTEGER *ret=NULL; | 274 ASN1_INTEGER *ret=NULL; |
| 275 const unsigned char *p; | 275 const unsigned char *p; |
| 276 » unsigned char *to,*s; | 276 » unsigned char *s; |
| 277 long len; | 277 long len; |
| 278 int inf,tag,xclass; | 278 int inf,tag,xclass; |
| 279 int i; | 279 int i; |
| 280 | 280 |
| 281 if ((a == NULL) || ((*a) == NULL)) | 281 if ((a == NULL) || ((*a) == NULL)) |
| 282 { | 282 { |
| 283 if ((ret=M_ASN1_INTEGER_new()) == NULL) return(NULL); | 283 if ((ret=M_ASN1_INTEGER_new()) == NULL) return(NULL); |
| 284 ret->type=V_ASN1_INTEGER; | 284 ret->type=V_ASN1_INTEGER; |
| 285 } | 285 } |
| 286 else | 286 else |
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| 301 } | 301 } |
| 302 | 302 |
| 303 /* We must OPENSSL_malloc stuff, even for 0 bytes otherwise it | 303 /* We must OPENSSL_malloc stuff, even for 0 bytes otherwise it |
| 304 * signifies a missing NULL parameter. */ | 304 * signifies a missing NULL parameter. */ |
| 305 s=(unsigned char *)OPENSSL_malloc((int)len+1); | 305 s=(unsigned char *)OPENSSL_malloc((int)len+1); |
| 306 if (s == NULL) | 306 if (s == NULL) |
| 307 { | 307 { |
| 308 i=ERR_R_MALLOC_FAILURE; | 308 i=ERR_R_MALLOC_FAILURE; |
| 309 goto err; | 309 goto err; |
| 310 } | 310 } |
| 311 to=s; | |
| 312 ret->type=V_ASN1_INTEGER; | 311 ret->type=V_ASN1_INTEGER; |
| 313 if(len) { | 312 if(len) { |
| 314 if ((*p == 0) && (len != 1)) | 313 if ((*p == 0) && (len != 1)) |
| 315 { | 314 { |
| 316 p++; | 315 p++; |
| 317 len--; | 316 len--; |
| 318 } | 317 } |
| 319 memcpy(s,p,(int)len); | 318 memcpy(s,p,(int)len); |
| 320 p+=len; | 319 p+=len; |
| 321 } | 320 } |
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| 366 buf[i]=(int)d&0xff; | 365 buf[i]=(int)d&0xff; |
| 367 d>>=8; | 366 d>>=8; |
| 368 } | 367 } |
| 369 j=0; | 368 j=0; |
| 370 for (k=i-1; k >=0; k--) | 369 for (k=i-1; k >=0; k--) |
| 371 a->data[j++]=buf[k]; | 370 a->data[j++]=buf[k]; |
| 372 a->length=j; | 371 a->length=j; |
| 373 return(1); | 372 return(1); |
| 374 } | 373 } |
| 375 | 374 |
| 376 long ASN1_INTEGER_get(ASN1_INTEGER *a) | 375 long ASN1_INTEGER_get(const ASN1_INTEGER *a) |
| 377 { | 376 { |
| 378 int neg=0,i; | 377 int neg=0,i; |
| 379 long r=0; | 378 long r=0; |
| 380 | 379 |
| 381 if (a == NULL) return(0L); | 380 if (a == NULL) return(0L); |
| 382 i=a->type; | 381 i=a->type; |
| 383 if (i == V_ASN1_NEG_INTEGER) | 382 if (i == V_ASN1_NEG_INTEGER) |
| 384 neg=1; | 383 neg=1; |
| 385 else if (i != V_ASN1_INTEGER) | 384 else if (i != V_ASN1_INTEGER) |
| 386 return -1; | 385 return -1; |
| 387 | 386 |
| 388 if (a->length > (int)sizeof(long)) | 387 if (a->length > (int)sizeof(long)) |
| 389 { | 388 { |
| 390 /* hmm... a bit ugly */ | 389 /* hmm... a bit ugly */ |
| 391 return(0xffffffffL); | 390 return(0xffffffffL); |
| 392 } | 391 } |
| 393 if (a->data == NULL) | 392 if (a->data == NULL) |
| 394 return 0; | 393 return 0; |
| 395 | 394 |
| 396 for (i=0; i<a->length; i++) | 395 for (i=0; i<a->length; i++) |
| 397 { | 396 { |
| 398 r<<=8; | 397 r<<=8; |
| 399 r|=(unsigned char)a->data[i]; | 398 r|=(unsigned char)a->data[i]; |
| 400 } | 399 } |
| 401 if (neg) r= -r; | 400 if (neg) r= -r; |
| 402 return(r); | 401 return(r); |
| 403 } | 402 } |
| 404 | 403 |
| 405 ASN1_INTEGER *BN_to_ASN1_INTEGER(BIGNUM *bn, ASN1_INTEGER *ai) | 404 ASN1_INTEGER *BN_to_ASN1_INTEGER(const BIGNUM *bn, ASN1_INTEGER *ai) |
| 406 { | 405 { |
| 407 ASN1_INTEGER *ret; | 406 ASN1_INTEGER *ret; |
| 408 int len,j; | 407 int len,j; |
| 409 | 408 |
| 410 if (ai == NULL) | 409 if (ai == NULL) |
| 411 ret=M_ASN1_INTEGER_new(); | 410 ret=M_ASN1_INTEGER_new(); |
| 412 else | 411 else |
| 413 ret=ai; | 412 ret=ai; |
| 414 if (ret == NULL) | 413 if (ret == NULL) |
| 415 { | 414 { |
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| 437 { | 436 { |
| 438 ret->data[0] = 0; | 437 ret->data[0] = 0; |
| 439 ret->length = 1; | 438 ret->length = 1; |
| 440 } | 439 } |
| 441 return(ret); | 440 return(ret); |
| 442 err: | 441 err: |
| 443 if (ret != ai) M_ASN1_INTEGER_free(ret); | 442 if (ret != ai) M_ASN1_INTEGER_free(ret); |
| 444 return(NULL); | 443 return(NULL); |
| 445 } | 444 } |
| 446 | 445 |
| 447 BIGNUM *ASN1_INTEGER_to_BN(ASN1_INTEGER *ai, BIGNUM *bn) | 446 BIGNUM *ASN1_INTEGER_to_BN(const ASN1_INTEGER *ai, BIGNUM *bn) |
| 448 { | 447 { |
| 449 BIGNUM *ret; | 448 BIGNUM *ret; |
| 450 | 449 |
| 451 if ((ret=BN_bin2bn(ai->data,ai->length,bn)) == NULL) | 450 if ((ret=BN_bin2bn(ai->data,ai->length,bn)) == NULL) |
| 452 ASN1err(ASN1_F_ASN1_INTEGER_TO_BN,ASN1_R_BN_LIB); | 451 ASN1err(ASN1_F_ASN1_INTEGER_TO_BN,ASN1_R_BN_LIB); |
| 453 else if(ai->type == V_ASN1_NEG_INTEGER) | 452 else if(ai->type == V_ASN1_NEG_INTEGER) |
| 454 BN_set_negative(ret, 1); | 453 BN_set_negative(ret, 1); |
| 455 return(ret); | 454 return(ret); |
| 456 } | 455 } |
| 457 | 456 |
| 458 IMPLEMENT_STACK_OF(ASN1_INTEGER) | 457 IMPLEMENT_STACK_OF(ASN1_INTEGER) |
| 459 IMPLEMENT_ASN1_SET_OF(ASN1_INTEGER) | 458 IMPLEMENT_ASN1_SET_OF(ASN1_INTEGER) |
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