-
-static int print_bin(BIO *fp, const char *str, const unsigned char *num,
- size_t len, int off);
-
-int ECPKParameters_print(BIO *bp, const EC_GROUP *x, int off)
- {
- unsigned char *buffer=NULL;
- size_t buf_len=0, i;
- int ret=0, reason=ERR_R_BIO_LIB;
- BN_CTX *ctx=NULL;
- const EC_POINT *point=NULL;
- BIGNUM *p=NULL, *a=NULL, *b=NULL, *gen=NULL,
- *order=NULL, *cofactor=NULL;
- const unsigned char *seed;
- size_t seed_len=0;
-
- static const char *gen_compressed = "Generator (compressed):";
- static const char *gen_uncompressed = "Generator (uncompressed):";
- static const char *gen_hybrid = "Generator (hybrid):";
-
- if (!x)
- {
- reason = ERR_R_PASSED_NULL_PARAMETER;
- goto err;
- }
-
- ctx = BN_CTX_new();
- if (ctx == NULL)
- {
- reason = ERR_R_MALLOC_FAILURE;
- goto err;
- }
-
- if (EC_GROUP_get_asn1_flag(x))
- {
- /* the curve parameter are given by an asn1 OID */
- int nid;
-
- if (!BIO_indent(bp, off, 128))
- goto err;
-
- nid = EC_GROUP_get_curve_name(x);
- if (nid == 0)
- goto err;
-
- if (BIO_printf(bp, "ASN1 OID: %s", OBJ_nid2sn(nid)) <= 0)
- goto err;
- if (BIO_printf(bp, "\n") <= 0)
- goto err;
- }
- else
- {
- /* explicit parameters */
- int is_char_two = 0;
- point_conversion_form_t form;
- int tmp_nid = EC_METHOD_get_field_type(EC_GROUP_method_of(x));
-
- if (tmp_nid == NID_X9_62_characteristic_two_field)
- is_char_two = 1;
-
- if ((p = BN_new()) == NULL || (a = BN_new()) == NULL ||
- (b = BN_new()) == NULL || (order = BN_new()) == NULL ||
- (cofactor = BN_new()) == NULL)
- {
- reason = ERR_R_MALLOC_FAILURE;
- goto err;
- }
-
- if (is_char_two)
- {
- if (!EC_GROUP_get_curve_GF2m(x, p, a, b, ctx))
- {
- reason = ERR_R_EC_LIB;
- goto err;
- }
- }
- else /* prime field */
- {
- if (!EC_GROUP_get_curve_GFp(x, p, a, b, ctx))
- {
- reason = ERR_R_EC_LIB;
- goto err;
- }
- }
-
- if ((point = EC_GROUP_get0_generator(x)) == NULL)
- {
- reason = ERR_R_EC_LIB;
- goto err;
- }
- if (!EC_GROUP_get_order(x, order, NULL) ||
- !EC_GROUP_get_cofactor(x, cofactor, NULL))
- {
- reason = ERR_R_EC_LIB;
- goto err;
- }
-
- form = EC_GROUP_get_point_conversion_form(x);
-
- if ((gen = EC_POINT_point2bn(x, point,
- form, NULL, ctx)) == NULL)
- {
- reason = ERR_R_EC_LIB;
- goto err;
- }
-
- buf_len = (size_t)BN_num_bytes(p);
- if (buf_len < (i = (size_t)BN_num_bytes(a)))
- buf_len = i;
- if (buf_len < (i = (size_t)BN_num_bytes(b)))
- buf_len = i;
- if (buf_len < (i = (size_t)BN_num_bytes(gen)))
- buf_len = i;
- if (buf_len < (i = (size_t)BN_num_bytes(order)))
- buf_len = i;
- if (buf_len < (i = (size_t)BN_num_bytes(cofactor)))
- buf_len = i;
-
- if ((seed = EC_GROUP_get0_seed(x)) != NULL)
- seed_len = EC_GROUP_get_seed_len(x);
-
- buf_len += 10;
- if ((buffer = OPENSSL_malloc(buf_len)) == NULL)
- {
- reason = ERR_R_MALLOC_FAILURE;
- goto err;
- }
-
- if (!BIO_indent(bp, off, 128))
- goto err;
-
- /* print the 'short name' of the field type */
- if (BIO_printf(bp, "Field Type: %s\n", OBJ_nid2sn(tmp_nid))
- <= 0)
- goto err;
-
- if (is_char_two)
- {
- /* print the 'short name' of the base type OID */
- int basis_type = EC_GROUP_get_basis_type(x);
- if (basis_type == 0)
- goto err;
-
- if (!BIO_indent(bp, off, 128))
- goto err;
-
- if (BIO_printf(bp, "Basis Type: %s\n",
- OBJ_nid2sn(basis_type)) <= 0)
- goto err;
-
- /* print the polynomial */
- if ((p != NULL) && !ASN1_bn_print(bp, "Polynomial:", p, buffer,
- off))
- goto err;
- }
- else
- {
- if ((p != NULL) && !ASN1_bn_print(bp, "Prime:", p, buffer,off))
- goto err;
- }
- if ((a != NULL) && !ASN1_bn_print(bp, "A: ", a, buffer, off))
- goto err;
- if ((b != NULL) && !ASN1_bn_print(bp, "B: ", b, buffer, off))
- goto err;
- if (form == POINT_CONVERSION_COMPRESSED)
- {
- if ((gen != NULL) && !ASN1_bn_print(bp, gen_compressed, gen,
- buffer, off))
- goto err;
- }
- else if (form == POINT_CONVERSION_UNCOMPRESSED)
- {
- if ((gen != NULL) && !ASN1_bn_print(bp, gen_uncompressed, gen,
- buffer, off))
- goto err;
- }
- else /* form == POINT_CONVERSION_HYBRID */
- {
- if ((gen != NULL) && !ASN1_bn_print(bp, gen_hybrid, gen,
- buffer, off))
- goto err;
- }
- if ((order != NULL) && !ASN1_bn_print(bp, "Order: ", order,
- buffer, off)) goto err;
- if ((cofactor != NULL) && !ASN1_bn_print(bp, "Cofactor: ", cofactor,
- buffer, off)) goto err;
- if (seed && !print_bin(bp, "Seed:", seed, seed_len, off))
- goto err;
- }
- ret=1;
-err:
- if (!ret)
- ECerr(EC_F_ECPKPARAMETERS_PRINT, reason);
- if (p)
- BN_free(p);
- if (a)
- BN_free(a);
- if (b)
- BN_free(b);
- if (gen)
- BN_free(gen);
- if (order)
- BN_free(order);
- if (cofactor)
- BN_free(cofactor);
- if (ctx)
- BN_CTX_free(ctx);
- if (buffer != NULL)
- OPENSSL_free(buffer);
- return(ret);
- }
-
-static int print_bin(BIO *fp, const char *name, const unsigned char *buf,
- size_t len, int off)
- {
- size_t i;
- char str[128];
-
- if (buf == NULL)
- return 1;
- if (off)
- {
- if (off > 128)
- off=128;
- memset(str,' ',off);
- if (BIO_write(fp, str, off) <= 0)
- return 0;
- }
-
- if (BIO_printf(fp,"%s", name) <= 0)
- return 0;
-
- for (i=0; i<len; i++)
- {
- if ((i%15) == 0)
- {
- str[0]='\n';
- memset(&(str[1]),' ',off+4);
- if (BIO_write(fp, str, off+1+4) <= 0)
- return 0;
- }
- if (BIO_printf(fp,"%02x%s",buf[i],((i+1) == len)?"":":") <= 0)
- return 0;
- }
- if (BIO_write(fp,"\n",1) <= 0)
- return 0;
-
- return 1;
- }
projects / openssl.git / blobdiff