-/* $OpenBSD: eck_prn.c,v 1.22 2023/07/01 08:15:31 tb Exp $ */
+/* $OpenBSD: eck_prn.c,v 1.23 2023/07/02 13:48:47 tb Exp $ */
/*
* Written by Nils Larsch for the OpenSSL project.
*/
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)
+static int
+ecpk_print_asn1_parameters(BIO *bp, const EC_GROUP *group, int off)
{
- unsigned char *buffer = NULL;
- size_t buf_len = 0, i;
- int ret = 0, reason = ERR_R_BIO_LIB;
+ const char *nist_name;
int nid;
- 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;
- const char *nname;
-
- if (!x) {
- reason = ERR_R_PASSED_NULL_PARAMETER;
+ int ret = 0;
+
+ if (!BIO_indent(bp, off, 128)) {
+ ECerror(ERR_R_BIO_LIB);
goto err;
}
- ctx = BN_CTX_new();
- if (ctx == NULL) {
- reason = ERR_R_MALLOC_FAILURE;
+
+ if ((nid = EC_GROUP_get_curve_name(group)) == NID_undef) {
+ ECerror(ERR_R_INTERNAL_ERROR);
goto err;
}
- if (EC_GROUP_get_asn1_flag(x)) {
- /* the curve parameter are given by an asn1 OID */
- 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;
+ if (BIO_printf(bp, "ASN1 OID: %s\n", OBJ_nid2sn(nid)) <= 0) {
+ ECerror(ERR_R_BIO_LIB);
+ goto err;
+ }
- nname = EC_curve_nid2nist(nid);
- if (nname) {
- if (!BIO_indent(bp, off, 128))
- goto err;
- if (BIO_printf(bp, "NIST CURVE: %s\n", nname) <= 0)
- goto err;
- }
- } else {
- /* explicit parameters */
- point_conversion_form_t form;
- const char *conversion;
-
- 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;
+ if ((nist_name = EC_curve_nid2nist(nid)) != NULL) {
+ if (!BIO_indent(bp, off, 128)) {
+ ECerror(ERR_R_BIO_LIB);
goto err;
}
- if (!EC_GROUP_get_curve(x, p, a, b, ctx)) {
- reason = ERR_R_EC_LIB;
+ if (BIO_printf(bp, "NIST CURVE: %s\n", nist_name) <= 0) {
+ ECerror(ERR_R_BIO_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);
+ ret = 1;
+ err:
- 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 = malloc(buf_len)) == NULL) {
- reason = ERR_R_MALLOC_FAILURE;
- goto err;
- }
- if (!BIO_indent(bp, off, 128))
- goto err;
+ return ret;
+}
- nid = EC_METHOD_get_field_type(EC_GROUP_method_of(x));
- /* print the 'short name' of the field type */
- if (BIO_printf(bp, "Field Type: %s\n", OBJ_nid2sn(nid)) <= 0)
- goto err;
+static int
+ecpk_print_explicit_parameters(BIO *bp, const EC_GROUP *group, int off)
+{
+ BN_CTX *ctx = NULL;
+ BIGNUM *p, *a, *b, *order, *cofactor;
+ BIGNUM *gen = NULL;
+ const EC_POINT *generator;
+ const unsigned char *conversion, *seed;
+ size_t seed_len;
+ unsigned char *buffer = NULL;
+ size_t buf_len, i;
+ point_conversion_form_t form;
+ int nid;
+ int ret = 0;
- if (!ASN1_bn_print(bp, "Prime:", p, buffer, off))
- goto err;
- if (!ASN1_bn_print(bp, "A: ", a, buffer, off))
- goto err;
- if (!ASN1_bn_print(bp, "B: ", b, buffer, off))
- goto err;
- if (form == POINT_CONVERSION_COMPRESSED)
- conversion = "Generator (compressed):";
- else if (form == POINT_CONVERSION_UNCOMPRESSED)
- conversion = "Generator (uncompressed):";
- else if (form == POINT_CONVERSION_HYBRID)
- conversion = "Generator (hybrid):";
- else
- conversion = "Generator (unknown):";
- if (!ASN1_bn_print(bp, conversion, gen, buffer, off))
- goto err;
- if (!ASN1_bn_print(bp, "Order: ", order, buffer, off))
- goto err;
- if (!ASN1_bn_print(bp, "Cofactor: ", cofactor, buffer, off))
- goto err;
- if (seed && !print_bin(bp, "Seed:", seed, seed_len, off))
+ if ((ctx = BN_CTX_new()) == NULL) {
+ ECerror(ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ BN_CTX_start(ctx);
+
+ if ((p = BN_CTX_get(ctx)) == NULL)
+ goto err;
+ if ((a = BN_CTX_get(ctx)) == NULL)
+ goto err;
+ if ((b = BN_CTX_get(ctx)) == NULL)
+ goto err;
+ if ((order = BN_CTX_get(ctx)) == NULL)
+ goto err;
+ if ((cofactor = BN_CTX_get(ctx)) == NULL)
+ goto err;
+ if ((gen = BN_CTX_get(ctx)) == NULL)
+ goto err;
+
+ if (!EC_GROUP_get_curve(group, p, a, b, ctx)) {
+ ECerror(ERR_R_EC_LIB);
+ goto err;
+ }
+ if (!EC_GROUP_get_order(group, order, NULL)) {
+ ECerror(ERR_R_EC_LIB);
+ goto err;
+ }
+ if (!EC_GROUP_get_cofactor(group, cofactor, NULL)) {
+ ECerror(ERR_R_EC_LIB);
+ goto err;
+ }
+
+ if ((generator = EC_GROUP_get0_generator(group)) == NULL) {
+ ECerror(ERR_R_EC_LIB);
+ goto err;
+ }
+ form = EC_GROUP_get_point_conversion_form(group);
+ if (EC_POINT_point2bn(group, generator, form, gen, ctx) == NULL) {
+ ECerror(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;
+
+ buf_len += 10;
+ if ((buffer = calloc(1, buf_len)) == NULL) {
+ ECerror(ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ if (!BIO_indent(bp, off, 128))
+ goto err;
+
+ nid = EC_METHOD_get_field_type(EC_GROUP_method_of(group));
+ if (BIO_printf(bp, "Field Type: %s\n", OBJ_nid2sn(nid)) <= 0)
+ goto err;
+
+ if (!ASN1_bn_print(bp, "Prime:", p, buffer, off))
+ goto err;
+ if (!ASN1_bn_print(bp, "A: ", a, buffer, off))
+ goto err;
+ if (!ASN1_bn_print(bp, "B: ", b, buffer, off))
+ goto err;
+
+ if (form == POINT_CONVERSION_COMPRESSED)
+ conversion = "Generator (compressed):";
+ else if (form == POINT_CONVERSION_UNCOMPRESSED)
+ conversion = "Generator (uncompressed):";
+ else if (form == POINT_CONVERSION_HYBRID)
+ conversion = "Generator (hybrid):";
+ else
+ conversion = "Generator (unknown):";
+ if (!ASN1_bn_print(bp, conversion, gen, buffer, off))
+ goto err;
+
+ if (!ASN1_bn_print(bp, "Order: ", order, buffer, off))
+ goto err;
+ if (!ASN1_bn_print(bp, "Cofactor: ", cofactor, buffer, off))
+ goto err;
+ if ((seed = EC_GROUP_get0_seed(group)) != NULL) {
+ seed_len = EC_GROUP_get_seed_len(group);
+ if (!print_bin(bp, "Seed:", seed, seed_len, off))
goto err;
}
+
ret = 1;
- err:
- if (!ret)
- ECerror(reason);
- BN_free(p);
- BN_free(a);
- BN_free(b);
- BN_free(gen);
- BN_free(order);
- BN_free(cofactor);
+err:
+ BN_CTX_end(ctx);
BN_CTX_free(ctx);
free(buffer);
- return (ret);
+
+ return ret;
+}
+
+int
+ECPKParameters_print(BIO *bp, const EC_GROUP *group, int off)
+{
+ if (group == NULL) {
+ ECerror(ERR_R_PASSED_NULL_PARAMETER);
+ return 0;
+ }
+
+ if (EC_GROUP_get_asn1_flag(group))
+ return ecpk_print_asn1_parameters(bp, group, off);
+
+ return ecpk_print_explicit_parameters(bp, group, off);
}
static int
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