Seperated different generation methods into modules.

 - Added Koblitz curve generation.

4 files changed, 193 insertions, 0 deletions

diff --git a/src/random/generators.c b/src/random/generators.c
new file mode 100644
index 0000000..9769166
--- /dev/null
+++ b/src/random/generators.c
@@ -0,0 +1,54 @@
+/*
+ * ecgen, tool for generating Elliptic curve domain parameters
+ * Copyright (C) 2017 J08nY
+ */
+#include "generators.h"
+#include "math/curve.h"
+#include "math/equation.h"
+#include "math/field.h"
+#include "random/seed.h"
+
+int gen_skip(curve_t *curve, config_t *config, ...) { return 1; }
+
+void gen_init(gen_t generators[], config_t *config) {
+	if (config->from_seed) {
+		if (config->seed) {
+			generators[OFFSET_SEED] = &seed_argument;
+		} else {
+			if (config->random) {
+				generators[OFFSET_SEED] = &seed_random;
+			} else {
+				generators[OFFSET_SEED] = &seed_input;
+			}
+		}
+		generators[OFFSET_A] = &a_seed;
+		generators[OFFSET_B] = &b_seed;
+		generators[OFFSET_CURVE] = &curve_seed;
+	} else {
+		generators[OFFSET_SEED] = &gen_skip;
+
+		if (config->random) {
+			generators[OFFSET_A] = &a_random;
+			generators[OFFSET_B] = &b_random;
+		} else {
+			generators[OFFSET_A] = &a_input;
+			generators[OFFSET_B] = &b_input;
+		}
+
+		if (config->koblitz) {
+			generators[OFFSET_A] = &a_zero;
+		}
+
+		if (config->prime) {
+			generators[OFFSET_CURVE] = &curve_prime;
+		} else {
+			generators[OFFSET_CURVE] = &curve_nonzero;
+		}
+	}
+
+	if (config->random) {
+		generators[OFFSET_FIELD] = &field_random;
+	} else {
+		generators[OFFSET_FIELD] = &field_input;
+	}
+}
\ No newline at end of file
diff --git a/src/random/generators.h b/src/random/generators.h
new file mode 100644
index 0000000..87e599b
--- /dev/null
+++ b/src/random/generators.h
@@ -0,0 +1,25 @@
+/*
+ * ecgen, tool for generating Elliptic curve domain parameters
+ * Copyright (C) 2017 J08nY
+ */
+#ifndef ECGEN_GENERATORS_H
+#define ECGEN_GENERATORS_H
+
+#include "types.h"
+
+enum gen_offset {
+	OFFSET_SEED,
+	OFFSET_FIELD,
+	OFFSET_A,
+	OFFSET_B,
+	OFFSET_CURVE,
+	OFFSET_POINTS
+};
+
+/**
+ *
+ * @param generators
+ */
+void gen_init(gen_t generators[], config_t *config);
+
+#endif  // ECGEN_GENERATORS_H
diff --git a/src/random/seed.c b/src/random/seed.c
new file mode 100644
index 0000000..a78ff24
--- /dev/null
+++ b/src/random/seed.c
@@ -0,0 +1,70 @@
+/*
+ * ecgen, tool for generating Elliptic curve domain parameters
+ * Copyright (C) 2017 J08nY
+ */
+#include "seed.h"
+#include "io/input.h"
+
+seed_t *seed_new() {
+	seed_t *seed = pari_malloc(sizeof(seed_t));
+	if (!seed) {
+		perror("Couldn't malloc.");
+		exit(1);
+	}
+	memset(seed, 0, sizeof(seed_t));
+	return seed;
+}
+
+void seed_free(seed_t **seed) {
+	if (*seed) {
+		pari_free(*seed);
+		*seed = NULL;
+	}
+}
+
+GEN seed_stoi(const char *cstr) {
+	pari_sp ltop = avma;
+	GEN seed = gen_0;
+
+	size_t len = strlen(cstr);
+	for (size_t i = 0; i < len; ++i) {
+		pari_sp btop = avma;
+		GEN s = stoi(cstr[i]);
+		s = shifti(s, (len - i - 1) * 8);
+		seed = addii(seed, s);
+		if (gc_needed(btop, 1)) gerepileall(btop, 1, seed);
+	}
+
+	return gerepilecopy(ltop, seed);
+}
+
+int seed_random(curve_t *curve, config_t *config, ...) {
+	curve->seed = seed_new();
+	curve->seed->seed = random_int(160);
+	return 1;
+}
+
+int seed_argument(curve_t *curve, config_t *config, ...) {
+	curve->seed = seed_new();
+	curve->seed->seed = seed_stoi(config->seed);
+	return 1;
+}
+
+int seed_input(curve_t *curve, config_t *config, ...) {
+	pari_sp ltop = avma;
+
+	GEN str = fread_string(in, "seed:", '\n');
+	const char *cstr = GSTR(str);
+	if (strlen(cstr) < 20) {
+		fprintf(stderr, "SEED must be at least 160 bits(20 characters).\n");
+		avma = ltop;
+		return 0;
+	}
+
+	GEN seed = seed_stoi(cstr);
+	gerepileall(ltop, 1, &seed);
+
+	curve->seed = seed_new();
+	curve->seed->seed = seed;
+	return 1;
+}
\ No newline at end of file
diff --git a/src/random/seed.h b/src/random/seed.h
new file mode 100644
index 0000000..998bdcd
--- /dev/null
+++ b/src/random/seed.h
@@ -0,0 +1,44 @@
+/*
+ * ecgen, tool for generating Elliptic curve domain parameters
+ * Copyright (C) 2017 J08nY
+ */
+#ifndef ECGEN_SEED_H
+#define ECGEN_SEED_H
+
+#include "io/cli.h"
+#include "types.h"
+
+/**
+ *
+ * @param seed
+ */
+void seed_free(seed_t **seed);
+
+/**
+ *
+ * @param curve
+ * @param config
+ * @param ...
+ * @return
+ */
+int seed_random(curve_t *curve, config_t *config, ...);
+
+/**
+ *
+ * @param curve
+ * @param config
+ * @param ...
+ * @return
+ */
+int seed_argument(curve_t *curve, config_t *config, ...);
+
+/**
+ *
+ * @param curve
+ * @param config
+ * @param ...
+ * @return
+ */
+int seed_input(curve_t *curve, config_t *config, ...);
+
+#endif  // ECGEN_SEED_H