56 lines
971 B
C
56 lines
971 B
C
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#include "codecrypt.h"
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#include "math.h"
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#include "tools.h"
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int ccr_mce_gen (struct ccr_mce_pubkey* Pub, struct ccr_mce_privkey* Priv)
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{
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/* params are taken from privkey matrix */
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int ret;
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int m;
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ccr_mtx h;
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int h_cols, h_rows;
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/* param n must be power of 2 */
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if (ccr_log2 (Priv->n, &m) ) {
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ret = 1;
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goto fail;
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}
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/* check sanity of t param, k<=n-mt */
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if (Priv->n >= m * Priv->t) {
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ret = 2;
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goto fail;
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}
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/* allocate space for goppa polynomial */
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Priv->poly = ccr_malloc (ccr_mtx_alloc_size (t + 1, 1) );
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if (!Priv->poly) {
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ret = 3;
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goto fail;
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}
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/* generate the polynomial */
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if (ccr_gen_irred_poly (Priv->poly, Priv->t) ) {
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ret = 4;
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goto fail_free_poly;
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}
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/* create canonical check matrix */
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if (ccr_goppa_check_mtx (Priv->poly, m, Priv->t, &h, &h_cols, &h_rows) ) {
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ret = 5;
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goto fail_free_poly;
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}
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if(ccr_goppa_systematic_form(h,h_cols,h_rows,
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return 0;
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fail_free_poly:
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ccr_free (Priv->poly);
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fail:
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return ret;
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}
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