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42 lines
1007 B
42 lines
1007 B
#include <openssl/bn.h> |
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#include <openssl/rand.h> |
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static int Rand(n) |
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{ |
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unsigned char x[2]; |
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RAND_pseudo_bytes(x, 2); |
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return (x[0] + 2 * x[1]); |
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} |
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static void bug(char *m, BIGNUM *a, BIGNUM *b) |
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{ |
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printf("%s!\na=", m); |
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BN_print_fp(stdout, a); |
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printf("\nb="); |
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BN_print_fp(stdout, b); |
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printf("\n"); |
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fflush(stdout); |
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} |
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main() |
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{ |
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BIGNUM *a = BN_new(), *b = BN_new(), *c = BN_new(), *d = BN_new(), |
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*C = BN_new(), *D = BN_new(); |
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BN_RECP_CTX *recp = BN_RECP_CTX_new(); |
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BN_CTX *ctx = BN_CTX_new(); |
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for (;;) { |
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BN_pseudo_rand(a, Rand(), 0, 0); |
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BN_pseudo_rand(b, Rand(), 0, 0); |
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if (BN_is_zero(b)) |
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continue; |
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BN_RECP_CTX_set(recp, b, ctx); |
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if (BN_div(C, D, a, b, ctx) != 1) |
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bug("BN_div failed", a, b); |
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if (BN_div_recp(c, d, a, recp, ctx) != 1) |
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bug("BN_div_recp failed", a, b); |
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else if (BN_cmp(c, C) != 0 || BN_cmp(c, C) != 0) |
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bug("mismatch", a, b); |
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} |
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}
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