curve25519: Small libgcrypt bignum fix
* src/curve25519.c (ssh_client_curve25519_init): Make use of the gcrypt-variant of 'bignum_bin2bn'. Signed-off-by: Justus Winter <justus@g10code.com> Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
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@ -71,11 +71,14 @@ int ssh_client_curve25519_init(ssh_session session){
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static int ssh_curve25519_build_k(ssh_session session) {
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ssh_curve25519_pubkey k;
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#ifdef HAVE_LIBCRYPTO
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session->next_crypto->k = bignum_new();
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if (session->next_crypto->k == NULL) {
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return SSH_ERROR;
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}
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#endif
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if (session->server)
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crypto_scalarmult(k, session->next_crypto->curve25519_privkey,
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@ -84,7 +87,11 @@ static int ssh_curve25519_build_k(ssh_session session) {
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crypto_scalarmult(k, session->next_crypto->curve25519_privkey,
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session->next_crypto->curve25519_server_pubkey);
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#ifdef HAVE_LIBGCRYPT
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bignum_bin2bn(k, CURVE25519_PUBKEY_SIZE, &session->next_crypto->k);
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#elif defined HAVE_LIBCRYPTO
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bignum_bin2bn(k, CURVE25519_PUBKEY_SIZE, session->next_crypto->k);
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#endif
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#ifdef DEBUG_CRYPTO
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ssh_print_hexa("Session server cookie",
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