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39 lines
1.1 KiB
C
39 lines
1.1 KiB
C
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#include "ssh.h"
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#include "aesgcm.h"
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static ssh2_mac *aesgcm_mac_selector_new(const ssh2_macalg *alg,
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ssh_cipher *cipher)
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{
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static const ssh2_macalg *const real_algs[] = {
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#if HAVE_CLMUL
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&ssh2_aesgcm_mac_clmul,
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#endif
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#if HAVE_NEON_PMULL
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&ssh2_aesgcm_mac_neon,
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#endif
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&ssh2_aesgcm_mac_sw,
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NULL,
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};
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for (size_t i = 0; real_algs[i]; i++) {
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const ssh2_macalg *alg = real_algs[i];
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const struct aesgcm_extra *alg_extra =
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(const struct aesgcm_extra *)alg->extra;
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if (check_aesgcm_availability(alg_extra))
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return ssh2_mac_new(alg, cipher);
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}
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/* We should never reach the NULL at the end of the list, because
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* the last non-NULL entry should be software-only GCM, which is
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* always available. */
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unreachable("aesgcm_select ran off the end of its list");
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}
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const ssh2_macalg ssh2_aesgcm_mac = {
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.new = aesgcm_mac_selector_new,
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.name = "",
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.etm_name = "", /* Not selectable independently */
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.len = 16,
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.keylen = 0,
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};
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