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45 lines
1.0 KiB
C
45 lines
1.0 KiB
C
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/*
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* Top-level vtables to select a SHA-1 implementation.
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*/
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#include <assert.h>
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#include <stdlib.h>
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#include "putty.h"
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#include "ssh.h"
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#include "sha1.h"
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static ssh_hash *sha1_select(const ssh_hashalg *alg)
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{
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static const ssh_hashalg *const real_algs[] = {
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#if HAVE_SHA_NI
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&ssh_sha1_ni,
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#endif
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#if HAVE_NEON_CRYPTO
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&ssh_sha1_neon,
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#endif
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&ssh_sha1_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 ssh_hashalg *alg = real_algs[i];
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const struct sha1_extra *alg_extra =
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(const struct sha1_extra *)alg->extra;
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if (check_availability(alg_extra))
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return ssh_hash_new(alg);
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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 SHA-1, which
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* is always available. */
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unreachable("sha1_select ran off the end of its list");
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}
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const ssh_hashalg ssh_sha1 = {
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.new = sha1_select,
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.hlen = 20,
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.blocklen = 64,
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HASHALG_NAMES_ANNOTATED("SHA-1", "dummy selector vtable"),
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};
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