acvp: add SHA-512/256 support.

Change-Id: Ib5d69d82c4cfc8cc172bdb5d9a739af53f9d2899
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/44165
Reviewed-by: David Benjamin <davidben@google.com>
Commit-Queue: Adam Langley <agl@google.com>

util/fipstools/acvp/acvptool/subprocess/subprocess.go

@@ -76,6 +76,7 @@ func NewWithIO(cmd *exec.Cmd, in io.WriteCloser, out io.ReadCloser) *Subprocess
 		"SHA2-256":      &hashPrimitive{"SHA2-256", 32},
 		"SHA2-384":      &hashPrimitive{"SHA2-384", 48},
 		"SHA2-512":      &hashPrimitive{"SHA2-512", 64},
+		"SHA2-512/256":  &hashPrimitive{"SHA2-512/256", 32},
 		"ACVP-AES-ECB":  &blockCipher{"AES", 16, 2, true, false, iterateAES},
 		"ACVP-AES-CBC":  &blockCipher{"AES-CBC", 16, 2, true, true, iterateAESCBC},
 		"ACVP-AES-CTR":  &blockCipher{"AES-CTR", 16, 1, false, true, nil},

util/fipstools/acvp/modulewrapper/modulewrapper.cc

@@ -163,6 +163,13 @@ static bool GetConfig(const Span<const uint8_t> args[]) {
           "min": 0, "max": 65528, "increment": 8
         }]
       },
+      {
+        "algorithm": "SHA2-512/256",
+        "revision": "1.0",
+        "messageLength": [{
+          "min": 0, "max": 65528, "increment": 8
+        }]
+      },
       {
         "algorithm": "SHA-1",
         "revision": "1.0",
@@ -1557,6 +1564,7 @@ static constexpr struct {
     {"SHA2-256", 1, Hash<SHA256, SHA256_DIGEST_LENGTH>},
     {"SHA2-384", 1, Hash<SHA384, SHA256_DIGEST_LENGTH>},
     {"SHA2-512", 1, Hash<SHA512, SHA512_DIGEST_LENGTH>},
+    {"SHA2-512/256", 1, Hash<SHA512_256, SHA512_256_DIGEST_LENGTH>},
     {"AES/encrypt", 3, AES<AES_set_encrypt_key, AES_encrypt>},
     {"AES/decrypt", 3, AES<AES_set_decrypt_key, AES_decrypt>},
     {"AES-CBC/encrypt", 4, AES_CBC<AES_set_encrypt_key, AES_ENCRYPT>},