lib/crypto: sha1: Add at_least decoration to fixed-size array params

Add the at_least (i.e. 'static') decoration to the fixed-size array
parameters of the sha1 library functions. This causes clang to warn
when a too-small array of known size is passed.

Acked-by: Ard Biesheuvel <[e-mail]>
Acked-by: "Jason A. Donenfeld" <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Eric Biggers <[e-mail]>

include/crypto/sha1.h

···
  *
  * Context: Any context.
  */
-void sha1_final(struct sha1_ctx *ctx, u8 out[SHA1_DIGEST_SIZE]);
+void sha1_final(struct sha1_ctx *ctx, u8 out[at_least SHA1_DIGEST_SIZE]);
 
 /**
  * sha1() - Compute SHA-1 message digest in one shot
···
  *
  * Context: Any context.
  */
-void sha1(const u8 *data, size_t len, u8 out[SHA1_DIGEST_SIZE]);
+void sha1(const u8 *data, size_t len, u8 out[at_least SHA1_DIGEST_SIZE]);
 
 /**
  * struct hmac_sha1_key - Prepared key for HMAC-SHA1
···
  *
  * Context: Any context.
  */
-void hmac_sha1_final(struct hmac_sha1_ctx *ctx, u8 out[SHA1_DIGEST_SIZE]);
+void hmac_sha1_final(struct hmac_sha1_ctx *ctx,
+		     u8 out[at_least SHA1_DIGEST_SIZE]);
 
 /**
  * hmac_sha1() - Compute HMAC-SHA1 in one shot, using a prepared key
···
  * Context: Any context.
  */
 void hmac_sha1(const struct hmac_sha1_key *key,
-	       const u8 *data, size_t data_len, u8 out[SHA1_DIGEST_SIZE]);
+	       const u8 *data, size_t data_len,
+	       u8 out[at_least SHA1_DIGEST_SIZE]);
 
 /**
  * hmac_sha1_usingrawkey() - Compute HMAC-SHA1 in one shot, using a raw key
···
  */
 void hmac_sha1_usingrawkey(const u8 *raw_key, size_t raw_key_len,
 			   const u8 *data, size_t data_len,
-			   u8 out[SHA1_DIGEST_SIZE]);
+			   u8 out[at_least SHA1_DIGEST_SIZE]);
 
 #endif /* _CRYPTO_SHA1_H */