Fix SHA*_Final documentation.

The minimum buffer size requirements on some were off.

Change-Id: I3eabe3dc352e4333efedb40aa071daa2f2ea0db2
Reviewed-on: https://boringssl-review.googlesource.com/1902
Reviewed-by: Adam Langley <agl@google.com>
diff --git a/include/openssl/sha.h b/include/openssl/sha.h
index 9e71ec4..1f321fc 100644
--- a/include/openssl/sha.h
+++ b/include/openssl/sha.h
@@ -120,11 +120,11 @@
 OPENSSL_EXPORT int SHA224_Update(SHA256_CTX *sha, const void *data, size_t len);
 
 /* SHA224_Final adds the final padding to |sha| and writes the resulting digest
- * to |md|, which must have at least |SHA_DIGEST_LENGTH| bytes of space. */
+ * to |md|, which must have at least |SHA224_DIGEST_LENGTH| bytes of space. */
 OPENSSL_EXPORT int SHA224_Final(uint8_t *md, SHA256_CTX *sha);
 
 /* SHA224 writes the digest of |len| bytes from |data| to |out| and returns
- * |out|. There must be at least |SHA_DIGEST_LENGTH| bytes of space in
+ * |out|. There must be at least |SHA224_DIGEST_LENGTH| bytes of space in
  * |out|. */
 OPENSSL_EXPORT uint8_t *SHA224(const uint8_t *data, size_t len, uint8_t *out);
 
@@ -144,11 +144,11 @@
 OPENSSL_EXPORT int SHA256_Update(SHA256_CTX *sha, const void *data, size_t len);
 
 /* SHA256_Final adds the final padding to |sha| and writes the resulting digest
- * to |md|, which must have at least |SHA_DIGEST_LENGTH| bytes of space. */
+ * to |md|, which must have at least |SHA256_DIGEST_LENGTH| bytes of space. */
 OPENSSL_EXPORT int SHA256_Final(uint8_t *md, SHA256_CTX *sha);
 
 /* SHA256 writes the digest of |len| bytes from |data| to |out| and returns
- * |out|. There must be at least |SHA_DIGEST_LENGTH| bytes of space in
+ * |out|. There must be at least |SHA256_DIGEST_LENGTH| bytes of space in
  * |out|. */
 OPENSSL_EXPORT uint8_t *SHA256(const uint8_t *data, size_t len, uint8_t *out);
 
@@ -179,11 +179,11 @@
 OPENSSL_EXPORT int SHA384_Update(SHA512_CTX *sha, const void *data, size_t len);
 
 /* SHA384_Final adds the final padding to |sha| and writes the resulting digest
- * to |md|, which must have at least |SHA_DIGEST_LENGTH| bytes of space. */
+ * to |md|, which must have at least |SHA384_DIGEST_LENGTH| bytes of space. */
 OPENSSL_EXPORT int SHA384_Final(uint8_t *md, SHA512_CTX *sha);
 
 /* SHA384 writes the digest of |len| bytes from |data| to |out| and returns
- * |out|. There must be at least |SHA_DIGEST_LENGTH| bytes of space in
+ * |out|. There must be at least |SHA384_DIGEST_LENGTH| bytes of space in
  * |out|. */
 OPENSSL_EXPORT uint8_t *SHA384(const uint8_t *data, size_t len, uint8_t *out);
 
@@ -207,11 +207,11 @@
 OPENSSL_EXPORT int SHA512_Update(SHA512_CTX *sha, const void *data, size_t len);
 
 /* SHA512_Final adds the final padding to |sha| and writes the resulting digest
- * to |md|, which must have at least |SHA_DIGEST_LENGTH| bytes of space. */
+ * to |md|, which must have at least |SHA512_DIGEST_LENGTH| bytes of space. */
 OPENSSL_EXPORT int SHA512_Final(uint8_t *md, SHA512_CTX *sha);
 
 /* SHA512 writes the digest of |len| bytes from |data| to |out| and returns
- * |out|. There must be at least |SHA_DIGEST_LENGTH| bytes of space in
+ * |out|. There must be at least |SHA512_DIGEST_LENGTH| bytes of space in
  * |out|. */
 OPENSSL_EXPORT uint8_t *SHA512(const uint8_t *data, size_t len, uint8_t *out);