Fix typo's and clarify some language

crypto/fipsmodule/cipher/aead.c

@@ -289,10 +289,6 @@ int EVP_AEAD_CTX_tag_len(const EVP_AEAD_CTX *ctx, size_t *out_tag_len,
   return 1;
 }
 
-// EVP_AEAD_iv_from_ipv4_nanosecs computes a deterministic IV compliant with
-// NIST SP 800-38D, built from an IPv4 address and the number of nanoseconds
-// since boot, writing it to |out_iv|. It returns one on success or zero for
-// error.
 int EVP_AEAD_get_iv_from_ipv4_nanosecs(
     const uint32_t ipv4_address, const uint64_t nanosecs,
     uint8_t out_iv[FIPS_AES_GCM_NONCE_LENGTH]) {

include/openssl/aead.h

@@ -148,7 +148,7 @@ OPENSSL_EXPORT const EVP_AEAD *EVP_aead_aes_256_gcm_siv(void);
 
 // EVP_aead_aes_128_gcm_randnonce is AES-128 in Galois Counter Mode with
 // internal nonce generation. The 12-byte nonce is appended to the tag
-// and is generated internally. The "tag", for the purpurses of the API, is thus
+// and is generated internally. The "tag", for the purposes of the API, is thus
 // 12 bytes larger. The nonce parameter when using this AEAD must be
 // zero-length. Since the nonce is random, a single key should not be used for
 // more than 2^32 seal operations.
@@ -160,7 +160,7 @@ OPENSSL_EXPORT const EVP_AEAD *EVP_aead_aes_128_gcm_randnonce(void);
 
 // EVP_aead_aes_256_gcm_randnonce is AES-256 in Galois Counter Mode with
 // internal nonce generation. The 12-byte nonce is appended to the tag
-// and is generated internally. The "tag", for the purpurses of the API, is thus
+// and is generated internally. The "tag", for the purposes of the API, is thus
 // 12 bytes larger. The nonce parameter when using this AEAD must be
 // zero-length. Since the nonce is random, a single key should not be used for
 // more than 2^32 seal operations.
@@ -171,7 +171,7 @@ OPENSSL_EXPORT const EVP_AEAD *EVP_aead_aes_128_gcm_randnonce(void);
 OPENSSL_EXPORT const EVP_AEAD *EVP_aead_aes_256_gcm_randnonce(void);
 
 // EVP_aead_aes_128_ccm_bluetooth is AES-128-CCM with M=4 and L=2 (4-byte tags
-// and 13-byte nonces), as decribed in the Bluetooth Core Specification v5.0,
+// and 13-byte nonces), as described in the Bluetooth Core Specification v5.0,
 // Volume 6, Part E, Section 1.
 OPENSSL_EXPORT const EVP_AEAD *EVP_aead_aes_128_ccm_bluetooth(void);
 
@@ -196,7 +196,8 @@ OPENSSL_EXPORT int EVP_has_aes_hardware(void);
 OPENSSL_EXPORT size_t EVP_AEAD_key_length(const EVP_AEAD *aead);
 
 // EVP_AEAD_nonce_length returns the length, in bytes, of the per-message nonce
-// for |aead|.
+// for |aead|. Some |aead|s might support a larger set of nonce-lengths (e.g.
+// aes-gcm).
 OPENSSL_EXPORT size_t EVP_AEAD_nonce_length(const EVP_AEAD *aead);
 
 // EVP_AEAD_max_overhead returns the maximum number of additional bytes added