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Diffstat (limited to 'src/lib/libcrypto/cmac/cmac.c')
-rw-r--r--src/lib/libcrypto/cmac/cmac.c17
1 files changed, 1 insertions, 16 deletions
diff --git a/src/lib/libcrypto/cmac/cmac.c b/src/lib/libcrypto/cmac/cmac.c
index 81d6ffc9b5..7ad3434836 100644
--- a/src/lib/libcrypto/cmac/cmac.c
+++ b/src/lib/libcrypto/cmac/cmac.c
@@ -1,4 +1,4 @@
1/* $OpenBSD: cmac.c,v 1.22 2024/01/30 17:43:39 tb Exp $ */ 1/* $OpenBSD: cmac.c,v 1.23 2024/03/02 09:30:21 tb Exp $ */
2/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL 2/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3 * project. 3 * project.
4 */ 4 */
@@ -323,18 +323,3 @@ CMAC_Final(CMAC_CTX *ctx, unsigned char *out, size_t *poutlen)
323 return 1; 323 return 1;
324} 324}
325LCRYPTO_ALIAS(CMAC_Final); 325LCRYPTO_ALIAS(CMAC_Final);
326
327int
328CMAC_resume(CMAC_CTX *ctx)
329{
330 if (ctx->nlast_block == -1)
331 return 0;
332 /* The buffer "tbl" containes the last fully encrypted block
333 * which is the last IV (or all zeroes if no last encrypted block).
334 * The last block has not been modified since CMAC_final().
335 * So reinitialising using the last decrypted block will allow
336 * CMAC to continue after calling CMAC_Final().
337 */
338 return EVP_EncryptInit_ex(ctx->cipher_ctx, NULL, NULL, NULL, ctx->tbl);
339}
340LCRYPTO_ALIAS(CMAC_resume);