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Don't require tag before ciphertext in AESGCM mode

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This commit is contained in:
Dr. Stephen Henson 2012-10-16 22:46:08 +00:00
parent 3bc522a246
commit 964eaad78c
1 changed files with 2 additions and 2 deletions
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4
crypto/evp/e_aes.c
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@ -1343,8 +1343,6 @@ static int aes_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
if (!gctx->iv_set) if (!gctx->iv_set)
return -1; return -1;
if (!ctx->encrypt && gctx->taglen < 0)
return -1;
if (in) if (in)
{ {
if (out == NULL) if (out == NULL)
@ -1386,6 +1384,8 @@ static int aes_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
{ {
if (!ctx->encrypt) if (!ctx->encrypt)
{ {
if (gctx->taglen < 0)
return -1;
if (CRYPTO_gcm128_finish(&gctx->gcm, if (CRYPTO_gcm128_finish(&gctx->gcm,
ctx->buf, gctx->taglen) != 0) ctx->buf, gctx->taglen) != 0)
return -1; return -1;