diff options
| author | Bodo Möller <bodo@openssl.org> | 2001-06-15 18:05:09 +0000 |
|---|---|---|
| committer | Bodo Möller <bodo@openssl.org> | 2001-06-15 18:05:09 +0000 |
| commit | 285b42756ae3023d885461d819fad14fc1e363e3 (patch) | |
| tree | 47e0c5ac6b8f4b9b596e72b28a08a5cc416aadde /ssl/s3_enc.c | |
| parent | 508f15cdabe9c66db694efb24028cc38b9bee261 (diff) | |
pay attention to blocksize before attempting decryption
Diffstat (limited to 'ssl/s3_enc.c')
| -rw-r--r-- | ssl/s3_enc.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/ssl/s3_enc.c b/ssl/s3_enc.c index 8cd36a395c..d1c1946e54 100644 --- a/ssl/s3_enc.c +++ b/ssl/s3_enc.c @@ -373,7 +373,6 @@ int ssl3_enc(SSL *s, int send) /* COMPRESS */ - /* This should be using (bs-1) and bs instead of 7 and 8 */ if ((bs != 1) && send) { i=bs-((int)l%bs); @@ -383,12 +382,24 @@ int ssl3_enc(SSL *s, int send) rec->length+=i; rec->input[l-1]=(i-1); } - + + if (!send) + { + if (l == 0 || l%bs != 0) + { + SSLerr(SSL_F_SSL3_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG); + ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPT_ERROR); + return(0); + } + } + EVP_Cipher(ds,rec->data,rec->input,l); if ((bs != 1) && !send) { i=rec->data[l-1]+1; + /* SSL 3.0 bounds the number of padding bytes by the block size; + * padding bytes (except that last) are arbitrary */ if (i > bs) { SSLerr(SSL_F_SSL3_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG); |