From 33ad6eca7adb122cefaab95a3385f279e75f13d4 Mon Sep 17 00:00:00 2001 From: "Dr. Stephen Henson" Date: Thu, 19 Feb 2004 18:17:35 +0000 Subject: [PATCH] Use an OCTET STRING for the encoding of an OCSP nonce value. The old raw format can't be handled by some implementations and updates to RFC2560 will make the OCTET STRING mandatory. --- CHANGES | 7 +++++++ crypto/ocsp/ocsp_ext.c | 24 +++++++++++++++++------- 2 files changed, 24 insertions(+), 7 deletions(-) diff --git a/CHANGES b/CHANGES index 2444eb7c51..27bf3e9bb7 100644 --- a/CHANGES +++ b/CHANGES @@ -4,6 +4,13 @@ Changes between 0.9.7c and 0.9.7d [xx XXX XXXX] + *) When creating an OCSP nonce use an OCTET STRING inside the extnValue. + A clarification of RFC2560 will require the use of OCTET STRINGs and + some implementations cannot handle the current raw format. Since OpenSSL + copies and compares OCSP nonces as opaque blobs without any attempt at + parsing them this should not create any compatibility issues. + [Steve Henson] + *) New md flag EVP_MD_CTX_FLAG_REUSE this allows md_data to be reused when calling EVP_MD_CTX_copy_ex() to avoid calling OPENSSL_malloc(). Without this HMAC (and other) operations are several times slower than OpenSSL diff --git a/crypto/ocsp/ocsp_ext.c b/crypto/ocsp/ocsp_ext.c index d6c8899f58..57399433fc 100644 --- a/crypto/ocsp/ocsp_ext.c +++ b/crypto/ocsp/ocsp_ext.c @@ -305,6 +305,8 @@ err: /* Add a nonce to an extension stack. A nonce can be specificed or if NULL * a random nonce will be generated. + * Note: OpenSSL 0.9.7d and later create an OCTET STRING containing the + * nonce, previous versions used the raw nonce. */ static int ocsp_add1_nonce(STACK_OF(X509_EXTENSION) **exts, unsigned char *val, int len) @@ -313,20 +315,28 @@ static int ocsp_add1_nonce(STACK_OF(X509_EXTENSION) **exts, unsigned char *val, ASN1_OCTET_STRING os; int ret = 0; if (len <= 0) len = OCSP_DEFAULT_NONCE_LENGTH; - if (val) tmpval = val; + /* Create the OCTET STRING manually by writing out the header and + * appending the content octets. This avoids an extra memory allocation + * operation in some cases. Applications should *NOT* do this because + * it relies on library internals. + */ + os.length = ASN1_object_size(0, len, V_ASN1_OCTET_STRING); + os.data = OPENSSL_malloc(os.length); + if (os.data == NULL) + goto err; + tmpval = os.data; + ASN1_put_object(&tmpval, 0, len, V_ASN1_OCTET_STRING, V_ASN1_UNIVERSAL); + if (val) + memcpy(tmpval, val, len); else - { - if (!(tmpval = OPENSSL_malloc(len))) goto err; RAND_pseudo_bytes(tmpval, len); - } - os.data = tmpval; - os.length = len; if(!X509V3_add1_i2d(exts, NID_id_pkix_OCSP_Nonce, &os, 0, X509V3_ADD_REPLACE)) goto err; ret = 1; err: - if(!val) OPENSSL_free(tmpval); + if (os.data) + OPENSSL_free(os.data); return ret; } -- 2.25.1