/src/openssl30/crypto/ct/ct_oct.c

Source (jump to first uncovered line)
/*
 * Copyright 2016-2020 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the Apache License 2.0 (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

#ifdef OPENSSL_NO_CT
# error "CT is disabled"
#endif

#include <limits.h>
#include <string.h>

#include <openssl/asn1.h>
#include <openssl/buffer.h>
#include <openssl/ct.h>
#include <openssl/err.h>

#include "ct_local.h"

int o2i_SCT_signature(SCT *sct, const unsigned char **in, size_t len)
{
    size_t siglen;
    size_t len_remaining = len;
    const unsigned char *p;

    if (sct->version != SCT_VERSION_V1) {
        ERR_raise(ERR_LIB_CT, CT_R_UNSUPPORTED_VERSION);
        return -1;
    }
    /*
     * digitally-signed struct header: (1 byte) Hash algorithm (1 byte)
     * Signature algorithm (2 bytes + ?) Signature
     *
     * This explicitly rejects empty signatures: they're invalid for
     * all supported algorithms.
     */
    if (len <= 4) {
        ERR_raise(ERR_LIB_CT, CT_R_SCT_INVALID_SIGNATURE);
        return -1;
    }

    p = *in;
    /* Get hash and signature algorithm */
    sct->hash_alg = *p++;
    sct->sig_alg = *p++;
    if (SCT_get_signature_nid(sct) == NID_undef) {
        ERR_raise(ERR_LIB_CT, CT_R_SCT_INVALID_SIGNATURE);
        return -1;
    }
    /* Retrieve signature and check it is consistent with the buffer length */
    n2s(p, siglen);
    len_remaining -= (p - *in);
    if (siglen > len_remaining) {
        ERR_raise(ERR_LIB_CT, CT_R_SCT_INVALID_SIGNATURE);
        return -1;
    }

    if (SCT_set1_signature(sct, p, siglen) != 1)
        return -1;
    len_remaining -= siglen;
    *in = p + siglen;

    return len - len_remaining;
}

SCT *o2i_SCT(SCT **psct, const unsigned char **in, size_t len)
{
    SCT *sct = NULL;
    const unsigned char *p;

    if (len == 0 || len > MAX_SCT_SIZE) {
        ERR_raise(ERR_LIB_CT, CT_R_SCT_INVALID);
        goto err;
    }

    if ((sct = SCT_new()) == NULL)
        goto err;

    p = *in;

    sct->version = *p;
    if (sct->version == SCT_VERSION_V1) {
        int sig_len;
        size_t len2;
        /*-
         * Fixed-length header:
         *   struct {
         *     Version sct_version;     (1 byte)
         *     log_id id;               (32 bytes)
         *     uint64 timestamp;        (8 bytes)
         *     CtExtensions extensions; (2 bytes + ?)
         *   }
         */
        if (len < 43) {
            ERR_raise(ERR_LIB_CT, CT_R_SCT_INVALID);
            goto err;
        }
        len -= 43;
        p++;
        sct->log_id = OPENSSL_memdup(p, CT_V1_HASHLEN);
        if (sct->log_id == NULL)
            goto err;
        sct->log_id_len = CT_V1_HASHLEN;
        p += CT_V1_HASHLEN;

        n2l8(p, sct->timestamp);

        n2s(p, len2);
        if (len < len2) {
            ERR_raise(ERR_LIB_CT, CT_R_SCT_INVALID);
            goto err;
        }
        if (len2 > 0) {
            sct->ext = OPENSSL_memdup(p, len2);
            if (sct->ext == NULL)
                goto err;
        }
        sct->ext_len = len2;
        p += len2;
        len -= len2;

        sig_len = o2i_SCT_signature(sct, &p, len);
        if (sig_len <= 0) {
            ERR_raise(ERR_LIB_CT, CT_R_SCT_INVALID);
            goto err;
        }
        len -= sig_len;
        *in = p + len;
    } else {
        /* If not V1 just cache encoding */
        sct->sct = OPENSSL_memdup(p, len);
        if (sct->sct == NULL)
            goto err;
        sct->sct_len = len;
        *in = p + len;
    }

    if (psct != NULL) {
        SCT_free(*psct);
        *psct = sct;
    }

    return sct;
err:
    SCT_free(sct);
    return NULL;
}

int i2o_SCT_signature(const SCT *sct, unsigned char **out)
{
    size_t len;
    unsigned char *p = NULL, *pstart = NULL;

    if (!SCT_signature_is_complete(sct)) {
        ERR_raise(ERR_LIB_CT, CT_R_SCT_INVALID_SIGNATURE);
        goto err;
    }

    if (sct->version != SCT_VERSION_V1) {
        ERR_raise(ERR_LIB_CT, CT_R_UNSUPPORTED_VERSION);
        goto err;
    }

    /*
    * (1 byte) Hash algorithm
    * (1 byte) Signature algorithm
    * (2 bytes + ?) Signature
    */
    len = 4 + sct->sig_len;

    if (out != NULL) {
        if (*out != NULL) {
            p = *out;
            *out += len;
        } else {
            pstart = p = OPENSSL_malloc(len);
            if (p == NULL) {
                ERR_raise(ERR_LIB_CT, ERR_R_MALLOC_FAILURE);
                goto err;
            }
            *out = p;
        }

        *p++ = sct->hash_alg;
        *p++ = sct->sig_alg;
        s2n(sct->sig_len, p);
        memcpy(p, sct->sig, sct->sig_len);
    }

    return len;
err:
    OPENSSL_free(pstart);
    return -1;
}

int i2o_SCT(const SCT *sct, unsigned char **out)
{
    size_t len;
    unsigned char *p = NULL, *pstart = NULL;

    if (!SCT_is_complete(sct)) {
        ERR_raise(ERR_LIB_CT, CT_R_SCT_NOT_SET);
        goto err;
    }
    /*
     * Fixed-length header: struct { (1 byte) Version sct_version; (32 bytes)
     * log_id id; (8 bytes) uint64 timestamp; (2 bytes + ?) CtExtensions
     * extensions; (1 byte) Hash algorithm (1 byte) Signature algorithm (2
     * bytes + ?) Signature
     */
    if (sct->version == SCT_VERSION_V1)
        len = 43 + sct->ext_len + 4 + sct->sig_len;
    else
        len = sct->sct_len;

    if (out == NULL)
        return len;

    if (*out != NULL) {
        p = *out;
        *out += len;
    } else {
        pstart = p = OPENSSL_malloc(len);
        if (p == NULL) {
            ERR_raise(ERR_LIB_CT, ERR_R_MALLOC_FAILURE);
            goto err;
        }
        *out = p;
    }

    if (sct->version == SCT_VERSION_V1) {
        *p++ = sct->version;
        memcpy(p, sct->log_id, CT_V1_HASHLEN);
        p += CT_V1_HASHLEN;
        l2n8(sct->timestamp, p);
        s2n(sct->ext_len, p);
        if (sct->ext_len > 0) {
            memcpy(p, sct->ext, sct->ext_len);
            p += sct->ext_len;
        }
        if (i2o_SCT_signature(sct, &p) <= 0)
            goto err;
    } else {
        memcpy(p, sct->sct, len);
    }

    return len;
err:
    OPENSSL_free(pstart);
    return -1;
}

STACK_OF(SCT) *o2i_SCT_LIST(STACK_OF(SCT) **a, const unsigned char **pp,
                            size_t len)
{
    STACK_OF(SCT) *sk = NULL;
    size_t list_len, sct_len;

    if (len < 2 || len > MAX_SCT_LIST_SIZE) {
        ERR_raise(ERR_LIB_CT, CT_R_SCT_LIST_INVALID);
        return NULL;
    }

    n2s(*pp, list_len);
    if (list_len != len - 2) {
        ERR_raise(ERR_LIB_CT, CT_R_SCT_LIST_INVALID);
        return NULL;
    }

    if (a == NULL || *a == NULL) {
        sk = sk_SCT_new_null();
        if (sk == NULL)
            return NULL;
    } else {
        SCT *sct;

        /* Use the given stack, but empty it first. */
        sk = *a;
        while ((sct = sk_SCT_pop(sk)) != NULL)
            SCT_free(sct);
    }

    while (list_len > 0) {
        SCT *sct;

        if (list_len < 2) {
            ERR_raise(ERR_LIB_CT, CT_R_SCT_LIST_INVALID);
            goto err;
        }
        n2s(*pp, sct_len);
        list_len -= 2;

        if (sct_len == 0 || sct_len > list_len) {
            ERR_raise(ERR_LIB_CT, CT_R_SCT_LIST_INVALID);
            goto err;
        }
        list_len -= sct_len;

        if ((sct = o2i_SCT(NULL, pp, sct_len)) == NULL)
            goto err;
        if (!sk_SCT_push(sk, sct)) {
            SCT_free(sct);
            goto err;
        }
    }

    if (a != NULL && *a == NULL)
        *a = sk;
    return sk;

 err:
    if (a == NULL || *a == NULL)
        SCT_LIST_free(sk);
    return NULL;
}

int i2o_SCT_LIST(const STACK_OF(SCT) *a, unsigned char **pp)
{
    int len, sct_len, i, is_pp_new = 0;
    size_t len2;
    unsigned char *p = NULL, *p2;

    if (pp != NULL) {
        if (*pp == NULL) {
            if ((len = i2o_SCT_LIST(a, NULL)) == -1) {
                ERR_raise(ERR_LIB_CT, CT_R_SCT_LIST_INVALID);
                return -1;
            }
            if ((*pp = OPENSSL_malloc(len)) == NULL) {
                ERR_raise(ERR_LIB_CT, ERR_R_MALLOC_FAILURE);
                return -1;
            }
            is_pp_new = 1;
        }
        p = *pp + 2;
    }

    len2 = 2;
    for (i = 0; i < sk_SCT_num(a); i++) {
        if (pp != NULL) {
            p2 = p;
            p += 2;
            if ((sct_len = i2o_SCT(sk_SCT_value(a, i), &p)) == -1)
                goto err;
            s2n(sct_len, p2);
        } else {
          if ((sct_len = i2o_SCT(sk_SCT_value(a, i), NULL)) == -1)
              goto err;
        }
        len2 += 2 + sct_len;
    }

    if (len2 > MAX_SCT_LIST_SIZE)
        goto err;

    if (pp != NULL) {
        p = *pp;
        s2n(len2 - 2, p);
        if (!is_pp_new)
            *pp += len2;
    }
    return len2;

 err:
    if (is_pp_new) {
        OPENSSL_free(*pp);
        *pp = NULL;
    }
    return -1;
}

STACK_OF(SCT) *d2i_SCT_LIST(STACK_OF(SCT) **a, const unsigned char **pp,
                            long len)
{
    ASN1_OCTET_STRING *oct = NULL;
    STACK_OF(SCT) *sk = NULL;
    const unsigned char *p;

    p = *pp;
    if (d2i_ASN1_OCTET_STRING(&oct, &p, len) == NULL)
        return NULL;

    p = oct->data;
    if ((sk = o2i_SCT_LIST(a, &p, oct->length)) != NULL)
        *pp += len;

    ASN1_OCTET_STRING_free(oct);
    return sk;
}

int i2d_SCT_LIST(const STACK_OF(SCT) *a, unsigned char **out)
{
    ASN1_OCTET_STRING oct;
    int len;

    oct.data = NULL;
    if ((oct.length = i2o_SCT_LIST(a, &oct.data)) == -1)
        return -1;

    len = i2d_ASN1_OCTET_STRING(&oct, out);
    OPENSSL_free(oct.data);
    return len;
}

Coverage Report

Created: 2025-06-13 06:58

Line	Count	Source (jump to first uncovered line)
1		/*
2		* Copyright 2016-2020 The OpenSSL Project Authors. All Rights Reserved.
3		*
4		* Licensed under the Apache License 2.0 (the "License"). You may not use
5		* this file except in compliance with the License. You can obtain a copy
6		* in the file LICENSE in the source distribution or at
7		* https://www.openssl.org/source/license.html
8		*/
9
10		#ifdef OPENSSL_NO_CT
11		# error "CT is disabled"
12		#endif
13
14		#include <limits.h>
15		#include <string.h>
16
17		#include <openssl/asn1.h>
18		#include <openssl/buffer.h>
19		#include <openssl/ct.h>
20		#include <openssl/err.h>
21
22		#include "ct_local.h"
23
24		int o2i_SCT_signature(SCT sct, const unsigned char *in, size_t len)
25	67.5k	{
26	67.5k	size_t siglen;
27	67.5k	size_t len_remaining = len;
28	67.5k	const unsigned char *p;
29
30	67.5k	if (sct->version != SCT_VERSION_V1) {
31	0	ERR_raise(ERR_LIB_CT, CT_R_UNSUPPORTED_VERSION);
32	0	return -1;
33	0	}
34		/*
35		* digitally-signed struct header: (1 byte) Hash algorithm (1 byte)
36		* Signature algorithm (2 bytes + ?) Signature
37		*
38		* This explicitly rejects empty signatures: they're invalid for
39		* all supported algorithms.
40		*/
41	67.5k	if (len <= 4) {
42	4.88k	ERR_raise(ERR_LIB_CT, CT_R_SCT_INVALID_SIGNATURE);
43	4.88k	return -1;
44	4.88k	}
45
46	62.6k	p = *in;
47		/* Get hash and signature algorithm */
48	62.6k	sct->hash_alg = *p++;
49	62.6k	sct->sig_alg = *p++;
50	62.6k	if (SCT_get_signature_nid(sct) == NID_undef) {
51	4.26k	ERR_raise(ERR_LIB_CT, CT_R_SCT_INVALID_SIGNATURE);
52	4.26k	return -1;
53	4.26k	}
54		/* Retrieve signature and check it is consistent with the buffer length */
55	58.4k	n2s(p, siglen);
56	58.4k	len_remaining -= (p - *in);
57	58.4k	if (siglen > len_remaining) {
58	3.47k	ERR_raise(ERR_LIB_CT, CT_R_SCT_INVALID_SIGNATURE);
59	3.47k	return -1;
60	3.47k	}
61
62	54.9k	if (SCT_set1_signature(sct, p, siglen) != 1)
63	0	return -1;
64	54.9k	len_remaining -= siglen;
65	54.9k	*in = p + siglen;
66
67	54.9k	return len - len_remaining;
68	54.9k	}
69
70		SCT o2i_SCT(SCT psct, const unsigned char *in, size_t len)
71	692k	{
72	692k	SCT *sct = NULL;
73	692k	const unsigned char *p;
74
75	692k	if (len == 0 \|\| len > MAX_SCT_SIZE) {
76	0	ERR_raise(ERR_LIB_CT, CT_R_SCT_INVALID);
77	0	goto err;
78	0	}
79
80	692k	if ((sct = SCT_new()) == NULL)
81	0	goto err;
82
83	692k	p = *in;
84
85	692k	sct->version = *p;
86	692k	if (sct->version == SCT_VERSION_V1) {
87	71.8k	int sig_len;
88	71.8k	size_t len2;
89		/*-
90		* Fixed-length header:
91		* struct {
92		* Version sct_version; (1 byte)
93		* log_id id; (32 bytes)
94		* uint64 timestamp; (8 bytes)
95		* CtExtensions extensions; (2 bytes + ?)
96		* }
97		*/
98	71.8k	if (len < 43) {
99	1.86k	ERR_raise(ERR_LIB_CT, CT_R_SCT_INVALID);
100	1.86k	goto err;
101	1.86k	}
102	69.9k	len -= 43;
103	69.9k	p++;
104	69.9k	sct->log_id = OPENSSL_memdup(p, CT_V1_HASHLEN);
105	69.9k	if (sct->log_id == NULL)
106	0	goto err;
107	69.9k	sct->log_id_len = CT_V1_HASHLEN;
108	69.9k	p += CT_V1_HASHLEN;
109
110	69.9k	n2l8(p, sct->timestamp);
111
112	69.9k	n2s(p, len2);
113	69.9k	if (len < len2) {
114	2.38k	ERR_raise(ERR_LIB_CT, CT_R_SCT_INVALID);
115	2.38k	goto err;
116	2.38k	}
117	67.5k	if (len2 > 0) {
118	20.5k	sct->ext = OPENSSL_memdup(p, len2);
119	20.5k	if (sct->ext == NULL)
120	0	goto err;
121	20.5k	}
122	67.5k	sct->ext_len = len2;
123	67.5k	p += len2;
124	67.5k	len -= len2;
125
126	67.5k	sig_len = o2i_SCT_signature(sct, &p, len);
127	67.5k	if (sig_len <= 0) {
128	12.6k	ERR_raise(ERR_LIB_CT, CT_R_SCT_INVALID);
129	12.6k	goto err;
130	12.6k	}
131	54.9k	len -= sig_len;
132	54.9k	*in = p + len;
133	620k	} else {
134		/* If not V1 just cache encoding */
135	620k	sct->sct = OPENSSL_memdup(p, len);
136	620k	if (sct->sct == NULL)
137	0	goto err;
138	620k	sct->sct_len = len;
139	620k	*in = p + len;
140	620k	}
141
142	675k	if (psct != NULL) {
143	0	SCT_free(*psct);
144	0	*psct = sct;
145	0	}
146
147	675k	return sct;
148	16.8k	err:
149	16.8k	SCT_free(sct);
150	16.8k	return NULL;
151	692k	}
152
153		int i2o_SCT_signature(const SCT sct, unsigned char *out)
154	7.20k	{
155	7.20k	size_t len;
156	7.20k	unsigned char p = NULL, pstart = NULL;
157
158	7.20k	if (!SCT_signature_is_complete(sct)) {
159	0	ERR_raise(ERR_LIB_CT, CT_R_SCT_INVALID_SIGNATURE);
160	0	goto err;
161	0	}
162
163	7.20k	if (sct->version != SCT_VERSION_V1) {
164	0	ERR_raise(ERR_LIB_CT, CT_R_UNSUPPORTED_VERSION);
165	0	goto err;
166	0	}
167
168		/*
169		* (1 byte) Hash algorithm
170		* (1 byte) Signature algorithm
171		* (2 bytes + ?) Signature
172		*/
173	7.20k	len = 4 + sct->sig_len;
174
175	7.20k	if (out != NULL) {
176	7.20k	if (*out != NULL) {
177	7.20k	p = *out;
178	7.20k	*out += len;
179	7.20k	} else {
180	0	pstart = p = OPENSSL_malloc(len);
181	0	if (p == NULL) {
182	0	ERR_raise(ERR_LIB_CT, ERR_R_MALLOC_FAILURE);
183	0	goto err;
184	0	}
185	0	*out = p;
186	0	}
187
188	7.20k	*p++ = sct->hash_alg;
189	7.20k	*p++ = sct->sig_alg;
190	7.20k	s2n(sct->sig_len, p);
191	7.20k	memcpy(p, sct->sig, sct->sig_len);
192	7.20k	}
193
194	7.20k	return len;
195	0	err:
196	0	OPENSSL_free(pstart);
197	0	return -1;
198	7.20k	}
199
200		int i2o_SCT(const SCT sct, unsigned char *out)
201	763k	{
202	763k	size_t len;
203	763k	unsigned char p = NULL, pstart = NULL;
204
205	763k	if (!SCT_is_complete(sct)) {
206	763	ERR_raise(ERR_LIB_CT, CT_R_SCT_NOT_SET);
207	763	goto err;
208	763	}
209		/*
210		* Fixed-length header: struct { (1 byte) Version sct_version; (32 bytes)
211		* log_id id; (8 bytes) uint64 timestamp; (2 bytes + ?) CtExtensions
212		* extensions; (1 byte) Hash algorithm (1 byte) Signature algorithm (2
213		* bytes + ?) Signature
214		*/
215	762k	if (sct->version == SCT_VERSION_V1)
216	15.5k	len = 43 + sct->ext_len + 4 + sct->sig_len;
217	747k	else
218	747k	len = sct->sct_len;
219
220	762k	if (out == NULL)
221	384k	return len;
222
223	378k	if (*out != NULL) {
224	378k	p = *out;
225	378k	*out += len;
226	378k	} else {
227	0	pstart = p = OPENSSL_malloc(len);
228	0	if (p == NULL) {
229	0	ERR_raise(ERR_LIB_CT, ERR_R_MALLOC_FAILURE);
230	0	goto err;
231	0	}
232	0	*out = p;
233	0	}
234
235	378k	if (sct->version == SCT_VERSION_V1) {
236	7.20k	*p++ = sct->version;
237	7.20k	memcpy(p, sct->log_id, CT_V1_HASHLEN);
238	7.20k	p += CT_V1_HASHLEN;
239	7.20k	l2n8(sct->timestamp, p);
240	7.20k	s2n(sct->ext_len, p);
241	7.20k	if (sct->ext_len > 0) {
242	3.88k	memcpy(p, sct->ext, sct->ext_len);
243	3.88k	p += sct->ext_len;
244	3.88k	}
245	7.20k	if (i2o_SCT_signature(sct, &p) <= 0)
246	0	goto err;
247	370k	} else {
248	370k	memcpy(p, sct->sct, len);
249	370k	}
250
251	378k	return len;
252	763	err:
253	763	OPENSSL_free(pstart);
254	763	return -1;
255	378k	}
256
257		STACK_OF(SCT) o2i_SCT_LIST(STACK_OF(SCT) a, const unsigned char *pp,
258		size_t len)
259	69.0k	{
260	69.0k	STACK_OF(SCT) *sk = NULL;
261	69.0k	size_t list_len, sct_len;
262
263	69.0k	if (len < 2 \|\| len > MAX_SCT_LIST_SIZE) {
264	2.25k	ERR_raise(ERR_LIB_CT, CT_R_SCT_LIST_INVALID);
265	2.25k	return NULL;
266	2.25k	}
267
268	66.7k	n2s(*pp, list_len);
269	66.7k	if (list_len != len - 2) {
270	4.56k	ERR_raise(ERR_LIB_CT, CT_R_SCT_LIST_INVALID);
271	4.56k	return NULL;
272	4.56k	}
273
274	62.1k	if (a == NULL \|\| *a == NULL) {
275	62.1k	sk = sk_SCT_new_null();
276	62.1k	if (sk == NULL)
277	0	return NULL;
278	62.1k	} else {
279	0	SCT *sct;
280
281		/* Use the given stack, but empty it first. */
282	0	sk = *a;
283	0	while ((sct = sk_SCT_pop(sk)) != NULL)
284	0	SCT_free(sct);
285	0	}
286
287	738k	while (list_len > 0) {
288	701k	SCT *sct;
289
290	701k	if (list_len < 2) {
291	2.94k	ERR_raise(ERR_LIB_CT, CT_R_SCT_LIST_INVALID);
292	2.94k	goto err;
293	2.94k	}
294	698k	n2s(*pp, sct_len);
295	698k	list_len -= 2;
296
297	698k	if (sct_len == 0 \|\| sct_len > list_len) {
298	5.47k	ERR_raise(ERR_LIB_CT, CT_R_SCT_LIST_INVALID);
299	5.47k	goto err;
300	5.47k	}
301	692k	list_len -= sct_len;
302
303	692k	if ((sct = o2i_SCT(NULL, pp, sct_len)) == NULL)
304	16.8k	goto err;
305	675k	if (!sk_SCT_push(sk, sct)) {
306	0	SCT_free(sct);
307	0	goto err;
308	0	}
309	675k	}
310
311	36.9k	if (a != NULL && *a == NULL)
312	0	*a = sk;
313	36.9k	return sk;
314
315	25.2k	err:
316	25.2k	if (a == NULL \|\| *a == NULL)
317	25.2k	SCT_LIST_free(sk);
318	25.2k	return NULL;
319	62.1k	}
320
321		int i2o_SCT_LIST(const STACK_OF(SCT) a, unsigned char *pp)
322	4.52k	{
323	4.52k	int len, sct_len, i, is_pp_new = 0;
324	4.52k	size_t len2;
325	4.52k	unsigned char p = NULL, p2;
326
327	4.52k	if (pp != NULL) {
328	2.26k	if (*pp == NULL) {
329	2.26k	if ((len = i2o_SCT_LIST(a, NULL)) == -1) {
330	763	ERR_raise(ERR_LIB_CT, CT_R_SCT_LIST_INVALID);
331	763	return -1;
332	763	}
333	1.50k	if ((*pp = OPENSSL_malloc(len)) == NULL) {
334	0	ERR_raise(ERR_LIB_CT, ERR_R_MALLOC_FAILURE);
335	0	return -1;
336	0	}
337	1.50k	is_pp_new = 1;
338	1.50k	}
339	1.50k	p = *pp + 2;
340	1.50k	}
341
342	3.76k	len2 = 2;
343	766k	for (i = 0; i < sk_SCT_num(a); i++) {
344	763k	if (pp != NULL) {
345	378k	p2 = p;
346	378k	p += 2;
347	378k	if ((sct_len = i2o_SCT(sk_SCT_value(a, i), &p)) == -1)
348	0	goto err;
349	378k	s2n(sct_len, p2);
350	385k	} else {
351	385k	if ((sct_len = i2o_SCT(sk_SCT_value(a, i), NULL)) == -1)
352	763	goto err;
353	385k	}
354	762k	len2 += 2 + sct_len;
355	762k	}
356
357	3.00k	if (len2 > MAX_SCT_LIST_SIZE)
358	0	goto err;
359
360	3.00k	if (pp != NULL) {
361	1.50k	p = *pp;
362	1.50k	s2n(len2 - 2, p);
363	1.50k	if (!is_pp_new)
364	0	*pp += len2;
365	1.50k	}
366	3.00k	return len2;
367
368	763	err:
369	763	if (is_pp_new) {
370	0	OPENSSL_free(*pp);
371	0	*pp = NULL;
372	0	}
373	763	return -1;
374	3.00k	}
375
376		STACK_OF(SCT) d2i_SCT_LIST(STACK_OF(SCT) a, const unsigned char *pp,
377		long len)
378	77.4k	{
379	77.4k	ASN1_OCTET_STRING *oct = NULL;
380	77.4k	STACK_OF(SCT) *sk = NULL;
381	77.4k	const unsigned char *p;
382
383	77.4k	p = *pp;
384	77.4k	if (d2i_ASN1_OCTET_STRING(&oct, &p, len) == NULL)
385	8.46k	return NULL;
386
387	69.0k	p = oct->data;
388	69.0k	if ((sk = o2i_SCT_LIST(a, &p, oct->length)) != NULL)
389	36.9k	*pp += len;
390
391	69.0k	ASN1_OCTET_STRING_free(oct);
392	69.0k	return sk;
393	77.4k	}
394
395		int i2d_SCT_LIST(const STACK_OF(SCT) a, unsigned char *out)
396	2.26k	{
397	2.26k	ASN1_OCTET_STRING oct;
398	2.26k	int len;
399
400	2.26k	oct.data = NULL;
401	2.26k	if ((oct.length = i2o_SCT_LIST(a, &oct.data)) == -1)
402	763	return -1;
403
404	1.50k	len = i2d_ASN1_OCTET_STRING(&oct, out);
405	1.50k	OPENSSL_free(oct.data);
406	1.50k	return len;
407	2.26k	}