NeoMutt  2020-08-21-74-g346364
Teaching an old dog new tricks
DOXYGEN
pgplib.c
Go to the documentation of this file.
1 
29 #include "config.h"
30 #include <stdbool.h>
31 #include "mutt/lib.h"
32 #ifdef CRYPT_BACKEND_CLASSIC_PGP
33 #include "pgplib.h"
34 #endif
35 
41 const char *pgp_pkalgbytype(unsigned char type)
42 {
43  switch (type)
44  {
45  case 1:
46  return "RSA";
47  case 2:
48  return "RSA";
49  case 3:
50  return "RSA";
51  case 16:
52  return "ElG";
53  case 17:
54  return "DSA";
55  case 20:
56  return "ElG";
57  default:
58  return "unk";
59  }
60 }
61 
67 bool pgp_canencrypt(unsigned char type)
68 {
69  switch (type)
70  {
71  case 1:
72  case 2:
73  case 16:
74  case 20:
75  return true;
76  default:
77  return false;
78  }
79 }
80 
86 bool pgp_cansign(unsigned char type)
87 {
88  switch (type)
89  {
90  case 1:
91  case 3:
92  case 17:
93  case 20:
94  return true;
95  default:
96  return false;
97  }
98 }
99 
104 static void pgp_uid_free(struct PgpUid **upp)
105 {
106  struct PgpUid *up = NULL, *q = NULL;
107 
108  if (!upp || !*upp)
109  return;
110  for (up = *upp; up; up = q)
111  {
112  q = up->next;
113  FREE(&up->addr);
114  FREE(&up);
115  }
116 
117  *upp = NULL;
118 }
119 
126 struct PgpUid *pgp_copy_uids(struct PgpUid *up, struct PgpKeyInfo *parent)
127 {
128  struct PgpUid *l = NULL;
129  struct PgpUid **lp = &l;
130 
131  for (; up; up = up->next)
132  {
133  *lp = mutt_mem_calloc(1, sizeof(struct PgpUid));
134  (*lp)->trust = up->trust;
135  (*lp)->flags = up->flags;
136  (*lp)->addr = mutt_str_dup(up->addr);
137  (*lp)->parent = parent;
138  lp = &(*lp)->next;
139  }
140 
141  return l;
142 }
143 
148 static void key_free(struct PgpKeyInfo **kpp)
149 {
150  if (!kpp || !*kpp)
151  return;
152 
153  struct PgpKeyInfo *kp = *kpp;
154 
155  pgp_uid_free(&kp->address);
156  FREE(&kp->keyid);
157  FREE(&kp->fingerprint);
158  FREE(kpp);
159 }
160 
167 struct PgpKeyInfo *pgp_remove_key(struct PgpKeyInfo **klist, struct PgpKeyInfo *key)
168 {
169  if (!klist || !*klist || !key)
170  return NULL;
171 
172  struct PgpKeyInfo **last = NULL;
173  struct PgpKeyInfo *p = NULL, *q = NULL, *r = NULL;
174 
175  if (key->parent && (key->parent != key))
176  key = key->parent;
177 
178  last = klist;
179  for (p = *klist; p && p != key; p = p->next)
180  last = &p->next;
181 
182  if (!p)
183  return NULL;
184 
185  for (q = p->next, r = p; q && q->parent == p; q = q->next)
186  r = q;
187 
188  if (r)
189  r->next = NULL;
190 
191  *last = q;
192  return q;
193 }
194 
199 void pgp_key_free(struct PgpKeyInfo **kpp)
200 {
201  if (!kpp || !*kpp)
202  return;
203 
204  struct PgpKeyInfo *p = NULL, *q = NULL, *r = NULL;
205 
206  if ((*kpp)->parent && ((*kpp)->parent != *kpp))
207  *kpp = (*kpp)->parent;
208 
209  /* Order is important here:
210  *
211  * - First free all children.
212  * - If we are an orphan (i.e., our parent was not in the key list),
213  * free our parent.
214  * - free ourselves. */
215 
216  for (p = *kpp; p; p = q)
217  {
218  for (q = p->next; q && q->parent == p; q = r)
219  {
220  r = q->next;
221  key_free(&q);
222  }
223 
224  key_free(&p->parent);
225  key_free(&p);
226  }
227 
228  *kpp = NULL;
229 }
struct PgpKeyInfo * next
Definition: pgplib.h:57
void * mutt_mem_calloc(size_t nmemb, size_t size)
Allocate zeroed memory on the heap.
Definition: memory.c:50
const char * pgp_pkalgbytype(unsigned char type)
Get the name of the algorithm from its ID.
Definition: pgplib.c:41
struct PgpUid * next
Definition: pgplib.h:40
char * mutt_str_dup(const char *str)
Copy a string, safely.
Definition: string.c:370
PGP User ID.
Definition: pgplib.h:34
bool pgp_canencrypt(unsigned char type)
Does this algorithm ID support encryption?
Definition: pgplib.c:67
char * keyid
Definition: pgplib.h:48
char * addr
Definition: pgplib.h:36
Information about a PGP key.
Definition: pgplib.h:46
short trust
Definition: pgplib.h:37
void pgp_key_free(struct PgpKeyInfo **kpp)
Free a PGP key info.
Definition: pgplib.c:199
struct PgpUid * pgp_copy_uids(struct PgpUid *up, struct PgpKeyInfo *parent)
Copy a list of PGP UIDs.
Definition: pgplib.c:126
struct PgpUid * address
Definition: pgplib.h:50
struct PgpKeyInfo * pgp_remove_key(struct PgpKeyInfo **klist, struct PgpKeyInfo *key)
Remove a PGP key from a list.
Definition: pgplib.c:167
struct PgpKeyInfo * parent
Definition: pgplib.h:39
Misc PGP helper routines.
bool pgp_cansign(unsigned char type)
Does this algorithm ID support signing?
Definition: pgplib.c:86
#define FREE(x)
Definition: memory.h:40
struct PgpKeyInfo * parent
Definition: pgplib.h:56
static void pgp_uid_free(struct PgpUid **upp)
Free a PGP UID.
Definition: pgplib.c:104
Convenience wrapper for the library headers.
char * fingerprint
Definition: pgplib.h:49
int flags
Definition: pgplib.h:38
static void key_free(struct PgpKeyInfo **kpp)
Free a PGP Key info.
Definition: pgplib.c:148